CN210089752U - Fuel cell detection equipment - Google Patents

Abstract

The utility model discloses a fuel cell detection device, which is used for detecting a membrane electrode, a gas diffusion layer and a bipolar plate of a fuel cell, and comprises a base, a frame arranged on the base, a myriameter component arranged on the frame, a driving mechanism arranged on the frame and positioned below the myriameter component, a detection component which is connected below the driving mechanism and can move along with the driving mechanism in the vertical direction, a static terminal and a universal meter which are arranged on the base and matched with the detection component, the multimeter is respectively electrically connected with the detection assembly and the static terminal through leads, the driving mechanism is provided with a driving shaft which can be lifted in the vertical direction, the myriameter assembly is connected with the driving shaft and senses the movement displacement of the driving shaft in the vertical direction, and the detection assembly is connected with the driving shaft and can move in the vertical direction. The utility model discloses a check out test set can realize the purpose of the multi-functional detection of a machine.

Description

Fuel cell detection equipment

Technical Field

The utility model belongs to the technical field of check out test set, particularly, relate to a fuel cell check out test set.

Background

A fuel cell is a device that directly converts chemical energy in a fuel and an oxidant into electrical energy through an electrochemical reaction. The proton exchange membrane fuel cell has the advantages of high energy conversion efficiency, environmental friendliness, quick start at room temperature, small volume, no electrolyte loss, easy water drainage, long service life, high specific power and specific energy and the like besides the common characteristics of the fuel cell. Therefore, the proton exchange membrane fuel cell has very wide application prospect. The method is not only suitable for the construction of a distributed power station, but also suitable for mobile power supply. It is a novel military and civil portable power source. Hydrogen is the best household power source as the main energy carrier in the hydrogen era in the future.

The major components of a fuel cell include a membrane electrode, a gas diffusion layer, and a bipolar plate. In order to increase the output voltage of the fuel, it is necessary to reduce the ohmic resistance of the cell to reduce the voltage drop inside the cell during operation, and it is required that the bulk resistance and the contact resistance of each component be as small as possible. Meanwhile, in order to ensure the safe operation of the fuel cell, hydrogen and oxygen (or air) inside the cell must be isolated from each other, so the bipolar plate must be capable of blocking gas, and the design index of the membrane electrode must meet the gas permeability specified by the national standard. In addition, in order to ensure that the anode and cathode of the fuel cell are not short-circuited, after the membrane electrode assembly of the fuel cell and the gas diffusion layer are assembled into the membrane electrode assembly, the leakage current or resistance detection must be performed after the packaging.

At present, the thickness detection of a membrane electrode, a bipolar plate and a gas diffusion layer which are key parts of a fuel cell mainly depends on a micrometer and a micrometer, the body resistance detection of the bipolar plate and the gas diffusion layer mainly depends on a four-probe method, and the air tightness detection of the bipolar plate and the membrane electrode mainly depends on a bubbling method. The compressibility test of the gas diffusion layer was mainly performed by a compression tensile tester. The leakage current detection of the membrane electrode assembly after the membrane electrode and the gas diffusion layer are assembled mainly depends on a constant current charging method.

The thickness detection depends on a dial indicator or a micrometer, the pressure cannot be controlled, and the high-precision thickness detection under large pressure cannot be realized. And there is no commercially available instrument on the market that can meet the contact resistance of a fuel cell assembly at 100PSI (cell assembly pressure standard) pressure and high precision thickness detection to 1 um. The four-probe method is suitable for bulk resistance detection of isotropic materials, but the gas diffusion layer is a carbon fiber tissue in-plane arrangement structure, and the resistivity difference between the two directions in the vertical plane and the in-plane is large, so that the four-probe method cannot accurately detect the bulk resistance of the gas diffusion layer in the vertical plane. The tensile compression testing machine is used for testing the compression ratio of the gas diffusion layer, and the testing precision is often insufficient, so that the tensile compression testing machine is not suitable for measuring the gas diffusion layer sheet material with the thickness of micron order. The constant current charging method is relatively complex to detect the leakage current of the membrane electrode assembly, and the energy consumption of the test is large. The detection equipment has single function, low detection speed and few detection functions, and is difficult to meet the requirement of quickly detecting key parts of the fuel cell.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least.

One of the purposes of the utility model is to provide a fuel cell detection device, which is used for detecting a membrane electrode, a gas diffusion layer and a bipolar plate of a fuel cell, and comprises a base, a frame arranged on the base, a ten-thousandth meter component arranged on the frame, a driving mechanism arranged on the frame and positioned below the ten-thousandth meter component, a detection component which is connected below the driving mechanism and can move along with the driving mechanism in the vertical direction, a static terminal and a universal meter which are arranged on the base and matched with the detection component, the multimeter is respectively electrically connected with the detection assembly and the static terminal through leads, the driving mechanism is provided with a driving shaft which can be lifted in the vertical direction, the myriameter assembly is connected with the driving shaft and senses the movement displacement of the driving shaft in the vertical direction, and the detection assembly is connected with the driving shaft and can move in the vertical direction.

Further, ten-thousandth meter subassembly including set up in ten-thousandth meter support in the frame, install in ten-thousandth meter on the ten-thousandth meter support, ten-thousandth meter with the actuating shaft is connected.

Further, the frame is a portal frame, a through hole for the driving shaft to pass through is formed in the top of the portal frame, and the driving shaft passes through the through hole and is connected with the myriameter.

Further, ten thousand divide the table including the gauge outfit and along vertical direction setting and with the detection axle that the gauge outfit is connected, the detection axle with the drive shaft is connected, just the axis of detection axle with the drive shaft axis is on same straight line.

Further, the driving mechanism is a driving cylinder, the driving cylinder is mounted on the portal frame through a screw, and the driving shaft is a cylinder shaft.

Furthermore, the detection assembly comprises a ball hinge joint connected with the driving shaft, an insulation pressure head arranged at one end, far away from the driving shaft, of the ball hinge joint, and a pressure applying terminal arranged at one end, far away from the ball hinge joint, of the insulation pressure head, wherein the pressure applying terminal is matched with the static terminal.

Further, the pressure terminal is a pressure terminal made of a conductive material, and the static terminal is a static terminal made of a conductive material.

Furthermore, the terminal of exerting pressure pass through countersunk screw with the insulating pressure head is connected, quiet terminal is fixed in through countersunk screw on the base.

Further, the multimeter is electrically connected to the voltage application terminal through a wire.

Further, the frame is fixed on the base through screws.

The utility model discloses a fuel cell check out test set for membrane electrode, gas diffusion layer and bipolar plate to fuel cell detect. During detection, a membrane electrode, a gas diffusion layer and a bipolar plate to be detected are placed between the detection assembly and the static terminal, the driving mechanism drives the detection assembly to move downwards, so that how many detection assemblies are matched with the static terminal, the driving mechanism drives displacement change to be sensed through a universal meter, the thickness and the compression ratio of the membrane electrode, the gas diffusion layer and the bipolar plate are detected, the universal meter is arranged to be connected with the detection assembly and the static terminal, resistance detection and electric leakage detection of the membrane electrode, the gas diffusion layer and the bipolar plate are achieved, the purpose of multifunctional detection of one device is achieved, the purpose of quickly detecting the fuel cell is well met, and the detection efficiency is improved.

Another objective of the present invention is to provide a fuel cell detection device for detecting a membrane electrode and a bipolar plate of a fuel cell, comprising a base, a frame disposed on the base, a ten-thousandth meter component mounted on the frame, a driving mechanism mounted on the frame and located below the ten-thousandth meter component, an air tightness detection component connected below the driving mechanism and capable of moving along with the driving mechanism in a vertical direction, an air tightness detection bottom plate disposed on the base and matched with the air tightness detection component, an air pressure regulating valve, and a digital display flow meter, the air pressure regulating valve is communicated with the air tightness detection assembly through an air pipe, the digital display flowmeter is communicated with the air tightness detection bottom plate through an air pipe, the driving mechanism is provided with a driving shaft capable of lifting in the vertical direction, and the air tightness detection assembly is connected with the driving shaft and can move in the vertical direction.

Further, the air tightness detection assembly comprises a ball hinge joint connected with the driving shaft, an air tightness detection pressure head arranged at one end, far away from the driving shaft, of the ball hinge joint, and a first ventilation plug arranged on the air tightness detection pressure head, and the air tightness detection pressure head is matched with the air tightness detection bottom plate.

Further, the gas tightness detects the pressure head with be provided with the sealing washer between the gas tightness detects the bottom plate.

Further, the air pressure regulating valve is communicated with the first ventilation plug through an air pipe.

Further, a second ventilation plug is arranged on the air tightness detection bottom plate, and the digital display flowmeter is connected with the second ventilation plug.

The fuel cell detection device can realize air tightness detection and gas permeability detection of a membrane electrode and a bipolar plate of a fuel cell.

The specific principle and other advantages of the present invention that can achieve the above-mentioned effects can be described by referring to the embodiments, which are not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of an embodiment of a fuel cell testing apparatus according to the present invention.

Fig. 2 is a schematic partial sectional view of an embodiment of a fuel cell testing apparatus according to the present invention.

Fig. 3 is a perspective structural diagram of a frame of an embodiment of a fuel cell testing apparatus according to the present invention.

Fig. 4 is a schematic structural diagram of another embodiment of the fuel cell testing apparatus of the present invention.

Fig. 5 is a partial sectional structural view of fig. 4.

Fig. 6 is a schematic diagram of a partial enlarged structure of another embodiment of the fuel cell testing apparatus according to the present invention.

Fig. 7 is a partial structural schematic view of a fuel cell testing apparatus of fig. 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Unless otherwise specified, the words in this application, such as "upper, lower, bottom, top, vertical, overlooking, horizontal, top, bottom" and the like, referring to the directions shown in the drawings are not to be construed as limiting the technical solution of the present invention.

Referring to fig. 1 to 3, a first embodiment of a fuel cell testing apparatus according to the present invention is shown, and is used for testing a membrane electrode, a gas diffusion layer and a bipolar plate of a fuel cell. Fuel cell check out test set mainly realize the detection to membrane electrode, gas diffusion layer and bipolar plate thickness, compression ratio to the realization detects gas diffusion layer and bipolar membrane's resistance, and detects to the leakage current of membrane electrode or encapsulation short circuit. The membrane electrode, the gas diffusion layer, and the bipolar plate are hereinafter referred to as a sample to be measured.

The utility model discloses a first embodiment include base 1, set up in frame 2 on the base 1, install in ten thousand table subassembly 3 in the frame 2, install in just be located in frame 2 actuating mechanism 4 of ten thousand table subassembly 3 below, connect in actuating mechanism 4 below just can follow actuating mechanism 4 at the detection component 6 that vertical direction removed, set up in on the base 1 and with detection component 6 complex stationary terminal 7 and universal meter 5. The frame 2 is fixed on the base 1 through screws.

The multimeter 5 is electrically connected with the detection component 6 and the static terminal 7 respectively through a lead 51, the driving mechanism 4 is provided with a driving shaft 42 which can be lifted and lowered in the vertical direction, the multimeter component 3 is connected with the driving shaft 42 and senses the movement and displacement of the driving shaft 42 in the vertical direction, and the detection component 6 is connected with the driving shaft 42 and can move in the vertical direction. The myriameter assembly 3 is used for measuring the moving distance of the driving shaft 42 of the driving mechanism 4 in the vertical direction and achieving the purpose of detecting the thickness and the compression rate of a sample to be detected through corresponding conversion. Through setting universal meter 5 with detection component 6 and quiet terminal 7 electricity are connected, reach through corresponding operation and detect the sample resistance that awaits measuring, leak current and whether have the encapsulation short circuit problem.

Preferably, the parts per million meter assembly 3 includes a parts per million meter bracket 31 disposed on the frame 2, and a parts per million meter 32 mounted on the parts per million meter bracket 31, wherein the parts per million meter 32 is connected to the driving shaft 42.

Preferably, the rack 2 is a gantry, a through hole 21 for the driving shaft 42 to pass through is formed in the top of the gantry, and the driving shaft 42 passes through the through hole 21 and is connected with the dial gauge 32. The ten-thousandth meter 32 comprises a meter head 321 and a detection shaft 322 which is arranged along the vertical direction and connected with the meter head, wherein the detection shaft 322 is connected with the driving shaft 42, and the axis of the detection shaft 322 is on the same straight line with the axis of the driving shaft 42. By arranging the axes of the detection shaft 322 and the driving shaft 42 on the same straight line, the influence of the deformation of the shaft after pressure is applied due to the shaft connection on the same straight line on the measurement result is effectively reduced, and the measurement precision is improved.

Preferably, the driving mechanism 4 is a driving cylinder 41, the driving cylinder 41 is mounted on the gantry via screws, and the driving shaft 42 is a cylinder shaft. Alternatively, the driving mechanism 4 may be a cylinder or a servo-electric cylinder, and the driving shaft 42 may be a cylinder shaft or an electric cylinder shaft.

Preferably, the detecting assembly 6 includes a ball hinge joint 61 connected to the driving shaft 42, an insulating press head 62 mounted on an end of the ball hinge joint 61 away from the driving shaft, and a pressing terminal 63 mounted on an end of the insulating press head 62 away from the ball hinge joint 61, wherein the pressing terminal 63 is engaged with the fixed terminal 7. During detection, the sample to be detected is placed between the pressure applying terminal 63 and the static terminal 7. The multimeter 5 is electrically connected to the voltage application terminal 63 via a wire 51. Preferably, the pressing terminal 63 is a pressing terminal made of a conductive material, and the stationary terminal 7 is a stationary terminal made of a conductive material. Preferably, the pressing terminal 63 is a pressing terminal made of copper, and the stationary terminal 7 is a stationary terminal made of copper. The pressure applying terminal 63 and the static terminal 7 are arranged as electric conductors, so that the detection of the resistance, the leakage current and the package short circuit condition of a sample to be detected is realized during the test. The contact surface of the pressure applying terminal 63 and the sample to be measured and the contact surface of the static terminal 7 and the sample to be measured are 00-level surfaces, and the contact surface of the pressure applying terminal 63 and the sample to be measured is slightly smaller than the contact surface of the static terminal and the sample to be measured, so that shearing of the edge of the pressure applying terminal 63 on the sample can be effectively prevented when the pressure applying terminal is pressed down. The fuel cell detection equipment further comprises a data acquisition system and an environment simulation cavity, the environment simulation cavity is required to be placed in when the fuel cell detection equipment carries out body resistance detection, and the data acquisition system can automatically acquire data of the high-precision digital display ten-thousandth meter 32 and the universal meter 5.

Preferably, the pressure applying terminal 63 is connected to the insulating ram 62 by a countersunk screw, and the stationary terminal 7 is fixed to the base 1 by a countersunk screw. The base may be a marble base. The frame 2 is of an integrated gantry structure and is high in deformation resistance, and the frame is made of marble or metal materials.

As another preferred mode, the frame 2 and the base 1 of the present invention may be formed as a single body. Preferably, the frame 2 and the base 1 are of an integral marble structure, the deformation of the marble material can be reduced to the maximum extent, and the marble material has a low thermal expansion coefficient and does not rust.

The detection process and the principle of the fuel cell detection equipment are as follows:

and (3) thickness detection: when a sample to be detected is not placed, the cylinder shaft of the driving cylinder 41 is adjusted to descend to the position where the pressure applying terminal 63 just contacts the static terminal 7, the number of the ten-thousandth meter 32 is cleared, and the cylinder shaft is lifted up vertically after the clearing; the sample to be measured is placed between the pressure applying terminal 63 and the static terminal 7, the cylinder shaft of the driving cylinder is controlled to be pressed down to be static, and the absolute value of the reading of the decimeter 32 read at the moment is the thickness of the sample to be measured.

And (3) detection of the compression ratio: when the thickness detection of the sample to be detected is completed, the initial thickness value s1 of the sample is recorded. After taking out the sample to be measured, adjust drive actuating cylinder 41 according to control and make the cylinder shaft move down to the sample to be measured to when exerting pressure value 100PSI, clear the registration of ten-thousandths meter 32 this moment (this operation can eliminate mechanical deformation error, improves and detects the precision), and through with the cylinder axial of drive actuating cylinder 41 upwards move to can put into the sample to be measured, control the cylinder shaft to push down to ten-thousandths meter reading is stable, record ten-thousandths meter 32's registration absolute value s2 this moment, then the compressibility C of sample is:

C＝(s1-s2)/s1*100％

resistance detection: samples to be tested of the gas diffusion layer and the bipolar plate are placed between the pressurizing terminal 63 and the stationary terminal 7, the pressurizing terminal 63 is driven to press down by the cylinder shaft of the driving cylinder 41, a pressure value of 100PSI is applied by the driving cylinder 41, a constant current of 5A is applied to the static terminal 7 and the pressurizing terminal 63 by the constant current source at the moment, meanwhile, a multimeter 5 is connected through a lead 51, and the voltage between the static terminal 7 and the pressure applying terminal 63 is measured, the total value of the contact resistance of the sample to be measured and the volume resistance in the vertical plane can be calculated through ohm's law, the volume resistance and the contact resistance of the sample to be measured can be obtained by measuring for a plurality of times and solving the equation according to the volume resistance of the known terminal material, and the pressure value applied by the driving cylinder 41 can be changed, and after measuring the total resistance value of the sample to be measured, calculating the intercept by adopting a mapping method to obtain the volume resistance and the contact resistance value of the sample to be measured.

Detection of leakage current or package short circuit: the sample to be tested of the membrane electrode is placed between the pressure applying terminal 63 and the static terminal 7, the driving cylinder 41 is controlled to drive the pressure applying terminal 63 to be pressed down until the sample to be tested is in good contact with the pressure applying terminal 63 and the static terminal 7, at the moment, the resistance between the pressure applying terminal 63 and the static terminal 7 is measured through the universal meter 5, if the resistance reading of the universal meter 5 is observed to be gradually increased and is increased to 100 ohms within 10 seconds, the membrane electrode leakage current is small or the short circuit phenomenon of the cathode and the anode does not occur in the membrane electrode packaging. If the resistance reading of the universal meter 5 is observed to be small and not increased, the phenomenon that a leak point appears in the membrane electrode package and the anode and cathode are short-circuited is indicated.

Fig. 4 to 7 are combined to show a second embodiment of the present invention, which is used for testing a membrane electrode and a bipolar plate of a fuel cell. The fuel cell detection equipment comprises a base 1, a frame 2 arranged on the base 1, a myriameter component 3 arranged on the frame 2, a driving mechanism 4 arranged on the frame 2 and positioned below the myriameter component 3, an air tightness detection component 8 connected below the driving mechanism 4 and capable of moving along with the driving mechanism 4 in the vertical direction, an air tightness detection bottom plate 9 arranged on the base 1 and matched with the air tightness detection component 8, an air pressure regulating valve 12 and a digital display flowmeter 11, the air pressure regulating valve 12 is communicated with the air tightness detection assembly 8 through an air pipe 10, the digital display flowmeter 11 is communicated with the air tightness detection bottom plate 9 through the air pipe 10, the driving mechanism 4 has a driving shaft 42 capable of being lifted and lowered in the vertical direction, and the air-tightness detecting assembly 8 is connected to the driving shaft 42 and is movable in the vertical direction. The present embodiment is based on the fuel cell testing apparatus described in the first embodiment, the testing unit 6 of the first embodiment is replaced with the air tightness testing unit 8 of the present embodiment, the fixed terminal 7 of the first embodiment is replaced with the air tightness testing base plate 9 of the present embodiment, the universal meter and the lead 51 are replaced with the digital display flow meter 11 and the air pressure regulating valve 12 of the present embodiment, the air pressure regulating valve 12 is communicated with the air tightness testing unit 8 through the air pipe 10, and the digital display flow meter 11 is communicated with the air tightness testing base plate 9.

With reference to the accompanying drawings, the air-tightness detecting assembly 8 includes a ball-and-socket joint 81 connected to the driving shaft 42, an air-tightness detecting head 82 mounted on an end of the ball-and-socket joint 81 away from the driving shaft 42, and a first ventilation plug 83 disposed on the air-tightness detecting head 82, wherein the air-tightness detecting head 82 is engaged with the air-tightness detecting bottom plate 9. And a sealing ring 13 is arranged between the air tightness detection pressure head 82 and the air tightness detection bottom plate 9. The air pressure regulating valve 12 is communicated with the first ventilation plug 83 through an air pipe 10. The air tightness detection bottom plate 9 is provided with a second ventilation plug 91, and the digital display flowmeter 11 is connected with the second ventilation plug 91.

The fuel cell detection device can realize air tightness detection and gas permeability detection of a membrane electrode and a bipolar plate of a fuel cell.

The air tightness detection principle is as follows: the airtightness detection head 82 is attached and the airtightness detection substrate 9 is fixed to the base 1. The sample to be measured is placed between the air tightness detection pressure head 82 and the air tightness detection bottom plate 9 and is installed through the sealing ring 13, the driving shaft 42 of the driving mechanism 4 is controlled to be pressed downwards to enable the air tightness detection pressure head 82 and the air tightness detection bottom plate 9 to be pressed tightly, at the moment, the air inlet pressure of the air tightness detection pressure head 82 is adjusted to be 0.1MPa through adjusting the air pressure adjusting valve 12, and whether the sample to be measured leaks air or not can be judged by observing the indication number of the digital display flow meter 11, namely, if the indication number of the digital display flow meter 11 changes and indicates that the sample to.

The gas transmittance detection principle is as follows: during the air tightness detection, the pressure outlet pressure of the air pressure regulating valve 12 is maintained at 0.1MPa, the accumulated flow value V of the flowmeter is digitally displayed within the testing time t, and the gas transmittance m of the sample to be detected in unit time and unit area can be calculated according to the testing area S of the known air tightness detection pressure head 82 as follows:

m＝V/(S*t)*100％

in summary, with the attached drawings, the present invention provides a fuel cell detection apparatus for detecting a membrane electrode, a gas diffusion layer and a bipolar plate of a fuel cell. During detection, a membrane electrode, a gas diffusion layer and a bipolar plate to be detected are placed between the detection assembly 6 and the static terminal 7, the detection assembly 6 is driven to move downwards through the driving mechanism 4, the matching of the detection assembly 6 and the static terminal 7 is realized, the driving displacement change of the driving mechanism 4 is sensed through the universal meter 32, the detection on the thickness and the compression ratio of the membrane electrode, the gas diffusion layer and the bipolar plate is realized, and the resistance detection meeting and the leakage detection of the membrane electrode, the gas diffusion layer and the bipolar plate are realized by arranging the universal meter 5 to be connected with the detection assembly 6 and the static terminal 7. And the detection assembly 6 and the static terminal 7 are replaced by an air tightness detection assembly 8 and an air tightness detection bottom plate 9, so that the air tightness detection and the gas transmittance detection of the membrane electrode and the bipolar plate can be realized; therefore, the purpose of realizing multifunctional detection of one device is achieved, the purpose of quickly detecting the fuel cell is well met, and the device has the advantages of reliable structure, vivid environmental simulation, simplicity and safety in operation and the like, and a plurality of test functions are integrated on one device, so that the economic cost of the test is saved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. A fuel cell detection device is used for detecting a membrane electrode, a gas diffusion layer and a bipolar plate of a fuel cell, it is characterized by comprising a base, a frame arranged on the base, a myriameter component arranged on the frame, a driving mechanism arranged on the frame and positioned below the myriameter component, a detection component connected below the driving mechanism and capable of moving along the vertical direction of the driving mechanism, a static terminal arranged on the base and matched with the detection component, and a multimeter, the multimeter is respectively electrically connected with the detection assembly and the static terminal through leads, the driving mechanism is provided with a driving shaft which can be lifted in the vertical direction, the myriameter assembly is connected with the driving shaft and senses the movement displacement of the driving shaft in the vertical direction, and the detection assembly is connected with the driving shaft and can move in the vertical direction.

2. The fuel cell testing apparatus according to claim 1, wherein the parts per million meter assembly includes a parts per million meter bracket disposed on the frame, and a parts per million meter mounted on the parts per million meter bracket, and the parts per million meter is connected to the driving shaft.

3. The fuel cell detection device according to claim 2, wherein the rack is a gantry, a through hole for the driving shaft to pass through is formed in the top of the gantry, and the driving shaft passes through the through hole and is connected with the ten-thousandth meter.

4. The fuel cell detection apparatus according to claim 3, wherein the ten-thousandth meter includes a meter head and a detection shaft that is provided in a vertical direction and is connected to the meter head, the detection shaft is connected to the drive shaft, and an axis of the detection shaft and an axis of the drive shaft are on the same straight line.

5. The fuel cell testing apparatus according to claim 3, wherein the driving mechanism is a driving cylinder, the driving cylinder is mounted on the gantry by screws, and the driving shaft is a cylinder shaft.

6. The fuel cell testing apparatus of claim 5, wherein the testing assembly includes a ball-and-socket joint connected to the driving shaft, an insulating ram mounted at an end of the ball-and-socket joint remote from the driving shaft, and a pressure terminal mounted at an end of the insulating ram remote from the ball-and-socket joint, the pressure terminal engaging the stationary terminal.

7. The fuel cell testing apparatus according to claim 6, wherein the press terminal is a press terminal made of a conductive material, and the stationary terminal is a stationary terminal made of a conductive material.

8. The fuel cell testing apparatus according to claim 6, wherein the pressure applying terminal is connected to the insulation head by a countersunk screw, and the stationary terminal is fixed to the base by a countersunk screw.

9. The fuel cell testing apparatus according to claim 6, wherein said multimeter is electrically connected to said voltage application terminal by a wire.

10. The fuel cell testing apparatus according to claim 1, wherein said frame is fixed to said base by screws.

11. A fuel cell detection device is used for detecting a membrane electrode and a bipolar plate of a fuel cell, it is characterized by comprising a base, a frame arranged on the base, a myriameter component arranged on the frame, a driving mechanism arranged on the frame and positioned below the myriameter component, an air tightness detection component connected below the driving mechanism and capable of moving along with the driving mechanism in the vertical direction, an air tightness detection bottom plate arranged on the base and matched with the air tightness detection component, an air pressure regulating valve and a digital display flowmeter, the air pressure regulating valve is communicated with the air tightness detection assembly through an air pipe, the digital display flowmeter is communicated with the air tightness detection bottom plate through an air pipe, the driving mechanism is provided with a driving shaft capable of lifting in the vertical direction, and the air tightness detection assembly is connected with the driving shaft and can move in the vertical direction.

12. The fuel cell testing apparatus of claim 11, wherein the air-tightness testing assembly includes a ball-hinge joint connected to the driving shaft, an air-tightness testing pressure head mounted on an end of the ball-hinge joint away from the driving shaft, and a first ventilation plug disposed on the air-tightness testing pressure head, and the air-tightness testing pressure head is engaged with the air-tightness testing bottom plate.

13. The fuel cell testing apparatus according to claim 12, wherein a seal ring is provided between the airtightness testing head and the airtightness testing base plate.

14. The fuel cell testing apparatus according to claim 12, wherein said air pressure regulating valve is in communication with said first vent plug through an air tube.

15. The fuel cell detection device according to claim 12, wherein a second ventilation plug is provided on the air tightness detection bottom plate, and the digital display flow meter is connected with the second ventilation plug.

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