RatnerPrestia
Method for producing rectangular cell
A method for manufacturing a rectangular cell is provided in which a rectangular case containing a power generating element is hermetically sealed by laser welding a sealing plate to an open end of the rectangular case. A sealing plate 2 formed into the same shape as the upper open end of a rectangular case 1 is laid on the upper open end, laser beams 3a to 3d are applied in a downward direction from the horizontal to a line of contact 4 comprising sides &#8220;a&#8221; to &#8220;d&#8221; including respective corners &#8220;e&#8221;, and the line of contact 4 is scanned with laser beams 3a to 3d thereby sealing the open end of the case with the sealing plate.
Matsushita Electric Industrial Co., Ltd.
H H Y
H01M H01M Y02E
inventional inventional additional
Kikuo Kazunori Takuya Hiroshi Takashi
Senoo Haraguchi Nakashima Yoshizawa Takeuchi