The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 2023
Filed:
May. 13, 2019
Applicant:
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Inventor:
Masaki Hirano, Tsushima, JP;
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 25/00 (2006.01); H01M 8/0223 (2016.01); B21D 22/20 (2006.01); H01M 8/0206 (2016.01); H01M 50/403 (2021.01);
U.S. Cl.
CPC ...
H01M 8/0223 (2013.01); B21D 22/20 (2013.01); B21D 25/00 (2013.01); H01M 8/0206 (2013.01); H01M 50/403 (2021.01);
Abstract
Provided is a method for producing a fuel cell separator, capable of easily roughening the surface of a sheet-like metal substrate to become a fuel cell separator and thus reducing the contact resistance of the resulting fuel cell separator. Specifically, the method is a method for producing a fuel cell separator from a sheet-like metal substrate, including pulling the metal substrate at least in one direction to plastically deform the metal substrate, thereby increasing the arithmetic average roughness Ra of the surface of the metal substrate after being pulled compared to that before being pulled.