Method for determining battery capacity of pure electric vehicle and related device

The invention discloses a battery capacity determination method of a pure electric vehicle and a related device. The method comprises steps of determining a road condition type of the pure electric vehicle in single cycle operation according to an operation scene of the pure electric vehicle; respectively calculating the braking energy consumed or recycled by the pure electric vehicle under each road condition type, and according to the braking energy consumed or recycled by the pure electric vehicle under each road condition type, calculating to obtain the battery capacity consumed by the pure electric vehicle in a single cycle operation; according to the cycle operation frequency of the pure electric vehicle in the unit time and the battery capacity needing to be consumed by the pure electric vehicle in the single cycle operation, the battery capacity needing to be consumed by the pure electric vehicle in the unit time being obtained through calculation; and determining that the capacitance capacity of the