Patent ID: 11631852

Abstract:
A secondary battery, a preparation method thereof, and an apparatus including the secondary battery are described. Specifically, the secondary battery includes a negative-electrode plate, where the negative-electrode plate is of a multi-layer structure, and the multi-layer structure sequentially includes: a negative-electrode current collector, a primer layer, and a negative-electrode film layer; the negative-electrode film layer includes a first negative-electrode film layer and a second negative-electrode film layer, and the first negative-electrode film layer is located between the primer layer and the second negative-electrode film layer; and the first negative-electrode film layer includes a first negative-electrode active material, the first negative-electrode active material includes first artificial graphite, at least some particles in the first artificial graphite are secondary particles, and a quantity proportion A of the number of the secondary particles to a total number of particles of the first negative-electrode active material satisfies A≥50%.