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A battery pack maintenance detection method

A detection method and battery pack technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of affecting batteries, battery pack failure, inconsistent initial performance, etc.

Active Publication Date: 2015-09-09
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The initial performance inconsistency between the individual cells in the battery pack, the poorer performing cells in the battery pack will affect the better performing cells, and ultimately affect the overall performance of the battery pack, causing the battery pack to fail prematurely

Method used

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  • A battery pack maintenance detection method
  • A battery pack maintenance detection method
  • A battery pack maintenance detection method

Examples

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Embodiment Construction

[0049] The present invention will be further described in detail below in conjunction with the examples, but the protection scope of the present invention is not limited thereto.

[0050] A battery pack maintenance detection method, the battery pack is composed of a number of battery cells connected in series, the method accordingly includes the following steps:

[0051] (1) battery pack B={B 1 , B 2 ,...,B s}, s is the number of battery cells in the battery pack, s>1; a battery cell is composed of more than one single battery connected in parallel or in series, firstly according to the rated capacity C of the battery pack, the state of health SOH, the self-discharge rate SDisR, and the internal resistance R Carry out maintenance analysis on the battery pack, and select abnormal single batteries. When the battery unit information meets any of the following conditions, it is considered that the battery unit is an abnormal battery unit and needs to be replaced and maintained:

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Abstract

The invention relates to a battery pack maintaining and detecting method. The battery pack maintaining and detecting method includes steps of (1) maintaining and analyzing a battery pack firstly according to rated capacity C, statement of health SOH, self-discharge rate SDisR and internal resistance of the battery pack; (2) ordering a voltage data into a matrix; (3) obtaining a voltage data matrix V1; (4) obtaining a distance matrix D of the battery pack; (5) obtaining a relevant coefficient matrix r of the battery pack; (6) obtaining a performance coefficient matrix W of the battery pack; and (7) obtaining a battery unit classifying set Q relative to voltage and traversing battery unit classifying sets. Various factors affecting battery performance are comprehensively assessed, performance uniformity of the battery pack is improved, probability of sudden change of performances of the battery during late use of the battery is effectively decreased, and simultaneously, utilization rate of the battery unit is increased. Meanwhile, the service lives of grouped battery units are prolonged.

Description

technical field [0001] The invention relates to a battery pack maintenance detection method. Background technique [0002] Currently, batteries are widely used as an ideal power source for energy storage power stations. At the same time, in order to obtain higher power within a suitable current range, the batteries must be combined in series to obtain a higher operating voltage. The initial performance inconsistency between the individual cells in the battery pack, the poor performance of the single cells in the battery pack will affect the better performing cells, and ultimately affect the overall performance of the battery pack, resulting in premature failure of the battery pack. Therefore, during the use of the battery pack, it is necessary to monitor the battery pack, detect abnormal batteries as soon as possible and perform maintenance and replacement to improve the performance consistency of the battery pack, thereby improving the life and efficiency of the battery pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 李勇琦陈满黄晓东钟朝现刘邦金王浩刘爱华彭鹏王文辉
Owner SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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