Otsuka Techno Corporation

Ostuka Techno Corporation

Shiro Shibuya

Yoshihiro Nakanishi

Kazuo Tanabe

Kenta Kida

The circuit breaker is fabricated by an assembly step that makes a circuit breaker assembly with a moving contact metal plate, stationary contact metal plate, and bimetallic strip disposed in prescribed locations in an external case; and an anneal step that introduces the circuit breaker assembly made in the assembly step into an anneal oven, heats the circuit breaker assembly in the anneal oven and then cools it to anneal both the moving contact metal plate and the bimetallic strip and produce a heat-treated circuit breaker.

Method of manufacturing a circuit breaker and method of manufacturing a battery pack including the circuit breaker

A breaker includes a fixed metal plate, a moving metal plate, a bimetal, and a heater. The fixed plate includes a fixed contact in a space of an exterior case having an electrically-insulating case and an exterior metal plate. The exterior plate and the fixed plate are arranged opposed to each other, and fixed to the electrically-insulating case. The bimetal has a convex shape, and is arranged between the heater and the moving plate. The electrically-insulating case includes first and second outer walls and protruding from the both ends of the case. A central part of the fixed plate is fixed to the first outer wall, and a part of moving plate is fixed to the second outer wall. The exterior plate closes the opening of the space.

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Okayama, Japan

Shiro Shibuya