| 摘要 |
PROBLEM TO BE SOLVED: To provide an enclosed square thin battery capable of being thinned and light in weight by effective preventing the deformation of a case, and capable of keeping productivity and battery characteristic. SOLUTION: An enclosed square thin battery is a square thin battery including a group of electrode 2 in a square thin case 1, and a central part on its cross section of a minor side part is recessed toward the inside of a case. The relationship of d/t is preferably 0.1-10 when a depth of the recess is (d) and a thickness of the case at the minor side is (t). A material of the square thin case 1 is preferably selected from aluminum, aluminum alloy, and iron nicket plated steel plate. When the cross section of a group of electrode 2 accomodated in the square thin case 1 is elliptic, the injection of the electrolyte can be executed with high productivity by utilizing the clearance of a case corner part. |
