Panasonic Intellectual Property Management Co., Ltd.

Shinpei Yamagami

Yasushi Nakagiri

Mizuo Iwasaki

Kenji Saruwatari

Kazuhiko Watanabe

Disclosed is a rectangular battery in which an electrode group formed by winding a first electrode and a second electrode with a separator interposed therebetween is housed in a battery case having an opening sealed by a sealing plate. The first electrode is electrically connected to the sealing plate, and the second electrode is electrically connected to a current collector plate provided between the sealing plate and the electrode group and extending along a longer side direction of the sealing plate. The sealing plate has a lower-strength portion configured to be deformed prior to the other portions of the sealing plate to provide a contact between the sealing plate and the current collector plate when the sealing plate receives an external pressure along the longer side direction of the sealing plate.

Growing community of inventors

Tokushima, Japan

Shinpei Yamagami