公开(公告)号：US20200243920A1

公开(公告)日：2020-07-30

申请号：US16652551

申请日：2019-03-26

申请人： LG Chem, Ltd.

发明人： Dong-Sik Yoon ,  Jin-Kyu Lee

IPC分类号： H01M10/42 ,  G01R31/3835 ,  G01R31/36

摘要： An apparatus and method for testing a secondary battery. The apparatus includes a test path, test terminals provided at two ends of the test path and electrically connected to a positive terminal and a negative terminal of the secondary battery respectively, a sensor unit provided on the test path and configured to measure a discharge current of the secondary battery, a constant voltage generation unit provided on the test path and configured to maintain a constant voltage between the secondary battery and the sensor unit, and a control unit configured to receive data indicating the discharge current from the sensor unit, measure an inflection point on a profile of the discharge current, measure an intensity of the discharge current on the basis of the inflection point, and test a level of self-discharge of the secondary battery based on the intensity of the discharge current.

公开(公告)号：US11594766B2

公开(公告)日：2023-02-28

申请号：US16652551

申请日：2019-03-26

申请人： LG Chem, Ltd.

发明人： Dong-Sik Yoon ,  Jin-Kyu Lee

IPC分类号： H01M10/42 ,  G01R31/3835 ,  G01R31/36

摘要： An apparatus and method for testing a secondary battery. The apparatus includes a test path, test terminals provided at two ends of the test path and electrically connected to a positive terminal and a negative terminal of the secondary battery respectively, a sensor unit provided on the test path and configured to measure a discharge current of the secondary battery, a constant voltage generation unit provided on the test path and configured to maintain a constant voltage between the secondary battery and the sensor unit, and a control unit configured to receive data indicating the discharge current from the sensor unit, measure an inflection point on a profile of the discharge current, measure an intensity of the discharge current on the basis of the inflection point, and test a level of self-discharge of the secondary battery based on the intensity of the discharge current.

公开(公告)号：US11500027B2

公开(公告)日：2022-11-15

申请号：US16960579

申请日：2019-06-11

申请人： LG CHEM, LTD.

发明人： Soo-Han Kim ,  Dong-Sik Yoon

IPC分类号： G01R31/3835 ,  G01R31/364 ,  G01R31/36 ,  H01M10/42 ,  H01M10/48 ,  G01R31/52

摘要： Disclosed is a method and apparatus for testing an internal short of a secondary battery by simulating the use environment situation where the secondary battery is actually used, and a secondary battery for an internal short test, which is used in the method. The method for testing an internal short of a secondary battery includes the steps of mounting a P-N junction diode in a secondary battery; charging the secondary battery; and evaluating a state of the secondary battery by considering that an internal short occurs in the secondary battery when the P-N junction diode is switched on.