| CPC H01M 50/291 (2021.01) [H01M 4/131 (2013.01); H01M 4/364 (2013.01); H01M 10/0525 (2013.01); H01M 10/0585 (2013.01); H01M 10/0587 (2013.01); H01M 50/103 (2021.01); H01M 50/119 (2021.01); H01M 50/209 (2021.01)] | 8 Claims |
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8. An assembled battery comprising:
a plurality of rectangular batteries; and
a plurality of spacers disposed between adjacent two rectangular batteries, respectively, wherein:
each of the plurality of rectangular batteries comprises:
an electrode winding having a positive electrode plate including a positive electrode mixture layer and a positive electrode core body exposed portion, and a negative electrode plate including a negative electrode mixture layer and a negative electrode core body exposed portion, wound together with a separator between the positive electrode plate and the negative electrode plate, the electrode winding having a flat part with a flat outer surface and two curved parts with curved outer surfaces;
a non-aqueous electrolyte; and
a battery case containing the electrode winding and the non-aqueous electrolyte,
each of the plurality of spacers has a board and multiple ribs protruding from at least one side of the board,
the ribs face the flat part of the electrode winding and extend in a direction perpendicular to the winding axis of the electrode winding,
when the height of the flat part of the electrode winding is 100, the length of the ribs is 60 or more and 100 or less,
when the width of the ribs is A and the interval between the adjacent ribs is B, 2≤B/A≤10, and
the multiple ribs are only formed in portions facing the positive electrode mixture layer and the negative electrode mixture layer.
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