| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat type nonaqueous secondary battery with excellent reliability and productivity.SOLUTION: In a flat nonaqueous secondary battery, positive electrodes and negative electrodes are alternately laminated via separators, and in almost parallel to flat planes of an outer case and a sealing case in a space formed by caulking and sealing a positive electrode case and a negative electrode case via an insulation gasket. The flat nonaqueous secondary battery has an electrode group whose total number of the positive and negative electrodes is 3 or more, and nonaqueous electrolyte. Each collector tab part of the positive or negative electrode is collected, welded and integrated, and folded on an electrode with the same polarity on an outermost side of the electrode group, and its end is arranged at a specific portion. The integrated collector tab part of the positive or negative electrode is held between an outer face of the electrode group and an inner face of the positive electrode case or the negative electrode case. |
