The invention provides a short-knife battery, a preparation method, a battery module and a power utilization device. The short-knife battery comprises a shell, a
battery cell and a heat conduction structure, the shell is provided with a containing cavity, and
electrolyte is injected into the containing cavity. And the
battery cell is arranged in the accommodating cavity and is soaked in the
electrolyte. And the heat conduction structure is sleeved on the
battery cell. The heat conduction structure comprises a first face and a second face which are oppositely arranged. The first surface is connected to the battery
cell, and the second surface abuts against the inner wall. The heat conduction coefficient of the heat conduction structure is larger than or equal to that of the
electrolyte. In the related technology, the heat generated by the battery
cell is transferred to the aluminum shell through the electrolyte in the accommodating cavity for heat dissipation. On the basis, the heat generated by the battery
cell of the short-knife battery is transferred to the shell through the heat conduction structure for heat dissipation, so that the speed of
heat transfer between the battery cell and the shell is increased, the heat dissipation speed of the battery cell is further increased, the probability of
thermal runaway of the battery is reduced, and the service life of the battery is prolonged.