Integrated bipolar plate of electrolytic bath

Abstract

The integrated bipolar plate comprises a first polar plate and a second polar plate, a first supporting net, a diaphragm and a second supporting net are sequentially arranged between the first polar plate and the second polar plate, and a first sealing ring is arranged between the periphery of the first polar plate and the periphery of the second polar plate. A second sealing ring is arranged on the peripheral side of the diaphragm, and the second sealing ring is propped against the first polar plate and the second polar plate. The first sealing ring is used for sealing a gap between the first polar plate and the second polar plate and connecting the first polar plate and the second polar plate together. Similarly, the second sealing ring seals the diaphragm and simultaneously connects the first polar plate and the second polar plate together. According to the integrated bipolar plate of the electrolytic bath, the welding procedure of the electrode frame and the polar plate is omitted while good sealing performance is achieved, and the problems of deformation and weld joint corrosion caused by welding can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of water electrolysis hydrogen production equipment, especially relates to a electrolytic cell integrated bipolar plate. BACKGROUND

[0002] The electrolytic cell is the main equipment of the water electrolysis hydrogen production system, and is composed of electrolytic cells in series and parallel connection, the electrolytic cell in the related art is composed of a polar frame, a polar plate and a diaphragm, wherein the polar frame and the polar plate are firmly combined by welding technology, however, the welding process requires a relatively strict processing technology, and deformation and weld corrosion are prone to occur. SUMMARY

[0003] The technical purpose of the utility model is to provide a electrolytic cell integrated bipolar plate, which aims to solve the problems of deformation and weld corrosion caused by welding of the electrolytic cell.

[0004] To solve the above technical problems, the utility model discloses a electrolytic cell integrated bipolar plate, which comprises: a first polar plate and a second polar plate, a first support net, a diaphragm and a second support net are sequentially arranged between the first polar plate and the second polar plate, a first sealing ring is arranged between the outer periphery of the first polar plate and the outer periphery of the second polar plate, a second sealing ring is arranged on the periphery of the diaphragm, and the second sealing ring is in abutment with the first polar plate and the second polar plate.

[0005] The first polar plate is provided with a first flow channel hole, a second flow channel hole and a third flow channel hole, the second polar plate is provided with a fourth flow channel hole, a fifth flow channel hole and a sixth flow channel hole, the first flow channel hole corresponds in position to the fourth flow channel hole, the second flow channel hole corresponds in position to the fifth flow channel hole, and the third flow channel hole corresponds in position to the sixth flow channel hole.

[0006] Further, the electrolytic cell integrated bipolar plate comprises a support block, the support block is arranged between the first polar plate and the second polar plate, and the support block is arranged between the first flow channel hole or the second flow channel hole, or arranged on the periphery of the first flow channel hole or the periphery of the second flow channel hole.

[0007] Further, the support block is a hollow structure, and the support block is provided with a plurality of uniformly distributed reinforcing ribs.

[0008] Further, the first flow channel hole and the second flow channel hole are arranged on the first side of the first polar plate, the third flow channel hole is arranged on the second side of the first polar plate, and the first side and the second side are opposite sides.

[0009] Further, the first and second polar plates are circular or square, and the first and second polar plates are provided with two-stage steps on the side, the two-stage steps including a first-stage step and a second-stage step, and the second-stage step is closer to the center of the first polar plate than the first-stage step.

[0010] Further, the first sealing ring corresponds to the position of the first-stage step, and the second sealing ring corresponds to the position of the second-stage step.

[0011] Further, the first and second sealing rings are integrally formed.

[0012] Further, the first and / or second sealing ring is made of one or a combination of polyphenylene sulfide, polyphenyl sulfone, polysulfone, butyronitrile, and fluoroplastic.

[0013] Further, the electrolytic cell integrated bipolar plate is provided with a positioning hole.

[0014] Further, the first, second, fourth and fifth flow channel holes are provided with sealing bosses on the side, the sealing bosses are located on the side of the first and second polar plates facing the diaphragm, and the sealing bosses abut against the diaphragm.

[0015] The utility model discloses an electrolytic cell integrated bipolar plate, which comprises a first polar plate and a second polar plate, a first supporting net, a diaphragm and a second supporting net are sequentially arranged between the first polar plate and the second polar plate, a first sealing ring is arranged between the outer periphery of the first polar plate and the outer periphery of the second polar plate, a second sealing ring is arranged on the side of the diaphragm, and the second sealing ring abuts against the first polar plate and the second polar plate. The first sealing ring seals the gap between the first polar plate and the second polar plate and connects the first polar plate and the second polar plate together. Similarly, the second sealing ring seals the diaphragm and connects the first polar plate and the second polar plate together. The electrolytic cell integrated bipolar plate of the utility model has good sealing performance, eliminates the welding process of the polar frame and the polar plate, and can avoid deformation and corrosion caused by welding. ACCURACY OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the electrolytic cell integrated bipolar plate in the embodiment of the utility model;

[0017] Figure 2 is an internal structure schematic view of the first polar plate / second polar plate group building electrolytic cell in the embodiment of the utility model;

[0018] Figure 3 is Figure 1 the sectional view along line A-A in the embodiment of the utility model;

[0019] Figure 4 is a cross-sectional structure diagram of the support block in the embodiment of the utility model;

[0020] Figure 5 is a structural schematic diagram of the first / second polar plate in the embodiment of the utility model;

[0021] Figure 6 is a principle diagram of the electrolytic cell integrated bipolar plate in the embodiment of the utility model.

[0022] In the drawings, various reference signs represent: 101, first polar plate; 102, second polar plate; 2, support block; 21, reinforcing rib; 3, first flow channel hole; 4, second flow channel hole; 51, first support net; 52, second support net; 6, positioning hole; 7, third flow channel hole; 8, diaphragm; 9, first sealing ring; 10, second sealing ring; 11, fourth flow channel hole; 12, fifth flow channel hole; 13, sixth flow channel hole; 14, first level; 15, second level. DETAILED DESCRIPTION

[0023] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model, based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0024] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the utility model.

[0025] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] Electrolyzers, as the main equipment in water electrolysis hydrogen production systems, are composed of electrolysis cells connected in series and parallel. In related technologies, electrolysis cells consist of electrode frames, electrode plates, diaphragms, etc. Among them, the electrode frames and electrode plates are firmly joined together by welding technology. However, the welding process requires relatively strict processing technology and is prone to deformation and weld corrosion.

[0027] To address the aforementioned technical problems, this utility model proposes an integrated bipolar plate for an electrolytic cell.

[0028] As attached Figure 1 The diagram shown is a structural schematic of the integrated bipolar plate of the electrolytic cell in an embodiment of this utility model; as shown in the attached diagram. Figure 2 The diagram shown is a schematic diagram of the internal structure of the electrolysis chamber assembled by the first electrode plate and the second electrode plate in an embodiment of this utility model (for example, a schematic diagram exposing the internal structure of the integrated bipolar plate of the electrolysis cell after the second electrode plate 102 is removed); as shown in the attached diagram. Figure 3 As shown, is Figure 1 Cross-sectional view along line AA; as attached Figure 5 The diagram shown is a structural schematic of the first electrode plate 101 / second electrode plate 102 in an embodiment of this utility model (the first electrode plate 101 and the second electrode plate 102 have the same structure).

[0029] Combined with appendix Figures 1-4 As can be seen, the integrated bipolar plate of the electrolytic cell includes a first electrode plate 101 and a second electrode plate 102. A first support mesh 51, a diaphragm 8, and a second support mesh 52 are sequentially arranged between the first electrode plate 101 and the second electrode plate 102. A first sealing ring 9 is provided between the outer periphery of the first electrode plate 101 and the outer periphery of the second electrode plate 102. A second sealing ring 10 is provided around the diaphragm 8, and the second sealing ring 10 abuts against the first electrode plate 101 and the second electrode plate 102. The first sealing ring 9 seals the periphery of both the first electrode plate 101 and the second electrode plate 102, forming a sealed space between the first electrode plate 101 and the second electrode plate 102. The first support mesh 51, the diaphragm 8, and the second support mesh 52 are disposed between the first electrode plate 101 and the second electrode plate 102, that is, within the sealed space between the first electrode plate 101 and the second electrode plate 102. The first sealing ring 9 seals the periphery of the first electrode plate 101 and the second electrode plate 102 on one hand, and connects the first electrode plate 101 and the second electrode plate 102 on the other hand, making the first electrode plate 101 and the second electrode plate 102 an integral unit. (See attached image) Figure 6As shown, the diaphragm 8 separates the sealed space between the first polar plate 101 and the second polar plate 102 into two spaces, which are the cathode chamber and the anode chamber respectively. The first support net 51 is located in the anode chamber, and is used for supporting the internal structure of the anode chamber and for liquid disturbance. The second support net 52 is located in the cathode chamber, and is used for supporting the internal structure of the cathode chamber and for liquid disturbance. The second sealing ring 10 is used for sealing the diaphragm 8, preventing the diaphragm 8 from communicating with the outside, thereby preventing the liquid in the cathode chamber and the anode chamber from leaking out. In addition, the second sealing ring 10 connects the first polar plate 101 and the second polar plate 102, that is, the second sealing ring 10 abuts against the first polar plate 101 and the second polar plate 102. By ensuring the sealing of the electrolytic cell through the first sealing ring 9 and the second sealing ring 10, the first polar plate 101 and the second polar plate 102 can be connected through the first sealing ring 9 and the second sealing ring 10, thereby eliminating the polar frame and saving the production cost of the electrolytic cell. In addition, the first polar plate 101 and the second polar plate 102 can be connected through the first sealing ring 9 and the second sealing ring 10, thereby eliminating the welding process of the polar frame and the polar plate, and avoiding the problems of deformation and corrosion of the welding seam caused by welding.

[0030] The first polar plate 101 is provided with a first flow hole 3, a second flow hole 4 and a third flow hole 7, the second polar plate 102 is provided with a fourth flow hole 11, a fifth flow hole 12 and a sixth flow hole 13, the first flow hole 3 corresponds to the fourth flow hole in position, the second flow hole 4 corresponds to the fifth flow hole 12 in position, and the third flow hole 7 corresponds to the sixth flow hole 13 in position. The first flow hole 3 is used for passing hydrogen, the second flow hole 4 is used for passing oxygen, and the third flow hole 7 is used for passing electrolyte. The number of the first flow hole 3, the second flow hole 4 and the third flow hole 7 can be one or more than one, and the specific number can be set according to the actual situation. The second polar plate 102 has the same structure as the first polar plate 101, and the fourth flow hole 11 is used for passing hydrogen, the fifth flow hole 12 is used for passing hydrogen, and the sixth flow hole 13 is used for passing electrolyte. The number of the fourth flow hole 11, the fifth flow hole 12 and the sixth flow hole 13 can be one or more than one, and the specific number can be set according to the actual situation.

[0031] As can be seen from the above embodiment, the electrolytic cell integrated bipolar plate of the utility model can not only have good sealing performance, but also eliminate the welding process of the polar frame and the polar plate, thereby avoiding the problems of deformation and corrosion of the welding seam caused by welding.

[0032] As shown in FIG. 1, the electrolytic cell integrated bipolar plate of the utility model comprises a first polar plate 101, a second polar plate 102, a diaphragm 8, a first sealing ring 9, a second sealing ring 10, a first support net 51 and a second support net 52. Figure 2As shown in some embodiments, the electrolytic cell integrated bipolar plate comprises a support block 2, which is arranged between the first bipolar plate 101 and the second bipolar plate 102, and is arranged between the first flow channel hole 3 or the second flow channel hole 4, or arranged on the side of the first flow channel hole 3, or arranged on the side of the second flow channel hole 4. The support block 2 is used as a flow guide and support cavity of the first flow channel hole 3, so that the first flow channel hole 3 is better isolated from the second flow channel hole 4, or the support block 2 is used as a flow guide and support cavity of the second flow channel hole 4, so that the second flow channel hole 4 is better isolated from the first flow channel hole 3.

[0033] As shown in the accompanying drawings Figure 4 As shown in some embodiments, the support block 2 is a hollow structure, and the support block 2 is provided with a plurality of reinforcing ribs 21 uniformly distributed. The function of the support block 2 is support, guide and isolation, and the internal space of the support block 2 does not affect the function of the support block 2, so the internal space of the support block 2 can be set as a hollow structure, so that the production material of the support block 2 can be saved, and the weight of the support block 2 can be reduced. The plurality of reinforcing ribs 21 can strengthen the structure of the support block 2.

[0034] The support block 2, the first support net 51 and the catalytic electrode form a plane, which is separated from the plane formed by the diaphragm 8, the second support net 52 and the catalytic electrode (not labeled in the figure) to form an electrolytic cell (not labeled in the figure). The first bipolar plate 101 and the second bipolar plate 102 form an electrolytic cell through the catalytic electrode, the diaphragm 8 and the catalytic electrode, the anode reaction produces oxygen, and the cathode reaction produces hydrogen.

[0035] As shown in the accompanying drawings Figure 5 As shown in some embodiments, the first flow channel hole 3 and the second flow channel hole 4 are arranged on the first side of the first bipolar plate 101, and the third flow channel hole 7 is arranged on the second side of the first bipolar plate 101, and the first side and the second side are opposite sides. The first flow channel hole 3, the second flow channel hole 4 and the third flow channel hole 7 are separated, so that the electrolyte from the third flow channel hole 7 into the anode chamber or the cathode chamber can be fully electrolyzed to produce more hydrogen and oxygen. The hydrogen produced by electrolysis is led out from the first flow channel hole 3, and the oxygen produced by electrolysis is led out from the second flow channel hole 4. Exemplarily, the number of the third flow channel hole 7 is two, and the support block 2 is arranged between the two third flow channel holes 7.

[0036] As shown in the accompanying drawings Figure 3As shown, in some embodiments, the first polar plate 101 and the second polar plate 102 are circular or square, and the first polar plate 101 and the second polar plate 102 are provided with two levels of steps, including a first step 14 and a second step 15, and the second step 15 is closer to the center of the first polar plate 101 than the first step 14. The design of the two levels of steps facilitates the alignment of the first polar plate 101 and the second polar plate 102, and the first step 14 and the second step 15 make the first polar plate 101 / second polar plate 102 into polar plates with different heights, so that after the first polar plate 101 and the second polar plate 102 are sealed by the first sealing ring 9 / second sealing ring 10, the electrolyte is not easy to leak out from the positions of the first step 14 and the second step 15. The first polar plate 101 and the second polar plate 102 can also be rectangular or polygonal.

[0037] In some embodiments, the first sealing ring 9 corresponds to the position of the first step 14, and the second sealing ring 10 corresponds to the position of the second step 15. In this way, the first polar plate 101 and the second polar plate 102 are sealed and connected without steps, which can improve the connection stability and sealing performance of the first polar plate 101 and the second polar plate 102.

[0038] In some embodiments, the first sealing ring 9 and the second sealing ring 10 are integrally formed, which facilitates the installation of the first sealing ring 9 and the second sealing ring 10 together, and saves the installation process.

[0039] In some embodiments, the material of the first sealing ring 9 and / or the second sealing ring 10 is one or a combination of polyphenylene sulfide, polyphenyl sulfone, polysulfone, butyronitrile, and fluoroplastic. For example, the material of the first sealing ring 9 and the second sealing ring 10 is fluoroplastic or a modified material of fluoroplastic.

[0040] As shown in the accompanying drawings, Figure 1 In some embodiments, the electrolytic cell integrated bipolar plate is provided with positioning holes 6, and the number of the positioning holes 6 is 3 or more. The positioning holes 6 facilitate the positioning of the electrolytic cell integrated bipolar plate. The processing technology of the positioning holes 6 can be punching after integrally stamping the first polar plate 101 and / or the second polar plate 102, or the positioning ring with the positioning holes 6 can be fixed on the first polar plate 101 and / or the second polar plate 102 by means of impact welding or cold welding.

[0041] In some embodiments, the periphery of the first flow channel hole 3, the second flow channel hole 4, the fourth flow channel hole 11, and the fifth flow channel hole 12 is provided with a sealing boss (not labeled in the figure), which is located on the side of the first polar plate 101 and the second polar plate 102 facing the diaphragm 8, and abuts against the diaphragm 8. The sealing boss can prevent the electrolyte in the sealed space of the first flow channel hole 3, the second flow channel hole 4, the fourth flow channel hole 11, and the fifth flow channel hole 12 from being contacted.

[0042] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electrolyzer integral bipolar plate, characterized by, The bipolar plate comprises a first polar plate and a second polar plate, a first support net, a diaphragm and a second support net are sequentially arranged between the first polar plate and the second polar plate, a first sealing ring is arranged between the periphery of the first polar plate and the periphery of the second polar plate, a second sealing ring is arranged on the periphery of the diaphragm, and the second sealing ring abuts against the first polar plate and the second polar plate; The first polar plate is provided with a first flow channel hole, a second flow channel hole and a third flow channel hole, the second polar plate is provided with a fourth flow channel hole, a fifth flow channel hole and a sixth flow channel hole, the first flow channel hole corresponds to the fourth flow channel hole in position, the second flow channel hole corresponds to the fifth flow channel hole in position, and the third flow channel hole corresponds to the sixth flow channel hole in position.

2. The electrolyzer integral bipolar plate of claim 1, wherein, The bipolar plate of the electrolytic cell is integrally formed and comprises a support block arranged between the first polar plate and the second polar plate, and the support block is arranged between the first flow channel hole or the second flow channel hole, or arranged on the periphery of the first flow channel hole or the second flow channel hole.

3. The electrolyzer integral bipolar plate of claim 2, wherein, The support block is a hollow structure and is provided with a plurality of reinforcing ribs uniformly distributed.

4. The electrolyzer integral bipolar plate of claim 1, wherein, The first flow channel hole and the second flow channel hole are arranged on a first side of the first polar plate, and the third flow channel hole is arranged on a second side of the first polar plate, and the first side and the second side are opposite sides.

5. The electrolyzer integral bipolar plate of claim 1, wherein, The first polar plate and the second polar plate are circular or square, and the periphery of the first polar plate and the second polar plate is provided with two steps, the two steps comprise a first step and a second step, and the second step is closer to the center of the first polar plate than the first step.

6. The electrolyzer integral bipolar plate of claim 5, wherein, The first sealing ring corresponds to the position of the first step, and the second sealing ring corresponds to the position of the second step.

7. The electrolyzer integral bipolar plate of claim 6, wherein, The first sealing ring and the second sealing ring are integrally formed.

8. The electrolyzer integral bipolar plate of claim 1, wherein, The material of the first sealing ring and / or the second sealing ring is one or a combination of polyphenylene sulfide, polyphenyl sulfone, polysulfone, butyronitrile and fluoroplastic.

9. The electrolyzer integral bipolar plate of claim 1, wherein, The bipolar plate of the electrolytic cell is provided with a positioning hole.

10. The electrolyzer integral bipolar plate of claim 1, wherein, The periphery of the first flow channel hole, the second flow channel hole, the fourth flow channel hole and the fifth flow channel hole is provided with a sealing boss, the sealing boss is located on the side of the first polar plate and the second polar plate facing the diaphragm, and the sealing boss abuts against the diaphragm.

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