US 12,257,747 B2
Secondary battery comprising injection-molded battery case
Soo Ji Hwang, Daejeon (KR); Yong Su Choi, Daejeon (KR); Sang Hun Kim, Daejeon (KR); Hyung Kyun Yu, Daejeon (KR); Na Yoon Kim, Daejeon (KR); Min Hyeong Kang, Daejeon (KR); and Yong Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 16/604,359
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Jul. 5, 2018, PCT No. PCT/KR2018/007615
§ 371(c)(1), (2) Date Oct. 10, 2019,
PCT Pub. No. WO2019/088398, PCT Pub. Date May 9, 2019.
Claims priority of application No. 10-2017-0143675 (KR), filed on Oct. 31, 2017.
Prior Publication US 2020/0168855 A1, May 28, 2020
Int. Cl. H01M 50/121 (2021.01); B29C 45/00 (2006.01); B29C 45/14 (2006.01); B29K 101/10 (2006.01); H01M 50/131 (2021.01); H01M 50/166 (2021.01); B29K 101/12 (2006.01); B29L 31/34 (2006.01); H01M 50/103 (2021.01); H01M 50/105 (2021.01); H01M 50/119 (2021.01); H01M 50/124 (2021.01)
CPC B29C 45/14 (2013.01) [B29C 45/0001 (2013.01); H01M 50/121 (2021.01); H01M 50/131 (2021.01); H01M 50/166 (2021.01); B29K 2101/12 (2013.01); B29K 2995/0092 (2013.01); B29L 2031/3468 (2013.01); H01M 50/103 (2021.01); H01M 50/105 (2021.01); H01M 50/119 (2021.01); H01M 50/124 (2021.01)] 8 Claims
OG exemplary drawing
 
1. A secondary battery in which an electrode assembly is received in a battery case together with an electrolytic material,
wherein an aluminum tape is attached to at least a portion of a surface of the electrode assembly,
wherein the battery case is provided therein with a space for receiving the electrode assembly and the electrolytic material,
wherein the electrode assembly and the electrolytic material are disposed within the battery case such that the electrolytic material contacts the battery case,
wherein the battery case is made of a thermoplastic resin and does not include metal,
wherein the thermoplastic resin comprises a hygroscopic additive, and
wherein the battery case is injection molded such that the battery case has no seam on an outer surface thereof with the thermoplastic resin surrounding the entire outer surface of the electrode assembly and the electrode assembly completely enclosed by the battery case, such that only electrode terminals protruding from the electrode assembly extend outwards from the battery case.