US 11,658,312 B2
Manufacturing method for fuel cell
Atsuhiro Miura, Nisshin (JP); Kenji Sato, Kasugai (JP); Takuya Kurihara, Miyoshi (JP); Takayuki Furuhata, Nagakute (JP); Atsushi Fukunishi, Toyota (JP); Tomohiro Hangai, Miyoshi (JP); and Hiroomi Kobayashi, Kazaki (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Apr. 29, 2021, as Appl. No. 17/243,767.
Claims priority of application No. JP2020-091635 (JP), filed on May 26, 2020.
Prior Publication US 2021/0376337 A1, Dec. 2, 2021
Int. Cl. H01M 8/0232 (2016.01); B23K 26/20 (2014.01); H01M 8/0258 (2016.01); H01M 8/0234 (2016.01)
CPC H01M 8/0232 (2013.01) [B23K 26/20 (2013.01); H01M 8/0234 (2013.01); H01M 8/0258 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A manufacturing method for manufacturing a fuel cell, the manufacturing method comprising:
a laser application step of applying a laser beam 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; and
a bonding step of bonding the separator to a resin member within a range including at least part of a range where the metal plate is exposed wherein:
the resin member is a resin frame having a through-hole;
the manufacturing method further includes a step of placing a membrane electrode assembly in the through-hole; and
in the bonding step, the separator is bonded to the resin frame such that the through-hole is closed by the separator; and
wherein:
when the separator is bonded to the resin frame, a gas passage is formed on an interface between the separator and the resin frame; and
the laser application step and the bonding step are executed to satisfy the following conditions:
a condition in which the application range of the laser beam is placed to be distanced from the gas passage and to extend along the gas passage;
a condition in which a bonding range in which the separator is bonded to the resin frame is placed to be distanced from the gas passage and to extend along the gas passage; and
a condition in which a central axis of the application range is placed at a position closer to the gas passage than a central axis of the bonding range.