| 摘要 |
PROBLEM TO BE SOLVED: To provide a long life and very safe control valve lead storage battery suppressing corrosion of a connecting portion between a positive electrode shelf and an electrode pole part, which occurs when trickle charging is carried out on the control valve lead battery for a long period of time, and suppressing cracks caused by the corrosion. SOLUTION: The battery has a group of electrode plates consisting of rectangular positive electrode plates and negative electrode plates which are arranged via retainers, wherein electrolyte is contained in the group of electrode plates. The control valve lead battery has a shelf portion 14 which is formed by welding current collection lugs 12 of positive electrode plates all together, and has connecting members 13 which are used for connecting electrically electrode poles or connectors welded to the shelf portion. A is ratio S<SB>1</SB>/S<SB>2</SB>, wherein S<SB>1</SB>is the area of the cross section of a boundary portion between the connecting member and the shelf portion, and S<SB>2</SB>is total summation of the area of the cross sections of the current collection lugs. d is the length of a side of the positive electrode plate, where the current collection lug 12 is disposed, h is the length of other side which is approximately orthogonal to above side, and B is ratio h/d. A≥1 when B≥1. A≥2.5B-1.5 when B≥0.8 and B is less than 1. A≥0.625B when B is less than 0.8. COPYRIGHT: (C)2004,JPO
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