Abstract: Provided are a phase-change microcapsule, a separator, an electrode plate, a battery, and an electrical device. The phase-change microcapsule includes: a core and an insulative heat-conducting wall material wrapped around the core. The core includes a first phase-change component and a second phase-change component. The first phase-change component is paraffin with a melting point of 37° C. to 42° C. The second phase-change component is paraffin with a melting point of 65° C. to 75° C. A melting point of the insulative heat-conducting wall material is greater than 75° C. A mass ratio between the first phase-change component and the second phase-change component is 35:(45 to 77). The phase-change microcapsule is applied to the battery in the form of a coating layer. The specified first phase-change component and second phase-change component of a specified melting point are mixed at a specified ratio in the core.