Detecting whether a battery management system is abnormal

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United States of America Patent

PATENT NO 12061237
APP PUB NO 20210199722A1
SERIAL NO

17204759

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Abstract

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A method for detecting whether a battery management system is abnormal includes: calculating a value of a theoretical time constant corresponding to a first cell; determining a preset range of the theoretical time constant; controlling a first switch to turn off for a first time period, turn on for a second time period, turn off for a third time period; measuring a voltage on a first capacitor at end of first time period, to produce a measured voltage of first cell; measuring voltages on first capacitor at least at one time point in third time period, to produce measured capacitance voltages; determining a value of a measured time constant according to at least one of measured capacitance voltages and the measured voltage of first cell; and determining the battery management system is abnormal, if the value of the measured time constant exceeds the preset range of the theoretical time constant.

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Patent Owner(s)

Patent OwnerAddress
UBS AG SINGAPORE BRANCH AS SECURITY AGENT9 PENANG ROAD SINGAPORE 238459

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Li, Guoxing Sunnyvale, US 112 1341
Zeng, Xiaojun Shanghai, CN 18 139
Zhang, Yingguo Wuhan, CN 9 44

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