| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat-shaped non-aqueous electrolyte secondary battery suppressing breaking of an electrode and a separator in a battery case by dispersing concentration of heat generated by welding a lead terminal and preventing deterioration in capacity and a short circuit in the battery. SOLUTION: In a flat-shaped non-aqueous electrolyte secondary battery, a metal negative electrode case serving as a negative electrode terminal and a metal positive electrode case serving as a positive electrode terminal are engaged via an insulating gasket, the positive electrode case or the negative electrode case has a sealing structure caulked by caulking processing, and an electrode group at least comprising the positive electrode, the negative electrode and a thin film separator and a non-aqueous electrolyte are contained inside the sealing structure. A metal net is arranged between the positive electrode case or the negative electrode case and the electrode group. The positive electrode or the negative electrode has a layer containing an active material on a surface of a collector made of metal foil. The positive electrode or the negative electrode in the electrode group is brought into contact with the metal net at an exposed portion of the metal foil. COPYRIGHT: (C)2011,JPO&INPIT
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