A battery unit comprises a battery case, and a plurality of battery modules stored and held in the battery case. The battery case includes a bottom wall and a partition. The plurality of battery modules are mounted on the bottom wall. The partition is provided and erected on the bottom wall. The partition separates the battery modules adjacent in a second direction traversing a first direction. The first direction is oriented from a first end of the battery case at which an inlet is formed to a second end at which an outlet is formed. The partition extends along a plane where the battery modules face each other in the second direction along the battery modules. The partition is inclined in the extending direction.
1. A battery unit comprising:
a battery case having an inlet to let in a cooling gas and an outlet to let out the gas; and
a plurality of battery modules stored and held in the battery case, the battery case including:
a bottom wall on which the plurality of battery modules are mounted; and
a partition which is provided on the bottom wall and which separates the battery modules adjacent in a second direction traversing a first direction, the first direction being oriented from a first end of the battery case at which the inlet is formed to a second end at which the outlet is formed, the partition extending along a plane where the battery modules face each other in the second direction along the battery modules and being inclined in the extending direction.
2. The battery unit according to claim 1 , wherein the partition becomes gradually lower toward the center of the battery case in the first direction.
3. The battery unit according to claim 1 , wherein,
a plurality of partitions identical to the partition are provided,
an inlet side battery module group and an outlet side battery module group are arranged in the battery case, the inlet side battery module group including a plurality of battery modules disposed on the side of the first end, the outlet side battery module group including a plurality of battery modules disposed on the side of the second end,
a partition of the plurality of partitions, which separates the battery modules in the inlet side battery module group becomes gradually lower toward the center of the battery case in the first direction, and
a partition of the plurality of partitions, which separates the battery modules in the outlet side battery module group becomes gradually lower toward the center of the battery case in the first direction.