公开(公告)号：US20240142537A1

公开(公告)日：2024-05-02

申请号：US18384447

申请日：2023-10-27

Applicant: Webasto SE

Inventor： David Bennets ,  Samantha Zimnik

IPC: G01R31/396 ,  G01R31/367 ,  G01R31/3835

CPC classification number: G01R31/396 ,  G01R31/367 ,  G01R31/3835

Abstract: The present invention relates to a method for determining a proportion of defective battery cells in a group of battery cells connected electrically in parallel in a battery, where a voltage state of a terminal voltage of the group is determined in relation to a charging process and/or in relation to a relaxation of the battery under an environmental condition and a deviation of the determined voltage state of the terminal voltage from the voltage state of the terminal voltage of the same group from a previous charging process and/or a previous relaxation under the same environmental condition is calculated, where the proportion of defective battery cells in the group is determined from the calculated deviation.