External temperature-controlled electrolyzer pole frame and electrolyzer for producing hydrogen by electrolysis of water

Abstract

The present invention provides an external temperature-controlled electrolytic cell pole frame and an electrolytic cell for electrolysis of water to produce hydrogen, and relates to the technical field of electrolytic cells. The external temperature-controlled electrolytic cell pole frame for electrolysis of water to produce hydrogen includes a frame, a heat exchange flow channel, a sealing groove, a first through hole and a second through hole; the heat exchange flow channel is provided inside the frame for passing a heat exchange medium; the sealing groove is provided on the front and rear sides of the frame and is concentric with the frame; the frame is an annular frame, and the number of sealing grooves on each side of the frame is multiple, which are concentric with the frame and distributed in concentric circles; the first through hole and the second through hole are through-opened at the sealing groove of the frame and are connected to the heat exchange flow channel, and the layout position of the heat exchange flow channel corresponds to the layout position of the sealing groove. The first through hole of the present invention is connected to an external temperature source, and the heat exchange medium is discharged from the second through hole after passing through the heat exchange flow channel in the frame, completing the heat exchange process, and can quickly heat or cool the pole frame, thereby realizing the temperature control of the electrolytic cell.

Description

Technical Field

[0001] The present application relates to the technical field of electrolyzers, and in particular to an external temperature-controlled electrolyzer pole frame and an electrolyzer for producing hydrogen by electrolyzing water. Background Art

[0002] With the continuous development of new energy power generation capacity, the price of green electricity has gradually decreased, the economic benefits of hydrogen production by alkaline water electrolysis have gradually become prominent, the demand for hydrogen production equipment has increased rapidly, and the specifications of electrolyzers have also rapidly expanded to more than 1,500 standard cubic meters per hour.

[0003] The rated operating temperature of the alkaline water electrolysis hydrogen production system is generally 70~90℃. In the prior art, the rated operating temperature is often reached by the heat generated by the electrolyzer itself during operation. Therefore, its cold start time is often more than 2 hours, resulting in a large amount of energy and time waste during debugging and repeated start and stop. In addition, the cooling of the electrolyzer can only be achieved through natural heat dissipation, and there is no effective auxiliary heat dissipation measure.

[0004] Therefore, we propose an external temperature-controlled electrolyzer pole frame and electrolyzer for producing hydrogen by electrolysis of water to shorten the cold start time and cooling time of the electrolyzer. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present application provides an external temperature-controlled electrolytic cell pole frame and an electrolytic cell for electrolyzing water to produce hydrogen, which has the advantage of effectively shortening the cold start time and cooling time of the electrolytic cell.

[0006] In order to achieve the above-mentioned purpose of effectively shortening the cold start time and cooling time of the electrolytic cell, the present application provides the following technical solutions:

[0007] On the one hand, the present application provides an external temperature-controlled electrolytic cell pole frame for electrolyzing water to produce hydrogen, comprising a frame body, a heat exchange flow channel, a sealing groove, a first through hole and a second through hole;

[0008] The heat exchange flow channel is opened inside the frame and is used to pass the heat exchange medium;

[0009] The sealing groove is arranged on the front and rear sides of the frame and is concentric with the frame;

[0010] The frame is an annular frame, and the number of sealing grooves on each side of the frame is multiple, which are concentric with the frame and distributed in concentric circles;

[0011] The first through hole and the second through hole are opened through the sealing groove of the frame and are connected with the heat exchange flow channel. The layout position of the heat exchange flow channel corresponds to the layout position of the sealing groove.

[0012] As an optional solution of the present application, the first through hole is through-opened in the lower part of the frame, and the second through hole is through-opened in the upper part of the frame.

[0013] As an optional solution of the present application, the heat exchange channel is an annular channel, which is closed and opened inside the frame, and the first through hole and the second through hole are vertically connected to the annular channel.

[0014] As an optional solution of the present application, two adjacent frames are sealed by a sealing gasket.

[0015] As an optional solution of the present application, the sealing gasket is a thermally conductive sealing gasket.

[0016] As an optional solution of the present application, the number of sealing grooves on each side of the frame is 6 to 12, the spacing between two adjacent sealing grooves is 1 to 2 mm, and the distance between the outermost sealing groove and the outer frame of the frame is 2 to 5 mm.

[0017] As an optional solution of this application, it also includes:

[0018] The liquid inlet channel is opened through the bottom of the frame;

[0019] The oxygen through hole and the hydrogen through hole are opened through the top of the frame.

[0020] As an optional solution of the present application, both sides of the inner ring of the frame are concave to form a plate step;

[0021] The outer edge of one of the pole plate steps is also concave to form a diaphragm step.

[0022] As an optional solution of the present application, the side walls of the two electrode plate steps are both connected to the liquid inlet channel;

[0023] The two electrode plate steps are respectively connected to the oxygen through hole and the hydrogen through hole.

[0024] On the other hand, the present application also provides an electrolyzer having an external temperature-controlled electrolyzer pole frame for producing hydrogen by electrolyzing water as provided above.

[0025] Compared with the prior art, the present application provides an external temperature-controlled electrolytic cell pole frame and an electrolytic cell for electrolyzing water to produce hydrogen, which has the following beneficial effects:

[0026] 1. The present application sets a heat exchange channel inside the frame, and connects the external temperature source through the first through hole and the second through hole, so that the cooling or heating heat exchange medium can flow in the heat exchange channel inside the frame. Through this design, the electrolytic cell does not need to rely on its own running heat to reach the working temperature when starting, but can be directly heated or cooled by an external temperature source. This method greatly shortens the cold start time and solves the problem of long cold start time in the prior art. The first through hole is connected to the external temperature source, and the heat exchange medium is discharged from the second through hole after passing through the heat exchange channel in the frame to complete the heat exchange process, which can achieve the purpose of quickly heating or cooling the pole frame, thereby realizing the temperature control of the electrolytic cell. In addition, the existence of the heat exchange channel allows the temperature to be more evenly distributed throughout the frame, avoiding the problem of uneven temperature distribution and improving the temperature control accuracy.

[0027] 2. The external temperature-controlled electrolytic cell pole frame used for electrolysis of water to produce hydrogen, the heat exchange medium is introduced through the first through hole, flows through the heat exchange flow channel of each pole frame and is discharged from the second through hole to complete the heat exchange process, which can achieve the purpose of quickly heating or cooling the pole frame, and can realize unified control of the temperature of the entire electrolytic cell without the need to individually adjust the pole frame temperature.

[0028] 3. The present application is also provided with sealing grooves, which are distributed on both sides of the frame and are designed concentrically with the frame. There are multiple sealing grooves on each side, which are distributed in concentric circles. This multi-layer sealing groove design effectively enhances the contact area between the sealing gasket between the frame and the adjacent frame, so that the sealing gasket can bend in a corrugated shape under pressure to form a tighter sealing effect. Compared with the simple single-layer sealing structure in the prior art, this multi-level sealing design can effectively prevent the leakage of electrolyte or gas, so that the electrolytic cell can be better sealed for a long time. In addition, the first through hole and the second through hole are opened at the sealing groove, so that the inlet and outlet of the heat exchange channel are closely combined with the sealing structure, further reducing the risk of leakage caused by temperature or pressure fluctuations.

[0029] 4. The frame of the present application is set as an annular frame, and the sealing grooves are distributed in the form of concentric circles. This structural layout not only helps to improve the sealing effect, but also can significantly enhance the overall structural strength of the frame. The frame with an annular frame structure can disperse the pressure more evenly when multiple points are stressed, avoiding local force concentration, and is more suitable for long-term use in high temperature and high pressure environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A three-dimensional schematic diagram of the overall structure of this application Figure 1 ;

[0032] Figure 2 A three-dimensional schematic diagram of the overall structure of this application Figure 2 ;

[0033] Figure 3 A cross-sectional view of the frame portion of the present application;

[0034] Figure 4 Schematic diagram of other forms of heat exchange channels in this application.

[0035] In the figure: 1, frame; 2, sealing groove; 3, first through hole; 4, second through hole; 5, annular flow channel; 6, liquid inlet channel; 7, oxygen through hole; 8, hydrogen through hole; 9, diaphragm step; 10, plate step. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] See also Figure 1-Figure 3 The embodiment of the present application provides an external temperature-controlled electrolytic cell pole frame for electrolyzing water to produce hydrogen, including a frame body 1, a heat exchange flow channel, a sealing groove 2, a first through hole 3 and a second through hole 4. Specifically:

[0041] The heat exchange flow channel is opened inside the frame 1 and is used for passing heat exchange medium.

[0042] The sealing groove 2 is disposed at the front and rear sides of the frame 1 and is concentric with the frame 1 .

[0043] The frame 1 is an annular frame, which is suitable for pressure-type water electrolysis hydrogen production equipment. The specific material can be selected from metal materials resistant to alkali corrosion, such as titanium plates, carbon steel nickel-plated plates with a nickel coating thickness of 30 to 80 microns. The use of corrosion-resistant metal materials (such as titanium plates or carbon steel nickel-plated plates) can improve the ability to resist alkali corrosion, thereby extending the service life of the equipment.

[0044] There are multiple sealing grooves 2 on each side of the frame 1 , which are concentric with the frame 1 and distributed in concentric circles.

[0045] The first through hole 3 and the second through hole 4 are formed on the frame 1. Specifically, the first through hole 3 and the second through hole 4 are formed at the sealing groove 2 of the frame 1 and are connected to the heat exchange channel. The layout position of the heat exchange channel corresponds to the layout position of the sealing groove 2. The first through hole 3 is connected to the external temperature source. The heat exchange medium is discharged from the second through hole 4 after passing through the heat exchange channel in the frame 1 to complete the heat exchange process, so as to achieve the purpose of quickly heating or cooling the pole frame, thereby realizing the temperature control of the electrolytic cell. Moreover, in this embodiment, the first through hole 3 and the second through hole 4 are formed at the sealing groove 2, so that the inlet and outlet of the heat exchange channel are closely combined with the sealing structure, which can further reduce the risk of leakage caused by temperature or pressure fluctuations.

[0046] In the embodiment of the present application, a heat exchange channel is arranged inside the frame 1, and an external temperature source is connected through the first through hole 3 and the second through hole 4, so that the cooling or heating heat exchange medium can flow in the heat exchange channel inside the frame. Through this design, the electrolytic cell does not need to rely on its own running heat to reach the working temperature when starting, but can be directly heated or cooled by an external temperature source. This method greatly shortens the cold start time and solves the problem of long cold start time in the prior art. In addition, the presence of the heat exchange channel allows the temperature to be more evenly distributed throughout the frame, avoiding the problem of uneven temperature distribution and improving the temperature control accuracy. Moreover, while the heat exchange channel allows the frame 1 to heat up and cool down sufficiently and evenly, it also effectively reduces the overall weight of the frame, which is conducive to achieving lightweight frame 1.

[0047] In addition, in the external temperature-controlled electrolytic cell pole frame used for electrolysis of water to produce hydrogen, the heat exchange medium is introduced through the first through hole 3, flows through the heat exchange flow channels of each pole frame, and is discharged from the second through hole 4, which can achieve unified control of the temperature of the entire electrolytic cell without the need to individually adjust the pole frame temperature.

[0048] At the same time, the present application is also provided with a sealing groove 2, which is distributed on both sides of the frame 1 and is designed concentrically with the frame 1. The number of sealing grooves 2 on each side is multiple and is distributed in concentric circles. The design of this multi-layer sealing groove 2 effectively enhances the contact area between the sealing gasket between the frame 1 and the adjacent frame 1, so that the sealing gasket can bend in a corrugated shape under pressure to form a tighter sealing effect. Compared with the simple single-layer sealing structure in the prior art, this multi-level sealing design can effectively prevent the leakage of electrolyte or gas, so that the electrolytic cell can be better sealed for a long time. In addition, the first through hole 3 and the second through hole 4 are opened at the sealing groove 2, so that the inlet and outlet of the heat exchange flow channel are closely combined with the sealing structure, further reducing the risk of leakage caused by temperature or pressure fluctuations.

[0049] In some embodiments, the frame 1 of the embodiment of the present application is configured as an annular frame, and the sealing grooves 2 are distributed in the form of concentric circles. This structural layout not only helps to improve the sealing effect, but also can significantly enhance the overall structural strength of the frame. The frame 1 with an annular frame structure can disperse the pressure more evenly when multiple points are stressed, avoiding local stress concentration, and is more suitable for long-term use in high temperature and high pressure environments.

[0050] In some embodiments, the first through hole 3 is formed through the lower part of the frame 1, and the second through hole 4 is formed through the upper part of the frame 1. This design method realizes the flow of the heat exchange medium from bottom to top, conforms to the physical principle of thermal convection, helps to complete the heat exchange process more effectively, and thus shortens the cold start time of the electrolytic cell.

[0051] After several frames 1 are assembled together, the heat exchange medium enters from the first through hole 3, flows through the heat exchange flow channel of each pole frame, and is discharged from the second through hole 4, so that the temperature of the entire electrolytic cell can be uniformly controlled without the need to individually adjust the pole frame temperature.

[0052] During use, the heat exchange medium enters from the first through hole 3 at the bottom, flows through the heat exchange channel, and then is discharged from the second through hole 4 at the top. When used for heat dissipation, the cooling medium enters from the bottom, gradually absorbs heat and rises to the top before being discharged. This flow direction can utilize the thermal convection effect to make cooling more efficient. When used for heating, the heat medium enters from the bottom, gradually releases heat and cools down before rising to the top before being discharged. This flow direction also conforms to the principle of thermal convection and helps to uniformly heat.

[0053] In addition, the flow direction of the heat exchange medium entering from the bottom and exiting from the top also helps to maintain a stable flow, avoiding the formation of vortices or stagnant areas in the heat exchange flow channel, thereby improving the overall heat exchange efficiency. At the same time, it can also effectively avoid the accumulation of bubbles or sediments, and the bubbles or sediments can be discharged together with the heat exchange medium.

[0054] In some embodiments, Figure 3 As shown, the heat exchange flow channel is an annular flow channel 5, which is closed and opened inside the frame 1, and the first through hole 3 and the second through hole 4 are vertically connected to the annular flow channel 5. After the heat exchange medium enters from the first through hole 3, it flows through the annular flow channel 5 and then is discharged from the second through hole 4.

[0055] In this embodiment, an improved heat exchange flow channel is provided, and the heat exchange flow channel adopts an annular flow channel 5. Through the annular design of the heat exchange flow channel, the heat exchange medium can evenly cover various areas inside the frame 1, so as to achieve uniform heating or cooling of the entire frame 1. This method avoids the phenomenon of local temperature being too high or too low, is conducive to ensuring the consistency of temperature in the entire electrolytic cell, effectively shortens the cold start time, and improves the accuracy of temperature control during the electrolysis process. For example, by heating with an external temperature source, the inside of the electrolytic cell can be heated to a rated operating temperature of 70-90°C in a short time, avoiding energy waste during the cold start process and significantly improving the startup efficiency.

[0056] In this embodiment, the structural design in which the first through hole 3 and the second through hole 4 are vertically connected to the annular flow channel 5 can enhance the heat exchange efficiency, flow stability, and prevent the accumulation of bubbles and sediments. Specifically, the first through hole 3 and the second through hole 4 are vertically connected to the annular flow channel 5, so that the heat exchange medium can quickly change the flow direction when entering and exiting the annular flow channel 5 and directly enter the heat exchange area. This vertical connection design can effectively reduce the residence time of the heat exchange medium in the flow channel, so that heat is transferred to the entire electrolytic cell structure more quickly. Compared with the structure of entering the flow channel horizontally or parallel, the vertical connection can reduce the pressure loss in the path and improve the heat exchange efficiency, so that the electrolytic cell can reach the required operating temperature faster, thereby shortening the cold start time.

[0057] In addition, the vertically connected structural design enables the heat exchange medium to form a vertical inflow flow state when entering the annular flow channel 5, which helps to reduce the turbulence and eddy current phenomenon inside the flow channel, thereby maintaining a stable fluid flow. In addition, the vertical flow mode can effectively avoid the accumulation of bubbles and sediments in the annular flow channel, prevent the flow blockage caused by bubble aggregation or sediment accumulation, and ensure the smooth circulation of the heat exchange medium. Moreover, this design has a significant effect on improving the heat exchange efficiency and maintaining the cleanliness of the flow channel.

[0058] Optionally, see Figure 4 On the basis of the above embodiments, the heat exchange flow channel can be set not only in a ring shape, but also in a serpentine shape, a coil shape, etc., to extend the flow path of the heat exchange medium and improve the heat exchange effect.

[0059] In some embodiments, two adjacent frames 1 are sealed by a sealing gasket.

[0060] When in use, two adjacent frames 1 are sealed by a sealing gasket, and the sealing groove 2 is provided so that the sealing gasket sandwiched between the two frames 1 can be bent in a corrugated state, thereby improving the sealing strength.

[0061] The sealing groove 2 of this embodiment not only improves the sealing effect of the sealing gasket, so that the heat exchange medium transfers temperature in a sealed state, but also increases the contact area between two adjacent frames 1, which can better transfer heat.

[0062] In some embodiments, the sealing gasket is a heat-conducting sealing gasket. The sealing gasket is a heat-conducting sealing gasket, so that the temperature between each frame 1 can be better transferred and balanced, and then, a better cooling or heating effect can be obtained through the flow of the heat exchange medium in the heat exchange flow channel. Optionally, the heat-conducting sealing gasket is a graphite composite sealing gasket. Since the graphite composite sealing gasket is composed of expanded graphite and a metal layer (such as stainless steel or nickel), it not only has good thermal conductivity, but also can effectively resist the corrosion of alkaline electrolytes. At the same time, this sealing gasket has good flexibility and can fit tightly with the sealing groove of the frame to enhance the sealing effect.

[0063] During the heat exchange process, a thermally conductive sealing gasket is used to seal and connect multiple frames 1, ensuring that the heat exchange medium transfers temperature between multiple frames to achieve better temperature control effect. The application of thermally conductive sealing gaskets can further facilitate the uniform temperature transfer between the frames, avoiding the phenomenon of excessively high or low temperature of a single frame. The advantage of this design is that through the thermal conductivity of the sealing gasket, the heat exchange medium can quickly transfer heat to the adjacent frame, thereby optimizing the temperature control of the entire electrolytic cell.

[0064] Moreover, the design of combining the sealing groove 2 with the heat-conductive sealing gasket helps to improve the overall structural strength of the electrolytic cell, reduce the aging problem of the sealing gasket caused by high temperature, and thus extend the service life of the equipment. Specifically, the following aspects play a key role in enhancing the structural strength:

[0065] 1. Concentric circle distribution design of sealing grooves: Multiple concentric circle distribution sealing grooves 2 are set on both sides of the frame 1. This design forces the sealing gasket between two adjacent frames to be in a corrugated bending state. This structure increases the stability of the sealing gasket when under pressure, effectively reduces the displacement of the sealing gasket under high pressure, and enables the entire electrolytic cell to maintain structural integrity under multiple pressures, thereby improving the overall structural strength.

[0066] 2. Use of thermally conductive sealing pads: Thermally conductive sealing pads not only have thermal conductivity, but also have good high temperature resistance. They will not age or fail rapidly in high temperature environments, avoiding material fatigue caused by thermal expansion or cold contraction. Instead, they can maintain a close connection between frames for a long time and provide a stable support structure. In addition, thermally conductive sealing pads can achieve uniform temperature distribution by heat conduction when multiple frames are stacked, avoiding stress concentration caused by local thermal expansion, thereby reducing thermal stress between frames, and further enhancing the strength and stability of the overall structure; and sealing grooves 2 are set on both sides of the frame 1, and the two adjacent frames 1 are sealed by sealing pads, so that the sealing pads can fit more closely with the surface of the frame, which can reduce the impact of thermal expansion on the sealing pads in high temperature environments, and also reduce the wear rate of the sealing pads. The close fit between the sealing pads and the frame also helps to disperse and absorb mechanical pressure from the outside, further improving the durability of the overall structure.

[0067] From the above, it can be seen that the design adopted in the present application is conducive to long-term stable operation under high temperature or high pressure environment, thereby extending the service life of the electrolytic cell.

[0068] In some embodiments, the number of sealing grooves 2 on each side of the frame 1 is 6 to 12, the distance between two adjacent sealing grooves 2 is 1 to 2 mm, and the distance between the outermost sealing groove 2 and the outer frame of the frame 1 is 2 to 5 mm.

[0069] The spacing between two adjacent sealing grooves is 1-2 mm, and the distance between the outermost sealing groove and the outer frame of the frame is 2-5 mm. Such a spacing design provides a multi-level buffer space. The reasonable spacing between the sealing grooves 2 not only ensures the uniform distribution of the sealing gasket when under pressure, but also provides an effective buffer area for the thermal expansion of the frame under high temperature working environment. Specifically, this arrangement of the sealing grooves 2 can reduce the deformation and stress concentration caused by expansion when the thermal stress increases, thereby further improving the stability of the overall structure of the electrolytic cell under extreme temperature conditions.

[0070] Through this multi-layer sealing structure and reasonable spacing design, this embodiment enables the electrolytic cell to adapt to the new energy industry's demand for large-scale electrolytic cells (such as more than 1500 standard cubic meters per hour), greatly extending the service life of the electrolytic cell and significantly improving the operating reliability of the equipment under high temperature and high pressure conditions.

[0071] In some embodiments, Figure 1 and Figure 2 As shown, the pole frame of the external temperature-controlled electrolytic cell for producing hydrogen by electrolyzing water in the embodiment of the present application further includes a liquid inlet channel 6, an oxygen through hole 7 and a hydrogen through hole 8.

[0072] The liquid inlet channel 6 is provided through the bottom of the frame 1 and is used for introducing electrolyte.

[0073] The oxygen through hole 7 and the hydrogen through hole 8 are opened through the top of the frame 1 . The oxygen through hole 7 and the hydrogen through hole 8 are symmetrical and are used to discharge oxygen and hydrogen respectively.

[0074] In some embodiments, both sides of the inner ring of the frame 1 are concave to form a plate step 10 for welding the plate; the outer edge of one of the plate steps 10 is also concave to form a diaphragm step 9 for installing the diaphragm. In this embodiment, the concave design of the plate step 10 at the inner ring of the frame 1 and the provision of the diaphragm step 9 ensure that the electrolyte flows smoothly in the electrolytic cell, which helps to reduce the turbulence phenomenon in the electrolytic cell.

[0075] In some embodiments, see Figure 1 and Figure 2 The side walls of the two plate steps 10 are both connected to the liquid inlet channel 6; the two plate steps 10 are respectively connected to the oxygen through hole 7 and the hydrogen through hole 8. In this embodiment, the width of the diaphragm step 9 is 3-6 mm, and the width of the plate step is 10-20 mm.

[0076] When in use, the external temperature-controlled electrolytic cell pole frame for electrolyzing water to produce hydrogen, the electrolyte enters the cathode and anode chambers through the liquid inlet channel 6, and leaves from the oxygen through hole 7 and the hydrogen through hole 8 with the gas generated by the electrolysis of water, and the water decomposition process is continuously performed; the first through hole 3 at the lower part of the pole frame is connected to the external temperature source 4, and the heat exchange medium is discharged from the second through hole 4 after passing through the heat exchange flow channel in the frame 1, completing the heat exchange process, and can achieve the purpose of quickly heating or cooling the pole frame, thereby realizing the temperature control of the electrolytic cell.

[0077] In this embodiment, by providing the electrode plate step 10 and the diaphragm step 9, the electrode plate and the diaphragm can be stably installed in the electrolytic cell, thereby ensuring that the electrolyte flows evenly in the cathode and anode chambers and improving the water decomposition efficiency. At the same time, the provision of the diaphragm step 9 also helps to enhance the sealing between the diaphragm and the frame 1, avoid leakage of the electrolyte, and improve the overall stability of the electrolytic cell.

[0078] In addition, the embodiment of the present application also provides an electrolytic cell having an external temperature-controlled electrolytic cell pole frame for electrolyzing water to produce hydrogen as described in the above embodiment. Specifically, the electrolytic cell is composed of more than one electrolytic unit; the pole plate is welded to the frame 1 to form a bipolar plate, and each electrolytic unit is mainly composed of two bipolar plates, a gas-blocking and water-permeable diaphragm and a sealing gasket. The diaphragm is laid on the diaphragm step 9. The two bipolar plates are stacked in the same direction to form a cathode electrolysis chamber and an anode electrolysis chamber, and the sealing gasket is sandwiched between the two bipolar plates.

[0079] An electrolytic cell is obtained by repeatedly stacking more than one electrolytic unit, sandwiching a sealing gasket between every two electrolytic units, and pressing them with fasteners.

[0080] In the electrolytic cell, each first through hole 3 is connected, and each second through hole 4 is also connected. The heat exchange medium enters through the first through hole 3, flows through the heat exchange flow channel of each pole frame, and is discharged from the second through hole 4, so that the temperature of the entire electrolytic cell can be uniformly controlled.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An external temperature-controlled electrolytic cell pole frame for electrolyzing water to produce hydrogen, characterized in that: It comprises a frame (1), a heat exchange channel, a sealing groove (2), a first through hole (3) and a second through hole (4); The heat exchange flow channel is provided inside the frame (1) and is used for passing a heat exchange medium; The sealing groove (2) is arranged at the front and rear sides of the frame (1) and is concentric with the frame (1); The frame (1) is an annular frame, and the number of the sealing grooves (2) on each side of the frame (1) is multiple, and they are concentric with the frame (1) and distributed in concentric circles; The first through hole (3) and the second through hole (4) are formed through the sealing groove (2) of the frame (1) and are connected to the heat exchange flow channel; the layout position of the heat exchange flow channel corresponds to the layout position of the sealing groove (2); The first through hole (3) is formed through the lower part of the frame (1), and the second through hole (4) is formed through the upper part of the frame (1); The heat exchange flow channel is an annular flow channel (5) which is closed and opened inside the frame (1); the first through hole (3) and the second through hole (4) are vertically connected to the annular flow channel (5); Two adjacent frames (1) are sealed by a sealing gasket; The sealing gasket is a heat conductive sealing gasket; The number of the sealing grooves (2) on each side of the frame (1) is 6 to 12, the distance between two adjacent sealing grooves (2) is 1 to 2 mm, and the distance between the outermost sealing groove (2) and the outer frame of the frame (1) is 2 to 5 mm.

2. The external temperature-controlled electrolytic cell pole frame for producing hydrogen by electrolysis of water according to claim 1, characterized in that: Also includes: A liquid inlet channel (6) is provided through the bottom of the frame (1); The oxygen through hole (7) and the hydrogen through hole (8) are formed through the top of the frame (1).

3. The external temperature-controlled electrolytic cell pole frame for producing hydrogen by electrolysis of water according to claim 2, characterized in that: Both sides of the inner ring of the frame (1) are concave to form a pole plate step (10); The outer edge of one of the electrode plate steps (10) is further recessed to form a diaphragm step (9).

4. The external temperature-controlled electrolytic cell pole frame for producing hydrogen by electrolysis of water according to claim 3, characterized in that: The side walls of the two electrode plate steps (10) are both connected to the liquid inlet channel (6); The two electrode plate steps (10) are respectively connected to the oxygen through hole (7) and the hydrogen through hole (8).

5. An electrolytic cell, characterized in that: The invention provides an external temperature-controlled electrolytic cell pole frame for producing hydrogen by electrolyzing water as claimed in any one of claims 1 to 4.

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