公开(公告)号：US20240019496A1

公开(公告)日：2024-01-18

申请号：US18373821

申请日：2023-09-27

Applicant: BYD COMPANY LIMITED

Inventor： Linwang DENG ,  Tianyu FENG ,  Pengqing ZHANG ,  Xiaoqian LI

IPC: G01R31/367 ,  G01R31/392 ,  G01R31/387 ,  G01R31/374

CPC classification number: G01R31/367 ,  G01R31/392 ,  G01R31/387 ,  G01R31/374

Abstract: A method for obtaining a capacity of a power battery includes: collecting, by sensors, sample data of the power battery; dividing, by a processor, the sample data into multiple categories, each of the categories having a corresponding aging model and a feature identifier, the feature identifier identifying features of sample data of a corresponding category, and the aging model being obtained by: determining a fitting relationship in the aging model, and determining parameters in the fitting relationship according to sample data of a corresponding type of the aging model; acquiring, by the processor, battery state parameters of the power battery; selecting, by the processor, an aging model from multiple aging models according to the battery state parameters; and inputting, by the processor, the battery state parameters into the selected aging model to obtain the capacity of the power battery.