US 11,658,355 B2
Method and system for analyzing swelling behavior of lithium secondary battery
Byung Joon Chae, Daejeon (KR); Yongjun Kim, Daejeon (KR); Jonggeol Kim, Daejeon (KR); and Jong Seok Jeong, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Jan. 26, 2021, as Appl. No. 17/158,528.
Claims priority of application No. 10-2020-0010333 (KR), filed on Jan. 29, 2020; and application No. 10-2020-0169322 (KR), filed on Dec. 7, 2020.
Prior Publication US 2021/0234207 A1, Jul. 29, 2021
Int. Cl. H01M 10/48 (2006.01); G01N 23/04 (2018.01); H01M 10/44 (2006.01)
CPC H01M 10/48 (2013.01) [G01N 23/04 (2013.01); H01M 10/44 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for analyzing a swelling behavior of a lithium secondary battery, comprising:
(S1) installing a detachable pressurizing holder for fixing a battery sample and a charge/discharge cable connected with an external charging/discharging device to an X-ray computed tomography (CT) imaging equipment;
(S2) inserting the battery sample into the detachable pressurizing holder, contacting an electrode lead of the battery sample with a terminal of the charge/discharge cable, and then operating the external charging/discharging device to perform charging and discharging; and
(S3) during the performing of charging and discharging of the battery sample, irradiating and scanning X-ray on the battery sample at an angle ranging from −10° to 10° while rotating the battery sample to obtain a 3D image, and then measuring a change in the thickness of the electrode inside the battery sample from the 3D image,
wherein the detachable pressurizing holder includes a pair of plate-shaped members parallel to the surface of the cell sample and a pair of pressurizing sponges interposed between the pair of plate-shaped members, and the battery sample is inserted between the pressurizing sponges.