Vehicle high-voltage power-on and power-off control method, device, vehicle and storage medium

Abstract

This application relates to the technical field of vehicles, and particularly to a method and device for controlling the high-voltage power-on and power-off of a vehicle, a vehicle, and a storage medium. The method includes: collecting the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal of the vehicle; matching the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; and performing high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system. Thus, the problem that due to the phenomenon of sudden changes in high voltage and large current during the power-on and power-off process of the high-voltage system of the vehicle, improper power-on and power-off sequence may cause safety accidents, resulting in reduced reliability and shortened lifespan of the high-voltage system is solved, and a more precise high-voltage power-on and power-off control method is provided to enhance the reliability and safety of the system.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and particularly to a method and device for controlling the high-voltage power-on and power-off of a vehicle, a vehicle, and a storage medium. Background Art

[0002] Electric vehicles include hybrid electric vehicles and pure electric vehicles. The main feature that differentiates them from traditional vehicles is that electric vehicles have a high-voltage drive system.

[0003] However, this method causes sudden changes in high voltage and large current during the power-on and power-off processes of the high-voltage system of electric vehicles. Improper power-on and power-off sequences can cause faults such as high-voltage contact burnout and high-voltage fuse blowing. In severe cases, the high-voltage contacts may stick together, resulting in an accident where the high voltage cannot be cut off, ultimately leading to a reduction in the reliability and lifespan of the high-voltage system. Moreover, in related technologies, how to coordinate the control of the connection and disconnection of the high-voltage system under different working conditions is also ignored, which is not conducive to the safety and reliability of the system. Summary of the Invention

[0004] This application provides a method and device for controlling the high-voltage power-on and power-off of a vehicle, a vehicle, and a storage medium to solve the problems that during the power-on and power-off processes of the high-voltage system of electric vehicles, there are sudden changes in high voltage and large current, and improper power-on and power-off sequences can cause safety accidents, resulting in a reduction in the reliability and lifespan of the high-voltage system, and to provide a more precise method for controlling the high-voltage power-on and power-off to enhance the reliability and safety of the system.

[0005] The first aspect of the embodiments of this application provides a control method for the high-voltage power-on and power-off of a vehicle, including the following steps:

[0006] Collect the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal of the vehicle;

[0007] Match the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; and

[0008] Perform high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system.

[0009] Optionally, the matching of the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal includes:

[0010] If the DC charging ignition signal is collected and the current state of the battery management system is the charging state or the heating state, the power-on and power-off control strategy of the high-voltage system is the first strategy;

[0011] If the AC charging ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the second strategy;

[0012] If the key ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the third strategy;

[0013] If the remote high-voltage connection request signal is collected, the power-on and power-off control strategy of the high-voltage system is the fourth strategy.

[0014] Optionally, when the power-on and power-off control strategy of the high-voltage system is the first strategy, the high-voltage power-on and power-off control of the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes:

[0015] Control the vehicle's vehicle controller to be in the first target sub-state under the first target state, and send a first high-voltage closing connection command to the high-voltage system and the battery management system;

[0016] When it is detected that the pre-charging is successful sent by the battery management system, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send a second high-voltage closing connection command to the high-voltage system;

[0017] When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, control the vehicle's vehicle controller to enter the third target state, and send a first high-voltage disconnection connection command to the high-voltage system.

[0018] When the vehicle's vehicle controller is in any target sub-state under the first target state, if it is detected that the high-voltage connection prohibition fault, or the pre-charging failure sent by the battery management system, or the DC charging power-off request, or the fast charging gun is pulled out, control the vehicle's vehicle controller to enter the third target state;

[0019] After the vehicle's vehicle controller enters the third target state, if it is detected that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle controller to enter the power-off save state.

[0020] Optionally, when the power-on and power-off control strategy of the high-voltage system is the second strategy, the high-voltage power-on and power-off control of the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes:

[0021] Control the vehicle's vehicle control unit to be in the first target sub-state under the first target state, and send a third high-voltage closing connection command to the high-voltage system and the battery management system;

[0022] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed, control the vehicle's vehicle control unit to enter the second target state, and send a fourth high-voltage closing connection command to the high-voltage system;

[0023] When it is detected that the high-voltage main positive relay is open or the high-voltage main negative relay is open, control the vehicle's vehicle control unit to enter the third target state, and send a second high-voltage disconnecting connection command to the high-voltage system;

[0024] When the vehicle's vehicle control unit is in any target sub-state under the first target state, if the AC charging power-off request and the remote high-voltage power-on request are detected, perform high-voltage power-on and power-off control on the high-voltage system based on the third strategy; if the prohibited high-voltage connection fault is detected, or the battery management system feeds back a pre-charging failure signal, or feeds back an inserted fast charging gun signal, or feeds back a removed fast charging gun signal, or feeds back a removed slow charging gun signal, or feeds back the AC charging power-off request and the keyless ignition signal and no remote high-voltage power-on request, or feeds back the AC charging full signal and the keyless ignition and no remote high-voltage power-on request, then control the vehicle's vehicle control unit to enter the third target state, and when it is detected that the high-voltage main positive relay is cut off, and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle control unit to enter the power-off and save state.

[0025] Optionally, when the power-on and power-off control strategy of the high-voltage system is the third strategy, the performing high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes:

[0026] Control the vehicle's vehicle control unit to be in the first target sub-state under the first target state, and send a fifth high-voltage closing connection command to the high-voltage system and the battery management system;

[0027] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed, control the vehicle's vehicle control unit to enter the second target state, and send a sixth high-voltage closing connection command to the high-voltage system;

[0028] When it is detected that the high-voltage total positive relay is disconnected or the high-voltage total negative relay is disconnected, control the vehicle's vehicle control unit to enter the third target state and send a third high-voltage disconnection command to the high-voltage system;

[0029] When the vehicle's vehicle control unit is in any target sub-state of the first target state, if a slow charge ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the second strategy;

[0030] If it is detected that the high-voltage connection prohibition fault occurs, or the battery management system feeds back the pre-charge failure signal, or feeds back the key power-off request, or feeds back the signal of inserting the fast charge gun, or feeds back the signal of unplugging the fast charge gun, or feeds back the signal of unplugging the slow charge gun, then control the vehicle's vehicle control unit to enter the third target state, and when it is detected in the third target state that the high-voltage total positive relay is cut off, and the high-voltage total negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle control unit to enter the power-off save state.

[0031] Optionally, when the power-on and power-off control strategy of the high-voltage system is the fourth strategy, the high-voltage power-on and power-off control of the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes:

[0032] Control the vehicle's vehicle control unit to be in the first target sub-state of the first target state and send a seventh high-voltage closing command to the high-voltage system and the battery management system;

[0033] When it is detected that the pre-charge is successful sent by the battery management system, and the high-voltage total positive relay is closed, and the high-voltage pre-charge relay is disconnected, and the high-voltage total negative relay is closed, control the vehicle's vehicle control unit to enter the second target state and send an eighth high-voltage closing command to the high-voltage system;

[0034] When it is detected that the high-voltage total positive relay is disconnected or the high-voltage total negative relay is disconnected, control the vehicle's vehicle control unit to enter the third target state and send a fourth high-voltage disconnection command to the high-voltage system;

[0035] When the vehicle's vehicle control unit is in any target sub-state of the first target state, if the slow charge ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the second strategy; if the key ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the third strategy;

[0036] If the high-voltage connection prohibition fault is detected or the battery management system feeds back the pre-charging failure signal, or feeds back the remote high-voltage power-off request, or feeds back the fast-charging gun insertion signal, or feeds back the fast-charging gun removal signal, or feeds back the slow-charging gun removal signal, then the vehicle controller of the vehicle is controlled to enter the third target state, and in the third target state, when it is detected that the high-voltage total positive relay is cut off and the high-voltage total negative relay is closed, and when the high-voltage unloading is completed, the vehicle controller of the vehicle is controlled to enter the power-off saving state.

[0037] Optionally, the vehicle controller controlling the vehicle enters a power-off saving state, including:

[0038] A fifth high-voltage disconnect command is sent to the high-voltage system, and when it is detected that the key is powered on again, or remote high-voltage power is requested again, or DC charging is restarted, or AC charging is restarted, the vehicle controller of the vehicle is controlled to enter the initialization mode.

[0039] A second embodiment of the present application provides a vehicle high-voltage power on / off control device, comprising:

[0040] An acquisition module is used to collect the vehicle's DC charging ignition signal, the current status of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal;

[0041] A matching module, configured to match the power-up and power-down control strategies of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; and

[0042] The control module is used to control the high voltage power on and off of the high voltage system according to the power on and off control strategy of the high voltage system.

[0043] Optionally, the matching module includes:

[0044] If the DC charging ignition signal is collected and the current state of the battery management system is a charging state or a heating state, the power-on and power-off control strategy of the high-voltage system is a first strategy;

[0045] If the AC charging ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the second strategy;

[0046] If the key ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the third strategy;

[0047] If the remote high-voltage connection request signal is collected, the power-on and power-off control strategy of the high-voltage system is the fourth strategy.

[0048] Optionally, when the power-on and power-off control strategy of the high-voltage system is the first strategy, the control module includes:

[0049] Control the vehicle's vehicle controller to be in the first target sub-state under the first target state, and send a first high-voltage closed connection command to the high-voltage system and the battery management system;

[0050] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send a second high-voltage closed connection command to the high-voltage system;

[0051] When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, control the vehicle's vehicle controller to enter the third target state, and send a first high-voltage disconnection command to the high-voltage system.

[0052] When the vehicle's vehicle controller is in any target sub-state under the first target state, if it is detected that the high-voltage connection prohibition fault or the pre-charging failure sent by the battery management system or the DC charging power-off request or the fast charging gun is pulled out, control the vehicle's vehicle controller to enter the third target state;

[0053] After the high-voltage system enters the third target state, if it is detected that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle controller to enter the power-off save state.

[0054] Optionally, when the power-on and power-off control strategy of the high-voltage system is the second strategy, the control module includes:

[0055] Control the vehicle's vehicle controller to be in the first target sub-state under the first target state, and send a third high-voltage closed connection command to the high-voltage system and the battery management system;

[0056] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send a fourth high-voltage closed connection command to the high-voltage system;

[0057] When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, control the vehicle's vehicle controller to enter the third target state, and send a second high-voltage disconnection command to the high-voltage system;

[0058] When the vehicle's vehicle control unit (VCU) is in any target sub-state of the first target state, if the AC charging power-off request and the remote high-voltage power-on request are detected, high-voltage power-on and power-off control of the high-voltage system is performed based on the third strategy; if the prohibited high-voltage connection fault is detected, or the battery management system (BMS) feeds back a pre-charge failure signal, or feeds back an inserted fast-charging gun signal, or feeds back a removed fast-charging gun signal, or feeds back a removed slow-charging gun signal, or feeds back the AC charging power-off request and the keyless ignition signal and no remote high-voltage power-on request, or feeds back the AC charging full signal and the keyless ignition and no remote high-voltage power-on request, then the vehicle's VCU is controlled to enter the third target state, and when it is detected that the high-voltage main positive relay is cut off, and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, the vehicle's VCU is controlled to enter the power-off save state.

[0059] Optionally, when the high-voltage system's power-on and power-off control strategy is the third strategy, the control module includes:

[0060] Control the vehicle's VCU to be in the first target sub-state of the first target state, and send a fifth high-voltage closing connection command to the high-voltage system and the BMS;

[0061] When it is detected that the pre-charge is successful sent by the BMS, and the high-voltage main positive relay is closed, and the high-voltage pre-charge relay is open, and the high-voltage main negative relay is closed, control the vehicle's VCU to enter the second target state, and send a sixth high-voltage closing connection command to the high-voltage system;

[0062] When it is detected that the high-voltage main positive relay is open or the high-voltage main negative relay is open, control the vehicle's VCU to enter the third target state, and send a third high-voltage disconnection connection command to the high-voltage system;

[0063] When the vehicle's VCU is in any target sub-state of the first target state, if a slow-charging ignition signal is detected, high-voltage power-on and power-off control of the high-voltage system is performed based on the second strategy;

[0064] If the prohibited high-voltage connection fault is detected, or the BMS feeds back the pre-charge failure signal, or feeds back the key power-off request, or feeds back an inserted fast-charging gun signal, or feeds back a removed fast-charging gun signal, or feeds back a removed slow-charging gun signal, then control the vehicle's VCU to enter the third target state, and when it is detected in the third target state that the high-voltage main positive relay is cut off, and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's VCU to enter the power-off save state.

[0065] Optionally, when the power-on and power-off control strategy of the high-voltage system is the fourth strategy, the control module includes:

[0066] Control the vehicle's vehicle controller to be in the first target sub-state under the first target state, and send a seventh high-voltage closing connection command to the high-voltage system and the battery management system;

[0067] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage total positive relay is closed, and the high-voltage pre-charging relay is disconnected, and the high-voltage total negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send an eighth high-voltage closing connection command to the high-voltage system;

[0068] When it is detected that the high-voltage total positive relay is disconnected or the high-voltage total negative relay is disconnected, control the vehicle's vehicle controller to enter the third target state, and send a fourth high-voltage disconnection connection command to the high-voltage system;

[0069] When the vehicle's vehicle controller is in any target sub-state under the first target state, if the slow charge ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the second strategy; if the key ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the third strategy;

[0070] If it is detected that the high-voltage connection prohibition fault occurs, or the battery management system feeds back a pre-charging failure signal, or feeds back a remote high-voltage power-off request, or feeds back an inserted fast charge gun signal, or feeds back a removed fast charge gun signal, or feeds back a removed slow charge gun signal, then control the vehicle's vehicle controller to enter the third target state, and when it is detected in the third target state that the high-voltage total positive relay is cut off, and the high-voltage total negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle controller to enter the power-off save state.

[0071] Optionally, controlling the vehicle's vehicle controller to enter the power-off save state includes:

[0072] Send a fifth high-voltage disconnection connection command to the high-voltage system, and when it is detected that the key is re-powered on, or a remote high-voltage power-on request again, or a DC charging restart, or an AC charging restart, control the vehicle's vehicle controller to enter the initialization mode.

[0073] A third aspect embodiment of the present application provides a vehicle, including: at least one processor; and a memory communicatively connected to the at least one processor; wherein, the memory stores instructions executable by the at least one processor, and the instructions are configured to execute the vehicle high-voltage power-on and power-off control method as described in the above embodiments.

[0074] A fourth aspect embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and the program is executed by a processor to implement the vehicle high-voltage power-on and power-off control method as described in the above embodiments.

[0075] Thus, by collecting the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal of the vehicle, and matching the high-voltage system's power-on and power-off control strategy according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal, and performing high-voltage power-on and power-off control on the high-voltage system according to the high-voltage system's power-on and power-off control strategy. Thus, the problem that due to the phenomenon of sudden change of high voltage and large current during the power-on and power-off process of the high-voltage system of an electric vehicle, improper power-on and power-off sequence may cause safety accidents, resulting in reduced reliability and shortened lifespan of the high-voltage system is solved, a more precise high-voltage power-on and power-off control method is provided, and the reliability and safety of the system are enhanced.

[0076] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] The above and / or additional aspects and advantages of the present application will become apparent and easy to understand from the following description of the embodiments in conjunction with the drawings, wherein:

[0078] Figure 1 is a flowchart of the vehicle high-voltage power-on and power-off control method according to an embodiment of the present application;

[0079] Figure 2 is a schematic diagram of the vehicle high-voltage power-on and power-off control logic according to an embodiment of the present application;

[0080] Figure 3 is a schematic diagram of an intelligent vehicle system according to an embodiment of the present application;

[0081] Figure 4 is a block diagram of the vehicle high-voltage power-on and power-off control device according to an embodiment of the present application;

[0082] Figure 5 is a schematic diagram of the structure of the vehicle according to an embodiment of the present application. Detailed implementation manners

[0083] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0084] The vehicle high-voltage power-on and power-off control method, device, vehicle and storage medium according to the embodiments of the present application will be described below with reference to the accompanying drawings. In view of the problem mentioned in the above background art that due to the sudden change of high voltage and large current during the power-on and power-off process of the high-voltage system of electric vehicles, improper power-on and power-off sequences may cause safety accidents, resulting in reduced reliability and shortened life of the high-voltage system, the present application provides a vehicle high-voltage power-on and power-off control method. In this method, by collecting the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal and the remote high-voltage connection request signal of the vehicle, and matching the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal and the remote high-voltage connection request signal, and performing high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system. Thereby, the problem that due to the sudden change of high voltage and large current during the power-on and power-off process of the high-voltage system of electric vehicles, improper power-on and power-off sequences may cause safety accidents, resulting in reduced reliability and shortened life of the high-voltage system is solved, a more accurate high-voltage power-on and power-off control method is provided, and the reliability and safety of the system are enhanced.

[0085] Specifically, Figure 1 is a schematic flow chart of a vehicle high-voltage power-on and power-off control method provided by an embodiment of the present application.

[0086] As Figure 1 shown, the vehicle high-voltage power-on and power-off control method includes the following steps:

[0087] In step S101, the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal and the remote high-voltage connection request signal of the vehicle are collected.

[0088] It should be understood that, in order to further improve the safety and reliability of the vehicle, the embodiments of the present application can control the vehicle's vehicle controller to enter the corresponding state based on the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal and the remote high-voltage connection request signal of the vehicle, so as to coordinately control the connection and disconnection of the high-voltage system.

[0089] It should be noted that before collecting the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal, the embodiment of the present application can control the vehicle's vehicle control unit (VCU) to first enter the initialization state (i.e., the Init state) after waking up the vehicle. The high-voltage connection command in the Init state is disconnected and sent to the battery management system (BMS) through the Controller Area Network (CAN).

[0090] Among them, if no key ignition signal, no AC charging ignition signal, no DC charging ignition signal, and no network wake-up request (i.e.,!kl15ignition &&!Schgignition &&!Fchgignition &&!Canwakeup) are detected in the initialization state (i.e., Init), the power-down save state (i.e., the Afterrun state) is entered.

[0091] In step S102, the power-on and power-off control strategy of the high-voltage system is matched according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal.

[0092] Optionally, in some embodiments, matching the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal includes: if the DC charging ignition signal is collected and the current state of the battery management system is the charging state or the heating state, the power-on and power-off control strategy of the high-voltage system is the first strategy; if the AC charging ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the second strategy; if the key ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the third strategy; if the remote high-voltage connection request signal is collected, the power-on and power-off control strategy of the high-voltage system is the fourth strategy.

[0093] Specifically, as Figure 2As shown, in the Init state, when it is detected that the BMS and CAN communications are normal, the battery system is in the ready state, there is no high-voltage connection prohibition fault, and the low-voltage battery voltage is greater than 9V (that is, when it is detected that BMS_CAN_rx_ok && BMS_ready &&!disBatt_fault && LvBattVolt>9v), if a DC charging ignition signal is detected and (the battery system is in the heating or charging state) (that is, when it is detected that Fchg_ignition && (chgmode == charging || chgmode == heating)), enter the first strategy; if an AC charging ignition signal is detected (that is, when it is detected that: Schg_igniton), enter the second strategy; if a key ignition signal is detected (that is, when it is detected that KL_ignition), enter the third strategy; if a remote high-voltage connection request is detected (that is, when it is detected that HV_cnnt_req), enter the fourth strategy.

[0094] In step S103, the high-voltage power-on and power-off control of the high-voltage system is performed according to the high-voltage system's power-on and power-off control strategy.

[0095] Further, in some embodiments, when the high-voltage system's power-on and power-off control strategy is the first strategy, the high-voltage power-on and power-off control of the high-voltage system according to the high-voltage system's power-on and power-off control strategy includes: controlling the vehicle's vehicle controller to be in the first target sub-state in the first target state, and sending a first high-voltage closed connection command to the high-voltage system and the battery management system; when it is detected that the pre-charging of the battery management system is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle controller to enter the second target state, and sending a second high-voltage closed connection command to the high-voltage system; when it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, controlling the vehicle's vehicle controller to enter the third target state, and sending a first high-voltage disconnection command to the high-voltage system. When the vehicle's vehicle controller is in any target sub-state in the first target state, if a high-voltage connection prohibition fault or a pre-charging failure issued by the battery management system or a DC charging power-off request or a fast charging gun is unplugged is detected, controlling the vehicle's vehicle controller to enter the third target state; after the vehicle's vehicle controller enters the third target state, if it is detected that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, controlling the vehicle's vehicle controller to enter the power-off save state.

[0096] Among them, the first target state can be the HVcnnt state, the first target sub-state can be the Prechg state, the second target state can be the Cnnted state, the third target state can be the HVDisCnn state, and the power-off save state can be the AfterRun state.

[0097] Specifically, as Figure 2 shown, when the power-on and power-off control strategy of the high-voltage system is the first strategy, first enter the first target sub-state (i.e., the Prechg state) in the first target state (i.e., the HVcnnt state). In the first target sub-state (i.e., the Prechg state), send the high-voltage connection command to be closed and send it to the battery management system (BMS) through CAN;

[0098] Then, when it is detected that the BMS feedbacks successful pre-charging, the high-voltage total positive relay is closed, the high-voltage pre-charging relay is off, and the high-voltage total negative relay is closed (i.e., Prechgok&&PosContok&&PrechgContoff&&NegContok) are detected, enter the first target state (i.e., the Cnnted state). In this state, the high-voltage connection command remains closed;

[0099] When it is detected that the high-voltage total positive relay is off or the high-voltage total negative relay is off (i.e., PosContoff||NegContoff) in the second target state (i.e., the Cnnted state), enter the third target state, i.e., the HVDisCnnt state. In this state, the high-voltage connection command is off;

[0100] In addition, when it is detected that a high-voltage connection prohibition fault, BMS feedback pre-charging failure, DC charging power-off request, or fast charging gun unplugging (i.e., DisBatt||PrechgFail||Fchgshutdown_req||PlugoutFchg) is detected in any sub-state of the first target state (i.e., the HVcnnt state), also enter the third target state (i.e., the HVDisCnnt state); when it is detected in the third target state (i.e., the HVDisCnnt state) that the high-voltage total positive relay is cut off, the high-voltage total negative relay is closed, and the high-voltage unloading is completed (i.e., PosContoff&&NegContoff&&mcu-offload-ok), enter the power-off save state (i.e., the AfterRun state).

[0101] Further, in some embodiments, when the power-on and power-off control strategy of the high-voltage system is the second strategy, the high-voltage power-on and power-off control of the high-voltage system is performed according to the power-on and power-off control strategy of the high-voltage system, including: controlling the vehicle's vehicle control unit to be in the first target sub-state in the first target state, and sending a third high-voltage closing connection command to the high-voltage system and the battery management system; when it is detected that the pre-charging by the battery management system is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle control unit to enter the second target state, and sending a fourth high-voltage closing connection command to the high-voltage system; when it is detected that the high-voltage main positive relay is open or the high-voltage main negative relay is open, controlling the vehicle's vehicle control unit to enter the third target state, and sending a second high-voltage disconnection command to the high-voltage system; when the vehicle's vehicle control unit is in any target sub-state in the first target state, if an AC charging power-off request and a remote high-voltage power-on request are detected, the high-voltage power-on and power-off control of the high-voltage system is performed based on the third strategy; if a prohibited high-voltage connection fault is detected, or the battery management system feeds back a pre-charging failure signal, or feeds back an inserted fast charging gun signal, or feeds back a removed fast charging gun signal, or feeds back a removed slow charging gun signal, or feeds back an AC charging power-off request and a no-key ignition signal and no remote high-voltage request, or feeds back an AC charging full signal and no-key ignition and no remote high-voltage request, controlling the vehicle's vehicle control unit to enter the third target state, and when it is detected that the high-voltage main positive relay is cut off, the high-voltage main negative relay is closed, and the high-voltage unloading is completed, controlling the vehicle's vehicle control unit to enter the power-off save state.

[0102] Specifically, as Figure 2 shown, when the power-on and power-off control strategy of the high-voltage system is the second strategy, first enter the first target sub-state (Prechg state) in the first target state (i.e., the HVcnnt state). In the first target sub-state (i.e., the Prechg state), the high-voltage connection command is sent as closed and sent to the BMS via CAN;

[0103] Then, when it is detected that the BMS feedback pre-charging is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed (i.e., Prechgok&&PosContok&&PrechgContoff&&NegContok) is detected, enter the second target state (i.e., the Cnnted state). In this state, the high-voltage connection command remains closed;

[0104] When it is detected that the high-voltage main positive relay is open or the high-voltage main negative relay is open (i.e., PosContoff||NegContoff) in the second target state (i.e., the Cnnted state), enter the third target state (HVDisCnnt state). In this state, the high-voltage connection command is open;

[0105] When an AC charging power-off request and a remote high-voltage power-on request (i.e., Schgshutdown_req && HV_cnnt_req) are detected in any target sub-state in the first target state (i.e., the HVcnnt state), the high-voltage system is controlled for high-voltage power-on and power-off based on the third strategy (i.e., enter the Remote state); additionally, when a prohibited high-voltage connection fault is detected in any target sub-state in the first target state (i.e., the HVcnnt state), or the BMS feeds back a pre-charge failure signal, or an express charging gun insertion signal, or an express charging gun removal signal, or a slow charging gun removal signal, or an AC charging power-off request is fed back and there is no key ignition and no remote high-voltage power-on request, or an AC charging full signal is fed back and there is no key ignition and no remote high-voltage power-on request (i.e., when DisBatt || PrechgFail || (Schgshutdown_req && (!kl15ignition &&!HV_cnnt_req)) || pluginFchg || PlugoutFchg || PlugoutSchg || (SchgFinish &&!KL_igntion &&!HV_cnnt_req) is detected), it also enters the third target state (i.e., the HVDisCnnt state); when it is detected in the third target state (i.e., the HVDisCnnt state) that the high-voltage main positive relay is cut off, the high-voltage main negative relay is closed, and the high-voltage unloading is completed (i.e., PosContoff && NegContoff && mcu-offload-ok), it enters the power-off save state (i.e., the AfterRun state).

[0106] Further, in some embodiments, when the power-on and power-off control strategy of the high-voltage system is the third strategy, the high-voltage power-on and power-off control of the high-voltage system is performed according to the power-on and power-off control strategy of the high-voltage system, including: controlling the vehicle's vehicle control unit to be in the first target sub-state in the first target state, and sending the fifth high-voltage closing connection command to the high-voltage system and the battery management system; when it is detected that the pre-charging of the battery management system is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle control unit to enter the second target state, and sending the sixth high-voltage closing connection command to the high-voltage system; when it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, controlling the vehicle's vehicle control unit to enter the third target state, and sending the third high-voltage disconnection connection command to the high-voltage system; when the vehicle's vehicle control unit is in any target sub-state in the first target state, if a slow charge ignition signal is detected, the high-voltage power-on and power-off control of the high-voltage system is performed based on the second strategy; if a prohibited high-voltage connection fault is detected, or the battery management system feeds back a pre-charging failure signal, or a key power-off request is fed back, or an inserted fast charge gun signal is fed back, or a removed fast charge gun signal is fed back, or a removed slow charge gun signal is fed back, then controlling the vehicle's vehicle control unit to enter the third target state, and when it is detected in the third target state that the high-voltage main positive relay is cut off, the high-voltage main negative relay is closed, and the high-voltage unloading is completed, controlling the vehicle's vehicle control unit to enter the power-off save state.

[0107] Specifically, as Figure 2 shown, when the power-on and power-off control strategy of the high-voltage system is the third strategy, first enter the first target sub-state (i.e., the Prechg state) in the first target state (i.e., the HVcnnt state), and send the high-voltage connection command as closed in the first target sub-state (i.e., the Prechg state), and send it to the battery management system (BMS) through CAN;

[0108] Then, when it is detected that the BMS feedback pre-charging is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed (i.e., Prechgok&&PosContok&&PrechgContoff&&NegContok), enter the second target state (i.e., the Cnnted state), and the high-voltage connection command remains closed in this state;

[0109] When it is detected in the second target state (i.e., the Cnnted state) that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected (i.e., PosContoff||NegContoff), enter the third target sub-state (i.e., the HVDisCnnt state), and the high-voltage connection command remains disconnected in this state;

[0110] When a slow charge ignition signal (i.e., Schg_ignition) is detected in any sub-state of the first target state (i.e., the HVcnnt state), high-voltage power on / off control is performed on the high-voltage system based on the second strategy (i.e., enter the Schg state).

[0111] In addition, when a prohibited high-voltage connection fault or BMS feedback of pre-charge failure or key power-off request or insertion of a fast charge gun or removal of a fast charge gun or removal of a slow charge gun (i.e., DisBatt||PrechgFail||KLshutdown_req||pluginFchg||PlugoutFchg||PlugoutSchg) is detected in any target sub-state of the first target state (i.e., the HVcnnt state), it also enters the third target state (i.e., the HVDisCnnt state); when it is detected in the third target state (i.e., the HVDisCnnt state) that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed and the high-voltage unloading is completed (i.e., PosContoff&&NegContoff&&mcu-offload-ok), it enters the power-off save state (i.e., the AfterRun state).

[0112] Furthermore, in some embodiments, when the power on / off control strategy of the high-voltage system is the fourth strategy, high-voltage power on / off control is performed on the high-voltage system according to the power on / off control strategy of the high-voltage system, including: controlling the vehicle's vehicle control unit to be in the first target sub-state of the first target state and sending a seventh high-voltage closed connection command to the high-voltage system and the battery management system; when it is detected that the pre-charge of the battery management system is successful, and the high-voltage main positive relay is closed, and the high-voltage pre-charge relay is disconnected, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle control unit to enter the second target state and sending an eighth high-voltage closed connection command to the high-voltage system; when it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, controlling the vehicle's vehicle control unit to enter the third target state and sending a fourth high-voltage disconnected connection command to the high-voltage system; when the vehicle's vehicle control unit is in any target sub-state of the first target state, if a slow charge ignition signal is detected, high-voltage power on / off control is performed on the high-voltage system based on the second strategy; if a key ignition signal is detected, high-voltage power on / off control is performed on the high-voltage system based on the third strategy; if a prohibited high-voltage connection fault or a pre-charge failure signal feedback from the battery management system, or a remote high-voltage power-off request feedback, or an inserted fast charge gun signal feedback, or a removed fast charge gun signal feedback, or a removed slow charge gun signal feedback is detected, then control the vehicle's vehicle control unit to enter the third target state, and when it is detected in the third target state that the high-voltage main positive relay is cut off, and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle control unit to enter the power-off save state.

[0113] Specifically, such asFigure 2 As shown, when the power-on and power-off control strategy of the high-voltage system is the fourth strategy, first enter the first target sub-state (i.e., Prechg state) in the first target state (i.e., HVcnnt state). Send the high-voltage connection command as closed in the first target sub-state (i.e., Prechg state) and send it to the BMS through the CAN;

[0114] Then, when it is detected that the BMS feedback pre-charging is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is off, and the high-voltage main negative relay is closed (i.e., Prechgok&&PosContok&&PrechgContoff&&NegContok), enter the second target state (i.e., Cnnted state). In this state, the high-voltage connection command remains closed;

[0115] When it is detected in the second target state (i.e., Cnnted state) that the high-voltage main positive relay is off or the high-voltage main negative relay is off (i.e., PosContoff||NegContoff), enter the third target sub-state (i.e., HVDisCnnt state). In this state, the high-voltage connection command is off;

[0116] When slow charge ignition (i.e., Schg_ignition) is detected in any target sub-state in the first target state (i.e., Vcnnt state), perform high-voltage power-on and power-off control on the high-voltage system based on the second strategy (i.e., enter the Schg state). When the key ignition signal (i.e., KL_ignition) is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the third strategy (i.e., enter the Key state);

[0117] When a high-voltage connection prohibition fault is detected, or the BMS feedback pre-charging failure signal, or the feedback remote high-voltage power-off request, or the insertion of the fast charge gun signal, or the removal of the fast charge gun signal, or the removal of the slow charge gun signal (i.e., DisBatt||PrechgFail||HV_disCnnt_req||pluginFchg||PlugoutFchg||PlugoutSchg) is detected in any sub-state in the first target state (i.e., HVcnnt state), also enter the third target state (i.e., HVDisCnnt state). When it is detected in the third target state (i.e., HVDisCnnt state) that the high-voltage main positive relay is cut off, the high-voltage main negative relay is closed, and the high-voltage unloading is completed (i.e., PosContoff&&NegContoff&&mcu-offload-ok), enter the power-off save (i.e., AfterRun state).

[0118] Further, in some embodiments, controlling the vehicle's vehicle control unit to enter the power-off save state includes: sending a fifth high-voltage disconnection command to the high-voltage system, and when detecting that the key is powered on again, or a remote high-voltage power-on request again, or a DC charging restart, or an AC charging restart, controlling the vehicle's vehicle control unit to enter the initialization mode.

[0119] Specifically, as Figure 2 shown, controlling the vehicle's vehicle control unit to enter the power-off save state (i.e., the AfterRun state), in which the high-voltage connection command remains disconnected, and when detecting that the key is powered on again, or a remote high-voltage power-on request again, or a DC charging restart, or an AC charging restart (i.e., KL_igntion_rise||HVcnnt_req_rise||Fchgignition_rise||Schgigniton_rise), it enters the initialization state (i.e., the Init state).

[0120] To enable those skilled in the art to further understand the vehicle high-voltage power-on and power-off control method of the embodiments of the present application, the following will be elaborated in detail with specific embodiments.

[0121] As Figure 3 shown, Figure 3 is a schematic block diagram of a system of an intelligent vehicle provided according to an embodiment of the present application.

[0122] The intelligent vehicle of the embodiments of the present application includes a power battery system (including BMS, high-voltage relay, battery module, etc.), a high-voltage distribution control unit (Power Distribution Unit, PDU), a motor control unit (Microcontroller Unit, MCU), a motor, an electric compressor, an automotive heater (Positive Temperature Coefficient, PTC), a collision mitigation braking system (Collision Mitigation Braking System, CMDC), a VCU, an in-vehicle intelligent terminal (Telematics BOX, T-BOX), a DC charging interface, an AC charging interface, etc.

[0123] Among them, the battery management system collects and monitors the status of the battery module in real time, controls the closing and opening of the high-voltage relay according to the high-voltage closing instruction of the vehicle control unit and the high-voltage system status, and controls and manages AC / DC charging; the high-voltage distribution control unit is responsible for the circuit distribution of the high-voltage circuit and the overcurrent protection of the corresponding current; the motor control module collects the motor status in real time and responds to the torque command of the vehicle control unit.

[0124] The electric compressor and PTC are high-voltage accessories for the air-conditioning system; the CMDC is an integrated unit of a charger and a DCDC (Direct Current - Direct Current), which converts high-voltage electricity into 12V to supply power to the low-voltage system. At the same time, during AC charging, it conducts handshake interactions with the AC charging equipment, BMS, and VCU to achieve AC charging; the T-BOX is a networked control unit that monitors and controls the vehicle status, transmits vehicle information to the cloud platform via wireless communication. At the same time, users can use the mobile APP (Application) and Web (World Wide Web) client to send instructions to the T-BOX terminal through the cloud platform to control the vehicle. The AC / DC charging port is connected to the charging equipment.

[0125] The vehicle controller can collect the requirements of electronic control units such as BMS, MCU, CMDC, T-BOX, etc. and the status of each system through CAN and influence through CAN. At the same time, it collects the status of the key, AC charging status, accelerator, brake, gear, high-voltage loop interlock, etc. through hard wires. Then, according to the status of each system and the driver's request, it manages the closing or opening of the high-voltage system and sends corresponding control instructions to each module control unit. After receiving the closing instruction, the BMS controls the high-voltage relay to complete the connection of the high-voltage system according to a certain timing sequence. After receiving the opening instruction, it controls the high-voltage relay to disconnect the connection of the high-voltage system according to a certain timing sequence.

[0126] The vehicle controller designs six states, namely Init (initialization) state, Remote (remote control) state, Key (local key power-on) state, Fchg (DC charging) state, Schg (AC charging) state, and AfterRun (power-off) state, to manage and control the high-voltage power-on and power-off according to the system status and driver requirements.

[0127] The vehicle controller has two wake-up methods, CAN network and hard wire. After waking up, it enters the Init state. In the Init state, when the conditions are met, it preferentially responds and enters the Fchg state, followed by the Schg state, then the Key state, and finally the Remote state. Among them, the Remote state, Key state, Fchg state, and Schg state are switched according to the priority and actual working conditions to meet the functional requirements of the vehicle under the premise of ensuring safety. In the Remote state, Key state, Fchg state, and Schg state, when it is detected that the battery management system feedbacks that both the high-voltage total positive relay and the total negative relay are disconnected, and the motor management system feedbacks that the high-voltage unloading is completed, it enters the AfterRun state.

[0128] Through effective control of the timing of the above states, vehicle functions such as key power-on and power-off, AC charging start and end, DC charging start and end, remote control of high-voltage connection and disconnection, and high-power output can be achieved, as well as switching between different functions.

[0129] A vehicle high-voltage power-on and power-off control method according to an embodiment of the present application collects a DC charging ignition signal, the current state of the battery management system, an AC charging ignition signal, a key ignition signal, and a remote high-voltage connection request signal of the vehicle, matches the high-voltage system's power-on and power-off control strategy according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal, and performs high-voltage power-on and power-off control on the high-voltage system according to the high-voltage system's power-on and power-off control strategy. Thus, the problem that due to the phenomenon of sudden changes in high voltage and large current during the power-on and power-off process of the high-voltage system of an electric vehicle, improper power-on and power-off sequences may cause safety accidents, resulting in reduced reliability and shortened lifespan of the high-voltage system is solved, and a more precise high-voltage power-on and power-off control method is provided to enhance the reliability and safety of the system.

[0130] Next, a vehicle high-voltage power-on and power-off control device according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0131] Figure 4 It is a block diagram of the vehicle high-voltage power-on and power-off control device according to an embodiment of the present application.

[0132] As Figure 4 shown, the vehicle high-voltage power-on and power-off control device 10 includes: a collection module 100, a matching module 200, and a control module 300.

[0133] Among them, the collection module 100 is used to collect the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal of the vehicle;

[0134] The matching module 200 is used to match the high-voltage system's power-on and power-off control strategy according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; and

[0135] The control module 300 is used to perform high-voltage power-on and power-off control on the high-voltage system according to the high-voltage system's power-on and power-off control strategy.

[0136] Optionally, in some embodiments, the matching module 200 includes:

[0137] If a DC charging ignition signal is collected and the current state of the battery management system is a charging state or a heating state, the high-voltage system's power-on and power-off control strategy is the first strategy;

[0138] If an AC charging ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the second strategy;

[0139] If a key ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the third strategy;

[0140] If a remote high-voltage connection request signal is collected, the power-on and power-off control strategy of the high-voltage system is the fourth strategy.

[0141] Optionally, in some embodiments, when the power-on and power-off control strategy of the high-voltage system is the first strategy, the control module 300 includes:

[0142] Control the high-voltage system to be in the first target sub-state under the first target state, and send a first high-voltage closed connection command to the high-voltage system and the battery management system;

[0143] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send a second high-voltage closed connection command to the high-voltage system;

[0144] When it is detected that the high-voltage main positive relay is open or the high-voltage main negative relay is open, control the vehicle's vehicle controller to enter the third target state, and send a first high-voltage open connection command to the high-voltage system.

[0145] When the vehicle's vehicle controller is in any target sub-state under the first target state, if it is detected that there is a prohibited high-voltage connection fault, or a pre-charging failure sent by the battery management system, or a DC charging power-off request, or the fast-charging gun is unplugged, control the vehicle's vehicle controller to enter the third target state;

[0146] After the high-voltage system enters the third target state, if it is detected that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle controller to enter the power-off save state.

[0147] Optionally, in some embodiments, when the power-on and power-off control strategy of the high-voltage system is the second strategy, the control module 300 includes:

[0148] Control the high-voltage system to be in the first target sub-state under the first target state, and send a third high-voltage closed connection command to the high-voltage system and the battery management system;

[0149] When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send a fourth high-voltage closed connection command to the high-voltage system;

[0150] When it is detected that the high-voltage total positive relay is disconnected or the high-voltage total negative relay is disconnected, the vehicle's vehicle control unit is controlled to enter the third target state, and a second high-voltage disconnection command is sent to the high-voltage system;

[0151] When the vehicle's vehicle control unit is in any target sub-state of the first target state, if an AC charging power-off request and a remote high-voltage power-on request are detected, the high-voltage system is controlled for high-voltage power-on and power-off based on the third strategy; if a prohibited high-voltage connection fault is detected, or the battery management system feeds back a pre-charging failure signal, or a fast charging gun insertion signal, or a fast charging gun removal signal, or a slow charging gun removal signal, or an AC charging power-off request and a no-key ignition signal and no remote high-voltage request, or an AC charging full signal and no key ignition and no remote high-voltage request, the vehicle's vehicle control unit is controlled to enter the third target state, and when it is detected that the high-voltage total positive relay is cut off, and the high-voltage total negative relay is closed, and the high-voltage unloading is completed, the vehicle's vehicle control unit is controlled to enter the power-off save state.

[0152] Optionally, in some embodiments, when the high-voltage system power-on and power-off control strategy is the third strategy, the control module 300 includes:

[0153] Control the high-voltage system to be in the first target sub-state of the first target state, and send a fifth high-voltage connection command to the high-voltage system and the battery management system;

[0154] When it is detected that the pre-charging of the battery management system is successful, and the high-voltage total positive relay is closed, and the high-voltage pre-charging relay is disconnected, and the high-voltage total negative relay is closed, the vehicle's vehicle control unit is controlled to enter the second target state, and a sixth high-voltage connection command is sent to the high-voltage system;

[0155] When it is detected that the high-voltage total positive relay is disconnected or the high-voltage total negative relay is disconnected, the vehicle's vehicle control unit is controlled to enter the third target state, and a third high-voltage disconnection command is sent to the high-voltage system;

[0156] When the vehicle's vehicle control unit is in any target sub-state of the first target state, if a slow charging ignition signal is detected, the high-voltage system is controlled for high-voltage power-on and power-off based on the second strategy;

[0157] If a prohibited high-voltage connection fault is detected, or the battery management system feeds back a pre-charging failure signal, or a key power-off request is fed back, or a fast charging gun insertion signal, or a fast charging gun removal signal, or a slow charging gun removal signal is detected, the vehicle's vehicle control unit is controlled to enter the third target state, and when it is detected in the third target state that the high-voltage total positive relay is cut off, and the high-voltage total negative relay is closed, and the high-voltage unloading is completed, the vehicle's vehicle control unit is controlled to enter the power-off save state.

[0158] Optionally, in some embodiments, when the power-on and power-off control strategy of the high-voltage system is the fourth strategy, the control module 300 includes:

[0159] Control the high-voltage system to be in the first target sub-state under the first target state, and send the seventh high-voltage closing connection command to the high-voltage system and the battery management system;

[0160] When it is detected that the pre-charging is successful sent by the battery management system, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, control the vehicle's vehicle controller to enter the second target state, and send the eighth high-voltage closing connection command to the high-voltage system;

[0161] When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, control the vehicle's vehicle controller to enter the third target state, and send the fourth high-voltage disconnection command to the high-voltage system;

[0162] When the vehicle's vehicle controller is in any target sub-state under the first target state, if a slow charge ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the second strategy; if a key ignition signal is detected, perform high-voltage power-on and power-off control on the high-voltage system based on the third strategy;

[0163] If it is detected that there is a prohibited high-voltage connection fault, or the battery management system feeds back a pre-charge failure signal, or feeds back a remote high-voltage power-off request, or feeds back an inserted fast charge gun signal, or feeds back a removed fast charge gun signal, or feeds back a removed slow charge gun signal, then control the vehicle's vehicle controller to enter the third target state, and when it is detected in the third target state that the high-voltage main positive relay is cut off, the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle controller to enter the power-off save state.

[0164] Optionally, in some embodiments, controlling the vehicle's vehicle controller to enter the power-off save state includes:

[0165] Send the fifth high-voltage disconnection command to the high-voltage system, and when it is detected that the key is re-powered on, or a remote high-voltage power-on request again, or a DC charging restart, or an AC charging restart, control the vehicle's vehicle controller to enter the initialization mode.

[0166] It should be noted that the foregoing explanation of the embodiments of the vehicle high-voltage power-on and power-off control method also applies to the vehicle high-voltage power-on and power-off control device of this embodiment, and will not be elaborated here.

[0167] The vehicle high-voltage power-on and power-off control device proposed according to the embodiments of the present application collects the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal of the vehicle, matches the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal, and performs high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system. Thus, the problem that due to the sudden change of high voltage and large current during the power-on and power-off process of the high-voltage system of electric vehicles, improper power-on and power-off sequence will cause safety accidents, resulting in reduced reliability and shortened life of the high-voltage system is solved, a more precise high-voltage power-on and power-off control method is provided, and the reliability and safety of the system are enhanced.

[0168] Figure 5 The structure diagram of the vehicle provided by the embodiment of the present application. The vehicle may include:

[0169] A memory 501, a processor 502, and a computer program stored on the memory 501 and executable on the processor 502.

[0170] When the processor 502 executes the program, it implements the vehicle high-voltage power-on and power-off control method provided in the above embodiment.

[0171] Further, the vehicle further includes:

[0172] A communication interface 503 for communication between the memory 501 and the processor 502.

[0173] The memory 501 is used to store a computer program executable on the processor 502.

[0174] The memory 501 may include a high-speed RAM memory, and may also include a non-volatile memory, such as at least one disk memory.

[0175] If the memory 501, the processor 502, and the communication interface 503 are implemented independently, the communication interface 503, the memory 501, and the processor 502 can be interconnected through a bus and communicate with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5It is represented only by a thick line, but it does not mean that there is only one bus or one type of bus.

[0176] Optionally, in a specific implementation, if the memory 501, the processor 502, and the communication interface 503 are integrated on a single chip, the memory 501, the processor 502, and the communication interface 503 can communicate with each other through an internal interface.

[0177] The processor 502 may be a central processing unit (CPU for short), or an application specific integrated circuit (ASIC for short), or one or more integrated circuits configured to implement the embodiments of the present application.

[0178] The embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the vehicle high-voltage power-on and power-off control method as described above is implemented.

[0179] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0180] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "N" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0181] Any process or method description, whether in a flowchart or otherwise described herein, can be understood to represent a module, segment, or portion of code that includes one or more executable instructions for implementing a customized logical function or process. The scope of the preferred embodiments of the present application includes additional implementations, where functions may be executed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of the present application pertain.

[0182] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits having logic gate circuits for implementing logical functions on data signals, application specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0183] Those of ordinary skill in the art can understand that all or part of the steps carried out in the method of the above embodiments can be completed by instructing relevant hardware through a program. The program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

Claims

1. A vehicle high-voltage power-on and power-off control method, characterized in that Including the following steps: Collect the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal of the vehicle; Match the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; and Perform high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system, The matching of the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal includes: if the DC charging ignition signal is collected and the current state of the battery management system is the charging state or the heating state, the power-on and power-off control strategy of the high-voltage system is the first strategy; if the AC charging ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the second strategy; if the key ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the third strategy; if the remote high-voltage connection request signal is collected, the power-on and power-off control strategy of the high-voltage system is the fourth strategy; When the power-on and power-off control strategy of the high-voltage system is the first strategy, the performing of the high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes: controlling the vehicle's vehicle control unit to be in the first target sub-state under the first target state, and sending a first high-voltage closing connection command to the high-voltage system and the battery management system; when it is detected that the pre-charging of the battery management system is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle control unit to enter the second target state and sending a second high-voltage closing connection command to the high-voltage system; when it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, controlling the vehicle's vehicle control unit to enter the third target state and sending a first high-voltage disconnecting connection command to the high-voltage system; when the vehicle's vehicle control unit is in any target sub-state under the first target state, if it is detected that there is a prohibited high-voltage connection fault or the pre-charging failure issued by the battery management system or the DC charging power-off request or the fast charging gun is pulled out, controlling the vehicle's vehicle control unit to enter the third target state; after controlling the vehicle's vehicle control unit to enter the third target state, if it is detected that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed and the high-voltage unloading is completed, controlling the vehicle's vehicle control unit to enter the power-off save state; Wherein, the first target state is the HVcnnt state, the first target sub-state is the Prechg state, the second target state is the Cnnted state, the third target state is the HVDisCnn state, and the power-off save state is the AfterRun state.

2. The method according to claim 1, wherein When the power-on and power-off control strategy of the high-voltage system is the second strategy, the high-voltage power-on and power-off control of the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes: Controlling the vehicle's vehicle controller to be in the first target sub-state in the first target state, and sending a third high-voltage closing connection command to the high-voltage system and the battery management system; When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle controller to enter the second target state, and sending a fourth high-voltage closing connection command to the high-voltage system; When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, controlling the vehicle's vehicle controller to enter the third target state, and sending a second high-voltage disconnection connection command to the high-voltage system; When the vehicle's vehicle controller is in any target sub-state in the first target state, if the AC charging power-off request and the remote high-voltage power-on request are detected, the high-voltage power-on and power-off control of the high-voltage system is performed based on the third strategy; if the prohibited high-voltage connection fault is detected, or the battery management system feeds back a pre-charging failure signal, or feeds back an inserted fast charging gun signal, or feeds back a removed fast charging gun signal, or feeds back a removed slow charging gun signal, or feeds back the AC charging power-off request and the no-key ignition signal and no remote high-voltage request, or feeds back the AC charging full signal and the no-key ignition and no remote high-voltage request, then control the vehicle's vehicle controller to enter the third target state, and when it is detected that the high-voltage main positive relay is cut off, and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, control the vehicle's vehicle controller to enter the power-off save state.

3. The method according to claim 2, wherein When the power-on and power-off control strategy of the high-voltage system is the third strategy, the high-voltage power-on and power-off control of the high-voltage system according to the power-on and power-off control strategy of the high-voltage system includes: Controlling the vehicle's vehicle controller to be in the first target sub-state in the first target state, and sending a fifth high-voltage closing connection command to the high-voltage system and the battery management system; When it is detected that the pre-charging is successful sent by the battery management system, and the high-voltage main positive relay is closed, and the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle controller to enter the second target state, and sending a sixth high-voltage closing connection command to the high-voltage system; When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, controlling the vehicle's vehicle controller to enter the third target state, and sending a third high-voltage disconnection connection command to the high-voltage system; When the vehicle's vehicle controller is in any target sub-state in the first target state, if the slow charging ignition signal is detected, the high-voltage power-on and power-off control of the high-voltage system is performed based on the second strategy; If the high-voltage connection prohibition fault is detected, or the battery management system feeds back the pre-charging failure signal, or feeds back the key power-off request, or feeds back the fast charging gun insertion signal, or feeds back the fast charging gun removal signal, or feeds back the slow charging gun removal signal, then the vehicle controller of the vehicle is controlled to enter the third target state, and in the third target state, when it is detected that the high-voltage total positive relay is cut off and the high-voltage total negative relay is closed, and when the high-voltage unloading is completed, the vehicle controller of the vehicle is controlled to enter the power-off saving state.

4. The method according to claim 3, wherein When the power on and off control strategy of the high-voltage system is the fourth strategy, performing high-voltage power on and off control on the high-voltage system according to the power on and off control strategy of the high-voltage system includes: controlling a vehicle controller of the vehicle to be in the first target sub-state of the first target state, and sending a seventh high-voltage closed connection command to the high-voltage system and the battery management system; When detecting that the pre-charging is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is disconnected, and the high-voltage main negative relay is closed, the vehicle controller of the vehicle is controlled to enter the second target state and send an eighth high-voltage close connection command to the high-voltage system; When it is detected that the high-voltage main positive relay is disconnected or the high-voltage main negative relay is disconnected, the vehicle controller of the vehicle is controlled to enter a third target state and send a fourth high-voltage disconnect command to the high-voltage system; When the vehicle controller of the vehicle is in any target sub-state of the first target state, if the slow charge ignition signal is detected, the high voltage power on and off of the high voltage system is controlled based on the second strategy; if the key ignition signal is detected, the high voltage power on and off of the high voltage system is controlled based on the third strategy; If the high-voltage connection prohibition fault is detected or the battery management system feeds back the pre-charging failure signal, or feeds back the remote high-voltage power-off request, or feeds back the fast-charging gun insertion signal, or feeds back the fast-charging gun removal signal, or feeds back the slow-charging gun removal signal, then the vehicle controller of the vehicle is controlled to enter the third target state, and in the third target state, when it is detected that the high-voltage total positive relay is cut off and the high-voltage total negative relay is closed, and when the high-voltage unloading is completed, the vehicle controller of the vehicle is controlled to enter the power-off saving state.

5. The method according to any one of claims 2-4, characterized in that, The vehicle controller controlling the vehicle enters a power-off saving state, including: A fifth high-voltage disconnect command is sent to the high-voltage system, and when it is detected that the key is powered on again, or remote high-voltage power is requested again, or DC charging is restarted, or AC charging is restarted, the vehicle controller of the vehicle is controlled to enter the initialization mode.

6. A vehicle high-voltage power-on and power-off control device, characterized in that, include: An acquisition module is used to collect the vehicle's DC charging ignition signal, the current status of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; A matching module, configured to match the power-on and power-off control strategy of the high-voltage system according to the DC charging ignition signal, the current state of the battery management system, the AC charging ignition signal, the key ignition signal, and the remote high-voltage connection request signal; And A control module, configured to perform high-voltage power-on and power-off control on the high-voltage system according to the power-on and power-off control strategy of the high-voltage system, The matching module includes: if the DC charging ignition signal is collected and the current state of the battery management system is the charging state or the heating state, the power-on and power-off control strategy of the high-voltage system is the first strategy; if the AC charging ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the second strategy; if the key ignition signal is collected, the power-on and power-off control strategy of the high-voltage system is the third strategy; if the remote high-voltage connection request signal is collected, the power-on and power-off control strategy of the high-voltage system is the fourth strategy; The control module includes: controlling the vehicle's vehicle controller to be in a first target sub-state under a first target state, and sending a first high-voltage closing connection command to the high-voltage system and the battery management system; when it is detected that the pre-charging of the battery management system is successful, the high-voltage main positive relay is closed, the high-voltage pre-charging relay is open, and the high-voltage main negative relay is closed, controlling the vehicle's vehicle controller to enter a second target state and sending a second high-voltage closing connection command to the high-voltage system; when it is detected that the high-voltage main positive relay is open or the high-voltage main negative relay is open, controlling the vehicle's vehicle controller to enter a third target state and sending a first high-voltage disconnecting connection command to the high-voltage system; when the vehicle's vehicle controller is in any target sub-state under the first target state, if it is detected that there is a prohibited high-voltage connection fault, or the pre-charging failure issued by the battery management system, or the DC charging power-off request, or the fast charging gun is pulled out, controlling the vehicle's vehicle controller to enter the third target state; after the high-voltage system enters the third target state, if it is detected that the high-voltage main positive relay is cut off and the high-voltage main negative relay is closed, and the high-voltage unloading is completed, controlling the vehicle's vehicle controller to enter the power-off save state; Wherein, the first target state is the HVcnnt state, the first target sub-state is the Prechg state, the second target state is the Cnnted state, the third target state is the HVDisCnn state, and the power-off save state is the AfterRun state.

7. A vehicle, characterized in that, Including: A memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor executes the program to implement the vehicle high-voltage power-on and power-off control method according to any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to be used to implement the vehicle high-voltage power-on and power-off control method according to any one of claims 1-5.

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