Battery pack manufacturing device

The battery pack includes a plurality of battery cells stacked in a first direction, each of the battery cells includes a terminal on a surface facing a second direction intersecting the first direction, and a bus bar is welded to the terminal. A manufacturing apparatus disclosed in the present specification is provided with: a plurality of pressing pieces which are arranged in a first direction and have tips facing respective terminals with bus bars therebetween in a second direction; a rotor that extends in a first direction, is rotated by an actuator, engages with the plurality of pressing pieces, and presses the plurality of pressing pieces against the bus bar when rotating around a shaft core; and a welder that welds the bus bar and the terminal. The welder welds the bus bar onto the terminal while the rotor presses the bus bar onto the terminal. 电池组具备在第一方向上层叠的多个电池单体，各电池单体在朝向与第一方向相交的第二方向的面上具备端子，并且在端子上焊接有汇流条。本说明书公开的制造装置具备：多个加压片，其沿着第一方向排列，且第二方向上的前端隔着汇流条与相应的端子相对；转子，其沿第一方向延伸且通过致动器进行旋转，该转子与多个加压片卡合，并在绕轴芯旋转时将多个