Skip to Content
Find More Like This
Return to Search

Device for monitoring cell voltage

United States Patent

8,248,030
August 21, 2012
View the Complete Patent at the US Patent & Trademark Office
A device for monitoring a rechargeable battery having a number of electrically connected cells includes at least one current interruption switch for interrupting current flowing through at least one associated cell and a plurality of monitoring units for detecting cell voltage. Each monitoring unit is associated with a single cell and includes a reference voltage unit for producing a defined reference threshold voltage and a voltage comparison unit for comparing the reference threshold voltage with a partial cell voltage of the associated cell. The reference voltage unit is electrically supplied from the cell voltage of the associated cell. The voltage comparison unit is coupled to the at least one current interruption switch for interrupting the current of at least the current flowing through the associated cell, with a defined minimum difference between the reference threshold voltage and the partial cell voltage.
Doepke; Matthias (Garbsen, DE), Eisermann; Henning (Edermissen, DE)
Johnson Controls Technology Company (Holland, MI)
12/ 177,024
July 21, 2008
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT The government of the United States has rights in this invention pursuant to Contract No. DE-FC26-95EE50425 awarded by the U.S. Department of Energy.