BMS large current active balancing calibration method and device

Abstract

The present invention discloses a BMS large current active equalization calibration method and device. The energy storage battery group includes a plurality of single energy storage batteries. The calibration method includes the following steps: when actively equalizing the energy storage battery group, the real-time temperature value, real-time voltage value and high-rate charge and discharge times of each single energy storage battery in the current detection cycle are obtained; based on the real-time temperature value and high-rate charge and discharge times of the single energy storage battery, the real-time voltage value is calibrated to obtain the real-time voltage calibration value of the current detection cycle; in the next detection cycle, the corresponding single energy storage battery is actively balanced and controlled based on the real-time voltage calibration value of the current detection cycle. The voltage detection value is calibrated by the energy storage battery temperature and high-rate charge and discharge times obtained in the current detection cycle, which improves the voltage and SOC detection accuracy of each single energy storage battery, and improves the accuracy, reliability and safety of the active equalization strategy.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage control, and in particular to a BMS large current active balancing calibration method and device. Background Art

[0002] Battery Management System (BMS) is a key technology in electric vehicles and energy storage systems. It is responsible for monitoring, protecting and managing the working status of the battery pack to ensure the safe, reliable and efficient operation of the battery pack. The main functions of BMS include battery status monitoring, battery status estimation, battery management strategy, and fault diagnosis and protection. Battery balancing is another important function of BMS. It reduces the voltage difference between battery cells in an active or passive way to improve the overall performance and life of the battery pack. Active balancing transfers the energy of high-voltage batteries to low-voltage batteries through energy transfer, while passive balancing consumes the energy of high-voltage batteries through resistor discharge. Although active balancing technology is slightly more expensive, it provides faster balancing speed and higher energy utilization, which is of great significance for improving the efficiency of battery pack use and extending battery life. Active balancing technology can realize the transfer of energy between battery cells, instead of dissipating energy in the form of heat through resistance like passive balancing, thereby improving the utilization efficiency of electric energy.

[0003] If the temperature value of each single energy storage battery in the energy storage battery pack is too high or too low, it will have a significant impact on the voltage detection of the single energy storage battery. When the battery temperature is too high, the acceleration of the internal chemical reaction may cause the battery voltage to temporarily increase, resulting in the problem of the detected battery voltage value being instantaneously high; in a low temperature environment, the internal resistance of the battery will increase, and the battery voltage response will also slow down, which may cause the voltage detection value to be instantaneously low. The above-mentioned high or low battery temperature causes errors in the battery voltage value detection results, affecting the BMS's accurate estimation of the battery state of charge (SOC) during the active balancing process, and then leading to errors in the active balancing control strategy. In addition, during high-rate charging and discharging, the polarization phenomenon of the battery is more obvious, which may cause the battery voltage detection value to be high, because the increase in polarization voltage will increase the battery terminal voltage; if the high rate of the single energy storage battery is too much, it will cause the voltage detection value obtained by its detection to be instantaneously or short-term falsely high, affecting the detection accuracy. Summary of the invention

[0004] The purpose of the embodiment of the present invention is to provide a BMS large current active balancing calibration method and device, which improves the voltage detection accuracy of each single energy storage battery by calibrating the voltage detection value based on the temperature and high-rate charge and discharge times obtained in the current detection cycle, thereby improving the reliability and safety of the active balancing strategy, and providing more accurate data support for the energy management of the energy storage battery pack.

[0005] In order to solve the above technical problems, a first aspect of an embodiment of the present invention provides a BMS large current active equalization calibration method, wherein the energy storage battery pack includes a plurality of single energy storage batteries, each of which is provided with a temperature sensor, and comprises the following steps:

[0006] When actively balancing the energy storage battery group, obtaining the real-time temperature value, real-time voltage value and high-rate charge and discharge times value of each single energy storage battery in the current detection cycle;

[0007] Based on the real-time temperature value of the single energy storage battery and the high-rate charge and discharge times, calibrate the real-time voltage value thereof to obtain a real-time voltage calibration value of the current detection cycle;

[0008] In the next detection cycle, active balancing control is performed on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle.

[0009] Furthermore, based on the real-time temperature value of the single energy storage battery and the high-rate charge and discharge times, the real-time voltage value is calibrated to obtain the real-time voltage calibration value of the current detection cycle, including:

[0010] Compare the real-time temperature value with an upper temperature threshold and a lower temperature threshold respectively;

[0011] When the real-time temperature value is greater than the upper temperature threshold, based on the difference between the real-time temperature value and the upper temperature threshold, combined with the high-rate charge and discharge times value, the real-time voltage value is calibrated downward to obtain a first real-time voltage calibration value;

[0012] When the real-time temperature value is less than the lower limit of the temperature threshold, the real-time voltage value is calibrated upward based on the difference between the real-time temperature value and the temperature and the lower limit, combined with the high-rate charge and discharge number value, to obtain a second real-time voltage calibration value.

[0013] Further, when the real-time temperature value is greater than the upper temperature threshold, the calculation formula of the first real-time voltage calibration value is:

[0014]

[0015] Among them, V c1 is the calibration value of the real-time voltage value, V m is the real-time voltage value, λ1 is the calibration coefficient of the high temperature to voltage of the single energy storage battery, T m is the real-time temperature value, T MAXis the upper limit of the temperature threshold, λ2 is the calibration coefficient of the high-rate charge and discharge times to the voltage in the single energy storage battery, N m is the number of high rate charge and discharge times, N MAX It is the upper limit of reasonable times of high rate charge and discharge.

[0016] Furthermore, each of the single energy storage batteries is provided with a first temperature sensor and a second temperature sensor;

[0017] The first temperature sensor is arranged inside the battery cell of the single energy storage battery, and is used to obtain the real-time temperature value inside the battery cell of the single energy storage battery;

[0018] The second temperature sensor is arranged on the outer wall surface of the single energy storage battery, and is used to obtain the real-time temperature value of the surrounding environment of the single energy storage battery;

[0019] The calculation formula of the first real-time voltage calibration value is:

[0020]

[0021] Among them, λ 11 is the calibration coefficient of the high temperature inside the cell of the single energy storage battery to the voltage, T m1 is the real-time temperature value inside the single energy storage battery cell, λ 12 is the calibration coefficient of the high temperature of the side wall to the voltage in the single energy storage battery, T m2 It is the real-time temperature value of the environment surrounding the single energy storage battery.

[0022] Further, when the real-time temperature value is less than the lower limit of the temperature threshold, the calculation formula of the second real-time voltage calibration value is:

[0023]

[0024] Among them, V c2 is the calibration value of the real-time voltage value, V m is the real-time voltage value, ω1 is the calibration coefficient of the low temperature to voltage of the single energy storage battery, T m is the real-time temperature value, T MIN is the upper limit of the temperature threshold, ω2 is the calibration coefficient of the high-rate charge and discharge times to the voltage in the single energy storage battery, N m is the high rate charge and discharge times, N MAX It is the upper limit of reasonable times of high rate charge and discharge.

[0025] Furthermore, each of the single energy storage batteries is provided with a first temperature sensor and a second temperature sensor;

[0026] The first temperature sensor is arranged inside the battery cell of the single energy storage battery, and is used to obtain the real-time temperature value inside the battery cell of the single energy storage battery;

[0027] The second temperature sensor is arranged on the outer wall surface of the single energy storage battery, and is used to obtain the real-time temperature value of the surrounding environment of the single energy storage battery;

[0028] The calculation formula of the second real-time voltage calibration value is:

[0029]

[0030] Among them, ω 11 is the calibration coefficient of the low temperature inside the cell of the single energy storage battery to the voltage, T m1 is the real-time temperature value inside the single energy storage battery cell, ω 12 is the calibration coefficient of the low temperature of the side wall to the voltage in the single energy storage battery, T m2 It is the real-time temperature value of the environment surrounding the single energy storage battery.

[0031] Furthermore, in the next detection cycle, active balancing control is performed on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle, including:

[0032] Calculating the state of charge calibration value of the single energy storage battery in the current detection cycle based on the real-time voltage calibration value of the current detection cycle;

[0033] Determine an active balancing strategy for the energy storage battery group in the next detection cycle based on a state of charge calibration value of each of the single energy storage batteries in the energy storage battery group;

[0034] Based on the active balancing strategy of the next detection cycle, active balancing control is performed on the energy storage battery group.

[0035] Accordingly, a second aspect of an embodiment of the present invention provides a BMS high current active equalization calibration device, wherein the energy storage battery pack includes a plurality of single energy storage batteries, each of which is provided with a temperature sensor, including:

[0036] A data detection module, which is used to obtain the real-time temperature value, real-time voltage value and high-rate charge and discharge times of each single energy storage battery in the current detection cycle when actively balancing the energy storage battery group;

[0037] A calibration calculation module, which is used to calibrate the real-time voltage value of the single energy storage battery based on the real-time temperature value of the single energy storage battery and the high-rate charge and discharge number value, so as to obtain the real-time voltage calibration value of the current detection cycle;

[0038] The balancing control module is used to perform active balancing control on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle in the next detection cycle.

[0039] Accordingly, a third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the above-mentioned BMS large current active balancing calibration method.

[0040] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the above-mentioned BMS large current active balancing calibration method.

[0041] The above technical solution of the embodiment of the present invention has the following beneficial technical effects:

[0042] By calibrating the voltage detection value based on the temperature and high-rate charge and discharge times obtained in the current detection cycle, the voltage detection accuracy of each single energy storage battery is improved, thereby improving the reliability and safety of the active balancing strategy, providing more accurate data support for the energy management of the energy storage battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart of a BMS large current active balancing calibration method provided by an embodiment of the present invention;

[0044] Figure 2 It is a module block diagram of a BMS large current active balancing calibration device provided in an embodiment of the present invention.

[0045] Reference numerals:

[0046] 1. Data detection module, 2. Calibration calculation module, 3. Balance control module. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0048] Please refer to Figure 1 The first aspect of the embodiment of the present invention provides a BMS large current active equalization calibration method, wherein the energy storage battery pack includes a plurality of single energy storage batteries, each of which is provided with a temperature sensor, and includes the following steps:

[0049] Step S100, when actively balancing the energy storage battery group, obtain the real-time temperature value, real-time voltage value and high-rate charge and discharge times value of each single energy storage battery in the current detection cycle.

[0050] Step S200, based on the real-time temperature value and the high-rate charge and discharge times of the single energy storage battery, calibrate the real-time voltage value thereof to obtain the real-time voltage calibration value of the current detection cycle.

[0051] Step S300: in the next detection cycle, active balancing control is performed on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle.

[0052] The above technical solution can accurately monitor and manage the status of each single cell in the energy storage battery pack to ensure the overall performance and life of the battery pack. First, by acquiring the voltage, temperature and state of charge of the single cell in real time, this method can accurately evaluate the actual condition of each battery cell. Then, by dynamically calibrating the voltage in combination with temperature and SOC, the accuracy of voltage measurement can be significantly improved, thereby avoiding the overall performance degradation caused by inconsistent voltages between battery cells. In addition, this method uses the calibrated voltage value for active balancing control in the next detection cycle, which helps to reduce inconsistencies within the battery pack, improve the charging and discharging efficiency and service life of the battery pack, and also reduces the risk of thermal runaway of the system.

[0053] Specifically, in step S200, based on the real-time temperature value and the high-rate charge and discharge times of the single energy storage battery, the real-time voltage value is calibrated to obtain the real-time voltage calibration value of the current detection cycle, including:

[0054] Step S210, comparing the real-time temperature value with the upper temperature threshold and the lower temperature threshold respectively.

[0055] When selecting the upper and lower temperature thresholds for battery temperatures that are too high or too low, it is necessary to consider the chemical stability of the battery material, the thermal tolerance of the battery design, and the safety and performance requirements of the battery in actual use. For example, for lithium-ion batteries, it is generally believed that their ideal operating temperature range is between 15°C and 35°C. In this case, the upper temperature threshold can be set to 50°C, and the lower temperature threshold can be set to -15°C accordingly.

[0056] Step S220, when the real-time temperature value is greater than the upper temperature threshold, based on the difference between the real-time temperature value and the upper temperature threshold and in combination with the high-rate charge and discharge times, the real-time voltage value is calibrated downward to obtain a first real-time voltage calibration value.

[0057] The above steps calibrate the battery voltage by monitoring the temperature in real time and comparing it with the preset threshold value, ensuring the accuracy of the voltage reading under high temperature conditions, dynamically adapting to environmental changes, and reducing the voltage detection error caused by excessive temperature, thereby improving the accuracy and reliability of the battery management system.

[0058] Step S230, when the real-time temperature value is less than the lower limit of the temperature threshold, based on the difference between the real-time temperature value and the lower limit, combined with the high-rate charge and discharge times value, the real-time voltage value is calibrated upward to obtain a second real-time voltage calibration value.

[0059] By accurately monitoring the real-time temperature and comparing it with the set lower threshold, the battery voltage is corrected to address the problem of low voltage readings that may occur in low temperature environments. It can respond to temperature changes in real time and compensate for the impact of low temperature on battery performance by adjusting the voltage reading, thereby ensuring that the battery can provide accurate voltage information under different temperature conditions.

[0060] In one implementation of the embodiment of the present invention, when the real-time temperature value is greater than the upper limit of the temperature threshold, the calculation formula of the first real-time voltage calibration value is:

[0061]

[0062] Among them, V c1 is the calibration value of the real-time voltage value, V m is the real-time voltage value, λ1 is the calibration coefficient of the high temperature of the single energy storage battery to the voltage, T m is the real-time temperature value, T MAX is the upper limit of the temperature threshold, λ2 is the calibration coefficient of the high-rate charge and discharge times of the single energy storage battery to the voltage, N m N is the number of high rate charge and discharge times. MAX It is the upper limit of reasonable times of high rate charge and discharge.

[0063] N m -N MAX It indicates the difference between the high-rate charge and discharge times of the single energy storage battery and the upper limit of the reasonable high-rate charge and discharge times. Indicates that when N m >N MAX The value is 1 when N m ≤N MAX The hour value is 0.

[0064] Furthermore, when N m >N MAX hour, The result is N m -N MAX ; When N m ≤N MAXhour, The result is 0. That is, when N m ≤N MAX When the voltage detection value is calibrated, the influence of high-rate charge and discharge times can be ignored.

[0065] Furthermore, each single energy storage battery is provided with a first temperature sensor and a second temperature sensor; the first temperature sensor is arranged inside the battery cell of the single energy storage battery, and is used to obtain the real-time temperature value inside the battery cell of the single energy storage battery; the second temperature sensor is arranged on the outer wall surface of the single energy storage battery, and is used to obtain the real-time temperature value of the surrounding environment of the single energy storage battery.

[0066] By considering the temperature difference between the battery cell and the external environment, the impact of high temperature on the battery voltage can be more accurately reflected, and the battery voltage can be calibrated to improve the accuracy of voltage detection; by dual monitoring of the internal and external temperatures of the battery, more comprehensive data support is provided to the battery management system, which helps to more accurately evaluate the working status and health status of the battery; in addition, accurate temperature monitoring and voltage calibration help optimize the battery charging and discharging strategy to avoid reduced battery performance or shortened battery life due to abnormal temperature.

[0067] Accordingly, the calculation formula of the first real-time voltage calibration value is:

[0068]

[0069] Among them, λ 11 T is the calibration coefficient of the internal high temperature of the battery cell to the voltage in the single energy storage battery. m1 is the real-time temperature value inside the single energy storage battery cell, λ 12 is the calibration coefficient of the high temperature of the side wall to the voltage in the single energy storage battery, T m2 It is the real-time temperature value of the environment around the single energy storage battery.

[0070] In one implementation of the embodiment of the present invention, when the real-time temperature value is less than the lower limit of the temperature threshold, the calculation formula of the second real-time voltage calibration value is:

[0071]

[0072] Among them, V c2 is the calibration value of the real-time voltage value, V m is the real-time voltage value, ω1 is the voltage calibration coefficient of the low temperature in the single energy storage battery, T m is the real-time temperature value, T MIN is the upper limit of the temperature threshold, ω2 is the calibration coefficient of the state of charge to voltage in the single energy storage battery, N m N is the number of high rate charge and discharge times. MAXIt is the upper limit of reasonable times of high rate charge and discharge.

[0073] Furthermore, each single energy storage battery is provided with a first temperature sensor and a second temperature sensor; the first temperature sensor is arranged inside the battery cell of the single energy storage battery, and is used to obtain the real-time temperature value inside the battery cell of the single energy storage battery; the second temperature sensor is arranged on the outer wall surface of the single energy storage battery, and is used to obtain the real-time temperature value of the surrounding environment of the single energy storage battery.

[0074] The calculation formula of the second real-time voltage calibration value is:

[0075]

[0076] Among them, ω 11 T is the calibration coefficient of the low temperature inside the cell to the voltage in the single energy storage battery. m1 is the real-time temperature value inside the single energy storage battery cell, ω 12 is the calibration coefficient of the low temperature of the side wall to the voltage in the single energy storage battery, T m2 It is the real-time temperature value of the environment around the single energy storage battery.

[0077] In addition, in step S300, in the next detection cycle, active balancing control is performed on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle, including:

[0078] Step S310, based on the real-time voltage calibration value of the current detection cycle, calculate the charge state calibration value of the single energy storage battery in the current detection cycle.

[0079] Step S320, based on the state of charge calibration value of each single energy storage battery in the energy storage battery group, determine the active balancing strategy of the energy storage battery group in the next detection cycle.

[0080] Step S330, based on the active balancing strategy of the next detection cycle, active balancing control is performed on the energy storage battery group.

[0081] After obtaining the precise voltage value of each single energy storage battery, the calibration value of the state of charge is further obtained, and then the active balancing strategy is determined based on the precise value of the state of charge. The above method greatly improves the effectiveness and accuracy of the active balancing strategy of the energy storage battery pack.

[0082] Accordingly, please refer to Figure 2 The second aspect of the embodiment of the present invention provides a BMS large current active equalization calibration device, the energy storage battery pack includes a plurality of single energy storage batteries, each single energy storage battery is provided with a temperature sensor, including:

[0083] Data detection module 1, which is used to obtain the real-time temperature value, real-time voltage value and high-rate charge and discharge times of each single energy storage battery in the current detection cycle when actively balancing the energy storage battery group;

[0084] The calibration calculation module 2 is used to calibrate the real-time voltage value of the single energy storage battery based on the real-time temperature value and the high-rate charge and discharge number value, so as to obtain the real-time voltage calibration value of the current detection cycle;

[0085] The balancing control module 3 is used to perform active balancing control on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle in the next detection cycle.

[0086] The above-mentioned functional modules can further refine the functional units according to the steps of the method to execute the refined steps of the above-mentioned calibration method.

[0087] Accordingly, a third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the above-mentioned BMS large current active balancing calibration method.

[0088] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the above-mentioned BMS large current active balancing calibration method.

[0089] The embodiment of the present invention aims to protect a BMS large current active balancing calibration method and device. The energy storage battery group includes a plurality of single energy storage batteries, each of which is provided with a temperature sensor. The calibration method includes the following steps: when actively balancing the energy storage battery group, the real-time temperature value, real-time voltage value and high-rate charge and discharge times of each single energy storage battery in the current detection cycle are obtained; based on the real-time temperature value and high-rate charge and discharge times of the single energy storage battery, the real-time voltage value is calibrated to obtain the real-time voltage calibration value of the current detection cycle; in the next detection cycle, the corresponding single energy storage battery is actively balanced and controlled based on the real-time voltage calibration value of the current detection cycle. The above technical scheme has the following effects:

[0090] By calibrating the voltage detection value based on the temperature and high-rate charge and discharge times obtained in the current detection cycle, the voltage detection accuracy of each single energy storage battery is improved, thereby improving the reliability and safety of the active balancing strategy, providing more accurate data support for the energy management of the energy storage battery pack.

[0091] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0092] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0093] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A BMS high current active balancing calibration method, characterized in that: The energy storage battery pack includes a plurality of single energy storage batteries, each of which is provided with a temperature sensor, and includes the following steps: When actively balancing the energy storage battery group, obtaining the real-time temperature value, real-time voltage value and high-rate charge and discharge times value of each single energy storage battery in the current detection cycle; Based on the real-time temperature value of the single energy storage battery and the high-rate charge and discharge times, calibrate the real-time voltage value thereof to obtain a real-time voltage calibration value of the current detection cycle; In the next detection cycle, active balancing control is performed on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle; The real-time voltage value of the single energy storage battery is calibrated based on the real-time temperature value of the single energy storage battery and the high-rate charge and discharge times to obtain the real-time voltage calibration value of the current detection cycle, including: Comparing the real-time temperature value with an upper temperature threshold and a lower temperature threshold respectively; When the real-time temperature value is greater than the upper temperature threshold, based on the difference between the real-time temperature value and the upper temperature threshold, combined with the high-rate charge and discharge times value, the real-time voltage value is calibrated downward to obtain a first real-time voltage calibration value; When the real-time temperature value is less than the lower limit of the temperature threshold, the real-time voltage value is calibrated upward based on the difference between the real-time temperature value and the temperature and the lower limit, combined with the high-rate charge and discharge number value, to obtain a second real-time voltage calibration value.

2. The BMS high current active equalization calibration method according to claim 1, characterized in that: When the real-time temperature value is greater than the upper temperature threshold, the calculation formula of the first real-time voltage calibration value is: ； in, is the calibration value of the real-time voltage value, is the real-time voltage value, is the calibration coefficient of the high temperature to voltage in the single energy storage battery, is the real-time temperature value, is the upper temperature threshold, is the calibration coefficient of the high rate charge and discharge times to the voltage in the single energy storage battery, is the high rate charge and discharge times value, The upper limit of reasonable times of high rate charge and discharge, Indicates when The value is 1 when The hour value is 0.

3. The BMS high current active equalization calibration method according to claim 2, characterized in that: Each of the single energy storage batteries is provided with a first temperature sensor and a second temperature sensor; The first temperature sensor is arranged inside the battery cell of the single energy storage battery, and is used to obtain the real-time temperature value inside the battery cell of the single energy storage battery; The second temperature sensor is arranged on the outer wall surface of the single energy storage battery, and is used to obtain the real-time temperature value of the surrounding environment of the single energy storage battery; The calculation formula of the first real-time voltage calibration value is: ； in, is the calibration coefficient of the high temperature inside the cell of the single energy storage battery to the voltage, is the real-time temperature value inside the single energy storage battery cell, is the calibration coefficient of the high temperature of the side wall to the voltage in the single energy storage battery, It is the real-time temperature value of the environment surrounding the single energy storage battery.

4. The BMS high current active equalization calibration method according to claim 1, characterized in that: When the real-time temperature value is less than the lower limit of the temperature threshold, the calculation formula of the second real-time voltage calibration value is: ； Among them, among them, is the calibration value of the real-time voltage value, is the real-time voltage value, is the calibration coefficient of low temperature to voltage in the single energy storage battery, is the real-time temperature value, is the upper temperature threshold, is the calibration coefficient of the high rate charge and discharge times to the voltage in the single energy storage battery, is the high rate charge and discharge times value, The upper limit of reasonable times of high rate charge and discharge, Indicates when The value is 1 when The hour value is 0.

5. The BMS high current active equalization calibration method according to claim 4, characterized in that: Each of the single energy storage batteries is provided with a first temperature sensor and a second temperature sensor; The first temperature sensor is arranged inside the battery cell of the single energy storage battery, and is used to obtain the real-time temperature value inside the battery cell of the single energy storage battery; The second temperature sensor is arranged on the outer wall surface of the single energy storage battery, and is used to obtain the real-time temperature value of the surrounding environment of the single energy storage battery; The calculation formula of the second real-time voltage calibration value is: ； in, is the calibration coefficient of the low temperature inside the cell of the single energy storage battery to the voltage, is the real-time temperature value inside the single energy storage battery cell, is the calibration coefficient of the low temperature of the side wall to the voltage in the single energy storage battery, It is the real-time temperature value of the environment surrounding the single energy storage battery.

6. The BMS high current active balancing calibration method according to any one of claims 1 to 5, characterized in that: In the next detection cycle, active balancing control is performed on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle, including: Calculating the state of charge calibration value of the single energy storage battery in the current detection cycle based on the real-time voltage calibration value of the current detection cycle; Determine an active balancing strategy for the energy storage battery group in the next detection cycle based on a state of charge calibration value of each of the single energy storage batteries in the energy storage battery group; Based on the active balancing strategy of the next detection cycle, active balancing control is performed on the energy storage battery group.

7. A BMS high current active balancing calibration device, characterized in that: The energy storage battery pack is calibrated based on the BMS large current active equalization calibration method described in any one of claims 1 to 6. The energy storage battery pack includes a plurality of single energy storage batteries, each of which is provided with a temperature sensor, including: A data detection module, which is used to obtain the real-time temperature value, real-time voltage value and high-rate charge and discharge times of each single energy storage battery in the current detection cycle when actively balancing the energy storage battery group; A calibration calculation module, which is used to calibrate the real-time voltage value of the single energy storage battery based on the real-time temperature value of the single energy storage battery and the high-rate charge and discharge number value, so as to obtain the real-time voltage calibration value of the current detection cycle; The balancing control module is used to perform active balancing control on the corresponding single energy storage battery based on the real-time voltage calibration value of the current detection cycle in the next detection cycle.

8. An electronic device, characterized in that: include: at least one processor; And a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the BMS large current active balancing calibration method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the instructions are executed by the processor, the BMS large current active balancing calibration method as described in any one of claims 1-6 is implemented.

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