公开(公告)号：US20200067145A1

公开(公告)日：2020-02-27

申请号：US16604193

申请日：2018-11-20

Applicant: TDK CORPORATION

Inventor： Masayuki YAMASHIMA ,  Mikio TSURUOKA ,  Hiroki KITAMURA

IPC: H01M10/42 ,  H01M10/0569 ,  H01M10/0568 ,  H01M10/46 ,  H01M10/44 ,  H02J7/00

Abstract: A battery pack which includes: a battery cell which contains a non-aqueous electrolyte, wherein the battery cell is a non-aqueous electrolyte secondary battery; a casing which stores the battery cell; and at least one liquid leakage sensor which detects liquid leakage from the battery cell, wherein the casing and/or the battery cell have a leaked liquid retention region in which the non-aqueous electrolyte tends to be retained when the non-aqueous electrolyte leaks out of the battery cell, wherein the liquid leakage sensor outputs measurement information as a detection result without using a charging/discharging circuit which charges and discharges the battery cell, and wherein at least one sensor unit of the liquid leakage sensor is provided in the leaked liquid retention region.