| 摘要 |
PROBLEM TO BE SOLVED: To provide a lead acid battery suppressing bending of lug portions and preventing short-circuits. SOLUTION: The lead acid battery related to the present invention is equipped with a plurality of positive plates having lug portions 11 made of a lead alloy sheet and a strap 10 for welding the plurality of positive plates together at the lug portion 11. The lug portion 11 of the plate contains both a rolling texture 13 and a re-crystallization texture 12 caused by welding. Since the length X from the root portion 14 at which the surfaces 11A and 11B of the lug portion 11 touch the surface of the strap 10 to the boundary 15 of the re-crystallization texture 12 and the rolling texture 13 in the surfaces 11A and 11B of the lug portion 11 is equal to or less than the thickness Y of the lug portion, bending of the lug portion 11 can be suppressed and short-circuits can be prevented. COPYRIGHT: (C)2009,JPO&INPIT
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