| CPC H01M 50/20 (2021.01) [H01M 10/613 (2015.04); H01M 10/625 (2015.04); H01M 10/643 (2015.04); H01M 10/6567 (2015.04); H01M 50/394 (2021.01); H01M 2220/20 (2013.01)] | 24 Claims |
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1. A battery pack comprising:
battery cells comprising first battery cells and second battery cells, each of the first and second battery cells comprising a first end portion and a second end portion that are opposite each other in a length direction of the respective battery cell, adjacent first end portions being arranged in a stepped manner; and
a case providing an accommodation space in which the battery cells and a cooling fluid to cool the battery cells are configured to be accommodated, the case comprising a first cover covering the first end portions of the battery cells, the first cover being arranged along a height difference between the first end portions of the first and second battery cells and defining a height difference space, corresponding to the height difference, on an outer side of the first cover, the height difference space defining a recessed portion extending from a first region thereof to a second region thereof, the first and second regions of the recessed portion respectively overlapping the first end portions of adjacent second battery cells of the second battery cells.
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23. A battery pack comprising:
battery cells comprising first battery cells and second battery cells, each of the first and second battery cells comprising a first end portion and a second end portion that are opposite each other in a length direction of the respective battery cell;
a case providing an accommodation space in which the battery cells and a cooling fluid to cool the battery cells are configured to be accommodated, the case comprising a first cover covering the first end portions of the battery cells, the first cover being arranged along a height difference between the first end portions of the first and second battery cells and defining a height difference space, corresponding to the height difference, on an outer side of the first cover; and
a first tab plate on the outer side of the first cover to electrically connect the first end portions of the first and second battery cells, the first tab plate comprising a main portion on the first cover, and first and second contact portions protruding to different depths from the main portion toward the first end portions of the first and second battery cells, wherein the first and second contact portions are thinner than the main portion.
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24. A battery pack comprising:
battery cells comprising first battery cells and second battery cells, each of the first and second battery cells comprising a first end portion and a second end portion that are opposite each other in a length direction of the respective battery cell, adjacent first end portions being arranged in a stepped manner; and
a case providing an accommodation space in which the battery cells and a cooling fluid to cool the battery cells are configured to be accommodated, the case comprising a first cover covering the first end portions of the battery cells, the first cover being arranged along a height difference between the first end portions of the first and second battery cells and defining a height difference space, corresponding to the height difference, on an outer side of the first cover, the height difference space defining a recessed portion extending from a first region thereof to a second region thereof, the first and second regions of the recessed portion respectively overlapping the first end portions of adjacent second battery cells of the second battery cells,
wherein the first cover comprises:
a protruding portion that relatively protrudes to cover the first end portion of the first battery cell; and
the recessed portion that is relatively recessed to cover the first end portion of the second battery cell.
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