Preparation method of battery, battery and power utilization device

The invention relates to a preparation method of a battery, the battery and a power utilization device. The preparation method comprises the following steps: acquiring a positive pole piece; obtaining a negative pole piece; the surfaces of the two sides of the negative pole piece are coated with solid electrolyte; obtaining a first film, wherein the first film is a hot melt adhesive; sequentially and alternately stacking the positive pole pieces and the negative pole pieces coated with the solid electrolyte on the first film to form a multi-pole piece structure; wherein the number of the negative pole pieces is n + 1, the number of the positive pole pieces is n, and n is greater than or equal to 1; obtaining a second film; the second film is stacked on the top side, away from the first film, in the multi-pole-piece structure, and a multi-pole-piece stacked body is obtained; and carrying out hot pressing treatment on the multi-pole piece stack body. According to the preparation method of the battery, the batte