US 12,322,773 B2
Secondary battery
Won Chull Han, Yongin-si (KR); Jeong Chull Ahn, Yongin-si (KR); Shin Gun Kang, Yongin-si (KR); Sang Hyun Kim, Yongin-si (KR); Sung Soo Park, Yongin-si (KR); Soo Youn Park, Yongin-si (KR); Chang Wook Kim, Yongin-si (KR); Young Jin Park, Yongin-si (KR); and Yu Jin Han, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Appl. No. 16/756,443
Filed by Samsung SDI Co., Ltd., Yongin-si (KR)
PCT Filed Sep. 20, 2018, PCT No. PCT/KR2018/011123
§ 371(c)(1), (2) Date Apr. 15, 2020,
PCT Pub. No. WO2019/098520, PCT Pub. Date May 23, 2019.
Claims priority of application No. 10-2017-0151752 (KR), filed on Nov. 14, 2017.
Prior Publication US 2020/0259222 A1, Aug. 13, 2020
Int. Cl. B32B 15/20 (2006.01); H01M 10/613 (2014.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/126 (2021.01); H01M 50/131 (2021.01); H01M 50/133 (2021.01)
CPC H01M 10/613 (2015.04) [B32B 15/20 (2013.01); H01M 50/119 (2021.01); H01M 50/121 (2021.01); H01M 50/126 (2021.01); H01M 50/131 (2021.01); H01M 50/133 (2021.01)] 4 Claims
OG exemplary drawing
 
1. A secondary battery comprising:
an electrode assembly; and
a sheath material which receives the electrode assembly and comprises a metal layer and a non-metal layer formed on a surface of the metal layer,
wherein the non-metal layer comprises polybutylene terephthalate (PBT), or polybutylene naphthalate (PBN),
wherein the non-metal layer comprises:
a first insulation layer located on one surface of the metal layer and defining an internal surface of the sheath material; and
a second insulation layer located on another surface of the metal layer facing away from the one surface of the metal layer, the other surface defining an external surface of the sheath material,
wherein the total thickness of the sheath material ranges from 80 μm to 88 μm,
wherein the metal layer comprises an aluminum alloy or consists of iron,
wherein the thickness of the metal layer occupies 50% to 70% of the total thickness of the sheath material,
wherein the thickness of the metal layer is 1.04 to 1.50 times that of the non-metal layer,
wherein the thickness of the first insulation layer occupies 20% to 30% of the total thickness of the sheath material and the thickness of the second insulation layer occupies 13% to 20% of the total thickness of the sheath material, and
wherein the thermal conductivity of the sheath material ranges from 120 to 150 W/mk.