| CPC H01M 10/6568 (2015.04) [H01M 10/613 (2015.04); H01M 10/647 (2015.04); H01M 50/209 (2021.01); H01M 50/3425 (2021.01); H01M 50/51 (2021.01)] | 8 Claims |
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1. A battery pack, comprising:
a box body which is provided with a liquid inlet port and a liquid outlet port;
a top cover which is located at a top of the box body; and
a plurality of battery modules which are located in the box body,
wherein the battery module comprises a plurality of stacked battery cells, a top plate is arranged at tops of the plurality of battery cells, end plates are arranged at two opposite sides in a lengthwise direction, flow channel plates are arranged at two opposite sides in a widthwise direction, a heat exchange structure is arranged below, and the plurality of battery cells are coated with the top plate, the end plates, the flow channel plates and the heat exchange structure to form a sealed space, so as to accommodate a heat exchange medium;
a plurality of first flow channel grooves facing the lengthwise direction are formed in one side close to the battery cells, of the flow channel plate, one end of the first flow channel groove communicates with the liquid inlet port, the other end of the first flow channel groove communicates with the liquid outlet port, and groove openings of the first flow channel grooves are abutted against side walls of the battery cells to form flow channels;
the heat exchange structure communicates with the liquid inlet port, a bottom of the sealed space communicates with the heat exchange structure, and a top of the sealed space communicates with the liquid outlet port; and
a top of one side of the flow channel plate communicates with the liquid inlet port, a top of the other side of the flow channel plate communicates with the liquid outlet port; turbulent-flow blocks are arranged on the flow channel plates, located at end parts of the first flow channel grooves, and arranged in close proximity to the liquid inlet port; and in the plurality of first flow channel grooves, a cross-section dimension of the turbulent-flow block in the first flow channel groove located at a top is a first dimension, a cross-section dimension of the turbulent-flow block in the first flow channel groove located at a bottom is a second dimension, a cross-section dimension of the turbulent-flow block in the first flow channel groove located at a middle part is a third dimension, and the first dimension is greater than the second dimension and greater than the third dimension.
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