Failure rate prediction method of battery pack

The invention provides a failure rate prediction method for a battery pack, and the method comprises the steps: obtaining a battery data list DATA according to a battery working condition curve and num1 to-be-predicted battery packs; according to the DATA, a capacity attenuation group CAPLOSS is obt...

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Bibliographic Details
Main Authors JIA LEI, DENG XIAOGUANG, LIANG YUANBO, WU TIAN, CHO YUN-HEE, OU LONGHUI
Format Patent
LanguageChinese
English
Published 09.05.2023
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention provides a failure rate prediction method for a battery pack, and the method comprises the steps: obtaining a battery data list DATA according to a battery working condition curve and num1 to-be-predicted battery packs; according to the DATA, a capacity attenuation group CAPLOSS is obtained; randomly grouping the capacity attenuation in the CAPLOSS to obtain a target capacity attenuation group corresponding to each to-be-predicted battery pack, and obtaining the maximum predicted capacity attenuation corresponding to each to-be-predicted battery pack to obtain a maximum predicted capacity attenuation group; determining the number num3 of predicted capacity attenuation greater than a preset capacity attenuation threshold in the maximum predicted capacity attenuation group; and determining the failure rate (rate = num < 3 >/num1) of the num1 battery packs to be predicted after the battery packs pass through the tpre. Therefore, the error of the predicted capacity attenuation amount is small, and t
Bibliography:Application Number: CN202211650297