SECONDARY BATTERY AND ELECTRIC DEVICE

Disclosed in the present application are a secondary battery and an electric device. The secondary battery comprises an electrode assembly and a housing for accommodating the electrode assembly. A positive electrode sheet of the electrode assembly comprises: a positive electrode current collector and a bottom coating applied on the surface of the positive electrode current collector, wherein in the winding direction of the electrode assembly, the bottom coating comprises a first bottom coating and a second bottom coating; a positive electrode active material layer is located on the surface of the first bottom coating, the second bottom coating is provided on at least part of the surface of the outermost ring of the electrode assembly, and no positive electrode active material layer is provided on the surface of the second bottom coating; the second bottom coating is further provided with a raised area and a recessed area, and the area ratio of the raised area in the second bottom coating is 50%-80%. According