Panasonic Energy Co., Ltd.

Sanyo Electric Co., Ltd.

Satoshi Kawakami

Masaya Nakano

Takao Takatsu

Takeshi Hashimoto

Haruhiko Yoneda

A battery pack includes battery cell having exhaust valve that opens when internal pressure exceeds set pressure, and case that houses battery cell. Case includes multiple case units molded with plastic, multiple case units being coupled with mating surfaces to dispose battery cell inside case, and heat-resistant material disposed inside mating surfaces of respective multiple case units, heat-resistant material blocking gap between mating surfaces.

Battery pack

A cell module includes a plurality of cylindrical batteries and a holder composed by arranging each of cylindrical batteries in a parallel posture. The holder includes: a holder body having holding spaces for arranging cylindrical batteries at fixed positions; and a sub holder stacked on the holder body. The holder body has stopper portions deformed toward surfaces of cylindrical batteries arranged in holding spaces. The sub holder has push rods that push out stopper portions to cylindrical batteries in a state of being coupled to the holder body. In a state in which the sub holder is coupled to the holder body, in the cell module, the push rods thrust stopper portions against cylindrical batteries, and press the surfaces of cylindrical batteries arranged in holding spaces.

Cell module

A battery pack includes a plurality of batteries that are chargeable and dischargeable, a battery holder that arranges the batteries at predetermined positions, and a bus bar that is a metal sheet fixed to electrode terminals of the batteries. The bus bar includes: a plurality of fixed terminals connected with the electrode terminals of the batteries; a base that connects the plurality of batteries with each other through the plurality of fixed terminals in series and/or in parallel; and fuse links that include ends connected with the fixed terminals, respectively, and roots that are connected with the base. The battery pack further includes a heat insulating member that tightly covers surfaces of the fuse links, and surfaces of the fixed terminals connected with the fuse links, respectively.

Growing community of inventors

Hyogo, Japan

Satoshi Kawakami