| CPC H01M 50/233 (2021.01) [H01M 50/209 (2021.01); H01M 2220/10 (2013.01); H01M 2220/20 (2013.01)] | 12 Claims |
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1. A battery system comprising:
a battery stack including a plurality of rectangular battery cells that are stacked;
a pair of end plates placed at both ends of the battery stack; and
a binding bar that connects the pair of end plates together to fix the battery stack in a compressed state in a stacking direction, each of the end plates including
plates placed on both surfaces of the end plate, and
a plate-shaped block laminated between the plates, wherein
the plates each include an outer plate placed on an outer surface among the both surfaces and an inner plate placed on an inner surface among the both surfaces,
the plate-shaped block includes
dual-side blocks placed on both sides and separated from each other, and
an intermediate block provided in a tapered groove between the dual-side blocks,
the tapered groove has a taper shape that gradually increases in width from an outside to an inside of the end plate,
the intermediate block is placed in close contact with facing surfaces of the tapered groove in a slidable manner,
the dual-side blocks are fixed on inner surfaces of the plates, and
the intermediate block pressed by the battery stack is press-fitted into the tapered groove and applies tensile stress to the outer plate and the inner plate via the dual-side blocks.
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