An evaluation device for a PEM electrolysis water film electrode

Abstract

The utility model discloses a kind of for PEM electrolytic water membrane electrode evaluation device, to PEM electrolytic water membrane electrode evaluation device including water tank, with the heating tank being connected with the water tank, with the electrolytic cell being communicated with the heating tank and with the power supply being connected with the electrolytic cell, the bottom of the heating tank and the bottom of the electrolytic cell are communicated by first conveying pipeline, the top of the electrolytic cell and the top of the heating tank are communicated by second conveying pipeline, the power supply is equipped with voltage detection component, to when the power supply applies different voltage to the electrolytic cell, working voltage can be detected by the voltage detection component. In the present application, after power supply applies different voltage to electrolytic cell, the voltage required for electrolytic water under different current density is detected by voltage detection component, to judge membrane electrode performance good or bad in this way.

Description

Technical Field

[0001] This utility model relates to the field of PEM electrolysis water technology, and in particular to an evaluation device for PEM electrolysis water membrane electrodes. Background Technology

[0002] In recent years, fuel cell vehicles have developed rapidly. Hydrogen, with its advantages of high efficiency, cleanliness, and storability and transportability, is regarded as the most ideal energy carrier. Proton exchange membrane (PEM) water electrolysis technology has attracted increasing attention. Due to its advantages of high efficiency, zero emissions, compact structure, environmental friendliness, and high product purity, PEM water electrolysis technology has become a research hotspot in the field of hydrogen production. Research needs to be carried out on key materials and related components in this technology to achieve high performance, long life and low cost manufacturing requirements.

[0003] In a water electrolyzer, the anode loses electrons under an applied voltage, meaning water loses electrons at the anode and oxygen is released, producing hydrogen ions. These hydrogen ions pass through a proton exchange membrane as hydrated hydrogen ions and gain electrons at the cathode to generate hydrogen gas. In this electrolyzer structure, the membrane electrode assembly (MEA) is the site of the electrolysis reaction and is the core component. It consists of a catalytic layer for the electrochemical reaction, a proton exchange membrane (PEM) for conducting water and hydrogen ions, and a diffusion layer for transferring water and gas. The catalytic layer is composed of a catalyst and Nafion. The MEA assembly is the core of the electrolyzer, directly affecting electrolysis efficiency, energy consumption, cost, and lifespan.

[0004] Therefore, there is an urgent need to provide a device for judging the performance of membrane electrodes and to evaluate their performance. Utility Model Content

[0005] The main objective of this invention is to provide an evaluation device for PEM electrolytic water membrane electrodes, aiming to solve the aforementioned technical problems.

[0006] To achieve the above objectives, this utility model proposes an evaluation device for PEM electrolysis water membrane electrodes, comprising: a water tank, a heating tank connected to the water tank, an electrolytic cell connected to the heating tank, and a power supply connected to the electrolytic cell. The bottom of the heating tank and the bottom of the electrolytic cell are connected through a first conveying pipeline, and the top of the electrolytic cell and the top of the heating tank are connected through a second conveying pipeline. The power supply is equipped with a voltage detection component so that the operating voltage can be detected by the voltage detection component when different voltages are applied to the electrolytic cell by the power supply.

[0007] In one embodiment, a replenishment pump and a first filter are sequentially arranged between the water tank and the heating tank.

[0008] In one embodiment, the first delivery pipeline is provided with a second filter and a first purification column, and the second pipeline is provided with a third filter and a second purification column.

[0009] In one embodiment, a flow regulating pump is provided on the first delivery pipeline.

[0010] In one embodiment, the flow regulating pump is a gear pump or an electromagnetic pump.

[0011] In one embodiment, a water flow meter is provided on the first delivery pipeline between the flow regulating pump and the electrolytic cell.

[0012] In one embodiment, the first delivery pipeline is equipped with a first temperature detector and a first conductivity detector, and the second delivery pipeline is equipped with a second temperature detector.

[0013] In one embodiment, a nitrogen inlet is provided on the first delivery pipeline.

[0014] In one embodiment, a gas-liquid separator is provided on the second delivery pipeline, and the gas-liquid separator is connected to the top of the electrolytic cell.

[0015] In one embodiment, a second conductivity detector is provided on the second delivery pipeline.

[0016] In this invention, the device for evaluating PEM (Polymer Electrolysis Membrane) water electrolysis membrane electrodes includes: a water tank, a heating tank connected to the water tank, an electrolysis cell connected to the heating tank, and a power supply connected to the electrolysis cell. The bottom of the heating tank and the bottom of the electrolysis cell are connected via a first conveying pipeline, and the top of the electrolysis cell and the top of the heating tank are connected via a second conveying pipeline. The power supply is equipped with a voltage detection component to detect the operating voltage when different voltages are applied to the electrolysis cell. Therefore, by applying different voltages to the electrolysis cell and detecting the voltage required for water electrolysis at different current densities, the performance of the membrane electrode can be determined. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the structure of the PEM electrolysis water membrane electrode evaluation device according to an embodiment of the present invention.

[0019] Figure descriptions: 10, Water tank; 20, Heating tank; 30, Electrolytic cell; 40, Power supply; 50, First delivery pipeline; 60, Second delivery pipeline; 70, Make-up pump; 80, First filter; 90, Second filter; 100, First purification column; 110, Flow regulating pump; 120, Water flow meter; 130, First temperature detector; 140, First conductivity detector; 150, Nitrogen inlet; 160, Second temperature detector; 170, Third filter; 180, Second purification column; 190, Second conductivity detector; 200, Gas-liquid separator.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] 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.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] This invention provides a device for evaluating PEM electrolytic water membrane electrodes.

[0026] The device for evaluating PEM electrolytic water membrane electrodes provided in this embodiment includes: a water tank 10, a heating tank 20 connected to the water tank 10, an electrolytic cell 30 connected to the heating tank 20, and a power supply 40 connected to the electrolytic cell 30. The bottom of the heating tank 20 and the bottom of the electrolytic cell 30 are connected through a first conveying pipe 50, and the top of the electrolytic cell 30 and the top of the heating tank 20 are connected through a second conveying pipe 60. The power supply 40 is equipped with a voltage detection component so that the operating voltage can be detected when different voltages are applied to the electrolytic cell 30 by the power supply 40.

[0027] In this embodiment, different voltages can be applied to the electrolysis cell 30 by the power supply 40, and the voltage detection component can detect the voltage required for water electrolysis at different current densities to determine the performance of the membrane electrode.

[0028] The system includes a replenishment pump 70 and a first filter 80 sequentially installed between the water tank 10 and the heating tank 20. A second filter 90 and a first purification column 100 are installed on the first delivery pipeline 50, and a third filter 170 and a second purification column 180 are installed on the second pipeline. By using filters and purification columns, impurities are reduced, ensuring water purity. The entire system ensures that the water at the outlet of the water tank 10, the outlet of the heating tank 20, and the recycled water all pass through filters and purification columns, significantly reducing water conductivity and water change frequency, and effectively preventing membrane electrode poisoning caused by water quality issues. The detection of water temperature and conductivity at the inlet and outlet of the electrolyzer 30 reduces the impact of water temperature fluctuations on performance evaluation.

[0029] A flow regulating pump 110 is installed on the first delivery pipeline 50, and a water flow meter 120 is installed on the first delivery pipeline 50 between the flow regulating pump 110 and the electrolytic cell 30. Therefore, the flow rate can be regulated by the flow regulating pump 110. Optionally, the flow regulating pump 110 can be a gear pump or an electromagnetic pump. Of course, in other embodiments, the flow regulating pump 110 can also take other forms. The water flow meter 120 allows for flow rate statistics, facilitating user observation.

[0030] In addition, the first delivery pipeline 50 is equipped with a first temperature detector 130 and a first conductivity detector 140, the second delivery pipeline 60 is equipped with a second temperature detector 160, and the second delivery pipeline 60 is equipped with a second conductivity detector 190.

[0031] First, add an appropriate amount of ultrapure water to water tank 10, and then introduce it into heating tank 20 through replenishment pump 70 and filter, setting an appropriate temperature. Once the temperature of heating tank 20 stabilizes, turn on the gear pump and adjust the flow rate by adjusting water flow meter 120 to introduce the water into electrolytic cell 30. Then, observe the first conductivity detector 140 and the first temperature detector 130 before electrolytic cell 30 to detect the conductivity of the water before it enters the reactor, thereby determining whether the water is contaminated.

[0032] The second temperature detector 160 after the electrolyzer 30 is observed and the discharge temperature is recorded. The conductivity meter before the heating tank 20 is observed. After water is passed through the electrolyzer 30 for 20-30 minutes, the power supply 40 is turned on and current is applied to the electrolyzer 30. The voltage required for water electrolysis under different current densities can be read to determine the performance of the membrane electrode.

[0033] The first delivery pipeline 50 is equipped with a nitrogen inlet 150 to improve safety by adding a protective gas.

[0034] A gas-liquid separator 200 is installed on the second delivery pipeline 60, and the gas-liquid separator 200 is connected to the top of the electrolytic cell 30. In this embodiment, after the water in the electrolytic cell 30 reacts, a large amount of gas is generated, and the unreacted water is separated by the gas-liquid separator 200. The gas is discharged, reducing the pipeline pressure, while the water passes through the third filter 170 and the second purification column 180 and returns to the heating tank 20, improving utilization.

[0035] In addition, drain valves can be installed at the bottom of the water tank 10, heating tank 20 and electrolytic cell 30, which can easily drain the medium inside the tank and facilitate cleaning.

[0036] In an optional embodiment, the electrolyzer 30 can be a JFEF-25 PEM water electrolysis hydrogen production fixture; the power supply 40 can be an NXP N36150-20-100; the flow regulating pump 110 can be a Nanjing Xinke 24V high-temperature brushless self-priming pump; the water flow meter 120 can be a Hangzhou Yikong GICAR-1111 / DN0.7; and the first conductivity detector 140 and the second conductivity detector 190 can be Shanghai Chengci DZG-303ADK(PT) (485). Of course, in this embodiment, other undescribed components can also be existing components. Furthermore, in other embodiments, the above components can be other types of equipment, which will not be elaborated here.

[0037] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.

Claims

1. A device for evaluating PEM electrolytic water membrane electrodes, characterized in that, The device for evaluating PEM electrolytic water membrane electrodes includes: a water tank (10), a heating tank (20) connected to the water tank (10), an electrolytic cell (30) connected to the heating tank (20), and a power supply (40) connected to the electrolytic cell (30). The bottom of the heating tank (20) and the bottom of the electrolytic cell (30) are connected through a first conveying pipe (50), and the top of the electrolytic cell (30) and the top of the heating tank (20) are connected through a second conveying pipe (60). The power supply (40) is equipped with a voltage detection component so that when different voltages are applied to the electrolytic cell (30) by the power supply (40), the working voltage can be detected by the voltage detection component.

2. The device for evaluating PEM electrolysis membrane electrodes according to claim 1, characterized in that, A replenishment pump (70) and a first filter (80) are sequentially arranged between the water tank (10) and the heating tank (20).

3. The device for evaluating PEM electrolysis membrane electrodes according to claim 1, characterized in that, The first delivery pipeline (50) is provided with a second filter (90) and a first purification column (100), and the second delivery pipeline (60) is provided with a third filter (170) and a second purification column (180).

4. The device for evaluating PEM electrolysis membrane electrodes according to claim 3, characterized in that, A flow regulating pump (110) is installed on the first delivery pipeline (50).

5. The device for evaluating PEM electrolytic water membrane electrodes according to claim 4, characterized in that, The flow regulating pump (110) is a gear pump or an electromagnetic pump.

6. The device for evaluating PEM electrolytic water membrane electrodes according to claim 4, characterized in that, A water flow meter (120) is installed on the first delivery pipeline (50) between the flow regulating pump (110) and the electrolytic cell (30).

7. The device for evaluating PEM electrolysis membrane electrodes according to claim 1, characterized in that, The first delivery pipeline (50) is equipped with a first temperature detector (130) and a first conductivity detector (140), and the second delivery pipeline (60) is equipped with a second temperature detector (160).

8. The device for evaluating PEM electrolysis membrane electrodes according to claim 1, characterized in that, A nitrogen inlet (150) is provided on the first delivery pipeline (50).

9. The device for evaluating PEM electrolysis membrane electrodes according to claim 1, characterized in that, A gas-liquid separator (200) is provided on the second conveying pipeline (60), and the top of the gas-liquid separator (200) is connected to the top of the electrolytic cell (30).

10. The device for evaluating PEM electrolysis membrane electrodes according to claim 8, characterized in that, A second conductivity detector (190) is installed on the second delivery pipeline (60).

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