Hitachi Vehicle Energy, Ltd.

Hitachi Automotive Systems, Ltd.

Mitsuru Koseki

Takuro Tsunaki

Yutaka Sato

Kinya Aota

Naoki Kimura

Kouichi Kajiwara

Fujio Hirano

Keisuke Sawada

Sho Saimaru

Takenori Ishizu

Kiyoyuki Sekine

Ryuji Kono

Hideyuki Shibanuma

Hidemasa Kawai

Ryuji Kohno

A secondary battery includes a battery casing accommodating an electricity-generating element group, and a battery cover having through-holes and sealing an opening in the battery casing. A first face at one end of each of positive and negative electrode connecting plates, which are each formed from a single plate of metal, is connected to a non-coated section of the electricity-generating element group. A second face at the other end of each of the positive and negative electrode connecting plates is a face onto which a busbar is welded, and the second face is exposed outward from one of the through-holes. Insulating base materials are interposed between THE positive and negative electrode connecting plates and an outer circumference of each through-hole, the insulating base materials and the battery cover are connected by brazing, and the insulating base materials and the positive and negative electrode connecting plates are connected by brazing.

Secondary battery and secondary battery module

Battery

Growing community of inventors

Fukaya, Japan

Mitsuru Koseki