US 12,230,831 B2
Stretching apparatus for manufacturing separator and method of manufacturing separator using the same
Kyoung Sun Ryu, Cheongju-si (KR); Won Keun Choi, Cheongju-si (KR); Kwang Ho Choi, Cheongju-si (KR); Pyung Yong Park, Cheongju-si (KR); and Byung Hyun Kim, Cheongju-si (KR)
Assigned to W-SCOPE KOREA CO., LTD., Cheongju-si (KR); and W-SCOPE CHUNGJU PLANT CO., LTD., Cheongju-si (KR)
Filed by W-SCOPE KOREA CO., LTD., Cheongju-si (KR); and W-SCOPE CHUNGJU PLANT CO., LTD., Chungju-si (KR)
Filed on Jul. 1, 2022, as Appl. No. 17/856,437.
Claims priority of application No. 10-2021-0191331 (KR), filed on Dec. 29, 2021.
Prior Publication US 2023/0207961 A1, Jun. 29, 2023
Int. Cl. H01M 50/406 (2021.01); H01M 50/417 (2021.01); H01M 50/449 (2021.01)
CPC H01M 50/406 (2021.01) [H01M 50/417 (2021.01); H01M 50/449 (2021.01)] 11 Claims
OG exemplary drawing
 
1. A stretching apparatus for manufacturing a separator, comprising:
a first stretching machine and a second stretching machine arranged in parallel with each other,
wherein the first stretching machine includes a plurality of first unit sections having different stretching ratios,
the second stretching machine includes a plurality of second unit sections having different stretching ratios,
an overall stretching ratio of the first stretching machine and an overall stretching ratio of the second stretching machine are the same,
at least one stretching ratio of a first unit section and at least one stretching ratio of a second unit section are different from each other, and
a rate of change of the stretching ratio between two first unit sections in the first stretching machine and a rate of change of the stretching ratio between two second unit sections in the second stretching machine are different from each other.