| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrochemical element having stable electrical connection between a collector part and a collector plate and capable of sufficiently securing welding strength between a collector body and the collector plate, and of preventing an internal short circuit. SOLUTION: A collector body exposure part 9 without applying an active material thereto is formed on a positive electrode plate 1 composed by applying an active material to a strip-like collector body; a resin coating 13 is formed on the base part of the collector body exposure part 9; a collector body exposure part 12 without applying an active material thereto is formed on a negative electrode plate 2 composed by applying an active material to a strip-like collector body; and a resin coating 14 is formed on the base part of the collector body exposure part 12. The collector body exposure parts 9 and 12 projected on both ends when an electrode plate group 4 is formed by rolling both the electrode plates by disposing a separator between them are pressed to form welding surfaces, and a positive electrode collector plate 10 and a negative electrode collector plate 11 are respectively welded to them. COPYRIGHT: (C)2006,JPO&NCIPI
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