Deterioration degree calculating apparatus and deterioration degree calculating method for a battery
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United States of America Patent
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Dec 28, 2004
Grant Date -
Dec 18, 2003
app pub date -
May 16, 2003
filing date -
Jun 12, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A battery ECU includes a central processing unit (CPU). The CPU calculates plural deterioration degrees based on data input from a thermistor, an ammeter, and a voltmeter which detect state quantities of a nickel-hydrogen battery, and reads, from a memory, contribution degrees each of which corresponds to each of the calculated plural deterioration degrees. Then the CPU calculates a total deterioration degree of the nickel-hydrogen battery based on the deterioration degrees and the contribution degrees, calculates the contribution degrees based on the calculated total deterioration degree, and stores the contribution degrees in the memory.
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