METHOD FOR DETECTING INTERNAL SHORT-CIRCUITED CELL

Title:

METHOD FOR DETECTING INTERNAL SHORT-CIRCUITED CELL

Document Type and Number:

WIPO Patent Application WO/2020/262787

Kind Code:

A1

Abstract:

A method for detecting an internal short-circuited cell according to various embodiments comprises the steps of: periodically generating voltage values and current values of respective multiple battery cells which are electrically connected to each other between a first and a second terminal and being used; updating, in real time, a G parameter value and an H parameter value obtained by digitizing respective G parameter and H parameter which indicate current states of the respective battery cells, from the voltage values and the current values of the respective battery cells by using an adaptive filter; calculating a G parameter representative value and an H parameter representative value which represent the G parameter value and the H parameter value of the battery cells, respectively; and determining whether an internal short circuit has occurred in each of the battery cells, on the basis of the G parameter value, the H parameter value, the G parameter representative value, and the H parameter representative value of each of the battery cells. The G parameter is a parameter indicating a sensitivity of voltage for a change in current of the battery cell, and the H parameter is a parameter indicating an effective potential determined by a resistance distribution and a distribution of a local equilibrium potential within the battery cell.

Inventors:

KIM JAKE (KR)
HWANG YONG JUN (KR)
KIM GI HEON (KR)
RAYAPPAN CHRISTOBER (KR)
PAEK SUNG WOOK (KR)
LIM BYEONG HUI (KR)

Application Number:

PCT/KR2020/001647

Publication Date:

December 30, 2020

Filing Date:

February 05, 2020

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SAMSUNG SDI CO LTD (KR)

International Classes:

G01R31/396; G01R31/36; G01R31/382; G01R31/389

Foreign References:

JP2003153436A	2003-05-23
KR20180095703A	2018-08-27
US20110199054A1	2011-08-18
KR20140106436A	2014-09-03
KR20170022758A	2017-03-02

Other References: