Integrated experiment table system for measuring electrolysis performance and internal temperature of alkaline water electrolysis tank

Abstract

The invention relates to an integrated experiment table system for measuring electrolytic performance and internal temperature of an alkaline water electrolytic bath. The integrated experiment table system comprises an environment box, the alkaline water electrolytic bath for experiments, a direct-current power supply, a hydrogen side gas-liquid separation bottle, an oxygen side gas-liquid separation bottle, a temperature measuring line, a paperless recorder and a constant-temperature water bath. The alkaline water electrolytic bath for experiments can change flow field design, small chamber scale, heat dissipation and bath body environment temperature control components so as to meet diversified experiment requirements. And the alkali liquor circulating pump is connected with the gas-liquid separation bottle and the electrolytic bath to realize alkali liquor circulation. And the computer terminal is in communication connection with the direct-current power supply, the paperless recorder and the alkali liquor circulating pump and is used for data collection and component control. The hydrogen-side gas-liquid separation bottle and the oxygen-side gas-liquid separation bottle have specific structures for gas-liquid separation and alkali liquor treatment. Compared with the prior art, the experiment table system is easy to disassemble and assemble, stable in operation, capable of decoupling key parameters and obtaining dynamic temperature data in the electrolytic cell, large in freedom degree and capable of guiding industrial hydrogen production strategy making and assisting related research and product research and development of the alkaline water electrolytic cell.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic cells, and in particular to an integrated experimental table system for measuring electrolytic performance and internal temperature of an alkaline water electrolytic cell. Background Art

[0002] Against the backdrop of the global energy crisis and worsening environmental pollution, promoting the clean energy revolution has become the main trend in the world's energy industry. In recent years, China has attached increasing importance to the development of the new energy industry, especially investing more resources and attention in the hydrogen energy industry. It is expected that hydrogen energy will play an increasingly important role in promoting China's energy structure reform and ensuring national energy security. At present, the technical routes for hydrogen production by water electrolysis mainly include alkaline, proton exchange membrane and solid oxide water electrolysis. Among these technologies, alkaline water electrolysis water hydrogen production is the oldest and most mature method, with simple and easy-to-operate equipment and has been commercialized. It is reported that the hydrogen production of a single set of electrolyzers has exceeded 3,000 cubic meters per hour.

[0003] After searching the literature of the prior art, it is found that the current research on alkaline water electrolysis system is mostly focused on the control method of the electrolysis system, diaphragm and electrode materials, preparation methods, etc., in order to achieve the purpose of improving the efficiency of hydrogen production in the electrolyzer, improving product purity, and reducing costs. Chinese patent document CN 116516412A discloses an alkaline water hydrogen production control system and an alkaline water hydrogen production control method configured with a main server, a switch, a data acquisition device, and an instruction execution device, so as to realize the centralized control of the alkaline water hydrogen production system. Chinese patent document CN 220643283U discloses a waste heat recovery system for hydrogen production by electrolysis for raw water heating system, designs a heat exchange device and uses the waste heat of the electrolysis system to heat the raw water, and improves the overall operation economy of the system. Chinese patent document CN117286538A discloses a high temperature resistant / wide temperature range applicable alkaline water electrolysis hydrogen production composite diaphragm and its preparation method, and the PPS cloth designed and prepared by modification is dipped and dried with a special treatment liquid to obtain a new high temperature resistant / wide temperature range applicable alkaline water electrolysis hydrogen production composite diaphragm. Chinese patent document CN117626323A discloses a method for preparing a catalytic material for hydrogen production by alkaline water electrolysis, which adopts a combination of spraying + machining + hydrothermal synthesis to prepare the catalytic material for hydrogen production by alkaline water electrolysis. This method has a simple process and low cost, and takes into account both the catalytic performance of the electrode catalytic material and the mechanical properties. Although the existing related research has improved the efficiency of hydrogen production by alkaline water electrolysis from the perspectives of system control, materials, and preparation methods, the research on the test method of hydrogen production by electrolysis system and the electric, thermal and mass coupling inside the electrolyzer is insufficient. There is no complete test system for feasibility testing of electrodes and tank design, and the electric, thermal and mass coupling relationship inside the electrolyzer is not clear, which has become an obstacle to the development of alkaline water electrolysis technology.

[0004] In fact, the electric-thermal-mass coupling relationship inside the alkaline water electrolyzer is a research problem. On the one hand, when the electrode reacts, gas is generated on its surface and transferred to the electrolyte. When the gas covers the electrode surface, the effective reaction area will be reduced and the hydrogen production efficiency will be reduced. On the other hand, the generated gas will increase the ohmic resistance and the temperature of the reaction surface will rise, resulting in an increase in the reaction efficiency. In addition, bubbles will also affect the transfer of heat, and the flow rate will also affect the bubble coverage and heat transfer on the electrode surface. It can be seen that the electric-thermal-mass coupling relationship inside the alkaline water electrolyzer is complex and directly affects the electrolyzer design and electrolysis system regulation. However, due to the sealing and alkaline environment of the alkaline water electrolyzer, it is difficult to measure the internal electric-thermal-mass indicators (current density, temperature, flow rate, gas phase volume fraction, etc.), which makes it difficult to comprehensively consider the internal electric-thermal-mass influence when designing and formulating the control strategy of the alkaline water electrolyzer, so that the efficiency of hydrogen production by electrolysis has not been further improved.

[0005] Therefore, there is a need for an effective method to measure the internal electrical and thermal quality indicators of the alkaline water electrolyzer. Among the above indicators, temperature measurement is relatively easy to achieve. The internal temperature distribution characteristics can guide the design and control, clarify the actual working temperature of the electrolyzer, improve the lower temperature, and avoid safety problems caused by high temperature hot spots. At present, the temperature measurement related technology is mature, but due to the limitations of sealing, strong alkali corrosion and other conditions, it is still limited to the outside of the electrolyzer (external inlet and outlet) in the alkaline water electrolysis system, resulting in a large difference between the measured temperature and the actual internal temperature, and there is a lack of effective methods to directly measure the internal temperature. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an integrated experimental bench system for measuring the electrolysis performance and internal temperature of an alkaline water electrolyzer. The experimental bench system is simple to assemble and disassemble, has stable operation, can decouple key parameters, obtain dynamic temperature data inside the electrolyzer, has a large degree of freedom, can guide the formulation of industrial hydrogen production strategies, and assist in related research and product development of alkaline water electrolyzers.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] The present invention provides an integrated experimental platform system for measuring the electrolytic performance and internal temperature of an alkaline water electrolyzer, comprising an environmental chamber, an alkaline water electrolyzer for experiments, a direct current power supply, a hydrogen-side gas-liquid separation bottle and an oxygen-side gas-liquid separation bottle, a temperature measuring line, a paperless recorder, and a constant temperature water bath, wherein specifically:

[0009] The experimental alkaline water electrolysis cell is arranged in the environmental chamber, and the experimental alkaline water electrolysis cell can meet various experimental requirements by changing the flow field design, the size of the chamber, the heat dissipation and the cell body environmental temperature control components;

[0010] A direct current power supply is connected to the alkaline water electrolyzer used in the experiment to provide electrolytic power;

[0011] The hydrogen-side gas-liquid separation bottle and the oxygen-side gas-liquid separation bottle are both connected to the experimental alkaline water electrolyzer, and are used for gas-liquid separation of the electrolyzer outlet product and alkaline solution replenishment and storage;

[0012] A temperature measuring line, the temperature measuring end of which is arranged inside the alkaline water electrolysis cell for the experiment;

[0013] A paperless recorder is connected to the temperature measuring line and is used to process the electrical signal transmitted by the temperature measuring line and convert it into a temperature signal and record it;

[0014] The constant temperature water bath is used to heat the alkali solution, thereby adjusting and controlling the working temperature of the electrolytic cell.

[0015] Furthermore, the experimental bench system also includes an alkali solution circulation pump, the inlet end of the alkali solution circulation pump is respectively connected to the hydrogen side gas-liquid separation bottle and the oxygen side gas-liquid separation bottle, and the outlet end of the alkali solution circulation pump is connected to the alkali solution inlet end of the experimental alkaline water electrolyzer.

[0016] Furthermore, the experimental bench system also includes a computer terminal, which is communicatively connected to the DC power supply, the paperless recorder, and the alkali solution circulation pump respectively.

[0017] Furthermore, the computer terminal is used to obtain voltage and current data of the received DC power supply and temperature data of the paperless recorder, and is also used to control the DC power supply and the alkali solution circulation pump.

[0018] Furthermore, the experimental alkaline water electrolyzer comprises a shell, an internal flow field structure, and a chamber partition component, wherein specifically:

[0019] An internal flow field structure is disposed in the housing, the internal flow field structure comprising a guide plate structure that can be replaced or rearranged;

[0020] The chamber partition component includes a plurality of partition plates that can be added or removed. The volume of the electrolyte chamber and the distance between the electrodes can be changed by adding or removing the partition plates, so as to study the influence of different electrode parameters and chamber conditions on the electrolytic performance by changing the electrode layout and chamber scale.

[0021] Furthermore, the experimental alkaline water electrolysis cell also includes a heat-insulating layer arranged on the outer shell.

[0022] Furthermore, the bottle body capacity of the hydrogen side gas-liquid separation bottle and the oxygen side gas-liquid separation bottle is 2L-3L, the bottle cap is made of polytetrafluoroethylene material, and three holes are opened on the cover body, which are respectively used to introduce the gas-liquid mixture, exhaust the gas, and extract the alkaline solution, and the bottom of the hydrogen side gas-liquid separation bottle and the oxygen side gas-liquid separation bottle are opened and connected to each other through a connecting pipe to form a connector structure.

[0023] Furthermore, the temperature measuring wire is a K-type or T-type thermocouple.

[0024] Furthermore, the temperature measuring line extends from the inlet or outlet of the experimental alkaline water electrolysis cell into the internal flow field structure of the flow field.

[0025] Furthermore, the cover body is provided with a first through hole, a second through hole, and a third through hole for respectively introducing a gas-liquid mixture, discharging gas, and extracting alkaline solution, and the first through hole, the second through hole, and the third through hole are provided with a first conduit, a second conduit, and a third conduit respectively;

[0026] One end of the first conduit is inserted into the middle of the bottle body, and the other end is connected to the outlet of the experimental alkaline water electrolyzer;

[0027] One end of the second conduit is inserted into the upper part of the bottle body, and the other end is connected to the second conduit for exhausting gas;

[0028] One end of the third conduit is inserted into the lower part of the bottle body, and the other end is connected to the inlet of the alkali solution circulation pump.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1) The laboratory alkaline water electrolysis system of the present invention is easy to assemble and disassemble, and has stable and reliable operation. Its unique design can effectively decouple the key parameters that affect the efficiency of electrolytic hydrogen production, including load, temperature, flow rate, ambient temperature, etc. By accurately analyzing the sensitivity of these parameters to the electrochemical performance of the electrolyzer, the formulation of control strategies for actual industrial electrolytic hydrogen production systems can be accurately guided, which helps to improve the efficiency and stability of industrial hydrogen production, reduce energy consumption and costs, and optimize industrial production processes.

[0031] 2) The present invention successfully overcomes many difficulties faced by the inside of the electrolytic cell, such as high corrosion, conductivity, and sealing requirements. It adopts an innovative method of cleverly arranging temperature measuring lines in a small chamber, which not only realizes the accurate acquisition of dynamic temperature data inside the electrolytic cell, but also can deeply reveal the close correspondence between the temperature distribution inside the electrolytic cell and the operating conditions and electrochemical performance. This has an extremely important driving role in the in-depth study of the electrical, thermal and mass coupling relationship of alkaline water electrolytic cells, and provides key data support and practical basis for theoretical research and technological breakthroughs in related fields.

[0032] 3) The present invention has a high degree of flexibility and freedom, and can be flexibly modified in a variety of ways according to different scientific research and product development needs. For example, the scale of the electrolyzer can be easily changed to adapt to experimental research of different scales; and it can perfectly cooperate with computers and numerical control components to achieve effective verification of automatic control algorithms and other operations, so it is widely applicable to various scientific research work, such as performance testing of new electrodes, diaphragms, etc., as well as the optimization of the internal design of the electrolyzer in the process of product development and the development and improvement of the electrolytic hydrogen production control strategy, which has effectively promoted the innovation and development and application expansion in the field of alkaline water electrolysis technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall system structure of the present invention.

[0034] In the figure, 1 is an alkaline water electrolyzer for experiment, 2 is a DC power supply, 3 is a computer terminal, 4 is a paperless recorder, 5 is a constant temperature water bath, 6 is a hydrogen side gas-liquid separation bottle, 7 is an oxygen side gas-liquid separation bottle, 8 is an alkaline solution circulation pump, 9 is a temperature measuring line, 10 is an environmental box, 11 is a first conduit, 12 is a second conduit, and 13 is a third conduit.

[0035] Figure 2 Schematic diagram of the hole position of the gas-liquid separation bottle. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.

[0037] Example 1

[0038] The schematic diagram of the structure of the integrated experimental platform system for measuring the electrolytic performance and internal temperature of the alkaline water electrolyzer in this embodiment is shown in FIG. Figure 1 .

[0039] The experimental alkaline water electrolyzer 1 is used to control experimental variables such as electrolyzer design and tank body scale. Its scale is smaller than that of the actual electrolyzer, and it is easy to disassemble and assemble. The flow field and chamber scale can be designed by oneself, and it is easy to control heat dissipation and tank body ambient temperature. The experimental alkaline water electrolyzer 1 includes a shell, an internal flow field structure, and a chamber partition component, wherein specifically: the internal flow field structure is arranged in the shell, and the internal flow field structure includes a guide plate structure that can be replaced or rearranged; the chamber partition component includes a plurality of partition plates that can be added or removed, and the volume size of the electrolyte chamber and the spacing of the electrodes can be changed by adding or removing the partition plates, so as to study the influence of different electrode parameters and chamber conditions on the electrolytic performance by changing the electrode layout and chamber scale. The experimental alkaline water electrolyzer 1 also includes a thermal insulation layer arranged on the shell.

[0040] The DC power supply 2 is used to provide electrical energy to the experimental alkaline water electrolysis cell 1 .

[0041] The computer terminal 3 is used to collect power supply data corresponding to the electrochemical performance of the electrolytic cell and temperature data processed by the paperless recorder 4, and to control related components when the power supply and alkali solution circulation pump 8 are programmable or electrically controllable.

[0042] The paperless recorder 4 is used to process the electrical signal transmitted from the temperature measuring line 9 and convert it into a temperature signal and record it.

[0043] The constant temperature water bath 5 is used to heat the alkali solution and control the working temperature of the electrolytic cell 1 .

[0044] The hydrogen-side gas-liquid separation bottle 6 and the oxygen-side gas-liquid separation bottle 7 are used for gas-liquid separation of the electrolyzer outlet product and for supplementation and storage of alkali solution. The bottle body has a certain depth and a capacity of 2L-3L. The bottle cap is made of anti-corrosion material polytetrafluoroethylene. The cap body has three holes, which are used to introduce gas-liquid mixture, discharge gas, and extract alkali solution respectively. The bottoms of the two bottles are opened and connected to each other to form a connector.

[0045] The alkali solution circulation pump 8 is used for the circulation of alkali water in the experimental electrolysis system to control the flow rate. It requires corrosion resistance and controllable flow rate. It can be equipped with CNC digital display function or a combination of anti-corrosion hose and peristaltic pump.

[0046] The temperature measuring line 9 is used to convert the internal temperature of the electrolytic cell 1 into an electrical signal and input it into the recorder. A K-type or T-type thermocouple is selected, which is small in size, sensitive, and has an insulated and anti-corrosion surface. It is arranged in the flow field of the electrolytic cell 1, and the surface is anti-corrosion and insulated. The length is more than 20 cm, and it can be packaged with 0.05mm-0.1mm thick ultra-thin Teflon tape or embedded in an ultra-fine Teflon tube, and the port is sealed with epoxy resin glue.

[0047] During specific implementation, the holes for introducing the gas-liquid mixture into the hydrogen-side gas-liquid separation bottle 6 and the oxygen-side gas-liquid separation bottle 7 are connected to short tubes in the bottles, with the tube mouths located above the liquid surface; the holes for discharging gas can ensure that the pressure in the bottle is approximately equal to the atmospheric pressure and cooperate with the bottle body to control the liquid surface and replenish deionized water; the holes for extracting alkali solution are connected to long tubes in the bottle, with the tube mouths located in the middle and lower part from the liquid surface to the bottom of the bottle.

[0048] During specific implementation, the main body of the experimental alkaline water electrolytic cell 1 has a single-inlet and double-outlet or double-inlet and double-outlet liquid inlet and outlet. When it is a single-inlet and double-outlet, an alkali liquid circulation pump 8 is configured, and the alkali liquid circulation outlets of the hydrogen side and oxygen side gas-liquid separation bottles are connected through a three-way joint; when it is a double-inlet and double-outlet, two alkali liquid circulation pumps 8 are configured to respectively extract the alkali liquid in the bottle to complete the circulation.

[0049] During specific implementation, the overall piping material of the system can be PTFE hose or 316L steel pipe. If the alkali solution circulation pump 8 uses a peristaltic pump, the pipeline passing through the pump uses a special hose to resist friction and corrosion. If a mechanical anti-corrosion pump is used, the system can be built with a 316L steel pipe, and the pipeline can be coated with an insulation layer.

[0050] In specific implementation, the temperature measuring line 9 is arranged inside the flow field and is packaged with Teflon for corrosion protection and insulation. The packaging methods include Teflon tape packaging, Teflon capillary packaging, and Teflon film welding packaging. The temperature measuring lines processed by Teflon tape packaging and Teflon film welding can be directly clamped between the electrode plate and the sealing ring. The capillary packaging method requires opening a hole at the alkali solution inlet / outlet pipeline of the electrolytic cell 1.

[0051] In specific implementation, the paperless recorder 4 converts the electrical signal of the temperature measuring line 9 into a temperature value, and realizes dynamic temperature measurement by high-frequency sampling, and the recording interval is about 0.02s.

[0052] In specific implementation, the bottle capacity of the hydrogen side gas-liquid separation bottle 6 and the oxygen side gas-liquid separation bottle 7 is 2L-3L, the bottle cap is made of polytetrafluoroethylene material, and three holes are opened on the cover body, which are respectively used to introduce the gas-liquid mixture, exhaust the gas, and extract the alkaline solution. The bottom of the hydrogen side gas-liquid separation bottle 6 and the oxygen side gas-liquid separation bottle 7 have holes and are connected to each other through connecting pipes to form a connector structure.

[0053] In specific implementation, the environmental box 10 is used to control the ambient temperature around the electrolytic cell 1. The environmental box 10 is usually composed of a box shell to form a main frame, and its material has strength and heat insulation, such as metal or hard plastic material and rust-proof or insulation treatment; a temperature regulation system is provided in the box, including heating and cooling components such as electric heating wires, compressor refrigeration systems or semiconductor refrigeration sheets, and temperature sensors such as thermistors or thermocouples to achieve precise temperature control; a ventilation system is equipped with an air inlet, an air outlet and a fan, and an air filter is provided at the air inlet, and the fan can promote air circulation; an insulation layer such as foam plastic, rock wool or aerogel is provided between the inner wall or the shell and the interior to reduce heat transfer; and a control system including a control circuit board and an operation panel, the control circuit board integrates a variety of electronic components to run the temperature control algorithm, and the operation panel facilitates the experimenter to set the temperature, adjust the fan speed, and other operations.

[0054] The temperature measuring line 9 is a K-type or T-type thermocouple and extends from the inlet or outlet of the experimental alkaline water electrolyzer 1 to the internal flow field structure of the flow field.

[0055] For specific applications, see Figure 2The cover body is provided with a first through hole, a second through hole, and a third through hole for respectively introducing a gas-liquid mixture, discharging gas, and extracting alkali solution, and the first through hole, the second through hole, and the third through hole are provided with a first conduit 11, a second conduit 12, and a third conduit 13, respectively. One end of the first conduit 11 is inserted into the middle of the bottle body, and the other end is connected to the outlet of the experimental alkaline water electrolyzer 1; one end of the second conduit 12 is inserted into the upper part of the bottle body, and the other end is connected to the outlet of the experimental alkaline water electrolyzer 1 for discharging gas; one end of the third conduit 13 is inserted into the lower part of the bottle body, and the other end is connected to the inlet of the alkali solution circulation pump 8. The bottom openings of the hydrogen side gas-liquid separation bottle 6 and the oxygen side gas-liquid separation bottle 7 are connected to each other through a connecting pipe to form a connector structure.

[0056] When applying specific Figure 1 As shown, the electrolytic performance and internal temperature measurement integrated experimental bench of the alkaline water electrolyzer in the present invention includes two parts: electrochemical performance test and internal temperature measurement. The former includes an experimental alkaline water electrolyzer 1, a DC power supply 2, a computer terminal 3, a constant temperature water bath 5, a hydrogen side gas-liquid separation bottle 6, an oxygen side gas-liquid separation bottle 7, an alkaline solution circulation pump 8, and an environmental box 10; the latter includes a paperless recorder 4 and a temperature measuring line 9. The inlet and outlet of the alkaline water electrolyzer 1 for the main laboratory is single-inlet and double-outlet or double-inlet and double-outlet. The former can be equipped with only one alkaline solution circulation pump 8, and the outlets for the circulation of the hydrogen side and oxygen side gas-liquid separation bottles need to be connected through a three-way joint. Because the vent makes the air pressure in the bottle consistent with the outside world, the alkaline solution circulation pump can normally extract the alkaline solution in the bottle and complete the circulation of the alkaline solution; and because a connecting pipe is connected between the gas-liquid separation bottles, the liquid levels of the alkaline solutions in the two bottles can always remain consistent to support long-term testing. If the inlet and outlet are double-inlet and double-outlet, two alkali solution circulation pumps 8 can be configured to extract the alkali solution in the bottle to complete the circulation. The overall pipeline material of the system can be selected from PTFE hose or 316L steel pipe. If the alkali solution circulation pump 8 uses a peristaltic pump, the pipeline passing through the pump must use a special hose to resist friction and corrosion, such as a fluororubber tube; if a mechanical anti-corrosion pump is used, the system can be built with a 316L steel pipe. In order to reduce the influence of the pipeline on the alkali solution temperature, the pipeline can be coated with an insulation layer, such as an aerogel layer, a glass fiber layer, etc. In the test system, the alkali solution temperature is mainly regulated by a constant temperature water bath 5, and the ambient temperature is controlled by an environmental box 10. Power supply and data collection are respectively realized by a DC power supply 2 and a computer terminal 3. For small electrolytic cells (the electrolysis current demand is less than the power supply capacity of the electrochemical workstation), an electrochemical workstation can be used instead of a DC power supply and a computer. The electrochemical test part can realize polarization curve testing. The controllable variables include reaction temperature, alkaline solution flow rate, ambient temperature, reaction current, and can realize long-term electrode and diaphragm stability and life testing to meet the research and development needs of alkaline water electrolyzers.

[0057] In specific applications, the temperature measurement part of the integrated experimental bench proposed by the present invention includes a paperless recorder 4 and a temperature measuring line 9. By arranging measuring points inside the flow field, the temperature of the reaction area can be accurately measured. The temperature measuring line arranged inside the flow field needs to overcome the corrosiveness of the alkali solution, and the sealing of the electrolytic cell and the insulation of the temperature measuring line itself must be ensured. It can be packaged with insulating materials such as Teflon, and the methods include Teflon tape packaging, Teflon thin tubes, Teflon film welding, etc. The temperature measuring line processed by the tape packaging method and the film welding method can be directly clamped between the electrode plate and the sealing ring, which has little effect on the sealing, is simple to install, and is suitable for short-time measurement; the thin tube packaging method has high reliability, but in order to ensure the sealing, it cannot be directly clamped between the electrode plate and the sealing ring, and it is necessary to open a hole at the inlet / outlet pipeline of the electrolytic cell alkali solution. The paperless recorder 4 can convert the electrical signal of the temperature measuring line 9 into a temperature value, and high-frequency sampling can realize dynamic temperature measurement.

[0058] In summary, the alkaline water electrolyzer integrated experimental bench proposed in the present invention can realize the electrochemical performance and internal temperature measurement of the alkaline water electrolyzer, multiple variables are controllable, and it can run for a long time, basically meeting the experimental and R&D needs.

[0059] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. An integrated test bench system for measuring the electrolytic performance and internal temperature of an alkaline water electrolyzer, characterized in that: include: Environmental chamber (10); The experimental alkaline water electrolysis cell (1) is arranged in the environmental box (10), and the experimental alkaline water electrolysis cell (1) can meet various experimental requirements by changing the flow field design, the size of the chamber, the heat dissipation and the cell body environmental temperature control components; A direct current power supply (2) is connected to the experimental alkaline water electrolysis cell (1) to provide electrolytic power; The hydrogen-side gas-liquid separation bottle (6) and the oxygen-side gas-liquid separation bottle (7) are both connected to the experimental alkaline water electrolyzer (1) and are used for gas-liquid separation of the electrolyzer outlet product and for alkaline solution replenishment and storage; A temperature measuring line (9), the temperature measuring end of which is arranged inside the experimental alkaline water electrolysis cell (1); A paperless recorder (4) is connected to the temperature measuring line (9) and is used to process the electrical signal transmitted by the temperature measuring line (9) and convert it into a temperature signal and record it; The constant temperature water bath (5) is used to increase the temperature of the alkali solution, thereby adjusting and controlling the working temperature of the electrolytic cell (1).

2. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 1, characterized in that: The experimental bench system further comprises an alkali solution circulation pump (8), the inlet end of the alkali solution circulation pump (8) being respectively connected to the hydrogen side gas-liquid separation bottle (6) and the oxygen side gas-liquid separation bottle (7), and the outlet end of the alkali solution circulation pump (8) being connected to the alkali solution inlet end of the experimental alkaline water electrolyzer (1).

3. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 2, characterized in that: The experimental platform system also includes a computer terminal (3), and the computer terminal (3) is respectively connected to the DC power supply (2), the paperless recorder (4), and the alkali solution circulation pump (8) for communication.

4. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 3, characterized in that: The computer terminal (3) is used to obtain voltage and current data of the DC power supply (2) and temperature data of the paperless recorder (4), and is also used to control the DC power supply (2) and the alkali solution circulation pump (8).

5. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 2, characterized in that: The experimental alkaline water electrolyzer (1) comprises: shell; An internal flow field structure, disposed in the housing, the internal flow field structure comprising a guide plate structure that can be replaced or rearranged; The chamber partition component includes a plurality of partition plates that can be added or removed. The volume of the electrolyte chamber and the distance between the electrodes can be changed by adding or removing the partition plates, so as to study the influence of different electrode parameters and chamber conditions on the electrolytic performance by changing the electrode layout and chamber scale.

6. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 5, characterized in that: The experimental alkaline water electrolysis cell (1) further comprises a heat-insulating layer arranged on the outer shell.

7. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 1, characterized in that: The hydrogen-side gas-liquid separation bottle (6) and the oxygen-side gas-liquid separation bottle (7) have a bottle body capacity of 2L-3L, and the bottle cap is made of polytetrafluoroethylene material. Three holes are provided on the cap body, which are used to introduce a gas-liquid mixture, discharge gas, and extract alkali liquid respectively. The hydrogen-side gas-liquid separation bottle (6) and the oxygen-side gas-liquid separation bottle (7) have holes at the bottom of the bottles and are connected to each other through a connecting pipe to form a connector structure.

8. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 1, characterized in that: The temperature measuring wire (9) is a K-type or T-type thermocouple.

9. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 5, characterized in that: The temperature measuring line (9) extends from the inlet or outlet of the experimental alkaline water electrolysis cell (1) to the internal flow field structure of the flow field.

10. The alkaline water electrolyzer electrolysis performance and internal temperature measurement integrated test bench system according to claim 7, characterized in that: The cover body is provided with a first through hole, a second through hole and a third through hole respectively used for introducing a gas-liquid mixture, exhausting gas and extracting alkaline solution, and the first through hole, the second through hole and the third through hole are respectively provided with a first conduit (11), a second conduit (12) and a third conduit (13); One end of the first conduit (11) is inserted into the middle of the bottle body, and the other end is connected to the outlet of the experimental alkaline water electrolysis cell (1); One end of the second conduit (12) is inserted into the upper part of the bottle body, and the other end is connected to the second conduit for exhausting gas; One end of the third conduit (13) is inserted into the lower part of the bottle body, and the other end is connected to the inlet of the alkali solution circulation pump (8).

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