| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery having a current collecting structure provided with a stable joint part of an electrode plate to a current collecting plate, and suitable for large-current discharge. SOLUTION: An electrode group where a positive electrode plate and a negative electrode plate are arranged through a porous insulating layer in a state where the end portions 1a and 2a of the positive electrode plate and the negative electrode plate protrude from the porous insulating layer, and current collecting plates 10 and 11 each provided with a protrusion part 12 having a gap part 12a on the inside are prepared. While bringing the electrode plate end portions 1a and 2a projecting from the porous insulating layer into contact with principal surfaces of the current collecting plates 10 and 11, the protrusion part 12 is heated locally to joint the electrode plate end portions 1a and 2a to the current collecting plates 10 and 11, and the electrode plate end portions 1a and 2a are welded to the current collecting plates 10 and 11 by a molten member produced by melting the protrusion part 12. COPYRIGHT: (C)2008,JPO&INPIT |
