Preparation method of all-solid-state battery unit

The invention discloses a preparation method of an all-solid-state battery unit, and belongs to the field of manufacturing of solid-state battery devices. A model of which the stacking form is positive electrode material-solid electrolyte-negative electrode material is defined as the all-solid-state battery unit. The invention solves the technical problems of poor contact between the pole piece and the electrolyte, difficulty in improving the density of the solid electrolyte and the like which hinder the manufacturing of a solid-state battery device in the manufacturing process of the solid-state battery. The method comprises the following steps: 1, selecting solid electrolyte powder, anode powder and cathode powder as raw materials; 2, constructing a solid-state battery unit digital model, performing two-dimensional slicing on the model, and importing structural data into selective laser melting forming equipment; 3, setting selective laser melting forming machining technological parameters, and performing e