• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Abstract A device and a method for enabling secure wireless transfer of energy from a charging station in a roadway to a vehicle, wherein the device includes a plurality of sensors configured to generate a detection field in a certain pattern underneath the vehicle for sensing a metallic object, and a control unit, wherein the control unit is configured to: provide authentication data of an authentication between the vehicle and the charging station; determine a distance d between the charging station and the vehicle, and compare the distance with a threshold distance dt; generate activation data to the plurality of sensors in order to activate the detection field when the distance between the vehicle and the charging station is equal to or less than the threshold distance dt and before any transfer of energy is started; monitor if any metallic object is in the detection field; generate control data for controlling transfer of energy from the charging station to the vehicle in dependence of the monitoring and the authentication data. (Figure 2)
    公开号:SE1451089A1
    申请号:SE1451089
    申请日:2014-09-17
    公开日:2016-03-18
    发明作者:André Claesson；Kenneth Lindgren
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    2 US2012 / 0181875, a stationary unit is described which has a device for detecting the presence of an electrically conductive object in an area for inductive transfer of electric energy. Measuring coils cover the transfer area to sense any electrically conductive object in the area.
    The above-mentioned systems concern charging a vehicle at a stationary charging station, where the energy transfer is made over a rather large period of time. When larger amounts of energy are to be transferred, e.g. when the charging station is embedded in the roadway and the vehicle shall be charged in a short time, more care has to be taken to ensure that no metallic objects are near the charging zone.
    Summary of the invention lt is thus an object of the invention to alleviate at least some of the drawbacks with the prior art. lt is a further object of the invention to achieve a device and a method that enables secure wireless transfer of energy from a charging station in a roadway to a vehicle. lt is a still further object to be able to detect metallic objects that come underneath the vehicle before or during charging. lt may be possible to charge the vehicle during a longer period of time, because it is possible to have control of the space underneath the vehicle before and during charging and there is less need for a security margin.
    The device includes a plurality of sensors configured to generate a detection field in a certain pattern underneath the vehicle for sensing a metallic object. The device further includes a control unit. The control unit is configured to: - provide authentication data of an authentication between the vehicle and the charging station; - determine a distance d between the charging station and the vehicle, and compare the distance with a threshold distance dt; 3 - generate activation data to the plurality of sensors in order to activate the detection field when the distance between the vehicle and the charging station is equal to or less than the threshold distance dt and before any transfer of energy is started; - monitor if any metallic object is in the detection field; - generate control data for controlling transfer of energy from the charging station to the vehicle in dependence of the monitoring and the authentication data.
    According to one embodiment, the control unit is configured to generate activation data to activate the detection field only if the authentication data reveals that the vehicle is positively authenticated to be charged from the charging station.
    According to one embodiment, the threshold distance d1 is equal to the length of a vehicle, or a set length of at least the length of the vehicle.
    According to one embodiment, the plurality of sensors includes inductive sensors and / or capacitive sensors.
    According to one embodiment, the detection field is configured to have a shape of a fence when generated.
    According to one embodiment, the vehicle is equipped with a receiver unit configured to receive energy from the charging area, and wherein the detection field is configured to have a shape of a fence that at least partly encircles the receiver unit.
    According to one embodiment, the detection field is configured to have a width w and to extend at least partly around the circumference of the vehicle.
    According to one embodiment, the detection field is configured to have a height h extending between at least one of the plurality of sensors and a roadway of the vehicle.
    According to one embodiment, the control unit is configured to generate control data allowing transfer of energy to the vehicle if at least one charging condition is fulfilled.
    According to one embodiment, the charging conditions includes: authentication data that reveals that the vehicle is positively authenticated to be charged from the charging station; the vehicle is within a certain distance from the charging station; an activated detection field.
    According to one embodiment, the control unit is configured to generate control data preventing transfer of energy to the vehicle from the charging station if any metallic object is detected in the detection field.
    According to one embodiment, the control unit is configured to generate a notification signal to the driver and / or a central unit if any metallic object is detected in the detection field.
    The method for enabling secure wireless transfer of energy from a charging station in a roadway to a vehicle, wherein the vehicle is equipped with a plurality of sensors configured to generate a detection field in a certain pattern underneath the vehicle for sensing a metallic object, comprises : - performing an authentication between the vehicle and the charging station; - activating the detection field when a distance d between the vehicle and the charging station is equal to or less than a threshold distance dt and before any transfer of energy is started; - monitoring if any metallic object is in the detection field; - controlling transfer of energy from the charging station to the vehicle in dependence of the monitoring and the authentication.
    According to one embodiment, the method comprises activating the detection field only if the vehicle is positively authenticated to be charged from the charging station.
    According to one embodiment, the method comprises transferring energy to the vehicle if at least one charging condition is fulfilled.
    According to one embodiment, the charging conditions include: a positive authentication of the vehicle to be charged from the charging station; the vehicle is within a certain distance from the charging station; and the detection field is activated.
    According to one embodiment, the method comprises preventing transfer of energy to the vehicle from the charging station if any metallic object is detected by the detection field.
    According to one embodiment, the method comprises notifying the driver and / or a central unit if any metallic object is detected by the detection field.
    According to a further aspect, the invention relates to a computer program P, wherein the computer program P includes a computer program code to cause a control unit, or a computer connected to the control unit, to perform the method according to any of the steps herein.
    According to a still further aspect, the invention relates to a computer program product comprising a computer program code stored on a non-transitory computer-readable medium to perform the method steps according to any of the steps as disclosed herein, when the computer program code is executed by a control unit or by a computer connected to the control unit. According to another aspect, the invention relates to a system comprising the device and a charging station configured for wireless transfer of energy from the charging station to the vehicle.
    According to one embodiment, the vehicle includes a distance detector configured to measure a distance between the vehicle and the charging station.
    According to one embodiment, the vehicle and the charging station are configured to communicate with each other in a wireless way.
    According to still another aspect, the invention relates to a vehicle comprising the device according to any of the embodiments as described herein.
    Preferred embodiments are described in the dependent claims and in the detailed descnp On.
    Short description of the appended drawinqs Below the invention will be described with reference to the accompanying figures, of which: Fig. 1 shows an electric vehicle with a receiver area for wireless transfer of energy from a charging station embedded in the roadway according to one embodiment .
    Fig. 2 shows the electric vehicle and charging station in Fig. 1 seen from above according to one embodiment.
    Fig. 3 illustrates a control unit according to one embodiment of the invention.
    Fig. 4A illustrates a side view of a part of the electric vehicle of Fig. 1 and 2, and the height h of the detection field according to one embodiment.
    Fig. 4B illustrates a view from above of a part of the electric vehicle of Fig. 1 and 2, and the width w of the detection field according to one embodiment.
    Fig. 5 illustrates a flow chart of a method of the invention according to one embodiment.
    Detailed description of preferred embodiments of the invention 7 ln Fig. 1 an electric vehicle 1 traveling on a roadway 5 is illustrated. The traveling direction is illustrated by the arrow 14. The electric vehicle 1, hereafter called the vehicle 1, may be any kind of vehicle arranged to be electrically charged in a wireless way. For example, the vehicle 1 may be a private car, a truck, a lorry, a bus or any other kind of industrial or working vehicle. The vehicle 1 has a plurality of wheels 2. The vehicle 1 is further equipped with a receiver unit 3 for receiving energy in a wireless way. The receiver unit 3, also called a “pick up”, is located in the bottom part of the vehicle 1. A charging station 6 for wireless transfer of energy is also shown embedded in the roadway 5. The charging station 6 may transfer energy to the receiver unit 3 when certain conditions have been fulfilled.
    The receiver unit 3 may be configured to be lowered to facilitate charging from the charging station 6. When no charging is in progress, the receiver unit 3 may be raised again to protect the receiver unit 3.
    The vehicle 1 and the charging station 6 may be arranged to communicate in a wireless way, as illustrated with bent arrows in the figure. The vehicle 1 and the charging station 6 may be arranged to communicate directly with each other. One kind of such wireless communication is referred to as vehicle-to-vehicle communication (V2V). The vehicle 1 and the charging station 6 may also be arranged to communicate with each other via an external computer 8, server, road side unit or similar. One kind of such wireless communication is referred to as vehicle-to-infrastructure communication (V2l). The wireless communication may also be conducted via mobile communication servers, via an application in a communication unit or via a server. The vehicle 1 is for the purpose of wireless communication equipped with a unit for wireless communication 4. The charging station 6 is for the purpose of wireless communication also equipped with a unit for wireless communication 7.
    The receiver unit 3 may include a charging plate (not shown) to receive the energy from the charging station 6. The charging plate may be an inductive energy charging plate, thus capable of receiving energy via induction. The received energy is then transferred to a battery arrangement (not shown) of the 8 vehicle 1 for charging the vehicle 1, either directly or via an energy management unit (not shown) of the vehicle 1. The energy management unit may include e.g. an AC / DC-rectifier (not shown) to convert the energy to a suitable format for the battery arrangement and the vehicle 1. The charging station 6 may include a charging plate (not shown) connected to a power supply (not shown). The charging station 6 may also include a control unit 25 that is configured to start energy transfer from the charging station 6, stop energy transfer from the charging station 6, and / or regulate the effect of the energy transfer from the charging station 6. The charging station 6 and the vehicle 1 may exchange data for authentication via the units for wireless communication 4, 7 such that a correct amount of energy can be transferred. ln Fig. 2 a view from above of the vehicle 1, the road way 5 and the charging station 6 is shown. The vehicle 1 is here arranged with a device 19 for enabling secure wireless transfer of energy from the charging station 6 in the roadway 5 to the vehicle 1. A system may include the device 19 and the charging station 6. The device 19 includes a plurality of sensors 9. The sensors 9 are configured to generate a detection field in a certain pattern underneath the vehicle 1 for sensing a metallic object. When a metallic object is sensed, the sensor 9 detecting the object sends detection data to the control unit 10. The control unit 10 may thus know an approximate position of the detected metallic object. The sensors 9 may be inductive sensors and / or capacitive sensors. Thus, the plurality of sensors 9 may according to one embodiment only comprise inductive sensors. According to another embodiment, the plurality of sensors 9 may only comprise capacitive sensors. According to another embodiment, the plurality of sensors 9 includes a mix of inductive sensors and capacitive sensors. The sensors 9 are connected to and energized via an electrical system of the vehicle 1 (not shown). The sensors 9 thus act as metal detectors.
    The device 19 further includes a control unit 10. The control unit 10 is further illustrated in Fig. 3, and includes a processing unit 15 and a memory unit 16. The processing unit 15 may be made up of one or more Central Processing Units 9 (CPU). The memory unit 16 may be made up of one or more memory units. A memory unit may include a volatile and / or a non-volatile memory, such as a flash memory or Random Access Memory (RAM). The control unit 10 further includes a computer program P including a computer program code to cause the control unit, or a computer connected to the control unit 10, to perform any of the method steps that will be described in the following. The control unit 10 may be an Electronic Control Unit (ECU).
    The control unit 10 is configured to provide authentication data of an authentication between the vehicle 1 and the charging station 6. The authentication means that the vehicle 1, charging station 6 and / or the external computer 8 performs an authentication procedure, where data of the vehicle charging needs, identification data etc of the vehicle 1 may be “hand shaken” with the charging station 6. Thus, it may be identified if the vehicle 1 is an electric vehicle that is in need for charging, if the charging station 6 is compatible with the receiving unit 3 for transfer of energy between the charging station 6 and the receiving unit, how much energy that should be transferred and / or during how long time the energy should be transferred etc. Various parameters such as the velocity of the vehicle 1 may aid in authentication procedure. The velocity of the vehicle 1 may also be transmitted to the charging station 6 such that the charging station 6 may prepare charging of the vehicle 1. From the authentication procedure authentication data is retrieved. The authentication data may e.g. include data describing that the vehicle 1 is positively authenticated to be charged from the charging station 6. This means that the charging station 6 may charge the vehicle 1. The authentication data may instead include data describing that the vehicle 1 is negatively authenticated to be charged from the charging station 6. This means that the charging station 6 cannot or will not charge the vehicle 1.
    The authentication procedure may start when the vehicle 1 is at a certain distance from the charging station 6. The distance between the vehicle 1 and the charging station 6 may be determined and monitored as indicated below. 10 The control unit 10 is further configured to determine a distance d between the charging station 6 and the vehicle 1. The control unit 10 is configured to compare the distance with a threshold distance dt. The threshold distance dt is according to one embodiment equal to the length of the vehicle 1, or a set length of at least the length of the vehicle 1. The length of the vehicle 1 may be a known parameter to the control unit 10. The distance d may be determined based on data of the position of the vehicle 1 and the position of the charging station 6, and by calculating the relative distance between the vehicle 1 and the charging station 6 by using their positions, respectively. The detection field should be activated at least a length of the vehicle 1 before the charging station 6 to search for metallic objects in the area where the vehicle 1 will drive over before charging.
    The position of the vehicle 1 may be determined with a positioning unit 20 in the vehicle 1. The positioning unit 20 is arranged to determine the position of the vehicle 1, and may be configured to receive signals from a global positioning system such as GNSS ( Global Navigation Satellite System), for example GPS (Global Positioning System), GLONASS, Galileo or Compass. Alternatively the positioning unit 20 may be configured to receive signals from for example one or several distance detectors in the vehicle 1 that measure relative distances to for example a road side unit, nearby vehicles or similar with a known position. Based on the relative distance or distances the positioning unit 20 may determine the position of the own vehicle 1. A detector may also be configured to detect a signature in for example a road side unit, whereby the signature represents a certain position. The positioning unit 20 may then be configured to determine its own position via detection of the signature. The positioning unit 20 may instead be configured to determine the signal strength in one or a plurality of signals from a base station or road side unit with known position, and thereby determine the position of the vehicle 1 by using triangulation. Of course may some of the above mentioned technologies be combined to ensure a correct position determination of the vehicle 1. The positioning unit 20 is configured to generate a position signal with the position of the vehicle 1, and to send it to the control unit 10. ll The position of the charging station 6 may be a known position to the charging station 6, the external computer 8 and / or the vehicle 1 (and thereby known to the control unit 10).
    The vehicle 1 may also be equipped with one or several distance detectors 11 configured to measure a distance between the vehicle 1 and a certain point or mark 21 on the charging station 6, located for example on an outer edge of the charging station 6 facing the traffic in the lane. The distance sensor 11 may e.g. include a camera unit, a radar unit or a laser unit. The distance detector 11 may also include performing some kind of identification of the charging station 6, e.g. that the certain point or mark 21 is identified. The distance detector 11 is configured to generate a distance signal with the distance d between the vehicle 1 and the charging station 6, and to send it to the control unit 10.
    The control unit 10 is further configured to generate activation data to the plurality of sensors 9 in order to activate the detection field when the distance between the vehicle 1 and the charging station 6 is equal to or less than the threshold distance dt and before any transfer of energy is started. The control unit 10 thus monitors the distance between the vehicle 1 and the charging station 6. When the sensors 9 are activated by the activation data, the detection field is turned on and the sensors 9 starts to detect if any metallic objects are within the field . As previously explained, the sensors 9 may be inductive, capacitive or a mix of inductive or capacitive. ln any case, will a metallic object in the detection field cause a disturbance in the field that is detected by the sensors 9, and sent as detection data to the control unit 10. The control unit 10 monitors the detection data from the sensors 10, and determines if a metallic object has been detected or not. The detection data may also include data of the specific sensor or sensors 9 that detected the metallic object. Then the position of any detected object may be determined by the control unit 10.
    The control unit 10 is further configured to generate control data for controlling transfer of energy from the charging station 6 to the vehicle 1 in dependence of 12 the monitoring and the authentication data. According to one embodiment, the control unit 10 is configured to generate control data allowing transfer of energy to the vehicle 1 if at least one charging condition is fulfilled. The charging conditions may include: authentication data that reveals that the vehicle 1 is positively authenticated to be charged from the charging station 6; the vehicle 1 is within a certain distance from the charging station 6; an activated detection field.
    Thus, if a metallic object is detected, no transfer of energy is allowed at this charging station 6. The control unit 10 may observe any disturbance in the detection data, and determine that a metallic object is underneath the vehicle 1.
    The control unit may thus be configured to generate control data preventing transfer of energy to the vehicle from the charging station if any metallic object is detected in the detection field. Thus, an ongoing transfer of energy may be interrupted, or a planned transfer of energy never started. The control data may according to one embodiment be sent wirelessly to the charging station 6 in order to interrupt any ongoing or planned transfer of energy. lf no metallic object is detected, the transfer of energy may be allowed. Further, the authentication process has to give authentication data that allows the vehicle 1 to be charged by the charging station 6. Othen / vise no charging may be allowed.
    The device 19 may comprise further detectors 12A, 12B, 13 that are arranged on the vehicle 1 at certain positions, e.g. at a front end of the receiving unit 3 (12A), at a rear end of the receiving unit 3 (12B) and / or at the rear end of the vehicle 1 (13). These detectors 12A, 12B, 13 may be detectors that are configured to sense the position of the mark 21 that points out the position of the charging station 6.
    The detectors 12A, 12B, 13 may include a camera unit, a laser unit or a radar unit to identify the mark 21. When any of the detectors 11, 12A, 12B, 13 is aligned or in any other sense is positioned in relation to the mark 21, an event may be triggered. For example, the charging may start when the detector 12A at the front end of the receiving unit 3 and the mark 21 are aligned, and stop when the detector12B at the rear end of the receiving unit 3 and the mark 21 are aligned, or when the detector 13 at the rear end of the vehicle 1 and the mark 21 are 13 aligned. The detection field may be de-activated when the detector 12B at the rear end of the receiving unit 3 and the mark 21 are aligned, or when the detector 13 at the rear end of the vehicle 1 and the mark 21are aligned. The mark 21 may be arranged with a detector 24 in the charging station 6 to control transfer of energy.
    The detector 24 may be the same kind of detector as the previously mentioned detectors, and may be configured to sense the position of any of the detectors 12A, 12B, 13 or other marking to indicate the position of the detectors 12A, 12B, 13, and to give data to the charging station 6 in order to activate or deactivate energy transfer from the charging station 6. The device 19 may send data to the charging station 6 via wireless communication to control the charging, and / or the charging station 6 may send data to control the charging via wireless communication. lf a metallic object is detected by the detection field, a notification may be sent to the driver of the vehicle 1 and / or to a central unit (not shown) to inform that there is a metallic object on the roadway 5. The control unit 10 may thus be configured to generate a notification signal with a notification to the driver and / or a central unit if any metallic object is detected in the detection field. The notification signal may be sent wirelessly from the vehicle 1 to the central unit. The notification may include information of the size of the object and / or the position of the object. The position of the object may be approximated to the position of the vehicle 1. The notification may be notified to the driver via an indicating unit 23 in the vehicle 1, e.g. via a screen on the dashboard, a load speaker or similar. The notification may thus be visual, audial or tactile.
    According to one embodiment, the control unit 10 is configured to generate activation data to activate the detection field only if the authentication data reveals that the vehicle 1 is positively authenticated to be charged from the charging station 6. Thus, if the authentication data describes that the vehicle 1 is not allowed to be charged by the charging station 6, the detection field is not activated as no monitoring of metallic objects has to be made. 14 The detection field is according to one embodiment configured to have a shape of a fence when generated. The sensors 9 are distributed on the underside 26 of the chassis and / or body of the vehicle 1. The sensors 9 are arranged to send out the detection field such that it gets a certain pattern. The detection field is according to one embodiment configured to have a shape of a fence that at least partly encircles the receiver unit 3. Thus, the sensors 9 are configured to send out such a detection field. The detection field is according to one embodiment configured to completely, to a greater extent or at least partly extend around the circumference of the vehicle 1. As illustrated in figure 2, the sensors 9 illustrated as triangles are distributed at the bottom sides of the vehicle 1, and along the bottom front and bottom rear part of the vehicle 1. The sensors 9 may also send out a detection field that covers an area inside the wheels 2 of the vehicle 1. The sensors 9 may then be distributed also along the bottom side of the vehicle 1 closest to the inner side of the wheels 2. One sensor 9 may transmit a detection field covering a whole side of the vehicle 1 underneath the vehicle 1. instead of a plurality of sensors 9 may transmit a detection field covering a whole side of the vehicle 1 underneath the vehicle 1. ln Fig. 4A a side view of the space underneath the vehicle 1 is shown, and in Fig. 4B the space is illustrated from above. Sensors 9 are located facing down from the vehicle 1 to the roadway 5. When the sensors 9 are active, they will generate a detection field bordering the bottom side 17 of the vehicle 1 and the roadway 5.
    As illustrated in the figures, the detection field generated by the sensors 9 has a height h and a width w. Fig. 4B, the width w of the detection field extends from the outer side 18 of the vehicle 1 and towards the center of the vehicle 1. The width w may according to one embodiment be from some millimeters up to 0.5 m. The height h extends between the bottom side 17 of the vehicle 1 and the roadway 5 of the vehicle 1. The sensors 9 are here located aligned with the bottom side 17 of the vehicle 1, and the height h thus extends from the bottom side 17 of the vehicle 1 to the roadway 5. The space between the receiver unit 3 and the roadway 5 is however not covered to any extent by the detection field.
    The detection field thus creates a fence of detection underneath the vehicle 1 encirciing the receiver unit 3 to monitor if the vehicle 1 gets a metallic object under the vehicle 1 when driving over an object, or if any metallic object is thrown into the space between the bottom part 17 (Fig. 4A) of the vehicle 1 and the road way of the vehicle 1.
    The detection field may be calibrated for different positions of the wheels 2 of the vehicle 1, as the wheels 2 of the vehicle 1 may come into the detection field and otherwise erroneously trigger detection of a metallic object. lf the control unit 10 knows how the wheels 2 disturb the detection field, the detection of the wheels 2 in the field may be neglected in the detection data. For example, the detection field may be calibrated for different wheel positions, such that the wheels do not disturb the detection of any metallic object. The detection field may also be calibrated for different steering angles etc., in which steering angles the wheels 2 will come into the detection field to different extent. The detection field may e.g. be calibrated in the factory when manufacturing the vehicle 1.
    The device 19 may also retrieve data from other sensors or detectors in the vehicle 1, such as a detector 22 configured to detect large objects, especially non-metallic objects, which may damage the receiver unit 3, in the driving direction of the vehicle 1 .lf a large object is detected, the receiver unit 3 may be raised, and no charging may be performed. The driver and / or central station may be sent a notification of the large object and the position of the object.
    The vehicle 1 communicates internally between its units, devices, sensors, detectors etc. via a communication bus, for example a CAN-bus (Controller Area Network) which uses a message based protocol. Examples of other communication protocols that may be used are TTP (Time-Triggered Protocol), Flexray, etc. ln that way signals and data described herein may be exchanged between different units, devices, sensors and / or detectors in the vehicle 1. Signals and data may instead be transferred wirelessly between the different units, devices, sensors and / or detectors. 16 The invention also relates to a method, which will now be described with reference to the flowchart in Fig. 5. The method may be implemented as program code and saved in the memory unit 16 in the control unit 10 (Fig. 3). The method may thus be implemented with the above described hardware of the device 19 (Fig. 2) in the vehicle 1. The method comprises performing an authentication between the vehicle 1 and the charging station 6 (A1). As previously described, the authentication may be initiated when the vehicle 1 is a certain distance, or within a certain distance from the charging station 6. The authentication is made with an authentication process which may provide authentication data that describes if the vehicle 1 can and / or will be allowed to be charged from the charging station 6 or not. The authentication may include transfer of wireless data between the vehicle 1, the charging station 6 and / or the external computer unit 8 (Fig. 1). For example, when the charging station 6 has been detected by the device 19, or vice versa, a request may be sent from the vehicle 1 to the charging station 6 for charging. Data about the vehicle 1, such as amount of energy needed, length of the vehicle 1, velocity, type of vehicle 1 etc. may be sent to the charging station 6.
    The charging station 6 may evaluate the received data and determine if the vehicle 1 may be charged, and data of the charging such as duration of the charging and how much energy that should be transferred. An acknowledgment may then be sent to the vehicle 1 from the charging station 6 with the result of the evaluation. This authorization process may instead be made by the control unit 10 or in the external computer unit 8.
    The method also includes activating the detection field when the distance d between the vehicle 1 and the charging station 6 is equal to or less than a threshold distance dt and before any transfer of energy is started (A2). The distance d between the vehicle 1 and the charging station 6 is thus monitored.
    The detection field may only be activated if the vehicle 1 is positively authenticated to be charged with energy from the charging station 6. lt is further monitored if any metallic object is in the detection field (A3), and transfer of 17 energy from the charging station 6 to the vehicle 1 is controlled in dependence of the monitoring and the authentication (A4).
    According to one embodiment, the method comprises allowing transfer of energy to the vehicle 1 if at least one charging condition is fulfilled. The charging conditions may include: a positive authentication of the vehicle 1 to be charged from the charging station 6; the vehicle 1 is within a certain distance from the charging station 6; and the detection field is activated.
    The present invention is not limited to the above-described preferred embodiments. Various alternatives, modifications and equivalents may be used.
    Therefore, the above embodiments should not be taken as limiting the scope of the invention, which is defined by the appending claims.
    权利要求:
    Claims (30)
    [1] 1. provide authentication data of an authentication between the vehicle (1) and the charging station (6); 2. determine a distance d between the charging station (6) and the vehicle (1), and compare the distance with a threshold distance dt; 3. generate activation data to the plurality of sensors (9) in order to activate the detection field when the distance between the vehicle (1) and the charging station (6) is equal to or less than the threshold distance dt and before any transfer of energy is started; - monitor if any metallic object is in the detection field; 4. generate control data for controlling transfer of energy from the charging station (6) to the vehicle (1) in dependence of the monitoring and the authentication data.
    [2] 2. The device (19) according to claim 1, wherein the control unit (10) is configured to generate activation data to activate the detection field only if the authentication data reveals that the vehicle (1) is positively authenticated to be charged from the charging station (6).
    [3] 3. The device (19) according to claim 1 or 2, wherein the threshold distance d1 is equal to the length of a vehicle (1), or a set length of at least the length of the vehicle (1).
    [4] 4. The device (19) according to any of the preceding claims, wherein the plurality of sensors (9) includes inductive sensors and/or capacitive sensors.
    [5] 5. The device (19) according to any of the preceding claims, wherein the detection field is configured to have a shape of a fence when generated. 19
    [6] 6. The device (19) according to claim 5, wherein the vehicle (1) is equipped with a receiver unit (3) configured to receive energy from the charging area (6), and wherein the detection field is configured to have a shape of a fence that at least partly encircles the receiver unit (3).
    [7] 7. The device (19) according to claim 6, wherein the detection field is configured to have a width w and to extend at least partly around the circumference of the vehicle (1).
    [8] 8. The device (19) according to claim 6 or 7, wherein the detection field is configured to have a height h extending between at least one of the plurality of sensors (9) and a roadway (5) of the vehicle (1).
    [9] 9. The device (19) according to any of the preceding claims, wherein the control unit (10) is configured to generate control data allowing transfer of energy to the vehicle (1) if at least one charging condition is fulfilled.
    [10] 10. The device (19) according to claim 9, wherein the charging conditions includes: authentication data that reveals that the vehicle (1) is positively authenticated to be charged from the charging station (6); the vehicle (1) is within a certain distance from the charging station (6); an activated detection field.
    [11] 11. The device (19) according to any of the preceding claims, wherein the control unit (10) is configured to generate control data preventing transfer of energy to the vehicle (1) from the charging station (6) if any metallic object is detected in the detection field.
    [12] 12. The device (19) according to any of the preceding claims, wherein the control unit (10) is configured to generate a notification signal to the driver and/or a central unit if any metallic object is detected in the detection field.
    [13] 13. Method for enabling secure wireless transfer of energy from a charging station (6) in a roadway (5) to a vehicle (1), wherein the vehicle (1) is equipped with a plurality of sensors (9) configured to generate a detection field in a certain pattern underneath the vehicle (1) for sensing a metallic object, the method comprising: 1. performing an authentication between the vehicle (1) and the charging station (6); 2. activating the detection field when a distance d between the vehicle (1) and the charging station (6) is equal to or less than a threshold distance dt and before any transfer of energy is started; 3. monitoring if any metallic object is in the detection field; 4. controlling transfer of energy from the charging station (6) to the vehicle (1) in dependence of the monitoring and the authentication.
    [14] 14. The method according to claim 13, comprising activating the detection field only if the vehicle (1) is positively authenticated to be charged from the charging station (6).
    [15] 15. The method according to claim 13 or 14, wherein the threshold distance d1 is equal to the length of a vehicle (1), or a set length of at least the length of the vehicle (1).
    [16] 16. The method according to any of the claims 13 to 15, wherein the plurality of sensors (9) includes inductive sensors and/or capacitive sensors.
    [17] 17. The method according to any of the claims 13 to 16, wherein the detection field has a shape of a fence.
    [18] 18. The method according to claim 17, wherein the vehicle (1) is equipped with a receiver unit (3) configured to receive energy from the charging station (6), and wherein the detection field in the shape of a fence at least partly encircles the receiver unit (3). 21
    [19] 19. The method according to claim 18, wherein the detection field has a width w and extends at least partly around the circumference of the vehicle (1).
    [20] 20. The method according to claim 18 or 19, wherein the detection field has a height h extending between at least one of the plurality of sensors (9) and the roadway (5) of the vehicle (1).
    [21] 21. The method according to any of the claims 13 to 20, comprising transferring energy to the vehicle (1) if at least one charging condition is fulfilled.
    [22] 22. The method according to claim 21, wherein the charging conditions includes: a positive authentication of the vehicle (1) to be charged from the charging station (6); the vehicle (1) is within a certain distance from the charging station (6); and the detection field is activated.
    [23] 23. The method according to any of the claims 13 to 22, comprising preventing transfer of energy to the vehicle (1) if any metallic object is detected in the detection field.
    [24] 24. The method according to any of the claims 13 to 23, comprising notifying the driver and/or a central unit if any metallic object is detected in the detection field. 25
    [25] 25.A computer program P, wherein said computer program P includes a computer program code to cause a control unit (10), or a computer connected to said control unit (10), to perform the method steps according to any of claims 1324. 30
    [26] 26.A computer program product comprising a computer program code stored on a non-transitory computer-readable medium to perform the method steps according to any of the claims 13-24, when said computer program code is 22 executed by a control unit (10) or by a computer connected to said control unit (10).
    [27] 27. A system comprising the device (19) according to any of the claims 1 to 10 and a charging station (6) configured for wireless transfer of energy from the charging station (6) to the vehicle (1).
    [28] 28. The system according to claim 27, wherein the vehicle (1) includes a distance detector (11) configured to measure a distance between the vehicle (1) and the charging station (6).
    [29] 29. The system according to claim 27 or 28, wherein the vehicle (1) and the charging station (6) are configured to communicate with in each other in a wireless way.
    [30] 30. A vehicle (1) comprising a device (19) according to any of the claims 1 to 12. Patentansokan nr / Patent application No: 1451089- 1 fOljande bilaga finns en oversattning av patentkraven till svenska. Observera att det är patentkravens lydelse pa engelska som galler. A Swedish translation of the patent claims is enclosed. Please note that only the English claims have legal effect.
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    同族专利:
    公开号 | 公开日
    SE538341C2|2016-05-24|
    DE102015011211A1|2016-03-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20110074346A1|2009-09-25|2011-03-31|Hall Katherine L|Vehicle charger safety system and method|
    DE102009033237A1|2009-07-14|2011-01-20|Conductix-Wampfler Ag|Device for inductive transmission of electrical energy|
    US20140021912A1|2012-07-19|2014-01-23|Ford Global Technologies, Llc|Vehicle battery charging system and method|GB2551372A|2016-06-16|2017-12-20|Bombardier Primove Gmbh|A secondary unit, a system for inductive power transfer and a method for operating a secondary unit and a system for inductive power transfer|
    CN108944497A|2018-05-30|2018-12-07|合肥市春华起重机械有限公司|A kind of AGV trolley wireless charging system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1451089A|SE538341C2|2014-09-17|2014-09-17|Device, method and system for enabling secure wireless transfer of energy to a vehicle|SE1451089A| SE538341C2|2014-09-17|2014-09-17|Device, method and system for enabling secure wireless transfer of energy to a vehicle|
    DE102015011211.2A| DE102015011211A1|2014-09-17|2015-08-26|Apparatus, method and system for realizing secure and wireless transmission of power to a vehicle|
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