Title:
METHOD AND DEVICE FOR DETECTING STATE OF HEALTH OF BATTERY, AND BATTERY MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/143830
Kind Code:
A1
Abstract:
A method and device for detecting the state of health (SOH) of a battery, and a battery management system. The method comprises: determining whether the present state of charge (SOC) of a battery falls within an intersection interval of a linear interval of an SOC-open circuit voltage (OCV) relation and a linear interval of a direct current internal resistance (DCIR)-SOC relation of the battery, and determining whether the present current of the battery falls within a current interval corresponding to the intersection interval; and if the SOC of the battery falls within the intersection interval and the current I falls within the current interval, obtaining the capacity before aging and the capacity after aging of the battery during the charging or discharging of the battery, thereby accurately estimating the SOH of the battery.
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Inventors:
JIANG JIANPING (CN)
SU LAISUO (CN)
LI ZHE (CN)
SU LAISUO (CN)
LI ZHE (CN)
Application Number:
PCT/CN2016/108829
Publication Date:
August 31, 2017
Filing Date:
December 07, 2016
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G01R31/36
Domestic Patent References:
| WO2012053075A1 | 2012-04-26 |
Foreign References:
| CN104569827A | 2015-04-29 | |||
| CN101813754A | 2010-08-25 | |||
| CN104502859A | 2015-04-08 | |||
| CN104931886A | 2015-09-23 | |||
| US9157968B1 | 2015-10-13 |
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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