| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed battery in which welding by high energy wire between a current collector tab and the inner bottom part of a battery outer can can be made easily while the width of the current collector tab is same as a conventional one, and welding strength is large, and internal resistance of battery is small. SOLUTION: The sealed battery has a wound electrode body in which a positive electrode plate having a positive electrode mixture layer in the positive electrode core and a negative electrode plate having a negative electrode mixture layer in the negative electrode core are wound through a separator. The current collector tab is connected between the winding end side of the positive electrode core or the negative electrode core and one place other than the winding end side so as to straddle in diameter direction over the center part of the wound electrode body, and the current collector tab is welded to the inner bottom part of the battery can at a location corresponding to the center part of the wound electrode body. COPYRIGHT: (C)2007,JPO&INPIT
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