Pole frame, pole plate and electrolytic bath
By setting insulating components at the runner holes and runner grooves of the pole frame, the problem of leakage current of the pole frame is solved, the electrolytic efficiency is improved and energy consumption is reduced, and a more efficient electrolytic process is achieved.
Patent Information
- Application Number
- CN202422350225.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The existing pole frame has leakage current during electrolysis, resulting in low current efficiency and high energy consumption, and increasing the cost of hydrogen production.
Insulating components are arranged at the runner holes and runner grooves of the pole frame, including an insulating sleeve and an insulating plate, to form a connecting flow channel to reduce the contact between the electrolyte and the metal frame and reduce the risk of leakage current.
It effectively reduces the contact area between the electrolyte and the frame, reduces the risk of leakage current, improves the electrolytic efficiency and energy utilization, and reduces the energy consumption of the electrolytic cell.
Smart Images
Figure CN223163502U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrolysis technology, and particularly to a bipolar frame, a bipolar plate and an electrolytic cell. Background Art
[0002] An electrolytic cell generally consists of several electrolysis compartments, and each electrolysis compartment is composed of components such as bipolar plates, electrodes and diaphragms. Among them, the bipolar plate includes a bipolar frame and a main bipolar plate disposed within the bipolar frame, and a flow channel structure for the passage of electrolyte or gas is provided on the bipolar frame. The bipolar frame is generally made of a metal material. During electrolysis operation, part of the current will flow out through the electrolyte at the flow channel structure of the bipolar frame, resulting in the phenomenon of leakage current. Summary of the Utility Model
[0003] The main object of this application is to propose a bipolar frame, a bipolar plate and an electrolytic cell, aiming to reduce the risk of leakage current on the bipolar frame.
[0004] To achieve the above object, the bipolar frame proposed in this application includes a frame body and an insulating assembly. The frame body has a flow channel groove and a flow channel hole, and the flow channel groove is communicated with the flow channel hole; the insulating assembly includes an insulating sleeve and an insulating plate. The insulating sleeve is embedded in the flow channel hole and has a communication port communicating with the flow channel hole; the insulating plate is installed at the flow channel groove and jointly forms a communication flow channel with the bottom wall of the flow channel groove, and the communication flow channel communicates with the communication port.
[0005] In one embodiment, a groove is formed on one side of the insulating plate facing the bottom wall of the flow channel groove, and the communication flow channel is formed between the bottom wall of the groove and the bottom wall of the flow channel groove.
[0006] In one embodiment, an insulating layer is provided on the bottom wall of the flow channel groove, and the communication flow channel is jointly formed between the insulating layer and the bottom wall of the groove.
[0007] In one embodiment, the insulating sleeve is fixedly connected to the insulating plate.
[0008] In one embodiment, the insulating sleeve and the insulating plate are of an integral structure.
[0009] In one embodiment, the flow channel hole includes a liquid inlet hole and a gas outlet hole, the flow channel groove includes a liquid inlet flow channel and a gas outlet flow channel, the liquid inlet hole is communicated with the liquid inlet flow channel, and the gas outlet hole is communicated with the gas outlet flow channel; the insulating sleeve is provided at both the liquid inlet hole and the gas outlet hole, and the insulating plate is installed at both the liquid inlet flow channel and the gas outlet flow channel.
[0010] In one embodiment, the insulating sleeve installed at the air outlet is defined as the first insulating sleeve, and a first communication port communicating with the air outlet is formed on the first insulating sleeve; the direction perpendicular to the bottom wall of the air flow channel and the extending direction of the flow channel groove is defined as the width direction, and the size of the first communication port in the width direction is W1, where 5 mm ≤ W1 ≤ 10 mm.
[0011] In one embodiment, the insulating sleeve installed at the liquid inlet hole is defined as the second insulating sleeve, and a second communication port communicating with the liquid inlet hole is formed on the second insulating sleeve; the direction perpendicular to the bottom wall of the liquid inlet flow channel and the extending direction of the flow channel groove is defined as the width direction, and the size of the second communication port in the width direction is W2, where 3 mm ≤ W2 ≤ 10 mm.
[0012] The present application also provides a pole plate, including the above-mentioned pole frame.
[0013] The present application also provides an electrolytic cell, including the above-mentioned pole plate.
[0014] The technical solution of the present application is that the insulating sleeve of the insulating component is embedded in the flow channel hole of the frame body, and the insulating plate of the insulating component is installed at the flow channel groove of the frame body. The insulating plate of the insulating component and the bottom wall of the flow channel groove together form a communication flow channel. The communication flow channel communicates with the communication port of the insulating sleeve, and the communication port of the insulating sleeve also communicates with the flow channel hole of the frame body. On the one hand, it can ensure that the electrolyzed products can still flow out of the flow channel hole smoothly; on the other hand, it can reduce the contact area between the electrolyte and the frame body, thereby reducing the risk of leakage current from the flow channel hole of the frame body. Description of the Drawings
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0016] Figure 1 It is a perspective structure schematic diagram of a perspective of an embodiment of the pole frame provided by the present application;
[0017] Figure 2 It is Figure 1 The partial enlarged view at A in
[0018] Figure 3 It is Figure 1 The partial enlarged view at B in
[0019] Figure 4 It is the front view of an embodiment of the pole frame provided by the present application;
[0020] Figure 5 is Figure 4 a cross-sectional view of C-C in;
[0021] Figure 6 a schematic structural diagram of an embodiment of the middle frame of the pole frame provided by the present application;
[0022] Figure 7 a schematic structural diagram of an embodiment of the insulation component in the pole frame provided by the present application;
[0023] Figure 8 a schematic structural diagram of another embodiment of the insulation component in the pole frame provided by the present application.
[0024] Description of the reference numerals in the drawings:
[0025] 100, frame; 110, flow channel groove; 111, liquid inlet flow channel; 112, gas outlet flow channel; 120, flow channel hole; 121, liquid inlet hole; 122, gas outlet hole;
[0026] 200, insulation component; 210, insulation sleeve; 210a, communication port; 211, first insulation sleeve; 211a, first communication port; 212, second insulation sleeve; 212a, second communication port; 220, insulation board; 221, groove.
[0027] The realization of the purpose, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments
[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.
[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0030] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.
[0031] An electrolytic cell generally consists of a number of electrolytic compartments, and each electrolytic compartment is composed of components such as electrode plates, electrodes, and diaphragms. Among them, the electrode plate includes an electrode frame and a main electrode plate disposed within the electrode frame, and a flow channel structure for the passage of electrolyte or gas is provided on the electrode frame. Generally, the electrode frame is made of a metal material. During the electrolysis operation, part of the current will flow out through the electrolyte at the flow channel structure of the electrode frame, resulting in a leakage current phenomenon, which leads to low current efficiency. And the low current efficiency will cause high energy consumption of the electrolytic cell and increase the hydrogen production cost.
[0032] In order to improve the risk of leakage current on the electrode frame, the present application proposes an electrode frame.
[0033] Please refer to Figures 1 to 8 , in an embodiment of the present application, the electrode frame includes a frame body 100 and an insulating component 200. The frame body 100 has a flow channel groove 110 and a flow channel hole 120, and the flow channel groove 110 and the flow channel hole 120 are connected; the insulating component 200 includes an insulating sleeve 210 and an insulating plate 220. The insulating sleeve 210 is embedded in the flow channel hole 120 and has a communication port 210a communicating with the flow channel hole; the insulating plate 220 is installed at the flow channel groove 110 and jointly forms a communication flow channel with the bottom wall of the flow channel groove 110, and the communication flow channel communicates with the communication port 210a.
[0034] The frame 100 refers to the component that mainly supports the bipolar plate. To ensure the high supporting strength and stability of the frame 100, the frame 100 can be made of metal. The frame 100 can be an annular frame 100 or a rectangular frame 100, etc. The frame 100 can be an integral structure, or the frame 100 is formed by connecting multiple connecting segments end to end. An installation hole is formed in the middle of the frame 100, and the main bipolar plate is installed in the installation hole. During the electrolysis reaction, the electrolyte enters and the gas discharges through the frame 100, so flow channel holes 120 can be provided on the frame 100. To facilitate the transitional flow of the electrolyte between the main bipolar plate and the cell frame, flow channels 110 communicating with the flow channel holes 120 are also provided on the cell frame. When the main bipolar plate is a bipolar plate, flow channels 110 can be provided on both opposite sides of the frame 100.
[0035] It can be understood that during the electrolysis process of the electrolyte, after the cell frame is charged, part of the current will flow out through the flow channels 110 and flow channel holes 120 of the cell frame, which will reduce the effective current for the electrolysis reaction, thereby affecting the energy utilization rate and electrolysis efficiency, resulting in a relatively high energy consumption of the electrolyzer and increasing the cost of hydrogen production. In the technical solution of this application, by setting the insulating component 200, and the insulating sleeve 210 of the insulating component 200 is embedded in the flow channel hole 120, and the insulating plate 220 of the insulating component 200 is installed at the flow channel 110, the electrolyte can be isolated from the metal frame 100 as much as possible, thereby reducing the risk of leakage current caused by the charging of the frame 100. In addition, by providing a communication port 210a communicating with the flow channel hole 120 on the insulating sleeve 210, and the insulating plate 220 and the bottom wall of the flow channel 110 jointly form a communication flow channel, and the communication flow channel communicates with the communication port 210a, the electrolyte can flow from the communication flow channel formed by the insulating plate 220 and the bottom wall of the flow channel 110 to the communication port 210a, thereby reducing the risk of contact between the electrolyte and the metal frame 100 and ensuring that the electrolyzed product flows out from the communication port 210a. In addition, by jointly forming a communication flow channel by the insulating plate 220 and the bottom wall of the flow channel 110, the insulating plate 220 plays the role of an insulating cover plate, reducing the risk of the electrolyte overflowing from the flow channel 110.
[0036] Specifically, the shape of the flow channel hole 120 can be circular, rectangular, oval, etc., and the shape of the insulating sleeve 210 can be adapted to the shape and size of the flow channel hole 120, so as to reduce the risk of leaving a gap between the insulating sleeve 210 and the hole wall of the flow channel hole 120, and further reduce the risk of the electrolyte contacting the frame 100. When the insulating sleeve 210 is embedded in the flow channel hole 120, an interference fit method can be adopted, or the insulating sleeve 210 and the inner wall of the flow channel hole 120 can be bonded by an adhesive. It should be noted that when the insulating sleeve 210 and the inner wall of the flow channel hole 120 are bonded by an adhesive, an adhesive with high temperature resistance and alkali resistance can be selected for bonding. Or a tackifier can be mixed in the insulating component 200, and when the insulating component 200 is heat vulcanized and formed, it can produce a firm bonding effect with the metal frame 100. The shape of the flow channel groove 110 can be strip-shaped, square or other shapes, etc., and the shape of the insulating plate 220 can be adapted to the shape of the flow channel groove 110, so as to reduce the risk of the electrolyte overflowing and contacting the frame 100.
[0037] In the technical solution of the present application, the insulating sleeve 210 of the insulating component 200 is embedded in the flow channel hole 120 of the frame 100, and the insulating plate 220 of the insulating component 200 is installed at the flow channel groove 110 of the frame 100. The insulating plate 220 of the insulating component 200 and the bottom wall of the flow channel groove 110 together form a communication flow channel. The communication flow channel communicates with the communication port 210a of the insulating sleeve 210, and the communication port 210a of the insulating sleeve 210 also communicates with the flow channel hole 120 of the frame 100. On the one hand, it can ensure that the electrolyzed products can still flow out of the flow channel hole 120 smoothly; on the other hand, it can reduce the contact area between the electrolyte and the frame 100, and further reduce the risk of leakage current from the flow channel hole 120 of the frame 100.
[0038] Please refer to Figure 1 , Figure 2 and Figure 7 , in some embodiments of the present application, a groove 221 is formed on the side of the insulating plate 220 facing the bottom wall of the flow channel groove 110, and a communication flow channel is formed between the bottom wall of the groove 221 and the bottom wall of the flow channel groove 110.
[0039] By forming a groove 221 on the side of the insulating plate 220 facing the bottom wall of the flow channel groove 110, even when the insulating plate 220 is directly supported on the bottom wall of the flow channel groove 110, it can still be ensured that the bottom wall of the groove 221 does not fit with the bottom wall of the flow channel groove 110, that is, the gap between the bottom wall of the groove 221 and the bottom wall of the flow channel groove 110 forms the above-mentioned communication flow channel, so as to improve the installation stability of the insulating plate 220 on the premise of ensuring that the products can flow out of the communication flow channel.
[0040] Of course, in other examples, a groove 221 may not be provided on the side of the insulating plate 220 facing the bottom wall of the flow channel groove 110. A certain distance is provided between the side of the insulating plate 220 facing the flow channel groove 110 and the bottom wall of the flow channel groove 110, so as to ensure that the electrolysis products can flow out from the gap formed between the insulating plate 220 and the flow channel groove 110.
[0041] Alternatively, in another example, a groove 221 may not be provided on the side of the insulating plate 220 facing the bottom wall of the flow channel groove 110, and the insulating plate 220 is attached to the flow channel groove 110, so that the electrolysis products flow over the surface of the insulating plate 220 facing away from the bottom wall of the flow channel groove 110. Further, in order to further reduce the electrolyte in the electrolysis products from flowing outside the flow channel groove 110, an insulating cover may be provided on the side of the insulating plate 220 facing away from the bottom wall of the flow channel groove 110. A certain gap is formed between the insulating cover and the insulating plate 220 to allow the electrolysis products to flow out from the gap.
[0042] Based on the solution that a groove 221 is provided on the side of the insulating plate 220 facing the bottom wall of the flow channel groove 110, in some embodiments of the present application, further, an insulating layer is provided on the bottom wall of the flow channel groove 110, and a communication flow channel is jointly formed between the insulating layer and the bottom wall of the groove 221.
[0043] By providing an insulating layer on the bottom wall of the flow channel groove 110 and jointly forming a communication flow channel between the insulating layer and the bottom wall of the groove 221, the contact area between the electrolyte in the electrolysis products and the frame 100 can be further reduced, and further the risk of leakage current can be reduced.
[0044] Specifically, the insulating layer may be in the structure of a coating or a plate-like body structure, etc.
[0045] In some embodiments of the present application, the insulating sleeve 210 is fixedly connected to the insulating plate 220.
[0046] By fixedly connecting the insulating sleeve 210 to the insulating plate 220, the insulating sleeve 210 and the insulating plate 220 have the effect of mutually fixing and limiting, reducing the risk of the insulating plate 220 detaching from the flow channel groove 110, and at the same time reducing the risk of the insulating sleeve 210 detaching from the flow channel hole 120, so as to ensure that the insulating plate 220 and the insulating sleeve 210 are in a stable state, so as to further improve the good isolation effect between the electrolyte and the frame 100.
[0047] Specifically, when the insulating sleeve 210 is fixedly connected to the insulating plate 220, the insulating sleeve 210 and the insulating plate 220 can be connected by means of snap connection, bonding or plugging, etc.
[0048] In some embodiments of the present application, the insulating sleeve 210 and the insulating plate 220 are of an integral structure.
[0049] By adopting the structure in which the insulating sleeve 210 and the insulating plate 220 are integrated, on the one hand, the connection between the insulating sleeve 210 and the insulating plate 220 can be ensured to be more stable, and on the other hand, the insulating sleeve 210 and the insulating plate 220 can be installed on the frame 100 simultaneously, reducing the installation steps and improving the installation efficiency.
[0050] Please refer to Figures 1 to 8 , in some embodiments, the flow channel hole 120 includes a liquid inlet hole 121 and a gas outlet hole 122, the flow channel groove 110 includes a liquid inlet flow channel 111 and a gas outlet flow channel 112, the liquid inlet hole 121 is communicated with the liquid inlet flow channel 111, and the gas outlet hole 122 is communicated with the gas outlet flow channel 112; insulating sleeves 210 are provided at both the liquid inlet hole 121 and the gas outlet hole 122, and insulating plates 220 are installed in both the liquid inlet flow channel 111 and the gas outlet flow channel 112.
[0051] The flow channel hole 120 includes a liquid inlet hole 121 for supplying electrolyte to flow into the electrolytic cell of the electrolytic cell from the outside. The flow channel hole 120 further includes a gas outlet hole 122 for discharging the electrolyzed products. By providing the liquid inlet hole 121 and the gas outlet hole 122 on the bipolar plate frame, it is convenient for the electrolyte to flow into the electrolytic cell and for the electrolyzed products to flow out of the electrolytic cell. By including the liquid inlet flow channel 111 in the flow channel groove 110 and the liquid inlet flow channel 111 being communicated with the liquid inlet hole 121, it is convenient for the electrolyte to enter along the liquid inlet flow channel 111 into the electrolytic cell after entering from the liquid inlet hole 121, thus playing a good guiding effect on the flow of the electrolyte. By communicating the gas outlet flow channel 112 of the flow channel groove 110 with the gas outlet hole 122, it is convenient for the electrolytic products to flow into the gas outlet hole 122 along the gas outlet flow channel 112, thus playing a good guiding effect on the discharge of the electrolytic products.
[0052] By providing the insulating sleeve 210 at the liquid inlet hole 121 and installing the insulating plate 220 in the liquid inlet flow channel 111, the risk of the electrolyte contacting the liquid inlet hole 121 of the frame 100 can be reduced, and further the risk of current leakage from the liquid inlet hole 121 can be reduced. Similarly, by providing the insulating sleeve 210 at the gas outlet hole 122 and installing the insulating plate 220 in the gas outlet flow channel 112, the risk of the electrolyte contacting the gas outlet hole 122 of the frame 100 can be reduced, and further the risk of current leakage from the gas outlet hole 122 can be reduced.
[0053] As Figure 7 shown, in some embodiments of the present application, the insulating sleeve 210 installed at the gas outlet hole 122 is defined as the first insulating sleeve 211, and a first communication port 211a communicated with the gas outlet hole 122 is provided on the first insulating sleeve 211; defining the direction perpendicular to the bottom wall of the gas outlet flow channel 112 and the extending direction of the flow channel groove 110 as the width direction, the dimension of the first communication port 211a in the width direction is W1, and 5mm ≤ W1 ≤ 10mm.
[0054] By setting the dimension W1 in the width direction of the first communication port 211a to 5 mm ≤ W1 ≤ 10 mm, on the one hand, it is convenient for the electrolysis products to be discharged smoothly, and on the other hand, the current leakage at the air outlet 122 is reduced.
[0055] As Figure 8 shown, in some embodiments of the present application, the insulating sleeve 210 installed on the liquid inlet hole 121 is defined as the second insulating sleeve 212, and a second communication port 212a communicating with the liquid inlet hole 121 is formed on the second insulating sleeve 212; the direction perpendicular to the bottom wall of the liquid inlet flow channel 111 and the extending direction of the flow channel groove 110 is defined as the width direction, and the dimension in the width direction of the second communication port 212a is W2, 3 mm ≤ W2 ≤ 10 mm.
[0056] By setting the dimension W2 in the width direction of the second communication port 212a to 3 mm ≤ W2 ≤ 10 mm, on the one hand, it is convenient for the electrolyte to enter the electrolysis chamber, and on the other hand, the current leakage at the liquid inlet hole 121 is reduced.
[0057] The present application also provides a plate electrode, which includes a frame. The specific structure of the frame refers to the above embodiments. Since this plate electrode adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.
[0058] The present application also provides an electrolytic cell, which includes a plate electrode. The specific structure of the plate electrode refers to the above embodiments. Since this electrolytic cell adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.
[0059] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present application.
Claims
1. A pole frame, characterized in that, Comprising: A housing having a flow channel groove and a flow channel hole, the flow channel groove and the flow channel hole being in communication; And An insulating assembly including an insulating sleeve and an insulating plate. The insulating sleeve is embedded in the flow channel hole and has a communication port communicating with the flow channel hole; the insulating plate is installed at the flow channel groove and together with the bottom wall of the flow channel groove forms a communicating flow channel, and the communicating flow channel communicates with the communication port.
2. The pole frame according to claim 1, characterized in that, A groove is formed on one side of the insulating plate facing the bottom wall of the flow channel groove, and the communicating flow channel is formed between the bottom wall of the groove and the bottom wall of the flow channel groove.
3. The pole frame according to claim 2, wherein An insulating layer is provided on the bottom wall of the flow channel groove, and the communicating flow channel is formed together between the insulating layer and the bottom wall of the groove.
4. The pole frame according to claim 1, wherein, The insulating sleeve is fixedly connected to the insulating plate.
5. The pole frame according to claim 4, wherein The insulating sleeve and the insulating plate are of an integral structure.
6. The pole frame according to any one of claims 1 to 5, characterized in that, The flow channel hole includes a liquid inlet hole and a gas outlet hole, the flow channel groove includes a liquid inlet flow channel and a gas outlet flow channel, the liquid inlet hole communicates with the liquid inlet flow channel, and the gas outlet hole communicates with the gas outlet flow channel; the insulating sleeve is provided at both the liquid inlet hole and the gas outlet hole, and the insulating plate is installed at both the liquid inlet flow channel and the gas outlet flow channel.
7. The pole frame according to claim 6, wherein The insulating sleeve installed at the gas outlet hole is defined as a first insulating sleeve, and a first communication port communicating with the gas outlet hole is formed on the first insulating sleeve; defining the direction perpendicular to the bottom wall of the gas outlet flow channel and the extending direction of the flow channel groove as the width direction, the dimension of the first communication port in the width direction is W1, and 5 mm ≤ W1 ≤ 10 mm.
8. The pole frame according to claim 6, characterized in that, The insulating sleeve installed at the liquid inlet hole is defined as a second insulating sleeve, and a second communication port communicating with the liquid inlet hole is formed on the second insulating sleeve; defining the direction perpendicular to the bottom wall of the liquid inlet flow channel and the extending direction of the flow channel groove as the width direction, the dimension of the second communication port in the width direction is W2, and 3 mm ≤ W2 ≤ 10 mm.
9. A plate electrode, characterized in that, Including the pole frame according to any one of claims 1 to 8.
10. An electrolytic cell, characterized in that, Including the electrode plate according to claim 9.