公开(公告)号：EP3760469A1

公开(公告)日：2021-01-06

申请号：EP19774736.3

申请日：2019-03-25

Applicant: BYD Company Limited

Inventor： DENG, Linwang ,  YANG, Zihua ,  FENG, Tianyu ,  LV, Chun ,  LIN, Siqi

IPC: B60L3/00 ,  G01R31/3835

Abstract: The present disclosure discloses an electric vehicle and a method and an apparatus for calculating an endurance mileage of the electric vehicle. The calculation method includes the following steps: calculating energy consumption per unit mileage of a power battery of the electric vehicle; obtaining an open circuit voltage (OCV)-battery capacity Q reference curve of the power battery; obtaining an 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 mileage of the power battery and the current remaining available energy of the power battery. The endurance mileage of the electric vehicle calculated in this way is more accurate.

公开(公告)号：EP3767317A1

公开(公告)日：2021-01-20

申请号：EP19774341.2

申请日：2019-03-25

Applicant: BYD Company Limited

Inventor： DENG, Linwang ,  FENG, Tianyu ,  LV, Chun ,  LIN, Siqi ,  YANG, Zihua

IPC: G01R31/36

Abstract: This application discloses a method and an apparatus for calculating an SOH of a power battery pack, and an electric vehicle. The method includes the following steps: obtaining a charging curve of a cell of the power battery pack, and determining a current charging stage according to the charging curve, where the charging stage includes a high-voltage charging turning point and a high-voltage platform charging stage; obtaining a battery pack level corresponding to the high-voltage charging turning point and a battery pack level corresponding to the high-voltage platform charging stage; calculating a remaining capacity of the cell according to the battery pack level corresponding to the high-voltage charging turning point and the battery pack level corresponding to the high-voltage platform charging stage; and calculating an SOH of the cell according to the remaining capacity. According to the method of this application, convenience and accuracy of estimating the SOH of the power battery pack can be greatly improved.

公开(公告)号：EP3761475A1

公开(公告)日：2021-01-06

申请号：EP19777123.1

申请日：2019-03-25

Applicant: BYD Company Limited

Inventor： FENG, Tianyu ,  DENG, Linwang ,  LV, Chun ,  LIN, Siqi ,  YANG, Zihua

IPC: H02J7/00

Abstract: The present disclosure discloses a vehicle, and an equalization method and device for a power battery pack. The method includes the following steps: obtaining a high voltage turning point of a charging curve of a cell of the power battery pack, obtaining a capacity of the cell according to the high voltage turning point of the cell, and equalizing the cell according to the capacity of the cell. Therefore, equalization management of the power battery pack can be implemented, thereby improving utilization of the power battery pack and prolonging a service life of the power battery pack.