High-voltage power-on management method and system for power battery of electric vehicle and storage medium

Abstract

The invention discloses a high-voltage power-on management method for a power battery of an electric vehicle, which comprises the following steps: inputting a power-on signal, and judging the effectiveness of the signal; judging that the current vehicle power-on state of the vehicle is the power-on state under the normal driving condition, the power-on state under the slow charging condition or the power-on state under the quick charging condition; and executing a preset corresponding power-on process according to the power-on state. According to the high-voltage power-on management method for the power battery of the electric vehicle, all parts of the whole vehicle system are coordinated through signal collection of the whole vehicle controller, so that all the parts are reasonably and sequentially connected or disconnected with the low-voltage control power and the high-voltage power battery, the vehicle can correctly complete'starting 'and'closing' actions, and information interaction and fault detection are carried out. The whole process must ensure correct logic and sequence, and fault detection is reasonable and effective.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile safety control, in particular to the technical field of high-voltage power-on management of power battery based on pure electric vehicles. BACKGROUND

[0002] With the current vigorous promotion of new energy vehicles by the country, the market share of new energy vehicles is also gradually increasing. The main feature of new energy vehicles is the difference in power source compared with traditional vehicles, so the management of power battery is also the research direction in the industry, and the high-voltage power-on process of power battery also needs to be handled safely and reliably. There are many kinds of safety methods for high-voltage power-on of electric vehicles at present, but most of them use limit setting power-on conditions to ensure the safety of high-voltage power-on of power battery of electric vehicles. For example, the publication number of the granted patent is CN105196883B, the granted publication date is February 23, 2018, and the patent name is "High-voltage power-on control method of multi-box power battery box". The disclosed high-voltage power-on control method comprises: step S1, after receiving the high-voltage power-on command from the vehicle controller, the battery management system BMS judges whether the high-voltage power-on condition is met, and if so, the total positive relay is controlled to be closed; step S2, the BMS controls the intermediate relay to be closed, so that the high-voltage connection between different battery boxes is connected, and the pre-charging is started; step S3, after the pre-charging is completed, the BMS controls the total positive relay to be closed.

[0003] The safety conditions of similar high-voltage power-on process settings of power battery are generally simple and less, that is, the alarm and power-off operation are only performed in the case of having a great influence on vehicle safety, and there is a lack of a more comprehensive and reliable power-on control method and system for the increasingly complex electric vehicles. SUMMARY

[0004] The technical problem to be solved by the present application is to realize a comprehensive and reliable power-on management method and system, which can reasonably sequence the connection or disconnection of low-voltage control power and high-voltage power battery.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is an electric vehicle power battery high-voltage power-on management method:

[0006] Step 1, input the power-on signal and judge the signal effectiveness;

[0007] Step 2, judge the current vehicle power-on mode of the vehicle, and the vehicle power-on mode includes power-on in normal driving condition, power-on in slow charging condition, and power-on in fast charging condition;

[0008] Step 3, execute the preset corresponding power-on process according to the determined vehicle power-on mode.

[0009] In step 1, the fast charging connection confirmation signal, the slow charging connection confirmation signal, the slow charging wake-up signal and the ON wake-up signal are subjected to average filtering, and then signal validity is judged to obtain valid signals.

[0010] In step 2:

[0011] When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is invalid, power-on in the normal driving condition is adopted.

[0012] When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, power-on in the fast charging condition is adopted.

[0013] When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, power-on in the fast charging condition is adopted.

[0014] When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, power-on in the slow charging condition is adopted.

[0015] When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, power-on in the slow charging condition is adopted.

[0016] In step 2:

[0017] When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, it is determined that the operation is abnormal.

[0018] When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, it is determined that the operation is abnormal.

[0019] When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is valid, it is determined that the operation is abnormal.

[0020] When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is invalid, it is determined that the slow charging is abnormal.

[0021] When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is invalid, it is determined that the slow charging is abnormal.

[0022] When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is valid, it is determined that the slow charging is abnormal.

[0023] When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the slow charging connection confirmation signal is valid, and the slow charging connection confirmation signal is valid, the slow charging is determined to be abnormal.

[0024] If the ON wake-up signal is invalid, the fast charging connection confirmation signal is invalid, the slow charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, the vehicle is determined to be parked.

[0025] If the ON wake-up signal is invalid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is valid, or the slow charging connection confirmation signal is invalid, the system is considered to be parked.

[0026] The power-on process under normal driving conditions includes the following steps:

[0027] The power-on strategy under operating conditions is to enter the new energy low-voltage power supply state in the operating mode, close the low-voltage power supply relay, and enter the new energy low-voltage self-test state.

[0028] In the low-voltage self-test state of the new energy vehicle, the positive relay sticking fault is detected. If no fault is detected, the vehicle enters the high-voltage negative closing state. If a fault exists, or the vehicle mode is parked, normal slow charging, or normal fast charging, the vehicle enters the high-voltage power failure detection state.

[0029] In the battery high voltage negative closed state, the battery negative relay is closed, and after waiting for a set time, the battery high voltage detection state is entered. If a fault occurs or the vehicle mode is not running, the battery high voltage negative open state is entered.

[0030] In the battery high voltage detection state, the battery positive relay sticking fault is detected; if no fault is detected, the high voltage system pre-charging state is entered; if a fault exists, or the vehicle mode is not running, or a certain time is exceeded, the battery high voltage negative disconnection state is entered.

[0031] If there is no fault in the high-voltage system pre-charging state, it enters the high-voltage system detection; if there is a fault in the process, or the vehicle mode is not running, or the calibrated time is exceeded, it enters the battery high-voltage positive disconnection state.

[0032] In driving mode, the vehicle gear fault is checked. If there is no fault and the gear signal is N, the vehicle Ready flag is 1, the DC-DC is enabled, the MCU is enabled, the air conditioning and heating system is allowed to work, and the fan is allowed to work. If a fault occurs during the process, or the vehicle mode is not running, it enters the zero power state.

[0033] The entire vehicle is brought under high voltage.

[0034] The power-on process under slow charging conditions includes the following steps:

[0035] Entering the new energy low-voltage power supply mode, the low-voltage power supply relay is closed, and the new energy low-voltage self-test mode is entered.

[0036] In the low-voltage self-test state of the new energy vehicle, the positive relay sticking fault is detected. If the test is passed, the vehicle enters the high-voltage negative closing state. If a fault exists, or the vehicle mode is parked or fast charging, the vehicle enters the high-voltage power failure detection state.

[0037] In the battery high voltage negative closed state, the battery negative relay is closed, and after waiting for the calibrated time, the battery high voltage detection state is entered. If a fault occurs or the vehicle mode is stopped, the battery high voltage negative open state is entered.

[0038] In the battery high voltage detection state, the battery positive relay sticking fault is detected; if no fault is detected, the high voltage system pre-charging state is entered; if a fault exists, or the vehicle mode is parked, or the calibrated time is exceeded, the battery high voltage negative disconnection state is entered.

[0039] If there is no fault in the high-voltage system pre-charging state, it enters the high-voltage system detection; if there is a fault in the process, or the vehicle mode is stopped, or the calibrated time is exceeded, it enters the battery high-voltage positive disconnection state.

[0040] During high-voltage system testing, the high-voltage power-on completion flag is set to 1, each system performs high-voltage testing, and enters slow charging mode; if the fault in Appendix 4 occurs during the process, or the vehicle mode is parked and enters battery high-voltage positive disconnection;

[0041] In slow charging mode, DC-DC is enabled, the air conditioning heating system is allowed to work, and the fan is allowed to work. If charging is completed during the process and there is no need for air conditioning or PTC, or a malfunction occurs, or the vehicle mode is not slow charging or slow charging is abnormal, then it will enter the slow charging completed state.

[0042] The vehicle enters a high-voltage state.

[0043] Powering on during fast charging includes the following steps:

[0044] When entering fast charging, the new energy low-voltage power supply state is activated, the low-voltage power supply relay is closed, and the new energy low-voltage self-test state is entered.

[0045] In the low-voltage self-test state of new energy vehicles, the positive relay sticking fault is detected. If the test is passed, the fast charging relay is closed. If a fault exists, or the vehicle mode is parked or normal slow charging, the high-voltage power failure detection state is entered.

[0046] When the fast charging relay is closed, the battery enters a high-voltage negative closed state.

[0047] In the battery high voltage negative closed state, the battery negative relay is closed to enter the battery high voltage detection state. If a fault occurs or the vehicle mode is stopped, the battery high voltage negative open state will be entered.

[0048] In the battery high voltage detection state, the battery positive relay sticking fault is detected; if no fault is detected, it enters the high voltage system pre-charging state; if a fault exists, or the vehicle mode is parked, or the calibrated time is exceeded, it enters the battery high voltage negative disconnect state.

[0049] If there is no fault in the high-voltage system pre-charging state, it enters the high-voltage system detection; if there is a fault in the process, or the vehicle mode is stopped, or the calibrated time is exceeded, it enters the battery high-voltage positive disconnection state.

[0050] During high-voltage system testing, the high-voltage power-on completion flag is set to 1, and each system performs high-voltage testing and enters fast charging mode; if a fault occurs during the process, or the vehicle is in parked mode, the battery high-voltage positive disconnection will occur.

[0051] In fast charging mode, DC-DC is enabled, the air conditioning and heating system is allowed to work, and the fan is allowed to work. If charging is completed during the process and there is no need for air conditioning or PTC, or if the vehicle mode is not fast charging or slow charging is abnormal, it will enter the fast charging end state.

[0052] The high-voltage electrical connection to the entire vehicle is now complete.

[0053] The electric vehicle power battery high-voltage power-on management system includes a vehicle controller that connects to and interacts with the BMS and MCU. The vehicle controller connects to the CAN bus to obtain vehicle status information and connects to and outputs control signals to the electrodes, instruments, EPS, AC air conditioning, PTC, DC-DC converter, and charger. The vehicle controller executes the electric vehicle power battery high-voltage power-on management method.

[0054] The vehicle controller has four hard-wired inputs, including fast charging connection signal, slow charging connection signal, slow charging wake-up signal, and ON wake-up signal; the vehicle controller collects key gear position wake-up signal, fast and slow charging wake-up signal, slow charging signal connection signal, fast charging signal connection signal, battery status and fault, motor status and fault, gear position signal, and vehicle speed signal.

[0055] A storage medium, wherein the storage medium is a computer-readable storage medium for storing software program code for executing the electric vehicle power battery high-voltage power-on management method.

[0056] This invention provides a high-voltage power-on management method for electric vehicle power batteries. Through signal acquisition by the vehicle controller, it coordinates various components of the vehicle system, ensuring that each component sequentially connects or disconnects the low-voltage control power and the high-voltage power battery. This enables the vehicle to correctly complete "start" and "stop" actions, and facilitates information exchange and fault detection. The entire process must guarantee logical correctness, correct sequence, and reasonable and effective fault detection. Attached Figure Description

[0057] The following is a brief explanation of the content represented by each figure in this specification:

[0058] Figure 1 This is a schematic diagram illustrating the functional division of the high-voltage strategy in the model.

[0059] Figure 2 A block diagram illustrating the high-voltage power management principle of electric vehicle power batteries. Detailed Implementation

[0060] The following description, with reference to the accompanying drawings, details the specific implementation of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods, to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0061] The electric vehicle power battery high-voltage power-on management system is based on a model-developed vehicle control system architecture. It defines modules related to high-voltage power-on within this architecture, coordinating the vehicle's power-on / power-off control functions across all vehicle control units, such as... Figure 2 As shown, the core control component is the vehicle controller, which connects to and coordinates the following components, including the motor controller MCU, battery management system BMS, electric power steering system EPS, air conditioning AC, PTC, DC-DC, instrument panel, charger, etc., to achieve the purpose of high-voltage power supply to the vehicle.

[0062] The vehicle controller collects key position wake-up signals, fast and slow charging wake-up signals, slow charging connection signals, fast charging connection signals, battery status and faults, motor status and faults, gear position signals, vehicle speed signals, etc., to determine the vehicle mode, control the power-on and power-off of other controllers, complete the high voltage power-on and power-off, and output the vehicle state status and high and low voltage component operation permission flags to other controllers so that other controllers can complete the corresponding work as required.

[0063] The vehicle controller contains a storage medium, which is a computer-readable storage medium used to store software program code. This software program code is used to execute the high-voltage power-on management method for the electric vehicle's power battery.

[0064] The high-voltage power-on management method for electric vehicle power batteries defines the power-on process under different operating conditions, such as the power-on process under normal driving conditions, slow charging conditions, and fast charging conditions. Since the requirements of the vehicle on the power battery are different under each operating condition, the high-voltage power-on process will also be different.

[0065] like Figure 1 As shown, the high-voltage strategy is functionally divided in the model. The high-voltage module has four hard-wired signal inputs. Each input signal is averaged and filtered eight times before the signal validity is determined.

[0066] in:

[0067] Fast charging connection confirmed, <1V (low active).

[0068] Slow charging connection confirmed, <1V (low active).

[0069] Slow charging wake-up function, >5V (high effective voltage);

[0070] ON wake-up signal, >5V (active high)

[0071] Vehicle mode determination: After the vehicle controller is powered on, the vehicle mode variables are determined. The specific determination method is as follows:

[0072]

[0073] I. Under vehicle operating conditions, the high-voltage power supply strategy is as follows:

[0074] 1. Power-on strategy under operating conditions: Enter the new energy low-voltage power supply state in the operating mode, close the low-voltage power supply relay, and enter the new energy low-voltage self-test state;

[0075] 2. In the low-voltage self-test state of the new energy vehicle, a positive relay sticking fault detection is performed. If no fault is detected, the vehicle enters the high-voltage negative closing state. If a fault exists, or if the vehicle mode is parked, normal slow charging, or normal fast charging, the vehicle enters the high-voltage power failure detection state.

[0076] 3. In the battery high voltage negative closed state, close the battery negative relay and wait for a certain period of time to enter the battery high voltage detection state. If a preset fault occurs (pre-organized according to possible faults, and the test is performed to determine whether a certain fault is met through data matching; if so, there is a fault; otherwise, there is no fault) or the vehicle mode is not running, then enter the battery high voltage negative open state.

[0077] 4. In the battery high-voltage detection state, perform a battery positive relay sticking fault detection. If no fault is detected, enter the high-voltage system pre-charging state. If a fault exists, or the vehicle mode is not running, or a certain time is exceeded, enter the battery high-voltage negative disconnect state.

[0078] 5. If there is no fault in the high-voltage system pre-charging state, proceed to high-voltage system testing. If a fault occurs during the process, or the vehicle is not in operating mode, or the calibrated time is exceeded, proceed to battery high-voltage positive disconnection.

[0079] 6. In driving mode, determine the vehicle gear fault. If there is no fault and the gear signal is N, the vehicle Ready flag is 1, DC-DC is enabled, MCU is enabled, the air conditioning and heating system is allowed to work, and the fan is allowed to work. If a fault occurs during the process, or the vehicle mode is not running, it will enter the zero power state.

[0080] 7. The entire vehicle is brought to a high-voltage state.

[0081] II. Under slow charging conditions, the high-voltage power supply strategy is as follows:

[0082] 1. Enter the operation mode of new energy low-voltage power supply, close the low-voltage power supply relay, and enter the new energy low-voltage self-test state;

[0083] 2. In the low-voltage self-test state of the new energy vehicle, a positive relay sticking fault detection is performed. If the detection passes, the vehicle enters the high-voltage negative closing state. If a fault exists, or if the vehicle mode is parked or fast charging, the vehicle enters the high-voltage power failure detection state.

[0084] 3. In the battery high voltage negative closed state, close the battery negative relay, wait for the calibrated time, and then enter the battery high voltage detection state. If a fault occurs or the vehicle mode is stopped, then enter the battery high voltage negative open state.

[0085] 4. In the battery high-voltage detection state, perform a battery positive relay sticking fault detection. If no fault is detected, enter the high-voltage system pre-charging state. If a fault exists, or the vehicle mode is parked, or the calibrated time has been exceeded, enter the battery high-voltage negative disconnect state.

[0086] 5. If there is no fault in the high-voltage system pre-charging state, proceed to high-voltage system testing. If a fault occurs during the process, or the vehicle is in park mode, or the calibrated time is exceeded, proceed to battery high-voltage positive disconnection.

[0087] 6. During high-voltage system testing, the high-voltage power-on completion flag is set to 1, and each system performs high-voltage testing and enters slow charging mode. If a preset fault occurs during the process (pre-organized based on possible faults, and during testing, data matching is used to determine whether a fault is met; if so, a fault exists; otherwise, no fault exists), or the vehicle mode is parked and enters the battery high-voltage positive disconnection (120).

[0088] 7. During slow charging, DC-DC is enabled, the air conditioning and heating system is allowed to work, and the fan is allowed to work. If charging is completed during the process and there is no need for air conditioning or PTC, or if a malfunction occurs, or if the vehicle mode is not slow charging or slow charging is abnormal, then the slow charging is completed.

[0089] 8. The vehicle enters the high-voltage state.

[0090] III. Under fast charging conditions, the high-voltage power supply strategy is as follows:

[0091] 1. When entering fast charging, the new energy low-voltage power supply state closes the low-voltage power supply relay and enters the new energy low-voltage self-test state;

[0092] 2. In the low-voltage self-test state of the new energy vehicle, a positive relay sticking fault detection is performed. If the detection passes, the fast charging relay will be closed. If a fault exists, or the vehicle mode is parked or normal slow charging, the high-voltage power failure detection state will be entered.

[0093] 3. When the fast charging relay is closed, the battery enters the high-voltage negative closed state.

[0094] 4. When the battery high voltage negative terminal is closed, close the battery negative terminal relay to enter the battery high voltage detection state. If a fault occurs or the vehicle mode is stopped, it will enter the battery high voltage negative terminal disconnect state.

[0095] 5. During battery high-voltage detection, a battery positive relay sticking fault is detected. If no fault is detected, the system enters the high-voltage system pre-charging state. If a fault exists, or the vehicle is in park mode, or the calibrated time has been exceeded, the system enters the battery high-voltage negative disconnection state.

[0096] 6. If there is no fault in the high-voltage system pre-charging state, proceed to high-voltage system testing. If a fault occurs during the process, or the vehicle is in park mode, or the calibrated time is exceeded, proceed to battery high-voltage positive disconnection.

[0097] 7. During high-voltage system testing, the high-voltage power-on completion flag will be set to 1, and each system will undergo high-voltage testing, entering fast charging mode. If a fault occurs during the process, or if the vehicle is in parked mode, the battery high-voltage positive disconnection will occur.

[0098] 8. In fast charging mode, DC-DC is enabled, the air conditioning and heating system is allowed to work, and the fan is allowed to work. If charging is completed during the process and there is no need for air conditioning or PTC, or if the vehicle mode is not fast charging or slow charging is abnormal, it will enter the fast charging end state.

[0099] 9. The high-voltage electrical connection to the entire vehicle is complete.

[0100] In this invention, the above-mentioned high-voltage electric strategy and its parameters can be appropriately adjusted according to different vehicle models or electrical architectures.

[0101] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A high-voltage power-on management method for electric vehicle power batteries, characterized by: Step 1: Input the power-on signal and perform signal validity judgment. Step 2: Determine the current vehicle power-on mode of the vehicle, including power-on in normal driving conditions, power-on in slow charging conditions, and power-on in fast charging conditions. Step 3: Execute the pre-set corresponding power-on process according to the determined vehicle power-on mode.

2. The electric vehicle traction battery high voltage power-up management method of claim 1, wherein: In Step 1, after averaging and filtering the fast charging connection confirmation signal, slow charging connection confirmation signal, slow charging wake-up signal, and ON wake-up signal, perform signal validity judgment to obtain valid signals.

3. The electric vehicle traction battery high voltage power-up management method of claim 1 or 2, characterized by: In Step 2: When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the slow charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is invalid, use the power-on in normal driving conditions. When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, use the power-on in fast charging conditions. When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, use the power-on in fast charging conditions. When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, use the power-on in slow charging conditions. When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, use the power-on in slow charging conditions.

4. The electric vehicle battery high voltage power-up management method of claim 3, wherein: In Step 2: When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, determine that it is a running exception. When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, determine that it is a running exception. When the ON wake-up signal is valid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is valid, determine that it is a running exception. When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is invalid, determine that it is a slow charging exception. When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is invalid, determine that it is a slow charging exception. When the ON wake-up signal is invalid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is valid, determine that it is a slow charging exception. When the ON wake-up signal is valid, the fast charging connection confirmation signal is valid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is valid, determine that it is a slow charging exception. When the ON wake-up signal is invalid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is invalid, and the slow charging connection confirmation signal is valid, determine that it is a stop. When the ON wake-up signal is invalid, the fast charging connection confirmation signal is invalid, the fast charging connection confirmation signal is valid, and the slow charging connection confirmation signal is invalid, determine that it is a stop.

5. The electric vehicle traction battery high voltage power-up management method of claim 1 or 4, wherein: The power-on in normal driving conditions includes the following steps: The power-on strategy in the running condition enters a new energy low-voltage power supply state in the running mode, closes a low-voltage power supply relay, and enters a new energy low-voltage self-checking state; In the new energy low-voltage self-checking state, positive electrode relay sticking fault detection is performed, and if no fault is detected, a battery high-voltage negative closing state is entered; if a fault exists or the vehicle mode is parking, normal slow charging or normal fast charging, a high-voltage power-off detection state is entered; In the battery high-voltage negative closing state, the battery negative electrode relay is closed, and after waiting for a set time, a battery high-voltage detection state is entered, and if a fault occurs or the vehicle mode is not running, a battery high-voltage negative opening state is entered; In the battery high-voltage detection state, battery positive electrode relay sticking fault detection is performed; if no fault is detected, a high-voltage system pre-charging state is entered; if a fault exists, the vehicle mode is not running or a certain time is exceeded, a battery high-voltage negative opening state is entered; In the high-voltage system pre-charging state, if no fault exists, a high-voltage system detection is entered; if a fault exists in the process, the vehicle mode is not running or a calibration time is exceeded, a battery high-voltage positive opening is entered; In the driving state, the vehicle gear fault is judged, if no fault exists and the gear signal is N, the vehicle Ready flag is 1, the DCDC is enabled, the MCU is enabled, the air conditioning heating system is allowed to work, and the fan is allowed to work, if a fault occurs in the process or the vehicle mode is not running, a zero power state is entered; The vehicle enters a high-voltage state.

6. The electric vehicle battery high voltage power-up management method of claim 1 or 4, wherein: The power-on in the slow charging condition includes the following steps: Enter a new energy low-voltage power supply state in the running mode, close a low-voltage power supply relay, and enter a new energy low-voltage self-checking state; In the new energy low-voltage self-checking state, positive electrode relay sticking fault detection is performed, and if no fault is detected, a battery high-voltage negative closing state is entered; if a fault exists or the vehicle mode is parking or fast charging, a high-voltage power-off detection state is entered; In the battery high-voltage negative closing state, the battery negative electrode relay is closed, and after waiting for a set time, a battery high-voltage detection state is entered, and if a fault occurs or the vehicle mode is not running, a battery high-voltage negative opening state is entered; In the battery high-voltage detection state, battery positive electrode relay sticking fault detection is performed; if no fault is detected, a high-voltage system pre-charging state is entered; if a fault exists, the vehicle mode is not running or a certain time is exceeded, a battery high-voltage negative opening state is entered; In the high-voltage system pre-charging state, if no fault exists, a high-voltage system detection is entered; if a fault exists in the process, the vehicle mode is not running or a calibration time is exceeded, a battery high-voltage positive opening is entered; In the high-voltage system detection, the high-voltage power-on completion flag is 1, each system is detected, and a slow charging state is entered; if a fault occurs in the process or the vehicle mode is parking, a battery high-voltage positive opening is entered; In the slow charging state, the DCDC is enabled, the air conditioning heating system is allowed to work, and the fan is allowed to work, if the charging is completed in the process and there is no air conditioning or PTC demand, or a fault occurs, or the vehicle mode is not slow charging or slow charging is abnormal, a slow charging completion state is entered; The vehicle enters a high-voltage state.

7. The electric vehicle battery high voltage power-up management method of claim 1 or 4, wherein: The power-on in the fast charging condition includes the following steps: When entering fast charging, the new energy low-voltage power supply state is entered, the low-voltage power supply relay is closed, and the new energy low-voltage self-checking state is entered; In the new energy low-voltage self-checking state, the positive electrode relay sticking fault detection is performed, and if the detection is passed, the fast charging relay closing state is entered; if there is a fault, or the vehicle mode is parking or normal slow charging, the high-voltage power-off detection state is entered; In the fast charging relay closing state, the fast charging relay is closed; the battery high-voltage negative closing state is entered; In the battery high-voltage negative closing state, the battery negative electrode relay is closed, and the battery high-voltage detection state is entered; if there is a fault or the vehicle mode is parking, the battery high-voltage negative opening state is entered; In the battery high-voltage detection state, the battery positive electrode relay sticking fault detection is performed; if there is no fault, the high-voltage system pre-charging state is entered; if there is a fault, or the vehicle mode is parking, or the calibration time is exceeded, the battery high-voltage positive opening state is entered; In the high-voltage system pre-charging state, if there is no fault, the high-voltage system detection is entered; if there is a fault in the process, or the vehicle mode is parking, or the calibration time is exceeded, the battery high-voltage positive opening state is entered; In the high-voltage system detection, the high-voltage power-on completion flag position is 1, each system performs high-voltage detection, and the fast charging state is entered; if there is a fault in the process, or the vehicle mode is parking, the battery high-voltage positive opening state is entered; In the fast charging state, the DCDC is enabled, the air conditioning heating system is allowed to work, and the fan is allowed to work; if the charging is completed in the process and there is no air conditioning or PTC demand, or the vehicle mode is not fast charging or slow charging exception, the fast charging end state is entered; The high-voltage power-on of the vehicle is completed.

8. A high voltage power-up management system for an electric vehicle traction battery, characterized by: The system is provided with a vehicle controller, the vehicle controller is connected with and interacts with the BMS and the MCU, the vehicle controller is connected with a CAN bus to obtain vehicle state information, the vehicle controller is connected with and outputs control signals to electrodes, instruments, EPS, air conditioners AC, PTC, DCDC, and charging machines, and the vehicle controller executes the high-voltage power-on management method of the electric vehicle power battery as claimed in any one of claims 1-7.

9. The electric vehicle battery high voltage power-up management system of claim 8, wherein: The vehicle controller is provided with four-way hard-wire input, including fast charging connection signal, slow charging connection signal, slow charging wake-up signal, and ON wake-up signal; the vehicle controller collects key gear wake-up signal, fast and slow charging wake-up signal, slow charging signal connection signal, fast charging signal connection signal, battery state and fault, motor state and fault, gear signal, and vehicle speed signal.

10. A storage medium, the storage medium being a computer-readable storage medium for storing a software program code, characterized in that: The software program code is used to execute the high-voltage power-on management method of the electric vehicle power battery as claimed in any one of claims 1-7. The software program code is used to execute the high-voltage power-on management method of the electric vehicle power battery as claimed in any one of claims 1-7.

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