公开(公告)号：EP4404327A1

公开(公告)日：2024-07-24

申请号：EP22913988.6

申请日：2022-11-30

Applicant: BYD Company Limited

Inventor： DENG, Linwang ,  LI, Xiaoqian ,  FENG, Tianyu ,  HONG, Jingjing

IPC: H01M10/44

CPC classification number: B60L58/10 ,  H01M10/44 ,  H01M10/42

Abstract: Provided is a battery management method, including: obtaining a current high-voltage inflection point power value of each cell; obtaining a current historical cumulative balance power value of each cell (S 102); obtaining a current equivalent self-discharge value of each cell through calculation (S103); obtaining an equivalent self-discharge value at a previous moment of each cell (S 104); obtaining a target equivalent self-discharge value of each cell through calculation (S 105); determining a maximum target equivalent self-discharge value and a minimum target equivalent self-discharge value (S 106); obtaining a maximum equivalent self-discharge rate and a minimum equivalent self-discharge rate through calculation (S 107); and when a difference between the maximum equivalent self-discharge rate and the minimum equivalent self-discharge rate is greater than a preset threshold, managing a target cell corresponding to the maximum target equivalent self-discharge value (S108). The present invention further provides a battery management apparatus, a vehicle, and a computer-readable storage medium.

公开(公告)号：EP4446759A1

公开(公告)日：2024-10-16

申请号：EP22934699.4

申请日：2022-09-14

Applicant: BYD Company Limited

Inventor： LI, Xiaoqian ,  FENG, Tianyu ,  DENG, Linwang ,  HONG, Jingjing

IPC: G01R31/3835

Abstract: A method and device for battery capacity determination, and a non-transitory computer-readable storage medium are provided. The method for battery capacity determination includes: acquiring a first inflection voltage, a corresponding first inflection electric quantity, a second inflection voltage and a corresponding second inflection electric quantity of a battery; controlling the battery to be charged and recording a first charging profile of the battery in real time; determining at least one target inflection point according to the first charging profile; detecting the electric quantity of the battery until the charging is completed, acquiring a first charged electric quantity and a second charged electric quantity; when the at least one target inflection point determined includes the first inflection point, calculating a current capacity of the battery according to the first inflection electric quantity, the first charged electric quantity and the second charged electric quantity.