CN218916721U - Electrode assembly and test equipment - Google Patents

Abstract

The utility model provides an electrode assembly and test equipment, wherein the electrode assembly comprises an electrode plate and a sealing gasket, a plurality of groove parts which are sequentially arranged along the peripheral direction of the edge of the electrode plate are arranged on a first plate surface of the electrode plate, any two adjacent groove parts are communicated, the groove parts are connected end to enclose a clamping lug, and the groove parts together enclose a middle lug; the electrode plate is provided with a channel, the second end of the channel extends to the surface of the middle lug, and the first end of the channel extends to the outer wall surface of the electrode plate; the sealing gasket is provided with a middle hole and a plurality of clamping holes, and the clamping holes are sequentially arranged around the middle hole along the circumferential direction of the middle hole; each clamping lug penetrates through the corresponding clamping hole; the middle protruding block is arranged in the middle hole in a penetrating way; the middle contact part of the membrane electrode is penetrated in the middle hole and contacted with the middle lug. The electrode assembly solves the problem that in the prior art, the detection efficiency of the air tightness and coating problems of the membrane electrode is low.

Description

Electrode assembly and test equipment

Technical Field

The utility model relates to the technical field of membrane electrode detection, in particular to an electrode assembly and testing equipment.

Background

Clean and efficient alternative energy sources have been widely studied in recent years due to energy shortage and environmental pollution problems. The proton exchange membrane fuel cell is an electrochemical energy converter for directly converting chemical energy in fuel into direct current, and has the advantages of high efficiency, low emission or zero emission, low cost, no moving parts and modularization compared with the traditional energy conversion technology.

The membrane electrode is the region where the electrochemical reaction occurs and is the core component of the whole fuel cell system; along with mass production and commercial application of fuel cells, membrane electrode quality detection technology is rapidly developed, wherein means such as physical method detection, helium mass spectrometer leak detector detection and infrared detection are adopted for membrane electrode air tightness detection, and constant current charging method detection, XRF detection and the like are adopted for detection of coating problems (double anode, double cathode, cathode-anode standard reaction, coating missing and the like).

The existing detection aiming at the problems of air tightness and coating of the membrane electrode respectively adopts two detection modes of separation, and cannot be carried out simultaneously, so that the detection is long in time consumption and low in efficiency.

Disclosure of Invention

The utility model mainly aims to provide an electrode assembly and test equipment, which are used for solving the problems of lower detection efficiency of the air tightness and coating of a membrane electrode in the prior art.

In order to achieve the above object, according to one aspect of the present utility model, there is provided an electrode assembly comprising: the electrode plate comprises a first plate surface and a second plate surface; a plurality of groove parts which are sequentially arranged along the peripheral direction of the edge of the first plate surface of the electrode plate are arranged on the first plate surface of the electrode plate, any two adjacent groove parts are communicated, the groove parts are connected end to form a clamping convex block, and the groove parts jointly form a middle convex block; the electrode plate is provided with a channel, the second end of the channel extends to the surface of the middle lug, and the first end of the channel extends to the outer wall surface of the electrode plate; the sealing gasket is provided with a middle hole and a plurality of clamping holes, and the clamping holes are sequentially arranged around the middle hole along the circumferential direction of the middle hole; the middle hole and each clamping hole penetrate through the sealing gasket along the thickness direction of the sealing gasket; the plurality of clamping holes are arranged in one-to-one correspondence with the plurality of clamping convex blocks, so that each clamping convex block penetrates through the corresponding clamping hole; the middle protruding block is arranged in the middle hole in a penetrating way; the middle contact part of the membrane electrode is penetrated into the middle hole, so that the middle lug is contacted with the middle contact part of the membrane electrode.

Further, each groove part is a polygonal groove, and any two adjacent groove parts of the electrode plate share one side edge.

Further, the electrode assembly further comprises a connecting plate connected with the electrode plate, at least part of the connecting plate is made of conductive materials, and conductive holes are formed in the connecting plate and are used for conducting connection with the positive electrode of the constant current source or the negative electrode of the constant current source.

Further, the electrode plate and the connecting plate are of an integrated structure; and/or the connecting plate is a strip-shaped plate, one end of the connecting plate is connected with the electrode plate, and the conducting hole is arranged at the other end of the connecting plate.

Further, the electrode assembly comprises an electrode piece, the electrode piece comprises an electrode plate and a connecting plate, the electrode piece is made of red copper material, and the surface of the electrode piece is plated with gold.

Further, the electrode assembly further includes an insulating plate connected to the electrode plate, and a plate surface of the insulating plate contacts with a second plate surface of the electrode plate.

Further, the electrode plate is provided with a first connecting hole, the insulating plate is provided with a second connecting hole, and the fastening piece is arranged in the first connecting hole and the second connecting hole in a penetrating mode, so that the electrode plate and the insulating plate are relatively fixed.

Further, a first positioning hole is formed in the electrode plate, a second positioning hole is formed in the insulating plate, and a third positioning hole is formed in the membrane electrode; the positioning pins penetrate through the second positioning holes, the first positioning holes and the third positioning holes so as to position the electrode assembly and the membrane electrode.

According to another aspect of the present utility model, there is provided a test apparatus comprising two of the above-described electrode assemblies, the two electrode assemblies being an anode assembly and a cathode assembly, respectively; the two electrode assemblies are movably disposed in a direction approaching or separating from each other to clamp or release the membrane electrode disposed between the two electrode assemblies; the electrode plate of the anode component is an anode plate, and the electrode plate of the cathode component is a cathode plate; the cathode plate is used for conducting connection with the positive electrode of the constant current source, and the anode plate is used for conducting connection with the negative electrode of the constant current source; the first port of the channel on the cathode plate is used for being connected and communicated with an air supply pipeline, and the first port of the channel on the anode plate is used for being connected and communicated with an air circuit of the flowmeter; or the first port of the channel on the anode plate is used for being connected and communicated with the air supply pipeline, and the first port of the channel on the cathode plate is used for being connected and communicated with the air circuit of the flowmeter.

Further, the test device further comprises a press, wherein the press comprises an upper plate and a lower plate which are distributed along the vertical direction, and the upper plate of the press is movably arranged along the vertical direction relative to the lower plate of the press; one of the two electrode assemblies is fixedly connected with the upper plate of the press, and the other electrode assembly is fixedly connected with the lower plate of the press; wherein, all be provided with the perforation that supplies the fastener to wear to establish on the upper plate and the lower plate of press.

By applying the technical scheme of the utility model, the electrode assembly comprises an electrode plate and a sealing gasket, wherein the two plate surfaces of the electrode plate are a first plate surface and a second plate surface respectively; a plurality of groove parts which are sequentially arranged along the peripheral direction of the edge of the first plate surface of the electrode plate are arranged on the first plate surface of the electrode plate, any two adjacent groove parts are communicated, the groove parts are connected end to form a clamping convex block, and the groove parts jointly form a middle convex block; the electrode plate is provided with a channel, the second end of the channel extends to the surface of the middle lug, and the first end of the channel extends to the outer wall surface of the electrode plate; the sealing gasket is provided with a middle hole and a plurality of clamping holes, and the clamping holes are sequentially arranged around the middle hole along the circumferential direction of the middle hole, namely the clamping holes are sequentially arranged along the circumferential edge of the sealing gasket; the middle hole and each clamping hole penetrate through the sealing gasket along the thickness direction of the sealing gasket, namely, the middle hole and each clamping hole penetrate through two plate surfaces of the sealing gasket; the thickness direction of the sealing gasket is the same as or parallel to the thickness direction of the electrode plate; the plurality of clamping holes of the sealing gasket are arranged in one-to-one correspondence with the plurality of clamping convex blocks of the electrode plate, so that each clamping convex block penetrates through the corresponding clamping hole; the middle protruding block is arranged in the middle hole in a penetrating way; namely, the sealing gaskets are arranged in the plurality of groove parts of the electrode plate; the membrane electrode is provided with a middle contact part, and the middle contact part of the membrane electrode is penetrated into the middle hole, so that the middle lug is contacted with the middle contact part of the membrane electrode, namely, the middle contact part and the middle lug are penetrated into the middle hole.

In the specific implementation process, two electrode assemblies are used, the two electrode assemblies are respectively arranged on two sides of the membrane electrode along the thickness direction of the membrane electrode, the membrane electrode is clamped between the two electrode assemblies, at the moment, the middle contact part of the membrane electrode is penetrated in the middle hole of the sealing gasket of the two electrode assemblies, and the middle protruding blocks of the two electrode plates are contacted with the middle contact part of the membrane electrode. The two electrode assemblies are an anode assembly and a cathode assembly respectively; the electrode plate of the anode component is an anode plate, and the electrode plate of the cathode component is a cathode plate; the sealing gasket of the anode assembly is an anode sealing gasket, and the sealing gasket of the cathode assembly is a cathode sealing gasket.

Constant-current charging is carried out on the membrane electrode for quick quality inspection: the positive electrode of the constant current source is electrically connected with the negative plate, and the negative electrode of the constant current source is electrically connected with the positive plate; then, the positive electrode clamp of the voltage collector clamps the negative plate, and the negative electrode clamp of the voltage collector clamps the positive plate; and (3) opening the constant current source to charge and discharge the membrane electrode, and judging whether the membrane electrode has quality problems, such as double anode, double cathode, negative and positive electrode standard, coating deficiency and the like by observing the charge and discharge rate.

Detecting the air tightness of the membrane electrode: connecting and communicating a first port of a channel on the cathode plate with an air supply pipeline, and connecting and communicating a first port of a channel on the anode plate with an air circuit of the flowmeter; and (3) inflating the channel on the cathode plate through the air supply pipeline, and keeping the inflation pressure at a set value unchanged, wherein the gas flow detected by the flowmeter is the gas flow of the membrane electrode. Or connecting and communicating the first port of the channel on the anode plate with the air supply pipeline, and connecting and communicating the first port of the channel on the cathode plate with the air circuit of the flowmeter; and (3) inflating the channel on the anode plate through the air supply pipeline, and keeping the inflation pressure at a set value unchanged, wherein the gas flow detected by the flowmeter is the gas flow of the membrane electrode.

Therefore, the electrode assembly can be used for simultaneously detecting the air tightness and quality inspection of the problems such as coating, quality inspection efficiency is greatly improved, and the problem that the detection efficiency of the air tightness and the coating of the membrane electrode is low in the prior art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows an exploded view of two electrode assemblies and a membrane electrode of a test apparatus according to the present utility model;

fig. 2 shows a schematic structural view of two electrode assemblies clamping membrane electrodes of a test apparatus according to the present utility model;

FIG. 3 shows a schematic structural view of the test apparatus of FIG. 2 from another perspective, in which two electrode assemblies clamp membrane electrodes;

fig. 4 is a schematic structural view showing an electrode member of an electrode assembly according to the present utility model;

fig. 5 illustrates a schematic structural view of an insulating plate of an electrode assembly according to the present utility model;

fig. 6 is a schematic view showing the structure of a sealing gasket of an electrode assembly according to the present utility model;

fig. 7 shows a schematic structural view of a membrane electrode according to the present utility model.

Wherein the above figures include the following reference numerals:

10. an electrode assembly; 101. an anode assembly; 102. a cathode assembly;

110. an electrode member; 11. an electrode plate; 111. a groove portion; 112. a clamping convex block; 113. a middle bump; 114. a first positioning hole; 116. a first connection hole; 117. a channel; 1171. a first port; 1172. a second port; 119. a connecting plate; 1191. a conductive hole;

12. an insulating plate; 121. a second connection hole; 122. a second positioning hole;

13. A sealing gasket; 131. a middle hole; 132. a clamping hole;

20. a membrane electrode; 21. an edge portion; 22. an intermediate contact portion; 23. a third positioning hole;

31. a first fastener; 32. a second fastener; 33. and (5) positioning pins.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. Unless defined otherwise, 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 belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The utility model provides an electrode assembly 10, please refer to fig. 1 to 7, the electrode assembly 10 comprises an electrode plate 11 and a sealing gasket 13, wherein two plate surfaces of the electrode plate 11 are a first plate surface and a second plate surface respectively; a plurality of groove parts 111 which are sequentially arranged along the peripheral direction of the edge of the first plate surface of the electrode plate 11 are arranged on the first plate surface of the electrode plate 11, any two adjacent groove parts 111 are communicated, the groove parts 111 are connected end to enclose a clamping convex block 112, and the groove parts 111 together enclose a middle convex block 113; the electrode plate 11 is provided with a channel 117, a second end of the channel 117 extends to the surface of the middle lug 113, and a first end of the channel 117 extends to the outer wall surface of the electrode plate 11; the sealing gasket 13 is provided with a middle hole 131 and a plurality of clamping holes 132, and the clamping holes 132 are sequentially arranged around the middle hole 131 along the circumferential direction of the middle hole 131, namely the clamping holes 132 are sequentially arranged along the circumferential edge of the sealing gasket 13; the middle hole 131 and each clamping hole 132 penetrate through the sealing gasket 13 along the thickness direction of the sealing gasket 13, namely, the middle hole 131 and each clamping hole 132 penetrate through two plate surfaces of the sealing gasket 13; the thickness direction of the sealing gasket 13 is the same as or parallel to the plate thickness direction of the electrode plate 11; wherein, the plurality of clamping holes 132 of the sealing gasket 13 are arranged in one-to-one correspondence with the plurality of clamping convex blocks 112 of the electrode plate 11, so that each clamping convex block 112 is penetrated in the corresponding clamping hole 132; the middle lug 113 is arranged in the middle hole 131 in a penetrating way; namely, the sealing gaskets 13 are provided in the plurality of groove portions 111 of the electrode plate 11; the membrane electrode 20 has a middle contact portion 22 to bring the middle bump 113 into contact with the middle contact portion 22 of the membrane electrode 20 when the middle contact portion 22 of the membrane electrode 20 passes through the middle hole 131, i.e., by threading the middle contact portion 22 of the membrane electrode 20 into the middle hole 131 to bring the middle bump 113 into contact with the middle contact portion 22 of the membrane electrode 20; i.e. the intermediate contact 22 and the intermediate bump 113 are both provided in the intermediate hole 131.

In the specific implementation process, two electrode assemblies 10 are used, the two electrode assemblies 10 are respectively arranged at two sides of the membrane electrode 20 along the thickness direction of the membrane electrode 20, the membrane electrode 20 is clamped between the two electrode assemblies 10, at this time, the middle contact part 22 of the membrane electrode 20 is penetrated into the middle hole 131 of the sealing gasket 13 of the two electrode assemblies 10, and the middle protruding blocks 113 of the two electrode plates 11 are contacted with the middle contact part 22 of the membrane electrode 20. The two electrode assemblies 10 are an anode assembly 101 and a cathode assembly 102, respectively; the electrode plate 11 of the anode assembly 101 is an anode plate, and the electrode plate 11 of the cathode assembly 102 is a cathode plate; the sealing gasket 13 of the anode assembly 101 is an anode sealing gasket, and the sealing gasket 13 of the cathode assembly 102 is a cathode sealing gasket.

Constant current charging and rapid quality inspection are carried out on the membrane electrode 20: the positive electrode of the constant current source is electrically connected with the negative plate, and the negative electrode of the constant current source is electrically connected with the positive plate; then, the positive electrode clamp of the voltage collector clamps the negative plate, and the negative electrode clamp of the voltage collector clamps the positive plate; the constant current source is turned on to charge and discharge the membrane electrode 20, and whether the membrane electrode 20 has quality problems, such as double anode, double cathode, negative and positive electrode standard, coating missing and the like is judged by observing the charge and discharge rate.

The airtightness of the membrane electrode 20 was detected: connecting and communicating the first port of the channel 117 on the cathode plate with the gas supply line and the first port of the channel 117 on the anode plate with the gas path of the flow meter; the gas is supplied through the gas supply line to the channel 117 in the cathode plate and the pressure of the gas is maintained at a constant value, where the flow rate of the gas detected by the flow meter is the amount of the gas flowing through the membrane electrode 20. Alternatively, the first port of the channel 117 on the anode plate is connected and communicated with the gas supply line, and the first port of the channel 117 on the cathode plate is connected and communicated with the gas path of the flowmeter; the channel 117 on the anode plate is inflated through the air supply line, and the inflation pressure is kept at a set value, and at this time, the flow rate of the gas detected by the flow meter is the amount of the cross flow of the membrane electrode 20. By arranging the sealing gasket 13, the accuracy of the air tightness detection of the membrane electrode 20 is guaranteed. Fig. 4 shows a first port 1171 and a second port 1172 of the channel 117.

It should be noted that, in theory, the gas cannot pass through the membrane electrode 20, so that one side of the membrane electrode 20 is inflated, and the other side does not collect the gas; if there is gas on the other side of the membrane electrode 20, the amount of gas on the other side of the membrane electrode 20 is the amount of cross gas of the membrane electrode 20.

The intermediate contact portion 22 of the membrane electrode 20 has an anode side and a cathode side in the thickness direction of the membrane electrode 20; when the intermediate contact portion 22 is not compressed, the anode side and the cathode side of the intermediate contact portion 22 are in a non-contact disconnected state; the intermediate contact 22 needs to be compressed so that the anode side and the cathode side of the intermediate contact 22 are in contact, thereby bringing the anode side and the cathode side of the intermediate contact 22 into conductive communication; after the pressure applied to the intermediate contact portion 22 is removed, the intermediate contact portion 22 expands to resume the disconnected state where the anode side and the cathode side are not in contact. The two electrode assemblies 10 serve to clamp the intermediate contact 22 to compress the intermediate contact 22.

Therefore, the electrode assembly 10 can be used for simultaneously detecting the air tightness and quality inspection of the problems such as coating, so that the quality inspection efficiency is greatly improved, and the problem of lower detection efficiency of the air tightness and the coating problems of the membrane electrode in the prior art is solved.

Specifically, when the indication of the flowmeter is smaller than the preset flow rate, the air tightness of the membrane electrode 20 is judged to be qualified; when the indication of the flowmeter is greater than or equal to the preset flow rate, it is determined that the airtightness of the membrane electrode 20 is not acceptable.

Specifically, the plate thickness direction of the electrode plate 11 is the same as or parallel to the thickness direction of the membrane electrode 20.

Alternatively, the inflation pressure for inflating the channel 117 via the air supply line is 50KPa.

Specifically, the thickness of the sealing gasket 13 is greater than the protruding height of each of the snap-fit projections 112 and greater than the protruding height of the middle projection 113.

Specifically, the membrane electrode 20 further has an edge portion 21, and the edge portion 21 is disposed around the intermediate contact portion 22, and the thickness of the intermediate contact portion 22 of the membrane electrode 20 is greater than the thickness of the edge portion 21 of the membrane electrode 20.

Specifically, the edge portion 21 of the membrane electrode 20 contacts the edge portion of the sealing gasket 13 where the plurality of engagement holes 132 are located.

In the specific implementation process, a transparent adhesive tape or glue can be used to adhere the anode sealing gasket to the groove wall of at least part of the groove 111 of the anode plate; the cathode sealing gasket may be attached to the groove wall of at least part of the groove portion 111 of the cathode plate using a transparent adhesive tape or glue.

In this embodiment, each groove portion 111 is a polygonal groove, and any two adjacent groove portions 111 share one side, that is, in any two adjacent groove portions 111, one side of one groove portion 111 is one side of the other groove portion 111, so that the two adjacent groove portions 111 communicate.

Specifically, at least part of the groove portions 111 of the plurality of groove portions 111 is a quadrangular groove.

Specifically, the first panel includes two designated sides disposed opposite to each other, the plurality of groove portions 111 includes two groove units, and each groove unit includes the plurality of groove portions 111; the two groove units are arranged in one-to-one correspondence with the two designated sides, and the plurality of groove parts 111 of each groove unit are sequentially arranged along the length direction of the corresponding designated side; the plurality of groove portions 111 of each groove unit are rectangular grooves.

In this embodiment, the electrode assembly 10 further includes a connection plate 119 connected to the electrode plate 11, and a conductive hole 1191 is provided in the connection plate 119, and the conductive hole 1191 is used for conductive connection with the positive electrode of the constant current source or the negative electrode of the constant current source. At least a portion of the web 119 is made of an electrically conductive material such that the web 119 is electrically conductive and such that the web 119 is electrically conductive.

Specifically, the electrode plate 11 and the connection plate 119 are an integrally formed structure.

Specifically, the electrode plate 11 and the connection plate 119 constitute the electrode assembly 110, i.e., the electrode assembly 110 includes the electrode plate 11 and the connection plate 119.

Alternatively, the plate surface of the connection plate 119 is parallel to or on the same plane as the plate surface of the electrode plate 11.

Optionally, conductive holes 1191 extend through both faces of the web 119.

Optionally, the web 119 is a strip; one end of the connection plate 119 is connected to the electrode plate 11, and a conductive hole 1191 is provided at the other end of the connection plate 119.

Specifically, the electrode member 110 is made of red copper material, and the surface of the electrode member 110 is gold-plated to enhance the electrical conductivity of the electrode member 110 and to make the electrode member 110 rust-proof.

In this embodiment, the electrode assembly 10 further includes an insulating plate 12 connected to the electrode plate 11, and the plate surface of the insulating plate 12 contacts the second plate surface of the electrode plate 11.

Specifically, the electrode plate 11 is provided with a first connection hole 116, the insulating plate 12 is provided with a second connection hole 121, and the fastening members are inserted into the first connection hole 116 and the second connection hole 121 to fix the electrode plate 11 and the insulating plate 12 relatively.

Specifically, the electrode plate 11 is provided with a first positioning hole 114, the insulating plate 12 is provided with a second positioning hole 122, and the membrane electrode 20 is provided with a third positioning hole 23; the electrode assembly 10 and the membrane electrode 20 are positioned by penetrating the positioning pins 33 into the second positioning holes 122, the first positioning holes 114, and the third positioning holes 23.

Specifically, the thickness direction of the insulating plate 12 is the same as or parallel to the thickness direction of the electrode plate 11.

Specifically, one plate surface of the insulating plate 12 is bonded to the second plate surface of the electrode plate 11.

Specifically, the insulating plate 12 is made of a glass fiber epoxy resin material so that the insulating plate 12 has good insulating properties.

The utility model also provides a testing device, as shown in fig. 1 to 7, the testing device comprises two electrode assemblies 10, wherein the two electrode assemblies 10 are an anode assembly 101 and a cathode assembly 102 respectively; the two electrode assemblies 10 are movably disposed in a direction approaching or separating from each other to clamp or release the membrane electrode 20 disposed between the two electrode assemblies 10.

The electrode plate 11 of the anode assembly 101 is an anode plate, and the electrode plate 11 of the cathode assembly 102 is a cathode plate; the cathode plate is used for being connected with the positive pole of the constant current source in a conductive way, and the anode plate is used for being connected with the negative pole of the constant current source in a conductive way. The first port of the channel 117 on the cathode plate is used for being connected and communicated with an air supply pipeline, and the first port of the channel 117 on the anode plate is used for being connected and communicated with an air path of the flowmeter; alternatively, the first port of the channel 117 on the anode plate is adapted to be connected to and communicate with the gas supply line and the first port of the channel 117 on the cathode plate is adapted to be connected to and communicate with the gas path of the flow meter.

In this embodiment, the test apparatus further includes a press including an upper plate and a lower plate distributed in a vertical direction, the upper plate of the press being movably disposed in the vertical direction with respect to the lower plate of the press; one electrode assembly 10 of the two electrode assemblies 10 is fixedly connected with the upper plate of the press, and the other electrode assembly 10 is fixedly connected with the lower plate of the press, so that the upper plate of the press drives the electrode assembly 10 connected with the upper plate of the press to approach or separate from the other electrode assembly 10 connected with the lower plate of the press in the vertical direction.

Specifically, the upper plate of the press is connected with the output shaft of the driving cylinder, and the output shaft of the driving cylinder stretches up and down along the vertical direction, so that the output shaft of the driving cylinder drives the upper plate of the press to move along the vertical direction. Wherein, the driving cylinder generally uses compressed air or nitrogen.

Specifically, the lower plate of the press is placed on a table.

Specifically, the first mating manner of the two electrode assemblies 10 with the press is: the cathode assembly 102 is fixedly connected to the upper plate of the press and the anode assembly 101 is fixedly connected to the lower plate of the press. In the implementation process, before the press is not started, the cathode assembly 102 and the anode assembly 101 are in a separated state; starting a press, enabling an upper plate of the press to vertically move downwards so as to drive the cathode assembly 102 to approach the anode assembly 101, and compacting the cathode assembly 102 and the anode assembly 101 under the compaction effect of the press; after the test is completed, the cathode assembly 102 is driven away from the anode assembly 101 by moving the upper plate of the press vertically upward, i.e., lifting the cathode assembly 102.

The second way of mating the two electrode assemblies 10 with the press is: the anode assembly 101 is fixedly connected with the upper plate of the press, and the cathode assembly 102 is fixedly connected with the lower plate of the press. In the implementation process, before the press is not started, the cathode assembly 102 and the anode assembly 101 are in a separated state; starting a press, enabling an upper plate of the press to vertically move downwards so as to drive the anode assembly 101 to approach the cathode assembly 102, and compacting the anode assembly 101 and the cathode assembly 102 under the compaction effect of the press; after the test is completed, the anode assembly 101 is driven away from the cathode assembly 102 by moving the upper plate of the press vertically upward, i.e., lifting the anode assembly 101.

Alternatively, the driving cylinder pressure compressing the anode assembly 101 and the cathode assembly 102 is about 8bar.

In the present embodiment, since both the upper and lower plates of the press are stainless steel materials, the insulating plate 12 is disposed between the electrode plate 11 and the upper or lower plate of the press.

Specifically, the insulating plate 12 of the anode assembly 101 is an anode insulating plate, and the insulating plate 12 of the cathode assembly 102 is a cathode insulating plate; the anode insulating plate is arranged between the anode plate and the lower plate of the press and insulates the anode plate from the lower plate of the press; the cathode insulating plate is disposed between the cathode plate and the upper plate of the press, and insulates the cathode plate from the upper plate of the press. Alternatively, an anode insulating plate is provided between the anode plate and the upper plate of the press, the anode insulating plate insulating the anode plate from the upper plate of the press; the cathode insulating plate is disposed between the cathode plate and the lower plate of the press, and insulates the cathode plate from the lower plate of the press.

Because the constant current charging method has higher requirements on the compression rate of the membrane electrode 20, the testing equipment can adjust the compression degree by adjusting the compression force (namely the pressure of a driving cylinder) of the upper plate of the press, the thickness of the anode sealing gasket and the thickness of the cathode sealing gasket, so that the compression rate of the membrane electrode 20 is optimal. The compression ratio of the membrane electrode 20 is the ratio of the compression amount of the membrane electrode 20 to the thickness before the membrane electrode 20 is compressed, and the compression amount of the membrane electrode 20 is the difference between the thickness before the membrane electrode 20 is compressed and the thickness after the membrane electrode 20 is compressed.

Specifically, the upper plate and the lower plate of the press are provided with penetrating holes for the fasteners to penetrate.

When two electrode assemblies 10 are in a first mating manner with a press: the first fastening piece 31 is arranged in the penetrating hole on the lower plate of the press, the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode plate in a penetrating way, namely, the first fastening piece 31 is arranged in the penetrating hole on the lower plate of the press, the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode plate in a penetrating way, so that the anode plate, the anode insulating plate and the lower plate of the press are fixed, and the anode assembly 101 and the lower plate of the press are fixedly connected. The second fastening piece 32 is arranged in the penetrating hole on the upper plate of the press, the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode plate in a penetrating way, namely, the second fastening piece 32 is arranged in the penetrating hole on the upper plate of the press, the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode plate in a penetrating way, so that the cathode plate, the cathode insulating plate and the upper plate of the press are fixed, and the cathode assembly 102 and the upper plate of the press are fixedly connected.

When two electrode assemblies 10 are in the second mating mode with the press: the first fastening piece 31 is arranged in the penetrating hole on the upper plate of the press, the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode plate in a penetrating way, namely, the first fastening piece 31 is arranged in the penetrating hole on the upper plate of the press, the second connecting hole 121 of the anode insulating plate and the first connecting hole 116 of the anode plate in a penetrating way, so that the anode plate, the anode insulating plate and the upper plate of the press are fixed, and the anode assembly 101 and the upper plate of the press are fixedly connected. The second fastening piece 32 is arranged in the penetrating hole on the lower plate of the press, the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode plate in a penetrating way, namely, the second fastening piece 32 is arranged in the penetrating hole on the lower plate of the press, the second connecting hole 121 of the cathode insulating plate and the first connecting hole 116 of the cathode plate in a penetrating way, so that the cathode plate, the cathode insulating plate and the lower plate of the press are fixed, and the cathode assembly 102 and the lower plate of the press are fixedly connected.

Since the upper plate and the lower plate of the press are made of stainless steel, the first fastener 31 and the second fastener 32 are sleeved with insulating bushings. When the two electrode assemblies 10 are mated with the press in the first mating manner, the insulating bushing on the first fastener 31 insulates the anode plate from the lower plate of the press and the insulating bushing on the second fastener 32 insulates the cathode insulating plate from the upper plate of the press. When the two electrode assemblies 10 are mated with the press in the second mating manner, the insulating bushing on the first fastener 31 insulates the anode plate from the upper plate of the press and the insulating bushing on the second fastener 32 insulates the cathode insulating plate from the lower plate of the press.

Alternatively, the first fastener 31 is a bolt or a screw, and the second fastener 32 is a bolt or a screw.

Specifically, the anode plate is provided with a plurality of first connecting holes 116, the anode insulating plate is provided with a plurality of second connecting holes 121, and the first fasteners 31 are a plurality of; the first fasteners 31 are arranged in one-to-one correspondence with the first connecting holes 116 on the anode plate, the first fasteners 31 are arranged in one-to-one correspondence with the second connecting holes 121 on the anode insulating plate, and the first connecting holes 116 on the anode plate are arranged in one-to-one correspondence with the second connecting holes 121 on the anode insulating plate; each first fastener 31 is inserted into a corresponding second connection hole 121 on the anode insulating plate and a corresponding first connection hole 116 on the anode plate.

Specifically, the cathode plate is provided with a plurality of first connecting holes 116, the cathode insulating plate is provided with a plurality of second connecting holes 121, and the second fastening members 32 are a plurality of; the plurality of second fasteners 32 are arranged in one-to-one correspondence with the plurality of first connecting holes 116 on the cathode plate, the plurality of second fasteners 32 are arranged in one-to-one correspondence with the plurality of second connecting holes 121 on the cathode insulating plate, and the plurality of first connecting holes 116 on the cathode plate are arranged in one-to-one correspondence with the plurality of second connecting holes 121 on the cathode insulating plate; each second fastener 32 is threaded into a corresponding second connection hole 121 on the cathode insulator plate and a corresponding first connection hole 116 on the cathode plate.

Specifically, a plurality of through holes are formed in an upper plate of the press, and a plurality of through holes are formed in a lower plate of the press. When the two electrode assemblies 10 and the press adopt the first matching mode, a plurality of penetrating holes on the lower plate of the press are arranged in one-to-one correspondence with a plurality of first fasteners 31, and a plurality of penetrating holes on the upper plate of the press are arranged in one-to-one correspondence with a plurality of second fasteners 32; when the two electrode assemblies 10 and the press adopt the second matching mode, the plurality of penetrating holes on the upper plate of the press are arranged in one-to-one correspondence with the plurality of first fasteners 31, and the plurality of penetrating holes on the lower plate of the press are arranged in one-to-one correspondence with the plurality of second fasteners 32.

Specifically, on each of the electrode plates 11, the first connection holes 116 are located on a side of the plurality of groove portions 111 away from the middle projection 113, that is, the plurality of first connection holes 116 are located on a side of the plurality of groove portions 111 away from the middle projection 113, and the plurality of first connection holes 116 are disposed at intervals along the edge circumference of the electrode plate 11.

In this embodiment, the positioning pins 33 are inserted into the second positioning holes 122, 114, 23, 114, and 122 of the anode, cathode, anode, membrane, 20, and cathode insulating plates, that is, the positioning pins 33 are inserted into the second positioning holes 122, 114, 23, 114, and 122 of the anode, membrane, 20, and cathode insulating plates to precisely position the anode, membrane, cathode, and cathode insulating plates.

In the specific implementation process, when the two electrode assemblies 10 and the press adopt the first matching mode, before the press is not started, the cathode assembly 102 and the anode assembly 101 are in a separated state, and the positioning pins 33 are firstly inserted into the second positioning holes 122 of the anode insulating plate and the first positioning holes 114 of the anode plate; then the anode sealing gasket is stuck on the anode plate, namely a plurality of clamping convex blocks 112 of the anode plate are correspondingly penetrated into a plurality of clamping holes 132 of the anode sealing gasket one by one, so that a middle convex block 113 of the anode plate is penetrated into a middle hole 131 of the anode sealing gasket; then the membrane electrode 20 is placed on the anode sealing gasket, the positioning pin 33 is penetrated into the third positioning hole 23 of the membrane electrode 20, at this time, the positioning pin 33 is penetrated into the second positioning hole 122 of the anode insulating plate, the first positioning hole 114 of the anode plate and the third positioning hole 23 of the membrane electrode 20, the middle contact part 22 of the membrane electrode 20 and the middle convex block 113 of the anode plate are penetrated into the middle hole 131 of the anode sealing gasket, and the edge part 21 of the membrane electrode 20 is contacted with the edge parts where the plurality of clamping holes 132 of the anode sealing gasket are positioned; then the cathode sealing gasket is stuck on the cathode plate, namely, the middle protruding blocks 113 of the cathode plate penetrate through the middle holes 131 of the cathode sealing gasket, and the clamping protruding blocks 112 of the cathode plate penetrate through the clamping holes 132 of the cathode sealing gasket in a one-to-one correspondence manner; after the cathode assembly 102 and the anode assembly 101 are pressed, the middle contact portion 22 of the membrane electrode 20 is inserted into the middle hole 131 of the cathode sealing gasket, the edge portion 21 of the membrane electrode 20 is contacted with the edge portions where the plurality of clamping holes 132 of the cathode sealing gasket are located, and at this time, the positioning pins 33 are inserted into the second positioning holes 122 of the anode insulating plate, the first positioning holes 114 of the anode plate, the third positioning holes 23 of the membrane electrode 20, the first positioning holes 114 of the cathode plate and the second positioning holes 122 of the cathode insulating plate.

In the specific implementation process, when the two electrode assemblies 10 and the press adopt the second matching mode, before the press is not started, the cathode assembly 102 and the anode assembly 101 are in a separated state, and the positioning pins 33 are firstly inserted into the second positioning holes 122 of the cathode insulating plate and the first positioning holes 114 of the cathode plate; then the cathode sealing gasket is stuck on the cathode plate, namely a plurality of clamping convex blocks 112 of the cathode plate are correspondingly penetrated into a plurality of clamping holes 132 of the cathode sealing gasket one by one, so that the middle convex blocks 113 of the cathode plate are penetrated into the middle holes 131 of the cathode sealing gasket; then the membrane electrode 20 is placed on the cathode sealing gasket plate, the positioning pin 33 is penetrated into the third positioning hole 23 of the membrane electrode 20, at this time, the positioning pin 33 is penetrated into the second positioning hole 122 of the cathode insulating plate, the first positioning hole 114 of the cathode plate and the third positioning hole 23 of the membrane electrode 20, the middle contact part 22 of the membrane electrode 20 and the middle convex block 113 of the cathode plate are penetrated into the middle hole 131 of the cathode sealing gasket, and the edge part 21 of the membrane electrode 20 is contacted with the edge parts where the plurality of clamping holes 132 of the cathode sealing gasket are positioned; then the anode sealing gasket is stuck on the anode plate, even if the middle convex block 113 of the anode plate is penetrated into the middle hole 131 of the anode sealing gasket, the plurality of clamping convex blocks 112 of the anode plate are penetrated into the plurality of clamping holes 132 of the anode sealing gasket in a one-to-one correspondence manner; after the anode assembly 101 and the cathode assembly 102 are pressed, the middle contact portion 22 of the membrane electrode 20 is inserted into the middle hole 131 of the anode sealing gasket, the edge portion 21 of the membrane electrode 20 is contacted with the edge portions where the plurality of clamping holes 132 of the anode sealing gasket are located, and at this time, the positioning pins 33 are inserted into the second positioning holes 122 of the cathode insulating plate, the first positioning holes 114 of the cathode plate, the third positioning holes 23 of the membrane electrode 20, the first positioning holes 114 of the anode plate and the second positioning holes 122 of the anode insulating plate.

Specifically, each electrode plate 11 is provided with a plurality of first positioning holes 114, each insulating plate 12 is provided with a plurality of second positioning holes 122, each membrane electrode 20 is provided with a plurality of third positioning holes 23, and the positioning pins 33 are a plurality of; the positioning pins 33 are arranged in one-to-one correspondence with the first positioning holes 114 on the anode plate, the positioning pins 33 are arranged in one-to-one correspondence with the second positioning holes 122 on the anode insulating plate, the positioning pins 33 are arranged in one-to-one correspondence with the third positioning holes 23 on the membrane electrode 20, the positioning pins 33 are arranged in one-to-one correspondence with the first positioning holes 114 on the cathode plate, and the positioning pins 33 are arranged in one-to-one correspondence with the second positioning holes 122 on the cathode insulating plate; each positioning pin 33 is inserted into a corresponding second positioning hole 122 of the anode insulating plate, a corresponding first positioning hole 114 of the anode plate, a corresponding third positioning hole 23 of the membrane electrode 20, a corresponding first positioning hole 114 of the cathode plate, and a corresponding second positioning hole 122 of the cathode insulating plate.

Specifically, on each electrode plate 11, the first positioning holes 114 are located on the side of the plurality of groove portions 111 away from the middle projection 113, that is, the plurality of first positioning holes 114 are located on the side of the plurality of groove portions 111 away from the middle projection 113, and the plurality of first positioning holes 114 are arranged at intervals along the edge circumference of the electrode plate 11. The third positioning holes 23 are disposed at the edge portion of the membrane electrode 20, that is, the plurality of third positioning holes 23 are disposed at the edge portion of the membrane electrode 20 and are disposed at intervals along the circumferential direction of the edge of the membrane electrode 20.

In the present embodiment, the electrode member 110 including the cathode plate and the connection plate 119 is a cathode member, and the electrode member 110 including the anode plate and the connection plate 119 is an anode member. The conductive hole 1191 of the cathode member is used for being connected with the positive electrode of the constant current source, and the conductive hole 1191 of the anode member is used for being connected with the negative electrode of the constant current source.

In the specific implementation process, the positive electrode of the constant current source is connected with the cathode piece through the conductive hole 1191 of the cathode piece so as to be in conductive connection with the cathode piece; the negative electrode of the constant current source is connected to the anode member through the conductive hole 1191 of the anode member so that the negative electrode of the constant current source is electrically connected to the anode member.

Specifically, the test apparatus further includes a first locking member, where the first locking member is disposed in the conductive hole 1191 of the cathode member in a penetrating manner; the first locking piece is in conductive connection with the positive electrode of the constant current source, so that the cathode piece is in conductive connection with the positive electrode of the constant current source through the first locking piece; or, the positive electrode of the constant current source is clamped between the first locking member and the hole wall of the conductive hole 1191 of the cathode member, so that the positive electrode of the constant current source is in contact with the hole wall of the conductive hole 1191 of the cathode member for conduction. Optionally, the first locking member is a bolt.

Specifically, the test apparatus further includes a second locking member, where the second locking member is disposed through the conductive hole 1191 of the anode member; the second locking piece is in conductive connection with the negative electrode of the constant current source, so that the anode piece is in conductive connection with the negative electrode of the constant current source through the second locking piece; or, the constant current source negative electrode is clamped between the second locking member and the hole wall of the conductive hole 1191 of the anode member, so that the constant current source negative electrode is in contact with the hole wall of the conductive hole 1191 of the anode member for conduction. Optionally, the second locking member is a bolt.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

in the electrode assembly 10 provided by the utility model, the electrode assembly 10 comprises an electrode plate 11 and a sealing gasket 13, wherein two plate surfaces of the electrode plate 11 are respectively a first plate surface and a second plate surface; a plurality of groove parts 111 which are sequentially arranged along the peripheral direction of the edge of the first plate surface of the electrode plate 11 are arranged on the first plate surface of the electrode plate 11, any two adjacent groove parts 111 are communicated, the groove parts 111 are connected end to enclose a clamping convex block 112, and the groove parts 111 together enclose a middle convex block 113; the electrode plate 11 is provided with a channel 117, a second end of the channel 117 extends to the surface of the middle lug 113, and a first end of the channel 117 extends to the outer wall surface of the electrode plate 11; the sealing gasket 13 is provided with a middle hole 131 and a plurality of clamping holes 132, and the clamping holes 132 are sequentially arranged around the middle hole 131 along the circumferential direction of the middle hole 131, namely the clamping holes 132 are sequentially arranged along the circumferential edge of the sealing gasket 13; the middle hole 131 and each clamping hole 132 penetrate through the sealing gasket 13 along the thickness direction of the sealing gasket 13, namely, the middle hole 131 and each clamping hole 132 penetrate through two plate surfaces of the sealing gasket 13; the thickness direction of the sealing gasket 13 is the same as or parallel to the plate thickness direction of the electrode plate 11; wherein, the plurality of clamping holes 132 of the sealing gasket 13 are arranged in one-to-one correspondence with the plurality of clamping convex blocks 112 of the electrode plate 11, so that each clamping convex block 112 is penetrated in the corresponding clamping hole 132; the middle lug 113 is arranged in the middle hole 131 in a penetrating way; namely, the sealing gaskets 13 are provided in the plurality of groove portions 111 of the electrode plate 11; the membrane electrode 20 has a middle contact portion 22 to bring the middle bump 113 into contact with the middle contact portion 22 of the membrane electrode 20 when the middle contact portion 22 of the membrane electrode 20 passes through the middle hole 131, i.e., by threading the middle contact portion 22 of the membrane electrode 20 into the middle hole 131 to bring the middle bump 113 into contact with the middle contact portion 22 of the membrane electrode 20; i.e. the intermediate contact 22 and the intermediate bump 113 are both provided in the intermediate hole 131.

In the specific implementation process, two electrode assemblies 10 are used, the two electrode assemblies 10 are respectively arranged at two sides of the membrane electrode 20 along the thickness direction of the membrane electrode 20, the membrane electrode 20 is clamped between the two electrode assemblies 10, at this time, the middle contact part 22 of the membrane electrode 20 is penetrated into the middle hole 131 of the sealing gasket 13 of the two electrode assemblies 10, and the middle protruding blocks 113 of the two electrode plates 11 are contacted with the middle contact part 22 of the membrane electrode 20. The two electrode assemblies 10 are an anode assembly 101 and a cathode assembly 102, respectively; the electrode plate 11 of the anode assembly 101 is an anode plate, and the electrode plate 11 of the cathode assembly 102 is a cathode plate; the sealing gasket 13 of the anode assembly 101 is an anode sealing gasket, and the sealing gasket 13 of the cathode assembly 102 is a cathode sealing gasket.

Constant current charging and rapid quality inspection are carried out on the membrane electrode 20: the positive electrode of the constant current source is electrically connected with the negative plate, and the negative electrode of the constant current source is electrically connected with the positive plate; then, the positive electrode clamp of the voltage collector clamps the negative plate, and the negative electrode clamp of the voltage collector clamps the positive plate; the constant current source is turned on to charge and discharge the membrane electrode 20, and whether the membrane electrode 20 has quality problems, such as double anode, double cathode, negative and positive electrode standard, coating missing and the like is judged by observing the charge and discharge rate.

The airtightness of the membrane electrode 20 was detected: connecting and communicating the first port of the channel 117 on the cathode plate with the gas supply line and the first port of the channel 117 on the anode plate with the gas path of the flow meter; the gas is supplied through the gas supply line to the channel 117 in the cathode plate and the pressure of the gas is maintained at a constant value, where the flow rate of the gas detected by the flow meter is the amount of the gas flowing through the membrane electrode 20. Alternatively, the first port of the channel 117 on the anode plate is connected and communicated with the gas supply line, and the first port of the channel 117 on the cathode plate is connected and communicated with the gas path of the flowmeter; the channel 117 on the anode plate is inflated through the air supply line, and the inflation pressure is kept at a set value, and at this time, the flow rate of the gas detected by the flow meter is the amount of the cross flow of the membrane electrode 20.

Therefore, the electrode assembly 10 can be used for simultaneously detecting the air tightness and quality inspection of the problems such as coating, so that the quality inspection efficiency is greatly improved, and the problem of lower detection efficiency of the air tightness and the coating problems of the membrane electrode in the prior art is solved.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. An electrode assembly, comprising:

the electrode plate (11), two faces of the electrode plate (11) are a first face and a second face respectively; a plurality of groove parts (111) which are sequentially arranged along the peripheral direction of the edge of the first plate surface of the electrode plate (11) are arranged on the first plate surface of the electrode plate, any two adjacent groove parts (111) are communicated, the groove parts (111) are connected end to enclose a clamping lug (112), and the groove parts (111) together enclose a middle lug (113); the electrode plate (11) is provided with a channel (117), the second end of the channel (117) extends to the surface of the middle lug (113), and the first end of the channel (117) extends to the outer wall surface of the electrode plate (11);

the sealing gasket (13), the sealing gasket (13) is provided with a middle hole (131) and a plurality of clamping holes (132), and the clamping holes (132) are sequentially arranged around the middle hole (131) along the circumferential direction of the middle hole (131); the middle hole (131) and each clamping hole (132) penetrate through the sealing gasket (13) along the thickness direction of the sealing gasket (13);

the clamping holes (132) are arranged in one-to-one correspondence with the clamping convex blocks (112) so that each clamping convex block (112) is penetrated in the corresponding clamping hole (132); the middle lug (113) is arranged in the middle hole (131) in a penetrating way;

The middle lug (113) is contacted with the middle contact part (22) of the membrane electrode (20) by penetrating the middle contact part (22) of the membrane electrode (20) into the middle hole (131).

2. The electrode assembly according to claim 1, wherein each of the groove portions (111) is a polygonal groove, and any adjacent two of the groove portions (111) of the electrode plate (11) share one side.

3. The electrode assembly according to claim 1, further comprising a connection plate (119) connected to the electrode plate (11), at least part of the connection plate (119) being made of an electrically conductive material, the connection plate (119) being provided with an electrically conductive hole (1191), the electrically conductive hole (1191) being for electrically conductive connection with a positive or negative constant current source electrode.

4. The electrode assembly of claim 3, wherein the electrode assembly comprises,

the electrode plate (11) and the connecting plate (119) are of an integrated structure; and/or

The connecting plate (119) is a strip-shaped plate, one end of the connecting plate (119) is connected with the electrode plate (11), and the conductive hole (1191) is formed in the other end of the connecting plate (119).

5. An electrode assembly according to claim 3, characterized in that the electrode assembly comprises an electrode member (110), the electrode member (110) comprising the electrode plate (11) and the connection plate (119), the electrode member (110) being made of a red copper material, and the surface of the electrode member (110) being gold-plated.

6. The electrode assembly according to claim 1, further comprising an insulating plate (12) connected to the electrode plate (11), wherein a plate surface of the insulating plate (12) is in contact with a second plate surface of the electrode plate (11).

7. The electrode assembly according to claim 6, wherein the electrode plate (11) is provided with a first connection hole (116), the insulating plate (12) is provided with a second connection hole (121), and fasteners are inserted into the first connection hole (116) and the second connection hole (121) to fix the electrode plate (11) and the insulating plate (12) relatively.

8. The electrode assembly according to claim 6, wherein the electrode plate (11) is provided with a first positioning hole (114), the insulating plate (12) is provided with a second positioning hole (122), and the membrane electrode (20) is provided with a third positioning hole (23); positioning pins (33) are arranged in the second positioning holes (122), the first positioning holes (114) and the third positioning holes (23) in a penetrating way so as to position the electrode assembly and the membrane electrode (20).

9. A test apparatus comprising two electrode assemblies according to any one of claims 1 to 8, the two electrode assemblies being an anode assembly (101) and a cathode assembly (102), respectively; the two electrode assemblies are movably disposed in a direction approaching or separating from each other to clamp or release a membrane electrode (20) disposed between the two electrode assemblies;

The electrode plate (11) of the anode assembly (101) is an anode plate, and the electrode plate (11) of the cathode assembly (102) is a cathode plate; the cathode plate is used for being in conductive connection with the positive electrode of the constant current source, and the anode plate is used for being in conductive connection with the negative electrode of the constant current source;

the first port of the channel (117) on the cathode plate is used for being connected and communicated with a gas supply pipeline, and the first port of the channel (117) on the anode plate is used for being connected and communicated with a gas circuit of the flowmeter; or the first port of the channel (117) on the anode plate is used for being connected and communicated with a gas supply pipeline, and the first port of the channel (117) on the cathode plate is used for being connected and communicated with a gas circuit of the flowmeter.

10. The test apparatus of claim 9, further comprising a press including upper and lower plates distributed in a vertical direction, the upper plate of the press being movably disposed in a vertical direction relative to the lower plate of the press; one of the two electrode assemblies is fixedly connected with the upper plate of the press, and the other electrode assembly is fixedly connected with the lower plate of the press; wherein, all be provided with the perforation that supplies the fastener to wear to establish on the upper plate and the lower plate of press.

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