| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a sealing can from being deformed by concentration of compressive force while surely sealing the sealing can to an outer can by efficiently applying pressure to a gasket when fitting the sealing can to the outer can. <P>SOLUTION: A flat battery includes the sealing can having a side face part equipped with a top face part and a step part expanded stepwise, an outer can having a diameter larger than that of the sealing can, a bottom part, and a side wall part, a gasket molded so as to sandwich the side face part of the sealing can, and an electrode body equipped with a positive electrode, a negative electrode, and a separator. The electrode body is disposed in a space hermetically sealed by caulking the side wall part of the outer can to the side face part of the sealing can with the gasket sandwiched, the thickness of the gasket on the inside of the side face part of the sealing can in the lower part of the step part is formed thicker than the thickness in the direction toward the electrode body from the inside face of the side face part of the sealing can in the bottom part of the outer can, and the gasket is formed so as to be separated from the top face part of the sealing can. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
