Electricity-generating assembly fabrication apparatus and method

Patent metadata

Field	Value
Publication number	US-2024181518-A1
Application number	US-202318195732-A
Country	US
Kind code	A1
Filing date	May 10, 2023
Priority date	Dec 5, 2022
Publication date	Jun 6, 2024
Grant date	—

Abstract

An electricity-generating assembly (EGA) fabrication apparatus includes a downstream press. The downstream press includes an attachment roll configured to attach a second gas diffusion layer (GDL) to a second surface of a membrane-electrode assembly (MEA) with a first GDL attached to a first surface of the MWA. The attachment roll is rotatable and is configured to receive the second GDL having a predetermined size and attach the GDL to the second surface of the MEA at predetermined distances.

First claim

1 . An electricity-generating assembly (EGA) fabrication apparatus comprising:
a downstream press, wherein the downstream press comprises an attachment roll configured to attach a second gas diffusion layer (GDL) to a second surface of a membrane-electrode assembly (MEA) with a first GDL attached to a first surface of the MWA; wherein the attachment roll is rotatable and configured to receive the second GDL having a predetermined size, and to attach the GDL to the second surface of the MEA at predetermined distances.

2 . The EGA fabrication apparatus according to claim 1 , further comprising a punch roll disposed adjacent to the attachment roll such that the second GDL continuously supplied to the attachment roll is located between the punch roll and the attachment roll,
wherein the punch roll is configured to rotate and to cut the second GDL into predetermined sizes.

3 . The EGA fabrication apparatus according to claim 2 , wherein the attachment roll is configured to hold the second GDL on a surface of the attachment roll.

4 . The EGA fabrication apparatus according to claim 3 , wherein the attachment roll is configured to hold the second GDL through vacuum suction.

5 . The EGA fabrication apparatus according to claim 4 , wherein the attachment roll comprises:
a vacuum line through which vacuum is supplied; a plurality of conduits disposed in the attachment roll and spaced apart from each other in a circumferential direction of the attachment roll, wherein each conduit has a plurality of holes; and a plurality of valves provided on the conduits, the plurality of valves being configured to open and close to selectively connect the conduits to the vacuum line.

6 . The EGA fabrication apparatus according to claim 5 , wherein the attachment roll further comprises:
a fixed part to which the vacuum line is connected; and a rotatable part configured to rotate about the fixed part and comprising the plurality of conduits and the plurality of valves, wherein an identification sensor is provided on each of the plurality of conduits, at least two identifiers are disposed on the fixed part to operate in concert with the identification sensor, and the at least two identifiers comprise a first identifier and a second identifier.

7 . The EGA fabrication apparatus according to claim 6 , wherein opening of the plurality of valves is determined based on detection of the first identifier by the identification sensor and rotation of the punch roll.

8 . The EGA fabrication apparatus according to claim 6 , wherein closing of the plurality of valves is determined based on detection of the second identifier by the identification sensor.

9 . The EGA fabrication apparatus according to claim 2 , further comprising an electrode detection sensor disposed upstream of the downstream press, the electrode detection sensor being configured to detect arrival of the continuously supplied MEA;
wherein the electrode detection sensor is configured to provide position information of the MEA so that when the MEA is supplied to the downstream press, the MEA meets a punched portion of the second GDL.

10 . The EGA fabrication apparatus according to claim 1 , wherein the EGA comprises:
an electrolyte membrane; a positive electrode attached to a first surface of the electrolyte membrane; and a negative electrode attached to a second surface of the electrolyte membrane, the first surface being opposite to the second surface.

11 . An electricity-generating assembly (EGA) fabrication method comprising:
continuously supplying a membrane-electrode assembly (MEA) by an MEA unwinding part; attaching a first gas diffusion layer (GDL) to a first surface of the MEA using an upstream press disposed upstream in a flow direction of the MEA, wherein the first GDL is continuously supplied; attaching a second GDL to a second surface of the MEA using a downstream press disposed downstream in the flow direction of the MEA; and obtaining an EGA by attaching the second GDL to the MEA.

12 . The EGA fabrication method according to claim 11 , wherein the downstream press comprises:
a rotatable attachment roll; and a rotatable lower roll configured such that the MEA to which the first GDL is attached passes between the rotatable lower roll and the rotatable attachment roll.

13 . The EGA fabrication method according to claim 12 , wherein the attachment of the second GDL comprises:
continuously supplying the second GDL to the rotatable attachment roll; punching the second GDL into predetermined sizes using a punch roll; and attaching punched portions of the second GDL to the MEA to which the first GDL is attached when the MEA is supplied to the rotatable attachment roll.

14 . The EGA fabrication method according to claim 13 , wherein an electrode detection sensor is disposed upstream of the rotatable attachment roll;
wherein the electrode detection sensor is configured to detect approach of the MEA to which the first GDL is attached to the rotatable attachment roll using the electrode detection sensor; and when the MEA to which the first GDL is attached is supplied to the rotatable attachment roll based on detection of the electrode detection sensor, the punched portions of the second GDL are supplied.

15 . The EGA fabrication method according to claim 14 , wherein the attachment of the second GDL comprises:
detecting the rotatable attachment roll located at a first detection position; determining whether the punch roll is rotating; and supplying vacuum to a first portion of the rotatable attachment roll in response to the rotation of the punch roll.

16 . The EGA fabrication method according to claim 15 , further comprising:
detecting the rotatable attachment roll located at a second detection position; and blocking supply of vacuum to the first portion of the rotatable attachment roll.

17 . The EGA fabrication method according to claim 11 , wherein obtaining the EGA comprises winding the EGA into a roll.

18 . The EGA fabrication method according to claim 11 , further comprising, before the attachment of the second GDL, continuously attaching a protective film on the second surface of the MEA.

19 . The EGA fabrication method according to claim 13 , further comprising collecting a scrap portion of the punched second GDL using a second GDL scrap winding part.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Kim Min Jin
• Yang Hyun Gak

Classifications

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M8/1004 Primary

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M8/0297

  Arrangements for joining electrodes, reservoir layers, heat exchange units or bipolar separators to each other (H01M8/0271 takes precedence) · CPC title

• H01M8/0271 Primary

  Sealing or supporting means around electrodes, matrices or membranes · CPC title

• B21D39/031 Primary

  Joining superposed plates by locally deforming without slitting or piercing · CPC title