• 专利附录
  • 专利说明
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    • 专利摘要:
    non-contact power supply device a non-contact electricity source device is provided that detects foreign objects interposed between an energy transmission coil and an energy receiving coil. this non-contact power supply device is provided with a second coil that non-contact transmits energy to or receives energy from a first coil at least by means of magnetic coupling, with multiple sensors to detect position shifts between the first coil and second coil, a position detection device that, based on sensor output values, detects the relative positions of the first coil and second coil, and a foreign object detection device that compares the values of sensor output and from these comparison results it detects foreign objects between the first coil and the second coil.
    公开号:BR112013029933B1
    申请号:R112013029933-9
    申请日:2012-02-08
    公开日:2021-02-23
    发明作者:Masaki Konno；Hiroshi Tanaka；Tomoya Imazu
    申请人:Nissan Motor Co., Ltd；
    IPC主号:
    专利说明:

    Technical Field
    The present invention relates to a non-contact electricity source device. Foundation Technique
    An electricity source system is known which includes: a power supply device; a power receiving device for receiving energy contactlessly from the power supply device; an efficiency perception device for perceiving a transmission efficiency between the energy supply device and the energy receiving device; a determination device for determining whether or not the perceived transmission efficiency is above a prescribed value; and a control device to determine which normal electricity supply is impeded by an obstacle, etc., in response to a condition in which the perceived transmission efficiency is below the prescribed value, and to temporarily suspend the power supply of the monitoring device. power supply, and restart the low power supply for a prescribed period of time after suspension (see patent document 1).
    However, since transmission efficiency can be decreased when the power supply coil and the power receiving coil are shifted in position with each other, it has been impossible to detect, based on the change in transmission efficiency, a foreign object coming between the power supply coil and the power receiving coil.
    A problem to be solved by the present invention is to provide a non-contact electricity source device that detects a foreign object between a power supply coil and an energy receiving coil. Prior Art Documents Patent Documents Patent Document 1: JP 2010-119246 A. Summary of the Invention
    The problem is solved by the present invention comprising: a second coil that sends or receives electricity to or from a first coil in a non-contact manner at least through magnetic coupling between them; several sensors to perceive a position deviation between the first coil and the second coil; a position perception device that perceives a position relationship between the first coil 35 and the second coil based on the output values of the various sensors; and a foreign object detection device that compares the output values of the various sensors with each other, and detects a foreign object between the first coil and the second coil based on a comparison result.
    According to the present invention, it is also possible to detect a foreign object between the first and second coils by using the sensors to perceive the position relationship between the first coil and the second coil, due to the output values of the sensors changing when the foreign object is placed between the first coil and the second coil. Brief Description of the Drawings FIG. 1 is a block diagram of a non-contact electricity source system according to an embodiment of the present invention. FIG. 2 is a perspective view of a power supply coil, a signal receiving section, an energy receiving coil, and a signal sending section, which are included in the electricity source system without contact of FIG. 1. FIG. 3 presents a condition where the power supply coil and the power receiving coil included in the non-contact electricity source system of FIG. 1 are facing each other without deviation of position, where FIG. 3A is a plan view, and FIGS. 3B and 3C are seen in perspective. FIG. 4 presents a condition where the power supply coil and the power receiving coil included in the non-contact electricity source system of FIG. 1 are facing each other with a position deviation, where FIG. 4A is a plan view and FIGS. 4B and 4C are seen in perspective. FIG. 5 presents a condition where the power supply coil and the power receiving coil included in the non-contact electricity source system of FIG. 1 are facing each other with a deviation of position and a foreign object is present between the power supply coil and the power receiving coil, where FIG. 5A is a plan view and FIGS. 5B and 5C are seen in perspective. FIG. 6 is a flowchart showing a process for controlling a non-contact electricity source device included in a non-contact electricity source system according to another embodiment of the present invention. FIG. 7 is a flowchart showing a process for controlling a remote communication control shown in FIG. 6. FIG. 8 is a flowchart showing a process for controlling a position perception control shown in FIG. 6. Modes for Carrying Out the Invention
    The following statement describes an embodiment of the present invention with reference to the drawings. FIG. 1 is a block diagram of a non-contact electricity source system including a vehicle 200 and an electricity source device 100, which includes a non-contact electricity source device according to the embodiment of the present invention. A unit on the vehicle side of the non-contact electricity source device of the embodiment is mounted on an electric vehicle, but can be mounted on a hybrid electric vehicle or the like.
    As shown in FIG. 1, the contactless electricity source system of this embodiment includes vehicle 200 and electricity source device 100, where vehicle 200 includes the unit on the side of the vehicle, and the electricity source device 100 is a unit on the ground side. In this system, power is supplied without contact from the electricity source device 100 which is provided in an electricity source station or the like, to charge a battery 28 which is provided in the vehicle 200.
    The electricity source device 100 includes a power control section 11, a power supply coil 12, a signal receiving section 13, a wireless communication section 14, and a control section 15. The device electricity source 100 is a ground-side unit that is provided in a parking space where vehicle 200 is parked, and provides power by contactless electricity supply between coils when vehicle 200 is parked in a specific parking position.
    The power control section 11 is a circuit to perform a conversion from an alternating current energy sent from an alternating current energy source 300 to a high frequency alternating current energy, and sending it to the power supply 12. The power control section 11 includes a rectification section 111, a PFC (Power Factor Correction) circuit 112, an inverter 113, and a sensor 114. The rectification section 111 is a circuit that is electrically connected to the AC power source 300, and rectifies the AC power emitted from the AC power source 300. The PFC circuit 112 is a circuit to improve the power factor by formatting the waveform emitted from rectification section 111, and is connected between rectification section 111 and inverter 113. Inverter 113 is a power conversion circuit that includes a final filtration capacitor, and an e switching element such as an IGBT. The inverter 113 converts a direct current energy to a high frequency alternating current energy based on the switching control signal from control section 15, and supplies it to the power supply coil 12. Sensor 114 is connected between PFC circuit 112 and inverter 113, and perceives current and electrical voltage. The power supply coil 12 is a coil for supplying non-contact power to a power receiving coil 22 that is provided in the vehicle 200. The power supply coil 12 is provided in a parking space where the power source device contactless of this embodiment is provided.
    When vehicle 200 is parked in a specified parking position, the power supply coil 12 is positioned below the power supply coil 22 some distance from the power supply coil 22. The power supply coil 12 is a circular coil that is parallel to the surface of the parking space.
    The signal receiving section 13 is a sensor composed of signal receiving antennas, and is provided in the electricity source device 100 on the ground side, and receives an electromagnetic wave, which is sent from the signal sending section. signal 23, by measuring the magnetic field around the signal receiving antennas. Each signal receiving antenna is a magnetic field antenna or something. The frequency of the electromagnetic wave sent and received between the signal receiving section 13 and the signal sending section 23 is established less than the communication frequency between the wireless communication section 14 and an unused communication section yarn 24 which is described below. The frequency of the electromagnetic wave belongs to or is close to a frequency band used by a vehicle peripheral device such as an intelligent switch. The communication between the signal reception section 13 and the signal sending section 23 is implemented by a communication system suitable for short distance communication, compared to the communication between the wireless communication section 12 and the section wireless communication network 24 which is described below.
    The wireless communication section 14 performs bidirectional communication with the wireless communication section 24 that is provided in the vehicle 200. The wireless communication section 14 is provided in the electricity source device 100 on the side of the ground. The communication frequency between the wireless communication section 14 and the wireless communication section 24 is set higher than the frequency used for communication between the signal receiving section 13 and the signal sending section 23, and also higher than the frequency used by a vehicle peripheral device such as an intelligent key. As a result, the vehicle's peripheral device is unlikely to be subject to interference due to communication between the wireless communication section 14 and the wireless communication section 24. Communication between the wireless communication section 14 and the wireless communication section 24 is implemented by a wireless LAN system or the like. The communication between the wireless communication section 14 and the wireless communication section 24 is thus implemented by a communication system suitable for long distance communication, compared to the communication between the wireless reception section. signal 13 and signal sending section 23.
    Control section 15 is a section for controlling the electricity source device 100 as a whole. Control section 15 includes a distance measurement section 151, a position perception section 152, and an object detection section strange 153, and controls the power control section 11, the power supply coil 12, the signal receiving section 13, and the wireless communication section 14. The control section 15 sends to the vehicle 200 a control signal indicating a start of power supply from the electricity source device 100, and receives from the vehicle 200 a control signal indicating a request to receive power from the electricity source device 100, for the communication between the wireless communication section 14 and the wireless communication section 24. The control section 15 performs switching control of the inverter 113, and thus controls the power supplied to 10 from b power supply cable 12, depending on a current perceived by sensor 114.
    The vehicle 200 includes the energy receiving coil 22, the signal sending section 23, the wireless communication section 24, a load control section 25, a rectifying section 26, a relay section 27, a battery 28, an inverter 29, and an electric motor 15. The energy receiving coil 22 is provided on the bottom surface (chassis) or the like of the vehicle 200, and between the rear wheels of the vehicle 200. When the vehicle 200 is parked in the specified parking position, the power take-up coil 22 is positioned above the power take-up coil 12 some distance from the power take-up coil 12. The power take-up coil 20 22 is a circular coil that is parallel to the surface of the parking space.
    The signal sending section 23 is a sensor composed of a signal sending antenna, and is provided in the vehicle 200, and sends an electromagnetic wave to the signal receiving section 13. The signal sending antenna is a signal antenna. magnetic field or something. The wireless communication section 24 performs bidirectional communication 25 with the wireless communication section 14 provided in the electricity source device 100. The wireless communication section 24 is provided in the vehicle 200.
    The rectifying section 26 is connected to the energy receiving coil 22, and consists of a rectifying circuit to rectify an alternating current received in the energy receiving coil 22 to a direct current. The relay section 27 includes a relay switch that is switched on and off under control of load control section 25. When the relay switch is turned off, relay section 27 separates a higher power system including battery 28 from a lower power system including energy receiving coil 22 and rectifying section 26 that constitute a circuit section for loading.
    Battery 28 is made up of several secondary cells connected with each other, and serves as a vehicle 200 power supply. Inverter 29 is a control circuit such as a PWM control circuit including a switching element such as an IGBT . The inverter 29 converts to a direct current energy a direct current energy emitted from the battery 28, and supplies the same to the electric motor 30, depending on a switching control signal. Electric motor 30 is a three-phase alternating current motor or the like, and serves as a driving source for driving vehicle 200.
    The charge control section 25 is a controller for controlling the battery charge 28. The charge control section 25 controls the signal sending section 23, the wireless communication section 24, and the load 25. The load control section 25 sends to the control section 15 a signal indicating a start of load, through the communication between the wireless communication section 24 and the wireless communication section 14. The section load control unit 25 is connected via a CAN communication network with an unseen controller that controls the entire vehicle 200. This controller manages the switching control of the inverter 28 and the charge state (SOC) of the battery 22. The section charge control unit 15 sends a signal indicating a charge end to control unit 15, depending on the SOC of the battery 22, when full charge is reached.
    In the non-contact electricity source device of this embodiment, the power supply and the reception of high frequency power energy is implemented by the electromagnetic induction between the power supply coil 12 and the power receiving coil 22 which are outside contact with each other. In other words, when an electrical voltage is applied to the power supply coil 12, then the magnetic coupling occurs between the power supply coil 12 and the power receiving coil 22, so that power is supplied from the power supply coil 12 for power receiving coil 22.
    The following statement describes the configuration of the signal receiving section 13 and the signal sending section 23 with reference to FIG. 2. FIG. 2 is a perspective view of the power supply coil 12, the signal receiving section 13, the energy receiving coil 22, and the signal sending section 23, which are included in the electricity source device without contact for this achievement.
    The signal receiving section 13 is composed of four signal receiving antennas 13a, 13b, 13c, 13d which are provided on the periphery of the power supply coil 12. The signal receiving antennas 13a, 13b, 13c, 13d are arranged in symmetry with respect to the center of the power supply coil 12. The signal sending section 23 is composed of a single signal sending antenna which is provided at the central point of the signal sending section 23.
    The positions of the power supply coil 12 and the signal receiving section 13 are unchanged, due to the power supply coil 12 and the signal receiving section 13 being provided in the power supply device 100 on the side of the ground. On the other hand, the positions of the energy receiving coil 22 and the signal sending section 23 are changed with respect to the positions of the energy supply coil 12 and the signal receiving section 13, depending on the vehicle's parking position. 200 with respect to the prescribed parking space, due to the energy receiving coil 22 and the signal sending section 23 being provided in the vehicle 200.
    The signal receiving section 13 and the signal sending section 23 are arranged so that the distance between the position of each signal receiving antenna 13a, 13b, 13c, 13d and the position of the signal sending section 23 is equal to one another when vehicle 200 is parked in the prescribed parking space so that the center point of the energy receiving coil 22 and the center point of the energy supply coil 12 are identical to each other in the direction of the coil planes between the power receiving coil 22 and the power supply coil 12, i.e., towards the surfaces of the power receiving coil 22 and the power supply coil 12.
    Each signal receiving antenna 13a, 13b, 13c, 13d receives a signal sent from the antenna of the signal sending section 23. When the center point of the power receiving coil 22 and the center point of the power supply coil 12 are identical in the direction of the surfaces of the energy receiving coil 22 and the energy supply coil 12, the signal strength received by each signal receiving antenna 13a, 13b, 13c, 13d is equal to one another. On the other hand, when the center point of the energy receiving coil 22 and the center point of the energy supply coil 12 are offset from each other, the signal strength received by each signal receiving antenna 13a, 13b, 13c, 13d is not the same as the other. Consequently, in this embodiment, the position deviation of the coil is detected by the perception of the position relationship between the power supply coil 12 and the power receiving coil 22 based on the output values of the various sensors configured in the receiving section of signal 13 and in the signal sending section 23 as described below.
    The following statement describes a control performed by the control section 15 and the load control section 25 with reference to FIGS. 1 and 2.
    Control section 15 performs a system check as a start-up control, determining whether the systems of the electricity source device 100 operate normally or not. Similarly, the load control section 25 performs a system check as an initialization control, determining whether a vehicle load system 200 operates normally or not. When the result of the system check indicates that a system abnormality is present in the vehicle 200, the control section 15 informs a user. When the result of the system check indicates that a system abnormality is present in the electricity source device 100, the control section 15 notifies a center or the like that is managing the electricity source device 100. On the other hand, when the system check is normal, the control section 15 initializes the wireless communication section 14, and thereby establishes a condition where a signal can be received. For example, the system check against the electricity source device 100 is performed at intervals for a specified period, while the system check against the vehicle 200 is performed when a master switch is turned on where the master switch serves to drive vehicle 200.
    The control section 15 and the load control section 25 control the wireless communication section 14 and the wireless communication section 24, respectively, by the following remote communication control. First, the load control section 25 obtains information about the current position of the vehicle 200 by a GPS function provided on the vehicle 200, and determines whether or not the current position of the vehicle 200 is within a predetermined load point. The charge point is set individually for the electricity source device 100, and is, for example, a region that is displayed on a map as a circle having a center at the position of the electricity source device 100. The condition that the vehicle 200 is within the charge point means that the battery charge 28 will be implemented by the electricity source device 100 corresponding to the charge point.
    When the vehicle's current position 200 is within the load point, the load control section 25 initializes the wireless communication section 24, and thereby allows communication between the wireless communication section 14 and the wireless communication section 24. When communication is allowed between wireless communication section 14 and wireless communication section 24, then the load control section 25 sends from the communication section without using wires 24 for the communication without using wires 14 a signal to establish a data connection. Then, the control section 15 sends back from the wireless communication section 14 to the wireless communication section 24 a signal indicating that the control section 15 has received the signal. This process establishes the data connection between the wireless communication section 14 and the wireless communication section 24.
    In addition, the load control section 25 sends a vehicle ID 200 to the control section 15 through communication between the wireless communication section 14 and the wireless communication section 24. The control section 15 performs ID authentication by determining whether the ID sent from vehicle 200 matches or not one of the registered IDs. In this non-contact electricity source system, vehicles that can be charged 200 are proactively registered by ID on each electricity source device 100. As a result, vehicle 200 can receive electricity when ID authentication indicates that the vehicle ID 200 matches a registered ID.
    When the data connection is established and ID authentication is finished, then the load control section 25 sends a signal from the wireless communication section 24 to the wireless communication section 14 at predetermined intervals , while the vehicle 200 is approaching the electricity source device 100 corresponding to the charge point. The control section 15 measures the distance between the vehicle 200 and the electricity source device 100 by the distance measurement section 151. The wireless communication section 14 receives the signal sent periodically from the unused communication section of wire 24. The distance measurement section 151 measures the distance between the vehicle 200 and the electricity source device 100 based on the electrical field strength of the received signal.
    The control section 15 receives a limit value which is established as a predetermined vehicle approach limit value to indicate a condition in which the vehicle 200 has approached the electricity source device 100 so that the distance between the power supply coil energy 12 and the energy receiving coil 22 towards the surfaces of the energy supply coil 12 and the energy receiving coil 22 becomes short. In this embodiment, the vehicle approach limit value is prescribed in terms of signal strength, due to the strength of the received signal is correlated with the distance between the vehicle 200 and the electricity source device 100.
    Control section 15 compares the electric field power of the received signal with the vehicle's approach limit value, and determines whether or not the distance between the vehicle 200 and the electricity source device 100 is shorter than a prescribed value. . When the distance between the vehicle 200 and the electricity source device 100 is shorter than the prescribed value, then the control section 15 initializes the signal receiving section 13, and sends a control signal from the control section. wireless communication 14 for wireless communication section 24. Upon receiving the control signal, the load control section 25 initializes the signal sending section 23.
    Thus, in this embodiment, the sending and receiving of signal between the signal receiving section 13 and the signal sending section 23 is not constantly performed, but the signal receiving section 13 and the signal sending section 23 are initialized to perform signal sending and receiving, when vehicle 200 has approached electricity source device 100.
    After completing the remote communication control, the control section 15 and the load control section 25 perform a position perception control as stated below. When recognizing that the vehicle 200 is stationary, the load control section 25 sends a signal from the signal sending antenna of the signal sending section 23 to the signal receiving antennas 13a, 13b, 13c, 13d of the section signal reception 13. Control section 15 measures the output value of the signal received by each receiving antenna 13a, 13b, 13c, 13d, and first determines whether the signal receiving antennas 13a, 13b, 13c, 13d and the signal sending antenna is normal or not. The control section 15 receives an upper limit value and a lower limit value which are established as position determination limit values to determine anomalies of the antennas. When all the output values of the signal receiving antennas 13a, 13b, 13c, 13d are in the range from the lower limit value to the upper limit value, then the control section 15 determines that the signal receiving section 13 and the signal sending section 23 are operating normally. On the other hand, when the output value of the signal receiving antenna 13a, 13b, 13c, 13d is higher than the upper limit value or less than the lower limit value, then the control section 15 determines that at least at least one of the signal receiving section 13 and the signal sending section 23 is faulty. When determining that the signal reception section 13 or the signal sending section 23 is faulty, then the control section 15 sends a signal indicating the abnormality, through the wireless communication section 14 and the wireless communication 24 to the load control section 25. Then, the load control section 25 notifies the user of the abnormality of the signal receiving section 13 or the signal sending section 23. On the other hand, the control section 15 notifies the center, which is managing the electricity source device 100, of the abnormality of the signal receiving section 13 or the signal sending section 23.
    When the signal receiving section 13 and the signal sending section 23 are normal, the control section 15 detects a position deviation between the coils, namely, detects a state of overlap between the power supply coil 12 and the energy receiving coil 22, through the position perception section 152, and detects a foreign object present between the coils by the foreign object detection section 153, as said below. The following statement describes the control of detecting a position deviation between the coils, and the control of detecting a foreign object between the coils with reference to FIGS. 3 through 5. FIG. 3 shows a condition where the power supply coil 12 and the power receive coil 22 are facing each other without deviation in position, where FIG. 3A is a plan view, and FIGS. 3B and 3C are seen in perspective. FIG. 4 shows a condition where the power supply coil 12 and the power receive coil 22 face each other with a position deviation, where FIG. 4A is a plan view, and FIGS. 4B and 4C are seen in perspective. FIG. 5 shows a condition where a foreign object 40 is present in the power supply coil 12 with respect to FIG. 4, where FIG. 5A is a plan view, and FIGS. 5B and 5C are seen in perspective. The geometric axis X and geometric axis Y represent the direction of the surfaces of the power supply coil 12 and the power receiving coil 22, and the geometric axis Z represents the direction of the height.
    When the center point of the power supply coil 12 and the center point of the power supply coil 22 are identical to each other in the direction of the surfaces 5 of the power supply coil 12 and the power supply coil 22 as shown in FIG. 3, the distance from the signal sending antenna of the signal sending section 23 to each signal receiving antenna 13a, 13b, 13c, 13d of the signal receiving section 13 is equal to each other so that the value output signal received by the signal receiving antenna 13a, 13b, 13c, 13d is equal to each other. The output value of each signal receiving antenna 10a, 13b, 13c, 13d for the situation shown in FIG. 3 is represented by “S”.
    On the other hand, when the energy receiving coil 22 is deflected in the direction of the geometric axis X with respect to the energy supply coil 12 as shown in FIG. 4, the distance from the signal sending section 23 to the signal receiving antenna 13a, 13d becomes shorter than the distance from the signal sending section 23 to the signal receiving antenna 13b, 13c. The distance from the signal sending section 23 to the signal receiving antenna 13a, 13d is shorter than the distance from the signal sending section 23 to the signal receiving antenna 13a, 13b, 13c, 13d under the condition shown in FIG. 3, so that the output value of the signal receiving antenna 20a, 13d is greater than the output value S, and equal to S + 30, for example. On the other hand, the distance from the signal sending section 23 to the signal receiving antenna 13b, 13c is longer than the distance from the signal sending section 23 to the signal receiving antenna 13a, 13b, 13c, 13d under the condition shown in FIG. 3, so that the output value of the signal receiving antenna 13b, 13c is less than the output value S, and 25 equal to S - 30, for example.
    Consequently, the position perception section 152 perceives the relative position of the power receiving coil 22 with respect to the power supply coil 12 by comparing the output values of the signal receiving antennas 13a, 13b, 13c, 13d with the output value S as a reference, and calculates the deviation from the output value of each signal receiving antenna 13a, 13b, 13c, 13d.
    The following statement describes a control process for foreign object detection, which is performed by the foreign object detection section 153. As shown in FIG. 5, when a foreign object 40 is present near the signal receiving antenna 13a under a similar position relationship of the coils as shown in FIG. 4, the signal 35 sent from the signal sending section 13 to the signal receiving antenna 13a is interrupted by the foreign object 40 so that the output value of the signal receiving antenna 13a becomes less than the output value of the signal receiving antenna 13a under the condition shown in FIG. 4, (S + 30), and equal to S - 600, for example. On the other hand, the output values of the receiving antennas 13b, 13c, 13d are equal to S-30, S-30, S + 30, respectively, as in the case of FIG. 4.
    The foreign object detection section 153 obtains the absolute values of differences between the output values of the signal receiving antennas 13a, 13b, 13c, 13d, and compares the absolute value of each difference with a limit value, and when the difference greater than the limit value determines that a foreign object is present between the coils. The threshold value is a predetermined foreign object identification threshold value used to determine whether or not a foreign object is present. In this embodiment, the foreign object identification limit value is set to 60. In the examples shown in FIGS. 4 and 5, the output values of the signal receiving antennas 13a, 13b, 13c, 13d are represented by a, b, c, and d, respectively. In the example shown in FIG. 4, the absolute value of each difference is calculated by the foreign object detection section 153 as stated below. | b-a | = 60, | c-a | = 60, | d-a | = 0 | c-b | = 0, | d-b | = 60, e | d-c | = 60 The foreign object detection section 153 compares the absolute value of each difference with the foreign object identification limit value, and determines that each difference is less than or equal to the foreign object identification limit value (= 60), and thus, it determines that no foreign object is present between the power supply coil 12 and the power receive coil 22. On the other hand, in the example shown in FIG. 5, the absolute value of each difference is calculated by the foreign object detection section 153 as stated below. | b-a | = 570, | c-a | = 570, | d-a | = 630, | c-b | = 0, | d-b | = 60, e | d-c | = 60
    The foreign object detection section 153 compares the absolute of each difference with the foreign object identification limit value, and determines that the differences | b-a |, | c-a |, and | d-a | are greater than the foreign object identification threshold value, and thus, determines that a foreign object is present. Since the output value a is common among differences greater than the foreign object identification threshold value, the foreign object detection section 153 can determine that a foreign object is present near the signal receiving antenna 13a. In this way, the foreign object detection section 153 determines whether or not a foreign object is present between the power supply coil 12 and the power receive coil 22, and also determines the location of the foreign object. The control section 15 sends to the vehicle 200 through communication between the wireless communication section 14 and the wireless communication section 24 the relative position of the energy receiving coil 22 with respect to the power supply coil. energy 12 which is detected by the position perception section 152. In addition, the control section 15 sends a signal to the vehicle 200 through communication between the wireless communication section 14 and the wireless communication section 24, when a foreign object is detected by the tin object detection section 153.
    After completing the position perception control, the control section 15 and the load control section 25 perform the next load control. The load control section 25 calculates a load period based on information about the position deviation of the coil that is received by the wireless communication section 24. The efficiency of electricity transmission provided from the power supply coil energy 12 for the energy receiving coil 22 depends on the coupling coefficient between the energy supply coil 12 and the energy receiving coil 22, and the coupling coefficient depends on the position relationship between the energy supply coil 12 and the energy receiving coil 22. Consequently, the load control section 25 can calculate the energy received by the energy receiving coil 22, based on the energy sent from the energy supply coil 12, recognizing the relationship of position between the power supply coil 12 and the power receiving coil 22. In addition, the load control section 25 can calculate the charging period, based on the energy the charge corresponding to the energy received based on the deviation of the coil position, and the SOC of the battery 28 managed by the controller not shown. When a user decides to allow charging operation during the charging period calculated by charge control section 25, charge control section 25 then sends it to the electricity source device 100 through communication between the unused communication section of wire 14 and of the wireless communication section 24 a signal indicating a start of charge, in response to the user's operation. In response to the signal, the control section 15 initiates the loading operation. On the other hand, when the user decides not to allow the load operation during the load period calculated by the load control section 25, the user redo the parking in order to reduce the deviation of the coil position, and thereby shorten the load. charge period. When the battery 28 is fully charged, then the charge control section 25 sends from the wireless communication section 24 to the wireless communication section 14 a control signal indicating a charge termination, so that the control section 15 stops the load operation based on the control signal.
    When the load control section 25 receives from the wireless communication section 24 a signal indicating the detection of a foreign object, then the load control section 25 notifies the user of the presence of the foreign object through the controller not shown. The user can start charging after removing the foreign object based on the notification. When detecting a foreign object, the control section 15 does not carry out the loading operation.
    The following statement describes a control process performed by the non-contact electricity source system in accordance with the present embodiment, with reference to the 5 FIGS. 6 through 8. FIG. 6 is a flowchart showing a process for controlling the non-contact electricity source system in accordance with the present embodiment. FIG. 7 is a flowchart showing a process for controlling a remote communication control shown in FIG. 6. FIG. 8 is a flowchart showing a process for controlling a position perception control shown in FIG. 6.
    In Step S1, control section 15 and chart control section 25 perform a system check as a boot control. In Step S2, the control section 15 and the load control section 25 perform a remote communication control.
    With respect to the remote communication control in Step S2, the load control section 15 obtains the current position of the vehicle 200 by the GPS function of the controller not shown, in Step S21, as shown in FIG. 6. In Step S22, charge control section 25 determines whether or not the current position obtained is within the charge point of the electricity source device 100. When the current position is not within the charge point, the charging process control then returns to Step S21. When the current position is within the load point, the load control section 25 then initializes the wireless communication section 24 in Step S23.
    In Step S24, the control section 15 and the load control section 25 perform signal sending and receiving between the wireless communication section 14 and the wireless communication section 5 to establish a network connection. data, and determine whether or not a data connection has been established. When no data connection is established, the control process returns to Step S24 where the sending and receiving signal is redone between the wireless communication section 14 and the wireless communication section 5. When a connection data is established, load control section 25 sends vehicle ID 200 to electricity source device 100 in Step 30 S25. The control section 15 performs the authorization of the ID by verifying IDs contained in the signal received by the wireless communication section 14 against the IDs registered in the electricity source device 100.
    When the authorization of the ID fails, then the process of controlling this achievement is terminated. On the other hand, when the ID authorization is successful, the load control section 25 sends signals from the wireless communication section 24 at intervals of a predetermined period to inform that the vehicle 200 is approaching of the electricity source device 100, in Step S26. Control section 15 measures। the distance between the vehicle 200 and the electricity source device 100 for allowing the distance measurement section 151 to measure the electric field strength of the signal received by the wireless communication section 14. Then, in Step S27 , the control section 15 determines whether or not the electric field power of the received signal is greater than the vehicle approach limit value. When the power of the electric field of the received signal is less than or equal to the limit value of approach of the vehicle, it is determined that the approach of the vehicle 200 to the electricity source device 100 is insufficient to initialize the signal reception section 13 and the signal sending section 23 for detection of deviation of the coil position, and therefore, the control process returns to Step S26. On the other hand, when the power of the electric field of the received signal is greater than the limit value for approaching the vehicle, it is determined that the approach of the vehicle 200 to the electricity source device 100 is sufficient, and thus the process control returns to Step S3, so remote communication control is terminated.
    With respect to the position perception control in Step S3, the control section 15 initializes the signal reception section 13, and sends from the wireless communication section 14 to the wireless communication section 24 um signal indicating a start of the position perception control, in Step S31, as shown in FIG. 8. In Step S32, the load control section 25 initializes the signal sending section 23, depending on the signal sent in Step S31. In Step S33, the control section 15 measures the output values of the signals that are sent from the signal sending section 23 and received by the signal receiving antennas 13a, 13b, 13c, 13d from the signal receiving section 13 In Step S34, control section 15 determines whether or not the output value of each received signal is greater than the lower limit of the abnormality check, and less than the upper limit of the abnormality check.
    When the output values of the received signals are greater than the lower limit and less than the upper limit, then control section 15 calculates differences between the output values of the signals received by the signal receiving antennas 13a, 13b, 13c, 13d, in Step S35. In Step S36, the control section 15 makes the foreign object detection section 153 determine whether or not the absolute value of each difference in output value is less than or equal to the foreign object detection threshold value. When the absolute value of each output value difference is less than or equal to the foreign object detection limit value, the foreign object detection section 153 determines, in Step S37, that no foreign object is present between the power supply 12 and the power receiving coil 22. In Step S38, the control section 15 makes the position perception section 152 perceive the relative position of the power receiving coil 22 with respect to the power supply coil 12 based on the output values of the signal receiving antennas 13a, 13b, 13c, 13d which are measured in Step S33, and thus perceive a deviation of the position of the energy receiving coil 22 from the energy supply coil 12 , and sends the perception result to the vehicle 200, and then the control continues to Step S4 so that the position perception control is terminated.
    Referring again to Step S36, when the absolute values of the differences between the output values of the signal receiving antennas 13a, 13b, 13c, 13d are greater than the foreign object detection limit value, the foreign object 153 determines, in Step S361, that a foreign object is present. Then, in Step S362, the control section 15 sends to the vehicle 200 through the wireless communication section 14 a signal indicating the presence of the foreign object. The load control section 25 notifies the user of the presence of the foreign object, based on the signal received by the wireless communication section 24. When the foreign object is present, the control process of this embodiment is terminated without continuing for the control load in Step S4.
    Referring again to Step S34, when the output values of the signal receiving antennas 13a, 13b, 13c, 13d are less than the lower limit or greater than the upper limit, control section 15 determines that an abnormality it is present in the signal reception section 13 or in the signal sending section 23, in Step S341. Then, in Step S362, the control section 15 sends to the vehicle 200 through the wireless communication section 14 a signal indicating that the abnormality is present in the signal reception section 13 or in the signal sending section 23. The load control section 25 notifies the user of the presence of the abnormality, based on the signal received by the wireless communication section 24. When the abnormality is present in the signal reception section 13 or in the signal sending section 23, the process of controlling this embodiment is terminated without continuing to load control in Step S4.
    Referring again to FIG. 6, in Step S4, the load control section 25 calculates the load period based on information about the position deviation of the coil perceived by the position perception section 152 and the SOC of the battery 28, and notifies the user of the period of charge. Then, depending on the user's operation, the load control section 25 sends a signal indicating a start of charge to the electricity source device 100. When receiving the signal, the control section 15 then starts supplying electricity from the power supply coil 12 to the power receiving coil 22. At the beginning of the charge, the control section 15 paralyzes the power receiving section. signal 13, while charge control section 25 paralyzes signal sending section 23. Then, when battery 28 is fully charged, control section 15 paralyzes the electricity supply, and ends the charge control of this concretization.
    As described above, the present embodiment is provided with the signal sending section 23 and the signal receiving antennas 13a, 13b, 13c, 13d, and perceives, with the position perception section 152, the position relationship between the power supply coil 12 and the power receiving coil 22 based on the output values of the signal receiving antennas 13a, 13b, 13c, 13d, and detects with the foreign object detection section 153 a foreign object between the power supply coil 12 and power receive coil 22 based on a comparison result between the output values of the signal receiving antennas 13a, 13b, 13c, 13d. This aspect of the present embodiment makes it possible to detect a foreign object between the coils by using the signal sending section 23 and the signal receiving antennas 13a, 13b, 13c, 13d which are sensors to perceive the position relationship between the coil of power supply 12 and power receiving coil 22. This eliminates the need to provide an additional sensor for foreign object detection. The present embodiment makes it possible to remove a foreign object between the coils by detecting the foreign object, and notifying the user or the like about the presence of the foreign object, and thereby making it possible to prevent the foreign object from producing heat due to the supply of electricity without contact. The aspect of the present embodiment in which foreign object detection is implemented with several sensors makes it possible to identify the location of the foreign object.
    In the present embodiment, the foreign object detection section 153 is designed to detect a foreign object based on the differences between the output values of the signal receiving antennas 13a, 13b, 13c, 13d. The aspect in which the differences are obtained between the output values of the signal receiving antennas 13a, 13b, 13c, 13d serves to cancel the deviation of the output values due to the deviation of the coil position and thereby improve the accuracy of the foreign object detection.
    In this embodiment, when a foreign object is detected by the foreign object detection section 153, the perception of the coil position is not performed by the position perception section 152. However, when a foreign object is present in a position significantly closer to one of the signal receiving antennas 13a, 13b, 13c, 13d than other signal receiving antennas, the position relationship between the power supply coil 12 and the power receive coil 22 can be perceived by the position perception 152 based on the output values of the three remaining signal receiving antennas. This makes it possible to obtain both the perception of the deviation of the coil position and the detection of foreign object, and thereby provide a more convenient non-contact electricity source system.
    Although the signal receiving section 13 is composed of four antennas in the present embodiment, the signal receiving section 13 is not limited to this configuration, but can be composed of several antennas other than four. The signal receiving section 12 does not need to be provided on the ground side, but it can be provided on the vehicle 200. The signal sending section 23 does not need to be provided on the vehicle 200, but it can be provided on the ground side. In the present embodiment, the signal sending antenna of the signal sending section 23 and the signal receiving antennas 13a, 13b, 13c, 13d of the signal receiving section 13 constitute the various sensors. However, the various sensors do not need to be made up of the pair of signal sending section 23 and signal receiving section 13, but they can be made up of sensors provided only on the ground side and on the vehicle side 200. For example, detection of foreign object and the perception of position of the coil can be implemented by providing several infrared sensors on the ground side, infrared sensors that emit light towards the vehicle 200, and refer to the reflected infrared light power.
    Although the foreign object detection section 153 detects a foreign object based on the differences between the output values of the signal receiving antennas 13a, 13b, 13c, 13d in the present embodiment, the foreign object detection section 153 can detect a foreign object by processing the output values of the signal receiving antennas 13a, 13b, 13c, 13d by multiplication, addition, or subtraction, and comparing the results of the calculations.
    In the present embodiment, the foreign object detection section 153 can perform foreign object detection, while electrical power is being supplied from the power supply coil 12 to the power receiving coil 22. When the section foreign object detection device 153 detects a foreign object during the power supply, the control section 15 then stops sending electricity from the power supply coil 12, and notifies the vehicle 200 via wireless communication of the event in which the foreign object is present.
    Since the distance measurement based on communication between the wireless communication section 14 and the wireless communication section 24 is greater in unit of measurement than the perception of deviation of the coil position based on the co -communication between the signal receiving section 13 and the signal sending section 23, the communication cycle between the wireless communication section 14 and the wireless communication section 24 can be established longer than the communication cycle between the signal receiving section 13 and the signal sending section 23. The amount of data sent by the communication between the signal receiving section 13 and the signal sending section 23 may be small, due to the bidirectional control signal communication is not performed between signal reception section 13 and signal sending section 23 as between wireless communication section 14 and wireless communication section 24. However, it is preferable to perform a p check during the system check, in order to improve the accuracy of position deviation between the coils.
    The position perception section 152 can perform the position perception of the coil, while electrical power is being supplied from the power supply coil 12 to the power receiving coil 22. For example, the control section 15 can be controlled to stop the electricity supply for a predetermined period after executing the electricity supply, and perceive the position of the coils through the position perception section 152 while the electricity supply is being stopped, and after perception, restart the supply of electricity. This makes it possible to confirm whether the deviation of the coil position occurs or not during the supply of electrical energy.
    Although the distance between the vehicle 200 and the electricity source device 100 is measured based on the signal strength received by the wireless communication section 14, it can be measured based on a time difference around the received signal or something like that. As a communication device for remote communication for distance measurement, a sensor can be provided, which directly measures the distance between the vehicle 200 and the electricity source device 100.
    One of the power supply coil 12 and the power receiving coil 22 corresponds to the first coil of the present invention, while the other coil corresponds to the second coil of the present invention. The signal sending section 23 and the signal receiving antennas 13a, 13b, 13c, 13d of the signal receiving section 13 c cor-respond to the various sensors of the present invention. The position perception section 152 corresponds to the position perception device of the present invention. The foreign object detection section 153 corresponds to the foreign object detection device of the present invention.
    权利要求:
    Claims (2)
    [0001]
    1. Non-contact electricity source system (100), comprising: a second coil (12, 22) adapted to send or receive electricity to or from a first coil (12, 22) in a non-contact manner at least through action -magnetic plate between them; several sensors configured to perceive a position deviation between the first coil (12,22) and the second coil (12, 22), in which the various sensors include a signal emission section (23) being composed of an antenna emitting single signal which is provided at the central point of the signal emission section (23) and a signal reception section (13), which is composed of several signal reception antennas (13a, 13b, 13c, 13d), and which the signal emitting section (23) and the signal receiving section (13) are arranged so that the distance between the position of each signal receiving antenna (13a, 13b, 13c, 13d) and the position of the section signal emission (23) is equal to each other if a central point of the first coil (12, 22) and a central point of the second coil (12, 22) are identical to each other in the direction of the plane of the coils; a position perception device (152) configured to compare output values of the various signal receiving antennas (13a, 13b, 13c, 13d) with a predetermined reference value, and to perceive a position relationship between the first coil ( 12, 22) and the second coil (12, 22); and FEATURED by the fact that it additionally comprises a foreign object detection device (153) configured to obtain absolute values of differences between the output values of the various signal receiving antennas (13a, 13b, 13c, 13d), to compare each difference with a predetermined threshold value for foreign object detection, and to detect whether or not a foreign object is present between the first coil (12, 22) and the second coil (12, 22) based on a comparison result.
    [0002]
    2. Non-contact electricity source system (100), according to claim 1, CHARACTERIZED by the fact that: the various sensors (13a, 13b, 13c, 13d) include four sensors; and the position perception device (152) is adapted to detect the position relationship between the first coil (12,22) and the second coil (12, 22) based on the output values of at least three of the sensors (13a, 13b, 13c, 13d).
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    同族专利:
    公开号 | 公开日
    EP2717430A4|2015-09-02|
    EP2717430B1|2018-06-20|
    JP2012249403A|2012-12-13|
    EP2717430A1|2014-04-09|
    MY165543A|2018-04-03|
    CN103563215B|2016-05-04|
    WO2012164973A1|2012-12-06|
    KR101574000B1|2015-12-02|
    CN103563215A|2014-02-05|
    KR20140025527A|2014-03-04|
    MX2013013890A|2014-01-24|
    US20140145514A1|2014-05-29|
    RU2598896C2|2016-10-10|
    RU2013158189A|2015-07-10|
    JP5793963B2|2015-10-14|
    US9656559B2|2017-05-23|
    BR112013029933A2|2017-12-05|
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    法律状态:
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-08-06| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-09-24| B15K| Others concerning applications: alteration of classification|Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H02J 17/00 , B60L 11/18 , H02J 7/00 Ipc: H02J 50/60 (2016.01), B60L 3/00 (2019.01), H01F 38 |
    2020-12-22| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-02-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 08/02/2012, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2011118665A|JP5793963B2|2011-05-27|2011-05-27|Non-contact power feeding device|
    JP2011-118665|2011-05-27|
    PCT/JP2012/052804|WO2012164973A1|2011-05-27|2012-02-08|Non-contact power supply device|
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