Title:
POWER STORAGE DEVICE AND METHOD FOR DIAGNOSING FAILURE OF CURRENT INTERRUPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/286503
Kind Code:
A1
Abstract:
A power storage device 50 comprises: 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 external terminal; a discharge circuit 120 that is connected to the cell 62 and the current interruption device 53 in parallel; and a control device 130. The discharge circuit 120 comprises a discharge resistor 121 and a discharge switch 123. In a state in which the current interruption device 53 is being controlled to be open, the control device 130: measures, using the resistor 54, currents I1, I2 for a state in which the discharge switch 123 is being controlled to be closed and a state in which same is being controlled to be open; and diagnoses failure of the current interruption device 53 on the basis of a difference ΔI between the current value I2 measured with the discharge switch 123 being controlled to be closed, and the current value I1 measured with the discharge switch 123 being controlled to be open.
Inventors:
TATSUMI MASAHIRO (JP)
FUKUSHIMA ATSUSHI (JP)
YAMASHITA TAKASHI (JP)
IMANAKA YUKI (JP)
FUKUSHIMA ATSUSHI (JP)
YAMASHITA TAKASHI (JP)
IMANAKA YUKI (JP)
Application Number:
PCT/JP2022/023401
Publication Date:
January 19, 2023
Filing Date:
June 10, 2022
Export Citation:
Assignee:
GS YUASA INT LTD (JP)
International Classes:
H02H7/00; H01M10/44; H01M10/48; H02J7/00
Foreign References:
| JP2018536855A | 2018-12-13 | |||
| JP2019100878A | 2019-06-24 | |||
| JP2012100438A | 2012-05-24 |
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