METHOD AND DEVICE FOR DETECTING BATTERY MICRO-SHORT CIRCUIT

Title:

METHOD AND DEVICE FOR DETECTING BATTERY MICRO-SHORT CIRCUIT

Document Type and Number:

WIPO Patent Application WO/2018/113773

Kind Code:

A1

Abstract:

A method and a device for detecting a battery micro-short circuit, the method comprising: obtaining a target initial battery parameters value of a target battery at an initial time, and determining a reference initial battery parameters value of a virtual reference battery at the initial time, wherein under the same excitation conditions, a response of the virtual reference battery is the same as a response of the target battery; obtaining a target battery parameters value of the target battery at a specified time; determining a reference battery parameters value of the virtual reference battery at the specified time according to the target battery parameters value and reference initial battery parameters; calculating a difference value between the target battery parameters value and the reference battery parameters value, and determining that a micro-short circuit occurs in the target battery according to the difference value. Using the present embodiments has the advantages of being able to improve the accuracy of battery micro-short circuit detection, enhance the applicability of battery micro-short circuit detection, and reduce the battery failure misjudgment rate.

Inventors:

LIU BINGXIAO (CN)
YANG RUI (CN)
LIU XIAOKANG (CN)

Application Number:

PCT/CN2017/117965

Publication Date:

June 28, 2018

Filing Date:

December 22, 2017

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

G01R31/36; G01R31/02

Foreign References:

CN104833919A	2015-08-12
CN1821801A	2006-08-23
CN103636030A	2014-03-12
CN101034141A	2007-09-12
CN104614630A	2015-05-13
CN104614631A	2015-05-13
CN102576895A	2012-07-11
CN102104180A	2011-06-22
US6255803B1	2001-07-03

Other References: