Vehicle power-on / off control methods, vehicle and computer-readable storage medium

Abstract

This invention discloses a vehicle power-on / off control method, a vehicle, and a computer-readable storage medium. The method includes: acquiring the current state of the vehicle, wherein the current state includes at least one of the following: key state, charging port state, discharging port state, gear position state, whether a charging request has been received, and whether a battery heating request has been received; determining a target control mode for the vehicle based on the current state, wherein the target control mode includes one of the following: driving mode, AC charging mode, DC charging mode, AC charging heating mode, DC charging heating mode, and discharging mode; and controlling the vehicle to power on or off based on a control strategy of the target control mode. This invention solves the technical problem that vehicle power-on / off control methods are not compatible with multiple control modes.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically, to a method for controlling the power on / off of a vehicle, a vehicle, and a computer-readable storage medium. Background Technology

[0002] Compared to traditional vehicles, hybrid vehicles have more complex powertrain systems, involving the coordinated operation of components such as the engine, electric motor, battery, charger, and high-voltage components like the DC-DC converter. Furthermore, hybrid vehicles involve multiple control modes, each corresponding to different vehicle operating states and user needs. The characteristics of these control modes can influence the vehicle's power-on and power-off processes. Therefore, how to safely and efficiently complete the power-on and power-off control processes based on different vehicle control modes, ensuring the stability and reliability of the entire vehicle, has become a major technical challenge in the development of hybrid vehicles.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a vehicle power-on / off control method, a vehicle, and a computer-readable storage medium to at least solve the technical problem that the vehicle power-on / off control method is not compatible with multiple control modes.

[0005] According to one aspect of the present invention, a vehicle power-on / off control method is provided, comprising: acquiring the current state of the vehicle, wherein the current state includes at least one of the following: key state, charging port state, discharging port state, gear position state, whether a charging request has been received, and whether a battery heating request has been received; determining a target control mode of the vehicle based on the current state, wherein the target control mode includes one of the following: driving mode, AC charging mode, DC charging mode, AC charging heating mode, DC charging heating mode, and discharging mode; and controlling the vehicle to power on or off based on a control strategy of the target control mode.

[0006] Optionally, based on the current state, determining the target control mode of the vehicle includes: in response to the key being in the start state, the charging port being disconnected, and the gear being in a non-forward gear, determining the target control mode as a driving mode; in response to the key being off or not driving, the charging port being connected to the AC charging gun, the gear being in a non-forward gear, and a charging request being received, determining the target control mode as an AC charging mode; in response to the key being off or not driving, the charging port being connected to the DC charging gun, the gear being in a non-forward gear, and a charging request being received, determining the target control mode as a DC charging mode; in response to... When the key is off or not in driving mode, the charging port is connected to the AC charging gun, the gear is not in forward gear, and a battery heating request is received, the target control mode is determined to be AC ​​charging heating mode; when the key is off or not in driving mode, the charging port is connected to the DC charging gun, the gear is not in forward gear, and a battery heating request is received, the target control mode is determined to be DC charging heating mode; when the discharge port is connected to the discharge gun, the gear is not in forward gear, the remaining capacity of the vehicle's battery is greater than a first preset capacity, and the battery's discharge power is greater than a preset power, the target control mode is determined to be discharge mode.

[0007] Optionally, in response to the target control mode being the driving mode, the control strategy based on the target control mode includes controlling the vehicle to power on, including: in response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, controlling the battery management system to sequentially engage the main negative relay and the pre-charge relay; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, controlling the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, controlling the pre-charge relay to disconnect; enabling the vehicle's DC-DC converter and drive motor controller, and controlling the high-voltage power supply of the vehicle's power system; in response to the vehicle controller determining that the vehicle anti-theft authentication is successful, controlling the vehicle's drive motor to be in torque control mode; and controlling the instrument controller to display the start status indicator.

[0008] Optionally, based on the control strategy of the target control mode, the vehicle is powered down, including: controlling the DC-DC converter and drive motor controller to stop enabling via the vehicle controller; responding to the vehicle controller receiving a high-voltage power-down signal from the drive motor controller, controlling the air conditioning controller to turn off the air conditioning via the vehicle controller; responding to the vehicle controller receiving an air conditioning completion shutdown signal from the vehicle's air conditioning controller, controlling the battery management system to sequentially disconnect the main positive relay and the main negative relay via the vehicle controller; responding to the vehicle controller receiving a relay disconnection signal from the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller; and responding to the vehicle controller receiving a discharge completion signal from the drive motor controller, powering down the vehicle controller, drive motor controller, air conditioning controller, and battery management system.

[0009] Optionally, the method further includes: in response to the key state changing from the start state to the off or non-driving state, or the charging port state indicating that the vehicle is connected to the AC charging gun, determining the target control mode to exit the driving mode.

[0010] Optionally, in response to the target control mode being AC charging mode, the control strategy based on the target control mode for powering on the vehicle includes: in response to the vehicle controller receiving a main positive relay disconnect signal sent by the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, the vehicle controller controls the pre-charge relay to disconnect; the vehicle controller enables the vehicle's DC-DC converter; and the vehicle controller powers on the vehicle's power system at high voltage.

[0011] Optionally, based on the control strategy of the target control mode, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to sequentially disconnect the main positive relay and the main negative relay via the vehicle controller; and in response to the vehicle controller receiving the relay disconnect signal sent by the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller.

[0012] Optionally, the method further includes: in response to the charging port being in an unconnected state, or receiving a stop charging request, or receiving a charging completion signal, determining the target control mode to exit the AC charging mode.

[0013] Optionally, in response to the target control mode being DC charging mode, the control strategy based on the target control mode for powering on the vehicle includes: in response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, the vehicle controller controls the pre-charge relay to disconnect; the vehicle controller controls the battery management system to sequentially engage the DC charging positive relay; the vehicle controller enables the vehicle's DC-DC converter; and the vehicle controller powers on the vehicle's power system with high voltage.

[0014] Optionally, based on the control strategy of the target control mode, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to disable the off-board charger via the vehicle controller; controlling the battery management system to sequentially disconnect the DC charging positive relay, the main positive relay, the pre-charge relay, and the main negative relay via the vehicle controller; and in response to the vehicle controller receiving the relay disconnection signal sent by the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller.

[0015] Optionally, the method further includes: in response to the charging port being unconnected, or receiving a stop charging request, or receiving a charging completion signal, determining the target control mode to exit the DC charging mode.

[0016] Optionally, in response to the target control mode being AC charging and heating mode, the control strategy based on the target control mode for controlling the vehicle to power on includes: controlling the on-board charger to output a constant voltage to pre-charge the drive motor controller via the battery management system; in response to the vehicle controller determining that the motor bus voltage is greater than a first preset voltage, controlling the battery management system to engage the high-voltage relay of the heating device via the vehicle controller; in response to the vehicle controller determining that the motor bus voltage is greater than a second preset voltage, enabling the vehicle's DC-DC converter via the vehicle controller, wherein the second preset voltage is less than the first preset voltage; in response to the vehicle controller determining that the motor bus voltage is less than a third preset voltage, determining that the vehicle controller exits the power-on control, wherein the third preset voltage is less than the second preset voltage; and controlling the on-board charger to continue outputting a constant voltage via the battery management system.

[0017] Optionally, based on the target control mode control strategy, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to disconnect the high-voltage relay of the heating device via the vehicle controller; controlling the on-board charger to stop outputting a constant voltage via the battery management system; in response to the vehicle controller determining that AC charging heating is complete and no charging request has been received, sending a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller determining that AC charging heating is complete and a charging request has been received, prohibiting the sending of the fast discharge command to the drive motor controller via the vehicle controller.

[0018] Optionally, the method further includes: in response to the charging port being not connected or receiving a stop heating request, determining the target control mode to exit the AC charging heating mode.

[0019] Optionally, in response to the target control mode being DC charging and heating mode, the control strategy based on the target control mode for powering on the vehicle includes: in response to the vehicle controller determining that the DC charging gun output voltage reaches the current battery voltage, controlling the battery management system to sequentially engage the DC charging positive relay and the pre-charge relay via the vehicle controller; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, controlling the battery management system to close the main positive relay and open the pre-charge relay via the vehicle controller; controlling the on-board charger to output a constant voltage to pre-charge the battery via the battery management system; controlling the battery management system to engage the heating device high-voltage relay via the vehicle controller; and controlling the vehicle's DC-DC converter to enable via the vehicle controller.

[0020] Optionally, based on the target control mode control strategy, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to disconnect the high-voltage relay of the heating device via the vehicle controller; controlling the on-board charger to stop outputting a constant voltage via the battery management system; controlling the battery management system to sequentially disconnect the main positive relay and the DC charging positive relay via the vehicle controller; in response to the vehicle controller determining that DC charging heating is complete and no charging request has been received, sending a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller determining that DC charging heating is complete and a charging request has been received, prohibiting the sending of the fast discharge command to the drive motor controller via the vehicle controller.

[0021] Optionally, the method further includes: in response to the charging port being not connected, or receiving a stop charging request, or receiving a charging completion signal, determining the target control mode to exit the DC charging heating mode.

[0022] Optionally, in response to the target control mode being a discharge mode, the method further includes: in response to the charging port being unconnected or the remaining capacity of the battery being less than a second preset capacity, determining that the target control mode exits the discharge mode.

[0023] According to another aspect of the present invention, a vehicle power-on / off control device is also provided, comprising: an acquisition module, configured to acquire the current state of the vehicle, wherein the current state includes at least one of the following: key state, charging port state, discharging port state, gear position state, whether a charging request has been received, and whether a battery heating request has been received; a determination module, configured to determine a target control mode of the vehicle based on the current state, wherein the target control mode includes one of the following: driving mode, AC charging mode, DC charging mode, AC charging heating mode, DC charging heating mode, and discharging mode; and a control module, configured to control the vehicle to power on or off based on a control strategy of the target control mode.

[0024] According to another aspect of the present invention, an electronic device is also provided, comprising: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods of various embodiments of the present invention during runtime.

[0025] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0026] According to another aspect of the present invention, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0027] According to another aspect of the present invention, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0028] According to another aspect of the present invention, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of the present invention.

[0029] In this embodiment of the invention, the method involves acquiring the current state of the vehicle; determining the target control mode of the vehicle based on the current state; and controlling the vehicle to power on or off based on the control strategy of the target control mode. It is noteworthy that corresponding power-on / off control strategies are pre-set for different control modes, thereby determining the target control mode through the current state and completing the power-on or power-off of the vehicle adapted to the target control mode based on the control strategy of the target control mode. This improves the compatibility between the power-on / off control method and the vehicle control mode, enhances the stability of vehicle operation, and thus solves the technical problem that the vehicle power-on / off control method is not compatible with multiple control modes. Attached Figure Description

[0030] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0031] Figure 1 This is a flowchart of a vehicle power-on / off control method according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of an optional power system configuration according to an embodiment of the present invention;

[0033] Figure 3 A flowchart of an optional vehicle entering AC charging mode according to an embodiment of the present invention;

[0034] Figure 4 A flowchart of an optional vehicle exiting AC charging mode according to an embodiment of the present invention;

[0035] Figure 5 This is a schematic diagram of a vehicle power-on / off control device according to an embodiment of the present invention. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] Example 1

[0039] According to an embodiment of the present invention, an embodiment of a vehicle power-on / off control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0040] Figure 1 This is a flowchart of a vehicle power-on / off control method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0041] Step S102: Obtain the current status of the vehicle, wherein the current status includes at least one of the following: key status, charging port status, discharging port status, gear position status, whether a charging request has been received, and whether a battery heating request has been received.

[0042] The key status in the above steps is one of the following: Key-OFF (off state), Key-ACC (auxiliary state), Key-ON (running state), Key-START (starting state).

[0043] The charging port status in the above steps can indicate whether the AC charging port is connected or the DC charging port is connected.

[0044] The state of the discharge port in the above steps can indicate whether the discharge port is connected or locked.

[0045] The gear position in the above steps is one of the following: P (Parking), R (Reverse), N (Neutral), or D (Drive).

[0046] The charging request in the above steps is a request for DC charging or AC charging of the vehicle.

[0047] The heating request in the above steps is a request to heat the battery during the charging process. Heating the battery during charging is usually to prevent the battery performance from degrading in low-temperature environments.

[0048] In one alternative embodiment, Figure 2 This is a schematic diagram of an optional power system configuration according to an embodiment of the present invention. The power system configuration addressed in this embodiment is as follows: Figure 2 As shown, the controllers included in the powertrain configuration are: Engine Management System (EMS), Hybrid Control Unit (HCU), Motor Control Unit (MCU), Battery Management System (BMS), Transmission Control Unit (TCU), Direct Current Converter (DCDC), Instrument Cluster (IC), Body Control Unit (BCM), Charger Control Unit (CCU), Internet System Control (INSC), and Body Control Module (BCM). In addition, the components included in the powertrain configuration are: charging pile, generator, charger, power battery, clutch, drive motor, transmission, wheels, and mobile terminal (Mobile Phone Application, or Mobile Phone APP).

[0049] The various controllers communicate via a CAN (Controller Area Network). The HCU is the core controller of the vehicle, used to coordinate and control other subsystems, and interacts with the EMS, DC-DC converter, CCU, INSC, IC, BCM, TCU, MCU, and BMS. The EMS controls the engine and sends control information to it; the MCU controls the drive motor and sends control information to it; the BMS controls the power battery and can interact with it; the TCU controls the transmission and can send control information to it; the DC-DC converter is used for current conversion; the IC displays various system mode information; the CCU controls the onboard charger and the charger can provide feedback to the CCU; the INSC monitors intelligent network information and informs the user of the vehicle's target control mode via a mobile phone app; the BCM controls the AC charging port indicator light; and the TCU controls the transmission and can send control information to it. The clutch is located between the engine and the drive motor. The transmission is connected to the wheels via a drive shaft, transmitting power from the engine to the wheels, enabling the vehicle to move.

[0050] Oriented Figure 2 The powertrain configuration allows the vehicle to obtain its current status from various controllers via the CAN bus within the vehicle. Alternatively, the HCU can send query requests to other controllers, collect response data, and then obtain the vehicle's current status from the HCU.

[0051] Step S104: Based on the current state, determine the target control mode of the vehicle, wherein the target control mode includes one of the following: driving mode, AC charging mode, DC charging mode, AC charging heating mode, DC charging heating mode, and discharge mode.

[0052] The target control mode in the above steps is the control mode corresponding to the current state, which can be determined based on the current state.

[0053] The driving mode described above is the primary mode used during normal vehicle operation, powered by both the engine and electric motor. In this mode, the vehicle's control system distributes power between the electric motor and the engine based on driver input and actual driving conditions.

[0054] The AC charging mode described above refers to charging the vehicle using an AC power source, while the DC charging mode refers to charging the vehicle using a DC power source. AC charging is suitable for standard charging speeds but takes a relatively long time. DC charging, on the other hand, is faster than AC charging and is suitable for fast charging scenarios.

[0055] The AC charging heating mode mentioned above is a mode in which the vehicle is charged by AC while the battery is heated in a low-temperature environment. In this mode, the vehicle's heating system will work to maintain the battery temperature while charging.

[0056] The DC charging heating mode described above is a mode in which the vehicle is charged by DC while the battery is heated in a low-temperature environment. In this mode, the vehicle is charged by DC power and the heating system is activated at the same time to cope with the cold environment.

[0057] The discharge mode in the above steps is the mode in which the vehicle's battery supplies power to external devices. In this mode, the vehicle's battery acts as a power source, outputting electricity.

[0058] In one optional embodiment, the driver can use the interactive system to change the vehicle's current state. The control system can then select the most suitable mode based on the vehicle's current state, i.e., determine the target control mode based on the current state. When determining the target control mode, a pre-set correspondence between key status, charging port status, discharging port status, gear position, whether a charging request has been received, and whether a battery heating request has been received, and each target control mode can be stored. Upon acquiring the vehicle's current state, the system searches for the corresponding target control mode from the correspondence to determine the target control mode.

[0059] Step S106: Based on the control strategy of the target control mode, control the vehicle to power on or off.

[0060] The control strategy in the above steps is the strategy for controlling the vehicle to power on or off. The control strategy will also be different when the target control mode is different.

[0061] In one optional embodiment, the characteristics of different target control modes need to be considered in relation to the impact of these modes on vehicle power-on or power-off. For example, when powering on or off the vehicle in AC charging or DC charging modes, the handling of the charging station, charger, and CCU needs to be considered; in AC charging heating or DC charging heating modes, heating control of the BMS and CCU needs to be considered. Therefore, a control strategy based on the target control mode is needed to control the vehicle's power-on or power-off, ensuring that the power-on or power-off process better meets the requirements of different target control modes. This guarantees that the vehicle's electrical system can be safely started or stopped under different target control modes, avoiding electrical system damage or safety accidents caused by sudden current changes.

[0062] In this embodiment of the invention, the method involves acquiring the current state of the vehicle; determining the target control mode of the vehicle based on the current state; and controlling the vehicle to power on or off based on the control strategy of the target control mode. It is noteworthy that corresponding power-on / off control strategies are pre-set for different control modes, thereby determining the target control mode through the current state and completing the power-on or power-off of the vehicle adapted to the target control mode based on the control strategy of the target control mode. This improves the compatibility between the power-on / off control method and the vehicle control mode, enhances the stability of vehicle operation, and thus solves the technical problem that the vehicle power-on / off control method is not compatible with multiple control modes.

[0063] Optionally, based on the current state, determining the target control mode of the vehicle includes: in response to the key being in the start state, the charging port being disconnected, and the gear being in a non-forward gear, determining the target control mode as a driving mode; in response to the key being off or not driving, the charging port being connected to the AC charging gun, the gear being in a non-forward gear, and a charging request being received, determining the target control mode as an AC charging mode; in response to the key being off or not driving, the charging port being connected to the DC charging gun, the gear being in a non-forward gear, and a charging request being received, determining the target control mode as a DC charging mode; in response to... When the key is off or not in driving mode, the charging port is connected to the AC charging gun, the gear is not in forward gear, and a battery heating request is received, the target control mode is determined to be AC ​​charging heating mode; when the key is off or not in driving mode, the charging port is connected to the DC charging gun, the gear is not in forward gear, and a battery heating request is received, the target control mode is determined to be DC charging heating mode; when the discharge port is connected to the discharge gun, the gear is not in forward gear, the remaining capacity of the vehicle's battery is greater than a first preset capacity, and the battery's discharge power is greater than a preset power, the target control mode is determined to be discharge mode.

[0064] The non-forward gears mentioned above refer to gears other than D in the gear selection.

[0065] The charging request in the above steps is a power battery charging request sent by the BMS.

[0066] The battery heating request in the above steps is a power battery heating request issued by the BMS.

[0067] The DC charging gun and AC charging gun mentioned above are two different types of charging interfaces in the field of electric vehicle charging. The DC charging gun is used for DC charging, and the AC charging gun is used for AC charging.

[0068] In one optional embodiment, if the vehicle simultaneously meets the following conditions: the key is in Key-START state (i.e., in the started state); the vehicle charging gun is not connected (i.e., the charging port is not connected); the vehicle is in P or N gear (i.e., the gear is not forward); and the HCU and key anti-theft verification are successful, the vehicle has not been involved in a collision, there are no faults affecting the high-voltage electricity on the vehicle, all controllers have completed initialization and are fault-free, the vehicle speed is less than the threshold value, and the driver has depressed the brake pedal, then the target control mode is determined to be the driving mode. It should be noted that a preferred threshold value is 3 kilometers per hour, but it is not limited to this; other suitable values ​​can be selected as the threshold value based on the actual application.

[0069] If a vehicle simultaneously meets the following conditions: the key is in Key-OFF or Key-ACC mode (i.e., the key is off or not in driving mode); the vehicle is connected to the AC charging gun, and the charging gun is locked (i.e., the charging port is connected to the AC charging gun); the TCU sends a gear signal indicating P or N (i.e., a non-forward gear); the BMS sends a power battery charging request signal (i.e., a charging request is received); and the HCU detects no fault affecting AC charging, and the HCU detects that the temperatures reported by AC charging socket temperature sensors 1 and 2 do not exceed the temperature threshold, then the target control mode is determined to be AC ​​charging mode. It should be noted that a preferred temperature threshold value is 85 degrees Celsius, but it is not limited to this; other suitable values ​​can be selected as the temperature threshold based on the actual application.

[0070] If a vehicle simultaneously meets the following conditions: the vehicle key switch is in Key-OFF or Key-ACC mode (i.e., the key is off or not in driving mode); the DC charging port is fully connected (i.e., the charging port is connected to the DC charging gun); the TCU sends a gear position signal indicating P or N gear (i.e., a non-forward gear); a power battery charging request is received from the BMS; and the HCU detects no high-voltage faults affecting DC charging, and the HCU detects that the temperatures reported by the two temperature sensors in the DC charging socket do not exceed the temperature threshold, then the target control mode is determined to be DC charging mode. It should be noted that a preferred temperature threshold value is 85 degrees Celsius, but it is not limited to this; other suitable values ​​can be selected as the temperature threshold based on the actual application.

[0071] If a vehicle simultaneously meets the following conditions: the vehicle key is in Key-OFF or Key-ACC mode (i.e., the key is off or not in driving mode); the HCU detects a normal AC charging gun connection (i.e., the charging port is connected to the AC charging gun); the TCU sends a message indicating the gear is P or N (i.e., a non-forward gear); the BMS sends a power battery heating request (i.e., a battery heating request is received); the HCU receives a message from the BCM indicating the electronic lock is locked; the HCU detects no faults affecting AC charging heating; and the HCU detects that the temperatures reported by the two temperature sensors in the AC charging socket do not exceed the temperature threshold, then the target control mode is determined to be AC ​​charging heating mode. It should be noted that a preferred temperature threshold value is 85 degrees Celsius, but it is not limited to this; other suitable values ​​can be selected as the temperature threshold based on the actual application.

[0072] If a vehicle simultaneously meets the following conditions: the key is in Key-OFF or Key-ACC mode (i.e., the key is off or not in driving mode); the DC charging port is fully connected (i.e., the vehicle is connected to the DC charging gun); the TCU sends a gear signal indicating P or N gear (i.e., a non-forward gear); a BMS request for battery heating is received; and the HCU detects a high-voltage fault that does not affect DC charging heating, and the HCU detects that the temperatures reported by the two temperature sensors in the DC charging socket do not exceed the temperature threshold, then the target control mode is determined to be DC charging heating mode. It should be noted that a preferred temperature threshold value is 85 degrees Celsius, but it is not limited to this; other suitable values ​​can be selected as the temperature threshold based on the actual application.

[0073] If the vehicle simultaneously meets the following conditions: the HCU detects that the discharge gun is connected to the vehicle, meaning the discharge port status is vehicle-to-discharge-gun connection; the TCU sends a gear signal indicating P or N gear, meaning the gear is a non-forward gear; the BMS sends a signal indicating the battery's SOC (State of Charge) is greater than a threshold value (the battery's remaining capacity, and the threshold value is the first preset capacity); the BMS sends a signal indicating the battery's permissible discharge power is greater than a preset power, meaning the battery's discharge power is greater than a preset power; and the BCM detects the discharge gun is locked and the HCU detects a fault that does not affect the discharge function, then the target control mode is determined to be discharge mode. A preferred value for the first preset capacity is 36%, but it is not limited to this; other suitable values ​​can be selected as the first preset capacity based on the actual application. A preferred value for the preset power is 20 kW, but it is not limited to this; other suitable values ​​can be selected as the preset power based on the actual application.

[0074] Optionally, in response to the target control mode being the driving mode, the control strategy based on the target control mode includes controlling the vehicle to power on, including: in response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, controlling the battery management system to sequentially engage the main negative relay and the pre-charge relay; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, controlling the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, controlling the pre-charge relay to disconnect; enabling the vehicle's DC-DC converter and drive motor controller, and controlling the high-voltage power supply of the vehicle's power system; in response to the vehicle controller determining that the vehicle anti-theft authentication is successful, controlling the vehicle's drive motor to be in torque control mode; and controlling the instrument controller to display the start status indicator.

[0075] The vehicle controller, or HCU, mentioned in the above steps is an electronic control unit responsible for the overall vehicle control logic. It can coordinate and control various subsystems of the vehicle, including the electric motor, battery management system, engine, etc.

[0076] The battery management system (BMS) mentioned above is responsible for monitoring and managing the status of the battery pack in electric or hybrid vehicles, including battery voltage, current, and temperature, and executing necessary control strategies to ensure the battery operates safely and efficiently.

[0077] The main positive relay mentioned in the above steps is an electrical switching device used to control the flow of high current, typically used to connect or disconnect the battery from other parts of the vehicle.

[0078] The main negative relay in the above steps corresponds to the main positive relay and is used to control the current path output from the negative terminal of the battery.

[0079] The pre-charge relay mentioned above is used to pre-charge the circuit before the battery is powered on. It can pre-charge the battery or motor before the actual power is applied to protect the battery and motor from damage.

[0080] The motor bus voltage mentioned in the above steps is the voltage in the motor control circuit, which is usually measured and reported by the drive motor controller.

[0081] The drive motor controller, or MCU, mentioned in the above steps is responsible for controlling the motor's start, stop, speed, and torque. The MCU is used to ensure that the motor works normally according to the instructions of the vehicle controller.

[0082] The preset value in the above steps is a pre-set value used to compare with the difference between the actual measured motor bus voltage and battery voltage. It can be set according to the actual application situation, and the specific value of the preset value is not limited here.

[0083] The DC-DC converter mentioned in the above steps is a device that converts a DC power supply at one voltage level to a DC power supply at another voltage level. It is commonly used in vehicles to provide appropriate voltages for different electrical systems.

[0084] The above steps refer to the power system being powered on, which means that the vehicle's power system (including the electric motor, battery, etc.) is connected to the power supply and ready to enter the working state.

[0085] The vehicle anti-theft authentication in the above steps is a security mechanism used to verify the identity of the driver or operator and prevent the vehicle from being used by unauthorized persons.

[0086] The instrument controller, or IC, mentioned in the above steps is used to control various displays on the vehicle's instrument panel, such as speed, battery status, and driving mode.

[0087] The start status indicator in the above steps is an indicator on the vehicle's dashboard used to indicate the vehicle's current start status. It can be a prompt message such as "Ready to start" or an indicator light on the dashboard, but it is not limited to these.

[0088] In one optional embodiment, after receiving the "main positive relay status off" signal from the BMS, the HCU sends a CAN signal to the BMS, controlling the BMS to sequentially engage the main negative relay and the pre-charge relay. When the HCU detects that the difference between the motor bus voltage sent by the MCU and the battery voltage sent by the BMS is less than a preset value, the HCU determines that pre-charging is complete. A preferred preset value is 20 volts, but it is not limited to this; other suitable values ​​can be selected as preset values ​​according to the actual application.

[0089] After pre-charging is complete, the BMS engages the main positive relay. The HCU then receives the BMS's notification of the main positive relay's engagement and disengages the pre-charging relay. Next, the HCU enables the DC-DC converter and the MCU, and controls the powertrain to apply high-voltage power. Once high-voltage power is applied, the HCU performs anti-theft authentication on the vehicle. After successful authentication, it sends a signal to the MCU to put the motor into torque control mode.

[0090] Subsequently, the HCU sends a CAN signal to the IC to display the start status indicator. The status indicator can be an indicator light on the instrument panel. When the indicator light is lit, it means that the status indicator has been started. At this time, the vehicle power system is ready, the vehicle is in a drivable state, and the vehicle power-on is complete.

[0091] Optionally, based on the control strategy of the target control mode, the vehicle is powered down, including: controlling the DC-DC converter and drive motor controller to stop enabling via the vehicle controller; responding to the vehicle controller receiving a high-voltage power-down signal from the drive motor controller, controlling the air conditioning controller to turn off the air conditioning via the vehicle controller; responding to the vehicle controller receiving an air conditioning completion shutdown signal from the vehicle's air conditioning controller, controlling the battery management system to sequentially disconnect the main positive relay and the main negative relay via the vehicle controller; responding to the vehicle controller receiving a relay disconnection signal from the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller; and responding to the vehicle controller receiving a discharge completion signal from the drive motor controller, powering down the vehicle controller, drive motor controller, air conditioning controller, and battery management system.

[0092] The high-voltage power-down signal in the above steps is a signal sent from the MCU to the HCU to indicate that the motor system is ready for a power-down operation. The high-voltage power-down signal is typically issued before the vehicle is prepared to shut down the high-voltage power supply or for maintenance, to ensure the safe disconnection of the high-voltage power supply.

[0093] The air conditioning controller mentioned above is an electronic control unit responsible for managing the vehicle's air conditioning system. Based on the temperature and mode set by the driver, it controls the air conditioning compressor, fan speed, and other related components to regulate the temperature and air quality inside the vehicle.

[0094] The air conditioning shutdown signal mentioned above is a signal sent by the air conditioning controller to the vehicle controller, indicating that the air conditioning system has completed the shutdown process according to the instructions.

[0095] The relay disconnect signal in the above steps is a signal sent by the BMS to the HCU to notify the HCU that the main positive relay and the main negative relay have been safely disconnected.

[0096] The rapid discharge command in the above steps is a command sent from the HCU to the MCU, requesting the MCU to release the electrical energy stored inside the motor. The rapid discharge command is typically used before the vehicle is powered off to ensure the safe release of electrical energy in the motor coils, preventing arcing or damage to the motor.

[0097] The discharge completion signal in the above steps is a signal sent from the MCU to the HCU, indicating that the motor has completed the rapid discharge process. After receiving this signal, the HCU will further instruct other systems, such as the BMS and air conditioning controller, to perform corresponding power-down operations.

[0098] In one optional embodiment, the HCU controls the DC-DC converter and MCU to de-enable, causing the motor to exit drive mode. When the HCU receives a high-voltage power-down signal from the MCU, it sends an air conditioning control signal to the air conditioning controller to control the controller to turn off the air conditioner. The high-voltage power-down signal can be a TMHVshut signal (a type of high-voltage power-down signal), which indicates whether the motor is allowed to disconnect the high-voltage relay. A TMHVshut signal of 1 indicates permission, and a TMHVshut signal of 0 indicates disallowance. If the HCU does not receive a TMHVshut signal from the MCU, the HCU waits for a preset number of minutes, which can be 5 minutes, but is not limited to this. After the timeout, the HCU disconnects the high-voltage main positive relay and the main negative relay, instructing the MCU to discharge rapidly. The air conditioning control signal can be an ACOn signal (an air conditioning control signal), where an ACOn signal of 0 indicates the air conditioner is off, and an ACOn signal of 1 indicates the air conditioner is on.

[0099] After the air conditioner controller turns off the air conditioner, it sends an air conditioner shutdown completion signal to the HCU to indicate whether the air conditioner has been successfully turned off. The air conditioner shutdown completion signal can be an ACShutoff signal (an air conditioner shutdown completion signal), and when the ACShutoff signal is 0, it indicates that the air conditioner has been successfully turned off.

[0100] After receiving the air conditioner shutdown signal, the HCU checks the battery current. If the battery current is less than a preset value, it sends a relay disconnect signal to the BMS, sequentially disconnecting the high-voltage main positive relay and the main negative relay. Upon receiving the relay disconnection completion signal from the BMS, it sends a fast discharge command to the MCU, instructing the MCU to discharge. If the battery current is not less than the preset value, it waits a preset time before instructing the BMS to disconnect the high-voltage main positive relay and the main negative relay, and instructing the MCU to discharge. The preset current value can be 3 amps, but is not limited to this; other values ​​can be selected based on actual conditions. The preset time is 5 seconds, but is not limited to this; other values ​​can be selected based on actual conditions.

[0101] After the MCU completes its discharge, it sends a discharge completion signal back to the HCU. At this point, the HCU, MCU, air conditioning controller, and BMS are all powered down.

[0102] Optionally, the method further includes: in response to the key state changing from the start state to the off or non-driving state, or the charging port state indicating that the vehicle is connected to the AC charging gun, determining the target control mode to exit the driving mode.

[0103] In one optional embodiment, the target control mode exits the driving mode when the vehicle is in driving mode and the key status changes from Key-START to Key-OFF or Key-ACC. The target control mode also exits the driving mode when the vehicle is in driving mode and the charging port status indicates the vehicle is connected to the AC charging gun. Furthermore, a fault affecting high-voltage power supply will also cause the driving mode to exit.

[0104] Optionally, in response to the target control mode being AC charging mode, the control strategy based on the target control mode for powering on the vehicle includes: in response to the vehicle controller receiving a main positive relay disconnect signal sent by the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, the vehicle controller controls the pre-charge relay to disconnect; the vehicle controller enables the vehicle's DC-DC converter; and the vehicle controller powers on the vehicle's power system at high voltage.

[0105] The main positive relay disconnect signal in the above steps is a signal used to control the closing and opening of the main positive relay.

[0106] In one optional embodiment, after receiving the "main positive relay status off" signal from the BMS, the HCU sends a CAN signal to the BMS to control the BMS to engage the main negative relay and the pre-charge relay. Then, it detects the difference between the motor bus voltage and the battery voltage. When the HCU detects that the difference between the motor bus voltage sent by the MCU and the battery voltage sent by the BMS is less than a preset value, the HCU determines that pre-charging is complete; otherwise, the HCU determines that pre-charging is not yet complete. A preferred value for the preset value is 20 volts, but it is not limited to this.

[0107] After pre-charging is complete, the BMS engages the main positive relay. Upon successful engagement, the BMS sends the main positive relay engagement status to the HCU. Upon receiving the engagement status from the BMS, the HCU disconnects the pre-charging relay. Subsequently, the HCU enables the DC-DC converter, completing the high-voltage power-on of the power system.

[0108] Optionally, based on the control strategy of the target control mode, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to sequentially disconnect the main positive relay and the main negative relay via the vehicle controller; and in response to the vehicle controller receiving the relay disconnect signal sent by the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller.

[0109] In one optional embodiment, the HCU sends a charging enable signal to the BMS and disables the DC-DC converter. Then, it checks the battery current. If the HCU determines the battery current is less than a preset current value, it sends a signal to the BMS, instructing the BMS to sequentially disconnect the high-voltage main positive relay and the main negative relay. After receiving the relay disconnection command from the BMS, the HCU sends a fast discharge command to the MCU. If the HCU determines the battery current is not less than the preset current value, it waits for a preset time before instructing the BMS to sequentially disconnect the high-voltage main positive relay and the main negative relay. After receiving the relay disconnection command from the BMS, the HCU sends a fast discharge command to the MCU. A preferred value for the preset current value is 3 amps, but it is not limited to this. A preferred value for the preset time is 5 seconds, but it is not limited to this. After the MCU has finished discharging, the AC charging mode power-on is complete.

[0110] Optionally, the method further includes: in response to the charging port being in an unconnected state, or receiving a stop charging request, or receiving a charging completion signal, determining the target control mode to exit the AC charging mode.

[0111] The stop charging request in the above steps is a request sent by the BMS to inform the HCU that it can stop charging the vehicle battery.

[0112] The charging completion signal in the above steps is a signal sent by the BMS, which is usually sent when charging is complete.

[0113] In an optional embodiment, if any of the following conditions are met: the charging port is in an unconnected or abnormally connected state; a power battery charging request is received from the BMS, i.e., a charging stop request is received; a charging completion signal is received from the BMS; a fault causing AC charging to stop is sent, such as a 220-volt power outage; the HCU detects that two temperature sensors in the AC charging socket or the temperature sensors report a temperature exceeding a temperature threshold, a preferred value of which is 85 degrees Celsius, but not limited to this; the HCU sends a charging permission signal, but the charger continuously reports "charging status is non-operational" for a preset time, a preferred value of which is 5 minutes, but not limited to this; the HCU receives a signal from the BCM that the AC charging gun electronic lock is in an unlocked state; an error occurs during the vehicle's AC charging process, and the charger does not request to recharge; the HCU determines that the power battery current is greater than the current threshold by more than 0.5A amperes for more than 30 minutes, and the HCU disables the air conditioning high voltage; if the power battery continues to discharge for 5 minutes, the HCU controls the vehicle to exit the AC charging mode. It should be noted that the specific values ​​described above are for illustrative purposes only. In practical applications, other suitable values ​​can be selected, and they are not limited to those mentioned above.

[0114] Optionally, in response to the target control mode being DC charging mode, the control strategy based on the target control mode for powering on the vehicle includes: in response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, the vehicle controller controls the pre-charge relay to disconnect; the vehicle controller controls the battery management system to sequentially engage the DC charging positive relay; the vehicle controller enables the vehicle's DC-DC converter; and the vehicle controller powers on the vehicle's power system with high voltage.

[0115] In one optional embodiment, upon receiving the "main positive relay status off" signal from the BMS, the HCU sends a CAN signal to the BMS, controlling the BMS to engage the main negative relay and the pre-charge relay. When the HCU detects that the difference between the motor bus voltage sent by the MCU and the battery voltage sent by the BMS is less than a preset value (a preferred value of which could be 20 volts, but is not limited to this), the HCU determines that pre-charging is complete.

[0116] After pre-charging is complete, the BMS engages the main positive relay. The HCU then receives the engagement status of the main positive relay from the BMS and disconnects the pre-charging relay. The HCU sends a CAN signal to the BMS, controlling the BMS to engage the high-voltage DC charging positive relay. The HCU then enables the DC-DC converter, completing the high-voltage power-on of the power system.

[0117] Optionally, based on the control strategy of the target control mode, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to disable the off-board charger via the vehicle controller; controlling the battery management system to sequentially disconnect the DC charging positive relay, the main positive relay, the pre-charge relay, and the main negative relay via the vehicle controller; and in response to the vehicle controller receiving the relay disconnection signal sent by the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller.

[0118] The main and negative relays in the above steps are connected to the negative terminal of the high-voltage circuit in the electric vehicle, typically the negative terminal of the power battery. The function of the main and negative relays is to control the flow of current from the power battery to other high-voltage systems in the vehicle, such as the motor controller and DC-DC converter, during vehicle startup, operation, and charging.

[0119] The DC charging positive relay in the above steps is usually connected between the high-voltage DC input terminal of the electric vehicle and the on-board charger or power battery. Its main function is to introduce the high-voltage DC power provided by the DC charging pile into the vehicle's charging system when the vehicle is DC charging.

[0120] The HCU sends a charging enable signal to the BMS and disables the DC-DC converter. The BMS disables the off-board charger and then checks the battery current. If the HCU determines that the battery current is less than a preset current value, it sends a signal to the BMS, instructing the BMS to sequentially disconnect the DC charging positive relay, main positive relay, pre-charge relay, and main negative relay. After receiving the relay disconnection command from the BMS, the HCU sends a fast discharge command to the MCU. If the HCU determines that the battery current is not less than the preset current value, it waits for a preset time before sending a signal to the BMS, instructing the BMS to sequentially disconnect the DC charging positive relay, main positive relay, pre-charge relay, and main negative relay. After receiving the relay disconnection command from the BMS, the HCU sends a fast discharge command to the MCU. A preferred preset current value is 3 amps, but it is not limited to this. A preferred preset time is 5 seconds, but it is not limited to this. After the MCU completes the discharge, the DC charging mode power-on is complete.

[0121] Optionally, the method further includes: in response to the charging port being unconnected, or receiving a stop charging request, or receiving a charging completion signal, determining the target control mode to exit the DC charging mode.

[0122] In one optional embodiment, if the vehicle meets any of the following conditions: the DC charging port is not connected or the connection is abnormal; a DC charging pile active stop signal is received from the BMS, i.e., a stop charging request is received; a charging completion signal is received from the BMS; a no-power battery charging request is received from the BMS; a fault exists that causes DC charging to stop; the HCU detects that the temperature reported by the temperature sensor on the DC charging dock exceeds the temperature threshold, which can be 85 degrees Celsius or 80 degrees Celsius, but is not limited to this; a charging fault has occurred in the DC charging system, then the HCU controls the vehicle to exit the DC charging mode.

[0123] Optionally, in response to the target control mode being AC charging and heating mode, the control strategy based on the target control mode for controlling the vehicle to power on includes: controlling the on-board charger to output a constant voltage to pre-charge the drive motor controller via the battery management system; in response to the vehicle controller determining that the motor bus voltage is greater than a first preset voltage, controlling the battery management system to engage the high-voltage relay of the heating device via the vehicle controller; in response to the vehicle controller determining that the motor bus voltage is greater than a second preset voltage, enabling the vehicle's DC-DC converter via the vehicle controller, wherein the second preset voltage is less than the first preset voltage; in response to the vehicle controller determining that the motor bus voltage is less than a third preset voltage, determining that the vehicle controller exits the power-on control, wherein the third preset voltage is less than the second preset voltage; and controlling the on-board charger to continue outputting a constant voltage via the battery management system.

[0124] The first preset voltage, the second preset voltage, and the third preset voltage in the above steps are all extracted and set voltages. They can be preset according to the actual application. Here, we do not limit the specific values ​​of the first preset voltage, the second preset voltage, and the third preset voltage.

[0125] The high-voltage relay mentioned in the above steps is used to control the power connection of the heating device. In a battery heating system, when the battery needs to be heated, the high-voltage relay closes, allowing current to flow to the heating device; when heating is complete or no longer needed, the relay opens, cutting off the current.

[0126] The constant output voltage of the on-board charger mentioned above refers to the on-board charger's ability to maintain a stable output voltage during the charging process to ensure battery charging efficiency and safety. A constant voltage output is crucial for battery health and lifespan, as unstable voltage can lead to overcharging or inefficient charging.

[0127] In one optional embodiment, after the HCU determines that the AC charging power battery heating mode conditions are met, it sends an "AC charging heating allow signal" to the BMS. The BMS then controls the on-board charger to output a constant voltage to the MCU for pre-charging. When the HCU detects that the motor bus voltage is greater than 310V (i.e., the first preset voltage), it determines that the MCU pre-charging is complete. The HCU then sends a relay controller signal to the BMS. The BMS then controls the high-voltage relay of the PTC heating device to close. After waiting for one minute, if the HCU determines that the motor bus voltage is still greater than 260V (i.e., the second preset voltage), it sends a CAN signal to the DC-DC converter to trigger its enable. After the DC-DC converter is enabled, if the HCU determines that the motor bus voltage is less than 255V (i.e., the third preset voltage), the HCU exits the power-on control, and the BMS continues to control the on-board charger to output a constant voltage to provide energy for the power battery heating until the AC charging heating mode power-on is complete. It should be noted that the specific values ​​described above are examples; other suitable values ​​can be selected in actual applications, and are not limited to the values ​​described above.

[0128] Optionally, based on the target control mode control strategy, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to disconnect the high-voltage relay of the heating device via the vehicle controller; controlling the on-board charger to stop outputting a constant voltage via the battery management system; in response to the vehicle controller determining that AC charging heating is complete and no charging request has been received, sending a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller determining that AC charging heating is complete and a charging request has been received, prohibiting the sending of the fast discharge command to the drive motor controller via the vehicle controller.

[0129] The rapid discharge command in the above steps is a command used in the battery management system of electric or hybrid vehicles to control the release of electrical energy.

[0130] In one optional embodiment, the HCU sends a CAN signal to the DC-DC converter to disable it. Subsequently, the HCU sends a command to the BMS to disconnect the PTC (Positive Temperature Coefficient) relay, which is the high-voltage relay of the heating device. Then, the HCU sends an AC charging heating enable signal to the BMS, and the BMS controls the on-board charger to stop outputting power, i.e., stop outputting a constant voltage. If the HCU determines that AC charging heating is complete and there is no charging request, it sends a fast discharge command to the MCU; if the HCU determines that AC charging heating is complete and there is a charging request, it does not send a fast discharge command to the MCU.

[0131] Optionally, the method further includes: in response to the charging port being not connected or receiving a stop heating request, determining the target control mode to exit the AC charging heating mode.

[0132] In an optional embodiment, if the vehicle meets any of the following conditions: the AC charging port is not connected or is abnormally connected; a stop heating request is received from the BMS; the HCU receives a message from the BCM indicating that the electronic lock is unlocked; the HCU detects a fault affecting AC charging heating; an error occurs during AC charging heating and the charger does not request to recharge; the HCU detects that the AC charging socket temperature sensor reports a temperature exceeding 85 degrees Celsius; the BMS does not request power battery heating; or AC charging heating ends, then the HCU controls the vehicle to exit the AC charging heating mode. It should be noted that the specific values ​​described above are examples, and other suitable values ​​can be selected in actual applications, and are not limited to the values ​​described above.

[0133] Optionally, in response to the target control mode being DC charging and heating mode, the control strategy based on the target control mode for powering on the vehicle includes: in response to the vehicle controller determining that the DC charging gun output voltage reaches the current battery voltage, controlling the battery management system to sequentially engage the DC charging positive relay and the pre-charge relay via the vehicle controller; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, controlling the battery management system to close the main positive relay and open the pre-charge relay via the vehicle controller; controlling the on-board charger to output a constant voltage to pre-charge the battery via the battery management system; controlling the battery management system to engage the heating device high-voltage relay via the vehicle controller; and controlling the vehicle's DC-DC converter to enable via the vehicle controller.

[0134] The DC charging positive relay in the above steps is a key electrical component used in hybrid vehicles or electric vehicles to control the current flow during DC charging.

[0135] In one optional embodiment, after determining that the conditions for DC charging heating mode are met, the HCU sends a DC charging enable signal to the BMS. The HCU then checks whether the output voltage signal of the charging station, i.e., the output voltage of the DC charging gun, reaches the current power battery voltage, i.e., the current battery voltage. If it does, the HCU sequentially closes the DC charging positive relay and the pre-charge relay to perform pre-charging using the DC charging station. If it does not reach the required voltage, the HCU delays for 5 minutes before re-evaluating. If the voltage still does not reach the required voltage after 5 minutes, the HCU controls the DC charging heating mode to power on and exit.

[0136] After closing the pre-charge relay, the HCU determines whether the voltage difference between the motor bus voltage and the power battery voltage is less than 20V. If it is less, the HCU determines that the pre-charge is complete and continues to execute the power-on step. If it is not less, it will be determined again after a 5-minute delay. If it is still not less after 5 minutes, the HCU will control the DC charging heating mode to exit the power-on process.

[0137] After pre-charging is complete, the HCU sends a CAN signal to the BMS. The BMS then sequentially closes the main positive relay and opens the pre-charge relay. The BMS controls the off-board charger to output constant voltage to provide energy for heating the power battery. The HCU sends a signal to the BMS to close the PTC heating device high-voltage relay, and the BMS controls the PTC relay to close. The HCU sends a signal to the DC-DC converter to enable it, completing the DC charging heating mode power-on.

[0138] It should be noted that the specific values ​​described above are for illustrative purposes only. In practical applications, other suitable values ​​can be selected, and they are not limited to those mentioned above.

[0139] Optionally, based on the target control mode control strategy, the vehicle is powered off, including: controlling the DC-DC converter to stop enabling via the vehicle controller; controlling the battery management system to disconnect the high-voltage relay of the heating device via the vehicle controller; controlling the on-board charger to stop outputting a constant voltage via the battery management system; controlling the battery management system to sequentially disconnect the main positive relay and the DC charging positive relay via the vehicle controller; in response to the vehicle controller determining that DC charging heating is complete and no charging request has been received, sending a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller determining that DC charging heating is complete and a charging request has been received, prohibiting the sending of the fast discharge command to the drive motor controller via the vehicle controller.

[0140] In one optional embodiment, the HCU sends a CAN signal to the DC-DC converter to disable it. Then, the HCU sends a command to the BMS to disconnect the high-voltage relay of the PTC heating device. The BMS then disconnects the PTC relay, which is the high-voltage relay of the heating device. The HCU determines the operating status of the DC-DC converter. When the HCU determines that the DC-DC converter is disabled, it sends a DC charging heating enable signal to the BMS. The BMS then controls the off-board charger, i.e., the DC charging station, to stop outputting power, i.e., to stop outputting a constant voltage.

[0141] The HCU determines the power battery current. If the power battery current is less than 3 amps, the power-down process continues. If the power battery current is not less than 3 amps, the process waits for 5 seconds before continuing. The HCU sequentially controls the disconnection of the power battery main positive relay and the DC charging positive relay. If the HCU determines that AC charging heating is complete and there is no charging request, it sends a fast discharge command to the MCU. If the HCU determines that AC charging heating is complete and there is a charging request, it does not send a fast discharge command to the MCU.

[0142] It should be noted that the specific values ​​described above are for illustrative purposes only. In practical applications, other suitable values ​​can be selected, and they are not limited to those mentioned above.

[0143] Optionally, the method further includes: in response to the charging port being not connected, or receiving a stop charging request, or receiving a charging completion signal, determining the target control mode to exit the DC charging heating mode.

[0144] In an optional embodiment, if the vehicle meets any of the following conditions: the DC charging port is not connected or the connection is abnormal; a stop charging request is received from the BMS; a charging completion signal is received from the BMS; the HCU detects a high-voltage fault that would cause the DC charging heater to shut down; the BMS does not request battery heating; the HCU detects that the DC charging socket temperature sensor reports a temperature exceeding 85 degrees Celsius; or a DC charging heater power-on error occurs in the vehicle or DC charging station system, then the HCU controls the vehicle to exit the DC charging heating mode. It should be noted that the specific values ​​described above are examples, and other suitable values ​​can be selected in actual applications, and are not limited to the values ​​described above.

[0145] Optionally, in response to the target control mode being a discharge mode, the method further includes: in response to the charging port being unconnected or the remaining capacity of the battery being less than a second preset capacity, determining that the target control mode exits the discharge mode.

[0146] The second preset capacity in the above steps is a pre-set capacity that can be preset according to the actual application situation. Here, the specific value of the second preset capacity is not limited.

[0147] In one optional embodiment, if the vehicle meets any of the following conditions: the HCU does not detect that the discharge gun is connected to the vehicle, i.e., the charging port is not connected; the SOC of the power battery is less than a threshold value, i.e., the remaining capacity of the battery is less than a second preset capacity; the HCU detects a fault affecting the discharge function; the power battery has a discharge mode error; the allowable discharge power of the power battery is less than the discharge power threshold value; or the BCM detects that the discharge gun is not locked, then the HCU controls the vehicle to exit the discharge mode. The second preset capacity can be 35%, but is not limited to this. The discharge power threshold value can be 20 kilowatts, but is not limited to this.

[0148] The following description uses a preferred embodiment. Figure 3 A flowchart of an optional vehicle entering AC charging mode according to an embodiment of the present invention is shown below. Figure 3 As shown, after the HCU triggers the high-voltage power-on strategy control, it sends an enable signal to the DCDC. Upon receiving the enable signal, the DCDC sends an operating status signal to the HCU. Upon receiving the operating status signal, the HCU sends a charging enable signal to the BMS. Upon receiving the charging enable signal, the BMS sends a charger mode request signal to the CCU. Upon receiving the charger mode request signal, the CCU sends an operating status signal to the BMS. Upon receiving the operating status signal, the BMS sends a battery charging status signal to the instrument cluster, and then the charging status indicator light on the instrument cluster illuminates, indicating that the vehicle has entered AC charging mode.

[0149] Figure 4 A flowchart of an optional vehicle exiting AC charging mode according to an embodiment of the present invention, such as... Figure 4 As shown, when the vehicle is in AC charging mode, it is determined whether the vehicle meets the exit conditions for AC charging mode. If not, the exit process is executed based on monitoring whether the vehicle meets the exit conditions for AC charging mode. If it does, the process of exiting AC charging mode is executed. During the process of exiting AC charging mode, the HCU sends a disable signal to the DC-DC converter. After receiving the disable signal, the DC-DC converter sends a non-operating status signal to the HCU. After receiving the non-operating status signal, the HCU sends a charging disallowed signal to the BMS. After receiving the charging disallowed signal, the BMS sends a charger mode request signal to the CCU. After receiving the charger mode request signal, the CCU sends a charger status signal. Then, it is detected whether the power battery current is less than 3 amps. If not, after waiting for 5 seconds, the HCU instructs the MCU to perform active discharge, and then the HCU triggers the high-voltage power-down strategy control; if so, the HCU directly triggers the high-voltage power-down strategy control. After the HCU triggers the high-voltage power-down strategy control, the AC charging mode exit is completed, the charging status indicator light on the instrument panel turns off, and the vehicle charging ends.

[0150] According to an embodiment of the present invention, a vehicle power-on / off control device is provided. It should be noted that the device can be used to execute the above-described vehicle power-on / off control method. Figure 5 This is a schematic diagram of a vehicle power-on / off control device according to an embodiment of the present invention, as shown below. Figure 5 As shown, the device includes:

[0151] The acquisition module 50 is used to acquire the current status of the vehicle, wherein the current status includes at least one of the following: key status, charging port status, discharging port status, gear status, whether a charging request has been received, and whether a battery heating request has been received.

[0152] The determination module 52 is used to determine the target control mode of the vehicle based on the current state. The target control mode includes one of the following: driving mode, AC charging mode, DC charging mode, AC charging heating mode, DC charging heating mode, and discharging mode.

[0153] The control module 54 is used to control the vehicle to power on or off based on a control strategy based on a target control mode.

[0154] The determining module includes: a first determining unit, used to determine the target control mode as driving mode in response to the key being in the start state, the charging port being disconnected, and the gear being in a non-forward gear; a second determining unit, used to determine the target control mode as AC charging mode in response to the key being in the off or non-driving state, the charging port being connected to the AC charging gun, the gear being in a non-forward gear, and a charging request being received; a third determining unit, used to determine the target control mode as DC charging mode in response to the key being in the off or non-driving state, the charging port being connected to the DC charging gun, the gear being in a non-forward gear, and a charging request being received; and a fourth determining unit, used to determine the target control mode as DC charging mode in response to... The first determining unit determines the target control mode as AC charging heating mode when the key is off or not in driving mode, the charging port is connected to the AC charging gun, the gear is not in forward gear, and a battery heating request is received. The second determining unit determines the target control mode as DC charging heating mode when the key is off or not in driving mode, the charging port is connected to the DC charging gun, the gear is not in forward gear, and a battery heating request is received. The third determining unit determines the target control mode as discharging mode when the discharge port is connected to the discharge gun, the gear is not in forward gear, the remaining capacity of the vehicle's battery is greater than a first preset capacity, and the battery's discharge power is greater than a preset power.

[0155] The control module includes: a power-on unit, used to respond to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, and controlling the battery management system to sequentially engage the main negative relay and the pre-charge relay via the vehicle controller; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, controlling the battery management system to engage the main positive relay via the vehicle controller, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, controlling the pre-charge relay to disconnect via the vehicle controller; enabling the vehicle's DC-DC converter and drive motor controller via the vehicle controller, and controlling the high-voltage power-on of the vehicle's power system; in response to the vehicle controller determining that the vehicle anti-theft authentication is successful, controlling the vehicle's drive motor to enter torque control mode; and controlling the instrument controller to display the start status indicator.

[0156] The control module also includes: a power-down unit, used to control the DC-DC converter and drive motor controller to stop enabling via the vehicle controller; in response to the vehicle controller receiving a high-voltage power-down signal from the drive motor controller, controlling the air conditioning controller to turn off the air conditioning via the vehicle controller; in response to the vehicle controller receiving an air conditioning completion shutdown signal from the vehicle's air conditioning controller, controlling the battery management system to sequentially disconnect the main positive relay and the main negative relay via the vehicle controller; in response to the vehicle controller receiving a relay disconnection signal from the battery management system, sending a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller receiving a discharge completion signal from the drive motor controller, powering down the vehicle controller, drive motor controller, air conditioning controller, and battery management system.

[0157] The control module also includes an exit unit, which is used to exit the driving mode in response to the key state changing from the start state to the off or non-driving state, or the charging port state indicating that the vehicle is connected to the AC charging gun.

[0158] The power-on unit is also used to respond to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, and to control the battery management system to sequentially engage the main negative relay and the pre-charge relay via the vehicle controller; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, to control the battery management system to engage the main positive relay via the vehicle controller, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, to control the pre-charge relay to disconnect via the vehicle controller; to control the vehicle's DC-DC converter to enable via the vehicle controller; and to control the high-voltage power-on of the vehicle's power system via the vehicle controller.

[0159] The power-down unit is also used to control the DC-DC converter to stop enabling via the vehicle controller; to control the battery management system to sequentially disconnect the main positive relay and the main negative relay via the vehicle controller; and to send a fast discharge command to the drive motor controller via the vehicle controller in response to the relay disconnection signal sent by the battery management system.

[0160] The exit unit is also used to exit the AC charging mode in response to the charging port being unconnected, receiving a stop charging request, or receiving a charging completion signal, by determining the target control mode.

[0161] The power-on unit is also used to respond to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, and to control the battery management system to sequentially engage the main negative relay and the pre-charge relay via the vehicle controller; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, to control the battery management system to engage the main positive relay via the vehicle controller, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; in response to the successful engagement of the main positive relay, to control the pre-charge relay to disconnect via the vehicle controller; to control the battery management system to sequentially engage the DC charging positive relay via the vehicle controller; to control the DC-DC converter of the vehicle via the vehicle controller; and to control the high-voltage power-on of the vehicle's power system via the vehicle controller.

[0162] The power-down unit is also used to control the DC-DC converter to stop enabling via the vehicle controller; to control the battery management system to disable the off-board charger via the vehicle controller; to control the battery management system to sequentially disconnect the DC charging positive relay, the main positive relay, the pre-charge relay, and the main negative relay via the vehicle controller; and in response to the vehicle controller receiving the relay disconnect signal sent by the battery management system, to send a fast discharge command to the drive motor controller via the vehicle controller.

[0163] The exit unit is also used to exit the DC charging mode in response to the charging port being unconnected, receiving a stop charging request, or receiving a charging completion signal, by determining the target control mode.

[0164] The power-on unit is also used to control the on-board charger to output a constant voltage to pre-charge the drive motor controller via the battery management system; in response to the vehicle controller determining that the motor bus voltage is greater than a first preset voltage, the vehicle controller controls the battery management system to engage the high-voltage relay of the heating device; in response to the vehicle controller determining that the motor bus voltage is greater than a second preset voltage, the vehicle controller enables the vehicle's DC-DC converter, wherein the second preset voltage is less than the first preset voltage; in response to the vehicle controller determining that the motor bus voltage is less than a third preset voltage, the vehicle controller exits the power-on control, wherein the third preset voltage is less than the second preset voltage; and controls the on-board charger to continue outputting a constant voltage via the battery management system.

[0165] The power-down unit is also used to control the DC-DC converter to stop enabling via the vehicle controller; to control the battery management system to disconnect the high-voltage relay of the heating device via the vehicle controller; to control the on-board charger to stop outputting a constant voltage via the battery management system; in response to the vehicle controller determining that AC charging heating is complete and no charging request has been received, to send a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller determining that AC charging heating is complete and a charging request has been received, to prohibit the sending of a fast discharge command to the drive motor controller via the vehicle controller.

[0166] The exit unit is also used to exit the AC charging heating mode in response to the charging port being unconnected or a stop heating request being received, by determining the target control mode.

[0167] The power-on unit is also used to respond to the vehicle controller determining that the DC charging gun output voltage has reached the current battery voltage, and to control the battery management system to sequentially engage the DC charging positive relay and the pre-charge relay via the vehicle controller; in response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, to control the battery management system to close the main positive relay and open the pre-charge relay via the vehicle controller; to control the on-board charger to output a constant voltage to pre-charge the battery via the battery management system; to control the battery management system to engage the heating device high-voltage relay via the vehicle controller; and to control the DC-DC converter of the vehicle to be enabled via the vehicle controller.

[0168] The power-down unit is also used to control the DC-DC converter to stop enabling via the vehicle controller; to control the battery management system to disconnect the high-voltage relay of the heating device via the vehicle controller; to control the on-board charger to stop outputting a constant voltage via the battery management system; to control the battery management system to sequentially disconnect the main positive relay and the DC charging positive relay via the vehicle controller; in response to the vehicle controller determining that DC charging heating is complete and no charging request has been received, to send a fast discharge command to the drive motor controller via the vehicle controller; and in response to the vehicle controller determining that DC charging heating is complete and a charging request has been received, to prohibit the sending of the fast discharge command to the drive motor controller via the vehicle controller.

[0169] The exit unit is also used to exit the DC charging heating mode in response to the charging port being unconnected, receiving a stop charging request, or receiving a charging completion signal, by determining the target control mode.

[0170] The exit unit is also used to exit the discharge mode in response to the charging port being disconnected or the remaining capacity of the battery being less than the second preset capacity, by determining the target control mode.

[0171] Embodiments of this application also provide an electronic device, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of the present invention during runtime.

[0172] Embodiments of this application also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of the present invention.

[0173] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of the present invention.

[0174] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program that, when executed by a processor, implements the methods in various embodiments of the present invention.

[0175] Embodiments of this application also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of the present invention.

[0176] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0177] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0178] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0179] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0180] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0181] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling the power on / off of a vehicle, characterized in that, include: Obtain the current status of the vehicle, wherein the current status includes at least one of the following: key status, charging port status, discharging port status, gear status, whether a charging request has been received, and whether a battery heating request has been received. Based on the current state, the target control mode of the vehicle is determined, wherein the target control mode includes one of the following: driving mode, AC charging mode, DC charging mode, AC charging heating mode, DC charging heating mode, and discharging mode; Based on the control strategy of the target control mode, the vehicle is controlled to power on or off. Determining the target control mode of the vehicle based on the current state includes: In response to the key being in the start state, the charging port being not connected, and the gear being in a non-forward gear, the target control mode is determined to be the driving mode. In response to the key being off or not in driving mode, the charging port being connected to the AC charging gun, the gear being in a non-forward gear, and the charging request being received, the target control mode is determined to be the AC charging mode. In response to the key being off or not in driving mode, the charging port being connected to the DC charging gun, the gear being in a non-forward gear, and the charging request being received, the target control mode is determined to be the DC charging mode. In response to the key being off or not in driving mode, the charging port being connected to the AC charging gun, the gear being in a non-forward gear, and the battery heating request being received, the target control mode is determined to be the AC charging heating mode. In response to the key being off or not in driving mode, the charging port being connected to the DC charging gun, the gear being in a non-forward gear, and the battery heating request being received, the target control mode is determined to be the DC charging heating mode. In response to the following conditions: the discharge port status is that the vehicle is connected to the discharge gun, the gear is a non-forward gear, the remaining capacity of the vehicle's battery is greater than a first preset capacity, and the discharge power of the battery is greater than a preset power, the target control mode is determined to be the discharge mode.

2. The vehicle power-on / off control method according to claim 1, characterized in that, In response to the target control mode being the driving mode, controlling the vehicle to power on based on the control strategy of the target control mode includes: In response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay. In response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; In response to the successful engagement of the main positive relay, the precharge relay is disconnected via the vehicle controller. The vehicle controller enables the DC-DC converter and drive motor controller of the vehicle, and controls the high-voltage power supply of the vehicle's power system. In response to the vehicle controller determining that the vehicle anti-theft authentication is successful, the vehicle's drive motor is controlled to enter torque control mode; The control instrument controller displays the start status indicator.

3. The vehicle power-on / off control method according to claim 2, characterized in that, Based on the control strategy of the target control mode, the vehicle is powered off, including: The vehicle controller controls the DC-DC converter and the drive motor controller to deactivate; In response to the vehicle controller receiving a high-voltage power signal from the drive motor controller, the vehicle controller controls the air conditioning controller to turn off the air conditioning. In response to the vehicle controller receiving an air conditioning shutdown signal from the vehicle's air conditioning controller, the vehicle controller controls the battery management system to sequentially disconnect the main positive relay and the main negative relay. In response to the vehicle controller receiving a relay disconnect signal from the battery management system, the vehicle controller sends a fast discharge command to the drive motor controller. In response to the vehicle controller receiving a discharge completion signal from the drive motor controller, the vehicle controller, the drive motor controller, the air conditioning controller, and the battery management system are powered down.

4. The vehicle power-on / off control method according to claim 2, characterized in that, The method further includes: In response to the key state changing from the start state to the off or non-driving state, or the charging port state indicating that the vehicle is connected to the AC charging gun, the target control mode is determined to exit the driving mode.

5. The vehicle power-on / off control method according to claim 1, characterized in that, In response to the target control mode being the AC charging mode, controlling the vehicle to power on based on the control strategy of the target control mode includes: In response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay. In response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; In response to the successful engagement of the main positive relay, the precharge relay is disconnected via the vehicle controller. The vehicle controller enables the DC-DC converter of the vehicle. The vehicle controller controls the high-voltage power supply of the vehicle's power system.

6. The vehicle power-on / off control method according to claim 5, characterized in that, Based on the control strategy of the target control mode, the vehicle is powered off, including: The vehicle controller controls the DC-DC converter to stop being enabled; The vehicle controller controls the battery management system to sequentially disconnect the main positive relay and the main negative relay; In response to the vehicle controller receiving a relay disconnect signal from the battery management system, the vehicle controller sends a fast discharge command to the drive motor controller.

7. The vehicle power-on / off control method according to claim 5, characterized in that, The method further includes: In response to the charging port being not connected, or receiving a stop charging request, or receiving a charging completion signal, the target control mode is determined to exit the AC charging mode.

8. The vehicle power-on / off control method according to claim 1, characterized in that, In response to the target control mode being the DC charging mode, the control strategy based on the target control mode, controlling the vehicle to power on includes: In response to the vehicle controller receiving a main positive relay disconnect signal from the battery management system, the vehicle controller controls the battery management system to sequentially engage the main negative relay and the pre-charge relay. In response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to engage the main positive relay, wherein the motor bus voltage is sent by the drive motor controller and the battery voltage is sent by the battery management system; In response to the successful engagement of the main positive relay, the precharge relay is disconnected via the vehicle controller. The vehicle controller controls the battery management system to sequentially engage the DC charging positive relays. The vehicle controller enables the DC-DC converter of the vehicle. The vehicle controller controls the high-voltage power supply of the vehicle's power system.

9. The vehicle power-on / off control method according to claim 8, characterized in that, Based on the control strategy of the target control mode, the vehicle is powered off, including: The vehicle controller controls the DC-DC converter to stop being enabled; The vehicle controller controls the battery management system to disable off-board chargers. The vehicle controller controls the battery management system to sequentially disconnect the DC charging positive relay, the main positive relay, the pre-charge relay, and the main negative relay. In response to the vehicle controller receiving a relay disconnect signal from the battery management system, the vehicle controller sends a fast discharge command to the drive motor controller.

10. The vehicle power-on / off control method according to claim 8, characterized in that, The method further includes: In response to the charging port being not connected, or receiving a stop charging request, or receiving a charging completion signal, the target control mode is determined to exit the DC charging mode.

11. The vehicle power-on / off control method according to claim 1, characterized in that, In response to the target control mode being the AC charging and heating mode, the control strategy based on the target control mode, controlling the vehicle to power on includes: The battery management system controls the on-board charger to output a constant voltage to precharge the drive motor controller; In response to the vehicle controller determining that the motor bus voltage is greater than a first preset voltage, the vehicle controller controls the battery management system to engage the high-voltage relay of the heating device. In response to the vehicle controller determining that the motor bus voltage is greater than a second preset voltage, the vehicle controller enables the DC-DC converter of the vehicle, wherein the second preset voltage is less than the first preset voltage; In response to the vehicle controller determining that the motor bus voltage is less than a third preset voltage, the vehicle controller determines to exit power-on control, wherein the third preset voltage is less than the second preset voltage; The battery management system controls the on-board charger to continue outputting a constant voltage.

12. The vehicle power-on / off control method according to claim 11, characterized in that, Based on the control strategy of the target control mode, the vehicle is powered off, including: The vehicle controller controls the DC-DC converter to stop being enabled; The vehicle controller controls the battery management system to disconnect the high-voltage relay of the heating device; The battery management system controls the on-board charger to stop outputting the constant voltage. In response to the vehicle controller determining that AC charging heating is complete and that no charging request has been received, the vehicle controller sends a fast discharge command to the drive motor controller. In response to the vehicle controller determining that AC charging heating is complete and receiving the charging request, the vehicle controller is prohibited from sending the fast discharge command to the drive motor controller.

13. The vehicle power-on / off control method according to claim 11, characterized in that, The method further includes: In response to the charging port being not connected, or receiving a stop heating request, the target control mode is determined to exit the AC charging heating mode.

14. The vehicle power-on / off control method according to claim 1, characterized in that, In response to the target control mode being the DC charging and heating mode, the control strategy based on the target control mode, controlling the vehicle to power on includes: In response to the vehicle controller determining that the DC charging gun output voltage has reached the current voltage of the battery, the vehicle controller controls the battery management system to sequentially engage the DC charging positive relay and the pre-charge relay. In response to the vehicle controller determining that the difference between the motor bus voltage and the battery voltage is less than a preset value, the vehicle controller controls the battery management system to close the main positive relay and open the pre-charge relay. The battery management system controls the on-board charger to output a constant voltage to precharge the battery. The vehicle controller controls the battery management system to engage the high-voltage relay of the heating device. The vehicle controller enables the DC-DC converter of the vehicle.

15. The vehicle power-on / off control method according to claim 14, characterized in that, Based on the control strategy of the target control mode, the vehicle is powered off, including: The vehicle controller controls the DC-DC converter to stop being enabled; The vehicle controller controls the battery management system to disconnect the high-voltage relay of the heating device; The battery management system controls the on-board charger to stop outputting the constant voltage. The vehicle controller controls the battery management system to sequentially disconnect the main positive relay and the DC charging positive relay; In response to the vehicle controller determining that DC charging heating is complete and not receiving the charging request, a fast discharge command is sent to the drive motor controller via the vehicle controller. In response to the vehicle controller determining that DC charging heating is complete and receiving the charging request, the vehicle controller is prohibited from sending the fast discharge command to the drive motor controller.

16. The vehicle power-on / off control method according to claim 14, characterized in that, The method further includes: In response to the charging port being not connected, or receiving a stop charging request, or receiving a charging completion signal, the target control mode is determined to exit the DC charging heating mode.

17. The vehicle power-on / off control method according to claim 1, characterized in that, In response to the target control mode being the discharge mode, the method further includes: In response to the charging port being unconnected or the remaining capacity of the battery being less than a second preset capacity, the target control mode is determined to exit the discharge mode.

18. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 17.

19. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the method according to any one of claims 1 to 17.

Images