Abstract: A battery pack and vehicle are provided. The battery pack includes a plurality of layers of cell groups. Each of the layers of cell groups includes at least one sub-cell group. The at least one sub-cell group of each of the layers of cell groups includes a plurality of cells. The plurality of cells in each sub-cell group of the plurality of layers of cell groups extends in a first direction. The plurality of cells in each sub-cell group of the plurality of layers of cell groups is arranged in a second direction. The plurality of layers of cell groups are stacked in a third direction. The first direction, the second direction, and the third direction are different.

Abstract: In one aspect, a battery pack has a cooling assembly. The cooling assembly includes a first flow channel structure and a second flow channel structure. A liquid outlet of the first flow channel structure is configured to be in communication with a liquid inlet of the second flow channel structure; and the first flow channel structure is configured to dissipate heat for a non-pole region of a battery set, and the second flow channel structure is configured to dissipate heat for a pole region of the battery set.