Manufacturing method for fuel cell
A technology for a fuel cell unit and a manufacturing method, which is applied in the directions of fuel cells, fuel cell parts, manufacturing tools, etc., can solve the problem of difficult adhesion between separators and resin parts, easy peeling of separators and resin parts, and difficult high adhesion. Problems such as adhesion of force spacers to resin parts
Active Publication Date: 2021-11-30
TOYOTA JIDOSHA KK
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Problems solved by technology
However, the spacer (i.e., metal plate) has gloss, so the laser light is easily reflected on the surface of the spacer, so that the laser light is difficult to be absorbed by the spacer
Therefore, it is difficult to sufficiently remove stains on the surface of the spacer
Therefore, it is difficult to bond the spacer to the resin part with a high adhesive force
[0005]
As described above, in the conventional fuel cell unit, it is difficult to bond the separator and the resin member with high strength.
Therefore, there is a problem that the bonded portion between the separator and the resin member is easily peeled off due to the pressure (pressure of various gases, pressure of refrigerant) generated in the fuel cell.
Method used
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Embodiment 3
[0065] In the manufacturing method of embodiment 3, the laser energy density is controlled at 100mJ / mm in the laser irradiation process 2 the following. In addition, in the spacer bonding step, an adhesion curing agent or an adhesion promoter is applied to the surface of the metal plate.
[0066] In the laser irradiation process of embodiment 3, the laser energy density is controlled at 100mJ / mm 2 the following. If the laser energy density is controlled in this way, then as Figure 17 As shown, a porous structure 41p made of TiOx (titanium oxide) is formed on the surface of the metal plate 41 in the range 40s irradiated with laser light. Similarly, a porous structure is also formed on the surface of the metal plate within the range of 50s and 40t. Here, a porous structure having a thickness of about 10 nm to 1000 nm is formed.
[0067] In the spacer bonding process of Embodiment 3, the surfaces of the metal plates 41 and 51 within the range of 40s and 50s are coated with ...
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Abstract
Disclosed is a manufacturing method for manufacturing a fuel cell that includes a laser application step and a bonding step. In the laser application step, a laser beam is applied to a carbon film of a separator including a metal plate and the carbon film covering a surface of the metal plate such that the metal plate is exposed by removing the carbon film within an application range of the laser beam. In the bonding step, the separator is bonded to a resin member within a range including at least part of a range where the metal plate is exposed.
Description
technical field [0001] The technology disclosed in this specification relates to a method of manufacturing a fuel cell. Background technique [0002] The fuel cell unit disclosed in Japanese Patent Laid-Open No. 2018-129213 has a configuration in which a resin frame (also referred to as a resin sheet) is clamped and fixed between a pair of separators. Each spacer is bonded to the resin frame. The resin frame has a through hole, and a pair of spacers cover the through hole. A membrane / electrode assembly is arranged in the through hole. In addition, a gasket is bonded to the back surface (the surface on the opposite side to the surface bonded to the resin frame) of one spacer. [0003] In the fuel cell unit of Japanese Patent Laid-Open No. 2018-129213, the surface of the separator is covered with a carbon film. That is, the spacer is composed of a metal plate and a carbon film covering the surface. Therefore, the carbon film is bonded to the resin parts such as the resin ...
Claims
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IPC IPC(8): B08B7/00H01M8/0202H01M8/0273H01M8/0276H01M8/0286
CPCB08B7/0042H01M8/0202H01M8/0273H01M8/0286H01M8/0276H01M8/0206H01M8/0213H01M8/0228H01M8/1004H01M2008/1095H01M8/0297H01M8/2483Y02E60/50Y02P70/50H01M8/0232B23K26/20H01M8/0258H01M8/0234
Inventor 三浦淳弘佐藤研二栗原卓也古畑贵之福西笃志半谷智弘小林裕臣
Owner TOYOTA JIDOSHA KK