Battery pack

A battery pack mounted on a vehicle, the battery pack comprising:

• at least one cell stack;
• a first duct and a second duct configured to feed cooling air toward the at least one cell stack;
• and
• a housing case configured to house the at least one cell stack, the first duct and the second duct,
• the first duct and the second duct extending in a first direction and being spaced apart from each other in a second direction, the first direction being parallel to a front-back direction of the vehicle in a mounted state in which the battery pack is mounted on the vehicle, the second direction being parallel to a width direction of the vehicle in the mounted state,
• the first duct being arranged on an outer side of the at least one cell stack on one side in the second direction,
• the second duct being arranged on an outer side of the at least one cell stack on the other side in the second direction,
• wherein:
• the at least one cell stack includes a plurality of cell stacks,
• the plurality of cell stacks are spaced apart from one another and arranged side by side in the first direction,
• a plurality of gaps are provided, so that one of the gaps is provided between each of the cell stacks adjacent to each other, and the plurality of the gaps are spaced apart from one another and arranged side by side in the first direction,
• the first duct includes:
• (i) a first main duct extending along the first direction, and (ii) a first sub duct branching off from the first main duct,
• the second duct includes:
• (i) a second main duct extending along the first direction, and (ii) a second sub duct branching off from the second main duct,
• the first sub duct extends toward the second main duct,
• the second sub duct extends toward the first main duct,
• the first sub duct is apart from the second main duct and the second sub duct is apart from the first main duct,
• the first sub duct and the second sub duct are arranged in the gaps, and
• the gap where the first sub duct is arranged and the gap where the second sub duct is arranged are alternately arranged side by side along the first direction,
• the battery pack further comprising:
• a connection member configured to electrically serially connect the plurality of cell stacks, wherein
• a first space is provided between a tip of the first sub duct and the second main duct,
• a second space is provided between a tip of the second sub duct and the first main duct, and
• the connection member includes a first connection portion configured to extend through the first space between the tip of the first sub duct and the second main duct and extend across the gap where the first sub duct is arranged so as to connect the cell stacks adjacent to each other, and a second connection portion configured to extend through the second space between the tip of the second sub duct and the first main duct and extend across the gap where the second sub duct is arranged so as to connect the cell stacks adjacent to each other.