Vehicle-mounted power supply system, control method and vehicle

Abstract

The invention provides a vehicle-mounted power supply system, a control method and a vehicle, and relates to the technical field of vehicle-mounted power supply control, and the vehicle-mounted power supply system comprises an input on-off switch, and at least one of a positive high-voltage path and a negative high-voltage path arranged at the high-voltage side of a vehicle-mounted power supply module; the input on-off control circuit is arranged between the input on-off switch and the vehicle-mounted battery management system, takes electricity from the high-voltage side, and receives an input cut-off control signal generated by the micro-control unit and a locking / awakening signal generated by the vehicle-mounted battery management system when the high-voltage side and the vehicle-mounted power supply module are in a cut-off state; and the control module is used for controlling the input on-off switch to switch the off state and the on state between the high-voltage side and the vehicle-mounted power supply module, and setting a locking / awakening signal of the input on-off switch to be a preset state according to the input cut-off control signal. According to the vehicle-mounted power supply system provided by the invention, the standby loss of the vehicle-mounted power supply module can be greatly reduced.

Description

Technical Field

[0001] The present application belongs to the field of automobile technology, and in particular to the field of vehicle-mounted power supply control technology. Specifically, it relates to a vehicle-mounted power supply system, a control method and a vehicle. Background Art

[0002] With the development of electric vehicles, the application of on-board power modules is increasing. Almost all electric vehicle power modules are powered by high-voltage battery packs. Therefore, how to improve the efficiency of on-board power modules and reduce their power consumption is of great significance for reducing the energy consumption of high-voltage battery packs and improving the endurance of electric vehicles.

[0003] In the prior art, designers of electric vehicle on-board power supplies focus on how to improve the power conversion efficiency of the on-board power module itself. However, the improvement of the power conversion efficiency of the on-board power module is limited, especially when taking into account heavy-load efficiency, light-load efficiency and standby loss, they often lose sight of one while focusing on the other.

[0004] It is understandable that quite a number of vehicle-mounted power modules are in standby mode most of the time. In the standby state, the power module's power conversion efficiency is very low (often less than 50%). Although the power module in the standby state is not large, since this state lasts for a long time, its energy loss is also considerable. Therefore, how to minimize the standby loss of the vehicle-mounted power module is of great significance to reducing the energy consumption of the high-voltage battery pack and improving the endurance of electric vehicles. Summary of the invention

[0005] In view of at least one problem existing in the prior art, the present application provides an on-board power supply system, a control method and a vehicle, so as to reduce the standby loss of the on-board power module.

[0006] According to a first aspect of the present application, there is provided a vehicle-mounted power supply system, comprising:

[0007] An input on-off switch is provided in at least one of a positive high voltage path and a negative high voltage path on the high voltage side of the vehicle power module;

[0008] The input on-off control circuit is arranged between the input on-off switch and the vehicle-mounted battery management system, and draws power from the high-voltage side. When the high-voltage side and the vehicle-mounted power module are in a disconnected state, the input on-off control circuit receives an input cut-off control signal generated by a microcontroller unit and a lock / wake-up signal generated by the vehicle-mounted battery management system to control the input on-off switch to switch the disconnected state and the connected state between the high-voltage side and the vehicle-mounted power module, and maintains the current state of the lock / wake-up signal of the input on-off switch as a preset state according to the input cut-off control signal.

[0009] In some optional aspects of this embodiment, the preset state is used to maintain the off state of the input on-off switch; and the lock / wake-up signal generated by the on-board battery management system is used to change the preset state.

[0010] In some optional aspects of this embodiment, a vehicle-mounted power supply system further includes:

[0011] The first isolation device is arranged between the input on-off control circuit and the vehicle-mounted battery management system, and is used to forward the lock / wake-up signal to the input on-off control circuit.

[0012] In some optional embodiments of this embodiment, the microcontroller unit is arranged between the first isolation device and the vehicle-mounted battery management system, and the first isolation device is also used to forward the input cut-off control signal to the input on-off control circuit; and at least two signal channels are arranged in the first isolation device.

[0013] In some optional aspects of this embodiment, a vehicle-mounted power supply system further includes:

[0014] The second isolation device is arranged between the input on-off control circuit and the micro control unit, and is used for forwarding the input cut-off control signal to the input on-off control circuit.

[0015] According to a second aspect of the present application, a vehicle-mounted power supply control method applied to a vehicle-mounted power supply system is provided, the method comprising:

[0016] When the vehicle-mounted power module is required to be in a standby state, the input on-off control circuit receives an input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to cut off the connection between the high-voltage side and the vehicle-mounted power module according to the input cut-off control signal; wherein the input on-off control circuit takes power from the high-voltage side;

[0017] The input on-off control circuit sets the lock / wake-up signal of the input on-off switch being turned off to a preset state; and

[0018] When the vehicle-mounted power module is required to be in a working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle-mounted battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0019] In some optional aspects of this embodiment, the preset state is used to maintain the off state of the input on-off switch; and the lock / wake-up signal generated by the vehicle-mounted battery management system is used to change the preset state.

[0020] In some optional aspects of this embodiment, the input on-off control circuit sets the lock / wake-up signal of the input on-off switch being disconnected to a preset state before the input cut-off control signal attenuates.

[0021] In some optional embodiments of this embodiment, the input cutoff control signal is generated by the microcontroller unit according to an input cutoff control instruction; wherein the input cutoff control instruction is sent from the vehicle-mounted battery management system to the microcontroller unit.

[0022] In some optional embodiments of this embodiment, the lock / wake-up signal generated by the vehicle battery management system is forwarded to the input on-off control circuit by a first isolation device; wherein the first isolator is arranged between the input on-off control circuit and the vehicle battery management system.

[0023] In some optional aspects of this embodiment, the input cutoff control signal is forwarded by the first isolation device to the input on-off control circuit; wherein at least two signal channels are provided in the first isolation device.

[0024] In some optional aspects of this embodiment, the input cutoff control signal is forwarded to the input on-off control circuit by a second isolator; wherein the second isolator is arranged between the input on-off control circuit and the micro control unit.

[0025] According to a third aspect of the present application, a vehicle-mounted power supply control device is provided, the device comprising:

[0026] The switch disconnection module is used for, when the vehicle power module is required to be in a standby state, the input on-off control circuit receives the input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to disconnect the connection state between the high-voltage side and the vehicle power module according to the input cut-off control signal; wherein, the input on-off control circuit takes power from the high-voltage side;

[0027] A switch state maintaining module, used for the input on-off control circuit to set the lock / wake-up signal of the input on-off switch being disconnected to a preset state; and

[0028] The switch connection module is used for, when the on-board power module is required to be in a working state, the input on-off control circuit receives the lock / wake-up signal generated by the on-board battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0029] In some optional aspects of this embodiment, the preset state is used to maintain the off state of the input on-off switch; and the lock / wake-up signal generated by the vehicle-mounted battery management system is used to change the preset state.

[0030] In some optional aspects of this embodiment, the switch state maintaining module includes:

[0031] The switch state maintaining unit is used for the input on-off control circuit to set the lock / wake-up signal of the input on-off switch being disconnected to a preset state before the input cut-off control signal decays.

[0032] In some optional embodiments of this embodiment, the input cutoff control signal is generated by the microcontroller unit according to an input cutoff control instruction; wherein the input cutoff control instruction is sent from the vehicle-mounted battery management system to the microcontroller unit.

[0033] In some optional aspects of this embodiment, a vehicle-mounted power supply control device further includes:

[0034] The first isolator setting module is used to set the first isolation device between the input on-off control circuit and the vehicle battery management system; the lock / wake-up signal generated by the vehicle battery management system is forwarded to the input on-off control circuit by the first isolation device.

[0035] In some optional aspects of this embodiment, the input cutoff control signal is forwarded by the first isolation device to the input on-off control circuit; wherein at least two signal channels are provided in the first isolation device.

[0036] In some optional aspects of this embodiment, a vehicle-mounted power supply control device further includes:

[0037] The second isolator setting module is used to set the second isolator between the input on-off control circuit and the micro control unit; the input cut-off control signal is forwarded to the input on-off control circuit by the second isolator.

[0038] According to a fourth aspect of the present application, a vehicle is provided, comprising:

[0039] Power supply, load, and the above-mentioned vehicle power supply system.

[0040] According to a fifth aspect of the present application, an electronic device is provided, which can execute the control method of the second aspect or one or more of the multiple possible implementation modes of the second aspect.

[0041] According to the sixth aspect of the present application, a computer program product is provided, comprising a computer-readable code, or a non-volatile computer-readable storage medium carrying a computer-readable code. When the computer-readable code is executed in an electronic device, a processor in the electronic device executes the control method of the above-mentioned second aspect or one or several of the multiple possible implementation methods of the second aspect.

[0042] From the above description, it can be seen that the present application provides a vehicle-mounted power supply system, control method and vehicle, and the vehicle-mounted power supply system includes: an input on-off switch, which is arranged in at least one of the positive high-voltage path and the negative high-voltage path on the high-voltage side of the vehicle-mounted power module; an input on-off control circuit, which is arranged between the input on-off switch and the vehicle-mounted battery management system, and draws power from the high-voltage side. When the high-voltage side and the vehicle-mounted power module are in a disconnected state, the input cut-off control signal generated by the microcontroller unit and the lock / wake-up signal generated by the vehicle-mounted battery management system are received to control the input on-off switch to switch the disconnected state and the connected state between the high-voltage side and the vehicle-mounted power module, and the lock / wake-up signal of the input on-off switch is set to a preset state according to the input cut-off control signal.

[0043] The vehicle-mounted power supply system provided in this application can greatly reduce the standby loss of the vehicle-mounted power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 This is one of the structural schematic diagrams of the vehicle power supply system according to an embodiment of the present application;

[0046] Figure 2 This is a second structural schematic diagram of the vehicle power supply system according to an embodiment of the present application;

[0047] Figure 3 This is a third structural schematic diagram of the vehicle power supply system according to an embodiment of the present application;

[0048] Figure 4 This is a fourth structural schematic diagram of the vehicle power supply system according to an embodiment of the present application;

[0049] Figure 5 is a circuit diagram of a vehicle power supply system according to an embodiment of the present application;

[0050] Figure 6This is one of the structural schematic diagrams of the input on-off switch according to an embodiment of the present application;

[0051] Figure 7 This is a second structural schematic diagram of an input on-off switch according to an embodiment of the present application;

[0052] Figure 8 is an exemplary flow chart of a vehicle power supply control method according to an embodiment of the present application;

[0053] Fig. 9 is a signal logic timing diagram of a vehicle power supply control method according to an embodiment of the present application;

[0054] Fig.10 One of the block diagrams of a vehicle-mounted power supply control device in an embodiment of the present invention;

[0055] Fig.11 is a block diagram of the switch state maintaining module 20 in an embodiment of the present invention;

[0056] Fig.12 This is a second block diagram of a vehicle-mounted power supply control device in an embodiment of the present invention;

[0057] Fig.13 This is a block diagram of a vehicle-mounted power supply control device according to an embodiment of the present invention;

[0058] Fig.14 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention.

[0059] Reference numerals:

[0060] 1: Input on / off switch;

[0061] 2: Input on-off control circuit;

[0062] 3: On-board power module;

[0063] 4: On-board battery management system;

[0064] 5: first isolation device;

[0065] 6: Micro control unit;

[0066] 7: second isolation device;

[0067] 8: Delayed opening of control circuit;

[0068] 9: Input the power supply circuit of the on-off control circuit. DETAILED DESCRIPTION

[0069] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0070] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0071] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0072] To solve at least one of the problems raised in the background technology section, such as Figure 1 As shown, an embodiment of the present application provides a vehicle power supply system, including:

[0073] An input on-off switch 1 is provided on at least one of a positive high voltage path HV+ and a negative high voltage path HV- on the high voltage side of the vehicle power module 3;

[0074] The input on-off control circuit 2 is arranged between the input on-off switch 1 and the vehicle-mounted battery management system 4 (Battery Management System, BMS), and draws power from the high-voltage side. When the high-voltage side and the vehicle-mounted power module 3 are in a disconnected state, it receives the input cut-off control signal generated by the microcontroller unit and the lock / wake-up signal generated by the vehicle-mounted battery management system 4 to control the input on-off switch 1 to switch the disconnection state and the connection state between the high-voltage side and the vehicle-mounted power module 3, and sets the lock / wake-up signal of the input on-off switch 1 to a preset state according to the input cut-off control signal.

[0075] like Figure 2 , Figure 3 as well as Figure 4As shown, the input on-off switch 1 is respectively arranged on the positive high-voltage path HV+ on the high-voltage side (the input on-off switch is arranged only on HV+), the negative high-voltage path HV- on the high-voltage side (the input on-off switch is arranged only on HV-), and both the positive high-voltage path HV+ and the negative high-voltage path HV- on the high-voltage side (the input on-off switch is arranged on both HV+ and HV-, and the above three settings can realize the disconnection and connection between the vehicle power module 3 and the high-voltage side power supply by the input on-off switch 1). In terms of the difficulty of control, only setting the input on-off switch 1 on HV- is the simplest one (see Figure 5 as well as Figure 6 ).

[0076] When the vehicle power module 3 needs to enter the standby mode, the vehicle battery management system 4 issues an input cut-off control command to cut off the input voltage of the vehicle power module 3, thereby reducing its standby power consumption to a minimum.

[0077] When the vehicle power module 3 needs to enter the normal working mode, the vehicle battery management system 4 sends an input connection control instruction to connect the input voltage of the vehicle power module 3, so that the vehicle power module 3 resumes normal working. Specifically, a lock / wake-up signal is generated by the input connection control instruction and transmitted to the input on-off switch 1. The lock / wake-up signal is used to change the preset state of the lock / wake-up signal of the input on-off switch 1, so that the input on-off switch 1 is closed, so that the vehicle power module 3 enters the normal working mode.

[0078] It should be noted that the input on-off control circuit 2 needs to be powered from the high voltage side (see Figure 2 ), this is because after the input on-off switch 1 cuts off the circuit between the high-voltage side and the vehicle-mounted power module 3, if the input on-off control circuit 2 is set on the low-voltage side, the input on-off control circuit 2 will also lose power supply at this time, and it is impossible to maintain the lock / wake-up signal of the input on-off switch 1 in the preset state, and when the vehicle-mounted power module needs to be woken up, the lock / wake-up signal generated by the vehicle-mounted battery management system 4 is sent to the input on-off switch 1.

[0079] It is understandable that the vehicle power module 3 is a power management device specially designed for vehicles such as automobiles, and its main function is to convert the DC voltage of the vehicle battery into a voltage and current suitable for use by various electronic devices and systems.

[0080] The vehicle-mounted battery management system 4 is used to intelligently manage and maintain each battery unit, monitor the battery status, prevent the battery from being overcharged and over-discharged, and extend the battery life. The vehicle-mounted battery management system unit includes a BMS battery management system, a control module, a display module, a wireless communication module, electrical equipment, a battery pack for powering the electrical equipment, and a collection module for collecting battery information of the battery pack. The vehicle-mounted battery management system 4 is connected to the wireless communication module and the display module through a communication interface, the output end of the collection module is connected to the input end of the vehicle-mounted battery management system 4, the output end of the vehicle-mounted battery management system is connected to the input end of the control module, the control module is connected to the battery pack and the electrical equipment, and the vehicle-mounted battery management system is connected to the Server server through a wireless communication module.

[0081] In another optional manner of this embodiment, the preset state is used to maintain the disconnected state of the input on-off switch 1; and the lock / wake-up signal generated by the vehicle-mounted battery management system 4 is used to change the preset state.

[0082] It can be understood that when the high voltage side and the vehicle power module 3 are disconnected through the input on-off switch 1, the output voltage on the low voltage side disappears. At this time, in order to maintain the disconnected state between the high voltage side and the vehicle power module 3, it is necessary to set the lock / wake-up signal in the input on-off switch 1 to a preset state through the input on-off control circuit 2. The preset state can be a high level state or a low level state, but the preset state corresponds to the disconnected state of the input on-off switch 1.

[0083] It is understood that the lock / wake-up signal is a signal used to control the state of a device, especially in power management and system sleep / wake-up mechanisms.

[0084] In another optional method of this embodiment, continue to refer to Figure 1 , a vehicle power supply system, further comprising:

[0085] The first isolation device 5 is arranged between the input on-off control circuit 2 and the vehicle-mounted battery management system 4 , and is used to forward the lock / wake-up signal to the input on-off control circuit 2 .

[0086] Furthermore, the first isolation device 5 includes: an optical coupler, a magnetic isolator and a capacitive isolator. Specifically:

[0087] Optocouplers, magnetic isolators, and capacitive isolators are all components used for signal isolation. They use different isolation methods to achieve signal transmission between high-voltage side circuits and low-voltage side circuits, avoid noise interference, protect equipment safety, and improve system reliability.

[0088] Optocouplers use optical signals to isolate the input and output ends. They include an LED and a photosensitive element (such as a phototransistor or photodiode). When there is current at the input end, the LED emits light, and the photosensitive element senses the light signal and turns on, thereby transmitting the signal.

[0089] Magnetic isolators achieve isolation through the principle of electromagnetic induction. They contain a coupling transformer or a magnetic core structure to generate an isolation magnetic field, allowing signals to pass between the input and output ends without direct contact.

[0090] Capacitive isolators achieve isolation through capacitive coupling, using the electric field generated by AC signals on capacitors to couple signals, thereby electrically isolating the two ends.

[0091] In another alternative embodiment of this embodiment, see Figure 2 The microcontrol unit 6 (Single Chip Microcomputer, MCU) is arranged between the first isolation device 5 and the vehicle battery management system 4. The first isolation device 5 is also used to forward the input cut-off control signal to the input on-off control circuit 2; and at least two signal channels are arranged in the first isolation device 5 (that is, an isolator with at least two signal channels).

[0092] The low voltage side of the vehicle power module 3 is equipped with a micro control unit 6. The functions of the micro control unit 6 are:

[0093] (1) Monitor the working status of the vehicle power module 3, such as voltage, current, power, temperature and other information, and report it to the vehicle battery management system 4 through CAN communication;

[0094] 2) Receive instructions from the vehicle battery management system 4 through CAN communication (Controller Area Network, a serial communication protocol for real-time applications) to make corresponding changes in the working state.

[0095] In another alternative embodiment of this embodiment, see Figure 3 , a vehicle power supply system, further comprising:

[0096] The second isolation device 7 is disposed between the input on-off control circuit 2 and the micro control unit 6, and is used to forward the input cut-off control signal to the input on-off control circuit 2. It can be understood that in this manner, the first isolation device 5 and the second isolation device 7 only need to contain one signal channel, that is, the signal channel in the first isolation device 5 is used to transmit the lock / wake-up signal; the signal channel in the second isolation device 7 is used to transmit the input cut-off control signal.

[0097] In another alternative embodiment of this embodiment, see Figure 5 , a vehicle power supply system, further comprising:

[0098] The delayed opening control circuit 8 is used to eliminate the influence of the impact current generated when the vehicle power module 3 is powered on on the system.

[0099] The input on-off switch 1 includes: a first sub-switch Q1, a second sub-switch Q2 and a resistor R1; wherein the first sub-switch Q1 is connected in series with the resistor R1 and then connected to the input on-off control circuit 2; the second sub-switch Q2 is connected in parallel with the first sub-switch Q1 and then connected to the delayed turn-on control circuit 8.

[0100] Specifically, when Q31 is turned off, the voltage of the Switch node becomes high, and Q1 is turned on. However, for Q2, the voltage of the G pole of Q2 is equal to the voltage of C41. Due to the presence of R109, the voltage of C41 will rise slowly, so Q2 will be turned on later than Q1. On the other hand, when Q31 is turned on, due to the presence of D3, Q1 and Q2 will be turned off at the same time.

[0101] The input on-off switch 1 can be a simple switch, or a combination circuit including multiple switches and other components such as resistors and capacitors. Preferably, the input on-off switch 1 can be a semiconductor power switch such as a relay or MOSFET. Figure 6 and Figure 7 It should be noted that the device symbols in the drawings are only examples and do not constitute an improper limitation on the present application.

[0102] in Figure 6 Shown is a simple switch; Figure 7 What is shown is a switch combination: when the vehicle power module 3 switches from normal working mode to standby mode, both switches Q1 and Q2 need to be turned off at the same time; when the vehicle power module 3 switches from standby mode to normal working mode, Q1 needs to be turned on first. At this time, the resistor R1 connected in series with Q1 can limit the impact current. After the impact current process ends, Q2 is turned on.

[0103] In another alternative embodiment of this embodiment, see Figure 5 , a vehicle power supply system, further comprising:

[0104] The power supply circuit 9 of the input on-off control circuit obtains power from the high voltage side to the input on-off control circuit 2 .

[0105] From the above description, it can be seen that a vehicle power supply system provided by the present application includes: an input on-off switch, which is arranged in at least one of the positive high-voltage path and the negative high-voltage path on the high-voltage side of the vehicle-mounted power module; an input on-off control circuit, which is arranged between the input on-off switch and the vehicle-mounted battery management system, and draws power from the high-voltage side. When the high-voltage side and the vehicle-mounted power module are in a disconnected state, an input cut-off control signal generated by a microcontroller unit and a lock / wake-up signal generated by the vehicle-mounted battery management system are received to control the input on-off switch to switch the disconnected state and the connected state between the high-voltage side and the vehicle-mounted power module, and the lock / wake-up signal of the input on-off switch is set to a preset state according to the input cut-off control signal.

[0106] The vehicle-mounted power supply system provided in the present application can greatly reduce the standby loss of the vehicle-mounted power module.

[0107] Furthermore, based on the vehicle-mounted power supply system proposed in the aforementioned embodiment, another embodiment of the present application provides a vehicle, the vehicle comprising: a power supply, a load, and the aforementioned vehicle-mounted power supply system.

[0108] The vehicle power supply system connects the power supply and the load. The load is an electronic component that needs to consume power, including but not limited to: data center, gateway, car box, etc. The power supply can supply normal power.

[0109] To further illustrate the solution, based on the vehicle power supply system proposed in the above embodiment, another embodiment of the present application provides a vehicle power supply control method applied to the vehicle power supply system, such as Figure 8 as well as Fig. 9 As shown, the method includes:

[0110] Step 100: When the vehicle power module is required to be in a standby state, the input on-off control circuit receives an input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to cut off the connection between the high-voltage side and the vehicle power module according to the input cut-off control signal; wherein the input on-off control circuit draws power from the high-voltage side;

[0111] Step 200: The input on-off control circuit sets the lock / wake-up signal of the input on-off switch being disconnected to a preset state; and

[0112] Step 300: When the vehicle power module is required to be in working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0113] Fig. 9It is a signal logic timing diagram of the method corresponding to step 100 to step 300. When the battery management system requires the vehicle power module to switch from the normal working mode to the standby mode, the microcontroller unit of the vehicle power module is notified through CAN communication. The vehicle power microcontroller unit sends an output cut-off signal according to the instruction of the battery management system. The signal is transmitted to the high-voltage side through the isolation device, and the input on-off switch is controlled to switch to the off state by controlling the input on-off control circuit on the high-voltage side, and the lock / wake-up is set low (high) (setting high or low depends on the preset rules). The signal is transmitted to the input on-off control circuit on the high-voltage side through the isolation device, so that the circuit can maintain the input on-off switch in the off state after the input control signal disappears (the actual situation is that when the input of the vehicle power module is disconnected, the vehicle power module will stop working, the output voltage on the low-voltage side disappears, and the power supply of the microcontroller unit disappears).

[0114] Correspondingly, when the battery management system requires the on-board power module to switch from standby mode to normal working mode, it only needs to set the lock / wake-up signal high (low) (used to change the current state of the lock / wake-up signal), and transmit the signal to the input on-off control circuit on the high-voltage side through the isolation device, control the input on-off switch to turn on, and the on-board power module resumes input power supply and thus resumes normal operation.

[0115] In another optional manner of this embodiment, the preset state is used to maintain the disconnected state of the input on-off switch; and the lock / wake-up signal generated by the vehicle-mounted battery management system is used to change the preset state.

[0116] In another optional manner of this embodiment, the input on-off control circuit sets the lock / wake-up signal of the input on-off switch being disconnected to a preset state before the input cut-off control signal decays.

[0117] See also Fig. 9 The input on-off control circuit sets the lock / wake-up signal of the input on-off switch disconnected to a preset state. This action needs to be performed before the input cut-off control signal decays.

[0118] In another optional manner of this embodiment, the input cutoff control signal is generated by the micro control unit according to the input cutoff control instruction; wherein the input cutoff control instruction is sent from the vehicle-mounted battery management system to the micro control unit.

[0119] In another optional embodiment of the present invention, the lock / wake-up signal generated by the vehicle battery management system is forwarded to the input on-off control circuit by the first isolation device; wherein the first isolator is arranged between the input on-off control circuit and the vehicle battery management system.

[0120] In another optional manner of this embodiment, the input cut-off control signal is forwarded to the input on-off control circuit by the first isolation device, wherein at least two signal channels are provided in the first isolation device. That is, the first isolator in this embodiment is used to forward the input cut-off control signal and also to forward the lock / wake-up signal to the input on-off control circuit.

[0121] In another optional mode of this embodiment, the input cut-off control signal is forwarded to the input on-off control circuit by the second isolator; wherein the second isolator is arranged between the input on-off control circuit and the microcontroller unit. That is, the first isolator in this embodiment is only used to forward the lock / wake-up signal to the input on-off control circuit, while the second isolator is used to forward the input cut-off control signal to the input on-off control circuit.

[0122] From the above description, it can be seen that a vehicle power supply control method provided by the present application includes: when the vehicle power module is required to be in a standby state, the input on-off control circuit receives an input cut-off control signal generated by a microcontroller unit, and controls the input on-off switch to disconnect the connection between the high-voltage side and the vehicle power module according to the input cut-off control signal; wherein the input on-off control circuit draws power from the high-voltage side; the input on-off control circuit sets the lock / wake-up signal of the input on-off switch disconnected to a preset state; and when the vehicle power module is required to be in a working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0123] The vehicle-mounted power supply control method provided in the present application can greatly reduce the standby loss of the vehicle-mounted power module.

[0124] Based on the same inventive concept, the embodiments of the present application also provide a vehicle-mounted power supply control device, which can be used to implement the method described in the above embodiments, such as the following embodiments. Since the principle of solving the problem by the vehicle-mounted power supply control device is similar to that of the vehicle-mounted power supply control method, the implementation of the vehicle-mounted power supply control device can refer to the implementation of the vehicle-mounted power supply control method, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements predetermined functions. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0125] The embodiment of the present invention provides a specific implementation of a vehicle-mounted power supply control device capable of implementing a vehicle-mounted power supply control method, see Fig.10 , a vehicle-mounted power supply control device specifically includes the following contents:

[0126] The switch disconnection module 10 is used for, when the vehicle power module is required to be in a standby state, the input on-off control circuit receives the input cut-off control signal generated by the micro control unit, and controls the input on-off switch to disconnect the connection state between the high-voltage side and the vehicle power module according to the input cut-off control signal; wherein, the input on-off control circuit takes power from the high-voltage side;

[0127] The switch state maintaining module 20 is used for the input on-off control circuit to set the lock / wake-up signal of the input on-off switch being disconnected to a preset state; and

[0128] The switch connection module 30 is used for the input on-off control circuit to receive the lock / wake-up signal generated by the vehicle-mounted battery management system when the vehicle-mounted power module is required to be in a working state, and to control the input on-off switch to change the preset state according to the lock / wake-up signal.

[0129] In some optional aspects of this embodiment, the preset state is used to maintain the off state of the input on-off switch; and the lock / wake-up signal generated by the vehicle-mounted battery management system is used to change the preset state.

[0130] In some optional embodiments of this embodiment, see Fig.11 , the switch state maintaining module 20 includes:

[0131] The switch state maintaining unit 201 is used for the input on-off control circuit to set the lock / wake-up signal of the input on-off switch being disconnected to a preset state before the input cut-off control signal decays.

[0132] In some optional embodiments of this embodiment, the input cutoff control signal is generated by the microcontroller unit according to an input cutoff control instruction; wherein the input cutoff control instruction is sent from the vehicle-mounted battery management system to the microcontroller unit.

[0133] In some optional embodiments of this embodiment, see Fig.12 , a vehicle-mounted power supply control device, further comprising:

[0134] The first isolator setting module 40 is used to set the first isolation device between the input on-off control circuit and the vehicle battery management system; the lock / wake-up signal generated by the vehicle battery management system is forwarded to the input on-off control circuit by the first isolation device.

[0135] In some optional aspects of this embodiment, the input cutoff control signal is forwarded by the first isolation device to the input on-off control circuit; wherein at least two signal channels are provided in the first isolation device.

[0136] In some optional embodiments of this embodiment, see Fig.13 , a vehicle-mounted power supply control device, further comprising:

[0137] The second isolator setting module 50 is used to set the second isolator between the input on-off control circuit and the micro control unit; the input cut-off control signal is forwarded to the input on-off control circuit by the second isolator.

[0138] From the above description, it can be seen that a vehicle-mounted power supply control device provided by the present application includes: a switch disconnection module, which is used for when the vehicle-mounted power module is required to be in a standby state, the input on-off control circuit receives the input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to disconnect the connection state between the high-voltage side and the vehicle-mounted power module according to the input cut-off control signal; wherein the input on-off control circuit draws power from the high-voltage side; a switch state maintaining module, which is used for the input on-off control circuit to set the lock / wake-up signal of the input on-off switch disconnection to a preset state; and a switch connection module, which is used for when the vehicle-mounted power module is required to be in a working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle-mounted battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0139] The vehicle-mounted power supply control device provided in the present application can greatly reduce the standby loss of the vehicle-mounted power module.

[0140] The embodiment of the present application also provides a specific implementation of an electronic device that can implement all the steps in the vehicle-mounted power supply control method in the above embodiment, see Fig.14 , electronic equipment specifically includes the following:

[0141] Processor processor) 1201, memory memory) 1202, communication interface Communications Interface) 1203 and bus 1204;

[0142] The processor 1201, the memory 1202, and the communication interface 1203 communicate with each other through the bus 1204; the communication interface 1203 is used to realize information transmission between the server-side device and the user-side device and other related devices;

[0143] The processor 1201 is used to call the computer program in the memory 1202. When the processor executes the computer program, all the steps in the vehicle power supply control method in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0144] Step 100: When the vehicle-mounted power module is required to be in a standby state, the input on-off control circuit receives an input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to cut off the connection between the high-voltage side and the vehicle-mounted power module according to the input cut-off control signal; wherein the input on-off control circuit draws power from the high-voltage side;

[0145] Step 200: The input on-off control circuit sets the lock / wake-up signal of the input on-off switch being turned off to a preset state; and

[0146] Step 300: When the vehicle power module is required to be in working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0147] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the vehicle-mounted power supply control method in the above embodiments. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the vehicle-mounted power supply control method in the above embodiments are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0148] Step 100: When the vehicle-mounted power module is required to be in a standby state, the input on-off control circuit receives an input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to cut off the connection between the high-voltage side and the vehicle-mounted power module according to the input cut-off control signal; wherein the input on-off control circuit draws power from the high-voltage side;

[0149] Step 200: The input on-off control circuit sets the lock / wake-up signal of the input on-off switch being turned off to a preset state; and

[0150] Step 300: When the vehicle power module is required to be in working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

[0151] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0152] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0153] Although the present application provides method operation steps such as embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the device or user-end product in practice is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0154] For the convenience of description, the above devices are described in various modules according to their functions. Of course, when implementing the embodiments of this specification, the functions of each module can be implemented in the same or more software and / or hardware, or the module implementing the same function can be implemented by a combination of multiple sub-modules or sub-units. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, 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 through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0155] Those skilled in the art also know that, in addition to implementing the controller in a purely computer-readable program code, the controller can be made to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered as a hardware component, and the devices for implementing various functions included therein can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules for implementing the method and structures within the hardware component.

[0156] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0157] The memory may include non-permanent storage in a computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (RAM). The memory is an example of a computer-readable medium.

[0158] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, in the absence of contradiction, a person skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0159] The above is only an example of the embodiment of the present specification and is not intended to limit the embodiment of the present specification. For those skilled in the art, the embodiment of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiment of the present specification shall be included in the scope of the claims of the embodiment of the present specification.

Claims

1. A vehicle-mounted power supply system, characterized in that: include: An input on-off switch is provided in at least one of a positive high voltage path and a negative high voltage path on the high voltage side of the vehicle power module; The input on-off control circuit is arranged between the input on-off switch and the vehicle-mounted battery management system, and draws power from the high-voltage side. When the high-voltage side and the vehicle-mounted power module are in a disconnected state, the input on-off control circuit receives an input cut-off control signal generated by a microcontroller unit and a lock / wake-up signal generated by the vehicle-mounted battery management system to control the input on-off switch to switch the disconnected state and the connected state between the high-voltage side and the vehicle-mounted power module, and sets the lock / wake-up signal of the input on-off switch to a preset state according to the input cut-off control signal.

2. The vehicle-mounted power supply system according to claim 1, characterized in that: The preset state is used to maintain the disconnected state of the input on-off switch; the lock / wake-up signal generated by the vehicle-mounted battery management system is used to change the preset state.

3. The vehicle-mounted power supply system according to claim 1, characterized in that: Also includes: The first isolation device is arranged between the input on-off control circuit and the vehicle-mounted battery management system, and is used to forward the lock / wake-up signal to the input on-off control circuit.

4. The vehicle-mounted power supply system according to claim 3, characterized in that: The micro control unit is arranged between the first isolation device and the vehicle-mounted battery management system. The first isolation device is also used to forward the input cut-off control signal to the input on-off control circuit; and at least two signal channels are arranged in the first isolation device.

5. The vehicle-mounted power supply system according to claim 3, characterized in that: Also includes: The second isolation device is arranged between the input on-off control circuit and the micro control unit, and is used for forwarding the input cut-off control signal to the input on-off control circuit.

6. The vehicle-mounted power supply system according to any one of claims 1 to 5, characterized in that: Also includes: Delayed opening of control circuit; The input on-off switch includes: a first sub-switch, a second sub-switch and a resistor; wherein the first sub-switch is connected in series with the resistor and then connected to the input on-off control circuit; and the second sub-switch is connected in parallel with the first sub-switch and then connected to the delayed turn-on control circuit.

7. A vehicle-mounted power supply control method applied to the vehicle-mounted power supply system according to any one of claims 1 to 6, characterized in that: include: When the vehicle-mounted power module is required to be in a standby state, the input on-off control circuit receives an input cut-off control signal generated by the microcontroller unit, and controls the input on-off switch to cut off the connection between the high-voltage side and the vehicle-mounted power module according to the input cut-off control signal; wherein the input on-off control circuit draws power from the high-voltage side; The input on-off control circuit sets the lock / wake-up signal of the input on-off switch being disconnected to a preset state; as well as When the vehicle-mounted power module is required to be in a working state, the input on-off control circuit receives the lock / wake-up signal generated by the vehicle-mounted battery management system, and controls the input on-off switch to change the preset state according to the lock / wake-up signal.

8. The vehicle-mounted power supply control method according to claim 7, characterized in that: The preset state is used to maintain the disconnected state of the input on-off switch; the lock / wake-up signal generated by the vehicle-mounted battery management system is used to change the preset state.

9. The vehicle-mounted power supply control method according to claim 7, characterized in that: The input on-off control circuit sets the lock / wake-up signal of the input on-off switch being disconnected to a preset state before the input cut-off control signal decays.

10. The vehicle-mounted power supply control method according to claim 7, characterized in that: The input cut-off control signal is generated by the micro control unit according to the input cut-off control instruction; wherein the input cut-off control instruction is sent from the vehicle-mounted battery management system to the micro control unit.

11. The vehicle-mounted power supply control method according to claim 7, characterized in that: The lock / wake-up signal generated by the vehicle battery management system is forwarded to the input on-off control circuit by a first isolation device; wherein the first isolator is arranged between the input on-off control circuit and the vehicle battery management system.

12. The vehicle-mounted power supply control method according to claim 11, characterized in that: The input cut-off control signal is forwarded to the input on-off control circuit by the first isolation device; wherein at least two signal channels are provided in the first isolation device.

13. The vehicle-mounted power supply control method according to claim 11, characterized in that: The input cut-off control signal is forwarded to the input on-off control circuit by a second isolator; wherein the second isolator is arranged between the input on-off control circuit and the micro control unit.

14. A vehicle, characterized in that: The vehicle comprises: A power supply, a load, and a vehicle power supply system as claimed in any one of claims 1 to 6.

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