• 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:
    The invention relates to an activation device with a circuit-breaker unit for a dual-battery system, which system comprises a power battery system connected to an electrical system comprising a starter motor and an ignition lock circuit for a vehicle, and a starter battery system adapted to being connected in parallel with said power battery system via said circuit-breaker unit, which circuit-breaker unit is switchable between an open state and a closed state, in which latter state said starter battery system is adapted to supplying said electrical system with energy. The activation device comprises a control unit adapted to switching said circuit-breaker unit between said open and closed states, a signal unit adapted to generating a voltage signal y1 and conveying a voltage signal y via an ignition lock connection to said ignition lock circuit, a monitoring unit adapted to monitoring a voltage signal y from said ignition lock connection and generating a monitoring signal on the basis of said voltage signal y monitored, and a processor unit adapted to comparing the monitoring signal with at least one predetermined detection criterion and generating on the basis of said comparison a control signal which is conveyed to said control unit which is adapted to switching said circuit-breaker unit on the basis of said control signal. The invention comprises also a method for activating a circuit-breaker unit in a dual-battery system.
    公开号:SE1051140A1
    申请号:SE1051140
    申请日:2010-11-01
    公开日:2012-05-02
    发明作者:Gunnar Ledfelt
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    30 2 Today's vehicles have many applications that are powered by the vehicle's generator and battery. When the vehicle's engine is switched off, and the generator can therefore not supply energy, applications that use energy must be powered from the batteries. There is thus a risk that the energy in the batteries is consumed to such an extent that the remaining energy in the batteries is not sufficient to start the vehicle's engine.
    To solve this problem, you can have a battery that is primarily used to power the starter motor and the systems necessary for engine start-up, and a power battery that is primarily used to power applications in the vehicle. An example of such a battery system is called a "dual-battery system".
    I E 1137150 describes a dual battery system comprising a starter battery, a power battery and a coupling element. Via a battery control device, the coupling element can be controlled so that the current flow from the batteries to a load is regulated depending on the operating conditions.
    US 5316868 describes a switch device in a dual battery system to be able to switch the batteries as needed. For example, when the primary battery cannot provide enough starting current to start the vehicle and when the extra battery needs to be switched on, which can be done automatically.
    US 6229279 describes a dual battery system and a method of controlling the system, this method including determining the charge balance between the starter battery and the power battery. The system contains an electrically controlled switch, for example a MOSFET, which becomes active when a charging current can från flow from the power battery to the starter battery.
    US 2005285559 describes a switchable dual battery system. The system can be switched between an "ON" state when the motor is running, an "OFF state when the motor is switched off and" START state when parts of the system need to be switched on.
    Between the two batteries there is a switch and a control device to open the switch when the system is in "OFF" mode. 10 15 20 25 30 3 Common to the techniques quoted above is that they use a switch of some kind between the starter battery and the power battery, to control the flow of energy from the batteries. A switch in a dual battery can be activated, for example, electrically. Since it is electrically controlled, the circuit that controls the activation of the switch must be supplied with power.
    The purpose of the invention is to provide an improved way of activating a switch in a dual battery system, which in particular works even when the power battery system is discharged.
    Summary of the invention The object described above is achieved by an activating device with a switch unit for a dual battery system. Dual battery system comprises a power battery system connected to an electrical system comprising a starter motor and a starter lock circuit for a vehicle, and a starter battery system adapted to be connected in parallel with said power battery system via said switch unit, said switch unit being adjustable between an open position and a closed position. said starter battery system is adapted to supply said electrical system with energy and also to receive charging current. The actuating device further comprises a control unit adapted to control said switch unit between said open and closed positions; a signal unit adapted to generate a voltage signal y; and transmitting a voltage signal y via a start lock connection to said start lock circuit; a sensing unit adapted to sense a voltage signal y from said start lock connection, and generate a sensing signal in dependence on said sensed voltage signal y; and a processor unit adapted to compare the sensing signal with at least one predetermined detection criterion and generate a control signal in dependence on said comparison and applied to said control unit, the control unit being adapted to regulate said switching unit in dependence on said control signal.
    The object is achieved according to another aspect by a method for activating a switch unit in a dual battery system. Said dual battery system comprises a power battery system connected to an electrical system comprising a starter motor and a starter lock circuit for a vehicle, and a starter battery system adapted to be connected in parallel with said power battery system via said switch unit, said switch unit being adjustable between an open position and a closed position, in which closed position said starter battery system is adapted to supply said electrical system with energy and also to receive charging current. The method further comprises - generating a voltage signal y; and transmitting a voltage signal y via a start lock connection to said start lock circuit; - sensing a voltage signal y from said start lock connection, and generating a sensing signal in dependence on said sensed voltage signal y; - comparing the sensing signal with at least one predetermined detection criterion and generating a control signal in dependence on said comparison; - controlling said switch unit in dependence on said control signal.
    Through the invention, the dual battery system becomes independent of the state of charge in the power batteries to start the vehicle. The driver can start the vehicle without taking special measures without turning the ignition key as usual. No modification of the starter lock needs to be made either.
    Only one conductor between the activating device and the starter lock is necessary, which reduces the number of components needed. Furthermore, the system can be made less susceptible to disturbances by careful selection of y | and output resistance Ruth.
    Preferred embodiments are described in the dependent claims and in the detailed description.
    Brief Description of the Attached ema gures Below, the invention will be described with reference to the accompanying ur gures, of which: Figure 1 illustrates a system for starting a vehicle without a dual battery system.
    Figure 2 illustrates an activating device according to the invention, connected in a dual battery system.
    Figure 3 shows an activating device according to an embodiment of the invention.
    Figure 4 shows a diagram of the voltage signals y; and y, and what happens when the 50 position in the ignition switch is turned on.
    Figure 5 illustrates a flow chart for an activation method according to the invention. Detailed Description of Preferred Embodiments of the Invention Figure 2 shows an activating device connected to a dual battery system and a starter lock circuit. In the clock, the activating device is shown as a separate unit, but it is also conceivable that the activating device is part of a coordinator unit, COO, which is also shown in the figure.
    The activating device comprises a switch unit for a dual battery system.
    The dual battery system comprises a power battery system 1 connected to an electrical system comprising a starter motor SM and a starter lock circuit for a vehicle. The dual battery system also comprises a starter battery system 2 adapted to be connected in parallel with the power battery system via the switch unit. The switch unit is adjustable between an open position and a closed position, in which closed position the starter battery system is adapted to supply the electrical system with energy and preferably also receive charging current. The starting locking circuit comprises, as explained earlier in connection with l gur 1, a control that can be adjusted by, for example, turning a key. In Figure 2, the “50” mode is the mode that closes the starter lock circuit when the starter motor is to be started. This mode is called boot mode, and is thus an existing device in a boot lock. According to an embodiment, the electrical system also comprises a coordinator unit, COO, and an EMS unit. Figure 2 shows the coordinator unit connected to the start position of the starter lock circuit, and the coordinator unit is in turn connected to the EMS unit.
    The two units are connected to and powered by the dual battery system. If the power battery system l is not discharged, the coordinator unit and the EMS unit can be supplied with energy via this system. If the power battery system 1 is discharged, the units must be energized via the starter battery system 2 when the starter motor is to be started. The switch unit must then be in its closed position. According to one embodiment, the coordinator unit also comprises an input resistor, Rin (not shown in the figures).
    The activating device will now be explained in more detail with reference to Figure 3.
    As shown in Fig. 3, the activating device comprises a control unit which is adapted to regulate the switching unit between said open and closed positions, and a signal unit which is adapted to generate a voltage signal y; and transmitting a voltage signal y via a start lock connection to said start lock circuit. The start lock connection comprises, for example, a cable between the signal unit and the start position of the start lock circuit, in Figure 2 shown as the “50” position.
    The activating device can also comprise an output resistance Rut connected to the signal unit, which can be used to obtain the desired voltage level. The voltage signal y; is thus transmitted via Ru, on the start lock connection and distributed on the resistors in the circuit, here exemplified as the output resistance Rut and the input resistance Rmi coordinator unit, when the start position is switched on. According to one embodiment, one or both resistors can instead be impedances.
    The activating device further comprises a sensing unit adapted to sense a voltage signal y from said start lock connection, and generate a sensing signal in dependence on said sensed voltage signal y. When the start position is closed, y will thus change, which is sensed by the sensing unit. The voltage signal y is preferably sensed somewhere on the start lock connection between said output resistance Ru, and said start lock circuit. A processor unit in the activating device is further adapted to compare the sensing signal with at least one predetermined detection criterion and generate a control signal depending on said comparison and applied to said control unit, the control unit being adapted to regulate said switching unit depending on the control signal.
    In this way, the activating device can detect if the start position has been closed, and thus put the switch unit in a closed position. The electrical system then receives energy from the starter battery system, and the energy supply to the starter motor can be regulated so that the starter motor can be started.
    The activating device is preferably adapted to be energized from the starter battery system.
    This ensures that the activating device always has enough energy to be able to perform its functions, provided that the starter battery system is not discharged.
    When the activating device has detected that the starting lock circuit has been closed, the one which will be explained in the following, preferably generates a control signal which closes the switch between the starting battery system and the power battery system. In order for the activating device to be able to detect that the start lock circuit has been closed, the processor unit compares the sensing signal with at least one predetermined detection criterion. According to one embodiment, a detection criterion comprises that the sensing signal deviates from a predetermined signal value, and if the detection criterion is met, the processor unit is adapted to generate a control signal which indicates that the switch unit is to be closed. The signal unit thus sends out a bias to the start lock circuit via the start lock connection, and when the start position is closed, the voltage on the start lock connection will change as the load changes.
    The activity device senses this change by sensing the voltage from the start lock connection and generating a sensing signal. According to this embodiment, the processor unit then compares the sensing signal with, for example, a predetermined signal value or interval, and if the sensing signal deviates from the predetermined signal value or the interval, a control signal is generated which indicates that the switch is to be closed. The predetermined signal value may, for example, be a signal value that the processor unit receives from the signal unit, based on the voltage that the signal unit emits. The interval can, for example, be a certain amplitude range around a signal value that the processor unit receives from the signal unit.
    When the switch is closed, current can then flow from the starter battery system to the electrical system. When the switch unit is closed, the coordinator unit COO thus receives energy from the starter battery system 2 and can send a control signal to the EMS unit which in turn regulates the power supply to the starter motor SM so that it can be started.
    According to one embodiment, said voltage signal y1 comprises an alternating voltage. If the voltage signal y1 is a direct voltage, and the power battery system 1 is deeply discharged, there is a risk that the voltage across the power battery system 1 coincides with the voltage of the signal y.This leads to no change being detected when the start position closes, and the activating device to the switch unit.
    By having an alternating voltage where the amplitude thus varies alternately, this case is avoided. Figure 4 illustrates the generated and transmitted voltage y1 as an alternating voltage. The same figure shows the alternating voltage y, which is thus decimated from y; by being distributed on the resistors in the circuit, Ruth and Rin respectively. When the start position is closed, the voltage y on the start lock connection changes, for example according to one of the dashed lines in the fi clock. The new voltage level is, for example, dependent on the energy level in the power batteries 1. This change is detected by the activating device. According to one embodiment, the voltage signal y has an amplitude in the range 0.1 mV to 30% of the voltage capacity of the power battery system. If the amplitude is below 0.1 mV, there is a risk that the signal is disturbed from surrounding components. 30% of the power battery system's capacity means for a 24-volt system about 7 V. For a 12-volt system, 30% instead means about 3.6 V. If the amplitude is above these values in each case, the voltage signal from the signal unit can contribute to an involuntary start of the coordinate start signal .
    The coordinator can then interpret the voltage signal as a start-up signal, and then generate a start signal to the EMS unit.
    According to one embodiment, the sensing unit is adapted to sense a voltage signal y2 from said power battery system, the processor unit being adapted to compare the voltage signal y2; with a predetermined threshold value T fl, and if said voltage signal y2 exceeds or is equal to the threshold value Tyg, the processor unit is adapted to deactivate said signal unit so that no first voltage signal y1 is generated. In this way, the energy consumption from the starter batteries can be limited.
    The sensing unit is preferably adapted to generate a sensing signal in dependence on said sensed voltage signal yg, which is applied to the processor unit. Figure 3 shows a connection between the power battery system and the sensing unit, with the aid of which y; obtained.
    Threshold Ty; is, for example, a value that indicates the minimum voltage level that is sufficient to energize the electrical system. However, the sensing unit can still sense that there is a change in the voltage signal on the starting lock connection when the starting position is switched on, and thus the switch unit can be activated so that energy can be obtained from the starting battery system.
    According to one embodiment, the control unit comprises a timer unit which is adapted to measure the time t when the switch unit is closed, and when the time t exceeds a predetermined threshold value Tt, the control unit is adapted to regulate said switch unit to an open position. In this way, the switch unit is only closed for a predetermined period of time, and the starter battery system does not risk being discharged for energy. Thus, the switch can also be regulated to the open position when, for example, no control signal has been generated from the coordinator unit which indicates that the switch is to be opened (see explanation below), for example due to failed start. Figure 2 and partly Figure 3 also show examples of a holding circuit from the coordinator unit to the activating device. According to one embodiment, the coordinator unit is adapted to control the switch so that the switch is kept closed until charging of the starter batteries is to be completed. In this way, the starter batteries can be recharged. The coordinator unit can do this, for example, by sending control signals to the processor unit, the control unit or directly to the switch unit in the activating device.
    The invention also comprises a method for activating a switch unit in a dual battery system, which is illustrated in Figure 5. The dual battery system has been explained previously in connection with the activating device. The method comprises in a first step S1 to generate a voltage signal y1 and transmit a voltage signal y via a start lock connection to said start lock circuit. In the next step S2, a voltage signal y is shielded from said start lock connection, and then a sensing signal is generated in dependence on said sensed voltage signal y in a third step S3. In a fourth step S4, the sensing signal is compared with at least one predetermined detection criterion. Depending on the comparison, a control signal is then generated in step S5. In step S6, said switch unit is then regulated in dependence on the control signal. In this way, a switch unit can be activated when needed so that energy can be obtained from the starter batteries, for example when a vehicle at start-up needs energy to be able to start the starter motor. The system thus becomes insensitive to whether the power batteries are discharged or not.
    According to one embodiment, the method comprises that a detection criterion comprises that the sensing signal deviates from a predetermined signal value, and if the detection criterion is met, the switch unit is regulated to the closed position. In this way, the switch unit can be closed if, for example, the start position in the start lock circuit has been closed, and the circuit load has changed, which gives rise to a changed voltage signal on the start lock connection.
    According to another embodiment, the method comprises shielding a bias signal y; from said power battery system, comparing the voltage signal y; with a predetermined threshold value Fabric, and deactivating said signal unit in case y; exceeds or is equal to the Threshold value Fabric, so that no first voltage signal y; generated. Thus, one does not need to send out any voltage signal y1 if there is enough energy in the power battery system to energize the various units in the electrical system.
    In order to obtain the desired voltage level on the start lock connection, the activating device according to an embodiment comprises an output resistance Rut connected via said start lock connection. The method according to this embodiment comprises sensing the voltage signal y somewhere on the start lock connection between said output resistance Ru, and said start lock circuit.
    According to one embodiment, the method comprises measuring the time t when the switch unit is closed, and regulating said switch unit to an open position when the time t exceeds a predetermined threshold value T1. In this way, no more energy than necessary is taken from the starter battery system.
    The invention also comprises a computer program product, which comprises computer program instructions for causing a computer system in a vehicle to perform the steps according to the above-mentioned method, when the computer program instructions are run on said computer system.
    The invention also comprises a computer program product, where the computer program instructions are stored on a medium readable by a computer system.
    The present invention is not limited to the embodiments described above.
    Various alternatives, modifications and equivalents can be used. Therefore, the above-mentioned embodiments do not limit the scope of the invention, which is defined by the appended claims.
    权利要求:
    Claims (16)
    [1]
    Activation device with a switch unit for a dual battery system, wherein said double battery system comprises: - a power battery system connected to an electrical system comprising a starter motor and a starter lock circuit for a vehicle, and - a starter battery system adapted to be connected in parallel with said power battery system, said switch unit said switch unit being controllable between an open position and a closed position, in which closed position said starter battery system is adapted to supply said electrical system with energy, characterized by the activating device comprising - a control unit adapted to regulate said switch unit between said open and closed positions ; a signal unit adapted to generate a voltage signal y] and transmit a voltage signal y via a start lock connection to said start lock circuit; a sensing unit adapted to sense a voltage signal y from said starter lock connection, and generate a sensing signal in dependence on said sensed voltage signal y; a processor unit adapted to compare the sensing signal with at least one predetermined detection criterion and generate a control signal in dependence on said comparison and applied to said control unit, the control unit being adapted to regulate said switching unit in dependence on said control signal.
    [2]
    An activating device according to claim 1, wherein a detection criterion comprises that the sensing signal deviates from a predetermined signal value, and if the detection criterion is met, the processor unit is adapted to generate a control signal indicating that the switch unit is to be closed.
    [3]
    Activation device according to any one of claims 1 or 2, wherein said voltage signal y1 comprises an alternating voltage.
    [4]
    Activation device according to claim 3, wherein said voltage signal y has an amplitude in the range 0.1 mV to 30% of the voltage capacity of the power battery system. 10 15 20 25 30 12
    [5]
    Activation device according to one of claims 1 to 4, wherein the sensing unit is adapted to sense a voltage signal y; from said power battery system, the processor unit being adapted to compare the voltage signal y; with a predetermined threshold value Fabric, and in case said voltage signal y; exceeds or is equal to the threshold value Fabric, the processor unit is adapted to deactivate said signal unit so that no first voltage signal y 1 is generated.
    [6]
    Activation device according to one of Claims 1 to 4, which comprises an output resistance.
    [7]
    Activation device according to claim 6, wherein the voltage signal y is sensed somewhere on the start lock connection between said output resistance and said start lock circuit.
    [8]
    Activation device according to any one of claims 1 to 7, wherein the control unit comprises a timer unit adapted to measure the time t when the switch unit is closed, and when the time t exceeds a predetermined threshold value Tt, the control unit is adapted to regulate said switch unit to an open position. .
    [9]
    Activation device according to any one of claims 1 to 8, wherein the activation device is adapted to be energized from the starter battery system.
    [10]
    A method of activating a switch unit in a dual battery system, said dual battery system comprising a power battery system coupled to an electrical system comprising a starter motor and a starter lock circuit for a vehicle, and a starter battery system adapted to be connected in parallel with said power battery system via said switch unit, controllable between an open position and a closed position, in which closed position said starter battery system is adapted to supply said electrical system with energy, characterized in that the method comprises - generating a voltage signal y; and transmitting a voltage signal y via a start lock connection to said start lock circuit; Sensing a voltage signal y from said start lock terminal, and generating a sensing signal in response to said sensed voltage signal y; - comparing the sensing signal with at least one predetermined detection criterion and generating a control signal in dependence on said comparison; - controlling said switch unit in dependence on said control signal.
    [11]
    A method according to claim 10, wherein a detection criterion comprises that the sensing signal deviates from a predetermined signal value, and if the detection criterion is met, the switch unit is regulated to the closed position.
    [12]
    A method according to claim 10 or 11, wherein said voltage signal y; includes an alternating voltage.
    [13]
    A method according to any one of claims 10 to 12, comprising sensing a voltage signal y; from said power battery system, comparing the voltage signal y; with a predetermined threshold value Fabric, and deactivating said signal unit in case y; exceeds or is equal to the threshold value Fabric, so that no first voltage signal yl is generated.
    [14]
    A method according to any one of claims 10 to 13, comprising measuring the time t when the switch unit is closed, and regulating said switch unit to an open position when the time t exceeds a predetermined threshold value Tt.
    [15]
    A computer program product, comprising computer program instructions for causing a computer system in a vehicle to perform the steps of the method according to any one of claims 10 to 14, when the computer program instructions are run on said computer system.
    [16]
    The computer program product of claim 15, wherein the computer program instructions are stored on a medium readable by a computer system.
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1051140A|SE535351C2|2010-11-01|2010-11-01|Activation device and activation method for a dual battery system|SE1051140A| SE535351C2|2010-11-01|2010-11-01|Activation device and activation method for a dual battery system|
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    KR1020137014166A| KR20140000262A|2010-11-01|2011-10-18|Activation device and activation method for a dual-battery system|
    BR112013008808-7A| BR112013008808B1|2010-11-01|2011-10-18|dual battery system, method for activating a circuit breaker unit and computer readable medium|
    PCT/SE2011/051243| WO2012060766A1|2010-11-01|2011-10-18|Activation device and activation method for a dual-battery system|
    RU2013125443/07A| RU2536163C1|2010-11-01|2011-10-18|Activating device and activation method for dual battery system|
    EP11838317.3A| EP2635799B1|2010-11-01|2011-10-18|Activation device and activation method for a dual-battery system|
    CN2011800517845A| CN103201502A|2010-11-01|2011-10-18|Activation device and activation method for a dual-battery system|
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