US 2025/0015422 A1Published application

Bipolar Storage Battery

AssigneesThe Furukawa Battery Co., Ltd., Furukawa Electric Co., Ltd.

InventorsKenji Hirota, Yoshinobu Taira, Hiroki Tanaka, Yasuo Nakajima

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Abstract

Described is a bipolar storage battery with sufficient stiffness to withstand a force of expansion of cells due to gas generated by corrosion or a force of an impact from the outside, while ensuring air tightness inside the cells and mechanical strength. The battery includes a plurality of cell members stacked with spacing, each including a positive electrode, a negative electrode, and a separator interposed therebetween. The battery includes a space forming member forming a plurality of spaces individually housing the cell members and including a substrate and a frame. The battery includes an outer reinforcing wall facing an outer wall face of the frame and extending from the substrate in a stacking direction of the cell members and the space forming member. An outer hollow space is formed between the outer reinforcing wall and the outer wall face.

Claims19

Dependent claims

A bipolar storage battery, comprising:

a plurality of cell members stacked with spacing, each of the cell members including a positive electrode including a positive electrode current collector and a positive active material layer, a negative electrode including a negative electrode current collector and a negative active material layer, and a separator interposed between the positive electrode and the negative electrode;
a space forming member forming a plurality of spaces individually housing the plurality of cell members, the space forming member including a substrate covering at least one of the positive electrode side or the negative electrode side of each of the cell members, and a frame surrounding a side face of each of the cell members;
and
an outer reinforcing wall facing an outer wall face of the frame and extending from the substrate in a stacking direction of the plurality of cell members and the space forming member, wherein an outer hollow space is formed between the outer reinforcing wall and the outer wall face.

1 more element

Dependencies are inferred from the claim text.