Separator, battery, energy storage device, and electric equipment comprising the same

An energy storage device comprising a box body and at least one battery accommodated in the box body;

• wherein the battery comprises a positive electrode sheet, a negative electrode sheet, an electrolyte, and a separator located between the positive electrode sheet and the negative electrode sheet;
• wherein the separator comprises a substrate film and a dot-coated adhesive layer, the dot-coated adhesive layer being disposed on at least one surface of the substrate film;
• the dot-coated adhesive layer comprises a plurality of adhesive dots distributed in a dot matrix, the adhesive dots have a first annular structure, a distance between an outer edge of the first annular structure and a center of the adhesive dot is R1, a distance between an inner edge of the first annular structure and the center of the adhesive dot is R2, and 0.15≤1−R2/R1≤0.35;
• the dot-coated adhesive layer comprises a polymer binder and an auxiliary agent, and the auxiliary agent comprises at least one of a water-soluble coupling agent and a phosphate-based auxiliary agent.