Electrolytic bath
By setting liquid-blocking structures on the outer periphery of the electrode frame and insulating plate of the electrolytic cell, the problem of short circuits and sparks caused by electrolyte leakage or condensation is solved, thus improving the safety and stability of the electrolytic cell.
Patent Information
- Application Number
- CN202520029213.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-06
AI Technical Summary
During long-term operation, existing electrolytic cells may experience short circuits and sparks due to electrolyte leakage or condensation, posing a safety hazard for which there is a lack of effective solutions.
Liquid-blocking structures, including grooves or protrusions, are provided on the outer periphery of the electrode frame and insulating plate of the electrolytic cell to prevent leakage and spread of electrolyte or condensate, thus avoiding short circuits and sparks.
It effectively blocks electrolyte or condensate, preventing short circuits and sparks in the electrolytic cell, thus improving the safety and stability of the electrolytic cell during use.
Smart Images
Figure CN223766448U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of water electrolysis for hydrogen production technology, and in particular relates to an electrolyzer. Background Technology
[0002] Hydrogen production by water electrolysis is currently the mainstream technology in the market, and the electrolyzer is the core component of the water electrolysis hydrogen production system. The electrolyzer consists of several electrode frames, electrode plates, insulating gaskets, and end pressure plates, and the individual chambers of the electrolyzer are sealed by adjacent electrode frames and the insulating gaskets between them.
[0003] When an electrolytic cell deforms during long-term operation or is not installed horizontally, electrolyte leakage may occur in the chamber, or condensation may accumulate on the surface of the electrolytic cell. The electrolyte or condensation will flow down the outer periphery of the electrode frame, conduction to adjacent electrode frames or between the electrode frame and the end plate, which may cause short circuits and sparks in the electrolytic cell, corrode the electrolytic cell body, or even cause electrolyte splashing, leading to safety accidents.
[0004] Currently, there is no solution for short circuits and sparks in electrolytic cells caused by electrolyte leakage or condensation. Utility Model Content
[0005] This application provides an electrolytic cell to solve the technical problem of short circuit and sparking caused by electrolyte leakage or condensation in existing electrolytic cells.
[0006] This application provides an electrolytic cell comprising at least two electrode frames stacked along the axial direction of the electrolytic cell to form an electrode frame stack; two end plates respectively disposed at both ends of the electrode frame stack along the axial direction of the electrolytic cell; and an insulating plate disposed between any of the end plates and an adjacent electrode frame, wherein at least one of the electrode frames and the insulating plate has a liquid-blocking structure on its outer peripheral surface.
[0007] In an optional embodiment of this application, along the axial direction of the electrolytic cell, at least one of the outermost electrode frames in the electrode frame stack is a positive electrode frame, which is used to connect to the positive terminal of the power supply. The insulating plate is disposed between the positive electrode frame and the adjacent end pressure plate. The positive electrode frame and / or the insulating plate are provided with the liquid-blocking structure.
[0008] In an optional embodiment of this application, the positive electrode frame is provided with the liquid-blocking structure, and the electrolytic cell further includes a junction plate disposed on the outer peripheral surface of the positive electrode frame. The liquid-blocking structure is disposed on the non-connected portion between the outer peripheral surface of the positive electrode frame and the junction plate.
[0009] In an optional embodiment of this application, the liquid-blocking structure and the electrode plate are spaced apart on the outer peripheral surface of the positive electrode frame along the axial direction of the electrolytic cell, and the liquid-blocking structure is located on the side of the electrode plate away from the insulating plate.
[0010] In an optional embodiment of this application, at least a portion of the liquid-resistant structure and the electrode plate are located on the same circumferential cross-section of the positive terminal frame.
[0011] In an optional embodiment of this application, the insulating plate is provided with the liquid-blocking structure. The insulating plate includes a main body and an extension protruding from the end of the main body. The main body is sandwiched between the positive end electrode frame and the end pressure plate. The extension is exposed outside the positive end electrode plate, and the liquid-blocking structure is disposed on the extension.
[0012] In an optional embodiment of this application, along the axial direction of the electrolytic cell, the pole frame located between the two outermost pole frames in the pole frame stack is an intermediate pole frame. At least one of the intermediate pole frames is provided with the liquid-blocking structure.
[0013] In an optional embodiment of this application, the liquid-blocking structure is a groove formed by recessing inward from the outer peripheral surface or a protrusion protruding from the outer peripheral surface.
[0014] In an optional embodiment of this application, the protrusion is an elastic element and is detachably disposed on the outer peripheral surface.
[0015] In an optional embodiment of this application, the width of the groove along the axial direction H of the electrolytic cell is 4mm to 18mm, and the depth of the groove is 3mm to 15mm.
[0016] In an optional embodiment of this application, the protrusion height of the protrusion is 3mm to 15mm.
[0017] In summary, the electrolytic cell provided in this application has at least the following beneficial effects:
[0018] In this application, since at least one of the electrode frame and the insulating plate is provided with a liquid-blocking structure on its outer peripheral surface, when electrolyte leakage or condensation occurs in the small chamber near the liquid-blocking structure, the liquid-blocking structure can block and intercept the electrolyte or condensation to prevent the electrolyte or condensation from conducting to adjacent electrode frames or between the electrode frame and the end plate. This can prevent short circuits and sparks caused by current in the electrolytic cell and thus improve the safety of the electrolytic cell during use. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application; those skilled in the art can obtain other drawings based on these drawings without any creative effort.
[0020] Figure 1 This is a schematic diagram of the overall structure of the first type of electrolytic cell provided in the embodiments of this application;
[0021] Figure 2 A partial structural schematic diagram of the first type of electrolytic cell provided in an embodiment of this application;
[0022] Figure 3 A partial structural schematic diagram of the second type of electrolytic cell provided in an embodiment of this application;
[0023] Figure 4 A partial structural schematic diagram of the third type of electrolytic cell provided in an embodiment of this application;
[0024] Figure 5 A partial structural schematic diagram of the fourth type of electrolytic cell provided in the embodiments of this application;
[0025] Figure 6 A partial structural schematic diagram of the fifth type of electrolytic cell provided in the embodiments of this application;
[0026] Figure 7 A schematic diagram showing the connection between the positive terminal frame and the terminal plate of the electrolytic cell provided in an embodiment of this application;
[0027] Figure 8 A schematic diagram showing the positional relationship between the liquid-blocking structure and the electrode plate of the electrolytic cell provided in an embodiment of this application;
[0028] Figure 9 This is a schematic diagram showing another positional relationship between the liquid-blocking structure and the electrode plate of the electrolytic cell provided in an embodiment of this application.
[0029] The attached figures are labeled as follows:
[0030] 10. Pole frame; 101. Positive end pole frame; 102. Middle pole frame; 103. Negative end pole frame;
[0031] 20. Insulating plate; 21. Main body; 22. Extension;
[0032] 30. End pressure plate; 301. Positive end pressure plate; 302. Negative end pressure plate;
[0033] 40. Terminal block;
[0034] A. Liquid-blocking structure; H. Axial direction of the electrolytic cell; Detailed Implementation
[0035] To make the above and other features and advantages of this application clearer, the present invention will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art and are exemplary only, not restrictive.
[0036] Furthermore, features specified with "first" or "second" for descriptive purposes only should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features specified with "first" or "second" may explicitly or implicitly include at least one of the specified features. The description of "multiple" generally means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0037] The electrolyzer in this application can be an alkaline water electrolyzer (ALK), a proton exchange membrane electrolyzer (PEM), or a solid polymer anion exchange membrane electrolyzer (AEM). In this embodiment, an alkaline water electrolyzer (ALK) is used as an example for illustration.
[0038] Figure 1 This is a schematic diagram of the overall structure of the first type of electrolytic cell provided in the embodiments of this application. Figure 2 This is a partial structural diagram of the first type of electrolytic cell provided in the embodiments of this application, specifically... Figure 1 A magnified view of point X in the middle. Figure 3-6 These are partial structural schematic diagrams of the second, third, fourth, and fifth electrolytic cells provided in the embodiments of this application. The other overall structures are the same as those shown. Figure 1 It is the same as the first type of electrolytic cell shown.
[0039] Please see Figures 1 to 6 The electrolytic cell of this application embodiment includes at least two electrode frames 10, which are stacked along the axial direction H of the electrolytic cell to form an electrode frame stack.
[0040] Two end pressure plates 30 are respectively disposed at both ends of the electrode frame laminate along the axial direction H of the electrolytic cell;
[0041] An insulating plate 20 is disposed between any of the end pressure plates 30 and the adjacent pole frame 10, and a liquid-blocking structure A is provided on the outer peripheral surface of at least one of the pole frame 10 and the insulating plate 20.
[0042] Specifically, each electrode frame 10 is connected to a corresponding electrode plate, and multiple electrode plates are stacked and arranged to form a small chamber of an electrolytic cell between adjacent electrode plates. The electrode frame 10 may have a central through hole and a flow channel hole. The central through hole is used to accommodate the corresponding electrode plate so that the electrode frame 10 is arranged around the outside of the corresponding electrode plate, while the flow channel hole is used to deliver electrolyte to its corresponding electrolytic cell.
[0043] Understandably, each electrode frame 10 can be integrally formed with the corresponding electrode plate, or it can be separately formed with the corresponding electrode plate and then connected (e.g., welded) together; this application does not impose any specific limitations. The thickness direction of the electrode frame 10 is the axial direction H of the electrolytic cell.
[0044] Along the axial direction H of the electrolytic cell, end pressure plates 30 are disposed at both ends of the multiple pole frames 10 as a whole. The two end pressure plates 30 are used to provide clamping force for the multiple pole frames 10 so as to clamp the multiple pole frames 10 after the electrolytic cell is assembled.
[0045] An insulating plate 20 is disposed between the end pressure plate 30 and the adjacent pole frame 10 for electrically insulating the end pressure plate 30 and the adjacent pole frame 10. Specifically, depending on the different structures of the electrolytic cell, the insulating plate 20 can be disposed between one of the end pressure plates 30 (i.e., the positive end pressure plate or the negative end pressure plate) and the corresponding pole frame 10, or one insulating plate 20 can be disposed between both end pressure plates 30 and the corresponding pole frame 10. This application does not make specific limitations. This embodiment is described by taking the example of disposing of only one insulating plate 20 between the positive end pressure plate and the positive pole frame.
[0046] In this application, at least one of the electrode frame 10 and the insulating plate 20 has a liquid-blocking structure A on its outer peripheral surface. That is, in this application, at least one electrode frame 10 has a liquid-blocking structure A (such as...) on its outer peripheral surface. Figure 1 , Figure 2 , Figure 3 and Figure 4 (as shown); or, a liquid-blocking structure A (such as...) is provided on the outer peripheral surface of the insulating plate 20. Figure 5 and Figure 6 (as shown); or, a liquid-blocking structure A is provided on the outer peripheral surface of the insulating plate 20 and a liquid-blocking structure A is also provided on the outer peripheral surface of at least one pole frame 10.
[0047] Therefore, in this embodiment, since at least one of the electrode frame 10 and the insulating plate 20 is provided with a liquid-blocking structure A, when electrolyte leakage or condensation occurs in the small chamber near the liquid-blocking structure A, the liquid-blocking structure can block and intercept the electrolyte or condensation to prevent the electrolyte or condensation from conducting to adjacent electrode frames or between the electrode frame and the end plate. This can prevent the electrolytic cell from short-circuiting and sparking under the action of current, thereby improving the safety of the electrolytic cell during use.
[0048] Please see Figure 1 , Figure 5 and Figure 6 The liquid-blocking structure A can be a groove formed by an inward indentation from its corresponding outer peripheral surface. The groove-shaped liquid-blocking structure A can collect and gather leaked electrolyte or condensate immediately, preventing the electrolyte or condensate from spreading further to adjacent electrode frames or end plates, thereby avoiding safety accidents caused by short circuits and sparks in the electrolytic cell.
[0049] Specifically, the width of the groove-shaped liquid-blocking structure A along the axial direction H of the electrolytic cell is 4mm to 18mm, and the depth of the recess is 3mm to 15mm. For example, the width of the groove-shaped liquid-blocking structure A along the axial direction H of the electrolytic cell can be 4mm, 6mm, 7mm, 9mm, 10mm, 11mm, 12mm, 15mm, 16mm, 18mm, etc., and the depth of the recess can be 3mm, 5mm, 6mm, 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, etc.
[0050] Here, by setting the width and depth of the groove-shaped liquid-blocking structure A within the aforementioned range, the liquid-blocking effect can be avoided if the groove is too small, resulting in an insignificant effect, or if the groove is too large, leading to a decrease in the strength of the electrode frame 10 and / or the insulating plate 20 and an increase in processing costs. This is because if the groove is too small, it can collect and gather less leaked electrolyte or condensate, resulting in an insignificant liquid-blocking effect. If the groove is too large, it will reduce the wall thickness of the electrode frame 10 and / or the insulating plate 20, thereby affecting the strength of the electrode frame 10 and / or the insulating plate 20. Alternatively, it may require additional thickening of the electrode frame 10 and / or the insulating plate 20 to create the groove, which will inevitably increase costs.
[0051] Please see Figure 3 and Figure 4 The liquid-blocking structure A can also be a protrusion extending beyond its corresponding outer peripheral surface. The protruding liquid-blocking structure A can be integrally formed with its corresponding outer peripheral surface (e.g., Figure 3 As shown), it can also be detachably disposed from the outer peripheral surface (e.g. Figure 4As shown, the material of the protrusion can be the same as or different from that of the electrode frame. In some embodiments, the protrusion is integrally formed with the outer peripheral surface, for example, by machining the outer peripheral surface of the electrode frame or by welding a metal strip to the outer peripheral surface of the electrode frame. Preferably, in other embodiments, the protrusion is detachably disposed on the outer peripheral surface, which reduces processing difficulty and cost compared to an integrally disposed protrusion. In some embodiments, the protrusion can be a rigid component and detachably disposed on the outer peripheral surface, for example, by using a detachable metal ring fitted onto the outer peripheral surface of the positive electrode frame to form the protrusion. In this case, the inner diameter of the metal ring must precisely match the outer diameter of the positive electrode frame, and the deformation must be minimal during long-term operation of the electrolytic cell. More preferably, the protrusion is an elastic component and detachably disposed on the outer peripheral surface, for example, by using elastic materials such as rubber or plastic to cover the outer peripheral surface of the positive electrode frame to form the protrusion. Compared to a rigid material protrusion, this facilitates installation and disassembly and reduces subsequent maintenance work.
[0052] Among them, the protruding liquid-blocking structure A can block the leakage of electrolyte or condensate in the first instance, which increases the difficulty of electrolyte or condensate spreading to other areas and can also avoid safety accidents caused by electrolyte or condensate spreading to other uncontrollable areas.
[0053] Specifically, the protrusion height of the protruding liquid-blocking structure A is 3mm to 15mm. For example, the protrusion height of the protruding liquid-blocking structure A can be 3mm, 5mm, 6mm, 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, etc.
[0054] Here, by setting the protrusion height of the protruding liquid-blocking structure A within the above-mentioned range, the liquid-blocking effect can be avoided if the protrusion is too small, and the cost can be increased if the protrusion is too large.
[0055] In some embodiments, along the axial direction H of the electrolytic cell, at least one outermost pole frame 10 in the pole frame stack is a positive pole frame 101, which is used to connect to the positive terminal of the power supply. An insulating plate 20 is disposed between the positive pole frame 101 and the adjacent end pressure plate 30. The positive pole frame 101 and / or the insulating plate 20 are provided with a liquid-blocking structure A.
[0056] Understandably, in some embodiments, along the axial direction H of the electrolytic cell, the outermost pole frame 10 in the pole frame stack is the positive pole frame 101, which is used to connect to the positive terminal of the power supply; the other outermost pole frame 10 in the pole frame stack is the negative pole frame 103, which is used to connect to the negative terminal of the power supply; and all pole frames 10 located between the negative pole frame 103 and the positive pole frame 101 are intermediate pole frames 102. Accordingly, the end pressure plate 30 disposed near the positive pole frame 101 is the positive end pressure plate 301, and the end pressure plate 30 disposed near the negative pole frame 103 is the negative end pressure plate 302. In addition, in some other embodiments, along the axial direction H of the electrolytic cell, the two outermost pole frames in the pole frame stack are both positive pole frames, which are used to connect to the positive terminal of the power supply. At this time, the negative pole frame is located in the middle of the electrolytic cell and is used to connect to the negative terminal of the power supply. All pole frames between the positive and negative pole frames are intermediate pole frames.
[0057] In some embodiments, the insulating plate 20 is disposed between the positive terminal frame 101 and the adjacent end plate 30 (i.e., the positive end plate 301), and the positive terminal frame 101 and / or the insulating plate 20 are provided with a liquid-blocking structure A. That is, in this embodiment, the positive terminal frame 101 is provided with a liquid-blocking structure A; or, the insulating plate 20 is provided with a liquid-blocking structure A; or, both the positive terminal frame 101 and the insulating plate 20 are provided with a liquid-blocking structure A.
[0058] In this embodiment, the insulating plate 20 is disposed between the positive electrode frame 101 and the adjacent end plate 30 (i.e., the positive end plate 301) to provide insulation between the positive electrode frame 101 and the positive end plate 301. If leakage occurs in the chambers near the positive electrode frame 101 or condensation occurs on the surface of the electrolytic cell, the liquid-blocking structure A on the positive electrode frame 101 and / or the insulating plate 20 can immediately block the electrolyte or condensation leaking from the nearby chambers. This prevents the electrolyte or condensation from spreading to the positive end plate 301 through the surface of the positive electrode frame 101 and / or the insulating plate 20, thereby avoiding insulation failure caused by the conduction between the positive electrode frame 101 and the positive end plate 301 and potential safety accidents, thus improving the safety of the electrolytic cell during use.
[0059] In one specific embodiment, please refer to Figure 1-2 The positive terminal frame 101 is provided with a liquid-blocking structure A, which is a groove formed by recessing from the outer periphery of the positive terminal frame 101 inward.
[0060] In one specific embodiment, please refer to Figure 3 and Figure 4The positive terminal frame 101 is provided with a liquid-blocking structure A, which is a protrusion extending beyond the outer peripheral surface of the positive terminal frame 101. Specifically, the liquid-blocking structure A (i.e., the protrusion) can be integrally formed with the outer peripheral surface of the positive terminal frame 101 (e.g., Figure 3 As shown), it can also be detachably disposed from the outer peripheral surface of the positive terminal frame 101 (e.g. Figure 4 (As shown).
[0061] In one specific embodiment, please refer to Figure 5 The insulating plate 20 is provided with a liquid-blocking structure A. The insulating plate 20 is a flat plate structure. Specifically, in this embodiment, the liquid-blocking structure A can be a groove formed inward from the outer peripheral surface of the insulating plate 20, or a protrusion extending beyond the outer peripheral surface of the insulating plate 20.
[0062] It should be noted that when the insulating plate 20 has a flat plate structure, the distance between the liquid-blocking structure A and the end plate 30 is not less than the insulation thickness between the positive terminal frame 101 and the end plate 30 (i.e., the positive end plate 301). "The distance between the liquid-blocking structure A and the end plate 30" refers to the distance between the edge of the liquid-blocking structure A closest to the end plate 30 and the end plate 30. To ensure that the insulating plate 20 can provide insulation between the positive terminal frame 101 and the positive end plate 301, there are certain requirements for the thickness of the insulating plate 20. Specifically, the thickness of the insulating plate 20 must meet at least the insulation thickness requirement, where "insulation thickness" refers to the minimum thickness of the insulating plate required to meet the insulation requirements between the positive terminal frame 101 and the positive end plate 301.
[0063] Therefore, in this embodiment, since the insulating plate 20 is a flat plate structure and a liquid-blocking structure A is provided on the insulating plate 20, while ensuring that the distance between the liquid-blocking structure A and the end pressure plate 30 is not less than the insulation thickness between the positive end frame 101 and the positive end pressure plate 301, the thickness portion of the insulating plate 20 between the liquid-blocking structure A and the end pressure plate 30 in this application can meet the insulation requirements. The portion of the insulating plate 20 with the liquid-blocking structure A can, on the one hand, enhance the electrical insulation performance between the positive end frame 101 and the positive end pressure plate 301, and on the other hand, this portion and the liquid-blocking structure A can immediately block the electrolyte or condensate leaking from the nearby chamber, so that the leaked electrolyte or condensate will not spread to the positive end pressure plate 301 through the surface of the insulating plate 20. This can avoid insulation failure caused by the positive end frame 101 and the positive end pressure plate 301 conducting and the possible safety accidents, thereby improving the safety during the use of the electrolytic cell.
[0064] In one specific embodiment, please refer to Figure 6The insulating plate 20 is provided with a liquid-blocking structure A. The insulating plate 20 includes a main body 21 and an extension 22 protruding from the end of the main body 21. The main body 21 is sandwiched between the positive end pole frame 101 and the end pressure plate 30. The extension 22 is exposed outside the positive end pole frame 101, and the liquid-blocking structure A is disposed on the extension 22. Specifically, in this embodiment, the liquid-blocking structure A can be a groove formed inward from the outer peripheral surface of the extension 22, or it can be a protrusion protruding from the outer peripheral surface of the extension 22.
[0065] In this embodiment, the main body 21 is the portion sandwiched between the positive end electrode frame 101 and the positive end pressure plate 301 along the axial direction H of the electrolytic cell, and the extension 22 is the portion protruding from the end of the main body 21. It is equivalent to locally thickening the main body 21 through the extension 22. Based on the main body 21 of the insulating plate 20, the insulating plate 20 can be guaranteed to meet the insulation requirements between the positive end electrode frame 101 and the positive end pressure plate 301. The liquid-blocking structure A provided on the extension 22 can block the electrolyte or condensate leaking from the nearby chamber in the first time. Therefore, this application can provide the liquid-blocking structure A while meeting the insulation requirements without increasing the overall thickness of the main body 21, thereby helping to reduce costs.
[0066] In one specific embodiment, at least one intermediate pole frame (the other pole frames 10 excluding the negative pole frame 103 and the positive pole frame 101) is provided with a liquid-blocking structure A.
[0067] In this embodiment, a liquid-blocking structure A is provided on at least one intermediate electrode frame, which can block and intercept the electrolyte or condensate leaking from the small chamber near the liquid-blocking structure A in the first instance, preventing the electrolyte or condensate from continuing to spread to the adjacent electrode frame, thereby preventing short circuit and sparking in the electrolytic cell and improving the safety of the electrolytic cell during use.
[0068] Figure 7 This is a schematic diagram showing the connection between the positive terminal frame and the junction plate of the electrolytic cell provided in an embodiment of this application. Figure 8 This is a schematic diagram showing the positional relationship between the liquid-blocking structure and the electrode plate of the electrolytic cell provided in an embodiment of this application. Figure 9 This is a schematic diagram showing another positional relationship between the liquid-blocking structure and the electrode plate of the electrolytic cell provided in an embodiment of this application.
[0069] Please see Figures 7 to 9 The positive electrode frame 101 is provided with a liquid-blocking structure A, and the electrolytic cell also includes a junction plate 40, which is disposed on the outer peripheral surface of the positive electrode frame 101. The liquid-blocking structure A is disposed on the non-connected portion of the outer peripheral surface of the positive electrode frame 101 and the junction plate 40.
[0070] In this embodiment, the positive terminal frame 101 is connected to the positive power supply via the junction plate 40. The liquid blocking structure A is disposed on the non-connected portion of the outer peripheral surface of the positive terminal frame 101 and the junction plate 40, so that the liquid blocking structure A is disposed away from the junction plate 40. Thus, when leakage or condensation occurs in the small chamber near the positive terminal frame 101, the liquid blocking structure A can immediately prevent the leaked electrolyte or condensate from flowing to the positive terminal pressure plate 301 and causing a safety accident.
[0071] Please see Figure 8 At least a portion of the liquid-blocking structure A and the junction plate 40 are located on the same circumferential cross-section of the positive terminal frame 101. That is, the liquid-blocking structure A and the junction plate 40 are spaced apart on the outer circumferential surface of the positive terminal frame 101. For example, there may be three junction plates 40, which are spaced apart on the outer circumferential surface of the positive terminal frame 101, and the liquid-blocking structure A is disposed on the outer circumferential surface of the positive terminal frame 101 in the area between every two adjacent junction plates 40.
[0072] In this embodiment, the liquid-blocking structure A and the junction plate 40 are spaced apart on the outer peripheral surface of the positive terminal frame 101. So when leakage or condensation occurs in the small chamber near the positive terminal frame 101, both the liquid-blocking structure A and the junction plate 40 can block the leaked electrolyte or condensation in their respective areas immediately. That is, the junction plate 40 itself can also act as a liquid-blocking structure, thereby preventing the leaked electrolyte or condensation from flowing to the positive terminal pressure plate 301 and causing safety accidents.
[0073] Please see Figure 9 Along the axial direction H of the electrolytic cell, the liquid-blocking structure A and the electrode plate 40 are spaced apart on the outer peripheral surface of the positive electrode frame 101, and the liquid-blocking structure A is located on the side of the electrode plate 40 away from the insulating plate 20. That is to say, along the axial direction H of the electrolytic cell, the liquid-blocking structure A is located on the portion of the positive electrode frame 101 between the electrode plate 40 and the insulating plate 20.
[0074] In this embodiment, along the axial direction H of the electrolytic cell, since the liquid blocking structure A is located on the side of the electrode plate 40 away from the insulating plate 20, that is, the liquid blocking structure A is set closer to the small chamber near the positive electrode frame 101, when leakage or condensation occurs in the small chamber near the positive electrode frame 101, the liquid blocking structure A can block the leaked electrolyte or condensation immediately, so that the electrolyte or condensation cannot reach the electrode plate 40, thereby avoiding safety accidents caused by the leaked electrolyte or condensation flowing to uncontrollable areas (such as the ground) through the electrode plate 40, power lines, etc.
[0075] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. An electrolytic cell characterized in that, The electrolytic cell comprises: at least two polar frames (10) arranged in a stack along the electrolytic cell axis (H) to form a polar frame stack; two end pressure plates (30) respectively arranged at the two ends of the polar frame stack along the electrolytic cell axis (H); an insulating plate (20) arranged between any one of the end pressure plates (30) and the polar frame (10) adjacent thereto, and a liquid blocking structure (A) is arranged on the outer circumferential surface of at least one of the polar frame (10) and the insulating plate (20).
2. The electrolytic cell according to claim 1, wherein: in the electrolytic cell axis (H), at least one of the polar frames (10) located at the outermost side in the polar frame stack is a positive end polar frame (101), the positive end polar frame (101) is used to be connected to the positive electrode of the power supply, and the insulating plate (20) is arranged between the positive end polar frame (101) and the end pressure plate (30) adjacent thereto; the positive end polar frame (101) and / or the insulating plate (20) is provided with the liquid blocking structure (A).
3. The electrolytic cell according to claim 2, wherein: the positive end polar frame (101) is provided with the liquid blocking structure (A), and the electrolytic cell further comprises an electricity receiving plate (40) arranged on the outer circumferential surface of the positive end polar frame (101); the liquid blocking structure (A) is arranged on the non-connected part of the outer circumferential surface of the positive end polar frame (101) and the electricity receiving plate (40).
4. The electrolytic cell according to claim 3, wherein: in the electrolytic cell axis (H), the liquid blocking structure (A) and the electricity receiving plate (40) are arranged at intervals on the outer circumferential surface of the positive end polar frame, and the liquid blocking structure (A) is located on the side of the electricity receiving plate (40) away from the insulating plate (20); or at least part of the liquid blocking structure (A) and the electricity receiving plate (40) are located on the same circumferential section of the positive end polar frame (101).
5. The electrolytic cell according to claim 2, wherein: the insulating plate (20) is provided with the liquid blocking structure (A); the insulating plate (20) comprises a main body part (21) and an extension part (22) protruding from the end of the main body part (21), the main body part (21) is clamped between the positive end polar frame (101) and the end pressure plate (30), the extension part (22) is exposed outside the positive end polar frame (101), and the liquid blocking structure (A) is arranged on the extension part (22).
6. The electrolytic cell according to claim 1, wherein: in the electrolytic cell axis (H), the polar frame (10) between the two polar frames (10) located at the outermost side in the polar frame stack is an intermediate polar frame (102); at least one of the intermediate polar frames (102) is provided with the liquid blocking structure (A).
7. The electrolytic cell of any one of claims 1-6, wherein, The liquid blocking structure (A) is a groove recessed inward from the outer circumferential surface or a protrusion protruding from the outer circumferential surface.
8. The electrolytic cell of claim 7, wherein, The protrusion is an elastic member and is detachably arranged on the outer circumferential surface.
9. The electrolytic cell according to claim 7, wherein: The width of the groove in the electrolytic cell axial direction (H) is 4mm-18mm, and the recess depth of the groove is 3mm-15mm; or The protruding height of the protrusion is 3mm-15mm.