Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1996-05-15
1998-04-14
Tso, Edward
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 48, H01M 1046, H01M 1048
Patent
active
057396710
ABSTRACT:
A charge state detecting device has a battery device including a plurality of batteries connected in series, a current sensor which detects a current flowing from the battery device, and a voltage sensor which detects the voltage of each of the batteries. A main controller calculates a correlation between discharge current and battery voltage, and provides an estimated voltage of each battery of the batteries under a constant energy discharge, based on the correlation. The estimated voltages for the batteries are used for deriving the capacity of each battery with reference to a voltage-capacity characteristic, which is stored in advance. The main controller supplies to a display indicator the minimum one of the derived capacities to warn of an impending need to charge the batteries.
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Nippondenso Co. Ltd.
Tso Edward
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