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Battery module health state assessment method and device, equipment, medium and vehicle

A battery module and health state technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems that affect the safety and life of the battery system, long test cycle, waste of resources, etc.

Pending Publication Date: 2021-09-07
BEIJING CHJ AUTOMOTIVE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of tiny foreign matter can hardly be effectively identified during the short-term use of the power battery. However, as the power battery cycle increases, the difference between the battery cells containing impurities or particles and the normal cells will gradually appear, and seriously affect the battery system. safety and longevity
[0003] The evaluation method of the battery module health state in the prior art mainly adopts to discharge the battery module from 100% state of charge to 0% state of charge, the test period is long, and it is suitable for the battery module with normal life decay, and The test cycle is long, which will cause a waste of resources

Method used

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  • Battery module health state assessment method and device, equipment, medium and vehicle
  • Battery module health state assessment method and device, equipment, medium and vehicle
  • Battery module health state assessment method and device, equipment, medium and vehicle

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Embodiment Construction

[0074] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0075] In the following description, many specific details are set forth in order to fully understand the present disclosure, but the present disclosure can also be implemented in other ways than described here; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, and Not all examples.

[0076] figure 1 It is a schematic flowchart of a method for evaluating the health state of a battery module provided by an embodiment of the present disclosure. This embodiment is applicable to the situation of evaluating the state of health of the battery module. The method of this embodiment...

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Abstract

The invention relates to a battery module health state assessment method and device, electronic equipment and a medium. The assessment method comprises the following steps: acquiring capacity attenuation characteristic curves of different groups of battery cell modules in corresponding capacity intervals; determining capacity attenuation rates corresponding to the different groups of battery cell modules according to the capacity attenuation characteristic curves corresponding to the different groups of battery cell modules; obtaining a capacity attenuation characteristic curve of the battery module corresponding to the battery cell module with the fastest capacity attenuation rate; and determining the health state of the battery module according to the capacity attenuation characteristic curve of the battery module. The evaluation efficiency of the health state of the battery module is improved.

Description

technical field [0001] The present disclosure relates to the technical field of batteries, and in particular to a method, device, equipment, medium and vehicle for evaluating the state of health of a battery module. Background technique [0002] The smallest unit of a power battery is a cell module, a group of cell modules can form a battery module, and several battery modules form a battery pack for a power battery. During the manufacturing process of existing power batteries, particles or impurities will be introduced during the process of preparing the cell module. This kind of tiny foreign matter can hardly be effectively identified during the short-term use of the power battery, but as the power battery cycle increases, the difference between the battery cells containing impurities or particles and the normal cells will gradually appear, and seriously affect the battery system safety and longevity. [0003] The evaluation method of battery module health status in the ...

Claims

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Application Information

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IPC IPC(8): G01R31/392G01R31/396
CPCG01R31/392G01R31/396
Inventor 杨凯柳志民
Owner BEIJING CHJ AUTOMOTIVE TECH CO LTD
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