Patent ID: 11904703
Assignee: BYD COMPANY LIMITED
Field: Transport (Mechanical engineering)
Classification: CPC B  G  Y | IPC B  G

Claim 6:
7. An apparatus for calculating an endurance mileage of an electric vehicle, the apparatus comprising a processor and a non-transitory computer-readable storage medium storing instructions executable by the processor to cause the apparatus to perform operations comprising:
calculating energy consumption per unit distance of a power battery of the electric vehicle by using a first formula:

DK=αDstd+βDactual+γDK-1,

 wherein Dstd is energy consumption per unit distance under a standard operating condition, Dactual is energy consumption per unit distance under an actual operating condition, DK-1 is energy consumption per unit distance at a previous moment, K is an integer, and α, β, and γ are coefficients;
selecting α, β, and v based on a current actual operating condition to improve accuracy of predicting an energy consumption per unit distance under a future operating condition of the electric vehicle;
obtaining an open circuit voltage-battery capacity (OCV-Q) reference curve of the power battery;
measuring an open circuit voltage (OCV) of the power battery;
obtaining current remaining available energy of the power battery according to the OCV and the OCV-Q reference curve of the power battery; and, calculating the endurance mileage of the electric vehicle according to the energy consumption per unit distance of the power battery and the current remaining available energy of the power battery.