Power supply device and vehicle

Abstract

The present application discloses a power supply device and a vehicle, wherein the power supply device includes a controlled switch circuit, which is respectively connected to a parking device and a battery body, and the controlled switch circuit is used to be turned on in an enabled state to supply power to the parking device; an action circuit, which is respectively connected to the controlled switch circuit and the battery body, and the action circuit is used to trigger a BMS module failure signal in a powered-on state to enable the controlled switch circuit; a BMS module failure detection circuit, which is connected in parallel with the parking device together with the controlled switch circuit and is connected to the action circuit, and the BMS module failure detection circuit is used to store energy when the BMS module is not failed, so as to control the action circuit to be powered on when the BMS module fails, and output a BMS module failure signal. The embodiment of the present application can bypass the BMS module to provide emergency power supply to the parking device after the BMS module fails unexpectedly, so as to prevent the parking device from accidentally locking, thereby effectively improving the safety of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of automotive power batteries, and in particular to a power supply device and a vehicle. Background Art

[0002] In the related art, the power system of the vehicle includes a parking device, which is fixed to the power motor of the vehicle as a whole. When the parking device is powered off, the motor will be locked, thereby parking the vehicle. Therefore, if the vehicle is to be driven well, the parking device needs to be powered on.

[0003] The parking device is powered by the vehicle's power battery, which includes a battery management system BMS module. The BMS module can manage the power supply to the parking device, thereby ensuring that the vehicle's power battery can supply power to the parking device and other devices in the vehicle. Then, during the use of the vehicle, the power battery may overheat, overvoltage, undervoltage, or the BMS module may fail, causing the BMS module to be unable to supply power to the parking device, resulting in the parking device accidentally locking the motor, which in turn causes the vehicle to stop suddenly, causing injuries to the vehicle occupants. Summary of the invention

[0004] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0005] The embodiments of the present application provide a power supply device and a vehicle, which can provide emergency power supply to a parking device when a BMS module fails unexpectedly, thereby reducing the possibility of sudden stops of the vehicle due to the unexpected failure of the BMS module.

[0006] On the one hand, an embodiment of the present application provides a device for use in a vehicle, the vehicle comprising a motor control device and a parking device, the motor control device being connected to the parking device, the power supply device comprising a battery management system BMS module, a battery body and an anti-parking brake circuit, the battery body, the BMS module and the motor control device being connected in sequence;

[0007] The anti-parking brake circuit comprises:

[0008] A controlled switch circuit, connected to the parking device and the battery body respectively, the controlled switch circuit is used to be turned on in an enabled state to supply power to the parking device;

[0009] an action circuit, connected to the controlled switch circuit and the battery body respectively, and configured to trigger a BMS module failure signal in a power-on state to enable the controlled switch circuit;

[0010] A BMS module failure detection circuit is connected in parallel with the parking device together with the controlled switch circuit, and is connected to the action circuit. The BMS module failure detection circuit is used to store energy when the BMS module is not failed, so as to control the action circuit to be powered on and output the BMS module failure signal when the BMS module fails.

[0011] Optionally, the action circuit includes:

[0012] A power-on circuit, connected to the BMS module failure detection circuit and the battery body, respectively, and the power-on circuit is used to control conduction through the BMS module failure detection circuit;

[0013] a power supply circuit, connected to the power-on circuit, and configured to supply power when the power-on circuit is turned on;

[0014] The control circuit is respectively connected to the power supply circuit, the BMS module failure detection circuit and the controlled switch circuit. The control circuit is used to trigger the BMS module failure signal when the power supply circuit is supplying power, and output an enable signal for enabling the controlled switch circuit.

[0015] Optionally, the BMS module failure detection circuit includes:

[0016] a first detection circuit, connected in parallel with the parking device together with the controlled switch circuit, and connected to the power-on circuit, the first detection circuit being used to store energy when the BMS module is not failed, so as to control the power-on circuit to be turned on when the BMS module fails;

[0017] A second detection circuit is connected in parallel with the parking device together with the controlled switch circuit and is connected to the control circuit. The second detection circuit is used to store energy when the BMS module is not failed, so as to output a failure signal of the BMS module when the BMS module fails.

[0018] Optionally, the controlled switch circuit comprises:

[0019] A positive switch circuit is connected to the positive electrode of the parking device and the positive electrode of the battery body respectively, and the positive switch circuit is used to connect the positive electrode of the parking device to the positive electrode of the battery body in a conductive state;

[0020] a negative electrode switch circuit, connected to the power supply circuit, the negative electrode of the parking device and the negative electrode of the battery body respectively, and the negative electrode switch circuit is used to connect the negative electrode of the parking device to the negative electrode of the battery body when the power supply circuit is supplied and the negative electrode is in a conducting state;

[0021] The enabling circuit is connected to the control circuit, the positive switching circuit and the negative switching circuit respectively, and the enabling circuit is used to trigger the enabling signal to control the positive switching circuit and the negative switching circuit to be turned on.

[0022] Optionally, the control circuit is further configured to output a self-locking signal when the power supply circuit is supplying power;

[0023] The power-on circuit comprises:

[0024] A power-on trigger unit, comprising a first switch device, wherein a cathode of the first switch device is connected to the power supply circuit, a control electrode of the first switch device is connected to the first detection circuit, and the power-on trigger unit is used for the first detection circuit to control the first switch device to be turned on, so as to trigger the power supply circuit to be powered on;

[0025] The self-locking circuit is connected to the control electrode of the first switching device and the control circuit respectively, and the self-locking circuit is used to be turned on by the self-locking signal to keep the first switching device turned on.

[0026] Optionally, the second detection circuit includes:

[0027] a first energy storage capacitor, wherein a positive electrode of the first energy storage capacitor is connected to a positive electrode of the parking device;

[0028] a first diode, wherein the anode of the first diode is connected to the cathode of the first energy storage capacitor;

[0029] A first voltage stabilizing diode connected in parallel with the first diode;

[0030] a first resistor connected to the negative electrode of the first energy storage capacitor;

[0031] a first optocoupler device, wherein a light emitting portion of the first optocoupler device is connected in series with the first resistor, and a receiving portion of the first optocoupler device is connected with the control circuit;

[0032] The second resistor is connected in parallel to the positive electrode of the first energy storage capacitor and the negative electrode of the first diode.

[0033] Optionally, the first detection circuit includes:

[0034] a second energy storage capacitor, wherein a positive electrode of the second energy storage capacitor is connected to a positive electrode of the parking device;

[0035] a second diode, wherein the anode of the second diode is connected to the cathode of the second energy storage capacitor;

[0036] a second voltage stabilizing diode connected in parallel with the second diode;

[0037] a third resistor connected to the negative electrode of the second energy storage capacitor;

[0038] a second optocoupler device, wherein the light emitting portion of the second optocoupler device is connected in series with the third resistor, and the receiving portion of the second optocoupler device is connected with the power-on circuit;

[0039] A fourth resistor is connected in parallel to the positive electrode of the second energy storage capacitor and the negative electrode of the second diode.

[0040] Optionally, the power-on trigger unit further includes:

[0041] A power-on filter circuit connected in parallel to the control electrode of the first switch device and the positive electrode of the first switch device;

[0042] a fifth resistor, connected to the control electrode of the first switch device and connected in series with the receiving part of the second optical coupler device;

[0043] a third voltage stabilizing diode, wherein a cathode of the third voltage stabilizing diode is connected in series to a receiving part of the second optical coupling device;

[0044] The third energy storage capacitor is connected in parallel to the positive electrode of the first switch device and the positive electrode of the third voltage stabilizing diode.

[0045] Optionally, the vehicle further comprises a speed measuring device for measuring the speed of the vehicle;

[0046] The control circuit is connected to the speed measuring device, and the control circuit is further used to obtain the vehicle speed of the vehicle through the speed measuring device to output an enable signal for the vehicle speed.

[0047] On the other hand, an embodiment of the present application further provides a vehicle, the vehicle comprising:

[0048] Motor control devices;

[0049] A parking device connected to the motor control device;

[0050] As described in the first aspect above, the power supply device is connected to the parking device and the motor control device respectively.

[0051] The embodiments of the present application include at least the following beneficial effects: the power supply device includes a controlled switch circuit, which is respectively connected to the parking device and the battery body, and the controlled switch circuit is used to be turned on in an enabled state to supply power to the parking device; an action circuit, which is respectively connected to the controlled switch circuit and the battery body, and the action circuit is used to trigger a BMS module failure signal in a power-on state to enable the controlled switch circuit; a BMS module failure detection circuit, which is connected in parallel with the parking device together with the controlled switch circuit and is connected to the action circuit, and the BMS module failure detection circuit is used to store energy when the BMS module is not failed, so as to control the action circuit to be powered on when the BMS module fails, and output the BMS module failure signal. Energy is stored by the BMS module failure detection circuit when the BMS module has not failed. In this way, when the BMS module failure detection circuit cannot store energy, it can be determined that the BMS module is in a state of accidental failure, so that a BMS module failure signal indicating that the BMS module has failed can be output, and the action circuit can be controlled to power on. Then, by powering on the action circuit, the action circuit can enter a working state, so that the action circuit can detect the BMS module failure signal issued by the BMS module failure detection circuit. When the BMS module failure signal is detected, the controlled switch circuit can be enabled. Since the controlled switch circuit is respectively connected to the parking device and the battery body, when the controlled switch circuit is turned on by the enablement of the action circuit, the parking device can bypass the BMS module and obtain power from the battery body, thereby preventing the parking device from accidentally locking due to accidental power failure, thereby reducing the sudden stop caused by the accidental failure of the BMS module, and effectively improving the safety of the vehicle.

[0052] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained through the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0054] Figure 1 This is a partial structural diagram of the interior of a vehicle provided by an embodiment of the present application;

[0055] Figure 2 is a circuit structure diagram of an anti-lock braking circuit provided by an embodiment of the present application;

[0056] Figure 3 is a circuit structure diagram of an action circuit provided by an embodiment of the present application;

[0057] Figure 4 is a circuit structure diagram of a BMS module failure detection circuit provided by an embodiment of the present application;

[0058] Figure 5 is a circuit structure diagram of a controlled switch circuit provided by an embodiment of the present application;

[0059] Figure 6 is a circuit structure diagram of a second detection circuit provided by an embodiment of the present application;

[0060] Figure 7 It is a circuit structure diagram of a first detection circuit provided in one embodiment of the present application. DETAILED DESCRIPTION

[0061] The present application is further described below in conjunction with the accompanying drawings and specific embodiments. The described embodiments should not be regarded as limiting the present application, and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0062] In the following description, reference is made to “some embodiments”, which describe a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0064] In the related art, the power system of the vehicle includes a parking device, which is fixed to the power motor of the vehicle as a whole. When the parking device is powered off, the motor will be locked, thereby parking the vehicle. Therefore, if the vehicle is to be driven well, the parking device needs to be powered on.

[0065] The parking device is powered by the vehicle's power battery, which includes a battery management system BMS module. The BMS module can manage the power supply to the parking device, thereby ensuring that the vehicle's power battery can supply power to the parking device and other devices in the vehicle. Then, during the use of the vehicle, the power battery may overheat, overvoltage, undervoltage, or the BMS module may fail, causing the BMS module to be unable to supply power to the parking device, resulting in the parking device accidentally locking the motor, which in turn causes the vehicle to stop suddenly, causing injuries to the vehicle occupants.

[0066] In order to provide emergency power supply to the parking device when the BMS module fails unexpectedly, thereby reducing the sudden stop of the vehicle due to the accidental failure of the BMS module, an embodiment of the present application provides a power supply device and a vehicle, the power supply device includes a controlled switch circuit, which is respectively connected to the parking device and the battery body, and the controlled switch circuit is used to be turned on in an enabled state to power the parking device; an action circuit, which is respectively connected to the controlled switch circuit and the battery body, and the action circuit is used to trigger the BMS module failure signal in the power-on state to enable the controlled switch circuit; a BMS module failure detection circuit, which is connected in parallel with the parking device together with the controlled switch circuit and is connected to the action circuit, and the BMS module failure detection circuit is used to store energy when the BMS module is not failed, so as to control the action circuit to be powered on when the BMS module fails, and output the BMS module failure signal. Energy is stored by the BMS module failure detection circuit when the BMS module has not failed. In this way, when the BMS module failure detection circuit cannot store energy, it can be determined that the BMS module is in a state of accidental failure, so that a BMS module failure signal indicating that the BMS module has failed can be output, and the action circuit can be controlled to power on. Then, by powering on the action circuit, the action circuit can enter a working state, so that the action circuit can detect the BMS module failure signal issued by the BMS module failure detection circuit. When the BMS module failure signal is detected, the controlled switch circuit can be enabled. Since the controlled switch circuit is respectively connected to the parking device and the battery body, when the controlled switch circuit is turned on by the enablement of the action circuit, the parking device can bypass the BMS module and obtain power from the battery body, thereby preventing the parking device from accidentally locking due to accidental power failure, thereby reducing the sudden stop caused by the accidental failure of the BMS module, and effectively improving the safety of the vehicle.

[0067] Reference Figure 1 As shown, Figure 1 The power supply principle of the power supply device is shown. In the embodiment of the present application, the power supply device 1 is applied to a vehicle, and the vehicle may include a motor control device 2 and a parking device 3, and the motor control device 2 is connected to the parking device 3. The power supply device 1 may include a battery management system BMS module 13, a battery body 12 and an anti-parking brake circuit 11, and the battery body 12, the battery management system BMS module 13 and the motor control device 2 are connected in sequence.

[0068] Reference Figure 2 As shown, Figure 2The circuit structure of the anti-parking braking circuit 11 is shown. In the embodiment of the present application, the anti-parking braking circuit 11 may include a controlled switch circuit 111, an action circuit 112 and a BMS module failure detection circuit 113.

[0069] The controlled switch circuit 111 can be connected to the parking device 3 and the battery body 12 respectively, and the controlled switch circuit 111 can be used to be turned on in the enabled state to supply power to the parking device 3. The controlled switch circuit 111 is a circuit composed of electronic switch devices, and the electronic switch devices constituting the controlled switch circuit 111 can be IGBTs, electronic MOS tubes, etc., which are not specifically limited here.

[0070] The action circuit 112 can be connected to the controlled switch circuit 111 and the battery body 12 respectively. The action circuit 112 can be used to trigger the BMS module failure signal in the power-on state to enable the controlled switch circuit 111. Among them, the BMS module failure signal refers to a signal used to indicate that the BMS module 13 has failed. Among them, the failure of the BMS module 13 refers to the situation where the BMS module 13 cannot supply power to the parking device 3 due to an abnormality. In addition, the BMS module failure signal can be a voltage signal or a current signal, which is not specifically limited here. In addition, the enabling of the controlled switch circuit 111 by triggering the BMS module failure signal means that the action circuit 112 is triggered by the BMS module failure signal, and the controlled switch circuit 111 is enabled by responding to this interrupt event. In this case, unless there is another event with a higher priority, regardless of whether the BMS module failure signal exists after triggering the action circuit 112, the action circuit 112 will complete the enabling of the controlled switch circuit 111. It should be noted that the "other events with a higher priority" here can be non-interruption events (such as power failure of the action circuit 112) or interrupt events (such as vehicle stop interrupt events), which are not specifically limited here. In addition, the action circuit 112 can be a simple microcontroller (MCU) such as a single-chip microcomputer, FPGA, etc., or a circuit composed of an MCU and its peripheral circuits, which are not specifically limited here.

[0071] The BMS module failure detection circuit 113 can be connected in parallel with the controlled switch circuit 111 to the parking device 3, and connected to the action circuit 112. The BMS module failure detection circuit 113 can be used to store energy when the BMS module is not failed, so as to control the action circuit 112 to power on and output a BMS module failure signal when the BMS module 13 fails. The BMS module failure detection circuit 113 can be a circuit composed of a sampling circuit, a capacitor, a comparator and other devices, which controls the action circuit 112 to power on and output a BMS module failure signal by comparing the voltage. It can also be other circuits, which are not specifically limited here.

[0072] Specifically, before the vehicle is started, the BMS module failure detection circuit 113 cannot store energy, and thus cannot control the action circuit 112 to power on and output a BMS module failure signal. At this time, the BMS module 13 and the controlled switch circuit 111 cannot supply power to the parking device 3. When the driver starts the vehicle, the motor control device 2 can conduct the BMS module 13 and the parking device 3. If the BMS module 13 is in a normal operating state, the BMS module 13 can supply power to the parking device 3 through the battery body 12, so that the parking device 3 can operate normally. Since the BMS module failure detection circuit 113 is connected to the parking device 3, when the BMS module 13 supplies power to the parking device 3 through the battery body 12, the BMS module failure detection circuit 113 can store energy through the electric energy output by the BMS module 13. At this time, the BMS module failure detection circuit 113 enters the operating state. When the BMS module failure detection circuit 113 can store energy, it indicates that the BMS module 13 has not failed. When the BMS module failure detection circuit 113 cannot store energy, it indicates that the BMS module 13 has failed. Based on this principle, when the BMS module 13 suddenly fails during normal operation, the BMS module failure detection circuit 113 cannot continue to store energy. Since the BMS module failure detection circuit 113 is not an energy storage device such as a battery, the BMS module failure detection circuit 113 will release the stored electric energy. When the BMS module failure detection circuit 113 releases the stored electric energy, the action circuit 112 can be powered on and the BMS module failure signal can be output through the continuously released electric energy. At this time, since the action circuit 112 is connected to the battery body 12, when the BMS module failure detection circuit 113 controls the battery body 12 to be powered on, the action circuit 112 can be powered on directly through the battery body 12, and then, the BMS module failure signal output by the BMS module failure detection circuit 113 is triggered to enable the controlled switch circuit 111. When the controlled switch circuit 111 is enabled, it will turn on the connection between the battery body 12 and the parking device 3, so that in the event of a failure of the BMS module 13, the BMS module 13 can be bypassed and the parking device 3 can be directly powered on through the battery body 12 for emergency. It should be noted that Figure 2 It is shown that the negative electrode of the motor control device 2 is connected to the negative electrode of the anti-parking brake circuit 11. When the BMS module 13 fails, other devices in the vehicle connected to the motor control device 2 (such as a display screen, etc.) can form a loop through the anti-parking brake circuit 11, so that they can still maintain operation when the BMS module 13 fails, reducing the loss of other functions of the vehicle caused by the failure of the BMS module 13.

[0073] Reference Figure 3 As shown, Figure 3 FIG. 1 shows the circuit structure of the action circuit. In one embodiment, the action circuit 112 may include a power-on circuit 1121, a power supply circuit 1122, and a control circuit 1123. The power-on circuit 1121 may be connected to the BMS module failure detection circuit 113 and the battery body 12 (in Figure 3 In the figure, the terminals A1 and A2 are connected to the BMS module failure detection circuit 113), and the power-on circuit 1121 can be used to control the conduction through the BMS module failure detection circuit 113. The power-on circuit 1121 can be a switch control circuit, or a circuit composed of a power management chip and its peripheral circuits, etc., which is not specifically limited here.

[0074] The power supply circuit 1122 can be connected to the power-on circuit 1121, and the power supply circuit 1122 can be used to supply power when the power-on circuit 1121 is turned on. The power supply circuit 1122 can be a voltage conversion circuit such as a Buck step-down circuit, or a voltage stabilizing circuit, or a composite circuit of multiple circuits such as a voltage conversion circuit and a voltage stabilizing circuit, which is not specifically limited here.

[0075] The control circuit 1123 can be connected to the power supply circuit 1122, the BMS module failure detection circuit 113 and the controlled switch circuit 111 respectively (in Figure 3 In the figure, the terminals B1 and B2 are used to indicate the connection with the BMS module failure detection circuit 113), the control circuit 1123 can be used to trigger the BMS module failure signal when the power supply circuit is powered, and output an enable signal for enabling the controlled switch circuit. The enable signal is not affected by the existence of the BMS module failure signal. When the control circuit 1123 is triggered by the BMS module failure signal, the control circuit 1123 will complete the output of the predetermined enable signal regardless of whether the BMS module failure signal exists.

[0076] In addition, the control circuit 1123 can be a simple microcontroller unit (MCU) such as a single chip microcomputer, FPGA, etc., or a circuit composed of an MCU and its peripheral circuits, which is not specifically limited here.

[0077] Specifically, when the BMS module failure detection circuit 113 powers on the control action circuit 112, the power-on circuit 1121 can be controlled to be turned on. Since the power-on circuit 1121 is connected to the battery body 12, the power-on circuit 1121 can power on the power supply circuit 1122 through the battery body 12. When the power supply circuit 1122 is powered on, it will output a power supply voltage. Since the control circuit 1123 is connected to the power supply circuit 1122, the control circuit 1123 can be powered on and operated by the power supply voltage. After the control circuit 1123 is powered on and operated, since the BMS module failure detection circuit 113 outputs a BMS module failure signal, the control circuit 1123 can detect and trigger the BMS module failure signal, and output an enable signal for enabling the controlled switch circuit 111, so that the controlled switch circuit 111 is triggered. Since the power-on circuit is provided, the action circuit 112 is not powered on before the BMS module fails, so that the action circuit 112 does not operate before the BMS module fails, thereby reducing the power consumption of the battery body by the action circuit 112 before the BMS module fails.

[0078] Reference Figure 4 As shown, Figure 4 FIG. 1 shows a circuit structure of the BMS module failure detection circuit 113 . In one embodiment, the BMS module failure detection circuit 113 may include a first detection circuit 1131 and a second detection circuit 1132 .

[0079] The first detection circuit 1131 can be connected in parallel with the controlled switch circuit 111 to the parking device 3, and connected to the power-on circuit 1121. The first detection circuit 1131 can be used to store energy when the BMS module 13 is not failed, so as to control the power-on circuit 1121 to be turned on when the BMS module 13 fails. The first detection circuit 1131 can be a circuit composed of a sampling circuit, a capacitor, a comparator and other devices, and controls the power-on circuit 1121 to be turned on by comparing the voltage. It can also be other circuits, etc., which are not specifically limited here.

[0080] The second detection circuit 1132 and the controlled switch circuit 111 are connected in parallel to the parking device 3 and are connected to the control circuit 1123. The second detection circuit 1132 is used to store energy when the BMS module 13 is not failed, so as to output a BMS module failure signal when the BMS module 13 fails. Among them, the second detection circuit 1132 can be a circuit composed of sampling circuits, capacitors, comparators and other devices, which controls the conduction of the power-on circuit 1121 by comparing the voltage, or it can be other circuits, etc., which are not specifically limited here. In addition, the energy storage capacity of the second detection circuit 1132 can be the same as that of the first detection circuit 1131, or it can be different, which is not specifically limited here.

[0081] Specifically, since both the first detection circuit 1131 and the second detection circuit 1132 are connected to the parking device 3, when the BMS module 13 supplies power to the parking device 3 through the battery body 12, both the first detection circuit 1131 and the second detection circuit 1132 can store energy through the electric energy output by the BMS module 13. When the BMS module 13 suddenly fails during normal operation, the first detection circuit 1131 and the second detection circuit 1132 cannot continue to store energy. At this time, the first detection circuit 1131 generates a signal for controlling the power-on circuit 1121 to be turned on based on the stored electric energy, so that the power-on circuit 1121 can be turned on alone. Similarly, the second detection circuit 1132 generates a BMS module failure signal based on the stored electric energy, so that the control circuit 1123 can be triggered alone. By providing the first detection circuit and the second detection circuit, the process of controlling the power-on circuit to be turned on and the process of triggering the control circuit can be isolated from each other, reducing mutual interference between the two.

[0082] Reference Figure 5 As shown, Figure 5 The circuit structure of the controlled switch circuit 111 is shown. In one embodiment, the controlled switch circuit 111 may include a positive switch circuit 1111, a negative switch circuit 1112, and an enabling circuit 1113. The positive switch circuit 1111 may be connected to the positive electrode of the parking device 3 and the positive electrode of the battery body 12, respectively. The positive switch circuit 1111 may be used to connect the positive electrode of the parking device 3 to the positive electrode of the battery body 12 in the on state. The positive switch circuit 1111 may be a switch circuit composed of one or more switch devices, which is not specifically limited here.

[0083] The negative electrode switch circuit 1112 can be connected to the power supply circuit 1122, the negative electrode of the parking device 3 and the negative electrode of the battery body 12 respectively. The negative electrode switch circuit 1112 can be used to connect the negative electrode of the negative battery body 12 of the parking device 3 to the negative electrode when the power supply circuit is powered and in the on state. The negative electrode switch circuit 1112 can be a switch circuit composed of one or more switch devices, which is not specifically limited here.

[0084] The enabling circuit 1113 can be connected to the control circuit 1123, the positive switch circuit 1111 and the negative switch circuit 1112 respectively. The enabling circuit 1113 can be used to trigger the enabling signal to control the positive switch circuit 1111 and the negative switch circuit 1112 to be turned on.

[0085] Specifically, when both the positive switch circuit 1111 and the negative switch circuit 1112 are not turned on, the positive switch circuit 1111 can disconnect the positive electrode of the parking device 3 from the positive electrode of the battery body 12, and the negative switch circuit 1112 can disconnect the negative electrode of the parking device 3 from the negative electrode of the battery body 12, so that the parking device 3 is powered only by the BMS module 13 when the BMS module 13 is not invalid. When the BMS module 13 fails, the control circuit 1123 can output an enable signal so that the enable circuit 1113 can operate. At this time, since the positive switch circuit 1111 is connected to the positive electrode of the battery body 12, the positive switch circuit 1111 can obtain a voltage, and the operation of the enable circuit 1113 enables the positive switch circuit 1111 and the battery body 12 to form a loop. At this time, the positive switch circuit 1111 can be internally turned on, so that the positive electrode of the parking device 3 can be connected to the positive electrode of the battery body 12. Similarly, since the negative switch circuit 1112 is connected to the power supply circuit 1122, the negative switch circuit 1112 can obtain voltage from the power supply circuit 1122. In addition, the operation of the enable circuit 1113 enables the negative switch circuit 1112 and the battery body 12 to form a loop. At this time, the negative switch circuit 1112 can be internally conductive, so that the negative electrode of the parking device 3 can be conductively connected to the negative electrode of the battery body 12. By setting the positive switch circuit and the negative switch circuit, the connection between the parking device and the battery body through the anti-parking brake circuit can be completely cut off, thereby reducing the parking device through the negative line and the positive line of the anti-parking brake circuit to form a loop, causing unnecessary power loss caused by the line and hindering the normal operation of the BMS module; and by setting the enable circuit, the positive switch circuit and the negative switch circuit can be simultaneously conductive, improving the reliability of the response when the BMS module fails.

[0086] In one embodiment, the positive switching circuit 1111 may specifically include one or more positive switching devices 11111 and a positive filtering circuit 11112. Figure 5 Taking the multiple positive switch devices 11111 shown as an example, the multiple positive switch devices 11111 are connected in series between the positive electrode of the parking device 3 and the positive electrode of the battery body 12, and the positive filter circuit 11112 is connected in parallel to the positive electrode of the battery body 12 and the control electrode of each positive switch device 11111. When the positive switch circuit 1111 and the battery body 12 can form a loop, the positive switch device 11111 can be turned on by the voltage difference formed by the positive filter circuit 11112, so that the positive electrode of the parking device 3 can be connected to the positive electrode of the battery body 12. Among them, the positive switch device 11111 can be an electronic MOS tube, an electronic triode, etc., which is not specifically limited here.

[0087] In one embodiment, the negative electrode switch circuit 1112 may specifically include a first negative electrode switch device 11121, one or more second negative electrode switch devices 11122, and a negative electrode filter circuit 11123. Figure 5 Taking the multiple second negative switch devices 11122 shown as an example, the multiple second negative switch devices 11122 are connected in series between the negative electrode of the parking device 3 and the negative electrode of the battery body 12, the positive electrode of the first negative switch device 11121 is connected to the power supply circuit 1122, and the negative filter circuit 11123 is connected in parallel between the power supply circuit 1122 and the control electrode of the first negative switch device 11121. The negative electrode of the first negative switch device 11121 is connected to the control electrode of each second negative switch device 11122 through a resistor, and the negative electrode of the first negative switch device 11121 is also connected to the negative electrode of the battery body 12 through multiple resistors. When the negative electrode switch circuit 1112 and the battery body 12 can form a loop, the first negative electrode switch device 11121 can be turned on by the voltage difference formed by the negative electrode filter circuit 11123, so that a voltage difference is formed between each second negative electrode switch device 11122 and the negative electrode of the battery body 12, so that each second negative electrode switch device 11122 can be turned on, and then the negative electrode of the parking device 3 can be connected to the negative electrode of the battery body 12. Among them, the first negative electrode switch device 11121 can be an electronic MOS tube, an electronic triode, etc., which is not specifically limited here. In addition, the second negative electrode switch device 11122 can be an electronic MOS tube, an electronic triode, etc., which is not specifically limited here.

[0088] In one embodiment, the enabling circuit 1113 may specifically include an enabling switch device 11131 and two enabling unidirectional diodes 11132. Figure 5As shown, the positive pole of an enabling unidirectional diode 11132 is connected to the positive pole filter circuit 11112, the positive pole of another enabling unidirectional diode 11132 is connected to the negative pole filter circuit 11123, the negative poles of the two enabling unidirectional diodes 11132 are connected to the positive pole of the enabling switch device 11131, the negative pole of the enabling switch device 11131 is connected to the negative pole of the battery body 12, and the control pole of the enabling switch device 11131 is connected to the control circuit 1123 through a resistor. When the control electrode of the enabling switch device 11131 receives the enabling signal, the enabling switch device 11131 will be turned on, so that the positive switch circuit 1111 forms a loop through the positive filter circuit 11112, the enabling unidirectional diode 11132 and the enabling switch device 11131, thereby driving the positive switch device 11111 to be turned on, and the negative switch circuit 1112 forms a loop through the negative filter circuit 11123, the enabling unidirectional diode 11132 and the enabling switch device 11131, thereby driving the first negative switch device 11121 to be turned on, and then driving the second negative switch device 11122 to be turned on.

[0089] Refer again Figure 3 As shown, in one embodiment, the control circuit 1123 can also be used to output a self-locking signal when the power supply circuit is powered; the power-on circuit 1121 can include a power-on trigger unit 11211 and a self-locking circuit 11212.

[0090] The power-on trigger unit 11211 may include a first switch device 11213, a cathode of the first switch device 11213 may be connected to the power supply circuit 1122, a control electrode of the first switch device 11213 may be connected to the first detection circuit 1131, and the power-on trigger unit 11211 may be used by the first detection circuit 1131 to control the first switch device 11213 to be turned on, so as to trigger the power supply circuit 1122 to be powered on. The first switch device 11213 may be an electronic MOS tube, an electronic triode, etc., which is not specifically limited here.

[0091] The self-locking circuit 11212 can be connected to the control electrode of the first switching device 11213 and the control circuit 1123 respectively. The self-locking circuit 11212 can be used to be turned on by a self-locking signal to keep the first switching device 11213 turned on.

[0092] Specifically, the first switch device 11213 is turned on through the first detection circuit 1131, thereby supplying power to the power supply circuit 1122. At this time, the controlled switch circuit 111 will be turned on. Then, when the controlled switch circuit 111 is turned on, since the BMS module failure detection circuit 113 is also connected to the parking device 3, the first detection circuit 1131 will be forced to store energy, resulting in the first detection circuit 1131 being unable to control the first switch device 11213 to be turned on. At this time, the power supply circuit 1122 will lose power, resulting in the controlled switch circuit 111 being cut off. At this time, the first detection circuit 1131 will release electrical energy to enable the first switch device 11213, so that the power supply circuit 1122 is powered again, and this process is repeated until the battery body 12 runs out of power or the driver turns off the ignition switch (that is, "turns off"). Although such repetition can ensure that the parking device 3 can obtain nearly uninterrupted power supply, due to the large number of switch devices, this repetitive behavior will actually generate certain ripples inside the anti-parking lock circuit 11, affecting the operation of the parking device 3. If the switch switching speed cannot meet certain conditions, the parking device 3 may also be directly locked. Therefore, a self-locking circuit 11212 is added on the basis of the power-on trigger unit 11211. After the control circuit 1123 is powered on for the first time, it can control the self-locking circuit 11212 to be turned on by outputting a self-locking signal. At this time, due to the conduction of the self-locking circuit 11212, the first switch device 11213 will remain turned on, and the first detection circuit 1131 will enter the energy storage state until the process of enabling the controlled switch circuit 111 is completed, and then the self-locking is released. In this way, the parking device 3 can obtain uninterrupted power supply, improve the operational stability of the parking device 3, and reduce the situation where the parking device 3 is still accidentally locked when the anti-parking lock circuit 11 is running.

[0093] In one embodiment, the self-locking circuit 11212 may include a self-locking switch device 11214, the positive electrode of the self-locking switch device 11214 is connected to the control electrode of the first switch device 11213 through a resistor, the negative electrode of the self-locking switch device 11214 is connected to the negative electrode of the battery body 12, and the control electrode of the self-locking switch device 11214 is connected to the control circuit 1123 through a resistor. The port to which the control electrode of the self-locking switch device 11214 is connected to the control circuit 1123 is different from the port to which the enabling circuit 1113 is connected to the control circuit 1123.

[0094] Reference Figure 6 As shown, Figure 6 1 shows a circuit structure of the second detection circuit 1132. In one embodiment, the second detection circuit 1132 may include a first energy storage capacitor 11321, a first diode 11322, a first voltage regulator diode 11323, a first resistor 11324, a first optical coupler 11325 and a second resistor 11326.

[0095] The positive electrode of the first energy storage capacitor 11321 is connected to the positive electrode of the parking device 3, the positive electrode of the first diode 11322 is connected to the negative electrode of the first energy storage capacitor 11321, the first voltage stabilizing diode 11323 is connected in parallel with the first diode 11322, the first resistor 11324 is connected to the negative electrode of the first energy storage capacitor 11321, the light emitting part in the first optocoupler 11325 is connected in series with the first resistor 11324, the receiving part in the first optocoupler 11325 is connected to the control circuit 1123, and the second resistor 11326 is connected in parallel to the positive electrode of the first energy storage capacitor 11321 and the negative electrode of the first diode 11322. Among them, the light emitting part refers to the part of the optocoupler that can convert an electrical signal into an optical signal and transmit it, and the light emitting part can be a light emitting diode (LED); the receiving part refers to the part of the optocoupler that can sense the optical signal and convert it into an electrical signal for output, and the receiving part can be a photosensitive diode, a photosensitive transistor, etc., which is not specifically limited here. In addition, the first energy storage capacitor 11321 may be an electrolytic capacitor or a chip capacitor, which is not specifically limited here. In addition, the number of the first resistor 11324 may be one or more, which is not specifically limited here.

[0096] Reference Figure 7 As shown, Figure 7 1 shows a circuit structure of the first detection circuit 1131. In one embodiment, the first detection circuit 1131 may include a second energy storage capacitor 11311, a second diode 11312, a second voltage regulator diode 11313, a third resistor 11314, a second optical coupler 11315 and a fourth resistor 11316.

[0097] The positive electrode of the second energy storage capacitor 11311 is connected to the positive electrode of the parking device 3, the positive electrode of the second diode 11312 is connected to the negative electrode of the second energy storage capacitor 11311, the second voltage stabilizing diode 11313 is connected in parallel with the second diode 11312, the third resistor 11314 is connected to the negative electrode of the second energy storage capacitor 11311, the light-emitting part in the second optocoupler device 11315 is connected in series with the third resistor 11314, the receiving part in the second optocoupler device 11315 is connected to the power-on circuit 1121, and the fourth resistor 11316 is connected in parallel to the positive electrode of the second energy storage capacitor 11311 and the negative electrode of the second diode 11312.

[0098] Refer again Figure 3 In one embodiment, the power-on trigger unit 11211 may further include a power-on filter circuit 11215 , a fifth resistor 11216 , a third voltage regulator diode 11217 and a third energy storage capacitor 11218 .

[0099] The power-on filter circuit 11215 is connected in parallel to the control electrode of the first switching device 11213 and the positive electrode of the first switching device 11213, the fifth resistor 11216 is connected to the control electrode of the first switching device 11213, and is connected in series to the receiving part in the second optocoupler device 11315, the negative electrode of the third voltage-stabilizing diode 11217 is connected in series to the receiving part in the second optocoupler device 11315, and the third energy storage capacitor 11218 is connected in parallel to the positive electrode of the first switching device 11213 and the positive electrode of the third voltage-stabilizing diode 11217.

[0100] Refer again Figure 3 In one embodiment, the vehicle may further include a speed measuring device 4 for measuring the speed of the vehicle, and the control circuit 1123 is connected to the speed measuring device 4. The control circuit 1123 may also be used to obtain the speed of the vehicle through the speed measuring device 4 to output an enable signal for the speed. The enable signal for the speed refers to the control circuit 1123 performing a calculation based on the speed to obtain an enable signal that can gradually decelerate the vehicle. In addition, the number of speed measuring devices 4 may be one or more, which is not specifically limited here. In addition, the speed measuring device 4 may specifically be an encoder, a magnetoresistive sensor, an accelerometer, etc., which is not specifically limited here.

[0101] Specifically, after the control circuit 1123 obtains the vehicle speed, the reverse acceleration opposite to the current vehicle driving direction can be calculated based on the vehicle speed, and an enable signal corresponding to the reverse acceleration output can be used to smoothly decelerate the vehicle through the indirect power supply of the parking device until it stops smoothly. By outputting an enable signal for the vehicle speed based on the vehicle speed, the vehicle can smoothly decelerate until it stops, so that the vehicle can be stopped smoothly when the BMS fails unexpectedly, thereby ensuring the safety of the passengers on the vehicle.

[0102] An embodiment of the present application also provides a vehicle, which includes a motor control device, a parking device, and a power supply device provided by any of the above embodiments, wherein the parking device is connected to the motor control device, and the power supply device is respectively connected to the motor control device and the parking device.

[0103] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0104] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0105] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0106] In the embodiments of the present application, the term "module" or "unit" refers to a computer program or a part of a computer program that has a predetermined function and works together with other related parts to achieve a predetermined goal, and can be implemented in whole or in part by using software, hardware (such as processing circuits or memories), or a combination thereof. Similarly, a processor (or multiple processors or memories) can be used to implement one or more modules or units. In addition, each module or unit can be part of an overall module or unit that includes the function of the module or unit.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0109] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0110] The step numbers in the above method embodiment are only provided for the convenience of explanation and description, and no limitation is imposed on the order of the steps. The execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

Claims

1. A power supply device, applied to a vehicle, the vehicle comprising a motor control device and a parking device, the motor control device being connected to the parking device, characterized in that: The power supply device comprises a battery management system BMS module, a battery body and an anti-parking brake circuit, and the battery body, the BMS module and the motor control device are connected in sequence; The anti-parking brake circuit comprises: A controlled switch circuit, connected to the parking device and the battery body respectively, the controlled switch circuit is used to be turned on in an enabled state to supply power to the parking device; A power-on circuit, connected to the BMS module failure detection circuit and the battery body respectively, the power-on circuit is used to control conduction through the BMS module failure detection circuit; a power supply circuit connected to the power-on circuit, the power supply circuit being used to supply power when the power-on circuit is turned on; a control circuit, connected to the power supply circuit, the BMS module failure detection circuit and the controlled switch circuit respectively, wherein the control circuit is configured to trigger a BMS module failure signal when the power supply circuit is supplying power, and output an enable signal for enabling the controlled switch circuit; The BMS module failure detection circuit is connected in parallel to the parking device together with the controlled switch circuit. The BMS module failure detection circuit is used to store energy when the BMS module is not failed, so as to control the power-on circuit to be turned on and output the BMS module failure signal when the BMS module fails.

2. The power supply device according to claim 1, characterized in that: The BMS module failure detection circuit comprises: a first detection circuit, connected in parallel with the parking device together with the controlled switch circuit, and connected to the power-on circuit, the first detection circuit being used to store energy when the BMS module is not failed, so as to control the power-on circuit to be turned on when the BMS module fails; A second detection circuit is connected in parallel with the parking device together with the controlled switch circuit and is connected to the control circuit. The second detection circuit is used to store energy when the BMS module is not failed, so as to output a failure signal of the BMS module when the BMS module fails.

3. The power supply device according to claim 1, characterized in that: The controlled switch circuit comprises: A positive switch circuit is connected to the positive electrode of the parking device and the positive electrode of the battery body respectively, and the positive switch circuit is used to connect the positive electrode of the parking device to the positive electrode of the battery body in a conductive state; a negative electrode switch circuit, connected to the power supply circuit, the negative electrode of the parking device and the negative electrode of the battery body respectively, and the negative electrode switch circuit is used to connect the negative electrode of the parking device to the negative electrode of the battery body when the power supply circuit is supplied and the negative electrode is in a conducting state; The enabling circuit is connected to the control circuit, the positive switching circuit and the negative switching circuit respectively, and the enabling circuit is used to trigger the enabling signal to control the positive switching circuit and the negative switching circuit to be turned on.

4. The power supply device according to claim 2, characterized in that: The control circuit is also used to output a self-locking signal when the power supply circuit is supplying power; The power-on circuit comprises: A power-on trigger unit, comprising a first switch device, wherein a cathode of the first switch device is connected to the power supply circuit, a control electrode of the first switch device is connected to the first detection circuit, and the power-on trigger unit is used for the first detection circuit to control the first switch device to be turned on, so as to trigger the power supply circuit to be powered on; The self-locking circuit is connected to the control electrode of the first switching device and the control circuit respectively, and the self-locking circuit is used to be turned on by the self-locking signal to keep the first switching device turned on.

5. The power supply device according to claim 2, characterized in that: The second detection circuit comprises: a first energy storage capacitor, wherein a positive electrode of the first energy storage capacitor is connected to a positive electrode of the parking device; a first diode, wherein the anode of the first diode is connected to the cathode of the first energy storage capacitor; A first voltage stabilizing diode connected in parallel with the first diode; a first resistor connected to the negative electrode of the first energy storage capacitor; a first optocoupler device, wherein a light emitting portion of the first optocoupler device is connected in series with the first resistor, and a receiving portion of the first optocoupler device is connected with the control circuit; The second resistor is connected in parallel to the positive electrode of the first energy storage capacitor and the negative electrode of the first diode.

6. The power supply device according to claim 4, characterized in that: The first detection circuit comprises: a second energy storage capacitor, wherein a positive electrode of the second energy storage capacitor is connected to a positive electrode of the parking device; a second diode, wherein the anode of the second diode is connected to the cathode of the second energy storage capacitor; a second voltage stabilizing diode connected in parallel with the second diode; a third resistor connected to the negative electrode of the second energy storage capacitor; a second optocoupler device, wherein the light emitting portion of the second optocoupler device is connected in series with the third resistor, and the receiving portion of the second optocoupler device is connected with the power-on circuit; A fourth resistor is connected in parallel to the positive electrode of the second energy storage capacitor and the negative electrode of the second diode.

7. The power supply device according to claim 6, characterized in that: The power-on trigger unit also includes: A power-on filter circuit connected in parallel to the control electrode of the first switch device and the positive electrode of the first switch device; a fifth resistor, connected to the control electrode of the first switch device and connected in series with the receiving part of the second optical coupler device; a third voltage stabilizing diode, wherein a cathode of the third voltage stabilizing diode is connected in series to a receiving part of the second optical coupling device; The third energy storage capacitor is connected in parallel to the positive electrode of the first switch device and the positive electrode of the third voltage stabilizing diode.

8. The power supply device according to claim 1, characterized in that: The vehicle further comprises a speed measuring device for measuring the speed of the vehicle; The control circuit is connected to the speed measuring device, and the control circuit is further used to obtain the vehicle speed of the vehicle through the speed measuring device to output an enable signal for the vehicle speed.

9. A vehicle, characterized in that: The vehicle comprises: Motor control devices; A parking device connected to the motor control device; The power supply device according to any one of claims 1 to 8, wherein the power supply device is connected to the parking device and the motor control device respectively.

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