Patent ID: 10804508

Abstract:
A sealed cell according to the present invention includes an angular case 50 that accommodates an electrode body. The angular case 50 includes a concave case main body 52, having an opening, and a sealing member 54. The case main body 52 has a flat surface 52a opposed to the sealing member 54, with the electrode body interposed therebetween, and a side wall 52b rising from the flat surface 52a. The peripheral edge portion of the opening provided in the case main body 52 and the sealing member 54 are joined to each other by seal welding. Concave and convex portions including concave portions 56a, 156a recessed toward the inside of the case and convex portions 56b flush with the flat surface 52a are formed on at least one side 58a portion of end sides of the flat surface 52a. Electrode terminals 80, 82 are disposed on bottom surfaces of the concave portions 56a, 156a.