Porous body quality inspection apparatus and method for inspecting quality of porous body

Patent metadata

Field	Value
Publication number	US-11495837-B2
Application number	US-201816483493-A
Country	US
Kind code	B2
Filing date	Feb 12, 2018
Priority date	Feb 13, 2017
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

The present application relates to a porous body quality inspection apparatus and a method for inspecting quality of a porous body, and according to one aspect of the present application, there is provided a porous body quality inspection apparatus comprising a contact resistance measuring part of a porous body with a gas diffusion layer, a pressurizing part for pressurizing a pressure-sensitive discoloration base material on the porous body, an image mapping part for calculating a contact area between the pressure-sensitive discoloration base material and the porous body, a transporting part for transporting the porous body and the pressure-sensitive discoloration base material, and an operation part for performing an operation of an interfacial contact resistance between the porous body and the gas diffusion layer.

First claim

What is claimed is:

1. A porous body quality inspection apparatus comprising:
a measuring part for measuring a contact resistance between a porous body and a gas diffusion layer;
a pressurizing part for pressurizing a pressure-sensitive discoloration base material on the porous body;
an image mapping part for calculating a contact area between the pressure-sensitive discoloration base material and the porous body based on a discolored region of the pressurized pressure-sensitive discoloration base material;
a transporting part for transporting the porous body and the pressure-sensitive discoloration base material; and
an operation part for determining an interfacial contact resistance between the porous body and the gas diffusion layer based on the contact resistance and the contact area,

wherein the operation part is configured to determine the interfacial contact resistance using Equation 1 below:
ICR= R BP|GDL ×AC actual   [Equation 1]

wherein, ICR is the interfacial contact resistance between the porous body and the gas diffusion layer, R BP|GDL is the contact resistance between the porous body and the gas diffusion laver, and AC actual is the contact area between the pressure-sensitive discoloration base material and the porous body calculated based on the discolored region of the pressurized pressure-sensitive discoloration base material.

2. The porous body quality inspection apparatus according to claim 1 , wherein the measuring part comprises a holder on which the gas diffusion layer is disposed and a contact resistance measurement sensor.

3. The porous body quality inspection apparatus according to claim 1 , wherein the pressurizing part comprises a pressure-sensitive discoloration base material transport roller and a pressure roller.

4. The porous body quality inspection apparatus according to claim 3 , wherein the pressurizing part is configured to pressurize the pressure-sensitive discoloration base material that is placed on the porous body by the pressure-sensitive discoloration base material transport roller by a predetermined pressure using the pressure roller.

5. The porous body quality inspection apparatus according to claim 4 , wherein the gas diffusion layer is a first gas diffusion layer, and the porous body is configured to contact a second gas diffusion layer of a fuel cell stack, and wherein the predetermined pressure is a pressure corresponding to a pressure on the porous body when the porous body contacts the second gas diffusion layer of the fuel cell stack.

6. The porous body quality inspection apparatus according to claim 1 , wherein the image mapping part comprises a collection part for separately collecting the pressurized pressure-sensitive discoloration base material from the porous body and a scanner for scanning the discolored region of the collected pressure-sensitive discoloration base material.

7. The porous body quality inspection apparatus according to claim 1 , wherein the measuring part comprises a gauge sensor for measuring a thickness of the porous body.

8. The porous body quality inspection apparatus according to claim 1 , further comprising a weight measuring part for measuring a weight of the porous body.

9. The porous body quality inspection apparatus according to claim 8 , wherein the weight measuring part comprises a tray supported by an elastic body, in which the porous body is stacked and housed.

10. The porous body quality inspection apparatus according to claim 1 , further comprising a product selection part including a vacuum adsorption part.

11. The porous body quality inspection apparatus according to claim 1 , comprising a display part for outputting one or more of the contact resistance, the contact area and the interfacial contact resistance.

12. A method for inspecting quality of a porous body, the method comprising:
measuring a contact resistance between a porous body and a gas diffusion layer;
pressurizing a pressure-sensitive discoloration base material that is placed on the porous body by a predetermined pressure;
calculating a contact area between the pressure-sensitive discoloration base material and the porous body based on a discolored region of the pressurized pressure-sensitive discoloration base material; and
determining an interfacial contact resistance between the porous body and the gas diffusion layer based on the contact resistance and the contact area,

wherein determining the interfacial contact resistance comprises determining the interfacial contact resistance using Equation 1 below:
ICR= R BP|GDL ×AC actual   [Equation 1]

wherein, ICR is the interfacial contact resistance between the porous body and the gas diffusion layer, R BP|GDL is the contact resistance between the porous body and the gas diffusion layer, and AC actual is the contact area between the pressure-sensitive discoloration base material and the porous body calculated based on the discolored region of the pressurized pressure-sensitive discoloration base material.

13. The method for inspecting quality of a porous body according to claim 12 , wherein the gas diffusion layer is a first gas diffusion layer, and the porous body is configured to contact a second gas diffusion layer of a fuel cell stack, and wherein the predetermined pressure is a pressure corresponding to a pressure on the porous body when the porous body contacts the second gas diffusion layer of the fuel cell stack.

Assignees

• Lg Chemical Ltd

Inventors

• Jung Hye Mi
• Kang Kyung Mun
• Yang Jae Choon

Classifications

• H01M8/04305 Primary

  Modeling, demonstration models of fuel cells, e.g. for training purposes · CPC title

• G01N27/04

  by investigating resistance · CPC title

• H01M8/0232

  Metals or alloys · CPC title

• H01M8/0206

  Metals or alloys · CPC title

• G01N15/08 Primary

  Investigating permeability, pore-volume, or surface area of porous materials · CPC title