US 12,347,876 B2
Electricity storage device cladding
Junya Imamoto, Tokyo (JP); Yu Ogihara, Tokyo (JP); and Masayoshi Suzuta, Tokyo (JP)
Assigned to TOPPAN PRINTING CO., LTD., Tokyo (JP)
Appl. No. 17/056,363
Filed by TOPPAN PRINTING CO., LTD., Tokyo (JP)
PCT Filed Feb. 5, 2019, PCT No. PCT/JP2019/004089
§ 371(c)(1), (2) Date Nov. 17, 2020,
PCT Pub. No. WO2019/225065, PCT Pub. Date Nov. 28, 2019.
Claims priority of application No. 2018-097705 (JP), filed on May 22, 2018.
Prior Publication US 2021/0226283 A1, Jul. 22, 2021
Int. Cl. H01M 50/126 (2021.01); B32B 7/12 (2006.01); B32B 15/085 (2006.01); B32B 15/20 (2006.01); C23C 22/07 (2006.01); H01G 11/78 (2013.01); H01M 50/10 (2021.01); H01M 50/145 (2021.01)
CPC H01M 50/126 (2021.01) [B32B 7/12 (2013.01); B32B 15/085 (2013.01); B32B 15/20 (2013.01); C23C 22/07 (2013.01); H01G 11/78 (2013.01); H01M 50/10 (2021.01); H01M 50/145 (2021.01)] 9 Claims
OG exemplary drawing
 
1. A packaging material for a power storage device, comprising:
a substrate layer;
a metallic foil layer with an anti-corrosion treatment layer on one face or both faces thereof; and
a sealant layer,
in this order, wherein
the sealant layer includes a resin layer containing a polypropylene-based resin (A) and an incompatible component (B) incompatible with the polypropylene-based resin (A),
the sealant layer has a value (I) of loss tangent tan δ at −50° C. and a maximal value (II) of loss tangent tan δ at −30° C. to 30° C. determined by dynamic viscoelasticity measurement at a frequency of 1.0 Hz, and a ratio (II/I) of the maximal value (II) to the value (I) is 2.50 or more.