Secondary-battery management apparatuses, secondary-battery management method, and secondary-battery management program
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United States of America Patent
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Dec 15, 2009
Grant Date -
Jun 28, 2007
app pub date -
Dec 27, 2006
filing date -
Dec 28, 2005
priority date (Note) -
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Abstract
A secondary-battery management apparatus calculates the possible discharge duration of a secondary battery correctly even after a load current changes. The secondary-battery management apparatus calculates the remaining capacity and the remaining lifetime of the secondary battery in accordance with a measured temperature of the battery in a standby state, calculates the remaining capacity of the battery in accordance with a measured discharging current of the battery while the battery is in a discharging state, and calculates the remaining capacity of the battery in accordance with a measured charging current while the battery is in a charging state. When discharging from the battery is required by means of a reduction of an output voltage of a rectifier, the deterioration of the battery is checked by discharging to a load device. A battery capacity is checked by measuring the discharge duration of the battery in the discharge by the load current pattern.
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