Multi-specification PEM electrolytic water membrane electrode testing device

Abstract

The utility model belongs to the technical field of PEM water electrolysis hydrogen production membrane electrode testing equipment, and particularly relates to a multi-specification PEM water electrolysis membrane electrode testing device which comprises a membrane electrode assembly, one side of the membrane electrode assembly is detachably connected with an anode unit, and the other side of the membrane electrode assembly is detachably connected with a cathode unit. Replaceable connecting pieces are clamped between the anode unit and the membrane electrode assembly and between the cathode unit and the membrane electrode assembly, an oxygen outlet hole and a plurality of water inlet holes are formed in the anode unit, valves are arranged on the water inlet holes, and the oxygen outlet hole and the water inlet holes are communicated with the side, close to the anode unit, of the membrane electrode assembly through the replaceable connecting pieces. A hydrogen outlet is formed in the cathode unit and is communicated with the other side of the membrane electrode assembly through a replaceable connecting piece. According to the utility model, the test of PEM electrolyzed water membrane electrodes with multiple specifications and sizes can be completed, the cost and the operation difficulty of the test of the PEM electrolyzed water membrane electrodes are reduced, and the device has significance in promoting the development of PEM electrolyzers.

Description

Technical Field

[0001] This utility model belongs to the technical field of PEM electrolysis water hydrogen production membrane electrode testing equipment, and particularly relates to a multi-specification PEM electrolysis water membrane electrode testing device. Background Technology

[0002] As a core component of PEM electrolyzer equipment, the performance of the PEM membrane electrode directly determines the success of hydrogen production through water electrolysis. Currently, most existing PEM membrane electrode testing devices are of fixed specifications and dimensions. Testing membrane electrodes with different active areas requires replacing the entire device, which greatly increases the testing cost of PEM membrane electrodes and hinders the development of PEM electrolyzers. Utility Model Content

[0003] The purpose of this invention is to provide a multi-specification PEM electrolysis water membrane electrode testing device to solve the problems existing in the prior art.

[0004] To achieve the above objectives, this utility model provides a multi-specification PEM electrolysis water membrane electrode testing device, including a membrane electrode assembly. An anode unit is detachably connected to one side of the membrane electrode assembly, and a cathode unit is detachably connected to the other side. Replaceable connectors are sandwiched between the anode unit, the cathode unit, and the membrane electrode assembly. The anode unit is provided with an oxygen outlet and several water inlets, each equipped with a valve. The oxygen outlet and water inlets are connected to the side of the membrane electrode assembly closest to the anode unit via the replaceable connectors. The cathode unit is provided with a hydrogen outlet, which is connected to the other side of the membrane electrode assembly via the replaceable connectors.

[0005] Preferably, the replaceable connector includes a sealing gasket, which is disposed on both sides of the membrane electrode assembly and has through holes.

[0006] Preferably, the membrane electrode assembly includes a membrane electrode, and a gas diffusion layer and a flow plate are sequentially disposed on both sides of the membrane electrode from the inside to the outside, and the through hole is disposed corresponding to the flow plate.

[0007] Preferably, the anode unit includes an anode plate, an anode sealing diaphragm, and an anode end plate arranged sequentially from the inside to the outside. The oxygen outlet and the water inlet both penetrate the anode end plate, the anode sealing diaphragm, and the anode plate to form a channel and communicate with the through hole.

[0008] Preferably, the cathode unit includes a cathode plate, a cathode sealing diaphragm, and a cathode end plate arranged sequentially from the inside out, and the hydrogen outlet passes through the cathode end plate, the cathode sealing diaphragm, and the cathode plate to form a gas channel and communicates with the through hole.

[0009] Preferably, the anode plate has a positive terminal hole; the cathode plate has a negative terminal hole.

[0010] Preferably, a temperature sensing hole is provided at one end of the anode plate along the length direction of the anode plate.

[0011] Preferably, the anode unit has a plurality of anode bolt holes around its periphery, the cathode unit has a plurality of cathode bolt holes around its periphery, and the replaceable connector and the membrane electrode assembly have through holes around their periphery. The anode unit, the cathode unit, the replaceable connector, and the membrane electrode assembly are all sealed together by bolts passing through the anode bolt holes, the through holes, and the cathode bolt holes in sequence.

[0012] Compared with the prior art, the present invention has the following advantages and technical effects:

[0013] This utility model provides a multi-specification PEM electrolysis water membrane electrode testing device.

[0014] By replacing replaceable connectors with different channel cross-sectional areas, the contact area between the tested membrane electrode assembly and the water can be adjusted. By controlling the opening and closing of the valves on each water inlet, the water flow path can be adaptively adjusted to correspond to the channel cross-sectional area on the replaceable connector and form a corresponding circulating water path. That is, at least two water inlets are provided on the projection corresponding to the channel on the replaceable connector, one water inlet is the water inlet end, and the other water inlet is the water outlet end, forming a water circulation path.

[0015] This invention uses a single PEM testing device to complete the testing of PEM electrolysis water membrane electrodes of various sizes, reducing the cost and operational difficulty of PEM electrolysis water membrane electrode testing, and is significant for promoting the development of PEM electrolyzers. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded view of a multi-specification PEM electrolysis membrane electrode testing device proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the anode plate in this utility model;

[0019] The components are as follows: 1. Cathode end plate; 11. Cathode bolt hole; 12. Hydrogen outlet; 2. Cathode sealing diaphragm; 3. Cathode plate; 31. Negative electrode wiring hole; 41. Sealing gasket; 42. Flow plate; 43. Gas diffusion layer; 44. Membrane electrode; 411. Through hole; 5. Anode plate; 51. Positive electrode wiring hole; 6. Anode sealing diaphragm; 7. Anode end plate; 71. Oxygen outlet hole; 72. Anode bolt hole; 73. Temperature probe hole; 74. Water inlet hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1 to 2 As shown, this utility model provides a multi-specification PEM electrolysis water membrane electrode testing device, including a membrane electrode assembly. An anode unit is detachably connected to one side of the membrane electrode assembly, and a cathode unit is detachably connected to the other side of the membrane electrode assembly. Replaceable connectors are sandwiched between the anode unit, the cathode unit, and the membrane electrode assembly. The anode unit is provided with an oxygen outlet 71 and several water inlets 74. Valves are provided on the several water inlets 74. The oxygen outlet 71 and the water inlets 74 are connected to the side of the membrane electrode assembly near the anode unit through replaceable connectors. The cathode unit is provided with a hydrogen outlet 12, which is connected to the other side of the membrane electrode assembly through replaceable connectors.

[0023] The diameters of the various water inlets 74 are different. In this embodiment, a total of 6 inlets are provided, which can be selected and used according to specific experimental needs.

[0024] By replacing replaceable connectors with different channel cross-sectional areas, the contact area between the tested membrane electrode assembly and the water can be adjusted. By controlling the opening and closing of the valve on each water inlet 74, the water flow path can be adaptively adjusted, thus corresponding to the channel cross-sectional area on the replaceable connector and forming a corresponding circulating water path. That is, at least two water inlets 74 are provided on the projection corresponding to the channel on the replaceable connector, one water inlet 74 is the water inlet end, and the other water inlet 74 is the water outlet end, forming a water circulation path.

[0025] Furthermore, the replaceable connector includes a sealing gasket 41, which is disposed on both sides of the membrane electrode assembly, and has through holes 411.

[0026] Furthermore, the membrane electrode assembly includes a membrane electrode 44. Gas diffusion layer 43 and flow plate 42 are sequentially arranged on both sides of the membrane electrode 44 from the inside to the outside. Through hole 411 is correspondingly arranged with flow plate 42. The size of flow plate 42 matches the size of membrane electrode and the inner frame size of sealing gasket 41. Gradient titanium mesh is used as flow plate 42. The thickness of flow plate 42 is 0.5-2mm. The thickness of gas diffusion layer is 0.5-2mm. The cathode can be carbon paper, titanium felt or sintered titanium plate. The anode can be titanium felt or sintered titanium plate.

[0027] Furthermore, the anode unit includes an anode plate 5, an anode sealing diaphragm 6, and an anode end plate 7 arranged sequentially from the inside out. The oxygen outlet hole 71 and the water inlet hole 74 both penetrate the anode end plate 7, the anode sealing diaphragm 6, and the anode plate 5 to form a channel and communicate with the through hole 411.

[0028] Specifically, the anode sealing diaphragm 6 has the same size as the anode end plate 7, and its thickness is 0.5-3mm.

[0029] Furthermore, the cathode unit includes a cathode plate 3, a cathode sealing diaphragm 2, and a cathode end plate 1 arranged sequentially from the inside out. The hydrogen outlet 12 penetrates the cathode end plate 1, the cathode sealing diaphragm 2, and the cathode plate 3 to form a gas passage and communicates with the through hole 411.

[0030] Furthermore, to facilitate connection to an external power source, a positive terminal connection hole 51 is provided on the anode plate 5; and a negative terminal connection hole is provided on the cathode plate 3.

[0031] Furthermore, in order to facilitate the detection of temperature during the hydrogen production process, a temperature detection hole 73 is provided at one end of the anode plate 7 along the length of the anode plate 7.

[0032] Furthermore, the anode unit has several anode bolt holes 72 around its periphery, and the cathode unit has several cathode bolt holes 11 around its periphery. The replaceable connector and the membrane electrode assembly all have through holes around their periphery. The anode unit, the cathode unit, the replaceable connector, and the membrane electrode assembly are all sealed together by bolts passing through the anode bolt holes 72, the through holes, and the cathode bolt holes 11 in sequence.

[0033] Specifically, one end of a bolt is passed sequentially through the anode end plate 7, the anode sealing diaphragm 6, the anode plate 5, the sealing gasket 41, the membrane electrode 44, the sealing gasket 41, the cathode plate 3, the cathode sealing diaphragm 2, and the cathode end plate 1, and then tightened with a nut to form a sealed experimental device. The anode and cathode sealing diaphragms are completely matched to the dimensions of the anode and cathode end plates. The sealing diaphragms are made of polytetrafluoroethylene, and their airtightness meets the experimental test requirements.

[0034] The multi-specification PEM electrolysis water membrane electrode testing device provided by this utility model works as follows: Select sealing gaskets 41 with appropriate area through holes 411 and assemble them in parallel to meet the airtightness requirements. Connect the negative electrode connection hole 31 and the positive electrode connection hole 51 to the power supply. Select at least two water inlet holes 74, one water inlet hole 74 as the water inlet end and the other water inlet hole 74 as the water outlet end to form a water circulation. The valves on the other water inlet holes 74 are in the closed state. Insert the temperature probe into the temperature probe hole 73 to conduct experimental performance testing of electrolysis hydrogen production.

[0035] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A multi-specification PEM electrolysis water membrane electrode testing device, characterized in that, The device includes a membrane electrode assembly, one side of which is detachably connected to an anode unit, and the other side of which is detachably connected to a cathode unit. A replaceable connector is sandwiched between the anode unit, the cathode unit, and the membrane electrode assembly. The anode unit is provided with an oxygen outlet (71) and several water inlets (74). Each of the water inlets (74) is provided with a valve. The oxygen outlet (71) and the water inlets (74) are connected to the side of the membrane electrode assembly near the anode unit through the replaceable connector. The cathode unit is provided with a hydrogen outlet (12), which is connected to the other side of the membrane electrode assembly through the replaceable connector.

2. The multi-specification PEM electrolysis membrane electrode testing device according to claim 1, characterized in that, The replaceable connector includes a sealing gasket (41) which is disposed on both sides of the membrane electrode assembly and has a through hole (411).

3. The multi-specification PEM electrolysis membrane electrode testing device according to claim 2, characterized in that, The membrane electrode assembly includes a membrane electrode (44), and a gas diffusion layer (43) and a flow plate (42) are arranged sequentially from the inside to the outside on both sides of the membrane electrode (44). The through hole (411) is arranged correspondingly to the flow plate (42).

4. The multi-specification PEM electrolysis membrane electrode testing device according to claim 2, characterized in that, The anode unit includes an anode plate (5), an anode sealing diaphragm (6), and an anode end plate (7) arranged sequentially from the inside to the outside. The oxygen outlet (71) and the water inlet (74) both penetrate the anode end plate (7), the anode sealing diaphragm (6), and the anode plate (5) to form a channel and communicate with the through hole (411).

5. The multi-specification PEM electrolysis membrane electrode testing device according to claim 4, characterized in that, The cathode unit includes a cathode plate (3), a cathode sealing diaphragm (2), and a cathode end plate (1) arranged sequentially from the inside to the outside. The hydrogen outlet (12) passes through the cathode end plate (1), the cathode sealing diaphragm (2), and the cathode plate (3) to form a gas passage and communicates with the through hole (411).

6. The multi-specification PEM electrolysis membrane electrode testing device according to claim 5, characterized in that, The anode plate (5) has a positive electrode connection hole (51); the cathode plate (3) has a negative electrode connection hole.

7. The multi-specification PEM electrolysis membrane electrode testing device according to claim 4, characterized in that, A temperature sensing hole (73) is provided at one end of the anode plate (7) along the length direction of the anode plate (7).

8. The multi-specification PEM electrolysis membrane electrode testing device according to claim 1, characterized in that, The anode unit has several anode bolt holes (72) around its periphery, and the cathode unit has several cathode bolt holes (11) around its periphery. The replaceable connector and the membrane electrode assembly both have through holes around their periphery. The anode unit, the cathode unit, the replaceable connector, and the membrane electrode assembly are all sealed together by bolts passing through the anode bolt holes (72), the through holes, and the cathode bolt holes (11) in sequence.

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