Each of the plurality of battery heat radiation units includes, a battery module, at least one heat pipe thermally connected at a first end of the heat pipe to one surface of the battery module and protruding from the battery module at a second end of the heat pipe, at least one metal heat exchanger plate thermally connected to one surface of the battery module, and at least one heat radiation portion provided at the second end of the heat pipe, the air blowing portion blows air to the heat radiation portion, and one heat radiation portion in the plurality of battery heat radiation units is misaligned with other heat radiation portions in the plurality of battery heat radiation units as viewed from the air blowing portion side.