BATTERY PACK BALANCING METHOD, BATTERY MANAGEMENT SYSTEM AND BATTERY SYSTEM

WIPO Patent Application WO/2017/139967

A1

A battery pack balancing method, a battery management system and a battery system. Said balancing method comprises: detecting the voltage data of each battery cell in a lithium iron phosphate battery pack and acquiring, according to the voltage data of each battery cell, the state of charge of the lithium iron phosphate battery pack (S101), and acquiring a minimum voltage value from the voltage data (S102); accordingly, determining whether the state of charge ranges from 10% to 40%, and respectively comparing the difference between the voltage data of each battery cell in the lithium iron phosphate battery pack and the minimum voltage value with a preset voltage threshold (S103); and if it is determined that the state of charge ranges from 10% to 40% and there is a battery cell in which the difference between the voltage data and the minimum voltage value is greater than or equal to the voltage threshold, discharging the battery cell (S104). Said balancing method improves the consistency of the state of charge among the battery cells in the lithium iron phosphate battery pack, extending the service life of the lithium iron phosphate battery pack.

CHEN LING (CN)
YANG YUANJIN (CN)
ZHOU WEI (CN)
DENG ZHAOXUAN (CN)
CAI YI (CN)
CHONG JIN (CN)

PCT/CN2016/074116

August 24, 2017

February 19, 2016

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M10/42

CN104505550A	2015-04-08
CN201956725U	2011-08-31
CN103683403A	2014-03-26
CN102355031A	2012-02-15
US20110156641A1	2011-06-30

BEIJING UNI-INTEL PATENT AND TRADEMARK OFFICE (CN)

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