Method for Preventing False Alarm of Relay Adhesion Fault, Battery Management System and Vehicle

Abstract

The present invention provides a method, a battery management system and a vehicle for preventing false alarms of relay adhesion faults. The method is applied to the battery management system of an automobile, and the battery management system includes a delay module. The method includes: if a first gun insertion signal of a charging gun is obtained, inputting the first gun insertion signal into the delay module to enter a delay mode; determining an output signal of the delay module based on a preset calibration value in the delay module; determining whether to exit the delay mode based on the output signal, and performing relay adhesion detection after exiting the delay mode. The present invention can improve the problem of false alarms of relay adhesion faults caused by users quickly unplugging and plugging the gun.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a method for preventing misreporting of relay adhesion faults, a battery management system, and a vehicle. Background Art

[0002] Currently, with the substantial increase in the penetration rate of new energy vehicles, the charging problem of vehicles has become increasingly prominent. During the charging process, due to unfamiliarity with the operation of the charging gun, users may repeatedly plug and unplug the charging gun to confirm whether the charging gun is properly plugged in. However, in the case of multiple rapid unplugging and plugging of the gun within a short period of time, since the discharge of the vehicle's capacitance is not completed, closing the relay again will cause the Battery Management System (BMS) to misreport the relay adhesion fault, resulting in charging failure and poor user experience. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method for preventing misreporting of relay adhesion faults, a battery management system, and a vehicle, which can improve the problem of misreporting of relay adhesion faults caused by users' rapid unplugging and plugging of the gun.

[0004] To achieve the above purpose, the technical solutions adopted in the embodiments of the present invention are as follows:

[0005] In a first aspect, an embodiment of the present invention provides a method for preventing misreporting of relay adhesion faults. This method is applied to the battery management system of a vehicle, and the battery management system includes a delay module. The method includes: if a first gun-insertion signal of the charging gun is obtained, input the first gun-insertion signal into the delay module to enter the delay mode; determine the output signal of the delay module based on the preset calibration quantity in the delay module; determine whether to exit the delay mode based on the output signal, and perform relay adhesion detection after exiting the delay mode.

[0006] In one implementation, determining the output signal of the delay module based on the preset calibration quantity in the delay module includes: obtaining the initial value of the calibration quantity; updating the calibration quantity based on the initial value of the calibration quantity and the preset step size to obtain the current value of the calibration quantity; determining the output signal of the delay module based on the current value of the calibration quantity.

[0007] In one implementation, determining the output signal of the delay module based on the current value of the calibration quantity includes: determining whether the current value of the calibration quantity is zero; if the current value of the calibration quantity is zero, determining the output signal of the delay module as a first value; if the current value of the calibration quantity is not zero, determining the output signal of the delay module as a second value.

[0008] In one embodiment, determining whether to exit the delay mode based on the output signal includes: if the output signal of the delay module is a first value, then exit the delay mode; if the output signal of the delay module is a second value, then do not exit the delay mode and continue to update the calibrated quantity.

[0009] In one embodiment, after determining whether the current value of the calibrated quantity is zero, it further includes: if the current value of the calibrated quantity is not zero and the second plug-in signal of the charging gun is obtained, then input the second plug-in signal into the delay module; reset the current value of the calibrated quantity to the initial value, and update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size.

[0010] In one embodiment, updating the calibrated quantity based on the initial value of the calibrated quantity and the preset step size includes: updating the calibrated quantity according to the following formula:

[0011] K = K - a

[0012] where K is the calibrated quantity and a is the preset step size.

[0013] In a second aspect, an embodiment of the present invention provides a battery management system, including: a signal acquisition module, configured to, if the first plug-in signal of the charging gun is obtained, input the first plug-in signal into the delay module to enter the delay mode; a delay module, configured to determine an output signal based on a preset calibrated quantity; a detection module, configured to determine whether to exit the delay mode based on the output signal and perform relay adhesion detection after exiting the delay mode.

[0014] In one embodiment, the delay module is further configured to: obtain the initial value of the calibrated quantity; update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size to obtain the current value of the calibrated quantity; determine the output signal of the delay module based on the current value of the calibrated quantity.

[0015] In a third aspect, an embodiment of the present invention provides a vehicle, including a processor and a memory, where the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the steps of the method according to any one of the first aspect provided above.

[0016] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is run by a processor, it executes the steps of the method according to any one of the first aspect provided above.

[0017] The embodiments of the present invention bring the following beneficial effects:

[0018] The method, battery management system, and vehicle for preventing false alarms of relay adhesion faults provided by the embodiments of the present invention. This method is applied to the battery management system of an automobile, and the battery management system includes a delay module. First, if a first gun insertion signal of a charging gun is obtained, the first gun insertion signal is input into the delay module to enter the delay mode. Then, based on the preset calibrated quantity in the delay module, the output signal of the delay module is determined. Finally, based on the output signal, it is judged whether to exit the delay mode, and relay adhesion detection is performed after exiting the delay mode. The above method detects the gun insertion signal of the charging gun. In the case where the user quickly pulls out and inserts the gun, the delay module can be used for delay, so that the voltage outside the relay is fully released, avoiding the problem of false alarms of relay adhesion faults during relay adhesion detection and improving the user experience.

[0019] Other features and advantages of the present invention will be described in the following description, and some of them will be obvious from the description or understood by implementing the present invention. The objectives and other advantages of the present invention are achieved and obtained by the structures specifically pointed out in the description, claims, and drawings.

[0020] To make the above objectives, features, and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a high-voltage architecture diagram for battery charging provided by the embodiments of the present invention;

[0023] Figure 2 It is a flowchart of a method for preventing false alarms of relay adhesion faults provided by the embodiments of the present invention;

[0024] Figure 3 It is a schematic diagram of the working principle of a delay module provided by the embodiments of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of a battery management system provided by the embodiments of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of a vehicle provided by the embodiments of the present invention. Detailed Embodiments

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0028] Refer to Figure 1 The high-voltage architecture diagram of a battery charging shown in the figure. The high-voltage main positive relay and the main negative relay are inside the battery pack. When charging through a fast charging pile or a slow charging pile, one path of current flows to the battery pack end, and one path of the circuit flows to the vehicle load end. After charging is completed and the charging gun is unplugged, the high-voltage main positive relay and the main negative relay are disconnected. At this time, the large capacitor at the vehicle load end needs to be discharged, and this time may last for 1 s or longer. If the user quickly unpluggs and replugs the gun at this time, the BMS will perform relay adhesion detection after the gun is plugged in. Specifically, the adhesion detection logics of the main positive relay, the main negative relay, the fast charging positive relay, and the fast charging negative relay are as follows. The outside of the main positive relay and the main negative relay is Figure 1 the right side of the main positive relay and the main negative relay shown in the figure, and the inside of the main positive relay and the main negative relay is Figure 1 the left side of the main positive relay and the main negative relay shown in the figure. The outside of the fast charging positive relay and the fast charging negative relay is Figure 1 the lower side of the fast charging positive relay and the fast charging negative relay shown in the figure, and the inside of the fast charging positive relay and the fast charging negative relay is Figure 1 the upper side of the fast charging positive relay and the fast charging negative relay shown in the figure:

[0029] (1) Main positive relay adhesion detection scheme: Voltage outside the main positive relay - Voltage inside the main positive relay < 5% * Voltage inside the main positive relay;

[0030] (2) Main negative relay adhesion detection scheme: Absolute value of the voltage difference between the inside and outside of the main negative relay < 5% * Voltage inside the main positive relay and DC link voltage > 50 V and lasting for N ms;

[0031] (3) Fast charging positive relay and fast charging negative relay adhesion detection scheme: Voltage outside the fast charging relay - Voltage inside the fast charging relay < 5% * Voltage inside the fast charging relay.

[0032] As can be seen from the above, in the case where the user quickly unpluggs and replugs the gun, due to the short time interval and the fact that the voltage outside the relay has not been quickly discharged completely, the BMS will detect high voltage outside the main positive relay and the main negative relay, misreport the relay adhesion fault, and cause inability to charge.

[0033] Currently, since users are not familiar with the operation of the charging gun during the charging process, they will repeatedly plug and unplug the charging gun to confirm whether the charging gun is plugged in place, which will cause the battery management system to falsely report a relay adhesion fault, resulting in charging failure and a poor user experience.

[0034] Based on this, a method, a battery management system, and a vehicle for preventing false reporting of relay adhesion faults provided by an embodiment of the present invention can improve the problem of false reporting of relay adhesion faults caused by users quickly unplugging and plugging the gun.

[0035] To facilitate the understanding of this embodiment, first, a method for preventing false reporting of relay adhesion faults disclosed in an embodiment of the present invention will be introduced in detail. This method is applied to the battery management system of an automobile, and the battery management system includes a delay module. See Figure 2 The flowchart of a method for preventing false reporting of relay adhesion faults shown in the figure schematically shows that the method mainly includes the following steps S201 to step S203:

[0036] Step S201: If a first gun insertion signal of the charging gun is obtained, the first gun insertion signal is input into the delay module to enter the delay mode.

[0037] In an implementation manner, during the process of inserting and unplugging the charging gun, the first gun insertion signal of the charging gun can be detected, and the obtained first gun insertion signal is input into the delay module to enter the delay mode, so that the voltage outside the relay can have enough time to be fully released, and charging cannot be performed in the delay mode.

[0038] Step S202: Based on the preset calibrated quantity in the delay module, determine the output signal of the delay module.

[0039] In an implementation manner, a calibrated quantity can be preset in the delay module. The size of the calibrated quantity is related to the delay duration and can be selected according to the actual situation. After obtaining the first gun insertion signal of the charging gun and entering the delay mode, the calibrated quantity can be attenuated and calculated at a certain step size, and the output signal is determined according to the size of the real-time calibrated quantity.

[0040] Step S203: Based on the output signal, determine whether to exit the delay mode, and perform relay adhesion detection after exiting the delay mode.

[0041] In an implementation manner, if the calibrated quantity decays to zero, it indicates that the delay ends. The delay module can output a charging permission signal and exit the delay mode to perform relay adhesion detection; if the calibrated quantity is not zero, it indicates that the BMS is still in the delay mode, and the above step S202 is repeated.

[0042] The method for preventing misreporting of relay adhesion faults provided by the embodiments of the present invention can detect the gun insertion signal of the charging gun. In the case where the user quickly pulls out and inserts the gun, the delay module can be used for delay so that the voltage outside the relay can be fully released, avoiding the problem of misreporting of relay adhesion faults during the relay adhesion detection and improving the user experience.

[0043] In one implementation, for the aforementioned step S202, that is, when determining the output signal of the delay module based on the calibrated quantity preset in the delay module, the following methods can be adopted, including but not limited to:

[0044] First, obtain the initial value of the calibrated quantity.

[0045] In specific implementation, the initial value of the calibrated quantity can be selected according to the actual situation and saved in the delay module. After entering the delay mode, the calibrated quantity can be assigned the initial value.

[0046] Then, update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size to obtain the current value of the calibrated quantity.

[0047] In one implementation, the calibrated quantity can be updated according to the following formula:

[0048] K = K - a

[0049] Where K is the calibrated quantity and a is the preset step size. Here, K can be 3000 and a can be 10.

[0050] Finally, determine the output signal of the delay module based on the current value of the calibrated quantity.

[0051] Specifically, when determining the output signal of the delay module, the following methods can be adopted, including but not limited to: judging whether the current value of the calibrated quantity is zero; if the current value of the calibrated quantity is zero, then determine the output signal of the delay module as the first value; if the current value of the calibrated quantity is not zero, then determine the output signal of the delay module as the second value.

[0052] In specific implementation, when the user pulls out the charging gun and the first gun insertion signal is obtained, at this time, the input value at the input end of the delay module is 1, and the delay module starts to execute K = K - a. During this process, if the current value K of the calibrated quantity is not equal to 0, then determine the output signal of the delay module as the second value, that is, charging is not allowed; when the delay module runs repeatedly for multiple times, if the current value K of the calibrated quantity is equal to 0, then determine the output signal of the delay module as the first value, that is, charging is allowed.

[0053] Further, when determining whether to exit the delay mode based on the output signal, the following methods can be adopted, including but not limited to: if the output signal of the delay module is the first value, the delay mode is exited; if the output signal of the delay module is the second value, the delay mode is not exited, and the calibrated quantity is continuously updated. In specific implementation, if the output signal of the delay module is the first value, it indicates that the delay ends, the delay mode is exited, and the user is allowed to insert the charging gun for charging; if the output signal of the delay module is the first value, it indicates that the delay does not end, the delay mode is not exited, and the calibrated quantity is continuously updated by running K = K - a.

[0054] Considering that the relay adhesion detection will be performed after the user inserts the charging gun. If the user quickly removes and then reinserts the charging gun, false alarms of relay adhesion faults may occur. To prevent this situation, if the second gun insertion signal of the charging gun is detected before the current value of the calibrated quantity reaches zero, the calibrated value is reset and the delay calculation starts again. Specifically, after determining whether the current value of the calibrated quantity is zero, the above method further includes: if the current value of the calibrated quantity is not zero and the second gun insertion signal of the charging gun is obtained, the second gun insertion signal is input into the delay module; the current value of the calibrated quantity is reset to the initial value, and the calibrated quantity is updated based on the initial value of the calibrated quantity and the preset step size.

[0055] In specific implementation, when the current value of the calibrated quantity is not zero and the second gun insertion signal of the charging gun (i.e., the user has inserted the gun) is detected, the calibrated quantity is reset to the initial value, and K = K - a is run again to update the calibrated quantity.

[0056] The above method provided by the embodiment of the present invention can, through the delay module, fully release the voltages outside the main positive relay, main negative relay, and fast charge relay in the case where the user quickly removes and reinserts the charging gun, and perform relay adhesion detection after the full release, so that false alarms will not occur during the adhesion detection.

[0057] In the BMS software control of the embodiment of the present invention, a delay module (Timer) is added. For ease of understanding, the embodiment of the present invention also provides a schematic diagram of the working principle of the delay module. See Figure 3 As shown, where A represents the gun insertion signal of the charging gun (A = 1 indicates that the user has inserted the gun, A = 0 indicates that the user has removed the gun), R represents the Timer reset signal (R = 0 indicates Timer reset), B represents the charge permission signal (B = 1 indicates charging is allowed, B = 0 indicates charging is not allowed), K represents the calibrated quantity of the Timer. In practical applications, the initial value of K can be assigned 3000, and dT represents the preset step size, which can be 10 ms.

[0058] When the user draws the charging gun, the gun-insertion signal of the charging gun is A = 0. At this time, the input value of the input terminal E of Timer is 1, and Timer starts to run with K = K - 10. Since K ≠ 0 at this time, the output value B of the output terminal Y of Timer is 0, and charging is not allowed. When Timer runs repeatedly with K = K - 10 until K = 0, the output value B of the output terminal Y of Timer is 1, and charging is allowed.

[0059] If the user performs a gun-insertion operation when K ≠ 0, at this time, the gun-insertion signal of the charging gun becomes A = 1, the input value of the input terminal R of Timer is 0, Timer is reset, K is reset to the initial value, and it runs again with K = K - 10 until K = 0, and then the delay ends and the relay adhesion detection is performed.

[0060] The method for preventing false alarms of relay adhesion faults provided by the embodiments of the present invention detects the gun-insertion signal of the charging gun and uses a delay module to fully release the voltage outside the relay in the case of the user quickly drawing and inserting the gun, avoiding the problem of false alarms of relay adhesion faults during relay adhesion detection and improving the user experience.

[0061] For the aforementioned method for preventing false alarms of relay adhesion faults, the embodiments of the present invention also provide a battery management system. Refer to Figure 4 the structural schematic diagram of a battery management system shown, which shows that the system mainly includes the following parts:

[0062] The signal acquisition module 401 is used to input the first gun-insertion signal into the delay module and enter the delay mode if the first gun-insertion signal of the charging gun is acquired.

[0063] The delay module 402 is used to determine the output signal based on a preset calibration quantity.

[0064] The detection module 403 is used to determine whether to exit the delay mode based on the output signal and perform relay adhesion detection after exiting the delay mode.

[0065] The battery management system provided by the embodiments of the present invention detects the gun-insertion signal of the charging gun and can perform delay through the delay module in the case of the user quickly drawing and inserting the gun, so as to fully release the voltage outside the relay, avoid the problem of false alarms of relay adhesion faults during relay adhesion detection, and improve the user experience.

[0066] In one implementation, the aforementioned delay module 402 is further used to: obtain the initial value of the calibration quantity; update the calibration quantity based on the initial value of the calibration quantity and a preset step size to obtain the current value of the calibration quantity; and determine the output signal of the delay module based on the current value of the calibration quantity.

[0067] In one embodiment, the above-mentioned delay module 402 is further configured to: determine whether the current value of the calibrated quantity is zero; if the current value of the calibrated quantity is zero, determine that the output signal of the delay module is the first value; if the current value of the calibrated quantity is not zero, determine that the output signal of the delay module is the second value.

[0068] In one embodiment, the above-mentioned detection module 403 is further configured to: if the output signal of the delay module is the first value, exit the delay mode; if the output signal of the delay module is the second value, do not exit the delay mode and continue to update the calibrated quantity.

[0069] In one embodiment, the above-mentioned delay module 402 is further configured to: if the current value of the calibrated quantity is not zero and the second gun-inserting signal of the charging gun is obtained, input the second gun-inserting signal into the delay module; reset the current value of the calibrated quantity to the initial value, and update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size.

[0070] In one embodiment, the above-mentioned delay module 402 is further configured to update the calibrated quantity according to the following formula:

[0071] K = K - a

[0072] Where K is the calibrated quantity and a is the preset step size.

[0073] It should be noted that for the system provided in the embodiments of the present invention, its implementation principle and the technical effects produced are the same as those of the foregoing method embodiments. For the sake of brief description, for the parts not mentioned in the system embodiments, reference may be made to the corresponding content in the foregoing method embodiments.

[0074] It should be noted that the specific values provided in the embodiments of the present invention are only exemplary and are not limited herein.

[0075] The embodiments of the present invention further provide a vehicle. Specifically, the vehicle includes a processor and a storage device; a computer program is stored on the storage device, and the computer program executes the method according to any one of the above embodiments when being run by the processor.

[0076] Figure 5 FIG. is a schematic structural diagram of a vehicle provided by an embodiment of the present invention. The vehicle 100 includes: a processor 50, a memory 51, a bus 52, and a communication interface 53. The processor 50, the communication interface 53, and the memory 51 are connected through the bus 52; the processor 50 is configured to execute an executable module stored in the memory 51, such as a computer program.

[0077] Among them, the memory 51 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which can be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. can be used.

[0078] The bus 52 can be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience of representation, Figure 5 only a bidirectional arrow is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0079] Among them, the memory 51 is used to store programs. After receiving the execution instruction, the processor 50 executes the programs. The methods executed by the devices defined by the flow processes disclosed in any of the embodiments of the foregoing embodiments of the present invention can be applied to the processor 50 or implemented by the processor 50.

[0080] The processor 50 may be an integrated circuit chip with signal processing capabilities. During implementation, the steps of the above method can be completed by the integrated logic circuit of the hardware in the processor 50 or instructions in software form. The above-mentioned processor 50 may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and combines its hardware to complete the steps of the above method.

[0081] The computer program product of the readable storage medium provided by the embodiments of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the method described in the foregoing method embodiments. For the specific implementation, reference can be made to the foregoing method embodiments and will not be elaborated herein.

[0082] When the above-mentioned functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs.

[0083] Finally, it should be noted that the above-mentioned embodiments are only specific implementation manners of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting it. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or perform equivalent replacements on some of the technical features; and these modifications, changes, or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for preventing misreporting of relay adhesion faults, characterized in that, The method is applied to the battery management system of an automobile, and the battery management system includes a delay module; the method includes: If a first gun insertion signal of a charging gun is obtained, input the first gun insertion signal into the delay module to enter the delay mode; Determine the output signal of the delay module based on the calibrated quantity preset in the delay module; Judge whether to exit the delay mode based on the output signal, and perform relay adhesion detection after exiting the delay mode.

2. The method according to claim 1, characterized in that Determine the output signal of the delay module based on the calibrated quantity preset in the delay module, including: Obtain the initial value of the calibrated quantity; Update the calibrated quantity based on the initial value of the calibrated quantity and a preset step size to obtain the current value of the calibrated quantity; Determine the output signal of the delay module based on the current value of the calibrated quantity.

3. The method according to claim 2, wherein Determine the output signal of the delay module based on the current value of the calibrated quantity, including: Judge whether the current value of the calibrated quantity is zero; If the current value of the calibrated quantity is zero, determine that the output signal of the delay module is a first value; If the current value of the calibrated quantity is not zero, determine that the output signal of the delay module is a second value.

4. The method according to claim 3, wherein Judge whether to exit the delay mode based on the output signal, including: If the output signal of the delay module is the first value, exit the delay mode; If the output signal of the delay module is the second value, do not exit the delay mode and continue to update the calibrated quantity.

5. The method according to claim 3, wherein After judging whether the current value of the calibrated quantity is zero, it further includes: If the current value of the calibrated quantity is not zero and a second gun insertion signal of the charging gun is obtained, input the second gun insertion signal into the delay module; Reset the current value of the calibrated quantity to the initial value, and update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size.

6. The method according to claim 2, wherein Update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size, including: Update the calibrated quantity according to the following formula: K = K - a where K is the calibrated quantity and a is the preset step size.

7. A battery management system, characterized in that, It includes: A signal acquisition module, which is used to input the first gun insertion signal into the delay module to enter the delay mode if the first gun insertion signal of the charging gun is obtained; A delay module, which is used to determine the output signal based on the preset calibrated quantity; A detection module, which is used to judge whether to exit the delay mode based on the output signal and perform relay adhesion detection after exiting the delay mode.

8. The battery management system according to claim 7, wherein The delay module is further used for: Obtain the initial value of the calibrated quantity; Update the calibrated quantity based on the initial value of the calibrated quantity and the preset step size to obtain the current value of the calibrated quantity; Determine the output signal of the delay module based on the current value of the calibrated quantity.

9. A vehicle, characterized in that, It includes a processor and a memory. The memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the steps of the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is run by the processor, it executes the steps of the method according to any one of claims 1 to 6 above.

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