Boost charging control method and device of battery management system, equipment and medium

Abstract

The application relates to the technical field of new energy automobile battery management, in particular to a battery management system voltage-boosting charging control method and device, equipment and a medium, wherein the method comprises the following steps: collecting output voltage, communication protocol version and output capacity information of a charging device, and collecting rated voltage and real-time state information of a power battery; determining whether to start a voltage-boosting charging mode according to the output voltage and the rated voltage; in response to the voltage-boosting charging mode, calculating a target charging voltage interval according to the real-time state information and the output capacity information, so as to lift the voltage input by the charging device to the target charging voltage interval; feeding back vehicle charging demand and power battery state to the charging device, and receiving operation state information returned by the charging device, so as to adjust the output current of the vehicle voltage-boosting module to follow the power battery state during the charging process, and complete smooth switching from constant-current charging to constant-voltage charging. Thus, the charging compatibility problem of 500V charging piles and 800V high-voltage platform vehicles is solved.

Description

Technical Field

[0001] This application relates to the field of battery management technology for new energy vehicles, and in particular to a boost charging control method, device, equipment and medium for a battery management system (BMS) suitable for 800V high-voltage platform vehicles. Background Technology

[0002] With the rapid development of new energy vehicle technology, the 800V high-voltage platform has gradually become the mainstream configuration for mid-to-high-end new energy vehicles due to its advantages of fast charging speed and high energy efficiency. However, most of the existing charging piles on the market are currently 500V voltage level. Because the output voltage of the charging piles does not match the rated voltage of the power battery of 800V high-voltage platform vehicles, the vehicles cannot be charged directly, which seriously affects the user experience and also limits the market promotion of 800V high-voltage platform vehicles.

[0003] The existing solutions mainly include two types: one is to massively upgrade existing 500V charging piles to support 800V voltage output, but this solution is costly and time-consuming, and difficult to achieve in the short term; the other is to equip the vehicle with a dedicated charging adapter, but the adapter is inconvenient to carry and has problems such as low voltage conversion efficiency and safety hazards.

[0004] Therefore, there is an urgent need for a technical solution that can achieve cross-voltage platform charging without relying on external equipment or modifying charging piles, and can be achieved solely through the vehicle's own configuration. Summary of the Invention

[0005] This application provides a boost charging control method, device, equipment, and medium for a battery management system to solve the charging compatibility problem between 500V charging piles and 800V high-voltage platform vehicles.

[0006] The first aspect of this application provides a boost charging control method for a battery management system, comprising the following steps: Collect the output voltage and output capacity information of the charging equipment, and collect the rated voltage and real-time status information of the power battery; Determine whether to activate the boost charging mode based on the output voltage and the rated voltage; In response to the boost charging mode, the target charging voltage range is calculated based on the real-time status information and the output capability information, and a start command is sent to the vehicle boost module to boost the voltage input to the charging device to the target charging voltage range. The system feeds back the vehicle's charging needs and the status of the power battery to the charging equipment, and simultaneously receives the operating status information returned by the charging equipment. During the charging process, the system adjusts the output current of the on-board boost module according to the status of the power battery, thus completing a smooth switch from the constant current charging stage to the constant voltage charging stage.

[0007] Optionally, determining whether to activate the boost charging mode based on the output voltage and the rated voltage includes: The output voltage is compared with the rated voltage. If the output voltage is lower than the rated voltage, the boost charging mode is activated. If the output voltage matches the rated voltage, the normal charging mode is activated.

[0008] Optionally, it also includes: During the charging process, the real-time status information of the power battery and the working status of the vehicle boost module are monitored in real time. When any parameter of the real-time status information and the working status exceeds the preset safety threshold, the vehicle boost module is triggered to reduce power or shut down for protection.

[0009] Optionally, it also includes: When the remaining charge of the power battery rises to a preset charging termination threshold, the on-board boost module is controlled to stop working and a charging termination message is sent to the charging equipment.

[0010] A second aspect of this application provides a boost charging control device for a battery management system, comprising: The parameter acquisition module is used to acquire the output voltage and output capacity information of the charging equipment, as well as the rated voltage and real-time status information of the power battery. The determination module is used to determine whether to activate the boost charging mode based on the output voltage and the rated voltage. A boost module is used to respond to the boost charging mode, calculate the target charging voltage range based on the real-time status information and the output capability information, and send a start command to the vehicle boost module to boost the voltage input to the charging device to the target charging voltage range. The communication adjustment module is used to feed back the vehicle's charging needs and the status of the power battery to the charging equipment, and at the same time receive the operating status information returned by the charging equipment, so as to adjust the output current of the on-board boost module according to the status of the power battery during the charging process, and complete the smooth switching from the constant current charging stage to the constant voltage charging stage.

[0011] Optionally, the determination module includes: The output voltage is compared with the rated voltage. If the output voltage is lower than the rated voltage, the boost charging mode is activated. If the output voltage matches the rated voltage, the normal charging mode is activated.

[0012] Optionally, it also includes: The monitoring and fault handling module is used to monitor the real-time status information of the power battery and the working status of the vehicle boost module during the charging process. When any parameter of the real-time status information and the working status exceeds a preset safety threshold, the power reduction or shutdown protection action of the vehicle boost module is triggered.

[0013] Optionally, it also includes: The charging termination module is used to control the on-board boost module to stop working and send a charging termination message to the charging equipment when the remaining power of the power battery rises to a preset charging termination threshold.

[0014] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the boost charging control method of the battery management system as described in the above embodiments.

[0015] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the boost charging control method of the battery management system described above.

[0016] The battery management system boost charging control method and device proposed in this application solves the charging compatibility problem between 500V charging piles and 800V high-voltage platform vehicles. It eliminates the need to modify existing charging piles, reducing infrastructure upgrade costs and improving user experience. By integrating an on-board boost module into the battery management system (BMS) for direct control, it achieves high voltage regulation accuracy, fast response speed, and a charging conversion efficiency of ≥96%, ensuring high charging efficiency. It incorporates multiple safety protection mechanisms, including overvoltage, overcurrent, overtemperature, short-circuit protection, and insulation monitoring, comprehensively ensuring the safety and reliability of the charging process. The system has a simple structure and can be integrated into existing vehicle battery management system (BMS) architectures without requiring additional complex equipment, facilitating mass production and widespread application.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of a boost charging control method for a battery management system according to an embodiment of this application; Figure 2 This is a block diagram of a boost charging control device for a battery management system according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 20-Boost charging control device for battery management system, 201-Parameter acquisition module, 202-Judgment module, 203-Boost module, 204-Communication adjustment module, 301-Memory, 302-Processor and 303-Communication interface. Detailed Implementation

[0020] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0021] The following description, with reference to the accompanying drawings, describes a boost charging control method, apparatus, device, and medium for a battery management system according to embodiments of this application.

[0022] Figure 1 This is a flowchart of a boost charging control method for a battery management system according to an embodiment of this application.

[0023] like Figure 1 As shown, the boost charging control method of this battery management system includes the following steps: In step S101, the output voltage and output capacity information of the charging device are collected, and the rated voltage and real-time status information of the power battery are collected.

[0024] In actual operation, after the target vehicle is physically connected to the charging pile, the Battery Management System (BMS) comprehensively collects parameters such as the charging pile's output voltage, output current, battery temperature, and remaining battery charge (SOC) through the voltage sensor, current sensor, temperature sensor, and remaining charge detection unit of the charging interface. At the same time, it reads information such as the charging pile's communication protocol version and maximum output power through the communication module to provide data support for the BMS's subsequent decision-making. Simultaneously, it collects real-time status information such as the rated voltage, current remaining charge (SOC), individual cell voltage, and battery temperature of the power battery.

[0025] In this embodiment, a high-precision voltage sensor with an error of ≤ ±0.5%, a current sensor with an error of ≤ ±1%, and an NTC temperature sensor with a measurement range of -40℃ to 125℃ can be used. The remaining power detection unit adopts the ampere-hour integration method combined with open-circuit voltage calibration, and the estimation accuracy of the remaining power detection unit is ≤ ±3%.

[0026] In step S102, it is determined whether to activate the boost charging mode based on the output voltage and the rated voltage.

[0027] In some embodiments, determining whether to activate the boost charging mode based on the output voltage and the rated voltage includes: The output voltage is compared with the rated voltage. If the output voltage is lower than the rated voltage, it is determined to enter the boost charging mode. If the output voltage matches the rated voltage, it is determined to enter the normal charging mode.

[0028] In actual operation, the Battery Management System (BMS) compares the output voltage of the charging pile with the rated voltage of the power battery. If the output voltage of the charging pile (450V~550V) is lower than the rated voltage of the power battery (800V), it is determined that the boost charging mode needs to be activated; if the output voltage of the charging pile matches the rated voltage of the power battery, it directly enters the normal charging mode.

[0029] In step S103, in response to the boost charging mode, the target charging voltage range is calculated based on the real-time status information and output capability information, and a start command is sent to the on-board boost module to raise the voltage input to the charging device to the target charging voltage range.

[0030] In actual operation, in response to the boost charging mode, the target charging voltage range (750V~800V) is calculated based on real-time status and output capacity information. The Battery Management System (BMS) then sends a start command to the on-board boost module to increase the charging pile's output voltage to the target range. During the boost process, a PID algorithm is used to dynamically adjust the boost module's duty cycle to ensure stable output voltage with an adjustment accuracy of ≤±2V.

[0031] The on-board boost module uses a DC / DC circuit, which is directly integrated onto the battery management system (BMS) mainboard. It shares the motor control unit (MCU), sampling, and communication interfaces. The power supply and protection logic can be designed uniformly, and the heat dissipation and structural design can share the thermal management system of the BMS, saving space and cost. It adopts a bidirectional DC-DC converter with an input voltage range of 450V~550V, a maximum output power of ≥200kW (e.g., 250kW), a conversion efficiency of ≥96% (e.g., 96%), and supports a wide range of current output from 50A to 300A. It can quickly respond to BMS commands and achieve stable voltage boost.

[0032] In step S104, the vehicle's charging needs and the status of the power battery are fed back to the charging equipment, and the operating status information transmitted back by the charging equipment is received. In order to adjust the output current of the vehicle boost module according to the status of the power battery during the charging process, the smooth switching from the constant current charging stage to the constant voltage charging stage is completed.

[0033] In some embodiments, it also includes: During the charging process, the real-time status information of the power battery and the working status of the vehicle boost module are monitored. When any parameter in the real-time status information and the working status exceeds the preset safety threshold, the vehicle boost module is triggered to reduce power or shut down for protection.

[0034] In some embodiments, it also includes: When the remaining charge of the power battery rises to the preset charging termination threshold, the on-board boost module is controlled to stop working and a charging stop message is sent to the charging equipment.

[0035] In actual operation, the Battery Management System (BMS) maintains real-time communication with the charging pile via a CAN bus (e.g., CAN FD bus, communication rate ≥500kbps, ensuring real-time data transmission). It can relay vehicle charging requirements (such as target charging current and remaining SOC at charging cutoff) and battery status according to the national standard GB / T 27930 communication protocol, and receive status feedback information from the charging pile. Based on changes in battery temperature and remaining SOC, it dynamically adjusts the output current of the onboard boost module to achieve smooth switching between constant current and constant voltage phases, improving charging efficiency.

[0036] The embodiments in this application are based on the CAN bus architecture, which supports the national standard GB / T 27930 protocol. It can realize real-time communication between the battery management system (BMS) and the charging pile, boost module and other vehicle electronic control units (ECUs) (such as VCU and OBC), ensuring consistent charging logic.

[0037] Furthermore, the battery management system (BMS) can use a 32-bit MCU with an operation frequency of ≥100MHz, built-in charging logic algorithm and safety protection algorithm, receive data from the parameter acquisition module, perform voltage matching judgment, boost control, safety monitoring and fault handling, and can respond to faults and perform protection actions within 10ms to ensure that the charging process is safe, stable and efficient.

[0038] Specifically, during the charging process, the Battery Management System (BMS) monitors the individual cell voltage, total voltage, temperature of the power battery, and the operating status of the boost module (such as input / output voltage, current, and module temperature) in real time. When overvoltage, overcurrent, overtemperature, short circuit, or insulation abnormality is detected, protective actions are immediately executed: the charging circuit is cut off or the charging power is reduced, and a stop charging command is sent to the charging station. At the same time, fault information is displayed to the user through the vehicle's instrument panel.

[0039] When the remaining SOC of the power battery reaches a preset cutoff threshold (such as 95%) or the user triggers a stop charging operation, the Battery Management System (BMS) controls the on-board boost module to stop working, completes the charging settlement and communication disconnection processes with the charging pile, and disconnects the high-voltage connection of the charging interface to ensure personnel safety.

[0040] The boost charging control method of the battery management system proposed in this application will be described in detail below through a specific embodiment.

[0041] After the vehicle is connected to a 500V charging pile, the Battery Management System (BMS) collects data through the charging interface, showing that the charging pile output voltage is 480V, the output current is 300A, and the communication protocol version is GB / T 27930-2015. At the same time, it collects data showing that the rated voltage of the power battery is 800V, the current remaining charge SOC value is 30%, the battery temperature is 25℃, and the individual cell voltages are balanced.

[0042] The Battery Management System (BMS) determines that the output voltage (480V) of the charging pile is lower than the rated voltage (800V) of the power battery, and then activates the boost charging mode.

[0043] The battery management system (BMS) calculates the target charging voltage as 780V, sends a start command to the boost module, and controls the boost module to increase the 480V input voltage to 780V. The voltage regulation accuracy is ±1.5V, and the response time is 80ms.

[0044] The Battery Management System (BMS) feeds back the target charging current of 250A to the charging pile via the CAN bus, and the remaining SOC is 95% when charging is cut off. During the charging process, the output current of the vehicle boost module is dynamically adjusted according to the change of the remaining SOC. When the remaining SOC reaches 80%, it switches to constant voltage charging mode.

[0045] During the charging process, the Battery Management System (BMS) monitored the battery temperature in real time, which reached a maximum of 38°C and the single-cell voltage reached a maximum of 4.2V, both of which were within the safe threshold range. The on-board boost module of the Battery Management System (BMS) was working normally without any abnormalities.

[0046] When the remaining SOC of the power battery reaches 95%, the Battery Management System (BMS) controls the on-board boost module to stop working, completes the communication disconnection process with the charging pile, disconnects the high-voltage connection, and the charging ends.

[0047] The boost charging control method for a battery management system proposed in the embodiments of this application has the following beneficial effects: (1) It solves the charging compatibility problem between 500V charging piles and 800V high-voltage platform vehicles, without the need to modify existing charging piles, reducing infrastructure upgrade costs and improving user experience; (2) The boost module is integrated into the BMS for direct control, which has high voltage regulation accuracy, fast response speed, and charging conversion efficiency ≥96%, ensuring high charging efficiency; (3) Built-in multiple safety protection mechanisms, including overvoltage, overcurrent, overtemperature, short circuit protection and insulation monitoring, to fully ensure the safety and reliability of the charging process; (4) The system has a simple structure and can be integrated into the existing vehicle BMS architecture without the need for additional complex equipment, making it easy to mass-produce and promote its application.

[0048] Next, referring to the accompanying drawings, a boost charging control device for a battery management system according to an embodiment of this application is described.

[0049] Figure 2 This is a block diagram of a boost charging control device for a battery management system according to an embodiment of this application.

[0050] like Figure 2 As shown, the boost charging control device 20 of the battery management system includes: a parameter acquisition module 201, a judgment module 202, a boost module 203, and a communication adjustment module 204.

[0051] The parameter acquisition module 201 is used to acquire the output voltage and output capacity information of the charging equipment, as well as the rated voltage and real-time status information of the power battery. The judgment module 202 is used to determine whether to activate the boost charging mode based on the output voltage and rated voltage. The boost module 203 is used to respond to the boost charging mode, calculate the target charging voltage range based on the real-time status information and output capacity information, and send a start command to the on-board boost module to raise the voltage input to the charging equipment to the target charging voltage range. The communication adjustment module 204 is used to feed back the vehicle's charging demand and the power battery status to the charging equipment, and at the same time receive the operating status information returned by the charging equipment, so as to adjust the output current of the on-board boost module according to the power battery status during the charging process, and complete the smooth switch from the constant current charging stage to the constant voltage charging stage.

[0052] In some embodiments, the determination module includes: The output voltage is compared with the rated voltage. If the output voltage is lower than the rated voltage, it is determined to enter the boost charging mode. If the output voltage matches the rated voltage, it is determined to enter the normal charging mode.

[0053] In some embodiments, it also includes: The monitoring and fault handling module is used to monitor the real-time status information of the power battery and the working status of the vehicle boost module during the charging process. When any parameter in the real-time status information and the working status exceeds the preset safety threshold, the vehicle boost module will be triggered to reduce power or shut down for protection.

[0054] In some embodiments, it also includes: The charging termination module is used to control the on-board boost module to stop working and send a charging termination message to the charging equipment when the remaining power of the power battery rises to a preset charging termination threshold.

[0055] It should be noted that the foregoing explanation of the boost charging control method embodiment for the battery management system also applies to the boost charging control device of the battery management system in this embodiment, and will not be repeated here.

[0056] The boost charging control device for a battery management system proposed in the embodiments of this application has the following beneficial effects: (1) It solves the charging compatibility problem between 500V charging piles and 800V high-voltage platform vehicles, without the need to modify existing charging piles, reducing infrastructure upgrade costs and improving user experience; (2) The boost module is integrated into the BMS for direct control, which has high voltage regulation accuracy, fast response speed, and charging conversion efficiency ≥96%, ensuring high charging efficiency; (3) Built-in multiple safety protection mechanisms, including overvoltage, overcurrent, overtemperature, short circuit protection and insulation monitoring, to fully ensure the safety and reliability of the charging process; (4) The system has a simple structure and can be integrated into the existing vehicle BMS architecture without the need for additional complex equipment, making it easy to mass-produce and promote its application.

[0057] Figure 3 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.

[0058] The electronic device may include: a memory 301, a processor 302, and a computer program stored on the memory 301 and capable of running on the processor 302.

[0059] When the processor 302 executes the program, it implements the boost charging control method of the battery management system provided in the above embodiments.

[0060] Furthermore, electronic devices also include: Communication interface 303 is used for communication between memory 301 and processor 302.

[0061] The memory 301 is used to store computer programs that can run on the processor 302.

[0062] The memory 301 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0063] If the memory 301, processor 302, and communication interface 303 are implemented independently, then the communication interface 303, memory 301, and processor 302 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0064] Optionally, in a specific implementation, if the memory 301, processor 302, and communication interface 303 are integrated on a single chip, then the memory 301, processor 302, and communication interface 303 can communicate with each other through an internal interface.

[0065] Processor 302 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0066] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the boost charging control method of the battery management system described above.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0070] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0071] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0072] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0073] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0074] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A boost charging control method for a battery management system, characterized in that, Includes the following steps: Collect the output voltage and output capacity information of the charging equipment, and collect the rated voltage and real-time status information of the power battery; Determine whether to activate the boost charging mode based on the output voltage and the rated voltage; In response to the boost charging mode, the target charging voltage range is calculated based on the real-time status information and the output capability information, and a start command is sent to the vehicle boost module to boost the voltage input to the charging device to the target charging voltage range. The system feeds back the vehicle's charging needs and the status of the power battery to the charging equipment, and simultaneously receives the operating status information returned by the charging equipment. During the charging process, the system adjusts the output current of the on-board boost module according to the status of the power battery, thus completing a smooth switch from the constant current charging stage to the constant voltage charging stage.

2. The boost charging control method for the battery management system according to claim 1, characterized in that, The step of determining whether to activate the boost charging mode based on the output voltage and the rated voltage includes: The output voltage is compared with the rated voltage. If the output voltage is lower than the rated voltage, the boost charging mode is activated. If the output voltage matches the rated voltage, the normal charging mode is activated.

3. The boost charging control method for the battery management system according to claim 1, characterized in that, Also includes: During the charging process, the real-time status information of the power battery and the working status of the vehicle boost module are monitored in real time. When any parameter of the real-time status information and the working status exceeds the preset safety threshold, the vehicle boost module is triggered to reduce power or shut down for protection.

4. The boost charging control method for the battery management system according to claim 1, characterized in that, Also includes: When the remaining charge of the power battery rises to a preset charging termination threshold, the on-board boost module is controlled to stop working and a charging termination message is sent to the charging equipment.

5. A boost charging control device for a battery management system, characterized in that, include: The parameter acquisition module is used to acquire the output voltage and output capacity information of the charging equipment, as well as the rated voltage and real-time status information of the power battery. The determination module is used to determine whether to activate the boost charging mode based on the output voltage and the rated voltage. A boost module is used to respond to the boost charging mode, calculate the target charging voltage range based on the real-time status information and the output capability information, and send a start command to the vehicle boost module to boost the voltage input to the charging device to the target charging voltage range. The communication adjustment module is used to feed back the vehicle's charging needs and the status of the power battery to the charging equipment, and at the same time receive the operating status information returned by the charging equipment, so as to adjust the output current of the on-board boost module according to the status of the power battery during the charging process, and complete the smooth switching from the constant current charging stage to the constant voltage charging stage.

6. The boost charging control device for the battery management system according to claim 5, characterized in that, The determination module includes: The output voltage is compared with the rated voltage. If the output voltage is lower than the rated voltage, the boost charging mode is activated. If the output voltage matches the rated voltage, the normal charging mode is activated.

7. The boost charging control device for the battery management system according to claim 5, characterized in that, Also includes: The monitoring and fault handling module is used to monitor the real-time status information of the power battery and the working status of the vehicle boost module during the charging process. When any parameter of the real-time status information and the working status exceeds a preset safety threshold, the power reduction or shutdown protection action of the vehicle boost module is triggered.

8. The boost charging control device for the battery management system according to claim 5, characterized in that, Also includes: The charging termination module is used to control the on-board boost module to stop working and send a charging termination message to the charging equipment when the remaining power of the power battery rises to a preset charging termination threshold.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the boost charging control method of the battery management system as described in any one of claims 1-4.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the boost charging control method of the battery management system as described in any one of claims 1-4.

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