| CPC H01M 50/209 (2021.01) [H01M 10/625 (2015.04); H01M 10/658 (2015.04); H01M 50/242 (2021.01); H01M 50/249 (2021.01); H01M 50/264 (2021.01); H01M 50/289 (2021.01); H01M 50/291 (2021.01); H01M 50/293 (2021.01); H01M 2220/20 (2013.01)] | 9 Claims |
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1. A power supply device comprising:
a battery block including a plurality of battery cells stacked in a thickness with a separator interposed between corresponding battery cells among the plurality of battery cells;
a pair of end plates disposed on respective end faces of the battery block; and
a binding bar coupled to the pair of end plates to fix the battery block in a compressed state together with the end plates,
the separator including:
a heat-insulating sheet; and
an elastic layer layered on a surface of the heat-insulating sheet,
the elastic layer including an elastic protrusion that is partially in adhesion to a surface of a case of a corresponding battery cell among the corresponding battery cells and is deformed by expansion of the corresponding battery cell,
wherein a deformation space is provided between the corresponding battery cell and the separator for the elastic protrusion pressed by the corresponding battery cell to be displaced in an outer peripheral direction orthogonal to a pressing direction,
wherein the elastic layer is provided at a central part of the elastic layer, excluding an upper end part and a lower end part of the elastic layer, with an elastic protrusion that protrudes to be in adhesion to the corresponding battery cell,
wherein the elastic layer includes a plurality of elastic protrusions formed in a row along the central part each being the elastic protrusion, and
where the deformation space is provided as a gap formed between each of the elastic protrusions adjacent to each other among the plurality of elastic protrusions.
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