| CPC H01M 50/20 (2021.01) [H01M 50/24 (2021.01); H01M 50/502 (2021.01); H01M 2220/20 (2013.01)] | 18 Claims |
|
1. A battery pack, comprising:
battery cells;
a potting resin on the battery cells at positions corresponding to central portions of upper end portions or lower end portions of the battery cells in a height direction of the battery cells;
an adhesive resin on the battery cells at positions corresponding to edge portions surrounding the central portions of the upper end portions or the lower end portions of the battery cells;
bus bars that electrically connect two of the battery cells to each other, the bus bars being coupled to the central portions of the upper end portions or the lower end portions of the battery cells; and
a circuit board on the bus bars,
wherein:
the potting resin covers coupling structures between the bus bars and the upper end portions or the lower end portions of the battery cells such that the potting resin is directly on a connection between the bus bars and the battery cells,
the bus bars each include:
coupling pieces at both ends thereof that are coupled to the upper end portions of the battery cells, the coupling pieces being flat and coplanar with one another,
a protruding connection piece that connects the coupling pieces, the protruding connection piece being flat and in a plane parallel to a plane of the coupling pieces and being spaced apart from the coupling pieces in the height direction of the battery cells, and
bent portions that extend at an inclined angle with respect to the planes of the coupling pieces and the protruding connection pieces and that connect the coupling pieces with the protruding connection piece at a center of the bus bar in a bent shape and space the protruding connection piece apart from the battery cells in the height direction of the battery cells, and
the circuit board includes escape holes that each accommodate the protruding connection piece such that the plane of the protruding connection piece is at a level between a lower side of the circuit board and an upper side of the circuit board in the height direction.
|