Sanyo Electric Co., Ltd.

Hiromasa Nishijima

Ryoichi Wakimoto

Yasuhiro Yamauchi

A rectangular secondary battery according to the present invention includes an electroconductive member, a first insulating member, a pressure-sensitive circuit breaker that includes an inversion plate and a positive electrode current collector. The electroconductive member has a first outer side surface and a second outer side surface that face away from each other. The first insulating member includes a pair of short side walls. One of the short side walls is located outside of the first outer side surface and presses the first outer side surface toward the second outer side surface. The other short side wall is located outside of the second outer side surface and presses the second outer side surface toward the first outer side surface.

Rectangular secondary battery and method of making the same

A prismatic secondary battery that includes a wound electrode body including a wound positive electrode core body exposed portion in one edge portion and a wound negative electrode core body exposed portion in the other edge portion. A width of the wound electrode body is 110 to 160 mm, a height thereof is 50 to 70 mm, and a thickness is 10 to 30 mm. A distance from an undersurface of a base portion of a positive electrode collector to a weld between a positive electrode connection portion and the positive electrode core body exposed portion is 10 to 25 mm, and a distance from an undersurface of a negative electrode base portion of a negative electrode collector to a weld between a negative electrode connection portion and the negative electrode core body exposed portion is 10 to 25 mm.

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Osaka, Japan

Hiromasa Nishijima