POWER SUPPLY SYSTEM

A power supply system includes a plurality of batteries, a cooling portion through which a refrigerant for cooling the plurality of the batteries flows, a housing that has a bottom plate, a top plate, and side walls, the housing accommodating the plurality of the batteries and the cooling portion, and a compressor configured to pump the refrigerant to the cooling portion. In the housing, a strength member that extends in a direction in which the side walls face each other and reinforces the housing is mounted on the bottom plate or the top plate. The compressor is disposed in a position in which the compressor and the strength member are overlapped in the upright direction of the side walls.