A fuel cell membrane electrode anode and cathode coating test device

Abstract

The utility model relates to hydrogen fuel cell manufacturing technical field, concretely is a kind of fuel cell membrane electrode cathode and anode coating testing device, through to the detection of cathode and anode surface before fuel cell chip sticking, completely avoid the problem of sticking reverse in fuel cell chip packaging process.Specifically includes: resistance testing device and fuel cell chip;Resistance testing device includes probe base, probe, ohmmeter and alarm device;The fuel cell chip is connected with the probe;Probe base is provided with probe, and probe is connected with the ohmmeter, and the ohmmeter is connected with the alarm device, and the resistance value of the ohmmeter test exceeds set resistance threshold value, then alarm device will alarm prompt.The device can distinguish cathode and anode coating in membrane electrode manufacturing process.

Description

Technical Field

[0001] This utility model belongs to the field of hydrogen fuel cell manufacturing technology, and specifically relates to a fuel cell membrane electrode anode and cathode coating testing device. Background Technology

[0002] The membrane electrode assembly (MEA), a key component of a fuel cell stack, consists of a proton exchange membrane (PEM) and symmetrically arranged catalyst and gas diffusion layers on both sides of the MEM. The MEM and its catalyst layers together form the fuel cell chip (CCM). The anode and cathode coatings on both sides of the MEM are primarily made of carbon powder and catalyst, with similar compositions but varying amounts, making them difficult to distinguish visually based on appearance and color. During MEA manufacturing, especially at the CCM manual handling station, it is easy to accidentally install the anode and cathode in reverse. In operation, hydrogen is supplied to the anode and oxygen to the cathode via bipolar plates, where an electrochemical reaction occurs under the action of the CCM. If the CCM is installed in reverse on the MEA, it will severely degrade the stack's performance during operation, and prolonged operation may even lead to the MEA burning through, resulting in serious consequences.

[0003] Existing patent CN222125347U discloses a fuel cell membrane electrode catalytic layer impedance testing device, including conductive adhesive, conductive wires, and an electrochemical workstation. The reference electrode and counter electrode of the electrochemical workstation are both located on the anode current collector or cathode current collector of the cell under test. The working electrode is connected to the corresponding anode or cathode catalytic layer of the cell under test via the conductive wires. The conductive adhesive is adhered to the connection points of the conductive wires, anode catalytic layers, or cathode catalytic layers. The length of the conductive wires extends from the connection points of the corresponding anode or cathode catalytic layers of the cell under test to the outside of the cell. Although it is used for fuel cell membrane electrode anode and cathode impedance testing, it is applied to assessing the catalytic activity of the anode and cathode, not to probing the anode and cathode surfaces before CCM bonding. Furthermore, it is costly and requires high accuracy in impedance testing.

[0004] To address the aforementioned problems, this invention provides a testing device for distinguishing between anode and cathode coatings during the manufacturing process of membrane electrodes. Utility Model Content

[0005] To address the technical problem of reversed bonding during CCM encapsulation in existing technologies, this invention provides a fuel cell membrane electrode anode and cathode coating testing device. This device can distinguish between the anode and cathode coatings during membrane electrode manufacturing and can maximize the protection of the CCM from damage.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A testing device for the anode and cathode coatings of a fuel cell membrane electrode includes: a resistance testing device and a fuel cell chip; the resistance testing device includes a probe holder, a probe, a resistance meter, and an alarm device; the fuel cell chip is connected to the probe; the probe holder is provided with a probe, the probe is connected to the resistance meter, and the resistance meter is connected to the alarm device; if the resistance value measured by the resistance meter exceeds a set resistance threshold, the alarm device will issue an alarm.

[0007] As a preferred embodiment, the probe provided by this invention is an elastic probe.

[0008] As a preferred embodiment, the probe head provided by this invention is spherical in shape.

[0009] As a preferred embodiment, the fuel cell chip provided by this utility model includes a proton exchange membrane, an anode coating, and a cathode coating, wherein the anode coating and the cathode coating are located on opposite sides of the proton exchange membrane, and the thickness of the anode coating is less than the thickness of the cathode coating.

[0010] As a preferred embodiment, the thickness of the anode coating provided by this invention is 2-3 times the thickness of the cathode coating.

[0011] As a preferred embodiment, the anode coating and cathode coating provided by this invention contain carbon powder, which is a conductor.

[0012] As a preferred embodiment, the fuel cell chip provided by this utility model includes a frame bonding area, a waste area, and a reaction area. The probe is connected to the frame bonding area or the waste area, but not to the reaction area.

[0013] As a preferred embodiment, the proton exchange membrane provided by this invention is an insulator, and the probe holder is an insulating probe holder.

[0014] As a preferred embodiment, the present invention also includes a vacuum adsorption plate on which a fuel cell chip is placed.

[0015] As a preferred embodiment, the set resistance threshold provided by this invention is the intermediate value of the surface resistance of the anodic coating and the cathode coating.

[0016] Compared with the prior art, the beneficial effects provided by this utility model are as follows: (1) The fuel cell membrane electrode anode and cathode coating testing device provided by this utility model can distinguish the cathode coating and anode coating by measuring the relationship between the thickness of the anode coating and the resistance value, thereby avoiding the technical problem of reverse bonding during CCM packaging.

[0017] (2) The probe head provided by this utility model is shaped like a ball to protect the CCM from being crushed. The test area is set in the CCM frame bonding area or waste area, rather than the reaction area, which can protect the CCM from being damaged to the greatest extent.

[0018] (3) This utility model provides a resistance testing device, which includes a probe holder, a probe, a resistor meter and an alarm device; the fuel cell chip is connected to the probe; the probe holder is provided with a probe, the probe is connected to the resistor meter, the resistor meter is connected to the alarm device, and if the resistance value tested by the resistor meter exceeds the set resistance threshold, the alarm device will sound an alarm; by detecting the anode and cathode surfaces before CCM bonding through the resistance testing device, the problem of CCM being bonded backwards during the packaging process is completely avoided. Attached Figure Description

[0019] Figure 1 A schematic diagram of the CCM structure provided for an embodiment of this utility model; Figure 2 This utility model provides a fuel cell membrane electrode anode and cathode coating testing device. Figure 3 The diagram below illustrates the basis for setting the resistance threshold provided by this utility model.

[0020] Explanation of reference numerals in the attached figures: 1: Proton exchange membrane; 2: Anode coating; 3: Cathode coating; 4: CCM; 5: Probe holder; 6: Probe; 7: Resistance meter; 8: Alarm device; 9: Vacuum adsorption plate. Detailed Implementation

[0021] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] It should be noted that, unless otherwise specifically stated, the relative arrangement and numerical expressions of the components and steps described in these embodiments should not be construed as limiting the scope of this utility model.

[0023] The following description of exemplary embodiments is merely illustrative and is not intended to limit the present invention or its application or use in any way. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but where applicable, such techniques, methods, and apparatus should be considered part of this specification.

[0024] Example 1 See Figure 1The fuel cell chip provided by this utility model includes a proton exchange membrane 1, an anode coating 2, and a cathode coating 3. The anode coating 2 and cathode coating 3 are located on opposite sides of the proton exchange membrane 1, and the thickness of the anode coating 2 is less than the thickness of the cathode coating 3. The thickness of the anode coating 2 is 2-3 times the thickness of the cathode coating 3. The anode coating 2 and cathode coating 3 contain carbon powder, which is a conductor.

[0025] See Figure 2 This utility model discloses a fuel cell membrane electrode anode and cathode coating testing device, comprising: a resistance testing device and a fuel cell chip (CCM) 4; the resistance testing device includes a probe holder 5, a probe 6, a resistance meter 7, and an alarm device 8; the fuel cell chip 4 is connected to the probe 6; the probe holder 5 is provided with the probe 6, the probe 6 is connected to the resistance meter 7, and the resistance meter 7 is connected to the alarm device 8; if the resistance value measured by the resistance meter exceeds a set resistance threshold, the alarm device will issue an alarm.

[0026] like Figure 2 As shown, the probe provided by this utility model is an elastic probe with a ball-shaped probe head to protect the CCM from being crushed.

[0027] In a preferred embodiment, the fuel cell chip 4 provided by this invention includes a frame bonding area, a waste area, and a reaction area. The probe 6 is connected to the frame bonding area or the waste area, but not to the reaction area. In a preferred embodiment, the proton exchange membrane provided by this invention is an insulator, and the probe holder is an insulating probe holder.

[0028] In a preferred embodiment, the present invention further includes a vacuum adsorption plate 9 on which a fuel cell chip 4 is placed. The vacuum adsorption plate is used to adsorb the CCM, ensuring that it is flat and adhered to the vacuum adsorption plate.

[0029] like Figure 3 As shown, the set resistance threshold provided by this invention can be the intermediate value of the surface resistance of the anode coating and the cathode coating, thereby improving the detectability of the device. Taking a certain CCM as an example, it can be set according to... Figure 3 Set the decision threshold.

[0030] Testing process: On the CCM cutting and bonding equipment, the anode and cathode of the CCM are determined by testing the resistance value. In the membrane electrode manufacturing process, the CCM is first placed on a vacuum suction plate and flattened, then it is cut to its final size by a cutting machine, and finally it is bonded to the membrane electrode frame.

[0031] This invention relates to a resistance testing device designed on a CCM cutting equipment, comprising an insulating probe holder, a round-headed elastic probe, and a resistance meter.

[0032] After the CCM is flattened on the vacuum adsorption plate, the vacuum adsorption plate first moves to the bottom of the probe holder. The probe holder drives the elastic probe to move downward and contact the CCM surface. The resistance tester tests the surface resistance of the CCM. If the resistance value meets the set range, the CCM vacuum adsorption plate continues to move to the next process. If the resistance value is no longer within the set range, the equipment will stop running and issue an alarm.

[0033] In the above device, the probe tip is selected in a ball shape to protect the CCM from being crushed. The test area is set in the CCM frame bonding area or waste area, rather than the reaction area, which can protect the CCM from damage to the greatest extent.

[0034] In summary, this device features well-selected components, clear connection methods, and a simple overall structure. It ensures the timeliness and accuracy of measurement and data transmission, while also possessing good feasibility and application value. It can provide a stable and reliable technical solution for cable measurement work in related fields.

[0035] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A testing device for the anode and cathode coatings of a fuel cell membrane electrode, characterized in that, include: Resistance testing equipment and fuel cell chip; The resistance testing device includes a probe holder, probes, a resistance meter, and an alarm device; The fuel cell chip is connected to the probe; the probe holder is provided with a probe, which is connected to the resistor, and the resistor is connected to the alarm device. If the resistance value measured by the resistor exceeds the set resistance threshold, the alarm device will issue an alarm.

2. The fuel cell membrane electrode anode and cathode coating testing device according to claim 1, characterized in that, The probe is an elastic probe.

3. The fuel cell membrane electrode anode and cathode coating testing device according to claim 2, characterized in that, The probe head is spherical in shape.

4. The fuel cell membrane electrode anode and cathode coating testing device according to claim 1, characterized in that, The fuel cell chip includes a proton exchange membrane, an anode coating, and a cathode coating. The anode coating and cathode coating are located on opposite sides of the proton exchange membrane, and the thickness of the anode coating is less than the thickness of the cathode coating.

5. The fuel cell membrane electrode anode and cathode coating testing device according to claim 4, characterized in that, The thickness of the anode coating is 2-3 times that of the cathode coating.

6. The fuel cell membrane electrode anode and cathode coating testing device according to claim 4, characterized in that, The anode and cathode coatings contain carbon powder, which is a conductor.

7. The fuel cell membrane electrode anode and cathode coating testing device according to claim 4, characterized in that, The fuel cell chip includes a frame bonding area, a waste area, and a reaction area. The probe is connected to the frame bonding area or the waste area, but not to the reaction area.

8. The fuel cell membrane electrode anode and cathode coating testing device according to claim 4, characterized in that, The proton exchange membrane is an insulator, and the probe holder is an insulating probe holder.

9. The fuel cell membrane electrode anode and cathode coating testing device according to claim 1, characterized in that, It also includes a vacuum adsorption plate on which fuel cell chips are placed.

10. The fuel cell membrane electrode anode and cathode coating testing device according to claim 1, characterized in that, The set resistance threshold is the intermediate value of the surface resistance of the anodic coating and the cathode coating.

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