Title:
BATTERY PACK AND MEASUREMENT METHOD THEREFOR, AND BATTERY MANAGEMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2024/044955
Kind Code:
A1
Abstract:
The present application discloses a battery pack and a measurement method therefor, and a battery management system (BMS), for use in finding abnormal connections between battery sub-packs in a battery pack in a timely manner. The battery pack comprises a plurality of battery sub-packs, voltage measurement circuits, a current measurement circuit, and a BMS, the plurality of battery sub-packs are connected in series in a charging/discharging circuit of the battery pack, and each battery sub-pack and one connection member connected to the battery sub-pack constitute a component to be measured. The current measurement circuit is used for measuring the current of the charging/discharging circuit; the voltage measurement circuits are used for measuring the voltage of two ends of the component to be measured; and the BMS is used for obtaining, according to a preset cycle, the current of the charging/discharging circuit and the voltage of two ends of each component to be measured, generating a current sequence and a first voltage sequence of each component to be measured, respectively calculating, according to the current sequence and the first voltage sequence, the impedance of each component to be measured, and determining that the connection member in the component to be measured is connected abnormally when the impedance is greater than or equal to an impedance threshold.
Inventors:
XIONG CHENG (CN)
HOU TIANHONG (CN)
XIE JIE (CN)
HOU TIANHONG (CN)
XIE JIE (CN)
Application Number:
PCT/CN2022/115790
Publication Date:
March 07, 2024
Filing Date:
August 30, 2022
Export Citation:
Assignee:
HUAWEI DIGITAL POWER TECH CO LTD (CN)
International Classes:
G01R31/396; G01R31/3842; G01R31/389; G01R31/392; H01M10/48
Foreign References:
| CN103399282A | 2013-11-20 | |||
| US20140227571A1 | 2014-08-14 | |||
| CN103983888A | 2014-08-13 | |||
| US20070052424A1 | 2007-03-08 | |||
| US20160069965A1 | 2016-03-10 | |||
| CN107942254A | 2018-04-20 |
Other References:
JIANING XU, DONGBIN LIANG, GUO WEI, CHUNBO ZHU: "Series Battery Pack's Contact Resistance Fault Diagnosis Analysis", TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY, vol. 32, no. 18, 23 June 2017 (2017-06-23), pages 106 - 112, XP093145148, ISSN: 1000-6753, DOI: 10.19595/j.cnki.1000-6753.tces.151595
Attorney, Agent or Firm:
TDIP & PARTNERS (CN)
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