Method for determining energy of power battery of electric automobile under circulating working conditions

The invention relates to a method for determining energy of a power battery of an electric automobile under circulating working conditions. The method comprises the following steps of breaking down each circulating working condition of the pure electric automobile into a uniform speed working condition, an acceleration working condition and a brake working condition; respectively determining the energy requirements under each of the uniform speed working condition and acceleration working condition; determining the driving energy consumption of the whole automobile under the uniform speed working condition and acceleration working condition, so as to obtain the energy requirement of a power battery pack. The method has the advantages that in the early design period of the pure electric automobile, the energy of the power battery is calculated according to the endurance mileage requirement under the circulating working condition, the endurance mileage requirement of the whole automobile is guaranteed, the rese