Harmonica-shaped tube structure, heat exchanger and battery pack assembly

The invention relates to a harmonica-shaped tube structure, a heat exchanger and a battery pack assembly. The harmonica-shaped tube structure comprises a harmonica-shaped tube body with a plurality of heat exchange runners and a temperature equalizing plate body which is integrally formed with the harmonica-shaped tube body and located on one side of the harmonica-shaped tube body in the first direction. According to the harmonica-shaped tube structure disclosed by the invention, the harmonica-shaped tube body with the heat exchange runner and the uniform-temperature plate body for increasing the heat exchange area are integrally formed, and the uniform-temperature plate body is positioned on one side of the harmonica-shaped tube body in the thickness direction, so that heat conduction of the power battery is met. The integrally-formed harmonica-shaped tube structure can solve the problem that the flatness is difficult to meet the requirement due to the fact that the area of the uniform temperature plate is t