Sanyo Electric Co., Ltd.

Kuroudo Hayakawa

Tomokazu Yamanaka

A method of manufacturing a secondary battery including a negative electrode collector connected to a layered negative electrode core body exposed portion by welding, the method including a first step of disposing a core body connection of the negative electrode collector on an outer surface side of a layered negative electrode core body exposed portion so that a recess in the core body connection opposes the layered negative electrode core body exposed portion, a second step of pressing, with a pressing member, a portion in the core body connection where the recess is formed, forming a deformed portion, and contacting the deformed portion to the layered negative electrode core body exposed portion, and a third step of abutting an electrode for resistance welding against the negative electrode collector and resistance welding the negative electrode collector and the layered negative electrode core body exposed portion to each other.

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Hyogo, Japan

Kuroudo Hayakawa