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

Claim 12:
13. An electric vehicle, comprising:
a power battery; and
an apparatus for calculating an endurance mileage of the 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 the 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.