| 摘要 |
PROBLEM TO BE SOLVED: To provide a degree-of-deterioration estimation method for easily and precisely estimating the degree of deterioration in batteries. SOLUTION: A battery state detection system obtains an inclination (OCV<SB>i</SB>-OCV<SB>i-1</SB>)/ΔQ by an open-circuit voltage OCV<SB>i</SB>, an open-circuit voltage OCV<SB>i-1</SB>, and integrated quantity of electricityΔQ (step 124), computes SON correlated with the inclination (OCV<SB>i</SB>-OCV<SB>i-1</SB>)/ΔQ by fitting to an SOH-(OCV<SB>i</SB>-OCV<SB>i-1</SB>)/ΔQ map (step 126), and reports the SOH to a vehicle control system 11 (step 128). The SOH of a lead battery 1 correlated with the inclination (OCV<SB>i</SB>-OCV<SB>i-1</SB>) is estimated from the SOH-(OCV<SB>i</SB>-OCV<SB>i-1</SB>)/ΔQ map without preparing any concentration maps, or the like, of an active material. COPYRIGHT: (C)2004,JPO&NCIPI
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