Battery pack

1. A battery pack comprising:

a plurality of battery modules arranged side by side along a first direction orthogonal to an up-down direction;

a housing case configured to house the plurality of battery modules;

a wire harness electrically connected to the plurality of battery modules and routed in the housing case; and

a reinforcing portion provided within the housing case and configured to reinforce the housing case,

the reinforcing portion including a plate-shaped portion arranged separately from the plurality of battery modules and extending along the first direction,

the plate-shaped portion having a lower surface facing the plurality-of-battery-modules side, and an upper surface located on an opposite side of the lower surface,

the wire harness being routed along the upper surface of the plate-shaped portion, wherein

the reinforcing portion includes a plurality of holding portions configured to hold the plate-shaped portion,

the plurality of holding portions are spaced apart from one another and arranged side by side in the first direction, and

each of the holding portions includes abase portion extending to intersect with the plate-shaped portion on a lower side of the plate-shaped portion and fixed to the housing case, a rising wall portion rising toward the plate-shaped portion from the base portion in an area overlapping with the plate-shaped portion when viewed from above, and a top portion provided on an upper end side of the rising wall portion and fixed to the plate-shaped portion.

2. The battery pack according to claim 1 , wherein

each of the battery modules includes a cell stack and a cover member configured to cover at least a part of the cell stack,

the cell stacks, each of which is arranged between the base portions adjacent to each other, are arranged side by side along the first direction,

the cover member includes a bracket portion provided to overlap with the base portion located on at least one of both sides of the cell stack in the first direction, and

the bracket portion is fixed to the housing case, together with the base portion.

3. The battery pack according to claim 1 , wherein

the plurality of battery modules include a plurality of first battery modules spaced apart from one another and arranged side by side in the first direction, and at least one second battery module arranged above the plurality of first battery modules,

the plate-shaped portion includes a first plate-shaped portion extending along the first direction to overlap with the plurality of first battery modules in an area exposed from the at least one second battery module, and a second plate-shaped portion extending along the first direction to overlap with at least a part of the at least one second battery module,

the wire harness includes a first wire harness electrically connected to the plurality of first battery modules in the area exposed from the at least one second battery module, and a second wire harness electrically connected to the at least one second battery module,

the first wire harness is routed along an upper surface of the first plate-shaped portion, and

the second wire harness is routed along an upper surface of the second plate-shaped portion.

4. The battery pack according to claim 3 , further comprising

a fixing plate having the at least one second battery module fixed thereto, wherein

the fixing plate is arranged between the plurality of first battery modules in an area overlapping with the at least one second battery module in the up-down direction and the at least one second battery module, and

the first plate-shaped portion is connected to the fixing plate.

5. The battery pack according to claim 1 , wherein

the plate-shaped portion overlaps with central portions of the plurality of battery modules in a second direction orthogonal to the up-down direction and the first direction.