| CPC H01M 50/20 (2021.01) [H01M 50/502 (2021.01); H01M 2220/20 (2013.01)] | 17 Claims |
|
1. A battery pack, comprising:
battery cells bounded by an imaginary rectangular envelope including a pair of long sides and a pair of short sides extending to linearly surround an outer periphery of the battery cells across an outer circumference of the battery cells;
bus bars that electrically connect at least some of the battery cells to each other, the bus bars being arranged to extend in a zig-zag shape along a short side direction of the imaginary rectangular envelope;
first and second output terminals arranged along a long side direction of the imaginary rectangular envelope and respectively adjacent to the short sides of the imaginary rectangular envelope, the first and second output terminals being connected to the bus bars; and
first and second fuse terminals between the first and second output terminals, the first and second fuse terminals being connected to the bus bars,
wherein:
the battery cells include a low voltage group including a first number of battery cells and a high voltage group including a second number of battery cells, the second number being higher than the first number,
the bus bars include a low voltage portion connecting the battery cells of the low voltage group and a high voltage portion connecting the battery cells of the high voltage group,
the low voltage portion and the high voltage portion are formed asymmetrically with respect to a virtual line that crosses equidistantly between the first and second fuse terminals and equidistantly between the first and second output terminals, and is parallel to the short side direction of the imaginary rectangular envelope to divide the battery pack into a high voltage side and a low voltage side, and
the high voltage portion includes a high voltage deflection portion that crosses the virtual line toward the low voltage portion in the long side direction of the imaginary rectangular envelope such that at least some of the battery cells of the high voltage group are completely on the low voltage side of the virtual line.
|