| 摘要 |
PROBLEM TO BE SOLVED: To secure high reliability without causing battery jar breakage or the like even if a lead-acid battery is used over a long time. SOLUTION: A bone part 1 is disposed inside a collector. The collector is manufactured by using a lead-calcium (0.05%)-tin (1.0%)-aluminum (0.02%) alloy, and by a book-mold casting method. It is confirmed that the elongation of the collector generated in using the sealed lead-acid battery over a long time is absorbed, and 70% of its capacity is kept. That is to say, the service life thereof is improved by 20% as compared with a sealed lead-acid battery using a collector of a conventional technique. COPYRIGHT: (C)2004,JPO&NCIPI
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