Diaphragm, electrode assembly, battery and electric equipment

The utility model relates to the technical field of battery production, in particular to a diaphragm, an electrode assembly, a battery and electric equipment. The diaphragm comprises a base material, a first coating on at least one surface of the base material and a reinforcing layer arranged on the first coating, the reinforcing layer is of a hollow structure and covers at least part of the surface of the first coating, and the coverage rate of the reinforcing layer on the first coating is 0.1%-5%. According to the diaphragm, the first coating is arranged on at least one surface of the base material, the hollow reinforcing layer is arranged on the first coating, and the reinforcing layer covers at least part of the surface of the first coating, so that the rigidity of the diaphragm can be improved through the reinforcing layer, and the edge curling probability of the diaphragm in the winding process is reduced. Besides, the reinforcing layer is arranged to be of a hollow structure, so that the reinforcing la