Battery stack cell monitor

A battery monitor system (10) for determining a cell voltage (VC) between a low side contact (14) and a high side contact (16) of a cell (18) in situ as one of a plurality of cells connected in series to form a battery (20). The system (10) uses an arrangement of switches (30) and capacitors to shif...

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Bibliographic Details
Main Authors KEYSE, MARK R, ZARABADI, SEYED R, BLOCK, THOMAS G
Format Patent
LanguageEnglish
French
German
Published 06.03.2013
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:A battery monitor system (10) for determining a cell voltage (VC) between a low side contact (14) and a high side contact (16) of a cell (18) in situ as one of a plurality of cells connected in series to form a battery (20). The system (10) uses an arrangement of switches (30) and capacitors to shift relatively high absolute voltages of a battery (20) stack to a relative low voltage level so lower voltage electronics can be used to monitor cell voltages. The system (10) may be configured to provide a single ended measurement or a differential measurement indicative of a cell voltage (VC). The differential measurement may be advantageous to correct or offset signal noise caused by electromagnetic interference (EMI).
Bibliography:Application Number: EP20120181376