Multi-power-supply power supply system for whole vehicle

Abstract

The invention provides a vehicle multi-power supply system, which belongs to the technical field of chassis domain control, and comprises a first power supply, a second power supply, a third power supply, a power supply redundancy module, a first MCU (Microprogrammed Control Unit), a second MCU, a first power supply module, a second power supply module, a power supply management module, a power supply circuit and a sensor, the first power source, the power source redundancy module, the second power source, the first power supply module, the first MCU, the power supply circuit and the sensor are sequentially connected in series, and the third power source, the second power supply module, the second MCU, the power supply circuit and the sensor are sequentially connected in series. The other end of the power management module is connected with the input end of the second power supply module. The technical problems that in the prior art, the power supply redundancy degree is low, and the power supply failure rate is high are solved.

Description

Technical Field

[0001] The present invention relates to the field of chassis domain control technology, and in particular to a multi-power supply system for a whole vehicle. Background Art

[0002] With the development of the automotive industry, the requirements for chassis wire control systems are getting higher and higher in terms of intelligence and high performance. The traditional split architecture no longer meets future needs, and domain control technology is gradually being recognized by the industry. As one of the four major domain controls for automobiles, chassis domain control has now attracted the attention of major automobile manufacturers and major automobile suppliers. Currently, chassis domain architecture is also in the research stage. Chassis domain architecture with high integration and fast responsiveness is of great help in reducing automobile costs and improving performance.

[0003] Chassis domain control technology is mainly aimed at the next generation of intelligent driving cars. The higher the level of intelligent driving, the higher the requirements for system safety redundancy, and the integration of multiple safety systems has higher requirements for system safety. In the existing dual-power independent power supply chassis domain architecture, the vehicle power supply adopts dual-power supply, and the two power supplies are completely independent, independently supplying power to the MCU, actuators, and sensors. If any node fails, all functions of this path will fail. The system failure rate is lower than that of the non-redundant single-power supply solution, but it is only reduced by half. There is still room for the system failure rate to decrease. Therefore, there are technical problems in the existing technology that the power supply redundancy is low and the power failure rate is high. Summary of the invention

[0004] In view of this, it is necessary to provide a vehicle multi-power supply system to solve the technical problems of low power redundancy and high power failure rate in the prior art.

[0005] In order to solve the above technical problems, on the one hand, the present invention provides a vehicle multi-power supply system, comprising: A first power supply, a second power supply, a third power supply, a power supply redundancy module, a first MCU, a second MCU, a first power supply module, a second power supply module, a power management module, a power supply circuit and a sensor; The first power supply, the power supply redundancy module, the second power supply, the first power supply module, the first MCU, the power supply circuit and the sensor are connected in series in sequence; The third power supply, the second power supply module, the second MCU, the power supply circuit and the sensor are connected in series in sequence; One end of the power management module is connected to the output end of the first power supply module, and the other end of the power management module is connected to the input end of the second power supply module; A power supply redundancy module, used to control the connection or disconnection of the first power supply and the second power supply; A power management module, used to control the connection or disconnection of the first power supply module and the second power supply module; The first MCU and the second MCU are both used to control the connection or disconnection of the power supply circuit.

[0006] In a possible implementation, the system further includes: a first EPS motor winding drive module, and the first EPS motor winding drive module is connected to a third power source.

[0007] In a possible implementation, the system further includes: a second EPS motor winding drive module, and the second EPS motor winding drive module is connected to the first power supply.

[0008] In a possible implementation, the system further includes: a first plunger motor driving module, and the first plunger motor driving module is connected to a third power supply.

[0009] In a possible implementation, the system further includes: a second plunger motor driving module, and the second plunger motor driving module is connected to the second power supply.

[0010] In a possible implementation, the system further includes: a first solenoid valve group driving module, and the first solenoid valve group driving module is connected to the third power supply.

[0011] In a possible implementation, the system further includes: a second solenoid valve group drive module, and the second solenoid valve group drive module is connected to the second power supply.

[0012] In a possible implementation, the system further includes: a first EPB motor drive module, and the first EPB motor drive module is connected to the second power supply.

[0013] In a possible implementation, the system further includes: a second EPB motor drive module, and the second EPB motor drive module is connected to the first power supply.

[0014] In one possible implementation, The third terminal of the power management module is connected to the power supply circuit.

[0015] The beneficial effects of the present invention are as follows: the vehicle multi-power supply system provided by the present invention comprises: a first power supply, a second power supply, a third power supply, a power supply redundancy module, a first MCU, a second MCU, a first power supply module, a second power supply module, a power management module, a power supply circuit and a sensor; the first power supply, the power supply redundancy module, the second power supply, the first power supply module, the first MCU, the power supply circuit and the sensor are connected in series in sequence; the third power supply, the second power supply module, the second MCU, the power supply circuit and the sensor are connected in series in sequence; one end of the power management module is connected to the output end of the first power supply module, and the other end of the power management module is connected to the input end of the second power supply module; one end of the power management module is connected to the output end of the first power supply module, and the other end of the power management module is connected to the input end of the second power supply module; the power supply redundancy module is used to control the connection or disconnection of the first power supply and the second power supply; the power management module is used to control the connection or disconnection of the first power supply module and the second power supply module; the first MCU and the second MCU are both used to control the connection or disconnection of the power supply circuit. The present invention is to solve the technical problems of low power redundancy and high power failure rate in the prior art. The power supply redundancy module controls the connection or disconnection of the first power supply and the second power supply, and adds a power management module to control the connection or disconnection of the first power supply module and the second power supply module, so that the two-way vehicle power supply is converted into 5V after passing through the power supply module and input to the power management module. The power management module uses OR gate processing to supply dual power to the redundant sensor. After being processed by this power management module, if any one of the 5V power supplies fails, the dual-way power supply of the sensor can still be guaranteed while adopting a redundant safety backup solution. The three-way vehicle power supply supplies the chassis domain integrated assembly, and the dual MCU information system control is used to control the connection or disconnection of the power supply circuit to power the whole vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of an embodiment of a vehicle multi-power supply system provided by the present invention; Figure 2 A diagram of the chassis domain controller architecture of an embodiment of the vehicle multi-power supply system provided by the present invention; Figure 3 This is an architecture diagram of an embodiment of the vehicle multi-power supply system provided by the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0019] In the description of the embodiments of the present application, unless otherwise specified, “plurality” means two or more than two.

[0020] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or equipment comprising a series of steps or modules is not necessarily limited to those steps or modules clearly listed, but may include other steps or modules not clearly listed or inherent to these processes, methods, products or equipment.

[0021] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] It should be noted that ESC (Electronic Stability Controller) is the electronic stability control system of the vehicle body; EPB (Electrical Park Brake) electronic parking brake system; CAN (Controller Area Network) controller area network; EPS (Electrical Power Steering) electronic power steering system; IBS (Intelligent Brake System) intelligent braking system.

[0024] The present invention provides a vehicle multi-power supply system 100, which is described below.

[0025] Figure 1 A schematic diagram of an embodiment of a vehicle multi-power supply system 100 provided by the present invention, Figure 2 A chassis domain controller architecture diagram of an embodiment of a vehicle multi-power supply system 100 provided by the present invention and Figure 3 The architecture diagram of an embodiment of the vehicle multi-power supply system 100 provided by the present invention includes: A first power supply 101, a second power supply 103, a third power supply 109, a power supply redundancy module 102, a first MCU (MircoController Unit, microcontroller) 105, a second MCU 106, a first power supply module 104, a second power supply module 110, a power management module 111, a power supply circuit 107 and a sensor 108; The first power supply 101, the power supply redundancy module 102, the second power supply 103, the first power supply module 104, the first MCU 105, the power supply circuit 107 and the sensor 108 are connected in series in sequence; The third power supply 109, the second power supply module 110, the second MCU 106, the power supply circuit 107 and the sensor 108 are connected in series in sequence; One end of the power management module 111 is connected to the output end of the first power supply module 104 , and the other end of the power management module 111 is connected to the input end of the second power supply module 110 ; A power supply redundancy module 102, used to control the connection or disconnection of the first power supply module 104 and the second power supply 103; A power management module 111, used to control the connection or disconnection of the first power supply module 104 and the second power supply module 110; The first MCU 105 and the second MCU 106 are both used to control the connection or disconnection of the power supply circuit 107 .

[0026] It is understandable that chassis domain control technology is mainly aimed at the next generation of intelligent driving cars. The higher the level of intelligent driving, the higher the requirements for system safety redundancy, and the integration of multiple safety systems has higher requirements for system safety. To solve this problem, the chassis domain control integrated system targeted by the present invention adopts dual MCU, dual-channel communication, dual actuators, and sensor 108 redundant safety backup, and the power supply adopts a multi-power redundancy solution to improve the safety and reliability of the system.

[0027] It should be noted that the present invention requires four sub-technologies: chassis domain control integration technology, multi-power supply redundancy technology, actuator power supply redundancy technology, MCU power supply redundancy technology, and sensor 108 power supply redundancy technology.

[0028] 1. Chassis domain control integration technology refers to the integration of the braking system IBS, ESC, and EPB control into onebox, and the integration of EPS controller in the onebox controller. The chassis wire control subsystem is used as a domain unified coordination control technology, which can handle chassis internal signal transmission, function arbitration, and communication and interaction with the whole vehicle or other domain control. The characteristics of this chassis domain control integration technology are redundant MCU, redundant actuator, redundant power supply, and redundant sensor 108.

[0029] 2. Multi-power supply redundancy technology refers to the technology that provides multiple power supplies for the entire vehicle and performs voltage redundancy management inside the controller.

[0030] 3. Actuator power redundancy technology refers to the technology of providing redundant power supply for actuator components.

[0031] 4. MCU power redundancy technology refers to the technology of providing redundant power supply for MCU.

[0032] 5. The redundant power supply technology for sensor 108 refers to a technology for providing redundant power supply for sensor 108 .

[0033] It is understandable that in Figure 2 In this application, the whole vehicle power supply is used to power the chassis domain integrated whole vehicle, and the chassis domain integration normally interacts with the whole vehicle through the CAN connection.

[0034] The chassis domain integrated assembly includes the chassis fusion control module, EPS control module, EPS drive module, EPB drive module, IBS control module, IBS drive module, ESC control module, ESC drive module, IBS / ESC actuator motor and valve group. The chassis fusion control module can realize the fusion control of braking and steering. The EPS control module and EPS drive module can realize the drive module control of the EPS motor. The EPB drive module receives the control instruction of the control module to drive the EPB brake to realize parking. The IBS / ESC control module, IBS / ESC drive module, actuator motor and valve group can realize vehicle braking and wheel braking force control.

[0035] The chassis domain integrated assembly has a redundant safety backup solution, three vehicle power supplies for the chassis domain integrated assembly, dual CAN for communication with the vehicle network, dual MCU information system control calculation, dual actuators, dual drive modules, and related sensors 108 also use a redundant backup solution. This improves system safety and reliability, and single point failure can ensure normal system output or degraded output, avoiding system function failure caused by single point failure.

[0036] It is necessary to further understand that the multi-power supply redundancy technology includes vehicle power supply redundancy management, actuator power supply redundancy technology, MCU power supply redundancy technology, and sensor 108 power supply redundancy technology. Figure 3 shown.

[0037] The whole vehicle power supply redundancy management provides three power supplies to the chassis domain integrated assembly, namely the first power supply 101, the second power supply 103, and the third power supply 109. A "power supply redundancy module 102" is provided between the first power supply 101 and the second power supply 103. When the first power supply 101 and the second power supply 103 are working normally, the "power supply redundancy module 102" is in a normally open state, and the first power supply 101 and the second power supply 103 independently supply power to the downstream. When any one of the power supplies fails, the "power supply redundancy module 102" is turned on, and the power supply at the non-failed end supplies power to both power supplies at the same time.

[0038] Actuator power redundancy technology: The chassis domain system actuator is designed to be redundant, and the actuator power supply is also designed to be redundant: (1) The EPS motor winding is divided into two paths, 1 and 2, which are independently powered by the first power supply 101 and the third power supply 109 respectively. When the first power supply 101 fails, the second power supply 103 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103, and the system can still retain 100% of its functions. When the third power supply 109 fails, the first power supply 101 can continue to supply power to the second motor winding, and the system can still retain 50% of the power output. If any two of the three power supplies fail, the system can still retain 50% of the power output.

[0039] (2) The EPB motor is divided into two sets of actuators, the front EPB motor and the rear EPB motor, which are independently powered by the first power supply 101 and the second power supply 103. When any power supply fails, the "power supply redundancy module 102" is turned on, and the power supply at the remaining end supplies power to both circuits at the same time, so that the system can still retain 100% of its functions.

[0040] (3) The IBS plunger motor is divided into two sets of actuators, the front plunger motor and the rear plunger motor, which are independently powered by the second power supply 103 and the third power supply 109 respectively. When the second power supply 103 fails, the first power supply 101 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103, and the system can still retain 100% of its functions. When the third power supply 109 fails, the second power supply 103 can continue to supply power to the front plunger motor, and the system can still retain 50% of the power output. If any two of the three power supplies fail, the system can still retain 50% of the power output.

[0041] (4) The ESC solenoid valve group is divided into two sets of actuators, the front solenoid valve group and the rear solenoid valve group, which are independently powered by the second power supply 103 and the third power supply 109 respectively. When the second power supply 103 fails, the first power supply 101 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103, and the system can still retain 100% of its functions. When the third power supply 109 fails, the second power supply 103 can continue to supply power to the front solenoid valve group, and the system can still retain 50% of its functions. If any two of the three power supplies fail, the system can still retain 50% of its functions.

[0042] MCU power redundancy technology, the chassis domain integrated assembly adopts a dual MCU architecture, and the second power supply 103 and the third power supply 109 simultaneously provide dual power to the MCU. When the second power supply 103 fails, the first power supply 101 continues to supply power through the "power supply redundancy module 102", and both MCUs can work normally. When the third power supply 109 fails, MCU 1 can still work normally, and the system retains 50% of its functions.

[0043] Sensor 108 power supply redundancy technology, the sensors 108 used in the chassis domain integration system are all redundant sensors 108, such as the steering wheel torque angle sensor 108, the electronic rotor position sensor 108, etc., which adopt a dual power supply and dual output solution. The second power supply 103 and the third power supply 109 provide dual power supply to the sensor 108 power supply circuit 107 through the power management module 111, and the MCU controls the closing and disconnection of the sensor 108 power supply circuit 107. Based on this design, the sensor 108 can work normally when any one of the first power supply 101, the second power supply 103, and the third power supply 109 fails, and the sensor 108 can also work normally when any two of them fail.

[0044] It should be further understood that the two vehicle power supplies are converted into 5V after passing through the power supply module and input to the power management module 111. The power management module 111 uses an OR gate to provide dual power to the redundant sensor 108. After being processed by the power management module 111, if any one of the 5V power supplies fails, the dual power supply of the sensor 108 can still be guaranteed.

[0045] In some embodiments of the present invention, the system further includes: a first EPS motor winding drive module, and the first EPS motor winding drive module is connected to the third power supply 109 .

[0046] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes an EPS dual-winding motor, and the EPS motor winding is divided into two paths, which are independently powered by the first power supply 101 and the third power supply 109. When the first power supply 101 fails, the second power supply 103 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103.

[0047] In some embodiments of the present invention, the system further includes: a second EPS motor winding drive module, and the second EPS motor winding drive module is connected to the first power supply 101 .

[0048] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes an EPS dual-winding motor, and the EPS motor winding is divided into two paths, which are independently powered by the first power supply 101 and the third power supply 109. When the first power supply 101 fails, the second power supply 103 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103.

[0049] In some embodiments of the present invention, the system further includes: a first plunger motor driving module, and the first plunger motor driving module is connected to the third power supply 109 .

[0050] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes a first plunger motor drive module and a second plunger motor drive module, which are independently powered by a second power supply 103 and a third power supply 109. When the second power supply 103 fails, the first power supply 101 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103.

[0051] In some embodiments of the present invention, the system further includes: a second plunger motor driving module, and the second plunger motor driving module is connected to the second power supply 103 .

[0052] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes a first plunger motor drive module and a second plunger motor drive module, which are independently powered by a second power supply 103 and a third power supply 109. When the second power supply 103 fails, the first power supply 101 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103.

[0053] In some embodiments of the present invention, the system further includes: a first solenoid valve group driving module, and the first solenoid valve group driving module is connected to the third power supply 109 .

[0054] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes a first solenoid valve group drive module and a second solenoid valve group drive module, which are independently powered by a second power supply 103 and a third power supply 109. When the second power supply 103 fails, the first power supply 101 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103.

[0055] In some embodiments of the present invention, the system further includes: a second solenoid valve group driving module, and the second solenoid valve group driving module is connected to the second power supply 103 .

[0056] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes a first solenoid valve group drive module and a second solenoid valve group drive module, which are independently powered by a second power supply 103 and a third power supply 109. When the second power supply 103 fails, the first power supply 101 can continue to supply power through the "power supply redundancy module 102" between the first power supply 101 and the second power supply 103.

[0057] In some embodiments of the present invention, the system further includes: a first EPB motor driving module, and the first EPB motor driving module is connected to the second power supply 103 .

[0058] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes a first EPB motor drive module and a second EPB motor drive module, which are independently powered by a first power supply 101 and a second power supply 103. When any power supply fails, the "power supply redundancy module 102" is turned on, and the power supply at the non-failed end supplies power to both circuits at the same time.

[0059] In some embodiments of the present invention, the system further includes: a second EPB motor driving module, and the second EPB motor driving module is connected to the first power supply 101 .

[0060] It can be understood that the vehicle multi-power supply system 100 provided by the present invention includes a first EPB motor drive module and a second EPB motor drive module, which are independently powered by a first power supply 101 and a second power supply 103. When any power supply fails, the "power supply redundancy module 102" is turned on, and the power supply at the non-failed end supplies power to both circuits at the same time.

[0061] In some embodiments of the present invention, a third terminal of the power management module 111 is connected to the power supply circuit 107 .

[0062] It can be understood that the present invention provides a chassis domain integrated assembly, the structural features of which are: Integrates the controller hardware and software of EPS, EPS, IBS and ESC systems.

[0063] A redundant safety backup solution is adopted, with three vehicle power supplies supplying power to the chassis domain integrated assembly, dual CANs communicating with the vehicle network, dual MCU information systems controlling calculations, dual actuators, and dual drive modules, and related sensors 108 also adopt a redundant backup solution.

[0064] What needs to be further understood is that the whole vehicle power supply redundancy management, the whole vehicle provides three power supplies to the chassis domain integrated assembly, namely the first power supply 101, the second power supply 103, and the third power supply 109, and a "power supply redundancy module 102" is provided between the first power supply 101 and the second power supply 103. When any one of the first power supply 101 and the second power supply 103 fails, the other one can supply power to both at the same time.

[0065] Actuator power redundancy technology: the chassis domain system actuators are designed to be redundant, and the actuator power supply is also designed to be redundant.

[0066] MCU power redundancy technology, the chassis domain integrated assembly adopts a dual MCU architecture, the second power supply 103 and the third power supply 109 simultaneously provide dual power supplies for the MCU, and a power management module 111 is provided between the second power supply 103, the third power supply 109 and the MCU.

[0067] Sensor 108 power redundancy technology, the sensors 108 used in the chassis domain integration system are all redundant sensors 108, using dual power supplies and dual output solutions. The second power supply 103 and the third power supply 109 provide dual power to the sensor 108 power supply circuit 107 through the power management module 111, and the MCU controls the closing and disconnection of the sensor 108 power supply circuit 107.

[0068] It is necessary to further understand that the two vehicle power supplies are converted into 5V after passing through the power supply module and input to the power management module 111. The power management module 111 uses an OR gate to provide dual power to the redundant sensor 108. After being processed by the power management module 111, if any one of the 5V power supplies fails, the dual power supply of the sensor 108 can still be guaranteed.

[0069] The vehicle multi-power supply system provided by the present invention includes: a first power supply, a second power supply, a third power supply, a power supply redundancy module, a first MCU, a second MCU, a first power supply module, a second power supply module, a power management module, a power supply circuit and a sensor; the first power supply, the power supply redundancy module, the second power supply, the first power supply module, the first MCU, the power supply circuit and the sensor are connected in series in sequence; the third power supply, the second power supply module, the second MCU, the power supply circuit and the sensor are connected in series in sequence; one end of the power management module is connected to the output end of the first power supply module, and the other end of the power management module is connected to the input end of the second power supply module. In order to solve the technical problems of low power redundancy and high power failure rate in the prior art, the present invention controls the connection or disconnection of the first power supply and the second power supply through the power supply redundancy module, and adds a power management module to control the connection or disconnection of the first power supply module and the second power supply module, so that the two-way vehicle power supply is converted into 5V after passing through the power supply module and input to the power management module, and the power management module uses OR gate processing to supply dual power to the redundant sensor. After being processed by this power management module, if any 5V power supply fails, the sensor can still be powered by two channels while adopting a redundant safety backup solution. The three-channel vehicle power supply supplies power to the chassis domain integrated assembly, and the dual MCU information system control is used to control the connection or disconnection of the power supply circuit to power the entire vehicle.

[0070] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or decorations made according to the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A vehicle multi-power supply system, characterized in that: include: A first power supply, a second power supply, a third power supply, a power supply redundancy module, a first MCU, a second MCU, a first power supply module, a second power supply module, a power management module, a power supply circuit and a sensor; The first power supply, the power supply redundancy module, the second power supply, the first power supply module, the first MCU, the power supply circuit and the sensor are connected in series in sequence; The third power supply, the second power supply module, the second MCU, the power supply circuit and the sensor are connected in series in sequence; One end of the power management module is connected to the output end of the first power supply module, and the other end of the power management module is connected to the input end of the second power supply module; A power supply redundancy module, used to control the connection or disconnection of the first power supply and the second power supply; A power management module, used to control the connection or disconnection of the first power supply module and the second power supply module; The first MCU and the second MCU are both used to control the connection or disconnection of the power supply circuit.

2. The vehicle multi-power supply system according to claim 1, characterized in that: The system also includes: a first EPS motor winding drive module, and the first EPS motor winding drive module is connected to the third power supply.

3. The vehicle multi-power supply system according to claim 2, characterized in that: The system also includes: a second EPS motor winding drive module, and the second EPS motor winding drive module is connected to the first power supply.

4. The vehicle multi-power supply system according to claim 3, characterized in that: The system also includes: a first plunger motor driving module, and the first plunger motor driving module is connected to the third power supply.

5. The vehicle multi-power supply system according to claim 4, characterized in that: The system also includes: a second plunger motor driving module, and the second plunger motor driving module is connected to the second power supply.

6. The vehicle multi-power supply system according to claim 5, characterized in that: The system also includes: a first solenoid valve group driving module, and the first solenoid valve group driving module is connected to the third power supply.

7. The vehicle multi-power supply system according to claim 6, characterized in that: The system also includes: a second solenoid valve group driving module, and the second solenoid valve group driving module is connected to the second power supply.

8. The vehicle multi-power supply system according to claim 7, characterized in that: The system also includes: a first EPB motor driving module, and the first EPB motor driving module is connected to the second power supply.

9. The vehicle multi-power supply system according to claim 8, characterized in that: The system also includes: a second EPB motor drive module, and the second EPB motor drive module is connected to the first power supply.

10. The vehicle multi-power supply system according to claim 9, characterized in that: The third terminal of the power management module is connected to the power supply circuit.

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