A method, device, electronic device and medium for switching control of power-on and power-off modes

Abstract

The present application discloses a switching control method, device, electronic device and medium for power-on and power-off modes; the method includes: when a preset event occurs in an electric vehicle at the current moment, obtaining the driving state of the electric vehicle and the power-on and power-off modes of the vehicle controller HCU of the electric vehicle at the current moment; determining the power-on and power-off modes of the HCU at the next moment according to the event occurring in the electric vehicle at the current moment, the driving state of the electric vehicle and the power-on and power-off modes of the HCU at the current moment; switching the power-on and power-off modes of the HCU at the current moment to the power-on and power-off modes of the HCU at the next moment at the next moment; and performing corresponding control operations on the electric vehicle based on the power-on and power-off modes of the HCU at the next moment. The embodiments of the present application can effectively control the modes involved in different high-voltage power-on and power-off modes, thereby improving the stability, safety and reliability of vehicle operation.

Description

Technical Field

[0001] The present invention relates to the field of automobile control technology, and in particular to a switching control method and device for power-on and power-off modes, an electronic device and a storage medium. Background Art

[0002] Electric vehicles are vehicles that obtain power output from electric drive systems. The motor can achieve a large drive torque output in the low speed range, so that the vehicle has better power responsiveness. Electric vehicles use power batteries to power the motor. On the one hand, they do not consume fuel. On the other hand, they can also recover energy during coasting and braking, ultimately achieving the goal of energy conservation and emission reduction.

[0003] Since electric vehicles have drive motors and power batteries, and the power batteries can be charged externally, slow charging or fast charging can be achieved by connecting a charging gun. Compared with traditional vehicles, there are more factors involved in the high-voltage power-on and power-off process of the vehicle, and the process of high-voltage power-on and power-off also involves switching between different modes. If the high-voltage power-on and power-off mode management and control cannot be effectively performed, it will inevitably affect the stability and safety of vehicle operation. A good high-voltage power-on and power-off mode switching control method plays a significant role in improving the stability and safety performance of vehicle operation. Therefore, how to accurately and effectively manage and strategically control the high-voltage power-on and power-off modes of electric vehicles is one of the key issues to be solved at present. Summary of the invention

[0004] The present application provides a switching control method, device, electronic device and medium for power on and off modes, which can effectively control the modes involved in different high-voltage power on and off modes, thereby improving the stability, safety and reliability of vehicle operation.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling switching between power-on and power-off modes, the method comprising:

[0006] When a preset event occurs in the electric vehicle at the current moment, the driving state of the electric vehicle and the power-on and power-off modes of the vehicle controller HCU of the electric vehicle at the current moment are obtained; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charge power-on mode, slow charge heating power-on mode, fast charge power-on mode, and fast charge heating power-on mode;

[0007] Determine the power on and off mode of the HCU at the next moment according to an event occurring at the current moment of the electric vehicle, the driving state of the electric vehicle, and the power on and off mode of the HCU at the current moment;

[0008] At the next moment, the power-on and power-off mode of the HCU at the current moment is switched to the power-on and power-off mode of the HCU at the next moment; and corresponding control operations are performed on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment.

[0009] In a second aspect, an embodiment of the present application further provides a switching control device for power-on and power-off modes, the device comprising: an acquisition module, a determination module and a switching module; wherein:

[0010] The acquisition module is used to acquire the driving state of the electric vehicle and the power-on and power-off modes of the vehicle controller HCU of the electric vehicle at the current moment when a preset event occurs in the electric vehicle at the current moment; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charge power-on mode, slow charge heating power-on mode, fast charge power-on mode, and fast charge heating power-on mode;

[0011] The determination module is used to determine the power-on and power-off mode of the HCU at the next moment according to the event occurring at the current moment of the electric vehicle, the driving state of the electric vehicle and the power-on and power-off mode of the HCU at the current moment;

[0012] The switching module is used to switch the power on and off mode of the HCU at the current moment to the power on and off mode of the HCU at the next moment at the next moment; and perform corresponding control operations on the electric vehicle based on the power on and off mode of the HCU at the next moment.

[0013] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0014] one or more processors;

[0015] a memory for storing one or more programs,

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the switching control method of the power-on and power-off modes described in any embodiment of the present application.

[0017] In a fourth aspect, an embodiment of the present application provides a storage medium on which a computer program is stored, and when the program is executed by a processor, the switching control method of the power-on and power-off modes described in any embodiment of the present application is implemented.

[0018] The embodiment of the present application proposes a switching control method, device, electronic device and storage medium for power-on and power-off modes. When a pre-set event occurs at the current moment in the electric vehicle, the driving state of the electric vehicle and the power-on and power-off modes of the HCU of the electric vehicle at the current moment are first obtained; then, according to the event occurring at the current moment in the electric vehicle, the driving state of the electric vehicle and the power-on and power-off modes of the HCU at the current moment, the power-on and power-off modes of the HCU at the next moment are determined; then, at the next moment, the power-on and power-off modes of the HCU at the current moment are switched to the power-on and power-off modes of the HCU at the next moment; and the corresponding control operation is performed on the electric vehicle based on the power-on and power-off modes of the HCU at the next moment. That is to say, in the technical solution of the present application, the high-voltage power-on and power-off modes of the electric vehicle are taken as a consideration, and the conditions of different modes are designed and developed, and the switching schemes of different modes are created, and the corresponding control strategy methods are formulated. Compared with the existing technical solutions, the present application develops different modes and their control strategy methods based on the operating characteristics of electric vehicles, which improves the stability, safety and reliability of the operation of the high-voltage power-on and power-off processes of the vehicle. In the prior art, there is no high-voltage power-on and power-off mode switching control method with the vehicle controller as the core. Moreover, there are few methods and limited public information on mode switching and control strategies for the high-voltage power-on and power-off processes of electric vehicles. Therefore, compared with the prior art, the power-on and power-off mode switching control method, device, electronic device and storage medium proposed in the embodiments of the present application can effectively control the modes involved in different high-voltage power-on and power-off processes, thereby improving the stability, safety and reliability of vehicle operation; and the technical solution of the embodiments of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a first flow chart of a method for switching power-on and power-off modes provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of a high voltage power-on and power-off control architecture provided in an embodiment of the present application;

[0021] Figure 3 A second flow chart of the method for switching between power-on and power-off modes provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the switching process of different modes provided in the embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of a switching control device for power-on and power-off modes provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only the parts related to the present application, rather than all structures, are shown in the accompanying drawings.

[0026] Embodiment 1

[0027] Figure 1 This is a first flow chart of the power-on / off mode switching control method provided by the embodiment of the present application. The method can be executed by a power-on / off mode switching control device or electronic device. The device or electronic device can be implemented by software and / or hardware. The device or electronic device can be integrated in any smart device with network communication function. Figure 1 As shown, the switching control method of the power-on and power-off modes may include the following steps:

[0028] S101. When a preset event occurs in the electric vehicle at the current moment, the driving state of the electric vehicle and the power-on and power-off modes of the HCU of the electric vehicle at the current moment are obtained; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charging power-on mode, slow charging and heating power-on mode, fast charging power-on mode, and fast charging and heating power-on mode.

[0029] In this step, when a pre-set event occurs in the electric vehicle at the current moment, the electronic device can obtain the driving state of the electric vehicle and the power-on and power-off mode of the HCU of the electric vehicle at the current moment; wherein, the power-on and power-off mode includes one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charging power-on mode, slow charging heating power-on mode, fast charging power-on mode, fast charging heating power-on mode. Specifically, the electric vehicle involved in this application may include an electric vehicle power system, which is mainly composed of components such as a drive motor, a power battery pack, a motor inverter, a DC converter, a charger, an air conditioning system, and a controller corresponding to each component. Among them, the controller includes a vehicle controller (Hybrid Control Unit, referred to as HCU), a motor controller (Motor Control Unit, referred to as MCU), a battery management system (Battery Management System, referred to as BMS), etc., and each controller communicates through a CAN network. In order to more effectively manage and control the high-voltage power-on and power-off modes of electric vehicles, four program modules are designed inside the HCU software. Figure 2This is a schematic diagram of the high voltage power-on and power-off control architecture provided in the embodiment of the present application. Figure 2 As shown, the internal modules of HCU may include: high-voltage power-on and power-off modules, motor control modules, battery management modules and fault handling modules; among them, the high-voltage power-on and power-off modules are an important module in the HCU vehicle control model, and a variety of high-voltage power-on and power-off related modes are defined in the high-voltage power-on and power-off modules. The high-voltage power-on and power-off modules collect relevant input information, including the driver's key operation status, vehicle power-on and power-off request signals, motor status signals, battery status signals, charging status signals, DCDC status signals and other input signals. The high-voltage power-on and power-off modules in the HCU realize the switching control between different modes in the high-voltage power-on and power-off modules according to external input signals, combined with the driver's operating requirements, vehicle and powertrain status. Furthermore, the working modes of the high-voltage power-on and power-off modules may include the following 8 modes: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charging power-on mode, slow charging and heating power-on mode, fast charging power-on mode, and fast charging and heating power-on mode. The HCU realizes the switching control between different modes inside the high-voltage power-on and power-off modules through the design of mode conditions and control strategy methods.

[0030] S102: Determine the power on and off mode of the HCU at the next moment according to the event occurring in the electric vehicle at the current moment, the driving state of the electric vehicle, and the power on and off mode of the HCU at the current moment.

[0031] In this step, the electronic device can determine the power-on and power-off mode of the HCU at the next moment according to the events occurring at the current moment of the electric vehicle, the driving state of the electric vehicle, and the power-on and power-off mode of the HCU at the current moment. Specifically, the electronic device can determine whether the electric vehicle satisfies the switching condition corresponding to any power-on and power-off mode at the current moment according to the events occurring at the current moment of the electric vehicle, the driving state of the electric vehicle, and the power-on and power-off mode of the HCU at the current moment; if the electric vehicle satisfies the switching condition corresponding to any power-on and power-off mode at the current moment, the electronic device can determine that the power-on and power-off mode of the HCU at the next moment is any power-on and power-off mode. That is to say, among the following 8 power-on and power-off modes, initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charging power-on mode, slow charging and heating power-on mode, fast charging power-on mode, and fast charging and heating power-on mode, each mode corresponds to its own switching condition. If the electric vehicle satisfies the switching condition corresponding to any power-on and power-off mode at the current moment, it can be determined that the power-on and power-off mode of the HCU at the next moment is any power-on and power-off mode. Specifically, the switching condition corresponding to the initialization mode is: the electric vehicle receives a low-voltage power-on request sent by the driver through the operating key at the current moment; the switching condition corresponding to the normal power-on mode is: the power-on and power-off modes of the HCU at the current moment are the initialization mode, and the electric vehicle receives a high-voltage power-on request sent by the driver through the operating key at the current moment; the switching condition corresponding to the slow charging power-on mode is: the power-on and power-off modes of the HCU at the current moment are the initialization mode, the electric vehicle has a slow charging gun connected, the electric vehicle is in a slow charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operating key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment; the switching condition corresponding to the fast charging power-on mode is: the power-on and power-off modes of the HCU at the current moment are the initialization mode, the electric vehicle has a fast charging gun connected, the electric vehicle is in a fast charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operating key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment. In addition, the switching conditions corresponding to the slow charging and heating power-on mode are: the power-on and power-off mode of the HCU at the current moment is the slow charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device of the electric vehicle meets the working conditions; the switching conditions corresponding to the fast charging and heating power-on mode are: the power-on and power-off mode of the HCU at the current moment is the fast charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device PTC of the electric vehicle meets the working conditions.In addition, the switching conditions corresponding to the normal power-off mode are: the HCU sends a charging stop command to the battery management module, the charger, heating device and air-conditioning system of the electric vehicle are in a disabled state, the battery management module sends a high-voltage power-off request command to the battery management system, the HCU receives a high-voltage power-off permission signal sent by the motor controller and the battery management system, and the bus voltage feedback received by the HCU from the motor controller is less than a predetermined threshold. In addition, the switching conditions corresponding to the fault power-off mode include: the power-off switching conditions during normal operation, the power-off switching conditions in the slow charging power-on mode, the power-off switching conditions in the slow charging and heating power-on mode, the power-off switching conditions in the fast charging power-on mode, and the power-off switching conditions in the fast charging and heating power-on mode; among which, the power-off switching conditions during normal operation are: a high-voltage power-on fault occurs in the electric vehicle, or a serious motor fault occurs in the electric vehicle, or a serious battery fault occurs in the electric vehicle; the power-off switching conditions in the slow charging power-on mode are: a slow charging prohibited fault occurs in the electric vehicle, or a slow charging and high-voltage power-on failure occurs in the electric vehicle; the power-off switching conditions in the slow charging and heating power-on mode are: a slow charging prohibited heating fault occurs in the electric vehicle, or a slow charging and heating high-voltage power-on failure occurs in the electric vehicle; the power-off switching conditions in the fast charging power-on mode are: a fast charging prohibited fault occurs in the electric vehicle, or a fast charging and high-voltage power-on failure occurs in the electric vehicle; the power-off switching conditions in the fast charging and heating power-on mode are: a fast charging prohibited heating fault occurs in the electric vehicle, or a fast charging and high-voltage power-on failure occurs in the electric vehicle.

[0032] S103, at the next moment, switching the power-on and power-off mode of the HCU at the current moment to the power-on and power-off mode of the HCU at the next moment; and performing corresponding control operations on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment.

[0033] In this step, the electronic device can switch the power-on and power-off mode of the HCU at the current moment to the power-on and power-off mode of the HCU at the next moment at the next moment; and perform corresponding control operations on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment. Specifically, the electronic device can first obtain the control mode corresponding to the power-on and power-off mode of the HCU at the next moment; and then perform corresponding control operations on the electric vehicle according to the control mode corresponding to the power-on and power-off mode of the HCU at the next moment.

[0034] The switching control method of the power-on and power-off mode proposed in the embodiment of the present application, when a pre-set event occurs at the current moment in the electric vehicle, first obtain the driving state of the electric vehicle and the power-on and power-off mode of the HCU of the electric vehicle at the current moment; then determine the power-on and power-off mode of the HCU at the next moment according to the event occurring at the current moment in the electric vehicle, the driving state of the electric vehicle and the power-on and power-off mode of the HCU at the current moment; then at the next moment, switch the power-on and power-off mode of the HCU at the current moment to the power-on and power-off mode of the HCU at the next moment; and perform corresponding control operations on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment. That is to say, in the technical solution of the present application, the high-voltage power-on and power-off mode of the electric vehicle is taken as a consideration point, and the conditions of different modes are designed and developed, and the switching schemes of different modes are created, and the corresponding control strategy methods are formulated. Compared with the existing technical solutions, the present application develops different modes and their control strategy methods based on the operating characteristics of electric vehicles, which improves the stability, safety and reliability of the operation of the high-voltage power-on and power-off process of the vehicle. In the prior art, there is no high-voltage power-on and power-off mode switching control method with the vehicle controller as the core. Moreover, there are few methods for mode switching and control strategies specifically for the high-voltage power-on and power-off processes of electric vehicles, and the public information is limited. Therefore, compared with the prior art, the power-on and power-off mode switching control method proposed in the embodiment of the present application can effectively control the modes involved in different high-voltage power-on and power-off processes, thereby improving the stability, safety and reliability of vehicle operation; and the technical solution of the embodiment of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications.

[0035] Embodiment 2

[0036] Figure 3 The second flow chart of the power-on / off mode switching control method provided in the embodiment of the present application is further optimized and expanded based on the above technical solution, and can be combined with the above optional implementation methods. Figure 3 As shown, the switching control method of the power-on and power-off modes may include the following steps:

[0037] S301. When a preset event occurs in the electric vehicle at the current moment, the driving status of the electric vehicle and the power-on and power-off modes of the HCU of the electric vehicle at the current moment are obtained; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charging power-on mode, slow charging and heating power-on mode, fast charging power-on mode, and fast charging and heating power-on mode.

[0038] The high voltage power-on and power-off modes and control methods in the embodiments of the present application mainly include:

[0039] 1. Initialization mode: The initialization mode is a mode before the vehicle is powered on at high voltage. When the driver operates the key to power on at low voltage, the vehicle-related controllers start to supply power. After the HCU controller CAN network wakes up, the vehicle is controlled to enter the initialization mode. The control method is as follows: 1) HCU sets the mode management in the high-voltage power-on and power-off modules to the initialization mode; 2) The charger, PTC, and HVAC are disabled; 3) HCU sends initialization instructions to MCU, BMS, and DCDC.

[0040] 2. Normal power-on mode: Normal power-on mode is when the HCU responds to the driver's high-voltage power-on request, that is, when the driver operates the key KeyStart. When the HCU is in initialization mode and the key state is KeyStart, the HCU controls the vehicle to enter the power-on mode. The control method is as follows: 1) The HCU sets the mode management in the high-voltage power-on and power-off modules to the power-on mode; 2) The HCU sends a pre-charge instruction to the DCDC; 3) The HCU sends a high-voltage power-on request instruction to the BMS through the battery control module, and receives a high-voltage power-on request permission signal from the BMS.

[0041] 3. Normal power-off mode: When the vehicle has a normal high-voltage power-off request, for example, the driver operates the key from KeyStart to KeyOn to KeyOff, the HCU controls the vehicle to enter the high-voltage power-off mode, and the control method is as follows: 1) The HCU sets the mode management in the high-voltage power-on and power-off modules to the power-off mode; 2) The high-voltage power-on and power-off modules inside the HCU send a charging stop command to the battery control module; 3) The charger, PTC, and HVAC are prohibited from being enabled; 4) The HCU sends a high-voltage power-off request command to the BMS through the internal battery control module; 5) The HCU receives the high-voltage power-off permission signal sent by the MCU and the BMS; 6) The bus voltage fed back by the MCU received by the HCU is less than a certain value (for example, 15V); 7) The vehicle high-voltage power-off is completed, and each controller enters sleep after a specified time.

[0042] IV. Fault power-off mode: (1) During vehicle operation, when any of the following conditions is met, the HCU controls the vehicle to enter the fault power-off mode: 1) The vehicle has a high-voltage power-on fault; 2) The vehicle has a serious motor fault; 3) The vehicle has a serious battery fault. (2) In the slow charging power-on mode, when any of the following conditions is met, the HCU controls the vehicle to enter the fault power-off mode: 1) The vehicle has a slow charging prohibited fault; 2) The vehicle has a slow charging high-voltage power-on failure. (3) In the slow charging heating power-on mode, when any of the following conditions is met, the HCU controls the vehicle to enter the fault power-off mode: 1) The vehicle has a slow charging prohibited heating fault; 2) The vehicle has a slow charging heating high-voltage power-on failure. (4) In the fast charging power-on mode, when any of the following conditions is met, the HCU controls the vehicle to enter the fault power-off mode: 1) The vehicle has a fast charging prohibited fault; 2) The vehicle has a fast charging high-voltage power-on failure. (5) In the fast charging heating power-on mode, when any of the following conditions is met, the HCU controls the vehicle to enter the fault power-off mode: 1) The vehicle has a fault that prohibits fast charging heating; 2) The vehicle fails to power on the high voltage of fast charging heating. The fault power-off mode control method is as follows: (1) The HCU sets the mode management in the high-voltage power-on and power-off modules to the fault power-off mode; (2) The HCU sends a motor power-off command to the MCU through the motor control module; (3) The HCU sends a high-voltage relay disconnect command to the BMS through the battery control module; (4) If the BMS feedback indicates that power-off is allowed or the feedback times out (such as 15s), the vehicle continues to be controlled to power off; (5) If the high-voltage power-on and power-off modules recognize that the high-voltage power-off is successful or the feedback times out (such as 10s), the vehicle power-off is completed.

[0043] 5. Slow charging mode: This mode manages the power-on of electric vehicles during AC slow charging, and controls the charger, DCDC, BMS and MCU according to the power-on requirements. (1) Vehicle conditions for slow charging: 1) The vehicle has a slow charger (charging gun) connected; 2) The battery has a slow charging request; 3) The shift lever is in P gear; 4) The vehicle is stationary (for example, the speed is less than 3km / h); 5) The vehicle key status is KeyOff; 6) The vehicle has no faults that prohibit AC charging. (2) Slow charging control method: 1) When the vehicle is in the slow charging process, if the driver operates the key to turn on the high voltage, or remotely starts the high voltage, the HCU sets the mode in the high voltage upper and lower power modules to the slow charging mode and jumps to step 2); 2) The high voltage upper and lower power modules inside the HCU send a slow charging request instruction to the battery control module. If the battery control module returns a slow charging request permission signal, jump to step 3); 3) The HCU sends a slow charging request instruction to the BMS. If the BMS feedbacks a slow charging request permission signal, jump to step 4); 4) The HCU sends an enable instruction to the DCDC. When the DCDC feedbacks that the enablement is complete, jump to step 5); 5) The HCU sends a slow charging request instruction to the charger. If the charger feedbacks a slow charging request permission signal, jump to step 6); 6) The HCU controls the vehicle to complete the slow charging high voltage power-up.

[0044] 6. Slow charging and heating power-on mode: This mode manages the power-on of electric vehicles during AC slow charging and heating, and controls the charger, DCDC, BMS and MCU according to the power-on requirements. (1) The vehicle is in slow charging and heating conditions: 1) The vehicle has a slow charging (charging gun) connection; 2) The battery has a slow charging request; 3) The battery has a heating request; 4) The shift lever is in P gear; 5) The vehicle is stationary (for example, the speed is less than 3km / h); 6) The vehicle key status is KeyOff; 7) The vehicle has no faults that prohibit AC charging. (2) Slow charging and heating power-on control method: 1) When the vehicle is in the process of slow charging and heating, if the driver operates the key to turn on the high voltage, or the vehicle remotely starts the high voltage, the HCU sets the mode in the high voltage upper and lower power modules to the slow charging and heating power-on mode and jumps to step 2); 2) The high voltage upper and lower power modules inside the HCU send a slow charging and heating power-on request instruction to the battery control module. If the battery control module returns a slow charging and heating power-on request permission signal, jump to step 3); 3) The HCU sends a slow charging and heating power-on request instruction to the BMS. If the BMS feedbacks a slow charging and heating power-on request permission signal, jump to step 4); 4) The HCU sends a PTC charging and heating instruction to the BMS through the battery control module, and the PTC starts heating and continues for a period of time (such as 3s, which can be calibrated); 5) The HCU sends an enable instruction to the DCDC. When the DCDC feedback indicates that the enable is complete, jump to step 6); 6) The HCU controls the vehicle to complete the slow charging and high voltage heating power-on.

[0045] 7. Fast charging mode: This mode manages the power-on of electric vehicles during DC fast charging and controls the charger, DCDC, BMS and MCU according to the power-on requirements. (1) Vehicle fast charging conditions: 1) The vehicle has a fast charger (charging gun) connected; 2) The battery has a fast charging request; 3) The shift lever is in P gear; 4) The vehicle is stationary (for example, the speed is less than 3km / h); 5) The vehicle key status is KeyOff; 6) The vehicle has no faults that prohibit DC charging. (2) Fast charging power-on control method: 1) When the vehicle is in the fast charging process, if the driver operates the key to turn on the high voltage, or remotely starts the high voltage, the HCU sets the mode in the high voltage power-on and power-off module to the fast charging power-on mode and jumps to step 2); 2) The high voltage power-on and power-off module inside the HCU sends a fast charging request instruction to the battery control module. If the battery control module returns a fast charging request permission signal, jump to step 3); 3) The HCU sends a fast charging power-on request instruction to the BMS. If the BMS feedbacks a fast charging power-on request permission signal, jump to step 4); 4) The HCU sends an enable instruction to the DCDC. When the DCDC feedbacks that the enablement is completed, jump to step 5);

[0046] 5) HCU sends a fast charging request command to the charger. If the charger feeds back a slow charging request permission signal, it jumps to step 6); 6) HCU controls the vehicle to complete fast charging high voltage power-up.

[0047] 8. Fast charging and heating power-on mode: This mode manages the power-on of electric vehicles during the DC fast charging and heating process, and controls the charger, DCDC, BMS and MCU according to the power-on requirements. (1) The vehicle is in the slow charging and heating condition: 1) The vehicle has a fast charging (charging gun) connection; 2) The battery has a fast charging request; 3) The battery has a heating request; 4) The shift lever position is P gear; 5) The vehicle is stationary (for example, the speed is less than 3km / h); 6) The vehicle key status is KeyOff; 7) The vehicle has no faults that prohibit DC charging. (2) Fast charging heating power-on control method: 1) When the vehicle is in the fast charging heating process, if the driver operates the key to turn on the high voltage, or the vehicle remotely starts the high voltage, the HCU sets the mode in the high voltage upper and lower power modules to the fast charging heating power-on mode, and jumps to step 2); 2) The high voltage upper and lower power modules inside the HCU send a fast charging heating request instruction to the battery control module. If the battery control module returns a fast charging heating request permission signal, jump to step 3); 3) The HCU sends a slow charging heating power-on request instruction to the BMS. If the BMS feedbacks a slow charging heating power-on request permission signal, jump to step 4); 4) The HCU sends a PTC charging heating instruction to the BMS through the battery control module, and the PTC starts heating and continues for a period of time (such as 3s, which can be calibrated); 5) The HCU sends an enable instruction to the DCDC. When the DCDC feedback enables, jump to step 6); 6) The HCU controls the vehicle to complete the fast charging heating high voltage power-on.

[0048] S302: Determine whether the electric vehicle satisfies a switching condition corresponding to any power-on / off mode at the current moment according to an event occurring in the electric vehicle at the current moment, the driving state of the electric vehicle, and the power-on / off mode of the HCU at the current moment.

[0049] In a specific embodiment of the present application, the switching condition corresponding to the initialization mode is: the electric vehicle receives a low-voltage power-on request sent by the driver through the operation key at the current moment; the switching condition corresponding to the normal power-on mode is: the power-on and power-off modes of the HCU at the current moment are the initialization mode, and the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment; the switching condition corresponding to the slow charging power-on mode is: the power-on and power-off modes of the HCU at the current moment are the initialization mode, the electric vehicle has a slow charging gun connected, the electric vehicle is in a slow charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment; the switching condition corresponding to the fast charging power-on mode is: the power-on and power-off modes of the HCU at the current moment are the initialization mode, the electric vehicle has a fast charging gun connected, the electric vehicle is in a fast charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment. The switching conditions for the slow charging and heating power-on mode are: the power-on and power-off mode of the HCU at the current moment is the slow charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device of the electric vehicle meets the working conditions; the switching conditions for the fast charging and heating power-on mode are: the power-on and power-off mode of the HCU at the current moment is the fast charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device PTC of the electric vehicle meets the working conditions. The switching conditions for the normal power-off mode are: the HCU sends a charging stop instruction to the battery management module, the charger, heating device and air conditioning system of the electric vehicle are in a disabled state, the battery management module sends a high-voltage power-off request instruction to the battery management system, the HCU receives a high-voltage power-off permission signal sent by the motor controller and the battery management system, and the bus voltage fed back by the motor controller received by the HCU is less than a predetermined threshold.In addition, the switching conditions corresponding to the fault power-off mode include: the power-off switching conditions during normal operation, the power-off switching conditions in the slow charging power-on mode, the power-off switching conditions in the slow charging and heating power-on mode, the power-off switching conditions in the fast charging power-on mode, and the power-off switching conditions in the fast charging and heating power-on mode; among which, the power-off switching conditions during normal operation are: a high-voltage power-on fault occurs in the electric vehicle, or a serious motor fault occurs in the electric vehicle, or a serious battery fault occurs in the electric vehicle; the power-off switching conditions in the slow charging power-on mode are: a slow charging prohibited fault occurs in the electric vehicle, or a slow charging and high-voltage power-on failure occurs in the electric vehicle; the power-off switching conditions in the slow charging and heating power-on mode are: a slow charging prohibited heating fault occurs in the electric vehicle, or a slow charging and heating high-voltage power-on failure occurs in the electric vehicle; the power-off switching conditions in the fast charging power-on mode are: a fast charging prohibited fault occurs in the electric vehicle, or a fast charging and high-voltage power-on failure occurs in the electric vehicle; the power-off switching conditions in the fast charging and heating power-on mode are: a fast charging prohibited heating fault occurs in the electric vehicle, or a fast charging and high-voltage power-on failure occurs in the electric vehicle.

[0050] S303: If the electric vehicle satisfies a switching condition corresponding to any power-on / off mode at the current moment, determine that the power-on / off mode of the HCU at the next moment is any power-on / off mode.

[0051] S304, at the next moment, switch the power-on and power-off mode of the HCU at the current moment to the power-on and power-off mode of the HCU at the next moment; and perform corresponding control operations on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment.

[0052] Figure 4 The following is a schematic diagram of the switching process of different modes provided in the embodiment of the present application. Figure 4As shown, in the initialization mode, if the driver operates the key KeyStart to power on the high voltage, or starts the high voltage through remote start, the HCU controls the vehicle to enter the normal power-on mode; in the initialization mode, if the slow charging gun of the vehicle is connected and the vehicle is already in the slow charging state, if the driver operates the key KeyStart to power on the high voltage, or starts the high voltage through remote start, the HCU controls the vehicle to enter the slow charging power-on mode; in the initialization mode, if the fast charging gun of the vehicle is connected and the vehicle is already in the fast charging state, if the driver operates the key KeyStart to power on the high voltage, or starts the high voltage through remote start, the HCU controls the vehicle to enter the fast charging power-on mode; in the slow charging power-on mode, if the battery has a heating demand and the PTC can be enabled to work, the HCU controls the vehicle to enter the slow charging heating power-on mode; in the fast charging power-on mode, if the battery has a heating demand and the PTC can be enabled to work, the HCU controls the vehicle to enter the fast charging heating power-on mode. In the above different power-on modes, to enter the normal power-off mode, the following control conditions must be met: 1) The power-on and power-off modules inside the HCU send a charging stop command to the battery control module; 2) The charger, PTC, and HVAC are prohibited from being enabled; 3) The HCU battery control module sends a high-voltage power-off request command to the BMS; 4) The HCU receives the high-voltage power-off permission signal sent by the MCU and the BMS; 5) The bus voltage fed back by the MCU received by the HCU is less than a certain value; When 1) to 5) are met, the HCU control enters the normal power-off mode.

[0053] This application has different control methods in different modes. For example, in the slow charging high voltage power-on mode, the method to control the completion of slow charging high voltage power-on includes the following steps: 1) HCU is in initialization mode and the vehicle is in slow charging state; 2) The driver operates the key to turn on the high voltage, or remotely starts the high voltage; 3) The high voltage power-on and power-off modules inside the HCU send a slow charging power-on request instruction to the battery control module; 4) If the battery control module returns a slow charging power-on request permission signal, the HCU sends a slow charging power-on request instruction to the BMS; 5) If the BMS feeds back a slow charging power-on request permission signal, the HCU sends an enable instruction to the DCDC; 6) If the DCDC feeds back the enablement completion, the HCU sends a slow charging power-on request instruction to the charger; 7) If the charger feeds back a slow charging power-on request permission signal, the HCU controls the vehicle to complete the slow charging high voltage power-on; through 1) to 7), the HCU controls the vehicle to complete the slow charging high voltage power-on. In summary, through the internal module design of HCU, different modes and control strategy methods inside the high-voltage power-on and power-off modules were developed, switching schemes for different modes were formulated, and effective switching control of different modes was realized, which effectively improved the stability, safety and reliability of the vehicle's high-voltage power-on and power-off.

[0054] This application is based on the operating status of electric vehicles. By designing the internal high-voltage power-on and power-off module of the HCU, the conditions, strategies and control methods of different modes are formulated under this module, which can more effectively control the modes involved in different high-voltage power-on and power-off, thereby improving the stability, safety and reliability of vehicle operation. The key points are: 1) Design of the control system architecture of the high-voltage power-on and power-off mode of electric vehicles; 2) Formulate schemes for different high-voltage power-on and power-off modes of electric vehicles; 3) Switching control methods for different high-voltage power-on and power-off modes of electric vehicles; 4) Control methods for electric vehicles in slow-charging high-voltage power-on modes. This application can use the motor controller MCU to design and develop control strategies for different modes of high-voltage power-on and power-off of vehicles, but it will increase the workload of the MCU controller, and the MCU controller needs to collect more signals, and the motor software architecture needs to be changed. As the core controller of the whole vehicle, the HCU has a more comprehensive collaborative control judgment. The HCU can obtain the operating status signals of each power source and make a comprehensive judgment. Therefore, it is more appropriate to use the HCU to design and control different modes of high-voltage power-on and power-off.

[0055] The switching control method of the power-on and power-off mode proposed in the embodiment of the present application, when a pre-set event occurs at the current moment in the electric vehicle, first obtain the driving state of the electric vehicle and the power-on and power-off mode of the HCU of the electric vehicle at the current moment; then determine the power-on and power-off mode of the HCU at the next moment according to the event occurring at the current moment in the electric vehicle, the driving state of the electric vehicle and the power-on and power-off mode of the HCU at the current moment; then at the next moment, switch the power-on and power-off mode of the HCU at the current moment to the power-on and power-off mode of the HCU at the next moment; and perform corresponding control operations on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment. That is to say, in the technical solution of the present application, the high-voltage power-on and power-off mode of the electric vehicle is taken as a consideration point, and the conditions of different modes are designed and developed, and the switching schemes of different modes are created, and the corresponding control strategy methods are formulated. Compared with the existing technical solutions, the present application develops different modes and their control strategy methods based on the operating characteristics of electric vehicles, which improves the stability, safety and reliability of the operation of the high-voltage power-on and power-off process of the vehicle. In the prior art, there is no high-voltage power-on and power-off mode switching control method with the vehicle controller as the core. Moreover, there are few methods for mode switching and control strategies specifically for the high-voltage power-on and power-off processes of electric vehicles, and the public information is limited. Therefore, compared with the prior art, the power-on and power-off mode switching control method proposed in the embodiment of the present application can effectively control the modes involved in different high-voltage power-on and power-off processes, thereby improving the stability, safety and reliability of vehicle operation; and the technical solution of the embodiment of the present application is simple and convenient to implement, easy to popularize, and has a wider range of applications.

[0056] Embodiment 3

[0057] Figure 5 This is a schematic diagram of the structure of the switching control device for power-on and power-off modes provided in an embodiment of the present application. Figure 5 As shown, the switching control device for power-on and power-off modes includes: an acquisition module 501, a determination module 502 and a switching module 503; wherein,

[0058] The acquisition module 501 is used to acquire the driving state of the electric vehicle and the power-on and power-off modes of the vehicle controller HCU of the electric vehicle at the current moment when a preset event occurs in the electric vehicle at the current moment; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charge power-on mode, slow charge heating power-on mode, fast charge power-on mode, and fast charge heating power-on mode;

[0059] The determination module 502 is used to determine the power-on and power-off mode of the HCU at the next moment according to the event occurring at the current moment of the electric vehicle, the driving state of the electric vehicle and the power-on and power-off mode of the HCU at the current moment;

[0060] The switching module 503 is used to switch the power on and off mode of the HCU at the current moment to the power on and off mode of the HCU at the next moment at the next moment; and perform corresponding control operations on the electric vehicle based on the power on and off mode of the HCU at the next moment.

[0061] The above-mentioned power-on and power-off mode switching control device can execute the method provided by any embodiment of the present application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details not described in detail in this embodiment, please refer to the power-on and power-off mode switching control method provided by any embodiment of the present application.

[0062] Embodiment 4

[0063] Figure 6 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 6 A block diagram of an exemplary electronic device suitable for implementing the embodiments of the present application is shown. Figure 6 The electronic device 12 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0064] like Figure 6 As shown, the electronic device 12 is in the form of a general purpose computing device. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0065] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0066] The electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0067] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 6 not shown, usually called a "hard drive"). Although Figure 6 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical medium) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present application.

[0068] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0069] The electronic device 12 may also communicate with one or more external devices 14 (e.g., keyboards, pointing devices, displays 24, etc.), may communicate with one or more devices that enable a user to interact with the electronic device 12, and / or may communicate with any device that enables the electronic device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the electronic device 12 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20. As shown, the network adapter 20 communicates with other modules of the electronic device 12 via the bus 18. It should be understood that although Figure 6 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0070] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28, such as implementing the switching control method of the power-on and power-off modes provided in the embodiment of the present application.

[0071] Embodiment 5

[0072] An embodiment of the present application provides a computer storage medium.

[0073] The computer-readable storage medium of the embodiment of the present application can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, - but not limited to - a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive lists) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, a device or a device or used in combination with it.

[0074] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0075] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0076] Computer program code for performing the operation of the present application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (e.g., using an Internet service provider to connect through the Internet).

[0077] Note that the above are only preferred embodiments of the present application and the technical principles used. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A method for switching power-on and power-off modes, characterized in that: The method comprises: When a preset event occurs in the electric vehicle at the current moment, the driving state of the electric vehicle and the power-on and power-off modes of the vehicle controller HCU of the electric vehicle at the current moment are obtained; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charge power-on mode, slow charge heating power-on mode, fast charge power-on mode, and fast charge heating power-on mode; According to the events occurring in the electric vehicle at the current moment, the driving state of the electric vehicle and the power-on and power-off modes of the HCU at the current moment, it is determined whether the electric vehicle satisfies the switching condition corresponding to any power-on and power-off modes at the current moment; if the electric vehicle satisfies the switching condition corresponding to any power-on and power-off modes at the current moment, it is determined that the power-on and power-off mode of the HCU at the next moment is any of the power-on and power-off modes; wherein the switching condition corresponding to the initialization mode is: the electric vehicle receives a low-voltage power-on request sent by the driver by operating the key at the current moment; the switching condition corresponding to the normal power-on mode is: the power-on and power-off mode of the HCU at the current moment is The initialization mode, and the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment; the switching condition corresponding to the slow charging power-on mode is: the power-on and power-off mode of the HCU at the current moment is the initialization mode, the electric vehicle has a slow charging gun connected, the electric vehicle is in a slow charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment; the switching condition corresponding to the fast charging power-on mode is: the power-on and power-off mode of the HCU at the current moment is the initialization mode, the electric vehicle has a fast charging gun connected, the The electric vehicle is in a fast charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment; the switching condition corresponding to the slow charging and heating power-on mode is: the power-on and power-off mode of the HCU at the current moment is the slow charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device of the electric vehicle meets the working conditions; the switching condition corresponding to the fast charging and heating power-on mode is: the power-on and power-off mode of the HCU at the current moment is the fast charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device PTC of the electric vehicle meets the working conditions; the normal power-off The switching conditions corresponding to the mode are: the HCU sends a charging stop instruction to the battery management module, the charger, heating device and air-conditioning system of the electric vehicle are in a disabled state, the battery management module sends a high-voltage power-off request instruction to the battery management system, the HCU receives a high-voltage power-off permission signal sent by the motor controller and the battery management system, and the bus voltage fed back by the motor controller received by the HCU is less than a predetermined threshold; the switching conditions corresponding to the fault power-off mode include: power-off switching conditions during normal operation, power-off switching conditions in slow charging power-on mode, power-off switching conditions in slow charging heating power-on mode, power-off switching conditions in fast charging power-on mode, and power-off switching conditions in fast charging heating power-on mode;Among them, the power-off switching condition during the normal operation process is: the electric vehicle has a high-voltage power-on failure, or the electric vehicle has a serious motor failure, or the electric vehicle has a serious battery failure; the power-off switching condition in the slow charging power-on mode is: the electric vehicle has a slow charging prohibition failure, or the electric vehicle has a slow charging high-voltage power-on failure; the power-off switching condition in the slow charging heating power-on mode is: the electric vehicle has a slow charging prohibition heating failure, or the electric vehicle has a slow charging heating high-voltage power-on failure; the power-off switching condition in the fast charging power-on mode is: the electric vehicle has a fast charging prohibition failure, or the electric vehicle has a fast charging high-voltage power-on failure; the power-off switching condition in the fast charging heating power-on mode is: the electric vehicle has a fast charging prohibition heating failure, or the electric vehicle has a fast charging high-voltage power-on failure; At the next moment, the power-on and power-off mode of the HCU at the current moment is switched to the power-on and power-off mode of the HCU at the next moment; and corresponding control operations are performed on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment.

2. The method according to claim 1, characterized in that The corresponding control operation on the electric vehicle based on the power-on and power-off mode of the HCU at the next moment includes: Obtaining the control mode corresponding to the power-on and power-off modes of the HCU at the next moment; According to the control mode corresponding to the power-on and power-off mode of the HCU at the next moment, the electric vehicle is controlled accordingly.

3. A switching control device for power-on and power-off modes, characterized in that: The device comprises: an acquisition module, a determination module and a switching module; wherein, The acquisition module is used to acquire the driving state of the electric vehicle and the power-on and power-off modes of the vehicle controller HCU of the electric vehicle at the current moment when a preset event occurs in the electric vehicle at the current moment; wherein the power-on and power-off modes include one of the following: initialization mode, normal power-on mode, normal power-off mode, fault power-off mode, slow charge power-on mode, slow charge heating power-on mode, fast charge power-on mode, and fast charge heating power-on mode; The determination module is used to determine whether the electric vehicle satisfies the switching condition corresponding to any power-on and power-off mode at the current moment according to the event occurring at the electric vehicle at the current moment, the driving state of the electric vehicle and the power-on and power-off mode of the HCU at the current moment; if the electric vehicle satisfies the switching condition corresponding to any power-on and power-off mode at the current moment, then determine that the power-on and power-off mode of the HCU at the next moment is any of the power-on and power-off modes; wherein the switching condition corresponding to the initialization mode is: the electric vehicle receives a low-voltage power-on request sent by the driver through the operation key at the current moment; the switching condition corresponding to the normal power-on mode is: the HCU at the current moment The power-on and power-off mode is the initialization mode, and the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment; the switching condition corresponding to the slow charging power-on mode is: the power-on and power-off mode of the HCU at the current moment is the initialization mode, the electric vehicle has a slow charging gun connected, the electric vehicle is in a slow charging state, the electric vehicle receives a high-voltage power-on request sent by the driver through the operation key at the current moment, or the electric vehicle receives a high-voltage power-on instruction sent by the driver through remote operation at the current moment; the switching condition corresponding to the fast charging power-on mode is: the power-on and power-off mode of the HCU at the current moment is the initialization mode, the electric vehicle has a fast charging gun connected The switching condition corresponding to the slow charging and heating power-on mode is: the power-on and power-off mode of the HCU at the current moment is the slow charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device of the electric vehicle meets the working conditions; the switching condition corresponding to the fast charging and heating power-on mode is: the power-on and power-off mode of the HCU at the current moment is the fast charging power-on mode, the battery of the electric vehicle has a heating demand, and the heating device PTC of the electric vehicle meets the working conditions; the normal The switching conditions corresponding to the power-off mode are: the HCU sends a charging stop instruction to the battery management module, the charger, heating device and air-conditioning system of the electric vehicle are in a disabled state, the battery management module sends a high-voltage power-off request instruction to the battery management system, the HCU receives a high-voltage power-off permission signal sent by the motor controller and the battery management system, and the bus voltage fed back by the motor controller received by the HCU is less than a predetermined threshold; the switching conditions corresponding to the fault power-off mode include: power-off switching conditions during normal operation, power-off switching conditions in slow charging power-on mode, power-off switching conditions in slow charging and heating power-on mode, power-off switching conditions in fast charging power-on mode, and power-off switching conditions in fast charging and heating power-on mode;Among them, the power-off switching condition during the normal operation process is: the electric vehicle has a high-voltage power-on failure, or the electric vehicle has a serious motor failure, or the electric vehicle has a serious battery failure; the power-off switching condition in the slow charging power-on mode is: the electric vehicle has a slow charging prohibition failure, or the electric vehicle has a slow charging high-voltage power-on failure; the power-off switching condition in the slow charging heating power-on mode is: the electric vehicle has a slow charging prohibition heating failure, or the electric vehicle has a slow charging heating high-voltage power-on failure; the power-off switching condition in the fast charging power-on mode is: the electric vehicle has a fast charging prohibition failure, or the electric vehicle has a fast charging high-voltage power-on failure; the power-off switching condition in the fast charging heating power-on mode is: the electric vehicle has a fast charging prohibition heating failure, or the electric vehicle has a fast charging high-voltage power-on failure; The switching module is used to switch the power on and off mode of the HCU at the current moment to the power on and off mode of the HCU at the next moment at the next moment; and perform corresponding control operations on the electric vehicle based on the power on and off mode of the HCU at the next moment.

4. An electronic device, characterized in that: include: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors implement the switching control method of the power-on and power-off modes as described in any one of claims 1 to 2.

5. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the switching control method of the power-on and power-off modes according to any one of claims 1 to 2 is implemented.

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