US 12,292,418 B2
Fatigue testing apparatus for metallic foil and method using same
Ki Tae Kim, Daejeon (KR); Hyung Kyun Yu, Daejeon (KR); Ki Hoon Paeng, Daejeon (KR); and Sang Myeon Lee, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/775,625
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jan. 20, 2021, PCT No. PCT/KR2021/095024
§ 371(c)(1), (2) Date May 10, 2022,
PCT Pub. No. WO2021/261980, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 10-2020-0076337 (KR), filed on Jun. 23, 2020.
Prior Publication US 2022/0397502 A1, Dec. 15, 2022
Int. Cl. G01N 3/34 (2006.01)
CPC G01N 3/34 (2013.01) [G01N 2203/0017 (2013.01); G01N 2203/0037 (2013.01); G01N 2203/0073 (2013.01); G01N 2203/0202 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An apparatus for testing a fatigue of a metal foil, comprising:
a metal foil moving unit including an unwinding roll, from which a metal foil is unwound, a plurality of guide rolls configured to support and transfer the metal foil supplied from the unwinding roll, and a rewinding roll where the metal foil transferred from the guide rolls is wound;
a tensile strength measuring unit configured to measure tensile strength of the metal foil before and after movement of the metal foil repeatedly moved by the metal foil moving unit; and
a disconnection detection unit to detect whether the metal foil is disconnected by checking a crack generated on the metal foil.