US 12,237,514 B2
Current collector of secondary battery and secondary battery
Daisuke Horikawa, Kariya (JP); and Yohei Shindo, Toyota (JP)
Assigned to PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed by PRIME PLANET ENERGY & SOLUTIONS, INC., Tokyo (JP)
Filed on May 5, 2022, as Appl. No. 17/662,134.
Claims priority of application No. 2021-82564 (JP), filed on May 14, 2021.
Prior Publication US 2022/0367879 A1, Nov. 17, 2022
Int. Cl. H01M 10/0525 (2010.01); H01M 4/66 (2006.01)
CPC H01M 4/668 (2013.01) [H01M 10/0525 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A current collector used for an electrode of a secondary battery, comprising:
a laminate structure in which a resin layer and a metal layer formed on both surfaces of the resin layer are laminated, wherein
a surface of the metal layer comprises a rough surface part that is provided with a plurality of protruding parts and a plurality of recessed parts,
on the rough surface part, a resin coat layer is formed, and
among the plurality of protruding parts, at least one part of the protruding parts comprises an exposed part that is exposed from the resin coat layer.