New energy vehicle battery protection method and new energy vehicle battery protection system

Abstract

The invention discloses a new energy vehicle battery protection method and a new energy vehicle battery protection system, and particularly relates to the technical field of battery charging protection. Comprising a battery pack monomer division module, a battery monomer data acquisition module, a battery monomer charging heat management data processing module, a battery heat dissipation state management module, a battery charging performance comprehensive evaluation module and a battery charging performance abnormity early warning module, according to the method, the battery state data of each single battery of the target new energy vehicle is acquired through the integrated high-precision sensor installed on the single battery, the battery charging heat management optimization index and the battery heat dissipation state monitoring index are calculated, the battery charging performance evaluation coefficient is further calculated, and the battery charging performance is evaluated through real-time acquisition and analysis of parameters. And multi-parameter fusion processing is carried out in combination with an intelligent algorithm, so that intelligent management of the charging process and the heat dissipation state of the battery is realized, the battery management efficiency of the new energy vehicle is improved, and the safety of the new energy vehicle is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery charging protection, and more specifically, to a new energy vehicle battery protection method and a new energy vehicle battery protection system. Background Art

[0002] One of the core technologies of new energy vehicles lies in its battery system, which is directly related to the vehicle's range, safety performance and service life. In recent years, new energy vehicle safety accidents caused by battery failure have occurred frequently, including safety accidents caused by battery thermal runaway, overcharging and over-discharging, which seriously affect user experience and the brand image of new energy vehicles.

[0003] In this context, new energy vehicle battery management technology has achieved real-time monitoring of battery status and reduced battery failure rate by integrating advanced sensor networks and data analysis algorithms. Effective battery safety testing can not only improve the efficiency and accuracy of new energy vehicle battery performance testing, but also extend the battery life, improve the vehicle's endurance, and reduce users' maintenance costs.

[0004] However, there are still some shortcomings in its actual use. For example, the existing battery protection method for new energy vehicles monitors key parameters of the battery, such as voltage, current, and temperature, and compares them with the limit values ​​to determine whether there are safety hazards in the battery system. This method based on comparing a single parameter limit has the problems of delayed response and insufficient accuracy, and lacks a multi-dimensional comprehensive evaluation of charging safety performance.

[0005] At present, the evaluation standards of battery charging performance of various new energy vehicle brands are not the same. In terms of thermal monitoring of battery cell charging, the evaluation results of charging efficiency, heat dissipation efficiency and other indicators may vary greatly among different brands, and there is a lack of unified evaluation standards for thermal management of battery charging and heat dissipation processes. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of the present invention provide a new energy vehicle battery protection method and a new energy vehicle battery protection system, which are used to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the present invention provides the following technical solution: a new energy vehicle battery protection system, comprising: Battery pack cell division module: used to obtain the number of battery cell distribution of the target new energy vehicle battery pack and number each battery cell.

[0008] Battery cell data acquisition module: used to collect battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell. The battery cell data acquisition module includes a battery charging protection data acquisition unit and a battery heat dissipation status data acquisition unit.

[0009] Battery cell charging thermal management data processing module: used to receive the battery status data transmitted by the battery cell data acquisition module, calculate the battery charging thermal management optimization index of each battery cell of the target new energy vehicle according to the battery charging protection data acquisition unit, and provide battery charging diagnostic information for users.

[0010] Battery heat dissipation status management module: used to receive the battery status data transmitted by the battery cell data acquisition module, calculate the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle according to the battery heat dissipation status data acquisition unit, and provide the user with battery heat dissipation status information.

[0011] Battery charging performance comprehensive evaluation module: used to calculate the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle based on the battery charging thermal management optimization index and battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle.

[0012] Battery charging performance abnormal warning module: used to obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, compare it with the preset battery charging performance evaluation coefficient, and process it.

[0013] Preferably, the battery pack monomer division module is specifically: Obtain the number of battery cells distributed in the target new energy vehicle battery pack, and number each battery cell of the target new energy vehicle in sequence as 1, 2,... according to the number of battery cells distributed in the target new energy vehicle battery pack. ,... .

[0014] Preferably, the battery cell data acquisition module is specifically: Battery charging protection data acquisition unit: The integrated high-precision sensors installed on the battery cells collect the charging efficiency, gas concentration, and charging interval of each battery cell of the target new energy vehicle, which are marked as , , ,in =1,2,... , Expressed as The number of each battery cell; Battery heat dissipation status data acquisition unit: The integrated high-precision sensor installed on the battery cell collects the heat dissipation efficiency, cooling fan speed, and temperature of each battery cell of the target new energy vehicle, which are marked as , , .

[0015] Preferably, the calculation formula of the battery charging thermal management optimization index is:

[0016] in, Expressed as Battery charging thermal management optimization index for each battery cell, Expressed as The charging efficiency of each battery cell, Expressed as The gas concentration of each battery cell, Expressed as the preset gas concentration, Expressed as The charging interval of each battery cell, Expressed as the number of battery cells; The battery charging thermal management optimization index of each battery cell of the target new energy vehicle is compared with the preset battery charging thermal management optimization index. If the battery charging thermal management optimization index of a battery cell is greater than the preset battery charging thermal management optimization index, it indicates that there is an abnormality in the battery charging of the battery cell, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that there is no abnormality in the battery charging of the battery cell.

[0017] Preferably, the battery heat dissipation status management module is specifically: Step S01: Substitute the cooling fan speed and temperature of each battery cell of the target new energy vehicle into the formula:

[0018] in, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as The temperature of each battery cell, Indicates the preset temperature, Indicates the maximum speed of the cooling fan. Expressed as The cooling fan speed of each battery cell, Expressed as a natural constant; Step S02: The calculation formula of the battery heat dissipation status monitoring index is:

[0019] in, Expressed as Battery heat dissipation status monitoring index of each battery cell, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as The heat dissipation efficiency of each battery cell; Step S03: Compare the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle with the preset battery heat dissipation status monitoring index. If the battery heat dissipation status monitoring index of a battery cell is greater than the preset battery heat dissipation status monitoring index, it indicates that the battery heat dissipation status of the battery cell does not meet expectations, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that the battery heat dissipation status of the battery cell meets expectations.

[0020] Preferably, the heat dissipation efficiency is specifically: Step S01: Extract the specific heat capacity, mass, and heat transfer coefficient of each battery cell of the target new energy vehicle through the detailed information of the battery provided on the official website of the target new energy vehicle, and mark them as , , ; Step S02: Calculate the heat that can be absorbed by each battery cell:

[0021] in, Expressed as The amount of heat that can be absorbed by a battery cell is Expressed as The specific heat capacity of a battery cell, Expressed as The mass of a battery cell, Expressed as The temperature of each battery cell, Expressed as the initial temperature of the battery cell; Step S03: The current and internal resistance of each battery cell of the target new energy vehicle are collected by installing an integrated high-precision sensor on the battery cell, and marked as , ; Step S04: The heat dissipation efficiency is calculated as follows:

[0022] in, Expressed as The heat dissipation efficiency of each battery cell, Expressed as The current of each battery cell, Expressed as The internal resistance of each battery cell, Expressed as Charging time of each battery cell, Expressed as The heat transfer coefficient of a battery cell.

[0023] Preferably, the calculation formula of the battery charging performance evaluation coefficient is:

[0024] in, Expressed as The battery charging performance evaluation coefficient of each battery cell, Expressed as Battery charging thermal management optimization index for each battery cell, Expressed as Battery heat dissipation status monitoring index of each battery cell, Expressed as the number of battery cells, Expressed as a natural constant.

[0025] Preferably, the battery charging performance abnormality warning module is specifically: Obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, and compare it with the preset battery charging performance evaluation coefficient. If the battery charging performance evaluation coefficient of a battery cell is greater than the preset battery charging performance evaluation coefficient, it indicates that there is a safety hazard in the charging state of the battery cell. The battery cell should be stopped immediately and relevant personnel should be notified to check the battery cell performance. Otherwise, it indicates that there is no safety hazard in the charging state of the battery cell.

[0026] Preferably, the new energy vehicle battery protection method comprises the following steps: Step S01: battery pack monomer division is used to obtain the number of battery monomer distribution of the target new energy vehicle battery pack and number each battery monomer; Step S02: Battery cell data collection is used to collect battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell, and the battery cell data collection step includes a battery charging protection data collection unit and a battery heat dissipation status data collection unit; Step S03: Battery charging thermal management data processing: The battery charging protection data acquisition unit calculates the battery charging thermal management optimization index of each battery cell of the target new energy vehicle, and provides battery charging diagnostic information for the user; Step S04: Battery heat dissipation status management calculates the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle according to the battery heat dissipation status data acquisition unit, and provides the user with battery heat dissipation status information; Step S05: The comprehensive battery charging performance evaluation is used to calculate the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle according to the battery charging thermal management optimization index and the battery heat dissipation state monitoring index of each battery cell of the target new energy vehicle; Step S06: The battery charging performance abnormality warning is used to obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, compare it with the preset battery charging performance evaluation coefficient, and process it.

[0027] Technical effects and advantages of the present invention: The present invention provides a new energy vehicle battery protection method and a new energy vehicle battery protection system method. The battery status data of each battery cell of the target new energy vehicle are collected by an integrated high-precision sensor installed on the battery cell. The battery charging protection data collection unit calculates the battery charging thermal management optimization index of each battery cell of the target new energy vehicle, and compares it with the preset battery charging thermal management optimization index. If the battery charging thermal management optimization index of a battery cell is greater than the preset battery charging thermal management optimization index, it indicates that there is an abnormality in the battery charging of the battery cell, and an alarm is immediately issued to the user through an early warning terminal. Otherwise, it indicates that there is no abnormality in the battery charging of the battery cell. The battery heat dissipation state monitoring index of each battery cell of the target new energy vehicle is calculated by the battery heat dissipation state data collection unit, and compared with the preset battery heat dissipation state monitoring index. If the battery heat dissipation state monitoring index of a battery cell is greater than the preset battery heat dissipation state monitoring index, it indicates that the battery heat dissipation state of the battery cell does not meet expectations, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that the battery heat dissipation state of the battery cell meets expectations. Through real-time collection and analysis of these parameters, combined with intelligent algorithms, By performing multi-parameter fusion processing, the charging state and the battery heat dissipation state of the new energy battery monomer can be evaluated more accurately, potential safety hazards can be discovered in time, and more comprehensive, accurate and timely protection of the battery monomer charging process can be achieved, effectively improving the safety of new energy vehicles; the present invention provides a new energy vehicle battery protection method and a new energy vehicle battery protection system method, according to the battery charging thermal management optimization index and the battery heat dissipation state monitoring index of each battery monomer of the target new energy vehicle, the battery charging performance evaluation coefficient of each battery monomer of the target new energy vehicle is calculated, and compared with the preset battery charging performance evaluation coefficient, if the battery charging performance evaluation coefficient of a certain battery monomer is greater than the preset battery charging performance evaluation coefficient, it indicates that there is a safety hazard in the charging state of the battery monomer, and the battery monomer should be stopped immediately, and the relevant personnel should be notified to check the battery monomer performance, otherwise it indicates that there is no safety hazard in the charging state of the battery monomer, by comprehensively evaluating the charging performance of the battery monomer, the battery monomer is stopped before the battery monomer has problems, and the occurrence of dangerous situations of the new energy vehicle battery is prevented, and the intelligent management of the battery charging process and heat dissipation state is achieved, and the battery management efficiency of the new energy vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the system module process connection of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the battery cell data acquisition module of the present invention.

[0030] Figure 3 It is a schematic diagram of the connection of the method steps of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1 As shown, the present invention provides a new energy vehicle battery protection system, including a battery pack monomer division module, a battery monomer data acquisition module, a battery monomer charging thermal management data processing module, a battery heat dissipation status management module, a battery charging performance comprehensive evaluation module, and a battery charging performance abnormality warning module.

[0033] The battery pack monomer division module is connected to the battery monomer data acquisition module, the battery monomer data acquisition module is connected to the battery monomer charging thermal management data processing module and the battery heat dissipation status management module, the battery monomer charging thermal management data processing module and the battery heat dissipation status management module are connected to the battery charging performance comprehensive evaluation module, and the battery charging performance comprehensive evaluation module is connected to the battery charging performance abnormal warning module.

[0034] The battery pack monomer division module is used to obtain the number of battery monomer distributions of the target new energy vehicle battery pack and number each battery monomer.

[0035] In a possible design, the battery pack monomer division module is specifically: Obtain the number of battery cells distributed in the target new energy vehicle battery pack, and number each battery cell of the target new energy vehicle in sequence as 1, 2,... according to the number of battery cells distributed in the target new energy vehicle battery pack. ,... .

[0036] See also Figure 2 As shown, the battery cell data acquisition module is used to collect battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell. The battery cell data acquisition module includes a battery charging protection data acquisition unit and a battery heat dissipation status data acquisition unit.

[0037] In a possible design, the battery cell data acquisition module is specifically: Battery charging protection data acquisition unit: The integrated high-precision sensors installed on the battery cells collect the charging efficiency, gas concentration, and charging interval of each battery cell of the target new energy vehicle, which are marked as , , ,in =1,2,... , Expressed as The number of each battery cell; Battery heat dissipation status data acquisition unit: The integrated high-precision sensor installed on the battery cell collects the heat dissipation efficiency, cooling fan speed, and temperature of each battery cell of the target new energy vehicle, which are marked as , , .

[0038] The battery cell charging thermal management data processing module is used to receive the battery status data transmitted by the battery cell data acquisition module, calculate the battery charging thermal management optimization index of each battery cell of the target new energy vehicle according to the battery charging protection data acquisition unit, and provide battery charging diagnostic information for users.

[0039] In a possible design, the calculation formula of the battery charging thermal management optimization index is:

[0040] in, Expressed as Battery charging thermal management optimization index for each battery cell, Expressed as The charging efficiency of each battery cell, Expressed as The gas concentration of each battery cell, Expressed as the preset gas concentration, Expressed as The charging interval of each battery cell, Expressed as the number of battery cells; The battery charging thermal management optimization index of each battery cell of the target new energy vehicle is compared with the preset battery charging thermal management optimization index. If the battery charging thermal management optimization index of a battery cell is greater than the preset battery charging thermal management optimization index, it indicates that there is an abnormality in the battery charging of the battery cell, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that there is no abnormality in the battery charging of the battery cell.

[0041] In this embodiment, it should be specifically stated that the charging efficiency is: Step S01: The discharge capacity, discharge time, charge capacity and charge time of each battery cell of the target new energy vehicle are collected by installing an integrated high-precision sensor on the battery cell, and marked as , , , ; Step S02: Calculate charging efficiency:

[0042] in, Expressed as The charging efficiency of each battery cell, Expressed as The discharge capacity of each battery cell, Expressed as The discharge time of each battery cell, Expressed as The charging capacity of each battery cell, Expressed as Charging time of a battery cell.

[0043] The battery heat dissipation status management module is used to receive the battery status data transmitted by the battery cell data acquisition module, calculate the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle according to the battery heat dissipation status data acquisition unit, and provide the user with battery heat dissipation status information.

[0044] In a possible design, the battery heat dissipation state management module is specifically: Step S01: Substitute the cooling fan speed and temperature of each battery cell of the target new energy vehicle into the formula:

[0045] in, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as The temperature of each battery cell, Indicates the preset temperature, Indicates the maximum speed of the cooling fan. Expressed as The cooling fan speed of each battery cell, Expressed as a natural constant; Step S02: The calculation formula of the battery heat dissipation status monitoring index is:

[0046] in, Expressed as Battery heat dissipation status monitoring index of each battery cell, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as The heat dissipation efficiency of each battery cell; Step S03: Compare the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle with the preset battery heat dissipation status monitoring index. If the battery heat dissipation status monitoring index of a battery cell is greater than the preset battery heat dissipation status monitoring index, it indicates that the battery heat dissipation status of the battery cell does not meet expectations, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that the battery heat dissipation status of the battery cell meets expectations.

[0047] In a possible design, the heat dissipation efficiency is specifically: Step S01: Extract the specific heat capacity, mass, and heat transfer coefficient of each battery cell of the target new energy vehicle through the detailed information of the battery provided on the official website of the target new energy vehicle, and mark them as , , ; Step S02: Calculate the heat that can be absorbed by each battery cell:

[0048] in, Expressed as The amount of heat that can be absorbed by a battery cell is Expressed as The specific heat capacity of a battery cell, Expressed as The mass of a battery cell, Expressed as The temperature of each battery cell, Expressed as the initial temperature of the battery cell; Step S03: The current and internal resistance of each battery cell of the target new energy vehicle are collected by installing an integrated high-precision sensor on the battery cell, and marked as , ; Step S04: The heat dissipation efficiency is calculated as follows:

[0049] in, Expressed as The heat dissipation efficiency of each battery cell, Expressed as The current of each battery cell, Expressed as The internal resistance of each battery cell, Expressed as Charging time of each battery cell, Expressed as The heat transfer coefficient of a battery cell.

[0050] The battery charging performance comprehensive evaluation module is used to calculate the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle according to the battery charging thermal management optimization index and the battery heat dissipation state monitoring index of each battery cell of the target new energy vehicle.

[0051] In a possible design, the calculation formula of the battery charging performance evaluation coefficient is:

[0052] in, Expressed as The battery charging performance evaluation coefficient of each battery cell, Expressed as Battery charging thermal management optimization index for each battery cell, Expressed as Battery heat dissipation status monitoring index of each battery cell, Expressed as the number of battery cells, Expressed as a natural constant.

[0053] The battery charging performance abnormality warning module is used to obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, compare it with the preset battery charging performance evaluation coefficient, and process it.

[0054] In a possible design, the battery charging performance abnormality warning module is specifically: Obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, and compare it with the preset battery charging performance evaluation coefficient. If the battery charging performance evaluation coefficient of a battery cell is greater than the preset battery charging performance evaluation coefficient, it indicates that there is a safety hazard in the charging state of the battery cell. The battery cell should be stopped immediately and relevant personnel should be notified to check the battery cell performance. Otherwise, it indicates that there is no safety hazard in the charging state of the battery cell.

[0055] See also Figure 3 As shown, in this embodiment, it should be specifically explained that the present invention provides a new energy vehicle battery protection method, comprising the following steps: Step S01: battery pack monomer division is used to obtain the number of battery monomer distribution of the target new energy vehicle battery pack and number each battery monomer; Step S02: Battery cell data collection is used to collect battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell, and the battery cell data collection step includes a battery charging protection data collection unit and a battery heat dissipation status data collection unit; Step S03: Battery charging thermal management data processing: The battery charging protection data acquisition unit calculates the battery charging thermal management optimization index of each battery cell of the target new energy vehicle, and provides battery charging diagnostic information for the user; Step S04: Battery heat dissipation status management calculates the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle according to the battery heat dissipation status data acquisition unit, and provides the user with battery heat dissipation status information; Step S05: The comprehensive battery charging performance evaluation is used to calculate the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle according to the battery charging thermal management optimization index and the battery heat dissipation state monitoring index of each battery cell of the target new energy vehicle; Step S06: The battery charging performance abnormality warning is used to obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, compare it with the preset battery charging performance evaluation coefficient, and process it.

[0056] In the present embodiment, it should be specifically explained that the present invention collects the battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell, calculates the battery charging thermal management optimization index of each battery cell of the target new energy vehicle according to the battery charging protection data acquisition unit, and compares it with the preset battery charging thermal management optimization index. If the battery charging thermal management optimization index of a battery cell is greater than the preset battery charging thermal management optimization index, it indicates that there is an abnormality in the battery charging of the battery cell, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that there is no abnormality in the battery charging of the battery cell, and the battery heat dissipation status data acquisition unit calculates the battery charging thermal management optimization index of each battery cell of the target new energy vehicle. The battery heat dissipation status monitoring index of a battery cell is compared with the preset battery heat dissipation status monitoring index. If the battery heat dissipation status monitoring index of a battery cell is greater than the preset battery heat dissipation status monitoring index, it indicates that the battery heat dissipation status of the battery cell does not meet expectations, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that the battery heat dissipation status of the battery cell meets expectations. Through real-time collection and analysis of these parameters, combined with intelligent algorithms for multi-parameter fusion processing, the charging status and battery heat dissipation status of new energy battery cells can be more accurately evaluated, potential safety hazards can be discovered in time, and more comprehensive, accurate and timely protection of the battery cell charging process can be achieved, effectively improving the safety of new energy vehicles.

[0057] In the present embodiment, it should be specifically explained that the present invention calculates the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle according to the battery charging thermal management optimization index and the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle, and compares the calculated battery charging performance evaluation coefficient with the preset battery charging performance evaluation coefficient. If the battery charging performance evaluation coefficient of a certain battery cell is greater than the preset battery charging performance evaluation coefficient, it indicates that there is a safety hazard in the charging status of the battery cell, and the use of the battery cell should be stopped immediately, and relevant personnel should be notified to check the battery cell performance. Otherwise, it indicates that there is no safety hazard in the charging status of the battery cell. By comprehensively evaluating the charging performance of the battery cell, the battery cell is stopped before any problem occurs in the battery cell, thereby preventing the occurrence of dangerous situations in the new energy vehicle battery, realizing intelligent management of the battery charging process and heat dissipation status, and improving the battery management efficiency of new energy vehicles.

[0058] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. New energy vehicle battery protection system, characterized in that: include: Battery pack monomer division module: used to obtain the number of battery monomer distribution of the target new energy vehicle battery pack and number each battery monomer; Battery cell data acquisition module: used to collect battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell. The battery cell data acquisition module includes a battery charging protection data acquisition unit and a battery heat dissipation status data acquisition unit; Battery cell charging thermal management data processing module: used to receive the battery status data transmitted by the battery cell data acquisition module, calculate the battery charging thermal management optimization index of each battery cell of the target new energy vehicle according to the battery charging protection data acquisition unit, and provide battery charging diagnostic information for users; Battery heat dissipation status management module: used to receive the battery status data transmitted by the battery cell data acquisition module, calculate the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle according to the battery heat dissipation status data acquisition unit, and provide the user with battery heat dissipation status information; Battery charging performance comprehensive evaluation module: used to calculate the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle based on the battery charging thermal management optimization index and battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle; Battery charging performance abnormal warning module: used to obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, compare it with the preset battery charging performance evaluation coefficient, and process it.

2. The new energy vehicle battery protection system according to claim 1, characterized in that: The battery pack monomer division module is specifically: Obtain the number of battery cells distributed in the target new energy vehicle battery pack, and number each battery cell of the target new energy vehicle in sequence as 1, 2,... according to the number of battery cells distributed in the target new energy vehicle battery pack. ,... .

3. The new energy vehicle battery protection system according to claim 1, characterized in that: The battery cell data acquisition module is specifically: Battery charging protection data acquisition unit: The charging efficiency, gas concentration, and charging interval of each battery cell of the target new energy vehicle are collected through the integrated high-precision sensors installed in the battery cells, and marked as , , ,in =1,2,... , Expressed as The number of each battery cell; Battery heat dissipation status data acquisition unit: The integrated high-precision sensor installed on the battery cell collects the heat dissipation efficiency, cooling fan speed, and temperature of each battery cell of the target new energy vehicle, which are marked as , , .

4. The new energy vehicle battery protection system according to claim 1, characterized in that: The calculation formula of the battery charging thermal management optimization index is: in, Expressed as Battery charging thermal management optimization index for each battery cell, Expressed as The charging efficiency of each battery cell, Expressed as The gas concentration of each battery cell, Expressed as the preset gas concentration, Expressed as The charging interval of each battery cell, Expressed as the number of battery cells; The battery charging thermal management optimization index of each battery cell of the target new energy vehicle is compared with the preset battery charging thermal management optimization index. If the battery charging thermal management optimization index of a battery cell is greater than the preset battery charging thermal management optimization index, it indicates that there is an abnormality in the battery charging of the battery cell, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that there is no abnormality in the battery charging of the battery cell.

5. The new energy vehicle battery protection system according to claim 1, characterized in that: The battery heat dissipation status management module is specifically: Step S01: Substitute the cooling fan speed and temperature of each battery cell of the target new energy vehicle into the formula: in, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as The temperature of each battery cell, Indicates the preset temperature, Indicates the maximum speed of the cooling fan. Expressed as The cooling fan speed of each battery cell, Expressed as a natural constant; Step S02: The calculation formula of the battery heat dissipation status monitoring index is: in, Expressed as Battery heat dissipation status monitoring index of each battery cell, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as Battery heat dissipation warning indicator for each battery cell, Expressed as The heat dissipation efficiency of each battery cell; Step S03: Compare the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle with the preset battery heat dissipation status monitoring index. If the battery heat dissipation status monitoring index of a battery cell is greater than the preset battery heat dissipation status monitoring index, it indicates that the battery heat dissipation status of the battery cell does not meet expectations, and an alarm is immediately issued to the user through the early warning terminal. Otherwise, it indicates that the battery heat dissipation status of the battery cell meets expectations.

6. The new energy vehicle battery protection system according to claim 5, characterized in that: The heat dissipation efficiency is specifically: Step S01: Extract the specific heat capacity, mass, and heat transfer coefficient of each battery cell of the target new energy vehicle through the detailed information of the battery provided on the official website of the target new energy vehicle, and mark them as , , ; Step S02: Calculate the heat that can be absorbed by each battery cell: in, Expressed as The amount of heat that can be absorbed by a battery cell is Expressed as The specific heat capacity of each battery cell, Expressed as The mass of a battery cell, Expressed as The temperature of each battery cell, Expressed as the initial temperature of the battery cell; Step S03: The current and internal resistance of each battery cell of the target new energy vehicle are collected by installing an integrated high-precision sensor on the battery cell, and marked as , ; Step S04: The heat dissipation efficiency is calculated as follows: in, Expressed as The heat dissipation efficiency of each battery cell, Expressed as The current of each battery cell, Expressed as The internal resistance of each battery cell, Expressed as Charging time of each battery cell, Expressed as The heat transfer coefficient of a battery cell.

7. The new energy vehicle battery protection system according to claim 1, characterized in that: The calculation formula of the battery charging performance evaluation coefficient is: in, Expressed as The battery charging performance evaluation coefficient of each battery cell, Expressed as Battery charging thermal management optimization index for each battery cell, Expressed as Battery heat dissipation status monitoring index of each battery cell, Expressed as the number of battery cells, Expressed as a natural constant.

8. The new energy vehicle battery protection system according to claim 1, characterized in that: The battery charging performance abnormality warning module is specifically: Obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, and compare it with the preset battery charging performance evaluation coefficient. If the battery charging performance evaluation coefficient of a battery cell is greater than the preset battery charging performance evaluation coefficient, it indicates that there is a safety hazard in the charging state of the battery cell. The battery cell should be stopped immediately and relevant personnel should be notified to check the battery cell performance. Otherwise, it indicates that there is no safety hazard in the charging state of the battery cell.

9. A method for protecting a battery of a new energy vehicle, using the battery protection system of a new energy vehicle as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step S01: battery pack monomer division is used to obtain the number of battery monomer distribution of the target new energy vehicle battery pack and number each battery monomer; Step S02: Battery cell data collection is used to collect battery status data of each battery cell of the target new energy vehicle through an integrated high-precision sensor installed on the battery cell, and the battery cell data collection step includes a battery charging protection data collection unit and a battery heat dissipation status data collection unit; Step S03: Battery charging thermal management data processing: The battery charging protection data acquisition unit calculates the battery charging thermal management optimization index of each battery cell of the target new energy vehicle, and provides battery charging diagnostic information for the user; Step S04: Battery heat dissipation status management calculates the battery heat dissipation status monitoring index of each battery cell of the target new energy vehicle according to the battery heat dissipation status data acquisition unit, and provides the user with battery heat dissipation status information; Step S05: The comprehensive battery charging performance evaluation is used to calculate the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle according to the battery charging thermal management optimization index and the battery heat dissipation state monitoring index of each battery cell of the target new energy vehicle; Step S06: The battery charging performance abnormality warning is used to obtain the battery charging performance evaluation coefficient of each battery cell of the target new energy vehicle, compare it with the preset battery charging performance evaluation coefficient, and process it.

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