公开(公告)号：US20240322268A1

公开(公告)日：2024-09-26

申请号：US18577830

申请日：2022-06-10

Applicant: GS Yuasa International Ltd.

Inventor： Masahiro TATSUMI ,  Atsushi FUKUSHIMA ,  Takashi YAMASHITA ,  Yuki IMANAKA

IPC: H01M10/42 ,  H01M50/55 ,  H01M50/569 ,  H01M50/574

CPC classification number: H01M10/4257 ,  H01M50/55 ,  H01M50/569 ,  H01M50/574 ,  H01M2010/4271

Abstract: An energy storage apparatus 50 includes: a cell 62; positive and negative external terminals 51, 52; a current interruption device 53 disposed on a first line 55P that connects the cell and one of the external terminals; a resistor 54 for current measurement that is disposed on a second line 55N that connects the cell and the other of the external terminals; a discharge circuit 120 connected to the cell 62 and the current interruption device 53 in parallel; and a control device 130. The discharge circuit 120 includes a discharge resistor 121 and a discharge switch 123. The control device 130, in a state where the current interruption device 53 is controlled to take an open state, measures currents I1, I2 by the resistor 54 with respect to a state where the discharge switch 123 is in a closed position and a state where the discharge switch 123 is in an open position, and diagnoses a failure in the current interruption device 53 based on a difference ΔI between a current value I2 measured when the discharge switch 123 is in the closed position and a current value I1 measured when the discharge switch 123 is in the open position.