Vehicle power-off control method, device, medium and equipment

Abstract

This disclosure relates to a vehicle power-off control method, apparatus, medium, and device. The method includes: if a user-triggered vehicle power-off instruction is received, the HCU determines whether the vehicle's state meets preset power-off conditions; if the vehicle's state meets the preset power-off conditions and the SOC of the power battery is greater than a predetermined charge threshold, the HCU starts timing; if the driver is detected to be absent from the vehicle before the timing reaches a predetermined duration, the HCU sends a relay disconnection request to the BMS; in response to receiving the relay disconnection request, the BMS controls the power battery's relay to disconnect. This approach balances the power battery's state of energy, ensuring that the delayed disconnection of the relay contacts does not excessively affect the power battery's energy reserves, thereby minimizing noise impact on the driver while maintaining the vehicle's existing range.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electric vehicle automatic control, and in particular to a vehicle power-off control method, device, medium and equipment. Background Art

[0002] At present, the phenomenon of energy shortage is becoming increasingly obvious, and the calls for the development of new energy in countries around the world are getting stronger and stronger. The government is vigorously supporting the development of the new energy vehicle industry through various policies.

[0003] New energy vehicles have added power-on and power-off functions, and use complex control strategies to control high-voltage components and drive components to enter / exit working modes. Among them, when controlling the exit of various high-voltage components of new energy vehicles from working modes, the most important thing is to turn on the relay of the high-voltage power battery to complete the high-voltage power-off. However, there will be a sound when the contacts of the high-voltage power battery relay are disconnected, causing the driver to hear the sound of the power battery relay being disconnected when the vehicle is powered off, causing confusion or dissatisfaction to the driver, so dealing with the sound of the high-voltage battery relay opening has become a problem that engineers have to consider. Summary of the invention

[0004] The purpose of the present disclosure is to provide an intelligent and energy-saving vehicle power-off control method, device, medium and equipment.

[0005] In order to achieve the above object, the present disclosure provides a vehicle power-off control method, the method comprising:

[0006] If a user-triggered vehicle power-off indication is received, the hybrid control unit (HCU) determines whether the vehicle status satisfies a preset power-off condition;

[0007] If it is determined that the state of the vehicle meets the preset power-off condition and the state of charge (SOC) of the power battery is greater than a predetermined charge threshold, the HCU starts timing;

[0008] If it is detected that the driver is not in the vehicle before the timing reaches a predetermined time, the HCU sends a relay disconnection request to a battery management system (BMS);

[0009] In response to receiving the relay disconnection request, the BMS controls the relay of the power battery to be disconnected.

[0010] Optionally, the method further comprises:

[0011] If it is determined that the state of the vehicle satisfies the preset power-off condition and the SOC of the power battery is less than or equal to the predetermined charge threshold, the HCU directly sends the relay disconnection request to the BMS.

[0012] Optionally, the method further comprises:

[0013] When the timing reaches the predetermined time period, the HCU sends the relay disconnection request to the BMS.

[0014] Optionally, after the BMS controls the relay of the power battery to be disconnected, the method further includes:

[0015] The BMS detects whether the relay of the power battery is adhered;

[0016] The BMS sends the detection result to the HCU;

[0017] If the detection result indicates no adhesion, the HCU controls the vehicle to enter a dormant state.

[0018] Optionally, the preset power-off conditions include: the vehicle speed is less than a predetermined vehicle speed threshold, the engine speed is less than a predetermined speed threshold, the belt-driven starter generator exits the working state, the DCDC exits the working state, the SOC of the low-voltage battery is greater than a predetermined power threshold, and the current in the high-voltage circuit is less than a predetermined current threshold.

[0019] The present disclosure also provides a vehicle power-off control device, the device comprising:

[0020] The HCU is configured to determine whether the vehicle status satisfies a preset power-off condition upon receiving a vehicle power-off indication triggered by a user; start timing if it is determined that the vehicle status satisfies the preset power-off condition and the SOC of the power battery is greater than a preset charge threshold; and send a relay disconnection request to the BMS if it is detected that the driver is not in the vehicle before the timing reaches a preset time;

[0021] The BMS is configured to control the relay of the power battery to disconnect in response to receiving the relay disconnect request.

[0022] Optionally, the HCU is further configured to:

[0023] If it is determined that the state of the vehicle satisfies the preset power-off condition and the SOC of the power battery is less than or equal to the predetermined charge threshold, the relay disconnection request is directly sent to the BMS.

[0024] Optionally, the HCU is further configured to:

[0025] When the timing reaches the predetermined time, the relay disconnection request is sent to the BMS.

[0026] The present disclosure also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which implements the steps of the method provided by the present disclosure when the program is executed by a processor.

[0027] The present disclosure also provides an electronic device, comprising:

[0028] a memory having a computer program stored thereon;

[0029] A processor is used to execute the computer program in the memory to implement the steps of the method provided by the present disclosure.

[0030] Through the above technical solution, if it is determined that the state of the vehicle meets the preset power-off conditions, and the SOC of the power battery is greater than the predetermined charge threshold, the HCU starts timing; if it is detected that the driver is not in the car before the timing reaches the predetermined time, the HCU sends a relay disconnection request to the BMS, so that the BMS controls the power battery relay to disconnect. In this way, on the one hand, when the driver is not in the car, the power battery relay is controlled to disconnect, which can avoid the noise generated by the disconnection of the relay contacts from affecting the driver; on the other hand, the energy state of the power battery is also weighed and considered, so that the delayed disconnection of the relay contacts will not affect the energy reserve of the power battery too much, thereby avoiding the noise impact on the driver as much as possible while ensuring the existing endurance of the vehicle.

[0031] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0033] Figure 1 is a flow chart of a vehicle power-off control method provided by an exemplary embodiment;

[0034] Figure 2 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment;

[0035] Figure 3 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment;

[0036] Figure 4 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment;

[0037] Figure 5is a flow chart of a vehicle power-off control method provided by another exemplary embodiment;

[0038] Figure 6 is a block diagram of a vehicle power-off control device provided by an exemplary embodiment;

[0039] Figure 7 It is a block diagram of an electronic device shown in an exemplary embodiment. DETAILED DESCRIPTION

[0040] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0041] The power-on and power-off functions are added to new energy vehicles, and the high-voltage components and drive components are controlled to enter / exit the working mode through complex control strategies. Among them, when controlling the exit of each high-voltage component from the working mode, the most important thing is to make the power battery open the relay to complete the high-voltage power-off. Due to the hardware characteristics of the power battery, a noticeable sound will be generated when the power battery relay contacts are opened, resulting in the driver being able to hear noticeable abnormal noises during the process of parking and powering off the vehicle, which is a kind of noise for the driver. The present invention avoids the noise impact of the relay contact disconnection on the driver as much as possible while ensuring the existing endurance of the vehicle.

[0042] Figure 1 FIG. 1 is a flow chart of a vehicle power-off control method provided by an exemplary embodiment. Figure 1 As shown, the method may include the following steps.

[0043] Step S11: If a vehicle power-off instruction triggered by a user is received, the HCU determines whether the vehicle status satisfies a preset power-off condition.

[0044] Step S12: If it is determined that the state of the vehicle meets the preset power-off condition and the SOC of the power battery is greater than a predetermined charge threshold, the HCU starts timing.

[0045] Step S13: If it is detected that the driver is not in the vehicle before the timing reaches a predetermined time, the HCU sends a relay disconnection request to the BMS.

[0046] Step S14: In response to receiving the relay disconnection request, the BMS controls the relay of the power battery to disconnect.

[0047] When the vehicle needs to be powered off, the user can trigger a specific button to send a vehicle power-off instruction to the HCU. In the related art, after receiving the vehicle power-off instruction, the HCU controls the vehicle to complete the power-off. For example, the user presses the Passive Entry Passive Start (PEPS) system button, the power supply system disconnects the IG1 and IG2 relays, and switches the power mode to the OFF mode, which can cut off the power supply of each control component and complete the power-off of the vehicle.

[0048] In the present disclosure, after receiving the vehicle power-off indication, the HCU can first determine whether the state of the vehicle meets the preset power-off conditions. If the above preset power-off conditions are met, it can be considered that the relay of the power battery can be cut off to safely power off. Among them, the preset power-off conditions may include: the vehicle speed is less than a predetermined vehicle speed threshold, the engine speed is less than a predetermined speed threshold (for example, less than 2km / h, the vehicle can be considered to be stationary), the belt-driven starter generator exits the working state, the DCDC exits the working state, the SOC of the low-voltage battery is greater than the predetermined power threshold, and the current in the high-voltage circuit is less than the predetermined current threshold. The present disclosure does not limit the order of judging the above conditions.

[0049] If the SOC of the power battery is greater than a predetermined charge threshold, it can be considered that the power battery currently has a large amount of electricity, so that the power battery relay can be allowed to be disconnected delayed to avoid noise impact on the driver.

[0050] Whether the driver has left the seat and is not in the vehicle can be determined by the signal fed back by the gravity-sensing seat configured in the vehicle. For example, if the signal fed back by the gravity-sensing seat in the vehicle indicates that the weight on the seat is greater than a predetermined weight threshold, it can be considered that the driver is still in the vehicle; conversely, if the signal fed back by the gravity-sensing seat indicates that the weight on the seat is less than or equal to the predetermined weight threshold, it can be considered that the driver is not in the vehicle.

[0051] Alternatively, the HCU can also comprehensively judge whether the driver is out of the vehicle based on the accelerator pedal, brake pedal, seat belt status and door status. For example, if the accelerator pedal or brake pedal is pressed, the seat belt is not unfastened, and the door is not opened after the vehicle speed decreases to zero, any one of the above conditions can be used to judge that the driver is still in the vehicle.

[0052] After the user triggers the vehicle power-off indication, if the driver leaves the vehicle before the timing reaches the preset time, the HCU detects that the driver is not in the vehicle and sends a relay disconnection request to the BMS so that the BMS controls the relay of the power battery to disconnect. The preset time can be obtained based on experiments or experience.

[0053] Through the above technical solution, if it is determined that the state of the vehicle meets the preset power-off conditions, and the SOC of the power battery is greater than the predetermined charge threshold, the HCU starts timing; if it is detected that the driver is not in the car before the timing reaches the predetermined time, the HCU sends a relay disconnection request to the BMS, so that the BMS controls the power battery relay to disconnect. In this way, on the one hand, when the driver is not in the car, the power battery relay is controlled to disconnect, which can avoid the noise generated by the disconnection of the relay contacts from affecting the driver; on the other hand, the energy state of the power battery is also weighed and considered, so that the delayed disconnection of the relay contacts will not affect the energy reserve of the power battery too much, thereby avoiding the noise impact on the driver as much as possible while ensuring the existing endurance of the vehicle.

[0054] Figure 2 FIG. 1 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment. Figure 2 As shown, in Figure 1 On the basis of, the method may further include step S120.

[0055] Step S120: If it is determined that the state of the vehicle meets the preset power-off condition and the SOC of the power battery is less than or equal to the predetermined charge threshold, the HCU directly sends a relay disconnection request to the BMS.

[0056] If the SOC of the power battery is less than or equal to the predetermined charge threshold, it can be considered that the power battery currently has little power. In order to ensure subsequent power consumption, the power battery relay is not delayed for disconnection, and the HCU does not time the time and directly disconnects the relay to power off the vehicle.

[0057] In this embodiment, priority is given to ensuring the vehicle's endurance power consumption to avoid affecting the normal driving of the vehicle due to delayed disconnection of the relay.

[0058] Figure 3 FIG. 1 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment. Figure 3 As shown, in Figure 1 On the basis of, the method may further include step S130.

[0059] Step S130: When the timing reaches a predetermined time, the HCU sends a relay disconnection request to the BMS.

[0060] That is, the delay in disconnecting the relay contacts to avoid the noise impact on the driver is limited to a predetermined time. If the predetermined time is exceeded, the noise impact is no longer considered, and the relay is directly controlled to be disconnected. This is done in consideration of the fact that the vehicle will consume electricity if it is not powered off, and a compromise is made between the power consumption and the noise impact by using the predetermined time. In this embodiment, both power consumption and noise impact are taken into account, and the noise impact on the driver is avoided as much as possible while ensuring the vehicle's existing endurance.

[0061] Figure 4 FIG. 1 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment. Figure 4 As shown, in Figure 1 On the basis of, after step S14 in which the BMS controls the relay of the power battery to be disconnected, the method may further include the following steps.

[0062] Step S15, the BMS detects whether the relay of the power battery is adhered.

[0063] Step S16: BMS sends the detection result to HCU.

[0064] Step S17: If the detection result indicates that there is no adhesion, the HCU controls the vehicle to enter a dormant state.

[0065] When the relay controlling the power battery is disconnected, the relay may stick. For safety reasons, the vehicle may be controlled to enter a dormant state after confirming that the relay is not sticky. The method in the related art may be applied to determine whether the relay is sticky. In this embodiment, the vehicle is controlled to enter a dormant state while ensuring that the relay is not sticky, thereby enhancing the safety of the vehicle.

[0066] Figure 5 FIG. 1 is a flow chart of a vehicle power-off control method provided by another exemplary embodiment. Figure 5 As shown, the vehicle power-off control method may include the following steps.

[0067] (1) When the driver presses the one-button start switch, PEPS receives the vehicle speed sent by the Electronic Stability Program (ESP) and makes a judgment;

[0068] If the vehicle speed is less than 5km / h, the KL15 OFF signal is sent to the HCU, EMS and various high-voltage components. After receiving the KL15 OFF signal sent by PEPS, the HCU starts to determine whether the vehicle status meets the preset power-off conditions and requests the instrument to turn off the Ready light;

[0069] If the vehicle speed < 5 km / h condition is not met, PEPS keeps IG1 / IG2 engaged and sends KL15 ON signal to allow the vehicle to continue running normally.

[0070] (2) The HCU receives the vehicle speed sent by the ESP and performs the next vehicle status check when the detected vehicle speed is less than 2 km / h, the engine state is in the exit state (shutdown), and the engine speed is less than a predetermined speed;

[0071] If the engine is not stopped, the speed is not reduced to less than the preset speed, or the vehicle speed is ≥2km / h, the vehicle will execute the delayed power-off process until the engine is stopped, the speed is less than the preset speed and the vehicle speed is <2km / h, and then the next operation will be executed;

[0072] (3) HCU detects the status of the belt-driven starter generator (BSG), DCDC, 12V low-voltage battery, battery pack temperature, etc. If the BSG is out of operation, the SOC of the low-voltage battery is greater than 80%, and the DCDC is out of operation, the HCU detects the current in the high-voltage circuit (sent by the BMS). If the current in the high-voltage circuit is greater than the current threshold, the HCU requests the motor to enter the active short-circuit mode (to avoid damage to the power battery, bus capacitor and other high-voltage components due to excessive back electromotive force); if the current in the high-voltage circuit is less than the current threshold, the HCU determines that the vehicle status meets the preset power-off conditions.

[0073] (4) The HCU starts to implement a delayed opening strategy for the power battery relay, taking into account whether the driver is in the vehicle, the state of the high-voltage power battery, and the energy consumption of the continuous high-voltage state, and determines the timing of sending a disconnect relay request to the BMS.

[0074] Specifically, if the SOC of the high-voltage power battery is less than the charge threshold, the instrument panel displays "Power battery is low, please charge in time", and the HCU sends a disconnect relay request to the BMS;

[0075] If the SOC of the high-voltage power battery is greater than the charge threshold, the HCU starts timing;

[0076] If it is detected that the driver is not in the vehicle before the timing reaches a predetermined time (calibrated according to the comprehensive energy consumption of the delayed closing relay, for example, 30 seconds), the HCU sends a disconnect relay request to the BMS;

[0077] If the timing reaches the preset time, the HCU sends a disconnect relay request to the BMS.

[0078] (5) After receiving the request from the HCU to disconnect the relay, the BMS controls the disconnection of the relay and performs a sticking test. The BMS reports the battery status and sticking test results to the HCU. If there is no sticking, the HCU stops sending messages and enters a dormant state. At this time, the vehicle is powered off.

[0079] Figure 6 FIG. 1 is a block diagram of a vehicle power-off control device provided by an exemplary embodiment. Figure 6 As shown, the vehicle power-off control device 600 may include an HCU 601 and a BMS 602 .

[0080] HCU601 is used to determine whether the vehicle status meets the preset power-off conditions if it receives a vehicle power-off indication triggered by the user; if it is determined that the vehicle status meets the preset power-off conditions and the SOC of the power battery is greater than the preset charge threshold, then start timing; if it is detected that the driver is not in the vehicle before the timing reaches the preset time, send a relay disconnect request to BMS 602.

[0081] The BMS 602 is configured to control the relay of the power battery to be disconnected in response to receiving the relay disconnection request.

[0082] Optionally, the HCU 601 is further configured to directly send a relay disconnection request to the BMS 602 if it is determined that the state of the vehicle meets a preset power-off condition and the SOC of the power battery is less than or equal to a predetermined charge threshold.

[0083] Optionally, the HCU 601 is further configured to send a relay disconnection request to the BMS 602 when the timing reaches a predetermined time.

[0084] Optionally, the BMS 602 is further configured to detect whether the relay of the power battery is adhered and send the detection result to the HCU 601 ; the HCU 601 is further configured to control the vehicle to enter a dormant state if the detection result indicates that there is no adhesion.

[0085] Optionally, the preset power-off conditions include: the vehicle speed is less than a predetermined vehicle speed threshold, the engine speed is less than a predetermined speed threshold, the belt-driven starter generator exits the working state, the DCDC exits the working state, the SOC of the low-voltage battery is greater than a predetermined power threshold, and the current in the high-voltage circuit is less than a predetermined current threshold.

[0086] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0087] Through the above technical solution, on the one hand, when the driver is not in the car, the relay of the power battery is controlled to be disconnected, which can avoid the noise generated by the disconnection of the relay contacts from affecting the driver; on the other hand, the energy state of the power battery is also taken into consideration, so that the delayed disconnection of the relay contacts will not too much affect the energy reserve of the power battery, thereby avoiding the noise impact on the driver as much as possible while ensuring the existing cruising range of the vehicle.

[0088] Figure 7 FIG. 7 is a block diagram of an electronic device 700 shown in an exemplary embodiment. Figure 7 As shown, the electronic device 700 may include: a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0089] The processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned vehicle power-off control method. The memory 702 is used to store various types of data to support the operation of the electronic device 700, and these data may include, for example, instructions for any application or method used to operate on the electronic device 700, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 705 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0090] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned vehicle power-off control method.

[0091] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned vehicle power-off control method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 702 including program instructions, and the above-mentioned program instructions can be executed by the processor 701 of the electronic device 700 to complete the above-mentioned vehicle power-off control method.

[0092] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program executable by a programmable device. The computer program has a code portion for executing the above-mentioned vehicle power-off control method when executed by the programmable device.

[0093] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0095] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle power-off control method, characterized in that: The method comprises: If a vehicle power-off indication is received from the user, the HCU determines whether the vehicle status satisfies the preset power-off condition; If it is determined that the state of the vehicle meets the preset power-off condition and the SOC of the power battery is greater than a predetermined charge threshold, the HCU starts timing; If it is detected that the driver is not in the vehicle before the timing reaches a predetermined time, the HCU sends a relay disconnection request to the BMS; When the timing reaches the predetermined time, the HCU sends the relay disconnection request to the BMS; In response to receiving the relay disconnection request, the BMS controls the relay of the power battery to be disconnected.

2. The method according to claim 1, characterized in that The method further comprises: If it is determined that the state of the vehicle satisfies the preset power-off condition and the SOC of the power battery is less than or equal to the predetermined charge threshold, the HCU directly sends the relay disconnection request to the BMS.

3. The method according to claim 1, characterized in that After the BMS controls the relay of the power battery to be disconnected, the method further includes: The BMS detects whether the relay of the power battery is adhered; The BMS sends the detection result to the HCU; If the detection result indicates no adhesion, the HCU controls the vehicle to enter a dormant state.

4. The method according to claim 1, characterized in that: The preset power-off conditions include: the vehicle speed is less than a predetermined vehicle speed threshold, the engine speed is less than a predetermined speed threshold, the belt drive starter generator exits the working state, the DCDC exits the working state, the SOC of the low-voltage battery is greater than a predetermined power threshold, and the current in the high-voltage circuit is less than a predetermined current threshold.

5. A vehicle power-off control device, characterized in that: The device comprises: The HCU is configured to determine whether the state of the vehicle satisfies a preset power-off condition if a vehicle power-off indication triggered by a user is received; start timing if it is determined that the state of the vehicle satisfies the preset power-off condition and the SOC of the power battery is greater than a preset charge threshold; send a relay disconnection request to the BMS if it is detected that the driver is not in the vehicle before the timing reaches a preset time; send the relay disconnection request to the BMS when the timing reaches the preset time; The BMS is configured to control the relay of the power battery to disconnect in response to receiving the relay disconnect request.

6. The device according to claim 5, characterized in that The HCU is also used to: If it is determined that the state of the vehicle satisfies the preset power-off condition and the SOC of the power battery is less than or equal to the predetermined charge threshold, the relay disconnection request is directly sent to the BMS.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 4 are implemented.

8. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 4.

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