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:
Jul. 20, 2021
Filed:
Dec. 11, 2018
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A method for manufacturing a fuel cell separator that ensures an improved corrosion resistance under usage environment of a fuel cell and restraining an increase of a contact resistance with a power generation unit by enhancing a sticking force of a conductive carbon film formed on a surface in contact with the power generation unit on a surface of a titanium substrate is provided. It is a method for manufacturing a fuel cell separator. The fuel cell separator includes a contact portion that is in contact with a power generation unit so as to partition the power generation units including electrodes of the fuel cell, and includes a conductive carbon film formed on the contact portion. First, a titanium substrate that has a plurality of projecting portions formed corresponding to a shape of the contact portion and recessed portions for gas flow channels formed between the projecting portions are prepared as a substrate of the separator. Next, a heat treatment is performed on the titanium substrate in a state where a carbon sheet is brought in contact with the projecting portions such that carbon of the carbon sheet diffuses in the projecting portions.