Detection method and detection device

Abstract

The application provides a detection method and a detection device, which comprises the following steps: arranging a membrane electrode between an anode plate and a cathode plate of the detection device, and controlling the compression rate of the membrane electrode within a preset compression range; electrically connecting the anode plate and the cathode plate with a power supply component of the detection device, and electrically connecting the anode plate and the cathode plate with a voltage detection component of the detection device; controlling the power supply component to supply constant current; setting multiple detection time points within a charging time range in the charging process of the membrane electrode, detecting the voltage values at the multiple detection time points by the voltage detection component, and fitting a voltage-time change curve of the membrane electrode in the charging process; the charging time range in the charging process of the membrane electrode has a preset time point; and judging whether the test voltage of the membrane electrode is qualified according to the voltage value of the membrane electrode at the preset time point. The application solves the problem of low detection efficiency of the membrane electrode in the prior art.

Description

Technical Field

[0001] This invention relates to the field of detection technology for fuel cell membrane electrodes, and more specifically, to a detection method and a detection device. Background Technology

[0002] A proton exchange membrane fuel cell (PEMFC) is an energy device that directly converts the chemical energy stored in fuel and oxidant into electrical energy. It boasts advantages such as high energy conversion efficiency, low environmental pollution, and long service life, making it suitable for various applications including transportation, power plants, and portable power sources, and possessing broad market prospects. Among these components, the membrane electrode assembly (MEA), as a crucial element of the fuel cell, is vitally important in terms of both production cost and efficiency.

[0003] Currently, the existing technology for detecting whether a membrane electrode is qualified is as follows: the electrochemical parameters of the membrane electrode are analyzed by voltage detection, the airtightness of the membrane electrode is tested, and the qualification of the membrane electrode is determined based on the electrochemical parameters and airtightness.

[0004] On the one hand, the device for detecting the voltage parameters required for analyzing the electrochemical parameters of the membrane electrode is structurally complex and requires a hydrogen environment for detection, which makes the operation of voltage parameter detection complicated and time-consuming, resulting in low detection efficiency. On the other hand, the device for detecting the voltage parameters required for analyzing the electrochemical parameters of the membrane electrode and the device for detecting the gas tightness of the membrane electrode are two independent devices, which are difficult to operate simultaneously, thus resulting in low detection efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a detection method and detection device to solve the problem of low efficiency in the detection of membrane electrodes in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a detection method is provided, comprising: step S1: clamping a membrane electrode between an anode plate and a cathode plate of a detection device, and controlling the compression ratio of the membrane electrode within a preset compression range; the compression ratio is the ratio of the compression amount of the membrane electrode to the thickness of the membrane electrode before compression, and the compression amount of the membrane electrode is the difference between the thickness of the membrane electrode before compression and the thickness of the membrane electrode after compression; step S2: electrically connecting both the anode plate and the cathode plate to a power supply component of the detection device, and electrically connecting both the anode plate and the cathode plate to a voltage detection component of the detection device, so that the voltage detection component detects the voltage value of the membrane electrode; step S3: controlling the power supply component to provide constant current power to charge the membrane electrode; wherein, multiple detection time points are set within the charging time range during the charging process of the membrane electrode, so that the voltage detection component detects the voltage value at the multiple detection time points to fit a voltage change curve of the membrane electrode over time during the charging process; the preset time points are included within the charging time range during the charging process of the membrane electrode; and determining whether the test voltage of the membrane electrode is qualified based on the voltage value of the membrane electrode at the preset time point.

[0007] Furthermore, the detection device includes two electrode plates, namely an anode plate and a cathode plate; each electrode plate is provided with a flow hole, the first end of which extends to the plate surface of the electrode plate facing the membrane electrode, and the second end of which extends to the outer peripheral wall of the electrode plate; while the power supply component charges the membrane electrode, the detection method also includes: connecting and communicating the second port of the flow hole of one electrode plate of the detection device with the gas path of the flow meter, and introducing gas into the second port of the flow hole of the other electrode plate; during the process of introducing gas into the second port of the flow hole of the other electrode plate, judging whether the airtightness of the membrane electrode is qualified based on the reading of the flow meter.

[0008] Furthermore, by controlling the pressing force of the anode plate and cathode plate on the membrane electrode within a preset pressing range, the compression ratio of the membrane electrode is controlled within a preset compression range.

[0009] Furthermore, the preset compression range is greater than 0 and less than or equal to 40%; and / or the preset time point ranges from 0.5 seconds to 20 seconds.

[0010] Furthermore, the method for determining whether the airtightness of the membrane electrode is qualified includes: when the flow meter reading is less than the preset flow rate, the airtightness of the membrane electrode is qualified; when the flow meter reading is greater than or equal to the preset flow rate, the airtightness of the membrane electrode is unqualified.

[0011] Furthermore, the method for determining whether the test voltage of the membrane electrode is qualified includes: when the voltage value of the membrane electrode at a preset time point is greater than a first preset voltage value or less than a second preset voltage value, the test voltage of the membrane electrode is determined to be unqualified; when the voltage value of the membrane electrode at a preset time point is greater than or equal to the second preset voltage value and less than or equal to the first preset voltage value, the test voltage of the membrane electrode is determined to be qualified; wherein, the first preset voltage value is greater than the second preset voltage value.

[0012] Furthermore, the first preset voltage value ranges from 0.3V to 1.5V; the second preset voltage value ranges from 0.1V to 0.8V.

[0013] Furthermore, the power supply component supplies power with a preset current, the value of which ranges from 0.01A to 5A.

[0014] According to another aspect of the present invention, a detection device is provided, which is applicable to the above-described detection method. The detection device includes: two electrode plates disposed opposite to each other, the two electrode plates being an anode plate and a cathode plate, and a clamping space for clamping a membrane electrode is formed between the anode plate and the cathode plate; a power supply component, the anode plate and the cathode plate being electrically connected to the power supply component so that the power supply component supplies a constant current to the membrane electrode; and a voltage detection component, the anode plate and the cathode plate being electrically connected to the voltage detection component so that the voltage detection component detects the voltage value of the membrane electrode.

[0015] Furthermore, the detection device also includes a constant current power supply, which comprises a power supply component and a voltage detection component.

[0016] The detection method using the technical solution of this invention includes: Step S1: clamping the membrane electrode assembly (MEA) of the fuel cell between the anode plate and the cathode plate of the detection device, whereby the anode plate and cathode plate press-fit the MEA, compressing it; controlling the compression rate of the MEA within a preset compression range; the compression rate is the ratio of the compression amount of the MEA to its thickness before compression, where the compression amount is the difference between the thickness of the MEA before compression and the thickness of the MEA after compression; Step S2: electrically connecting both the anode plate and the cathode plate to the power supply component of the detection device, and connecting both the anode plate and the cathode plate to the detection device... The voltage detection component of the device is electrically connected to detect the voltage value of the membrane electrode; Step S3: Control the power supply component to provide constant current to charge the membrane electrode; wherein, multiple detection time points are set within the charging time range during the charging process of the membrane electrode, so that the voltage detection component detects the voltage value at multiple detection time points to fit the voltage change curve of the membrane electrode over time during the charging process; within the charging time range during the charging process of the membrane electrode, there are preset time points; based on the voltage value of the membrane electrode at the preset time point, it is determined whether the test voltage of the membrane electrode is qualified.

[0017] The detection method of this application detects whether the test voltage of the membrane electrode is qualified by charging the membrane electrode, so as to determine whether the membrane electrode is qualified. Compared with the existing method of analyzing the electrochemical parameters of the membrane electrode to determine whether the membrane electrode is qualified, the detection method of this application is simple to operate and the detection process is less time-consuming, which greatly improves the efficiency of membrane electrode detection and solves the problem of low efficiency of membrane electrode detection in the prior art. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 A schematic diagram of the detection device according to the present invention is shown;

[0020] Figure 2 A schematic diagram of the electrode plate of the detection device according to the present invention is shown;

[0021] Figure 3 The diagram shows the voltage variation over time of the five membrane electrodes during charging using the detection method of the present invention.

[0022] The above figures include the following reference numerals:

[0023] 10. Anode plate; 20. Cathode plate; 30. Constant current power supply; 40. Voltage acquisition unit; 50. Electrode plate; 51. Flow hole;

[0024] 200, membrane electrode; 201, first membrane electrode; 202, second membrane electrode; 203, third membrane electrode; 204, fourth membrane electrode; 205, fifth membrane electrode. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] This invention provides a detection method, please refer to... Figure 1 and Figure 2 The detection method includes: Step S1: The membrane electrode 200 of the fuel cell is clamped between the anode plate 10 and the cathode plate 20 of the detection device. The anode plate 10 and the cathode plate 20 will press the membrane electrode 200, and the membrane electrode 200 will be compressed. The compression rate of the membrane electrode 200 is controlled within a preset compression range. The compression rate is the ratio of the compression amount of the membrane electrode 200 to the thickness of the membrane electrode 200 before compression. The compression amount of the membrane electrode 200 is the difference between the thickness of the membrane electrode 200 before compression and the thickness of the membrane electrode 200 after compression. Step S2: The anode plate 10 and the cathode plate 20 are electrically connected to the power supply component of the detection device, and the anode plate 10 and the cathode plate 20 are connected to the power supply component of the detection device. All 20 are electrically connected to the voltage detection component of the detection device so that the voltage detection component can detect the voltage value of the membrane electrode 200; Step S3: Control the power supply component to provide constant current power to charge the membrane electrode 200; wherein, multiple detection time points are set within the charging time range during the charging process of the membrane electrode 200, so that the voltage detection component detects the voltage value at multiple detection time points to fit the voltage change curve of the membrane electrode 200 during the charging process; within the charging time range during the charging process of the membrane electrode 200, there are preset time points; based on the voltage value of the membrane electrode 200 at the preset time point, it is determined whether the test voltage of the membrane electrode 200 is qualified.

[0029] It should be noted that, along the thickness direction of the membrane electrode 200, the membrane electrode 200 has an anode side and a cathode side. When the membrane electrode 200 is not compressed, the anode side and the cathode side of the membrane electrode 200 are in a disconnected state and do not contact each other. The membrane electrode 200 needs to be compressed to make the anode side and the cathode side of the membrane electrode 200 contact each other, thereby making the anode side and the cathode side of the membrane electrode 200 electrically connected. When the compressive force acting on the membrane electrode 200 disappears, the membrane electrode 200 will expand to return to the disconnected state where the anode side and the cathode side do not contact each other.

[0030] The detection method of this application detects whether the test voltage of the membrane electrode 200 is qualified by charging the membrane electrode 200, so as to determine whether the membrane electrode 200 is qualified. Compared with the existing method of analyzing the electrochemical parameters of the membrane electrode to determine whether the membrane electrode is qualified, the detection method of this application is simple to operate and the detection process is short, which greatly improves the efficiency of detecting the membrane electrode 200 and solves the problem of low efficiency of membrane electrode detection in the prior art.

[0031] It should be noted that the voltage parameters required for analyzing the electrochemical parameters of membrane electrodes in the prior art are different from the voltage of the membrane electrode 200 detected in this application. Therefore, the qualification of the membrane electrode cannot be directly determined based on the voltage parameters required for analyzing the electrochemical parameters of membrane electrodes in the prior art.

[0032] In addition, the detection method of this application can be carried out in a normal environment and does not require a special environment such as hydrogen, so there is no gas safety hazard, making the detection method of this application highly safe.

[0033] Specifically, the preset compression range is greater than 0 and less than or equal to 40%.

[0034] Specifically, the preset time point can be one of multiple detection time points, or it can be any of the detection time points.

[0035] Specifically, the preset time point ranges from 0.5 seconds to 20 seconds; the value of the preset time point is determined according to the type of membrane electrode 200.

[0036] Optionally, the preset time point is 2 seconds, which is the time point when the power supply component charges the membrane electrode 200 for 2 seconds.

[0037] Specifically, the power supply component supplies constant current to the membrane electrode 200 with a preset current, the preset current ranging from 0.01A to 5A.

[0038] In this embodiment, in step S1, the compression ratio of the membrane electrode 200 is controlled within a preset compression range by controlling the pressing force of the anode plate 10 and the cathode plate 20 on the membrane electrode 200 within a preset pressing range.

[0039] Optionally, the preset pressing range is 2NM to 15NM; where NM is the torque unit, N is Newton and M is meter.

[0040] In this embodiment, the method for determining whether the test voltage of the membrane electrode 200 is qualified includes: when the voltage value of the membrane electrode 200 at a preset time point is greater than a first preset voltage value or less than a second preset voltage value, the test voltage of the membrane electrode 200 is determined to be unqualified; when the voltage value of the membrane electrode 200 at a preset time point is greater than or equal to the second preset voltage value and less than or equal to the first preset voltage value, the test voltage of the membrane electrode 200 is determined to be qualified; wherein, the first preset voltage value is greater than the second preset voltage value.

[0041] Specifically, the first preset voltage value ranges from 0.3V to 1.5V; the second preset voltage value ranges from 0.1V to 0.8V; both the first and second preset voltage values ​​are determined according to the type of membrane electrode 200.

[0042] Optionally, the first preset voltage value is 0.35V, and the second preset voltage value is 0.25V.

[0043] In this embodiment, the detection device includes two electrode plates 50, namely an anode plate 10 and a cathode plate 20; each electrode plate 50 is provided with a flow hole 51, the first end of the flow hole 51 extends to the plate surface of the electrode plate 50 facing the membrane electrode 200, and the second end of the flow hole 51 extends to the outer peripheral wall of the electrode plate 50.

[0044] While the power supply component charges the membrane electrode 200, the detection method also includes: connecting and communicating the second port of the flow hole 51 of one electrode plate 50 of the detection device with the gas path of the flow meter, and introducing gas into the second port of the flow hole 51 of the other electrode plate 50; during the process of introducing gas into the second port of the flow hole 51 of the other electrode plate 50, judging whether the air tightness of the membrane electrode 200 is qualified based on the reading of the flow meter.

[0045] As can be seen, the detection method of this application can simultaneously detect the test voltage and airtightness of the membrane electrode 200, which is beneficial to improving the efficiency of detecting the membrane electrode 200.

[0046] It should be noted that, theoretically, gas cannot pass through the membrane electrode 200, so if gas is supplied to one side of the membrane electrode 200, no gas will be collected on the other side; if there is gas on the other side of the membrane electrode 200, the amount of gas on the other side of the membrane electrode 200 is the amount of gas passing through the membrane electrode 200; the reading of the flow meter is the amount of gas passing through the membrane electrode 200.

[0047] In this embodiment, the method for determining whether the airtightness of the membrane electrode 200 is qualified includes: when the flow meter reading is less than the preset flow rate, the airtightness of the membrane electrode 200 is qualified; when the flow meter reading is greater than or equal to the preset flow rate, the airtightness of the membrane electrode 200 is unqualified.

[0048] The present invention also provides a detection device for detecting the membrane electrode 200 of a fuel cell, and this detection device is applicable to the above-described detection method; as follows. Figure 1 and Figure 2 As shown, the detection device includes two electrode plates 50 arranged opposite each other, a power supply component, and a voltage detection component. The two electrode plates 50 are an anode plate 10 and a cathode plate 20, respectively, forming a clamping space between the anode plate 10 and the cathode plate 20 for clamping the membrane electrode 200. Both the anode plate 10 and the cathode plate 20 are electrically connected to the power supply component so that the power supply component supplies a constant current to the membrane electrode 200. Both the anode plate 10 and the cathode plate 20 are electrically connected to the voltage detection component so that the voltage detection component detects the voltage value of the membrane electrode 200, thereby detecting the test voltage of the membrane electrode 200.

[0049] The detection device of this application has a simple structure, which makes it easy to operate the detection of the test voltage of the membrane electrode 200 using the detection device of this application, which is beneficial to improving the efficiency of detection of the membrane electrode 200.

[0050] Specifically, one surface of the anode plate 10 is used to contact one surface of the membrane electrode 200, and one surface of the cathode plate 20 is used to contact the other surface of the membrane electrode 200.

[0051] Specifically, the surface of the anode plate 10 and the surface of the cathode plate 20 are both greater than or equal to the surface of the membrane electrode 200.

[0052] In this embodiment, the detection device further includes a constant current power supply 30, which includes a power supply component and a voltage detection component, that is, the constant current power supply 30 has both power supply and voltage detection functions.

[0053] In the specific implementation process, the constant current power supply 30 is electrically connected to the anode plate 10 and the cathode plate 20, so as to realize that the power supply component is electrically connected to both the anode plate 10 and the cathode plate 20, and the voltage detection component is electrically connected to both the anode plate 10 and the cathode plate 20.

[0054] In this embodiment, there are two voltage detection components, namely a first voltage detection component and a second voltage detection component; the first voltage detection component is the voltage detection component included in the constant current power supply 30; the second voltage detection component is the voltage acquisition unit 40; by setting two voltage detection components, the voltage detection result of the membrane electrode 200 is ensured.

[0055] In the specific implementation process, the constant current power supply 30 is electrically connected to the anode plate 10 and the cathode plate 20, and the voltage acquisition device 40 is electrically connected to the anode plate 10 and the cathode plate 20.

[0056] In this embodiment, each electrode plate 50 is provided with a flow hole 51. The first end of the flow hole 51 extends to the plate surface of the electrode plate 50 facing the membrane electrode 200, and the second end of the flow hole 51 extends to the outer peripheral wall of the electrode plate 50. The second port of the flow hole 51 of one electrode plate 50 is used to connect and communicate with the gas path of the flow meter, and the second port of the flow hole 51 of the other electrode plate 50 is used to introduce gas to detect the air tightness of the membrane electrode 200. Therefore, the detection device of this application simultaneously performs the functions of detecting the test voltage and air tightness of the membrane electrode 200, which can simultaneously detect both the test voltage and air tightness of the membrane electrode 200, thus improving the efficiency of detecting the membrane electrode 200.

[0057] Optionally, such as Figure 2 As shown, the first end of the flow hole 51 extends to the plate surface of the electrode plate 50 facing the membrane electrode 200, and the second end of the flow hole 51 extends to the other plate surface of the electrode plate 50.

[0058] Specifically, the flow hole 51 on the anode plate 10 is a first flow hole, with its first end extending to the plate surface of the anode plate 10 facing the membrane electrode 200, and its second end extending to the outer peripheral wall of the anode plate 10. The flow hole 51 on the cathode plate 20 is a second flow hole, with its first end extending to the plate surface of the cathode plate 20 facing the membrane electrode 200, and its second end extending to the outer peripheral wall of the cathode plate 20.

[0059] Optionally, the second port of the first flow-through orifice is used to introduce gas, and the second port of the second flow-through orifice is used to connect and communicate with the gas path of the flow meter. Alternatively, the second port of the second flow-through orifice is used to introduce gas, and the second port of the first flow-through orifice is used to connect and communicate with the gas path of the flow meter.

[0060] The detection method of this application is used to detect multiple membrane electrodes 200 respectively, that is, the detection device of this application is used to detect multiple membrane electrodes 200 respectively. After the detection of one membrane electrode 200 is completed, the membrane electrode 200 is transferred to the next production step; then the other membrane electrode 200 is detected.

[0061] For example, the detection method of this application is used to detect five membrane electrodes 200 respectively, namely the first membrane electrode 201, the second membrane electrode 202, the third membrane electrode 203, the fourth membrane electrode 204 and the fifth membrane electrode 205. Figure 3The graphs showing the voltage changes of the five membrane electrodes 200 over time during charging are shown. The voltage of the second membrane electrode 202 after 2 seconds of charging is less than 0.25V, while the voltage of the fourth membrane electrode 204 after 2 seconds of charging is greater than 0.35V. Therefore, both the second and fourth membrane electrodes 202 and 204 are unqualified, meaning they are samples with missing coatings. The voltages of the first, third, and fifth membrane electrodes 201, 203, and 205 after 2 seconds of charging are all greater than 0.25V and less than 0.35V, therefore, the test voltages of the first, third, and fifth membrane electrodes 201 and 203 after 2 seconds of charging are all qualified.

[0062] In the specific implementation process, after the membrane electrode 200 is charged, the membrane electrode 200 is discharged so that when the voltage of the membrane electrode 200 drops to the third preset voltage, the discharge stops and the next membrane electrode 200 is replaced; or, the power can be turned off directly to replace the next membrane electrode 200.

[0063] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0064] In the detection method provided by the present invention, the detection method includes: Step S1: The membrane electrode 200 of the fuel cell is clamped between the anode plate 10 and the cathode plate 20 of the detection device. The anode plate 10 and the cathode plate 20 will press the membrane electrode 200, and the membrane electrode 200 will be compressed; the compression rate of the membrane electrode 200 is controlled within a preset compression range; the compression rate is the ratio of the compression amount of the membrane electrode 200 to the thickness of the membrane electrode 200 before compression, and the compression amount of the membrane electrode 200 is the difference between the thickness of the membrane electrode 200 before compression and the thickness of the membrane electrode 200 after compression; Step S2: The anode plate 10 and the cathode plate 20 are electrically connected to the power supply component of the detection device, and the anode plate... Both plate 10 and cathode plate 20 are electrically connected to the voltage detection component of the detection device so that the voltage detection component can detect the voltage value of membrane electrode 200; Step S3: Control the power supply component to provide constant current power to charge membrane electrode 200; wherein, multiple detection time points are set within the charging time range during the charging process of membrane electrode 200, so that the voltage detection component detects the voltage value at multiple detection time points to fit the voltage change curve of membrane electrode 200 during the charging process; within the charging time range during the charging process of membrane electrode 200, there are preset time points; based on the voltage value of membrane electrode 200 at the preset time point, it is determined whether the test voltage of membrane electrode 200 is qualified.

[0065] The detection method of this application detects whether the test voltage of the membrane electrode 200 is qualified by charging the membrane electrode 200, so as to determine whether the membrane electrode 200 is qualified. Compared with the existing method of analyzing the electrochemical parameters of the membrane electrode to determine whether the membrane electrode is qualified, the detection method of this application is simple to operate and the detection process is short, which greatly improves the efficiency of detecting the membrane electrode 200 and solves the problem of low efficiency of membrane electrode detection in the prior art.

[0066] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting a fuel cell membrane electrode assembly, characterized in that, include: Step S1: The membrane electrode (200) is sandwiched between the anode plate (10) and the cathode plate (20) of the detection device, and the compression ratio of the membrane electrode (200) is controlled within a preset compression range; the compression ratio is the ratio of the compression amount of the membrane electrode (200) to the thickness of the membrane electrode (200) before compression, and the compression amount of the membrane electrode (200) is the difference between the thickness of the membrane electrode (200) before compression and the thickness of the membrane electrode (200) after compression; Step S2: Connect both the anode plate (10) and the cathode plate (20) to the power supply component of the detection device, and connect both the anode plate (10) and the cathode plate (20) to the voltage detection component of the detection device, so that the voltage detection component detects the voltage value of the membrane electrode (200); Step S3: Control the power supply component to provide constant current to charge the membrane electrode (200); In this process, multiple detection time points are set within the charging time range during the charging process of the membrane electrode (200), so that the voltage detection component detects the voltage value at the multiple detection time points to fit the voltage change curve of the membrane electrode (200) over time during the charging process; within the charging time range during the charging process of the membrane electrode (200), there are preset time points; based on the voltage value of the membrane electrode (200) at the preset time points, it is determined whether the test voltage of the membrane electrode (200) is qualified; The detection device includes two electrode plates (50), which are the anode plate (10) and the cathode plate (20), respectively. Each electrode plate (50) has a flow hole (51), the first end of which extends to the surface of the electrode plate (50) facing the membrane electrode (200), and the second end of which extends to the outer peripheral wall of the electrode plate (50). While controlling the power supply component to charge the membrane electrode (200), the detection method also includes: The second port of the flow hole (51) of one electrode plate (50) of the detection device is connected to the gas path of the flow meter and gas is introduced into the second port of the flow hole (51) of the other electrode plate (50); during the process of introducing gas into the second port of the flow hole (51) of the other electrode plate (50), the air tightness of the membrane electrode (200) is judged according to the reading of the flow meter. By controlling the pressing force of the anode plate (10) and the cathode plate (20) on the membrane electrode (200) within a preset pressing range, the compression ratio of the membrane electrode (200) is controlled within the preset compression range; The preset compression range is greater than 0 and less than or equal to 40%; The preset time point ranges from 0.5 seconds to 20 seconds.

2. The detection method according to claim 1, characterized in that, The methods for determining whether the airtightness of the membrane electrode (200) is qualified include: When the reading of the flow meter is less than the preset flow rate, the airtightness of the membrane electrode (200) is determined to be qualified; When the reading of the flow meter is greater than or equal to the preset flow rate, the airtightness of the membrane electrode (200) is determined to be unqualified.

3. The detection method according to claim 1, characterized in that, The methods for determining whether the test voltage of the membrane electrode (200) is qualified include: When the voltage value of the membrane electrode (200) at the preset time point is greater than the first preset voltage value or less than the second preset voltage value, the test voltage of the membrane electrode (200) is determined to be unqualified. When the voltage value of the membrane electrode (200) at the preset time point is greater than or equal to the second preset voltage value and less than or equal to the first preset voltage value, the test voltage of the membrane electrode (200) is deemed to be qualified. Wherein, the first preset voltage value is greater than the second preset voltage value.

4. The detection method according to claim 3, characterized in that, The first preset voltage value ranges from 0.3V to 1.5V; the second preset voltage value ranges from 0.1V to 0.8V.

5. The detection method according to claim 1, characterized in that, The power supply component is powered by a preset current, which ranges from 0.01A to 5A.

6. A detection device for a fuel cell membrane electrode assembly, characterized in that, The detection device, applicable to any one of claims 1 to 5, comprises: Two electrode plates (50) are arranged opposite to each other, the two electrode plates (50) being an anode plate (10) and a cathode plate (20) respectively, and a clamping space for clamping a membrane electrode (200) is formed between the anode plate (10) and the cathode plate (20); The power supply component is electrically connected to both the anode plate (10) and the cathode plate (20) so that the power supply component supplies a constant current to the membrane electrode (200); The voltage detection component is electrically connected to both the anode plate (10) and the cathode plate (20) so that the voltage detection component can detect the voltage value of the membrane electrode (200).

7. The detection device according to claim 6, characterized in that, The detection device further includes a constant current power supply (30), which includes the power supply component and the voltage detection component.

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