| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a square secondary battery in which the end of a core body exposed portion and the end of a collector member are prevented from coming into contact with the inner surface of a square outer can.SOLUTION: A positive electrode core body exposed portion has a first positive electrode core body group where positive electrode core bodies are laminated and bundled, and a second positive electrode core body group where positive electrode core bodies are laminated and bundled. A positive electrode side resin member is arranged between the first positive electrode core body group and second positive electrode core body group. The positive electrode side resin member projects farther to one small area sidewall side than the end on one small area sidewall side in the first positive electrode core body group, the end on one small area sidewall side in the second positive electrode core body group, and the end on one small area sidewall side in the collector member for positive electrode, and a resin sheet is arranged between the positive electrode side resin member and one small area sidewall.</p> |
