Sensor circuit for providing maximum and minimum cell voltages o

Details Sensor circuit for providing maximum and minimum cell voltages o Sensor circuit for providing maximum and minimum cell voltages o

1996-02-22

1997-10-14

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

With measuring, testing, or indicating means

324433, H01M 1048

Patent

active

056770774

ABSTRACT:
A sensor circuit is provided for monitoring four cells of a battery. The sensor circuit provides a maximum terminal cell voltage and a minimum terminal cell voltage. In a switched capacitor embodiment, one comparator compares the cells, two at a time. The output of the comparator is provided to a maximum state machine and a minimum state machine which select the cells with the highest and lowest voltages, respectively. In a continuous system embodiment, six comparators continuously monitor the cell voltages. The comparator outputs are provided to a maximum logic circuit and a minimum logic circuit which select the cells with the highest and lowest voltages, respectively, and provides a maximum and a minimum terminal voltages signals. These maximum and minimum terminal voltage signals are provided so that a charge controller can monitor the cells for overcharge and discharge conditions.

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