SECONDARY BATTERY AND ELECTRIC DEVICE

The invention provides a secondary battery (4) and a power utilization device, the secondary battery (4) comprises a positive plate and a negative plate, the total capacity of the positive plate is P, the total capacity of the negative plate is N, and N and P meet the condition that N/P is less than 1; the negative plate comprises a current collector, and a first negative active layer, an insulating material layer and a second negative active layer which are sequentially arranged on the surface of the current collector; the secondary battery (4) has both high energy density and excellent cycle performance.