ASSEMBLED BATTERY

Provided is a battery pack which has good ease of assembly and which can be efficiently cooled. The battery pack includes: multiple first housings having main circuit terminals; main circuit wires connecting the main circuit terminals to each other; multiple plates which face a prescribed surface of the first housings and which are provided cooling paths having a refrigerant inlet and a refrigerant outlet; cooling piping connecting the cooling paths with each other; and a second housing which holds the multiple first housings in the direction of depth perpendicular to the plate surface and which is provided with a common terminal, a cooling piping inlet, and a cooling piping outlet. The main circuit terminals, the main circuit wires, and the common terminal are disposed at the top in the height direction, and the refrigerant inlet, the refrigerant outlet, the cooling piping, the cooling piping inlet, and the cooling piping outlet are disposed at the bottom in the height direction of the second housing.