| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery status detecting apparatus uniquely defining a deteriorated state of a battery even when the battery is deteriorated in various modes. SOLUTION: The battery status detecting apparatus measures open circuit voltage of a battery in a state of full charge (S204), calculates reduced amountΔSOH1 of SOH (State Of Health) of a lead battery on the side of a high OCV (open circuit voltage)(S210). When peak voltage Vp of the lead battery is 8V and less when an engine is started (S310), a reduced amountΔSOH2 of SOH in the lead battery on a low OCV side by SOH map between a discharge voltage and the open circuit voltage is calculated (S312), and the deteriorated state SOH of the lead battery is calculated fromΔSOH1 andΔSOH2 (S212, S314). SOH, etc., close to a real value of the lead battery cell are calculated. COPYRIGHT: (C)2005,JPO&NCIPI
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