| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a square secondary battery having high current collecting efficiency and satisfying large output. <P>SOLUTION: In the square secondary battery including a flat electrode assembly in which a plurality of first electrode cores and a plurality of second electrode cores are protruded in a directly laminated state from each end, and a first current collecting plate arranged on and resistance-welded to one surface parallel to the laminated surface of the first electrode core, where is the assembling region of the plurality of first electrode cores protruded in a directly laminated state, the first electrode core melt-bonded part where the directly laminated first electrode cores are melt-bonded is formed in the other region separated from the region to which the first current collecting plate is fit. <P>COPYRIGHT: (C)2010,JPO&INPIT |
