公开(公告)号：US20230238822A1

公开(公告)日：2023-07-27

申请号：US18192963

申请日：2023-03-30

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Ting GUAN ,  Shan ZHU ,  Zhiru YANG ,  Fei WU

IPC: H02J7/00

CPC classification number: H02J7/007182 ,  H02J7/0013

Abstract: A charging method for battery. In an n-th charging process, charging a first battery to a charge cut-off voltage Un in a first charging manner, where n is a positive integer; after the n-th charging process is completed, leaving the first battery standing, and obtaining an open-circuit voltage OCVn of the first battery at a standing time of ti; in an m-th charging process, charging the first battery to the charge cut-off voltage Un in the first charging manner, where m is a positive integer, and m>n; after the m-th charging process is completed, leaving the first battery standing, and obtaining an open-circuit voltage OCVm of the first battery at the standing time of ti; and under the condition of OCVn>OCVm, continuing to charge the first battery standing in a second charging manner to a first voltage U′m, where U′m=Un+k×(OCVn−OCVm), and 0