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Title:
DETECTION METHOD AND DEVICE FOR MICRO SHORT CIRCUIT OF BATTERY
Document Type and Number:
WIPO Patent Application WO/2018/059074
Kind Code:
A1
Abstract:
A detection method and device for micro short circuit of a battery. The detection method comprises: acquiring a first reference charging capacity of a single battery to be detected included in a battery pack to be detected at a first charging end moment and a second reference charging capacity of same at a second charging end moment (S201), wherein the reference charging capacity is a difference value between an electric quantity of the single battery to be detected and an electric quantity of a reference single battery, and the reference single battery is a single battery having the maximum voltage value at a charging end moment in all the single batteries included in the battery pack to be detected; and determining that micro short circuit occurs in the single battery to be detected according to a difference value between the first reference charging capacity and the second reference charging capacity (S202). The detection method and device for micro short circuit of a battery have the advantages of improving the accuracy of micro short circuit detection for batteries, enhancing the applicability of micro short circuit for batteries, and decreasing the misjudgement rate of battery faults.

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Inventors:
LIU BINGXIAO (CN)
ZHANG GUANGHUI (CN)
ZHENG YUEJIU (CN)
Application Number:
PCT/CN2017/092667
Publication Date:
April 05, 2018
Filing Date:
July 12, 2017
Export Citation:
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Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G01R31/36
Foreign References:
CN103138017A2013-06-05
CN104614631A2015-05-13
CN201623512U2010-11-03
CN102144171A2011-08-03
CN105190330A2015-12-23
CN1174441A1998-02-25
CN104614630A2015-05-13
CN104614632A2015-05-13
JP2016090399A2016-05-23
JP2014002009A2014-01-09
JP2016075567A2016-05-12
JP5768769B22015-08-26
JP5652802B22015-01-14
Other References:
See also references of EP 3508867A4
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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