Method and device for determining residual electric quantity of electric vehicle

The embodiment of the invention discloses a method and device for determining the remaining capacity of an electric vehicle. The determination method comprises the following steps: acquiring current and voltage of a battery of the electric vehicle in a charging and discharging state; determining the capacity corresponding to the current according to the current of the battery in the charge-discharge state; determining the residual electric quantity of the battery in an ampere-hour integral state according to the capacity, and determining the residual electric quantity of the battery in a limit value state according to the current and the voltage; and according to the residual electric quantity in the ampere-hour integral state and the residual electric quantity in the limit value state, determining the preliminary corrected residual electric quantity of the electric vehicle, and determining the residual electric quantity of the electric vehicle according to the preliminary corrected residual electric quantity