US 11,658,317 B2
Method of inspection for erroneous assembly of fuel cell stacks
Takashi Kato, Tochigi (JP); Toru Ikeda, Tochigi (JP); Naohiro Kawakita, Tochigi (JP); and Keiichi Iio, Tochigi (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Feb. 25, 2021, as Appl. No. 17/184,612.
Claims priority of application No. JP2020-029992 (JP), filed on Feb. 26, 2020.
Prior Publication US 2021/0265647 A1, Aug. 26, 2021
Int. Cl. H01M 8/04664 (2016.01); H01M 8/0438 (2016.01); H01M 8/241 (2016.01); H01M 8/04537 (2016.01)
CPC H01M 8/04679 (2013.01) [H01M 8/04388 (2013.01); H01M 8/04395 (2013.01); H01M 8/04432 (2013.01); H01M 8/04559 (2013.01); H01M 8/241 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of inspection for erroneous assembly of a fuel cell stack produced by stacking, in predetermined proper power generation positions and proper dummy positions, a power generation cell produced by assembling a power generation MEA and a power generation separator having passages for supplying gas to an anode and a cathode of the power generation MEA, and a dummy cell produced by assembling a dummy MEA having different functions than the power generation MEA and a dummy separator having different functions than the power generation separator, the method comprising the steps of:
measuring at least one of a pressure in anode gas passages and cathode gas passages of a workpiece which is a laminated body of a plurality of cells when gas is supplied to an anode gas inlet and a cathode gas inlet of the workpiece, a cell voltage of each cell when gas is supplied to the anode gas inlet and the cathode gas inlet, and a cell voltage of each cell when gas is supplied to the anode gas inlet and the cathode gas inlet and an external voltage is applied to electrodes of the workpiece; and
based on a result of the measurement, determining whether or not the workpiece is in any of a first erroneous assembly state in which the power generation cell is laminated in the proper dummy position, a second erroneous assembly state in which the dummy cell is laminated in the proper power generation position, a third erroneous assembly state including a first abnormal cell in which the dummy MEA and the power generation separator are assembled, arid a fourth erroneous assembly state including a second abnormal cell in which the power generation MEA and the dummy separator are assembled.