CN212459502U

CN212459502U - Vertical electrochemical measuring cell for simulating in-situ test of fuel cell

Info

Publication number: CN212459502U
Application number: CN202020626457.4U
Authority: CN
Inventors: 张存满; 上官子轩; 李冰
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-02-02
Anticipated expiration: 2030-04-23

Abstract

The utility model relates to a vertical electrochemical measuring cell for simulating in-situ test of a fuel cell, which comprises an electrolytic cell body, an electrolytic cell cover, a clamping assembly, a sealing assembly and a pressurizing assembly, wherein the electrolytic cell cover is provided with a test window, an electrolytic cell gas escape outlet and an electrolyte adding reserved port, a reference electrode, a counter electrode and a reducing gas conduit are arranged in the electrolytic cell body, the clamping assembly is of a two-piece structure and is used for clamping a test sample, the clamping assembly is arranged in the test window, the bottom surface of the clamping assembly is provided with a notch through which electrolyte can penetrate and contact with a test sample, the sealing assembly is provided with a working electrode, the sealing assembly is arranged on the clamping assembly, the working electrode is in contact with the top surface of the clamping assembly, the sealing assembly is provided with an oxidizing gas through hole, the pressurizing assembly is fixed above the electrolytic cell cover, and the pressurizing assembly applies pressing force to the sealing assembly during testing. Compared with the prior art, the utility model provides an in situ test condition, improved test accuracy and efficiency of software testing.

Description

Vertical electrochemical measuring cell for simulating in-situ test of fuel cell

Technical Field

The utility model relates to a vertical electrochemical measurement cell especially relates to a vertical electrochemical measurement cell of simulation fuel cell normal position test.

Background

Under the complex backgrounds of deep adjustment of world energy pattern, acceleration of actions for global coping with climate change and continuous strengthening of resource and environment constraints, hydrogen energy is considered to be one of the major strategic directions of world energy and power transformation, and is concerned by countries in the world. The development of the hydrogen energy industry is accelerated, the five-in-one strategic layout is implemented, and the method is a strategic selection for China to deal with global climate change, practice the strategy of developing the Yangtze river economic zone, guarantee the national energy supply safety and realize sustainable development. The application of hydrogen energy is varied, and includes various ways such as fuel cells, gas turbines, hydrogen internal combustion engines, general combustion, and the like. The fuel cell is one of the most important ways of applying hydrogen energy at present, has higher potential efficiency compared with an internal combustion engine due to the fact that the fuel cell does not need a Carnot cycle passing through a heat engine, does not have nitrogen oxide emission generated by combustion of hydrogen gas, and is the most ideal way of utilizing the hydrogen energy. In the early stage of commercial application, fuel cells face the problems of insufficient life, high cost, and the like, and further research on the internal key components such as bipolar plates and membrane electrodes is needed to improve the life of the relevant components and reduce the consumption of internal noble metals, so that the bipolar plates and membrane electrodes need to be finely designed and a large number of tests and verification experiments need to be performed. In the test experiment, the in-situ experiment and the dislocation experiment are two kinds, the in-situ experiment refers to that a part is placed in a real fuel cell for related test, the time consumption is long, the cost is high, the interference factors are more, the dislocation test can be carried out for more rapidly measuring certain performances of the key part, an electrochemical measuring cell is usually used in the aspect of electrochemistry, and the electrochemical experiment can be conveniently, rapidly and cheaply carried out on a sample of the key part so as to represent the related performances.

Through the literature search of the prior art, the research of the current electrochemical test focuses on the electrochemical corrosion measurement of general materials and components to characterize the electrochemical performance of common samples.

Chinese patent CN 105758906A: an electrochemical test device is disclosed, which is particularly suitable for metals difficult to weld and cut by wire, and can accurately control the distance between electrodes and quickly change working electrodes.

Chinese patent CN 206497017U: a corrosion electrochemical testing device is disclosed, which comprises an electrolytic cell, an electrochemical testing device, a heating device and a heat preservation device and can simulate the corrosion process of materials under various complex corrosive gas environments.

Chinese patent CN 2581991Y: the utility model provides a closed constant temperature electrochemistry measuring cell discloses an electrochemistry measuring cell that can control reaction temperature, through the temperature of liquid water control reaction chamber, makes going on of reaction not influenced by ambient temperature to can keep sealed when stretching into electrode and gas conduit, nevertheless the utility model is not to test to the fuel cell part, and test condition is too wide, is unfavorable for control experiment variable.

Chinese patent CN 101004403A: the electrolytic cell for the electrochemical test discloses an electrochemical test electrolytic cell comprising an upper cover plate, a lower cover plate and a sleeve, and is made of a plastic material, so that a sample can be conveniently and firmly added at the bottom of an electrolyte, the experimental deviation caused by corrosion of steel materials is avoided, the electrolytic cell can be used for performing the electrochemical test experiment on a membrane electrode of a fuel cell, but the membrane electrode is positioned at the bottom of the test cell in the use process, the long-time electrolyte soaking can generate the influence on the membrane electrode in the aspects of structure and electrochemistry, and the characteristic of the membrane electrode cannot be accurately reflected.

Chinese patent CN 102735604A: an electrolytic cell for corrosion electrochemical measurement discloses an electrolytic cell capable of clamping and testing corrosion electrochemical performance of a sheet material, can realize quick clamping of a test sample and assembly of an experimental device, and can meet constant-temperature electrochemical test from room temperature to boiling conditions while maintaining the sealing performance of a working electrode. Although the device can test the membrane electrode with a sheet structure, the membrane electrode cannot be tightly confined, so that the membrane electrode is layered due to different expansion degrees of different layered materials after being soaked in an electrolyte, the in-situ state in the fuel cell cannot be simulated, the test result is inaccurate, and the test requirement of key components of the fuel cell cannot be met.

Although various electrochemical testing cells capable of testing general samples are mentioned in the existing related research, constant temperature design is mostly carried out, but the design is not carried out aiming at key components of a fuel cell, electrolytes and reaction gases cannot be guaranteed to appear simultaneously, the in-situ condition of the samples cannot be guaranteed during electrochemical testing, the full plane of membrane electrodes and similar components in the testing process cannot be guaranteed, the obtained data is inaccurate, and the in-situ performance cannot be reflected through an off-site experiment.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcoming the above-mentioned drawbacks of the prior art and providing a vertical electrochemical measuring cell for simulating in-situ testing of a fuel cell.

The purpose of the utility model can be realized through the following technical scheme:

a vertical electrochemical measuring cell for simulating in-situ test of fuel cell comprises an electrolytic cell body, an electrolytic cell cover sealed with the electrolytic cell body is arranged on the electrolytic cell body, a test window for placing a test sample, an electrolytic cell gas escape outlet and an electrolyte adding reserved port are arranged on the electrolytic cell cover, a reference electrode, a counter electrode and a reducing gas conduit are arranged in the electrolytic cell body, the vertical electrochemical cell further comprises a clamping assembly, a sealing assembly and a pressurizing assembly, the clamping assembly is of a two-piece structure, the test sample is clamped in the clamping assembly, the clamping assembly is arranged in the test window, a notch for the electrolyte to penetrate and contact the test sample is arranged on the bottom surface of the clamping assembly, a working electrode is arranged on the sealing assembly, the sealing assembly is arranged on the clamping assembly, and the working electrode is contacted with the top surface of the clamping assembly, the sealing assembly is provided with an oxidizing gas through hole, the pressurizing assembly is fixed above the electrolytic cell cover, and the pressurizing assembly applies vertical downward pressure to the sealing assembly during testing.

The clamping assembly comprises a sample clamping plate and a flow field plate, a plurality of strip notches which penetrate through the upper surface and the lower surface of the sample clamping plate and are arranged in parallel are formed in the sample clamping plate, strip flow field grooves are formed in positions, corresponding to the strip notches of the sample clamping plate, on the lower surface of the flow field plate, and test samples are flatly clamped between the sample clamping plate and the flow field plate.

The width of the strip-shaped notch is equal to that of the strip-shaped flow field groove, and the width range of the strip-shaped notch is 0.5 mm-3 mm.

The sealing assembly comprises a sealing cover and a sealing ring, the shape and the size of the inner ring of the sealing cover are matched with those of the clamping assembly, the sealing ring is embedded in the inner ring of the sealing cover, and the working electrode is embedded on the inner surface of the sealing cover.

The pressurizing assembly comprises a top cover support, a pressurizing machine, a pressurizing push rod and a pressing plate, the top cover support is detachably arranged on the electrolytic cell cover, the pressurizing machine passes through the pressurizing support and is fixed above the top cover support, the pressurizing push rod penetrates through the top cover support and is vertically arranged in the middle of the top cover support, one end of the pressurizing push rod is connected with the pressurizing machine, the other end of the pressurizing push rod is connected with the pressing plate, and during pressurizing, the pressing plate is attached to the upper surface of the sealing assembly.

The top cover support comprises 2 ribs which are arranged in a crossed mode, the middle area of each rib is arched upwards, two ends of each rib are fixed on the electrolytic cell cover, and the pressurizing machine is fixed above the arched area in the middle of the top cover support through the pressurizing support.

The electrolytic cell body include electrolytic cell base and electrolytic cell water jacket, the electrolytic cell base on be equipped with the base groove of installation electrolytic cell water jacket, electrolytic cell water jacket seal install the base groove on form electrolyte and hold the chamber, electrolytic cell lid seal installation at electrolytic cell water jacket top.

The electrolytic cell body on be equipped with the level gauge that is used for showing electrolyte liquid level, the level gauge be located the electrolytic cell water jacket outside and hold the chamber with electrolyte and communicate.

And a marking line is arranged on the liquid level meter corresponding to the lower surface of the test sample in the clamping assembly and used for stopping filling the electrolyte when the electrolyte liquid level in the electrolyte accommodating cavity reaches the position marked by the marking line during testing.

The middle area of the electrolytic cell cover is sunken downwards to form a lower concave plane, the test window is arranged on the lower concave plane, and a gas guide pipe preformed hole and a reference electrode preformed hole are arranged at the corresponding positions of the electrolytic cell cover corresponding to the reducing gas guide pipe and the reference electrode.

Compared with the prior art, the utility model has the advantages of as follows:

(1) the utility model discloses provide normal position test conditions such as acid environment, normal position structure, normal position interface, reaction gas for the sample in the testing process, can be used for testing membrane electrode and similar subassembly sample among the fuel cell, avoid using fuel cell test platform, and can accelerate the test procedure of sample, thereby the electrochemical performance and the durability of convenient, low-cost, accurate analysis sample, in order to promote the development of membrane electrode and similar subassembly, efficiency of software testing;

(2) the utility model discloses a sample splint and the tight sample of flow field board clamp of similar bipolar plate structure can guarantee the comparatively even atress of sample on the whole plane, consequently can prevent that membrane electrode test sample from soaking the different sample layering that leads to of different lamellar structure water swelling degree in-process, can increase the accuracy of experiment.

(3) The clamping assembly can simulate the stress state of a membrane electrode in a fuel cell by arranging the strip-shaped notches penetrating through the upper surface and the lower surface of the sample clamping plate and the strip-shaped flow field grooves penetrating through the lower surface of the flow field plate, and provides reaction gas for the surface of a test sample, so that an electrochemical test has in-situ test conditions of the fuel cell, such as an acid environment, an in-situ structure, an in-situ interface, the reaction gas and the like, an ex-situ experiment can more accurately react the in-situ performance of the sample, and the test efficiency of the sample is greatly improved;

(4) the utility model discloses a mark line is markd corresponding to test sample lower surface high position on the level gauge, consequently can accurately reflect the height of liquid level in the electrolytic bath, makes sample lower surface sustained contact electrolyte, does not have too big fluid pressure simultaneously, guarantees the accuracy of experiment to can keep the height of liquid level in long-time testing process, guarantee the validity of durability test.

Drawings

FIG. 1 is a schematic structural diagram of a vertical electrochemical measuring cell for simulating in-situ testing of a fuel cell according to the present invention;

FIG. 2 is a schematic view of the structure of the electrolytic cell cover of the present invention;

FIG. 3 is a schematic view of a membrane electrode test sample according to the present invention;

fig. 4 is a schematic diagram of the state change of the proton exchange membrane in the process of testing the membrane electrode sample by the general electrochemical measuring cell of the present invention.

In the figure, 1 is a pressurizing machine, 2 is a pressurizing bracket, 3 is a pressurizing push rod, 4 is a press plate, 5 is a top cover bracket, 6 is a reference electrode, 7 is an electrolytic cell cover, 8 is an electrolytic cell water outlet, 9 is an electrolytic cell water jacket, 10 is an electrolytic cell water inlet, 11 is an electrolytic cell base, 12 is a sealing component, 13 is a working electrode, 14 is a flow field plate, 15 is a reducing gas conduit, 16 is a test sample, 17 is a sample clamping plate, 18 is a liquid level meter, 19 is an electrolyte, 20 is a counter electrode, 71 is a cover body, 72 is an electrolytic cell gas escape outlet, 73 is a pressurizing component installation reserved hole, 74 is a reference electrode reserved hole, 75 is an electrolytic cell cover installation reserved hole, 76 is a test window, 77 is a recessed boundary, 78 is a gas conduit reserved hole, 79 is an electrolyte adding reserved hole, 161 is a proton exchange membrane, 162 is a catalytic layer, 163 is a microporous layer, and 164 is a gas diffusion layer.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.

Examples

As shown in figure 1, a vertical electrochemical measuring cell for simulating in-situ test of a fuel cell comprises an electrolytic cell body, an electrolytic cell cover 7 sealed with the electrolytic cell body is arranged on the electrolytic cell body, a test window 76 for placing a test sample 16, an electrolytic cell gas escape outlet 72 and an electrolyte adding reserved port 79 are arranged on the electrolytic cell cover 7, a reference electrode 6, a counter electrode 20 and a reducing gas conduit 15 are arranged in the electrolytic cell body, the vertical electrochemical cell further comprises a clamping component, a sealing component 12 and a pressurizing component, the clamping component is of a two-piece structure, the test sample 16 is clamped in the clamping component, the clamping component is arranged in the test window 76, a notch for the electrolyte 19 to penetrate and contact the test sample 16 is arranged on the bottom surface of the clamping component, a working electrode 13 is arranged on the sealing component 12, the sealing component 12 is arranged on the clamping component, and the working electrode 13 is contacted with the top surface of the clamping component, the sealing assembly 12 is provided with an oxidizing gas through hole, the pressurizing assembly is fixed above the electrolytic cell cover 7, and the pressurizing assembly applies vertical downward pressure to the sealing assembly 12 during testing.

The electrolytic cell body comprises an electrolytic cell base 11 and an electrolytic cell water jacket 9, a base groove for mounting the electrolytic cell water jacket 9 is formed in the electrolytic cell base 11, the electrolytic cell water jacket 9 is hermetically mounted on the base groove to form an electrolyte containing cavity, an electrolytic cell cover 7 is hermetically mounted at the top of the electrolytic cell water jacket 9, an electrolytic cell water outlet 8 and an electrolytic cell water inlet 10 are formed in the electrolytic cell water jacket 9, and temperature management can be provided for the electrolytic cell. The electrolytic cell body is provided with a liquid level meter 18 for displaying the liquid level of the electrolyte 19, and the liquid level meter 18 is positioned outside the electrolytic cell water jacket 9 and communicated with the electrolyte 19 accommodating cavity. A marking line is arranged on the liquid level meter 18 corresponding to the lower surface of the test sample 16 in the clamping assembly, and the marking line is used for stopping filling the electrolyte 19 when the liquid level of the electrolyte 19 in the electrolyte accommodating cavity reaches the position marked by the marking line during testing.

As shown in fig. 2, the central region of the lid body 71 of the cell cover 7 is depressed downward to form a depressed plane, and a test window 76 is opened in the depressed plane. Gas guide pipe preformed holes 78 and reference electrode preformed holes 74 are formed in the positions, corresponding to the positions of the reducing gas guide pipe 15 and the reference electrode 6, of the electrolytic cell cover 7 on the outer side of the sunken boundary 77, and reinforcing ribs are arranged on the side faces of two sides of the sunken area of the electrolytic cell cover 7 to increase the strength of the sunken area. Outside sunken boundary 77, still symmetrical distribution has 4 pressure components to install

preformed hole

73 and 4 electrolytic cell lid installation preformed hole 75 on the electrolytic cell lid 7, and pressure components installs preformed hole 73 and is used for fixing pressure components on it through the bolt, and electrolytic cell lid installation preformed hole 75 is used for through bolt with electrolytic cell lid 7 and electrolytic cell base 11 fixed connection.

The clamping assembly comprises a sample clamping plate 17 and a flow field plate 14, a plurality of strip-shaped notches which penetrate through the upper surface and the lower surface of the sample clamping plate 17 and are arranged in parallel are formed in the sample clamping plate 17, strip-shaped flow field grooves are formed in positions, corresponding to the strip-shaped notches of the sample clamping plate 17, on the lower surface of the flow field plate 14, of the strip-shaped notches, ridges are formed on the sample clamping plate 17 and the flow field plate 14, test samples 16 are flatly laid and clamped between the sample clamping plate 17 and the flow field plate 14, the ridges of the sample clamping plate 17 and the ridges of the flow field plate 14 are in one-to-one correspondence and are abutted, the widths of the strip-shaped notches and the strip-shaped flow field grooves are equal, the width ranges are. In the cell system, the sample clamping plate 17 and the flow field plate 14 are used in combination, and it should be ensured that the sample does not receive shear stress during clamping. Sample clamping plate 17 is made of an insulator and flow field plate 14 is made of a material that conducts electricity well, such as graphite, metal, etc., while both should be resistant to corrosion by electrolyte 19. For different models of fuel cells, different sample clamping plates 17 and flow field plates 14 can be replaced for use so as to simulate the in-situ conditions of the membrane electrodes in the fuel cells.

The sealing assembly 12 comprises a sealing cover and a sealing ring, the shape and the size of the inner ring of the sealing cover are matched with those of the clamping assembly, the sealing ring is embedded in the inner ring of the sealing cover, and the working electrode 13 is embedded on the inner surface of the sealing cover. The sealing assembly 12 is matched with the working electrode 13 to apply uniform clamping force to the sample, so that the sample is kept sealed, gas and liquid are prevented from leaking, required oxidizing gas is continuously introduced into the sample through the reserved oxidizing gas through holes, the working electrode 13 forms the working electrode 13 of a three-electrode system, uniform clamping force is applied to the sample flow field plate 14, and good circuit communication with the flow field plate 14 is kept.

The pressurization subassembly includes top cap support 5, pressurization support 2, presser 1, pressurization push rod 3 and clamp plate 4, top cap support 5 is detachable installs on electrolytic bath lid 7, top cap support 5 adopts 2 alternately arranged ribs, the rib middle zone arches upwards, the rib both ends are fixed on electrolytic bath lid 7, presser 1 is fixed in top cap support 5 middle arch region top through pressurization support 2, pressurization push rod 3 runs through top cap support 5 and sets up perpendicularly at top cap support 5 middle part, presser 1 is connected to 3 one end of pressurization push rod, clamp plate 4 is connected to the other end, during the pressurization, clamp plate 4 and the laminating of seal assembly 12 upper surfaces. The press 1 provides a pressing force to the sealing cover, fixes the test specimen 16, ensures sealing, and applies a compressive stress to the specimen to simulate the in-situ state of the fuel cell. The press 1 may be a cylinder type press 1, a hydraulic type press 1, or an electromagnetic type press 1.

The test sample 16 is a membrane electrode assembly in a fuel cell, and can also be a similar multi-layer thin sheet sample, and the membrane electrode test sample 16 suitable for the electrochemical test cell of the present invention refers to fig. 3, and includes a proton exchange membrane 161, a catalytic layer 162, a microporous layer 163, and a gas diffusion layer 164. The utility model provides an electrochemistry test uses three electrode system, contains working electrode 13, counter electrode 20 and reference electrode 6, is connected to the corresponding interface of electrochemistry workstation when the test to can test after accomplishing the sample installation.

The specific mode of the vertical electrochemical measuring cell simulated fuel cell in-situ test adopting the simulated fuel cell in-situ test is as follows:

firstly, assembling an electrolytic cell, placing an electrolytic cell base 11 on a plane, placing an electrolytic cell water jacket 9 on a base groove, sealing the electrolytic cell water jacket and the base groove by a sealing ring, installing a liquid level meter 18 on the electrolytic cell base 11, and keeping the interior of the liquid level meter 18 communicated with the interior of the electrolytic cell. Installing a reference electrode 6 and a reducing gas conduit 15 on an electrolytic cell cover 7, installing the installed electrolytic cell cover 7 on an electrolytic cell water jacket 9, sealing the electrolytic cell cover 7 and the electrolytic cell water jacket 9 by using a sealing ring, connecting and fastening the electrolytic cell cover 7 and an electrolytic cell base 11 by using bolts, and then connecting the top end of a liquid level meter 18 at a reserved position of the electrolytic cell cover 7 to ensure that the liquid level meter 18 can normally display the liquid level in the electrolytic cell;

after the electrolytic cell is installed, pouring the pre-configured electrolyte 19 into the electrolytic cell from the test window 76 of the sample clamp plate 17 which is not installed, keeping the liquid level slightly lower than the height of the sample clamp plate 17, then installing the sample clamp plate 17 into the reserved groove, enabling one surface of the proton exchange membrane of the test sample 16 to face downwards, and flatly placing the test sample on the sample clamp plate 17;

after the sample is placed, a top cover bracket 5 is installed on an electrolytic cell cover 7, a pressurizing push rod 3 is pushed by operating a pressurizing machine 1, a sealing cover is pressed tightly, a test sample 16 is stressed uniformly, a sealing ring is arranged around the test sample to prevent gas and liquid from leaking, further pressurization is carried out to reach a preset pressure, after the test sample 16 is pressed tightly, a small amount of electrolyte which is pre-configured is added from an electrolyte adding reserved opening 19 on the electrolytic cell cover 7 until the liquid level in a liquid level meter 18 exceeds the scale mark of the lower surface of the sample, and the electrolytic cell is vibrated slightly until no residual bubbles exist on the surface of the sample;

finally, the reference electrode 6, the counter electrode 20 and the working electrode 13 are connected to an electrochemical workstation, and respective oxidizing gas and reducing gas are introduced through the oxidizing gas through hole and the reducing gas conduit 15 for electrochemical testing.

For a common electrochemical measuring cell, a sample is clamped by a round hole or a square hole, so that the center of the sample is not clamped and does not conform to the actual state of a membrane electrode in a fuel cell, and the test of the sample does not have the in-situ condition in the fuel cell. Referring to fig. 4, a schematic diagram of a state change of a proton exchange membrane in a process of testing a membrane electrode sample in a general electrochemical measurement cell is shown, fig. 4 (a) is a schematic diagram of a state before the proton exchange membrane absorbs water, and fig. 4 (b) is a schematic diagram of a state after the proton exchange membrane absorbs water.

The utility model discloses in to membrane electrode test sample 16 press from both sides the dress, the form of sample splint 17 and flow field plate 14 collocation has been used, guarantee the atress condition of sample and be close in fuel cell, simultaneously because sample splint 17 is less with flow field plate 14's support bar interval, can avoid in the sample behind different layer structure contact electrolyte 19, produce the swelling phenomenon of not equidimension and the liquid cavity that leads to, guarantee the accuracy of test result, can improve the problem of general electrochemistry measurement pool in testing fuel cell membrane electrode sample. Meanwhile, the sealing cover is provided with gas through holes, so that different gases can be introduced into a sample below the flow field plate 14 to meet specific experimental requirements.

The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.

Claims

1. A vertical electrochemical measuring cell for simulating in-situ test of a fuel cell comprises an electrolytic cell body, wherein an electrolytic cell cover (7) sealed with the electrolytic cell body is arranged on the electrolytic cell body, a test window (76) for placing a test sample (16), an electrolytic cell gas escape outlet (72) and an electrolyte adding reserved port (79) are formed in the electrolytic cell cover (7), and a reference electrode (6), a counter electrode (20) and a reducing gas conduit (15) are arranged in the electrolytic cell body, the vertical electrochemical cell is characterized by further comprising a clamping assembly, a sealing assembly (12) and a pressurizing assembly, the clamping assembly is of a two-piece structure, the test sample (16) is clamped in the clamping assembly, the clamping assembly is arranged in the test window (76), a notch for enabling an electrolyte (19) to penetrate through and contact the test sample (16) is formed in the bottom surface of the clamping assembly, the device is characterized in that a working electrode (13) is arranged on the sealing assembly (12), the sealing assembly (12) is arranged on the clamping assembly, the working electrode (13) is in contact with the top surface of the clamping assembly, an oxidizing gas through hole is formed in the sealing assembly (12), the pressurizing assembly is fixed above the electrolytic cell cover (7), and the pressurizing assembly applies vertical downward pressure to the sealing assembly (12) during testing.

2. The vertical electrochemical measuring cell for simulating the in-situ test of the fuel cell according to claim 1, wherein the clamping assembly comprises a sample clamping plate (17) and a flow field plate (14), the sample clamping plate (17) is provided with a plurality of strip-shaped notches which penetrate through the upper surface and the lower surface of the sample clamping plate (17) and are arranged in parallel, the lower surface of the flow field plate (14) is provided with strip-shaped flow field grooves corresponding to the strip-shaped notches of the sample clamping plate (17), and the test sample (16) is flatly clamped between the sample clamping plate (17) and the flow field plate (14).

3. The vertical electrochemical measuring cell of claim 2, wherein the width of the strip-shaped notch and the width of the strip-shaped flow field channel are equal and range from 0.5mm to 3 mm.

4. The vertical electrochemical measuring cell for simulating in-situ testing of a fuel cell according to claim 1, wherein the sealing assembly (12) comprises a sealing cover and a sealing ring, the shape and size of the inner ring of the sealing cover are matched with those of the clamping assembly, the sealing ring is embedded in the inner ring of the sealing cover, and the working electrode (13) is embedded on the inner surface of the sealing cover.

5. The vertical electrochemical measuring cell for simulating the in-situ test of the fuel cell according to claim 1, wherein the pressurizing assembly comprises a top cover support (5), a pressurizing support (2), a pressurizing machine (1), a pressurizing push rod (3) and a pressure plate (4), the top cover support (5) is detachably mounted on an electrolytic cell cover (7), the pressurizing machine (1) is fixed above the top cover support (5) through the pressurizing support (2), the pressurizing push rod (3) penetrates through the top cover support (5) and is vertically arranged in the middle of the top cover support (5), one end of the pressurizing push rod (3) is connected with the pressurizing machine (1), the other end of the pressurizing push rod is connected with the pressure plate (4), and during pressurizing, the pressure plate (4) is attached to the upper surface of the sealing assembly (12).

6. The vertical electrochemical measuring cell for simulating the in-situ test of the fuel cell as claimed in claim 5, wherein the top cover bracket (5) comprises 2 ribs arranged in a cross manner, the middle area of each rib is arched upwards, the two ends of each rib are fixed on the electrolytic cell cover (7), and the pressurizing machine (1) is fixed above the middle arched area of the top cover bracket (5) through the pressurizing bracket (2).

7. The vertical electrochemical measuring cell for simulating the in-situ test of the fuel cell according to claim 1, wherein the cell body comprises a cell base (11) and a cell water jacket (9), the cell base (11) is provided with a base groove for installing the cell water jacket (9), the cell water jacket (9) is hermetically installed on the base groove to form an electrolyte accommodating cavity, and the cell cover (7) is hermetically installed on the top of the cell water jacket (9).

8. The vertical electrochemical measuring cell for simulating the in-situ test of the fuel cell as claimed in claim 7, wherein the cell body is provided with a liquid level meter (18) for displaying the liquid level of the electrolyte (19), and the liquid level meter (18) is positioned outside the water jacket (9) of the cell and is communicated with the electrolyte accommodating cavity.

9. The vertical electrochemical measuring cell of claim 8, wherein the level gauge (18) is provided with a marking line corresponding to the lower surface of the test sample (16) in the clamping assembly, and the marking line is used for stopping filling the electrolyte (19) when the level of the electrolyte (19) in the electrolyte containing cavity reaches the position marked by the marking line during the test.

10. The vertical electrochemical measuring cell for simulating the in-situ test of the fuel cell according to claim 1, wherein the middle area of the cell cover (7) is recessed downwards to form a recessed plane, the test window (76) is arranged on the recessed plane, and a gas conduit preformed hole (78) and a reference electrode preformed hole (74) are arranged on the corresponding positions of the cell cover (7) corresponding to the reducing gas conduit (15) and the reference electrode (6).