Method, system, medium, and apparatus for parked power generation control during battery overdischarge

Abstract

The application discloses a kind of for battery overdischarge's parking power generation control method, system, medium and electronic equipment, battery management system method includes: response to the request of parking power generation sent by vehicle control unit, judge whether the current state of battery meets preset charging condition;In the case where preset charging condition is met, existing high voltage fault is removed, generates agree parking power generation signal, is sent to vehicle control unit, starts timing;Response to the request of high voltage sent by vehicle control unit, execute high voltage operation, to make vehicle enter parking power generation state, charge battery;In the case where the duration of timing is greater than or equal to preset duration, judge whether the charging process is normal, obtain the result of judging;According to the result of judging, determine whether to continue charging battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a parking power generation control method, system, medium and electronic equipment for battery overdischarge. BACKGROUND

[0002] In the daily operation of a hybrid vehicle, the battery as a core energy storage unit, its performance is directly related to the running efficiency and reliability of the vehicle. Especially in the case of serious overdischarge of battery state of charge (SOC) or serious overdischarge of single cell voltage, the battery performance decreases sharply, which may cause the battery management system (BMS) to report a serious fault, and then cause the vehicle to be unable to go to high voltage, thereby seriously affecting the normal operation of the vehicle.

[0003] In the related art, for example Figure 1 As shown in the prior art, the existing hybrid power system generally includes an engine, a clutch and a motor, which are connected in sequence, and the output end of the motor is connected to a transmission. The vehicle operating conditions are complex, and the battery management system (BMS) will report a serious fault when the battery is overdischarged, which causes the vehicle to be unable to go to high voltage, and can only rely on external charging piles for charging.

[0004] However, for hybrid vehicles, in addition to charging piles, there is also a parking power generation charging method, but in this mode, the high voltage system must be normal. Since the current technology cannot perform parking power generation / road power generation / energy recovery when the BMS reports a serious fault after the battery is overdischarged, which causes the vehicle to be unable to go to high voltage and cannot be self-recovered, the battery cannot be charged, and the BMS fault cannot be eliminated. SUMMARY

[0005] The embodiments of the present application provide a parking power generation control method, system, medium and electronic equipment for battery overdischarge. In order to have a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This part is not a general review, nor is it intended to determine the key / important elements or delineate the protection scope of these embodiments. Its only purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0006] In a first aspect, the embodiments of the present application provide a parking power generation control method for battery overdischarge, applied to a battery management system, the method comprising:

[0007] In response to a parking power generation request sent by a vehicle control unit, determining whether the current state of the battery meets a preset charging condition; the parking power generation request is generated when the vehicle has a high voltage failure caused by battery overdischarge and the vehicle control unit determines that the vehicle meets a preset parking power generation condition;

[0008] In the case of meeting the preset charging condition, the existing high-voltage fault is removed, and a consent parking power generation signal is generated and sent to the vehicle control unit to start timing;

[0009] In response to the high-voltage request sent by the vehicle control unit, the high-voltage operation is performed to make the vehicle enter the parking power generation state and charge the battery;

[0010] In the case where the timing duration is greater than or equal to the preset duration, it is determined whether the charging process is normal, and a determination result is obtained;

[0011] According to the determination result, it is determined whether to continue charging the battery.

[0012] Optionally, the battery over-discharge is that the state of charge of the battery of the vehicle or the battery cell voltage is less than a preset value, and the high-voltage fault is that the battery management system cuts off the high-voltage power supply.

[0013] Optionally, according to the determination result, it is determined whether to continue charging the battery, including:

[0014] In the case where the determination result indicates that the charging process is normal, the charging of the battery is continued to make the vehicle return to normal.

[0015] Optionally, according to the determination result, it is determined whether to continue charging the battery, including:

[0016] In the case where the determination result indicates that the charging process is abnormal, the high-voltage operation is performed to restore the existing high-voltage fault;

[0017] A prompt information for reminding the user of the failure of the parking power generation is created;

[0018] The prompt information is sent to the instrument for display.

[0019] Optionally, the determination of whether the charging process is normal obtains a determination result, including:

[0020] An initial battery state of charge stored in advance during charging is obtained;

[0021] The current battery state of charge of the battery is obtained;

[0022] The difference between the current battery state of charge and the initial battery state of charge is calculated;

[0023] In the case where the difference is greater than or equal to a preset difference threshold, a determination result indicating that the charging process is normal is generated; or,

[0024] In the case where the difference is less than the preset difference threshold, a determination result indicating that the charging process is abnormal is generated.

[0025] Optionally, the method further includes:

[0026] In the case where the driving demand occurs, the high-pressure lowering operation is performed to make the whole vehicle exit the parking power generation state; the driving demand at least includes the gear engagement operation or the handbrake release operation; or

[0027] In the case where the driving demand does not occur, the charging of the battery is continuously performed.

[0028] Optionally, the preset parking power generation condition includes that the vehicle speed is 0, the current gear of the whole vehicle is the N gear, and the handbrake is not released.

[0029] In a second aspect, the embodiments of the present application provide a parking power generation control system for battery overdischarge, which comprises:

[0030] The first response module is configured to determine whether the current state of the battery meets the preset charging condition in response to the parking power generation request sent by the whole vehicle control unit; the parking power generation request is generated when the whole vehicle has the high-pressure lowering fault caused by the battery overdischarge and the whole vehicle control unit determines that the whole vehicle meets the preset parking power generation condition;

[0031] The release module is configured to release the existing high-pressure lowering fault and generate the parking power generation signal in the case where the preset charging condition is met, and send the parking power generation signal to the whole vehicle control unit to start timing.

[0032] The second response module is configured to perform the high-pressure raising operation in response to the high-pressure raising request sent by the whole vehicle control unit, so that the whole vehicle enters the parking power generation state and the battery is charged.

[0033] The determination module is configured to determine whether the charging process is normal in the case where the timing duration is greater than or equal to the preset duration, and obtain a determination result.

[0034] The determination module is configured to determine whether the charging process is normal in the case where the timing duration is greater than or equal to the preset duration, and obtain a determination result.

[0035] In a third aspect, the embodiments of the present application provide a computer storage medium, which stores a plurality of instructions, and the instructions are suitable for being loaded by a processor and performing the method steps described above.

[0036] In a fourth aspect, the embodiments of the present application provide an electronic device, which can include a processor and a memory; the memory stores a computer program, and the computer program is suitable for being loaded by the processor and performing the method steps described above.

[0037] The technical solutions provided by the embodiments of the present application can have the following beneficial effects:

[0038] In the embodiments of the present application, on one hand, when the high-voltage fault caused by battery over-discharge exists and the preset conditions for parking power generation are met, the battery management system can temporarily release the high-voltage fault to realize parking power generation, thereby improving the fault handling capability of the vehicle; on the other hand, the battery management system only temporarily releases the high-voltage fault to realize parking power generation when the vehicle meets the preset conditions for parking power generation, and if the charging is normal in a period of time, the charging continues, and if the charging is abnormal, the high-voltage fault is restored in time, which can prevent damage to the battery.

[0039] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0040] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0041] Figure 1 is a component architecture diagram of a vehicle interior provided by an embodiment of the present application;

[0042] Figure 2 is a flowchart of a parking power generation control method for battery over-discharge provided by the present application;

[0043] Figure 3 is a flowchart of a parking power generation control process for battery over-discharge provided by the present application;

[0044] Figure 4 is a structural diagram of a parking power generation control system for battery over-discharge provided by an embodiment of the present application;

[0045] Figure 5 is a structural diagram of an electronic device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0046] The following description and drawings sufficiently illustrate specific embodiments of the present application to enable one of ordinary skill in the art to practice them.

[0047] It should be clear that the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0048] The following description refers to the accompanying drawings. Unless otherwise noted, like elements in different drawings have the same or similar reference numerals. The following description of the example embodiments is not meant to represent all embodiments consistent with the present application. Rather, they are simply examples of some aspects consistent with the present application as detailed in the appended claims.

[0049] In the description of the present application, it is understood that the terms "first", "second" and the like are used to describe various elements, but not to indicate or imply relative importance. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "a plurality of" means two or more, unless otherwise specified. The "and / or" describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects.

[0050] The present application provides a method, system, medium and electronic device for battery over-discharge parking power generation control to solve the problems existing in the above related technical problems. In the embodiments of the present application, on the one hand, when the vehicle has a high voltage fault caused by battery over-discharge and meets the preset parking power generation condition, the battery management system can temporarily remove the high voltage fault to realize parking power generation, and improve the vehicle fault handling capability; on the other hand, the battery management system only temporarily removes the high voltage fault for parking charging when the vehicle meets the preset parking power generation condition, if the charging is normal in a period of time, continue to charge, if the charging is abnormal, the high voltage fault is restored in time, which can prevent damage to the battery. The following will be described in detail by exemplary embodiments.

[0051] The following will be described in detail by exemplary embodiments. Figure 1 -Appendix Figure 3 The method for battery over-discharge parking power generation control provided in the embodiments of the present application is described in detail. The method can be realized by relying on a computer program and can run on a battery over-discharge parking power generation control system based on von Neumann architecture. The computer program can be integrated in an application or run as an independent tool application.

[0052] Please refer to Figure 2 A flowchart of a method for battery over-discharge parking power generation control is provided in the embodiments of the present application, which is applied to a battery management system. As shown in Figure 2 The method of the present application can include the following steps:

[0053] S101, in response to the parking power generation request sent by the vehicle control unit, determine whether the current state of the battery meets the preset charging condition; the parking power generation request is generated when the vehicle has a high voltage fault caused by battery over-discharge and the vehicle control unit determines that the vehicle meets the preset parking power generation condition;

[0054] Wherein, the vehicle control unit (HCU) is responsible for managing the components of the vehicle high voltage system, including the control and coordination of high voltage components such as battery, motor, etc. The parking power generation request is a signal sent by HCU to BMS, indicating that the vehicle is preparing to generate power in the parking state. The battery management system (BMS) is responsible for monitoring and managing the state of the battery, including the voltage, current, temperature and state of charge (SOC) of the battery. The preset charging condition is the condition used by BMS to determine whether the battery is suitable for charging, which may include parameters such as SOC, temperature, voltage of the battery. The preset parking power generation condition includes the vehicle speed of 0, the current gear of the vehicle is N, the hand brake is not released.

[0055] Wherein, the battery over-discharge is the state of charge of the battery or the voltage of the battery cell is less than the preset value, and the high voltage fault is the battery management system cutting off the high voltage power supply.

[0056] In some embodiments of the present application, a hybrid vehicle is driving in urban traffic, and the BMS reports a serious fault of battery over-discharge, and the vehicle is therefore in a high voltage state. Determine whether the state of charge of the battery or the voltage of the battery cell is less than the preset value, and if so, generate a parking power generation message to the instrument for display to prompt the user to perform parking power generation. At the same time, the HCU determines whether the vehicle meets the parking power generation condition in addition to the high voltage state, which specifically includes the vehicle speed of 0, N gear, hand brake, etc. If so, generate a parking power generation request and send it to the battery management system BMS. The battery management system BMS responds to the parking power generation request sent by the vehicle control unit, and the BMS checks the current state of the battery, including SOC, voltage, temperature, etc., to determine whether the current state of the battery meets the preset charging condition.

[0057] S102, in the case of meeting the preset charging condition, remove the existing high voltage fault, and generate an agreement parking power generation signal to the vehicle control unit, and start timing;

[0058] In some embodiments of the present application, once the BMS confirms that the battery state meets the preset charging condition, the BMS will remove the high voltage fault state triggered by the battery over-discharge, which means that the BMS will allow the high voltage system to be reactivated. The BMS generates a signal indicating that the battery is ready for parking power generation, which is an explicit indication of the agreement to parking power generation. The BMS sends the parking power generation signal back to the HCU, informing the HCU that the battery is ready for charging. After receiving the agreement signal from the BMS, the HCU starts timing to track the duration of the parking power generation process.

[0059] S103, in response to the high-voltage request sent by the vehicle control unit, performing a high-voltage operation to make the vehicle enter a parking power generation state and charge the battery;

[0060] The high-voltage request is a signal sent by the HCU to the BMS, requesting the BMS to switch the high-voltage system of the vehicle from a low-voltage state to a high-voltage state for parking power generation. The high-voltage operation refers to the BMS responding to the request of the HCU and activating the high-voltage system through internal control logic to make the vehicle enter a state where parking power generation can be performed. The parking power generation state refers to a working mode in which the vehicle is in a stationary state (such as a vehicle speed of 0, in neutral, and the hand brake is pulled up) and the engine drives the motor to charge the battery. In the parking power generation state, the engine of the vehicle drives the motor to generate electric energy, and this part of electric energy is used to charge the battery.

[0061] In some embodiments of the present application, after receiving the request of the HCU, the BMS checks the battery state and confirms that the battery can safely accept charging. If everything is normal, the BMS performs the operation to activate the high-voltage system and allow current to flow to the battery. After the high-voltage system is activated, the vehicle enters the parking power generation state. At this time, the engine is started and drives the P2 motor through the clutch, and the motor operates as a generator to generate electric energy which is transmitted to the battery through the high-voltage cable. In the parking power generation state, the electric energy generated by the motor is used to charge the battery.

[0062] S104, in a case where the time length is greater than or equal to the preset time length, determining whether the charging process is normal to obtain a determination result;

[0063] In some embodiments of the present application, the specific process of determining whether the charging process is normal to obtain a determination result includes: obtaining an initial battery state of charge stored in advance during charging; obtaining a current battery state of charge of the battery; calculating a difference between the current battery state of charge and the initial battery state of charge; in a case where the difference is greater than or equal to a preset difference threshold, generating a determination result indicating that the charging process is normal; or in a case where the difference is less than the preset difference threshold, generating a determination result indicating that the charging process is abnormal.

[0064] For example, before starting charging, the BMS records the initial state of charge (SOC_initial) of the battery. This value is the percentage of the remaining capacity of the battery before charging. At some point during the charging process, the BMS measures and records the current state of charge (SOC_current) of the battery again. This value is the percentage of the remaining capacity of the battery at a certain time during the charging process. The BMS sets a preset difference threshold (ΔSOC_threshold), which is a predetermined value used to determine whether the charging process is normal. This threshold is set based on the characteristics of the battery and safety requirements. If the calculated ΔSOC is greater than or equal to ΔSOC_threshold, the BMS generates a determination result indicating that the charging process is normal. This means that the battery charging capacity has reached the expected value, and the charging process is normal. If ΔSOC is less than ΔSOC_threshold, the BMS generates a determination result indicating that the charging process is abnormal. This may mean that the charging efficiency is low or there are other problems.

[0065] Suppose the initial state of charge of the battery at the beginning of charging is 20% (SOC_initial = 20%), and the current state of charge after charging for a period of time is 30% (SOC_current = 30%). The preset difference threshold is 10% (ΔSOC_threshold = 10%). ΔSOC = SOC_current - SOC_initial = 30% - 20% = 10%. Since ΔSOC is equal to ΔSOC_threshold, the BMS generates a determination result indicating that the charging process is normal. If ΔSOC is less than 10%, such as only 5%, then the BMS will generate a determination result indicating that the charging process is abnormal, which may require further diagnosis and processing.

[0066] S105, according to the determination result, determining whether to continue charging the battery.

[0067] In some embodiments of the present application, the specific process of determining whether to continue charging the battery according to the determination result includes: in the case where the determination result indicates that the charging process is normal, continuing to control the charging of the battery to restore the vehicle to normal.

[0068] In some embodiments of the present application, the specific process of determining whether to continue charging the battery according to the determination result includes: in the case where the determination result indicates that the charging process is abnormal, performing a high-voltage operation to restore the existing high-voltage fault; creating a prompt information for reminding the user of the failure of the vehicle to generate power while parked; and sending the prompt information to the instrument for display.

[0069] Further, in the case that a driving demand occurs, the high pressure is executed to make the vehicle exit the parking power generation state; the driving demand at least includes a gear shifting operation or a handbrake releasing operation; or, in the case that the driving demand does not occur, the charging of the battery is continuously executed.

[0070] For example Figure 3 As shown, Figure 3 is a flowchart of a parking power generation control process for battery overdischarge provided by the present application. First, it is judged whether the battery is caused to be in a low pressure state due to a serious overdischarge fault. If not (N), the process ends. If yes (Y), the instrument prompts the driver to perform parking power generation. The HCU (vehicle control unit) judges whether the vehicle meets the parking power generation condition except for the high pressure state. If not (N), the process returns to the battery overdischarge fault judgment and continues to monitor. If yes (Y), the HCU sends a parking power generation request to the BMS (battery management system). The BMS judges whether the current state of the battery meets the charging condition. If not (N), the process ends. If yes (Y), the process continues. The BMS temporarily removes the overdischarge related serious fault, feeds back a parking power generation signal to the HCU, and starts timing. The HCU sends a high pressure request, and the BMS executes the high pressure operation. The vehicle enters the parking power generation state. It is judged whether the timer reaches a preset value. If not (N), the parking power generation continues. If yes (Y), the process continues. The BMS judges whether the charging process is normal. If not (N), the overdischarge related serious fault is restored, the vehicle is in a low pressure state, the driver is reminded of the parking power generation failure, and the process ends. If yes (Y), the next step continues. After a period of parking power generation, the BMS automatically removes the overdischarge related serious fault, and the vehicle state returns to normal. The process ends when the vehicle state returns to normal. During the parking power generation process, it is judged in real time whether the driver has a driving demand. If yes (Y), the parking power generation is exited, and the BMS executes a normal logic. If not (N), the parking power generation continues.

[0071] In the embodiments of the present application, on the one hand, when the vehicle has a low pressure fault caused by battery overdischarge and meets a preset parking power generation condition, the battery management system can temporarily remove the low pressure fault to realize parking power generation, thereby improving the vehicle fault handling capability. On the other hand, the battery management system only temporarily removes the low pressure fault to perform parking charging when the vehicle meets the preset parking power generation condition. If the charging is normal within a period of time, the charging continues. If the charging is abnormal, the low pressure fault is restored in time, thereby preventing damage to the battery.

[0072] The following is an embodiment of the system of the present application, which can be used to execute the method embodiments of the present application. For details not disclosed in the system embodiments of the present application, please refer to the method embodiments of the present application.

[0073] Please refer to Figure 4Fig. 1 is a structural schematic diagram of a vehicle-mounted power generation control system for battery over-discharge according to an example embodiment of the present application. The vehicle-mounted power generation control system for battery over-discharge can be implemented as all or part of an electronic device by software, hardware, or a combination of both. The system 1 includes a first response module 10, a release module 20, a second response module 30, a judgment module 40, and a determination module 50.

[0074] The first response module 10 is configured to determine whether a current state of the battery meets a preset charging condition in response to a vehicle-mounted power generation request sent by the vehicle control unit. The vehicle-mounted power generation request is generated when the vehicle has a high-voltage fault caused by battery over-discharge and the vehicle control unit determines that the vehicle meets a preset vehicle-mounted power generation condition.

[0075] The release module 20 is configured to release the existing high-voltage fault and generate an agree signal for vehicle-mounted power generation and send it to the vehicle control unit to start timing when the preset charging condition is met.

[0076] The second response module 30 is configured to perform a high-voltage operation to make the vehicle enter a vehicle-mounted power generation state and charge the battery in response to a high-voltage request sent by the vehicle control unit.

[0077] The judgment module 40 is configured to determine whether the charging process is normal and obtain a judgment result when the timing duration is greater than or equal to a preset duration.

[0078] The determination module 50 is configured to determine whether to continue charging the battery according to the judgment result.

[0079] It should be noted that the vehicle-mounted power generation control system for battery over-discharge provided in the above example is only used to illustrate the division of the above functional modules when the vehicle-mounted power generation control method for battery over-discharge is executed. In actual applications, the above functions can be completed by different functional modules according to needs, i.e., the internal structure of the device is divided into different functional modules to complete all or part of the above described functions. In addition, the vehicle-mounted power generation control system for battery over-discharge provided in the above example and the vehicle-mounted power generation control method for battery over-discharge embodiment belong to the same concept, and the implementation process is described in detail in the method embodiment. Here, it is not repeated.

[0080] The above example numbers of the present application are only for description, not representing the advantages and disadvantages of the examples.

[0081] In the embodiments of the present application, on one hand, when the high-voltage fault caused by battery over-discharge exists and the preset parking power generation condition is met, the battery management system can temporarily release the high-voltage fault to realize parking power generation, thereby improving the fault handling capability of the vehicle; on the other hand, the battery management system only temporarily releases the high-voltage fault to realize parking power generation when the vehicle meets the preset parking power generation condition, and if the charging is normal in a period of time, the charging continues, and if the charging is abnormal, the high-voltage fault is restored in time, thereby preventing damage to the battery.

[0082] The present application also provides a computer readable medium having program instructions stored thereon, which, when executed by a processor, implement the parking power generation control method for battery over-discharge provided by each of the method embodiments.

[0083] The present application also provides a computer program product containing instructions, which, when running on a computer, causes the computer to execute the parking power generation control method for battery over-discharge of each of the method embodiments.

[0084] Please refer to Figure 5 The present application provides a structural schematic diagram of an electronic device. As shown in Figure 5 The electronic device 1000 can include at least one processor 1001, at least one network interface 1004, a user interface 1003, a memory 1005, and at least one communication bus 1002.

[0085] The communication bus 1002 is used to realize the connection and communication between the components.

[0086] The user interface 1003 can include a display screen (Display), a camera (Camera), and can also include a standard wired interface and a wireless interface.

[0087] The network interface 1004 can optionally include a standard wired interface and a wireless interface (such as a WI-FI interface).

[0088] The processor 1001 may include one or more processing cores. The processor 1001 utilizes various interfaces and circuits to connect the various components within the entire electronic device 1000. By running or executing instructions, programs, code sets, or instruction sets stored in the memory 1005, and calling data stored in the memory 1005, the processor 1001 performs various functions of the electronic device 1000 and processes data. Optionally, the processor 1001 may be implemented in the form of at least one hardware component selected from the group consisting of a digital signal processing (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 1001 may integrate one or a combination of a central processing unit (CPU), a graphics processing unit (GPU), and a modem. The CPU primarily processes the operating system, user interface, and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display; and the modem is responsible for handling wireless communications. It is understood that the modem may not be integrated into the processor 1001 and may be implemented separately on a single chip.

[0089] Among them, the memory 1005 may include a random access memory (RAM) or a read-only memory (Read-Only Memory). Optionally, the memory 1005 includes a non-transitory computer-readable storage medium. The memory 1005 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 1005 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 1005 may also be optionally at least one storage system located away from the aforementioned processor 1001. As Figure 5 As shown, the memory 1005 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an application program for controlling parking power generation when the battery is over-discharged.

[0090] exist Figure 5The user interface 1003 in the electronic device 1000 shown is mainly used to provide an interface for user input and obtain data input by the user, and the processor 1001 can be used to call the battery over-discharge parking power generation control application stored in the memory 1005 and specifically perform the following operations:

[0091] In response to the parking power generation request sent by the vehicle control unit, it is determined whether the current state of the battery meets the preset charging condition; the parking power generation request is generated when the vehicle has a high-voltage fault caused by battery over-discharge and the vehicle control unit determines that the vehicle meets the preset parking power generation condition;

[0092] In the case where the preset charging condition is met, the existing high-voltage fault is removed, and an agreement parking power generation signal is generated and sent to the vehicle control unit to start timing;

[0093] In response to the high-voltage request sent by the vehicle control unit, the high-voltage operation is performed to make the vehicle enter the parking power generation state and charge the battery;

[0094] In the case where the timing duration is greater than or equal to the preset duration, it is determined whether the charging process is normal, and a determination result is obtained;

[0095] According to the determination result, it is determined whether to continue charging the battery.

[0096] In one embodiment, when the processor 1001 performs the operation of determining whether to continue charging the battery according to the determination result, it specifically performs the following operations:

[0097] In the case where the determination result indicates that the charging process is normal, the charging of the battery is continued to make the vehicle return to normal.

[0098] In one embodiment, when the processor 1001 performs the operation of determining whether to continue charging the battery according to the determination result, it specifically performs the following operations:

[0099] In the case where the determination result indicates that the charging process is abnormal, the high-voltage operation is performed to restore the existing high-voltage fault;

[0100] Create a prompt information for reminding the user of the failure of the parking power generation;

[0101] Send the prompt information to the instrument for display.

[0102] In one embodiment, when the processor 1001 performs the operation of determining whether the charging process is normal and obtaining a determination result, it specifically performs the following operations:

[0103] Obtain the initial battery state of charge stored in advance during charging;

[0104] Obtain the current battery state of charge of the battery;

[0105] calculating a difference between the current battery state of charge and the initial battery state of charge;

[0106] generating a determination result indicating that the charging process is normal when the difference is greater than or equal to a preset difference threshold; or

[0107] generating a determination result indicating that the charging process is abnormal when the difference is less than the preset difference threshold.

[0108] In one embodiment, the processor 1001 further performs the following operations:

[0109] performing a low-voltage release operation to make the vehicle exit the parked power generation state when a driving demand occurs; the driving demand at least includes a gear shifting operation or a handbrake release operation; or

[0110] continuing to charge the battery when the driving demand does not occur.

[0111] In the embodiments of the present application, on the one hand, when the vehicle has a low-voltage release failure caused by battery overdischarge and meets a preset parked power generation condition, the battery management system can temporarily release the low-voltage release failure to realize parked power generation, thereby improving the vehicle fault handling capability; on the other hand, the battery management system only temporarily releases the low-voltage release failure to charge the battery when the vehicle meets the preset parked power generation condition, and if the charging is normal in a period of time, the charging continues, and if the charging is abnormal, the low-voltage release failure is restored in time, which can prevent damage to the battery.

[0112] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware, and the program for parked power generation control when battery overdischarge can be stored in a computer readable storage medium. When the program is executed, it can include the processes of the above-mentioned embodiments. The storage medium of the program for parked power generation control when battery overdischarge can be a magnetic disk, an optical disk, a read-only memory or a random access memory, etc.

[0113] The above only describes the preferred embodiments of the present application, and of course cannot limit the scope of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope of the present application.

Claims

1. A method for controlling a stationary power generation when a battery is overdischarged, characterized by, The method is applied to a battery management system, and comprises the following steps: In response to a request for parking power generation sent by a vehicle control unit, it is determined whether a current state of a battery meets a preset charging condition; the request for parking power generation is generated when a vehicle exists a low-voltage fault caused by over-discharge of the battery and the vehicle control unit determines that the vehicle meets a preset parking power generation condition; In the case where the preset charging condition is met, the existing low-voltage fault is removed, and a signal for agreeing to parking power generation is generated and sent to the vehicle control unit to start timing; In response to a request for high-voltage sent by the vehicle control unit, a high-voltage operation is performed to make the vehicle enter a parking power generation state and charge the battery; In the case where the timing duration is greater than or equal to a preset duration, it is determined whether the charging process is normal to obtain a determination result; According to the determination result, it is determined whether to continue charging the battery.

2. The method of claim 1, wherein, The over-discharge of the battery is that a state of charge of the battery or a voltage of a battery cell of the vehicle is less than a preset value, and the low-voltage fault is that a high-voltage power supply of the battery management system is cut off.

3. The method of claim 1, wherein, The determination whether to continue charging the battery according to the determination result comprises: In the case where the determination result indicates that the charging process is normal, the charging of the battery is continued to make the vehicle return to normal.

4. The method of claim 1, wherein, The determination whether to continue charging the battery according to the determination result comprises: In the case where the determination result indicates that the charging process is abnormal, a low-voltage operation is performed to restore the existing low-voltage fault; A prompt information for reminding a user of parking power generation failure is created; The prompt information is sent to an instrument for display.

5. The method of claim 1, wherein, The determination whether the charging process is normal to obtain a determination result comprises: An initial state of charge of the battery stored in advance during charging is obtained; A current state of charge of the battery is obtained; A difference between the current state of charge and the initial state of charge is calculated; In the case where the difference is greater than or equal to a preset difference threshold, a determination result indicating that the charging process is normal is generated; or In the case where the difference is less than the preset difference threshold, a determination result indicating that the charging process is abnormal is generated.

6. The method according to any one of claims 1 to 5, characterized in that, The method further comprises: In the case where a driving demand occurs, a low-voltage operation is performed to make the vehicle exit the parking power generation state; the driving demand at least comprises a gear shifting operation or a handbrake releasing operation; or In the case where no driving demand occurs, the charging of the battery is continued.

7. The method of claim 1, wherein, The preset parking power generation condition comprises that a vehicle speed is 0, a current gear of the vehicle is N, and a handbrake is not released.

8. A control system for a stationary power generation when a battery is over-discharged, characterized by, The system comprises: A first response module for determining whether a current state of a battery meets a preset charging condition in response to a request for parking power generation sent by a vehicle control unit; the request for parking power generation is generated when a vehicle exists a low-voltage fault caused by over-discharge of the battery and the vehicle control unit determines that the vehicle meets a preset parking power generation condition; A removal module for removing the existing low-voltage fault in the case where the preset charging condition is met, generating a signal for agreeing to parking power generation, and sending the signal to the vehicle control unit to start timing; A second response module is configured to perform a high-voltage raising operation in response to a high-voltage raising request sent by the vehicle control unit, so that the vehicle enters a parking power generation state and the battery is charged. A determination module is configured to determine whether the charging process is normal when the time length is greater than or equal to the preset time length, and obtain a determination result. The determination module is configured to determine whether to continue charging the battery according to the determination result.

9. A computer storage medium, characterized in that The computer storage medium stores a plurality of instructions, which are suitable for being loaded and executed by a processor to implement the method of any one of claims 1-7.

10. An electronic device, comprising: Comprise: A processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded and executed by the processor to implement the method of any one of claims 1-7. A processor and a memory; wherein the memory stores a computer program, and the computer program is suitable for being loaded and executed by the processor to implement the method of any one of claims 1-7.

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