Membrane electrode off-line activation test piece based on electrochemical hydrogen pump and activation device

Abstract

The utility model relates to the field of fuel cells, and provides a membrane electrode off-line activation test piece and an activation device based on an electrochemical hydrogen pump, the membrane electrode off-line activation test piece comprises an upper end plate, an upper collector plate, a lower collector plate, a lower end plate and a plurality of membrane electrode units, the upper end plate, the upper collector plate, the membrane electrode unit, the lower collector plate and the lower end plate are sequentially stacked; the upper end plate, the upper collector plate, the gas distribution plate, the lower collector plate and the lower end plate are all provided with vent holes, and the vent holes are communicated to form a ventilation channel; the membrane electrode unit comprises a membrane electrode and gas distribution plates arranged on the two sides of the membrane electrode, the two sides of each gas distribution plate are each provided with a flow channel area, the flow channel areas are communicated with the ventilation channels, and gas enters the membrane electrode from the flow channel areas. The device has the advantages of simple structure, simplicity and convenience in batch activation of membrane electrodes and high activation efficiency.

Description

Technical Field

[0001] The utility model relates to the field of fuel cells, and more specifically to a membrane electrode offline activation test piece and an activation device based on an electrochemical hydrogen pump. Background Art

[0002] Fuel cells, as a clean and efficient energy conversion technology, rely on electrochemical reactions at the membrane electrode (MEA) interface. The membrane electrode, as the core component of the fuel cell, needs to be activated before it is put into practical use. This is because the initial electrode material and structure usually need further regulation to optimize the catalytic activity, material transfer capacity and three-phase reaction interface of the membrane electrode so that it can achieve optimal performance during operation. Among the many activation methods of fuel cell membrane electrodes, electrochemical hydrogen pump is a very promising activation method because it can save time and hydrogen costs, increase catalyst utilization and battery performance. This method uses the principle of electrochemistry to pass humidified hydrogen into the anode, humidified inert gas or no ventilation into the cathode, and apply voltage or current at both ends of the fuel cell to oxidize the hydrogen at the anode into hydrogen ions, which are reduced to hydrogen through the proton exchange membrane to the cathode.

[0003] CN200610090751.2 discloses a fuel cell membrane electrode activation method using an electrochemical hydrogen pump. The patent introduces water into the cathode side of the membrane electrode, so that the water plays a certain sealing role, so that the hydrogen generated by the cathode produces a certain resistance in the process of outward diffusion, opens the closed pores and semi-closed pores in the catalyst layer, and makes the pore structure of the membrane electrode more connected. CN202310800150.X discloses a fuel cell stack rapid activation method combining electrochemical humidification and electrochemical hydrogen pump, which can improve the catalyst layer structure, activate the catalyst activity, remove impurities and oxides on the catalyst surface, and open the proton conduction channel, so that the fuel cell performance is restored.

[0004] Although the above electrochemical hydrogen pump methods have good activation effects, they require different gas atmospheres to be introduced into the anode and cathode, making the device structure and operation complicated. In addition, although the stack structure can realize the activation treatment of multiple membrane electrodes, the stacking requires the assembly of each component, resulting in a complicated stacking process, time-consuming and labor-intensive, and low production efficiency. Therefore, a simple and mass-producible membrane electrode activation device is urgently needed. Utility Model Content

[0005] The utility model aims to overcome at least one defect (deficiency) of the above-mentioned prior art and provides a membrane electrode offline activation test piece and an activation device based on an electrochemical hydrogen pump, which has a simple structure and is easy to operate for batch activation.

[0006] One purpose of the utility model is to provide a membrane electrode offline activation specimen based on an electrochemical hydrogen pump, comprising an upper end plate, an upper current collecting plate, a lower current collecting plate, a lower end plate and a plurality of membrane electrode units, wherein the upper end plate, the upper current collecting plate, the membrane electrode unit, the lower current collecting plate and the lower end plate are stacked in sequence; the upper end plate, the upper current collecting plate, the gas distribution plate, the lower current collecting plate and the lower end plate are all provided with air holes, and the air holes are connected to form air channels; the membrane electrode unit comprises a membrane electrode and a gas distribution plate arranged on both sides of the membrane electrode, and flow channel areas are provided on both sides of the gas distribution plate, and the flow channel areas are connected to the air channels, and the gas enters the membrane electrode from the flow channel areas.

[0007] In the present technical solution, the upper end plate and the lower end plate are used to facilitate the clamping and fixing of the various layers of the activated specimen, while protecting the current collecting plate. During activation, the various layers of the activated specimen are in close contact; the current collecting plate is a component connected to the power supply during the electrochemical hydrogen pump process, and the gas distribution plate is used to distribute the guide gas, conduct electricity, and support the membrane electrode to be activated. The gas enters the air channel from the air holes of the end plate, enters the flow channel area from the air channel, and then enters the membrane electrode from the flow channel area for activation. Excess hydrogen and hydrogen generated by the cathode of the membrane electrode are also discharged from the air channel.

[0008] The number of membrane electrode units in the middle of the activation specimen of this scheme can be adjusted according to the activation requirements, that is, when multiple membrane electrodes need to be activated at the same time, multiple corresponding number of membrane electrode units can be added in the middle of the activation specimen of this scheme, so as to realize batch activation of membrane electrodes and improve activation efficiency. During activation, the membrane electrode only needs to be placed between two gas distribution plates, and the activation specimen has a simple structure and is easy to operate.

[0009] Furthermore, every two gas distribution plates are connected via an elastic component, and a placement position for accommodating the elastic component is provided on the gas distribution plate, and the distance between the two gas distribution plates is controlled by the expansion and contraction of the elastic component.

[0010] In the technical solution, the elastic component is a structure connected to the placement position, and the placement position is a structure that can completely accommodate the elastic component when it is contracted. Before activation, the elastic component is stretched out, and the activated membrane electrode is placed between the two gas distribution plates, and then the upper and lower end plates are pressed to shrink the elastic component into the placement position. This arrangement fixes the relative position of the gas distribution plates and makes it easy to take and place the membrane electrode. The placement position can accommodate the elastic component and also ensures the sealing between the two gas distribution plates during activation to prevent gas leakage.

[0011] Furthermore, it also includes a pressure-receiving mechanism and a pressure-applying mechanism, wherein the pressure-receiving mechanism is connected to the upper end plate and the lower end plate, and the pressure-applying mechanism applies pressure to the upper end plate and the lower end plate through the pressure-receiving mechanism.

[0012] In the present technical solution, the arrangement of the pressure mechanism facilitates the application of pressure to the end plate and also increases the pressure clamping strength to ensure sealing. The pressure mechanism presses the various layers of the activated specimen by pressing the pressure mechanism.

[0013] Furthermore, the flow channel area includes a plurality of connected straight flow channels.

[0014] In the technical solution, the straight-through flow channel is a straight-line flow channel with a simple structure and easy processing. Compared with the curved flow channel, the straight flow channel shortens the gas flow distance, accelerates the gas flow, and improves the activation efficiency. At the same time, the setting of the straight flow channel also reduces the pressure loss of the inlet and outlet.

[0015] Furthermore, the flow channel areas on both sides of the gas distribution plate are interconnected.

[0016] In this technical solution, the flow channel areas on both sides of the gas distribution plate are connected so that the hydrogen generated by the cathode of the upper membrane electrode can reach the anode of the lower membrane electrode through the flow channel, thereby reducing the amount of hydrogen introduced and saving costs.

[0017] Furthermore, a sealing ring is provided at the edge of the gas distribution plate, and the vent hole and the flow channel area are arranged inside the sealing ring.

[0018] In the technical solution, the provision of the sealing ring makes the contact between two adjacent gas distribution plates closer, thereby preventing gas leakage and improving the sealing performance.

[0019] Furthermore, the upper end plate, the upper current collecting plate, the gas distribution plate, the lower current collecting plate and the lower end plate are each provided with four ventilation holes.

[0020] In this technical solution, the four vents on each plate together form four air channels, thereby improving the activation efficiency of the membrane electrode.

[0021] Furthermore, it also includes a fastening mechanism, the upper end plate, the upper collecting plate, the gas distribution plate, the lower collecting plate and the lower end plate are square, and fixing holes are provided at the four corners, and the fastening mechanism matches the fixing holes.

[0022] In this technical solution, the position and size of the fixing holes on each plate are set accordingly. During the activation process, after the pressure mechanism applies pressure, each plate layer structure reaches a sealed state, and the fastening mechanism cooperates with the fixing holes to lock each layer of the plate to prevent the pressure mechanism from accidentally releasing pressure and causing hydrogen leakage, so as to ensure the smooth progress of the activation.

[0023] Another object of the utility model is to provide a membrane electrode offline activation device based on an electrochemical hydrogen pump, the activation device comprising a gas supply pipeline, a gas exhaust pipeline, a gas circulation pipeline, an external power supply and any one of the above-mentioned membrane electrode offline activation specimens, the gas supply pipeline is connected to the air vents of the upper end plate, the gas exhaust pipeline is connected to the air vents of the lower end plate, the gas circulation pipeline is connected to the gas supply pipeline and the gas exhaust pipeline, and the external power supply is electrically connected to the upper collecting plate and the lower collecting plate.

[0024] Furthermore, the gas supply pipeline is provided with a first gate valve, the gas discharge pipeline is provided with a second gate valve, the gas circulation pipeline is provided with a gas circulation pump and a humidification system; the humidification system is provided between the gas circulation pump and the fourth gate valve;

[0025] The first gate valve is arranged at a side of the connection end of the gas circulation pipeline and the gas supply pipeline away from the membrane electrode offline activation test piece;

[0026] The second gate valve is arranged at a side of the connection end between the gas circulation pipeline and the gas exhaust pipeline away from the membrane electrode offline activation specimen;

[0027] Compared with the prior art, the beneficial effects of the utility model are:

[0028] (1) The activation specimen of the utility model has a simple structure and does not require assembly of the stack structure. It only needs to place the membrane electrode to be activated between two gas distribution plates. The activation operation is convenient and the activation efficiency is improved. At the same time, the amount of membrane electrode to be tested and the corresponding gas distribution plates can be increased according to actual needs to achieve batch activation.

[0029] (2) The off-line activation device of the utility model is provided with a gas circulation pipeline so that the gas coming out of the vent can be circulated to the inlet of the vent for recycling, thereby reducing the input amount of hydrogen and lowering the cost.

[0030] (3) The present invention utilizes the principle of electrochemical hydrogen pump, which helps to activate the catalyst, remove impurities and oxides on the catalyst surface, dredge the material transmission channel, and maximize the three-phase reaction interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the overall structure of the membrane electrode offline activation specimen of Example 1.

[0032] Figure 2 This is a schematic structural diagram of the upper end plate of Example 1.

[0033] Figure 3 This is a schematic diagram of the structure of the gas distribution plate of Example 1.

[0034] Figure 4This is a schematic structural diagram of the upper current collecting plate of Example 1.

[0035] Figure 5 This is a schematic structural diagram of the elastic component of Example 1.

[0036] Figure 6 This is a schematic structural diagram of one side of the gas distribution plate of Example 2.

[0037] Figure 7 This is a schematic structural diagram of the other side of the gas distribution plate of Example 2.

[0038] Figure 8 This is a schematic diagram of the overall structure of the membrane electrode offline activation device of Example 3.

[0039] Figure numerals: upper end plate 100, lower end plate 110, sealing ring 120, upper current collecting plate 200, lower current collecting plate 210, membrane electrode 300, gas distribution plate 310, flow channel area 311, elastic component 312, placement position 313, vent 400, closing portion 410, through portion 420, fixing hole 500, gas supply pipeline 600, first gate valve 610, second gate valve 620, gas exhaust pipeline 700, gas circulation pipeline 800, gas circulation pump 810, humidification system 820, third gate valve 830, fourth gate valve 840. DETAILED DESCRIPTION

[0040] The drawings of the present invention are only used for illustrative purposes and cannot be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0041] Example 1

[0042] refer to Figures 1 to 4The present embodiment provides a membrane electrode 300 offline activation test piece based on an electrochemical hydrogen pump, comprising an upper end plate 100, an upper current collecting plate 200, a lower current collecting plate 210, a lower end plate 110 and a plurality of membrane electrode 300 units, wherein the upper end plate 100, the upper current collecting plate 200, the membrane electrode 300 units, the lower current collecting plate 210 and the lower end plate 110 are stacked in sequence; the upper end plate 100, the upper current collecting plate 200, the gas distribution plate 310, the lower current collecting plate 210 and the lower end plate 110 are all provided with vent holes 4 00, the vent holes 400 are connected to form a vent channel. Preferably, the vent holes 400 of each plate structure correspond in position, and the shape and size of the vent holes 400 on the gas distribution plate 310 are consistent with the pores on the membrane electrode; the membrane electrode 300 unit includes a membrane electrode 300 and a gas distribution plate 310 arranged on both sides of the membrane electrode 300. Both sides of the gas distribution plate 310 are provided with a flow channel area 311, and the flow channel area 311 is connected to the vent channel, and the gas enters the membrane electrode 300 from the flow channel area 311. The flow channel area 311 includes a plurality of connected straight flow channels. The membrane electrode 300 offline activation test also includes a pressure-bearing mechanism 130 and a pressure-applying mechanism. The pressure-bearing mechanism 130 is connected to the upper end plate 100 and the lower end plate 110, and the pressure-applying mechanism applies pressure to the upper end plate 100 and the lower end plate 110 through the pressure-bearing mechanism 130. Specifically, the upper end plate 100 and the lower end plate 110 are made of insulating material or conductive material plus a coating of insulating material. Specifically, the insulating material can be a resin / composite material, such as nylon, glass fiber, PP, PE, etc.; the conductive material can be stainless steel, copper plate, aluminum alloy, etc. The upper current collecting plate 200 and the lower current collecting plate 210 are made of metal material with good conductivity. The gas distribution plate 310 is made of metal material or graphite material with good conductivity.

[0043] Preferably, the size of the flow channel area 311 at least covers the active area of ​​the membrane electrode 300. The flow channel areas 311 on both sides of the gas distribution plate 310 may be connected or not connected. When not connected, the hydrogen at the anode of the membrane electrode 300 is provided from the outside; when both sides are connected, the hydrogen at the anode of the membrane electrode 300 comes from the hydrogen provided from the outside and the hydrogen generated by the cathode of the previous membrane electrode 300.

[0044] The edge of the gas distribution plate 310 is provided with a sealing ring, and the vent hole 400 and the flow channel area 311 are provided in the sealing ring. The upper end plate 100 and the lower end plate 110 are both provided with a sealing ring, and the vent hole 400 is provided in the sealing ring.

[0045] The upper end plate 100, the upper current collecting plate 200, the gas distribution plate 310, the lower current collecting plate 210 and the lower end plate 110 are respectively provided with a plurality of vent holes 400, for example, the number of the vent holes 400 is 1, 2, 3 or 4, etc. The vent holes 400 on the gas distribution plate 310 may all penetrate.

[0046] The membrane electrode 300 offline activation specimen further includes a fastening mechanism, the upper end plate 100, the upper current collecting plate 200, the gas distribution plate 310, the lower current collecting plate 210 and the lower end plate 110 are square, and fixing holes 500 are provided at the four corners, and the fastening mechanism matches the fixing holes 500. The fastening mechanism includes but is not limited to screws and nuts.

[0047] refer to Figure 3 and Figure 5 Each two gas distribution plates 310 are connected by an elastic component 312, and a placement position 313 for accommodating the elastic component 312 is provided on the gas distribution plate 310, and the distance between the two gas distribution plates 310 is controlled by the expansion and contraction of the elastic component 312. Preferably, the elastic component 312 is a spring, and the placement positions 313 are provided on three sides of the gas distribution plate 310, and the spring is connected to the placement position 313. Compared with the arrangement of the elastic component 312 on all four sides, the arrangement of the three sides can facilitate the placement and removal of the membrane electrode 300.

[0048] Example 2

[0049] refer to Figure 6 and Figure 7 , this embodiment provides an off-line activation specimen of a membrane electrode 300 based on an electrochemical hydrogen pump, and its structure is similar to that of Embodiment 1, except that: the vents 400 on the gas distribution plate 310 are provided with a closed portion 410 and a through portion 420, and the closed portion 410 is on one side of the flow channel area 311. Take the gas distribution plate 310 with four vents 400 as an example, wherein the closed portions 410 of two vents 400 guide the gas to the flow channel area 311 on one side, and the closed portions 410 of the other two vents 400 guide the gas to the flow channel area 311 on the other side. At this time, the specimen of this embodiment can be activated in a manner that requires the anode and cathode cavities to be divided, for example, hydrogen is introduced into the anode of the membrane electrode 300, and air is introduced into the cathode for activation treatment, and at this time, the flow channel area 311 is not set to be penetrated. The upper end plate 100 and the lower end plate 110 are each provided with two vents 400. The two vents 400 of the upper end plate 100 are provided on the same side, i.e., non-diagonal positions, and the two vents 400 of the lower end plate 110 are provided on the side opposite to the vents 400 of the upper end plate 100. Specifically, one of the vents 400 of the upper end plate 100 is an inlet hole for hydrogen, and the other is an inlet hole for air. The vents 400 of the lower end plate 110 diagonally opposite to the hydrogen inlet hole are outlet holes for hydrogen, and the vents 400 diagonally opposite to the air inlet hole are outlet holes for air. Such a configuration allows more gas to enter the flow channel of the gas distribution plate, further improving the activation efficiency.

[0050] Example 3

[0051] refer to Figure 8This embodiment provides an off-line activation device for a membrane electrode 300 based on an electrochemical hydrogen pump, wherein the activation device includes a gas supply pipeline 600, a gas exhaust pipeline 700, a gas circulation pipeline 800, an external power supply, and the membrane electrode 300 off-line activation specimen provided in Example 1.

[0052] The gas supply pipeline 600 is connected to the vent hole 400 of the upper end plate 100, the gas exhaust pipeline 700 is connected to the vent hole 400 of the lower end plate 110, the gas circulation pipeline 800 is connected to the gas supply pipeline 600 and the gas exhaust pipeline 700, and the external power supply is electrically connected to the upper collecting plate 200 and the lower collecting plate 210.

[0053] The air hole 400 of the upper end plate 100 is the entrance of the air duct, and the air hole 400 of the lower end plate 110 is the exit of the air duct. The exit of the gas supply pipeline 600 and the entrance of the gas exhaust pipeline 700 correspond to the number of the air holes 400 on each plate. For example, if two air holes 400 are provided on each plate, the outlet of the gas supply pipeline 600 is provided with two branch pipelines, which are respectively connected to the two air holes 400 of the upper end plate 100, and the entrance of the gas exhaust pipeline 700 is provided with two branch pipelines, which are respectively connected to the two air holes 400 of the lower end plate 110. In this way, the gas supply pipeline 600, the air duct and the gas exhaust pipeline 700 are connected.

[0054] Furthermore, a first gate valve 610 is provided on the gas supply pipeline 600, a second gate valve 620 is provided on the gas exhaust pipeline 700, and a gas circulation pump 810, a humidification system 820, a third gate valve 830 and a fourth gate valve 840 are provided on the gas circulation pipeline 800; the humidification system 820 is arranged between the gas circulation pump 810 and the fourth gate valve 840; the first gate valve 610 is arranged on the side of the connection end of the gas circulation pipeline 800 and the gas supply pipeline 600 away from the membrane electrode 300 offline activation specimen; the second gate valve 620 is arranged on the side of the connection end of the gas circulation pipeline 800 and the gas exhaust pipeline 700 away from the membrane electrode 300 offline activation specimen; the third gate valve 830 is arranged on the side of the gas circulation pump 810 close to the gas exhaust pipeline 700; the fourth gate valve 840 is arranged on the side of the gas circulation pump 810 close to the gas supply pipeline 600. The provision of the third gate valve 830 and the fourth gate valve 840 increases the flexibility of operation and facilitates the maintenance of the humidification system 820 and the gas circulation pump 810 during operation.

[0055] The specific use process of the device of this embodiment is as follows: the anode of the membrane electrode 300 is facing upwards and placed between the two gas distribution plates 310. The pressure-applying mechanism presses and seals the pressure-receiving mechanism 130, compresses the elastic component 312, and locks the fastening device. To further make the contact between the various plate layers of the specimen closer, the pressure-applying mechanism includes but is not limited to a hydraulic press. The positive electrode of the external power supply is connected to the upper current collecting plate 200, the negative electrode is connected to the lower current collecting plate 210, the outlet of the gas supply pipeline 600 is connected to the vent 400 of the upper end plate 100, and the inlet of the gas discharge pipeline 700 is connected to the vent 400 of the lower end plate 110. Open the first gate valve 610, the second gate valve 620, the third gate valve 830 and the fourth gate valve 840, introduce hydrogen into the air passage, turn on the gas circulation pump 810 and the humidification system 820, close the first gate valve 610 and the second gate valve 620, turn on the power supply, and perform constant potential or constant current electrochemical hydrogen pump activation on the membrane electrode 300. After the activation is completed, the humidification system 820 is closed, the first gate valve 610 and the second gate valve 620 are opened, and nitrogen is introduced through the gas supply pipeline 600 for purging, thereby completing the activation treatment of the membrane electrode 300 and removing the hydrogen in the specimen. The fastening mechanism is loosened, the pressure mechanism is depressurized, and the adjacent gas distribution plate 310 is bounced open under the action of the elastic component 312, and the activated membrane electrode 300 is taken out.

[0056] Obviously, the above embodiments of the utility model are only examples for clearly explaining the technical solution of the utility model, and are not intended to limit the specific implementation methods of the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the utility model shall be included in the protection scope of the claims of the utility model.

Claims

1. A membrane electrode offline activation specimen based on an electrochemical hydrogen pump, characterized in that: It includes an upper end plate, an upper current collecting plate, a lower current collecting plate, a lower end plate and a plurality of membrane electrode units, wherein the upper end plate, the upper current collecting plate, the membrane electrode unit, the lower current collecting plate and the lower end plate are stacked in sequence; The upper end plate, the upper current collecting plate, the gas distribution plate, the lower current collecting plate and the lower end plate are all provided with ventilation holes, and the ventilation holes are connected to form a ventilation channel; The membrane electrode unit comprises a membrane electrode and a gas distribution plate arranged on both sides of the membrane electrode. Both sides of the gas distribution plate are provided with a flow channel area, the flow channel area is connected to the air channel, and the gas enters the membrane electrode from the flow channel area.

2. The membrane electrode offline activation specimen based on the electrochemical hydrogen pump according to claim 1, characterized in that: Every two gas distribution plates are connected by an elastic component. A placement position for accommodating the elastic component is provided on the gas distribution plate. The distance between the two gas distribution plates is controlled by the expansion and contraction of the elastic component.

3. The membrane electrode offline activation specimen based on the electrochemical hydrogen pump according to claim 1, characterized in that: It also includes a pressure-receiving mechanism and a pressure-applying mechanism, wherein the pressure-receiving mechanism is connected to the upper end plate and the lower end plate, and the pressure-applying mechanism applies pressure to the upper end plate and the lower end plate through the pressure-receiving mechanism.

4. The membrane electrode offline activation specimen based on the electrochemical hydrogen pump according to claim 1, characterized in that: The flow channel area includes a plurality of connected straight flow channels.

5. The membrane electrode offline activation specimen based on the electrochemical hydrogen pump according to claim 4, characterized in that: The flow channel areas on both sides of the gas distribution plate are interconnected.

6. The membrane electrode offline activation specimen based on electrochemical hydrogen pump according to claim 1, characterized in that: A sealing ring is provided at the edge of the gas distribution plate, and the vent hole and the flow channel area are arranged in the sealing ring.

7. The membrane electrode offline activation test piece based on an electrochemical hydrogen pump according to any one of claims 1 to 6, characterized in that: The upper end plate, the upper current collecting plate, the gas distribution plate, the lower current collecting plate and the lower end plate are respectively provided with four ventilation holes.

8. The membrane electrode offline activation test piece based on an electrochemical hydrogen pump according to any one of claims 1 to 6, characterized in that: It also includes a fastening mechanism. The upper end plate, upper collecting plate, gas distribution plate, lower collecting plate and lower end plate are square, and fixing holes are provided at the four corners. The fastening mechanism matches the fixing holes.

9. A membrane electrode offline activation device based on an electrochemical hydrogen pump, characterized in that: The activation device comprises a gas supply pipeline, a gas exhaust pipeline, a gas circulation pipeline, an external power supply and a membrane electrode offline activation test piece according to any one of claims 1 to 8, The gas supply pipeline is connected to the vent holes of the upper end plate, the gas exhaust pipeline is connected to the vent holes of the lower end plate, the gas circulation pipeline is connected to the gas supply pipeline and the gas exhaust pipeline, and the external power supply is electrically connected to the upper collecting plate and the lower collecting plate.

10. The membrane electrode offline activation device based on electrochemical hydrogen pump according to claim 9, characterized in that: The gas supply pipeline is provided with a first gate valve, the gas discharge pipeline is provided with a second gate valve, the gas circulation pipeline is provided with a gas circulation pump and a humidification system; the humidification system is provided between the gas circulation pump and the fourth gate valve; The first gate valve is arranged at a side of the connection end of the gas circulation pipeline and the gas supply pipeline away from the membrane electrode offline activation test piece; The second gate valve is arranged at a side of the connection end between the gas circulation pipeline and the gas exhaust pipeline away from the membrane electrode offline activation specimen.

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