US 12,119,440 B2
Pressure sensitive adhesive sheet for batteries and lithium-ion battery
Takeshi Ansai, Tokyo (JP); Yuichi Kurata, Tokyo (JP); Hajime Nishino, Nara (JP); Tomoki Shiozaki, Osaka (JP); and Kazuhiro Yoshii, Osaka (JP)
Assigned to LINTEC CORPORATION, Tokyo (JP); and PANASONIC HOLDINGS CORPORATION, Osaka (JP)
Filed by LINTEC CORPORATION, Tokyo (JP); and Panasonic Corporation, Osaka (JP)
Filed on Dec. 22, 2020, as Appl. No. 17/130,694.
Claims priority of application No. 2019-235493 (JP), filed on Dec. 26, 2019.
Prior Publication US 2021/0198529 A1, Jul. 1, 2021
Int. Cl. H01M 10/0525 (2010.01); C08K 3/30 (2006.01); C08K 5/00 (2006.01); C09J 7/20 (2018.01); C09J 7/38 (2018.01); C09J 133/08 (2006.01); H01M 50/195 (2021.01); H01M 50/198 (2021.01)
CPC H01M 10/0525 (2013.01) [C08K 5/0025 (2013.01); C08K 5/005 (2013.01); C09J 7/20 (2018.01); C09J 7/38 (2018.01); C09J 133/08 (2013.01); H01M 50/195 (2021.01); H01M 50/198 (2021.01); C08K 2003/3045 (2013.01); C08K 2201/003 (2013.01); C08K 2201/005 (2013.01); C09J 7/201 (2018.01); C09J 2203/33 (2013.01); C09J 2301/302 (2020.08); C09J 2301/408 (2020.08); C09J 2433/00 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A lithium-ion battery, comprising:
two or more conductors fixed in a state of being in contact with each other inside the battery using a pressure sensitive adhesive sheet that comprises:
a base material; and
a pressure sensitive adhesive layer provided on one surface side of the base material,
the pressure sensitive adhesive layer containing inorganic fine particles having a water content of 0.4% or less in a single body, the inorganic fine particles being sulfate fine particles,
the pressure sensitive adhesive layer being formed of a pressure sensitive adhesive composition that consists of:
a (meth)acrylic ester polymer (A) that is a polymer obtained by solution polymerization, the (meth)acrylic ester polymer (A) having a weight-average molecular weight of 500,000 or more and 2,500,000 or less,
a crosslinker (B),
the inorganic fine particles, and
at least one additive selected from a tackifier, an antioxidant, a softening agent, and a filler.