A proton exchange membrane performance testing device

Abstract

The present invention relates to a proton exchange membrane performance testing device, which can work in a charging state and a discharging state, and is characterized in that it includes an adjustable DC regulated power supply, a liquid flow battery stack, a load and an electrolyte management device; the positive electrode of the adjustable DC regulated power supply is connected to the anode charge and discharge integrated interface of the liquid flow battery stack, and the anode charge and discharge integrated interface of the liquid flow battery stack is also connected to the positive power supply end of the load, and the negative electrode of the adjustable DC regulated power supply is connected to the cathode charge and discharge integrated interface of the liquid flow battery stack, and the cathode charge and discharge integrated interface of the liquid flow battery stack is also connected to the negative power supply end of the load. After adopting the present invention, as long as the proton exchange membrane to be tested is directly installed in the device provided by the present invention, it will not be affected by other processes and auxiliary materials. Therefore, the present invention is not only simple to operate, but also has low technical requirements for detection personnel, and the test is fast, and the test data obtained is also relatively accurate.

Description

Technical Field

[0001] The invention relates to a proton exchange membrane performance testing device, belonging to the technical field of testing devices for fuel cells. Background Art

[0002] With the strong support of governments at all levels, the application of hydrogen energy is rapidly expanding, and hydrogen energy technology is also constantly maturing. Hydrogen energy, as a green, environmentally friendly, and renewable energy source, is completely the ultimate energy goal of mankind. Hydrogen energy has been well applied in fields such as automobile transportation, aerospace, aviation, military submarines, distributed power generation, and emergency backup power supplies. With the continuous expansion of hydrogen energy application areas, the optimization and innovation of the main components of hydrogen energy engines are particularly important. Proton exchange membrane is one of the main components of fuel cell engines, and currently it is basically dependent on imports. Proton exchange membrane is a component of the electrode component in the fuel cell stack. The proton exchange membrane cannot function alone. Therefore, when performing performance testing on the proton exchange membrane, the proton exchange membrane, catalyst, and gas diffusion layer to be tested must be made into a three-in-one electrode through a complex process (the technical requirements are quite difficult) before the performance test is carried out. It basically includes the following steps:

[0003] Step 1: Make a sealing frame on the manufactured three-in-one electrode (MEA) to guide gas flow and seal.

[0004] Step 2: Assemble the three-in-one electrode (MEA) with a sealed frame into a battery stack.

[0005] Step 3: prepare a test bench dedicated to hydrogen fuel cells, and use the test bench to test the battery stack obtained in step 2.

[0006] Step 4: Collect the test data obtained in step 3 and analyze the test results

[0007] It can be seen that the existing proton exchange membrane performance testing process is complex, the testing cost is high, and there are high technical requirements for testers. During the test, the testing cycle is long and the time is slow. More importantly, due to the complex process, process and the influence of many other auxiliary materials (the same performance of proton exchange membrane is different under different auxiliary material manufacturing processes), the accuracy of the data obtained by the existing proton exchange membrane testing method is questionable, and the test data obtained is often not accurate. Summary of the invention

[0008] The technical problem to be solved by the present invention is that the existing proton exchange membrane performance detection process is complex and the detection cost is high.

[0009] In order to solve the above technical problems, the technical solution of the present invention is to provide a proton exchange membrane performance testing device, which can work in a charging state and a discharging state, and is characterized in that it includes an adjustable DC regulated power supply, a liquid flow battery single stack, a load and an electrolyte management device, wherein the liquid flow battery single stack has an anode electrolyte inlet, an anode electrolyte reflux port, a cathode electrolyte inlet, a cathode electrolyte reflux port, a cathode charge and discharge integrated interface, and an anode charge and discharge integrated interface; the anode electrolyte inlet, the anode electrolyte reflux port, the cathode electrolyte inlet, and the cathode electrolyte reflux port of the liquid flow battery single stack are connected to the electrolyte management device The positive electrode of the adjustable DC regulated power supply is connected to the anode charge and discharge integrated interface of the liquid flow battery single stack, and the anode charge and discharge integrated interface of the liquid flow battery single stack is also connected to the positive power supply end of the load, and the negative electrode of the adjustable DC regulated power supply is connected to the cathode charge and discharge integrated interface of the liquid flow battery single stack, and the cathode charge and discharge integrated interface of the liquid flow battery single stack is also connected to the negative power supply end of the load, wherein:

[0010] The single flow battery stack further includes an anode mechanism having an anode electrolyte inlet, an anode electrolyte reflux port and an anode charge and discharge integrated interface, and a cathode mechanism having a cathode electrolyte inlet, a cathode electrolyte reflux port and a cathode charge and discharge integrated interface. After the proton exchange membrane to be tested is clamped between the anode mechanism and the cathode mechanism, the anode mechanism, the cathode mechanism and the proton exchange membrane to be tested are assembled into a whole using battery stack fasteners.

[0011] Preferably, the adjustable DC regulated power supply adopts a DC regulated power supply with adjustable and controllable voltage and current and a constant current or constant voltage output function; the adjustable DC regulated power supply is configured according to the voltage and current required for charging the single flow battery stack.

[0012] Preferably, the electrolyte management device comprises a 24V power supply, an anode electrolyte storage tube, a cathode electrolyte storage tube, an anode DC pump and a cathode DC pump;

[0013] The anode electrolyte storage tube and the cathode electrolyte storage tube store an anode electrolyte and a cathode electrolyte respectively; the anode electrolyte storage tube is connected to the anode electrolyte return port of the flow battery stack through an electrolyte pipeline on the one hand, and is connected to the anode electrolyte inlet of the flow battery stack through an electrolyte pipeline via an anode DC pump on the other hand;

[0014] The cathode electrolyte storage tube is connected to the cathode electrolyte reflux port of the liquid flow battery stack through an electrolyte pipeline on the one hand, and is connected to the cathode electrolyte inlet of the liquid flow battery stack through an electrolyte pipeline via a cathode DC pump on the other hand.

[0015] Preferably, the electrolyte management device also includes a device assembly base plate, and the 24V power supply, the anode electrolyte storage tube, the cathode electrolyte storage tube, the anode DC pump, the cathode DC pump and the electrolyte pipeline are firmly fixed on the device assembly base plate.

[0016] Preferably, the 24V power supply, the anode electrolyte storage tube, the cathode electrolyte storage tube, the anode DC pump, the cathode DC pump and the electrolyte pipeline are made of anti-corrosion materials.

[0017] Preferably, the anode mechanism and the cathode mechanism have the same structure.

[0018] Preferably, the direction facing the proton exchange membrane is defined as the inside, and the direction facing away from the proton exchange membrane is defined as the outside, then the anode mechanism or the cathode mechanism comprises an end plate and a diverter plate buckled thereon on the inner side of the end plate; the diverter plate is provided with a rectangular hole of a size adapted to the carbon felt, and a group of diverter components are respectively provided on the left and right sides of the inner side of the diverter plate at the rectangular hole; the diverter plate is provided with a cathode electrolyte inlet and a cathode electrolyte outlet; a sealing ring 1 is provided along the edge of the rectangular hole on the outer side of the diverter plate, a sealing ring 2 is provided along the edge of the electrolyte inlet, and a sealing ring 3 is provided along the edge of the electrolyte outlet, and after the end plate and the diverter plate are buckled with each other, the contact surfaces of the end plate and the diverter plate are sealed by the sealing ring 1, the sealing ring 2 and the sealing ring 3, so as to prevent the cathode electrolyte or the anode electrolyte from overflowing from the gap between the contact surface of the end plate and the diverter plate;

[0019] After the end plate and the diverter plate are buckled with each other, the electrolyte inlet on the diverter plate is connected with the cathode electrolyte inlet or the anode electrolyte inlet on the end plate via the electrolyte flow channel 1 inside the end plate, and the electrolyte outlet on the diverter plate is connected with the cathode electrolyte reflux port or the anode electrolyte reflux port on the end plate via the electrolyte flow channel 2 inside the end plate; the cathode electrolyte or anode electrolyte exiting the electrolyte management device enters the cathode mechanism or the anode mechanism via the cathode electrolyte inlet or the anode electrolyte inlet, and then flows to the diverter assembly located on one side of the carbon felt via the cathode electrolyte inlet or the anode electrolyte inlet on the diverter plate, and the cathode electrolyte or anode electrolyte is guided by the carbon felt to the diverter assembly on the other side thereof, and then flows out of the cathode mechanism or the anode mechanism via the electrolyte outlet and the cathode electrolyte reflux port or the anode electrolyte reflux port, and then flows back to the electrolyte management device;

[0020] The carbon felt, the first carbon paper, the current collecting plate, the second carbon paper and the guide plate are sequentially stacked from the inside to the outside in the installation space formed by the end plate and the diverter plate being buckled together;

[0021] The carbon felt is located in the rectangular hole of the diverter plate, and the carbon felt is always in close contact with the proton exchange membrane to be tested, the current collecting plate, and the carbon paper;

[0022] The current collecting plate is used to prevent the cathode electrolyte or the anode electrolyte from directly contacting the guide plate; when the proton exchange membrane performance test device is working in a charging state, the cathode current or the anode current introduced by the guide plate is collected by the current collecting plate and conducted to the carbon felt; when the proton exchange membrane performance test device is working in a discharging state, the cathode current or the anode current released by the cathode electrolyte or the anode electrolyte is collected by the current collecting plate;

[0023] The guide plate provides the cathode charge-discharge integrated interface or the anode charge-discharge integrated interface to the outside; when the proton exchange membrane performance test device works in a charging state, the guide plate collects the cathode current or the anode current from the adjustable DC regulated power supply; when the proton exchange membrane performance test device works in a discharging state, the guide plate guides the cathode current or the anode current collected by the current collecting plate to the load;

[0024] The proton exchange membrane to be tested is sandwiched between the carbon felt of the anode mechanism and the carbon felt of the cathode mechanism.

[0025] Preferably, there is a sealing ring four on the inner side of the diverter plate of the cathode mechanism or the diverter plate of the anode mechanism, and the diverter assembly and the carbon felt are both in the area surrounded by the sealing ring four; the contact surface between the diverter plate of the cathode mechanism and the diverter plate of the anode mechanism is sealed by the sealing ring four, and the size of the proton exchange membrane to be tested matches the size of the sealing ring four.

[0026] Preferably, four groups of the stack fasteners are respectively inserted into four corners of the anode mechanism and the cathode mechanism, so as to fasten the anode mechanism, the cathode mechanism and the proton exchange membrane to be tested together.

[0027] After adopting the present invention, there is no need to make a three-in-one electrode, nor is there any need for other auxiliary material combinations. The proton exchange membrane to be tested only needs to be directly installed in the device provided by the present invention, so it is not affected by other processes and auxiliary materials. Therefore, the present invention is not only simple to operate, but also has low technical requirements for detection personnel, and the test is fast, and the test data obtained is also more accurate. The present invention has a reasonable structure, is simple and easy to understand, is easy to operate, and has high data accuracy. It is an auxiliary device in the research and development of proton exchange membranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1It is a schematic diagram of the overall structure of the present invention (front view);

[0029] Figure 2 It is a schematic diagram of the overall structure of the present invention (rear view);

[0030] Figure 3 It is a schematic diagram of a liquid flow stack of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the electrolyte management device of the present invention;

[0032] Figure 5 It is a schematic diagram of the distribution of parts of the present invention;

[0033] Fig. 6A This is a rendering of the liquid flow battery of the present invention;

[0034] Figure 6B for Fig. 6A AA section view. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the present invention equally.

[0036] like Figure 1 As shown, a proton exchange membrane performance test device disclosed in this embodiment includes: an adjustable DC regulated power supply 1, a liquid flow battery stack 2, a load 3, an electrolyte management device 4 and a 220V power supply 5. The purpose of the present invention is to use the operation of the liquid flow battery stack 3 to measure the performance indicators of other materials such as proton exchange membranes, and provide accurate performance data for the research and development of proton exchange membranes.

[0037] The adjustable DC regulated power supply 1 refers to a DC regulated power supply with adjustable and controllable voltage and current and a constant current or constant voltage output function. The adjustable DC regulated power supply 1 should be configured according to the voltage and current required for the charging requirements of the flow battery stack 2. The load 3 should match the output of the flow battery stack 2. In this embodiment, the discharge current of the flow battery stack 2 is 0 to 20A and the voltage is 0 to 2V. The load 3 is a micro load with a voltage range of 0.5V to 2V and a current range of 0.5A to 20A.

[0038] In this embodiment, combined with Figure 2 and Figure 4In this embodiment, the electrolyte management device includes: a 24V power supply 27, an anode electrolyte storage tube 28-1, a cathode electrolyte storage tube 28-2, an anode DC pump 29-1, a cathode DC pump 29-2, an electrolyte pipeline and a device assembly base plate 30.

[0039] According to the spatial layout, the installation and fixing positions are reasonably designed, and the 24V power supply 27, the anode electrolyte storage tube 28-2, the cathode electrolyte storage tube 28-1, the anode DC pump 29-2, the cathode DC pump 29-1 and the electrolyte pipeline are firmly fixed on the device assembly bottom plate 30. In order to prevent corrosion due to leakage of electrolyte, the 24V power supply 27, the anode electrolyte storage tube 28-2, the cathode electrolyte storage tube 28-1, the anode DC pump 29-2, the cathode DC pump 29-1 and the electrolyte pipeline are made of anti-corrosion plates, such as PVC, PP or PE.

[0040] In this embodiment, the anode electrolyte storage tube 28-2 and the cathode electrolyte storage tube 28-1 store electrolyte in advance. The anode electrolyte storage tube 28-2 is connected to the anode electrolyte return port 31-2 of the liquid flow battery single stack 2 on the one hand, and is connected to the anode electrolyte inlet 32-2 of the liquid flow battery single stack 2 via the anode DC pump 29-2 on the other hand. The cathode electrolyte storage tube 28-1 is connected to the cathode electrolyte return port 31-1 of the liquid flow battery single stack 2 on the one hand, and is connected to the cathode electrolyte inlet 32-1 of the liquid flow battery single stack 2 via the cathode DC pump 29-1. A reflux port 33 is provided on the cathode electrolyte storage tube 28-1 and the anode electrolyte storage tube 28-2 respectively. The cathode DC pump 29-1 and the anode DC pump 29-2 are respectively connected to the cathode electrolyte inlet 32-1 and the anode electrolyte inlet 32-2 of the flow battery single stack 2 through their respective liquid outlets 34 through their respective independent electrolyte pipelines.

[0041] Combination Figure 3 , Figure 5 , Fig. 6A and Figure 6B In this embodiment, the flow battery single stack 2 includes an anode mechanism, a cathode mechanism and a proton exchange membrane 25 to be tested. The proton exchange membrane 25 is clamped between the anode mechanism and the cathode mechanism. In this embodiment, the direction facing the proton exchange membrane 25 is defined as "inside", and the direction facing away from the proton exchange membrane 25 is defined as "outside", then:

[0042] The cathode mechanism includes a cathode end plate 14 and a cathode shunt plate 26 buckled on the inner side of the cathode end plate 14. The cathode end plate 14 can be made of insulating materials such as PE, PVC, PP epoxy, etc. There is a rectangular hole on the cathode shunt plate 26, the size of which is adapted to the cathode carbon felt 23, and a shunt component 26-1 is provided on the inner side of the cathode shunt plate 26 on the left and right sides of the rectangular hole. There is a cathode electrolyte inlet 26-2 and a cathode electrolyte outlet 26-3 on the cathode shunt plate 26. A sealing ring 1 21 is provided along the edge of the rectangular hole on the outer side of the cathode shunt plate 26, a sealing ring 20 is provided along the edge of the cathode electrolyte inlet 26-2, and a sealing ring 3 22 is provided along the edge of the cathode electrolyte outlet 26-3. The cathode end plate 14 is provided with sealing ring installation grooves corresponding to the sealing ring 1 21, the sealing ring 20 and the sealing ring 3 22, respectively, so that after the cathode end plate 14 and the cathode shunt plate 26 are buckled together, the contact surfaces of the cathode end plate 14 and the cathode shunt plate 26 are sealed by the sealing ring 1 21, the sealing ring 20 and the sealing ring 3 22. The functions of the sealing ring 1 21, the sealing ring 20 and the sealing ring 3 22 are to seal the cathode electrolyte in the electrolyte flow channel, and prevent the cathode electrolyte from overflowing from the gap between the contact surfaces of the cathode end plate 14 and the cathode shunt plate 26, causing the cathode electrolyte to leak out and corrode the cathode guide plate 13.

[0043] After the cathode end plate 14 and the cathode diverter plate 26 are buckled together, the cathode electrolyte inlet 26-2 on the cathode diverter plate 26 is connected to the cathode electrolyte inlet 32-1 on the cathode end plate 14 via the electrolyte flow channel 1 inside the cathode end plate 14; the cathode electrolyte outlet 26-3 on the cathode diverter plate 26 is connected to the cathode electrolyte reflux port 31-1 on the cathode end plate 14 via the electrolyte flow channel 2 inside the cathode end plate 14. After the cathode electrolyte exiting the cathode electrolyte storage tube 28-1 enters the cathode mechanism through the cathode electrolyte inlet 26-2, it flows to the shunt component 26-1 located on one side of the cathode carbon felt 23 through the cathode electrolyte inlet 26-2 on the cathode shunt plate 26. The cathode carbon felt 23 guides the cathode electrolyte to the shunt component 26-1 on the other side thereof, and then it flows out of the cathode mechanism through the cathode electrolyte outlet 26-3 and the cathode electrolyte reflux port 31-1, and then flows back to the cathode electrolyte storage tube 28-1.

[0044] The cathode carbon felt 23, cathode carbon paper 1 15, cathode current collecting plate 18, cathode carbon paper 2 and cathode guide plate 13 are sequentially stacked from inside to outside in the installation space formed by the cathode end plate 14 and the cathode shunt plate 26 being buckled together.

[0045] The cathode carbon felt 23 is located in the rectangular hole of the cathode shunt plate 26, which plays the role of cathode electrolyte diversion, providing reaction space and conductivity for the cathode electrolyte participating in the reaction. The thickness of the cathode carbon felt 23 must ensure that it is in close contact with the proton exchange membrane 25 to be tested, the cathode current collector 18, and the cathode carbon paper 15, reducing contact resistance and increasing power generation efficiency.

[0046] The cathode current collector 18 serves to prevent the cathode electrolyte from directly contacting the cathode guide plate 13, thereby protecting the cathode guide plate 13 from being corroded by the cathode electrolyte. When the liquid flow battery stack 2 is charged, the cathode current introduced by the cathode guide plate 13 is collected by the cathode current collector 18 and conducted to the cathode carbon felt 23. When the liquid flow battery stack 2 is discharged, the cathode current released by the cathode electrolyte is collected by the cathode current collector 18.

[0047] The cathode guide plate 13 is made of copper plate and is treated with anti-corrosion, generally gold-plated, which can prevent corrosion and increase the conductivity. When the flow battery stack 2 is charged, the cathode current from the adjustable DC voltage-stabilized power supply 1 is collected by the cathode guide plate 13. When the flow battery stack 2 is discharged, the cathode current collected by the cathode current collecting plate 18 is conducted to the load 3 by the cathode guide plate 13.

[0048] The function of cathode carbon paper 15 is to increase the contact area between cathode carbon felt 23 and cathode current collecting plate 18, so as to achieve good conductive effect. The function of cathode carbon paper 2 is to increase the contact area between cathode current collecting plate 18 and cathode current guide plate 13, so as to achieve good conductive effect.

[0049] The anode mechanism includes an anode end plate 10, an anode guide plate 11, an anode carbon paper 2, an anode current collecting plate 12, an anode carbon paper 16, an anode carbon felt 24, an anode diverter plate 17 and other components. Its structure and working principle are the same as those of the cathode mechanism and will not be repeated here.

[0050] There is a sealing ring 435 on the inner side of the cathode shunt plate 26 or the anode shunt plate 17, which encloses the shunt assembly and the anode carbon felt 24 or the cathode carbon felt 23 in the area surrounded by the sealing ring 435. After the anode mechanism and the cathode mechanism are assembled, the proton exchange membrane 25 to be tested is clamped between the anode carbon felt 24 and the cathode carbon felt 23. At this time, the contact surface between the cathode shunt plate 26 and the anode shunt plate 17 is sealed by the sealing ring 435, and the size of the proton exchange membrane 25 to be tested matches the size of the sealing ring 435. Then, four groups of stack fasteners are inserted into the four corners of the anode mechanism and the cathode mechanism respectively to fasten the anode mechanism, the cathode mechanism and the proton exchange membrane 25 to be tested together. Each group of stack fasteners includes a stud 6, a nut 7, a spring washer 8 and a flat washer 9.

[0051] The performance data of the proton exchange membrane 25 during the charge and discharge operation of the device provided by the present invention is collected to judge its performance. The specific operation method is as follows:

[0052] Step 1: Charging:

[0053] Step 101, turn on the 24V power supply 27, and start the operation of the anolyte, the cathode electrolyte, the anode DC pump 29-2, and the cathode DC pump 29-1. At this time, the anolyte and the cathode electrolyte begin to circulate.

[0054] Step 102, turn on the adjustable DC regulated power supply 1, adjust the voltage to 1.6V, and start charging normally. This charging process is constant voltage charging. During the charging process, the charging current will continue to decrease until it drops to 0, indicating that charging is complete.

[0055] Step 2: Discharge:

[0056] Step 201: turn off the adjustable DC regulated power supply 1, turn on the load 3 and start discharging.

[0057] Step 202: Control the discharge voltage and current.

[0058] Data recording is performed during the above process, including:

[0059] 1) Charging record: record the charging voltage and current at the beginning of charging.

[0060] Charging time record: the time from the start of charging to the end of charging.

[0061] 2) Discharge record: record the voltage and current at the beginning of discharge.

[0062] Discharge duration record: the time from the start of discharge to the end of discharge.

[0063] Step 3, test result summary: Determine the charge and discharge efficiency of the proton exchange membrane 25 based on the above data, including: voltage efficiency, current efficiency, and capacity efficiency.

[0064] The present invention directly omits all the intermediate links in the existing detection method, and directly installs the proton exchange membrane to be tested into the device provided by the present invention for operation. Because there are no intermediate links, the detection data obtained by the device provided by the present invention is accurate and error-free, providing fast, accurate and effective data for the research and development of proton exchange membranes.

Claims

1. A proton exchange membrane performance testing device, which can work in charging state and discharging state, characterized in that: It includes an adjustable DC voltage-regulated power supply, a single flow battery stack, a load, and an electrolyte management device, wherein the single flow battery stack has an anode electrolyte inlet, an anode electrolyte reflux port, a cathode electrolyte inlet, a cathode electrolyte reflux port, a cathode charge-discharge integrated interface, and an anode charge-discharge integrated interface; the anode electrolyte inlet, anode electrolyte reflux port, cathode electrolyte inlet, and cathode electrolyte reflux port of the single flow battery stack are connected to the electrolyte management device, and is composed of an anode electrolyte inlet, an anode electrolyte reflux port, and an electrolyte management device. The anode electrolyte circulation supply circuit is composed of a cathode electrolyte inlet, a cathode electrolyte reflux port and an electrolyte management device to form a cathode electrolyte circulation supply circuit; the positive electrode of the adjustable DC regulated power supply is connected to the anode charge and discharge integrated interface of the liquid flow battery single stack, and the anode charge and discharge integrated interface of the liquid flow battery single stack is also connected to the positive power supply end of the load, and the negative electrode of the adjustable DC regulated power supply is connected to the cathode charge and discharge integrated interface of the liquid flow battery single stack, and the cathode charge and discharge integrated interface of the liquid flow battery single stack is also connected to the negative power supply end of the load, wherein: The flow battery single stack further includes an anode mechanism having an anode electrolyte inlet, an anode electrolyte return port, and an anode charge-discharge integrated interface, and a cathode mechanism having a cathode electrolyte inlet, a cathode electrolyte return port, and a cathode charge-discharge integrated interface. After the proton exchange membrane to be tested is clamped between the anode mechanism and the cathode mechanism, the anode mechanism, the cathode mechanism, and the proton exchange membrane to be tested are assembled into a whole using a battery stack fastener; The electrolyte management device includes a 24V power supply, an anode electrolyte storage tube, a cathode electrolyte storage tube, an anode DC pump and a cathode DC pump; The anode electrolyte storage tube and the cathode electrolyte storage tube store an anode electrolyte and a cathode electrolyte respectively; the anode electrolyte storage tube is connected to the anode electrolyte return port of the flow battery stack through an electrolyte pipeline on the one hand, and is connected to the anode electrolyte inlet of the flow battery stack through an electrolyte pipeline via an anode DC pump on the other hand; The cathode electrolyte storage tube is connected to the cathode electrolyte return port of the flow battery stack through the electrolyte pipeline on the one hand, and is connected to the cathode electrolyte inlet of the flow battery stack through the electrolyte pipeline via the cathode DC pump on the other hand; The anode mechanism has the same structure as the cathode mechanism; The direction facing the proton exchange membrane is defined as the inside, and the direction facing away from the proton exchange membrane is defined as the outside, then the anode mechanism or the cathode mechanism includes an end plate and a diverter plate buckled thereon on the inner side of the end plate; the diverter plate is provided with a rectangular hole of a size adapted to the carbon felt, and a group of diverter components are respectively provided on the left and right sides of the inner side of the diverter plate on the rectangular hole; the diverter plate is provided with a cathode electrolyte inlet and a cathode electrolyte outlet; a sealing ring 1 is provided along the edge of the rectangular hole on the outer side of the diverter plate, a sealing ring 2 is provided along the edge of the electrolyte inlet, and a sealing ring 3 is provided along the edge of the electrolyte outlet, and after the end plate and the diverter plate are buckled with each other, the contact surfaces of the end plate and the diverter plate are sealed by the sealing ring 1, the sealing ring 2 and the sealing ring 3, so as to prevent the cathode electrolyte or the anode electrolyte from overflowing from the gap between the contact surface of the end plate and the diverter plate; After the end plate and the diverter plate are buckled with each other, the electrolyte inlet on the diverter plate is connected with the cathode electrolyte inlet or the anode electrolyte inlet on the end plate via the electrolyte flow channel 1 inside the end plate, and the electrolyte outlet on the diverter plate is connected with the cathode electrolyte reflux port or the anode electrolyte reflux port on the end plate via the electrolyte flow channel 2 inside the end plate; the cathode electrolyte or anode electrolyte exiting the electrolyte management device enters the cathode mechanism or the anode mechanism via the cathode electrolyte inlet or the anode electrolyte inlet, and then flows to the diverter assembly located on one side of the carbon felt via the cathode electrolyte inlet or the anode electrolyte inlet on the diverter plate, and the cathode electrolyte or anode electrolyte is guided by the carbon felt to the diverter assembly on the other side thereof, and then flows out of the cathode mechanism or the anode mechanism via the electrolyte outlet and the cathode electrolyte reflux port or the anode electrolyte reflux port, and then flows back to the electrolyte management device; The carbon felt, the first carbon paper, the current collecting plate, the second carbon paper and the guide plate are sequentially stacked from the inside to the outside in the installation space formed by the end plate and the diverter plate being buckled together; The carbon felt is located in the rectangular hole of the diverter plate, and the carbon felt is always in close contact with the proton exchange membrane to be tested, the current collecting plate, and the carbon paper; The current collecting plate is used to prevent the cathode electrolyte or the anode electrolyte from directly contacting the guide plate; when the proton exchange membrane performance test device is working in a charging state, the cathode current or the anode current introduced by the guide plate is collected by the current collecting plate and conducted to the carbon felt; when the proton exchange membrane performance test device is working in a discharging state, the cathode current or the anode current released by the cathode electrolyte or the anode electrolyte is collected by the current collecting plate; The guide plate provides the cathode charge-discharge integrated interface or the anode charge-discharge integrated interface to the outside; when the proton exchange membrane performance test device works in a charging state, the guide plate collects the cathode current or the anode current from the adjustable DC regulated power supply; when the proton exchange membrane performance test device works in a discharging state, the guide plate guides the cathode current or the anode current collected by the current collecting plate to the load; The proton exchange membrane to be tested is sandwiched between the carbon felt of the anode mechanism and the carbon felt of the cathode mechanism.

2. A proton exchange membrane performance testing device as claimed in claim 1, characterized in that: The adjustable DC regulated power supply adopts a DC regulated power supply with adjustable and controllable voltage and current and a constant current or constant voltage output function; the adjustable DC regulated power supply is configured according to the voltage and current required for the charging requirements of the single flow battery stack.

3. A proton exchange membrane performance testing device as claimed in claim 1, characterized in that: The electrolyte management device also includes a device assembly base plate, and the 24V power supply, the anode electrolyte storage tube, the cathode electrolyte storage tube, the anode DC pump, the cathode DC pump and the electrolyte pipeline are firmly fixed on the device assembly base plate.

4. A proton exchange membrane performance testing device as claimed in claim 3, characterized in that: The 24V power supply, the anode electrolyte storage tube, the cathode electrolyte storage tube, the anode DC pump, the cathode DC pump and the electrolyte pipeline are made of anti-corrosion materials.

5. A proton exchange membrane performance testing device as claimed in claim 1, characterized in that: There is a sealing ring four on the inner side of the diverter plate of the cathode mechanism or the diverter plate of the anode mechanism, and the diverter assembly and the carbon felt are both in the area surrounded by the sealing ring four; the contact surface between the diverter plate of the cathode mechanism and the diverter plate of the anode mechanism is sealed by the sealing ring four, and the size of the proton exchange membrane to be tested matches the size of the sealing ring four.

6. A proton exchange membrane performance testing device as claimed in claim 1, characterized in that: Four groups of the stack fasteners are respectively inserted into the four corners of the anode structure and the cathode structure, so as to fasten the anode structure, the cathode structure and the proton exchange membrane to be tested together.

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