Integrated pole frame pole plate and preparation process

Abstract

The invention provides an integrated pole frame pole plate and a preparation process. The integrated pole frame polar plate comprises a polar plate body, the thickness direction of the polar plate body is the first direction, the polar plate body is divided into an electrolysis part and an annular connecting part in the inside-outside direction, the connecting part is annularly arranged on the peripheral side of the electrolysis part, and the two side faces, in the first direction, of the electrolysis part are each provided with a mastoid structure protruding outwards; the buffer layer covers the outer surface of the connecting part, and the volume of the buffer layer can be compressed; the electrode frame is made of engineering plastics, the electrode frame is annular, the electrode frame is formed on the outer side of the buffer layer in an injection molding mode so that the buffer layer can be located between the electrode frame and the connecting part, the thickness direction of the electrode frame is the first direction, and the electrode frame is provided with a liquid inlet channel, a first outlet channel and a second outlet channel which penetrate through the electrode frame in the first direction. Therefore, the pole plate with the integrated pole frame has the advantage of high flatness of the pole plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydrogen production by electrolysis of water, and particularly relates to an integrated polar frame and polar plate and a preparation process. BACKGROUND

[0002] The alkaline water electrolysis hydrogen production electrolytic cell adopts a structure in which the polar plate and the electrode are separated, the bipolar plate is usually made of carbon steel, nickel or stainless steel material with a surface nickel plating treatment, and the structural design of the polar plate also affects the electrode resistance of the alkaline water hydrogen production electrolytic cell. On the one hand, the more the contact points between the polar plate and the electrode, the better the current transmission effect; on the other hand, the spherical convex-spherical concave type structure curved surface constitutes the cavity and the circulation channel inside the electrolytic unit, so that the electrolyte cannot directly flow upward when entering the polar plate flow channel of the electrolytic unit, increasing the disturbance of the electrolyte in the electrolytic cell, increasing the mass transfer and heat transfer of the electrolyte in the electrolytic cell, and in the electrolysis process, hydrogen and oxygen sides will continuously have gas bubbles precipitated from the electrode surface, which will form large gas bubbles, which will cause the resistance in the electrolyte to increase, the porous structure between the polar plate and the electrode will reduce the probability of forming large bubbles in the electrolyte, reduce the influence of the three-phase interface resistance, and weaken the influence of the bubbles on the current density. In the related art, the traditional metal polar frame has the disadvantages of being heavy, having large resistance at the welded connection, and being troublesome to process in batches, and the non-metallic polar frame is attracting more and more attention due to its lightweight, no need for insulation treatment, and convenience for unified batch production, but the local stress concentration caused by bolt fastening during overall assembly may cause the non-metallic polar frame to crack during use, and the coordination connection between the non-metallic polar frame and the polar plate is usually in the form of adhesion or the addition of a sealing gasket. In this assembly mode, the sealing property between the polar plate and the polar frame is poor during the electrolysis process, and there may be mutual penetration of gas and liquid on both sides. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes an integrated polar frame and polar plate and a preparation process.

[0004] The integrated polar frame and polar plate of the embodiment of the present application comprises:

[0005] The polar plate has a thickness direction as a first direction, and is divided into an electrolysis part and an annular connection part in the inner-outer direction, the connection part is annularly arranged on the circumferential side of the electrolysis part, and the electrolysis part is provided with a papillary structure protruding outward on both sides in the first direction;

[0006] The buffer layer is wrapped on the outer surface of the connection part, and the volume of the buffer layer can be compressed;

[0007] A polar frame made of engineering plastic, the polar frame being annular, the polar frame being injection molded on the outside of the buffer layer so that the buffer layer is located between the polar frame and the connecting part, the thickness direction of the polar frame being the first direction, the polar frame having a liquid inlet channel, a first outlet channel and a second outlet channel penetrating through the polar frame along the first direction, the inner annular surface of the polar frame forming an anode small chamber and a cathode small chamber with the two sides of the electrolysis part in the first direction respectively, the anode small chamber being in communication with the liquid inlet channel and the first outlet channel, the cathode small chamber being in communication with the liquid inlet channel and the second outlet channel.

[0008] Therefore, the integrated polar frame polar plate according to the embodiment of the application has the advantage of high polar plate flatness to improve the sealing performance.

[0009] In some embodiments, the polar frame is made of engineering plastic, the engineering plastic including at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyether sulfone, polyformaldehyde, polyimide and modified polyphenylene ether;

[0010] The buffer layer is made of porous material, the thickness of the buffer layer being greater than or equal to 1 mm and less than or equal to 2 mm.

[0011] In some embodiments, the engineering plastic is glass fiber modified polyether ether ketone;

[0012] The buffer layer is made of foamed nickel.

[0013] In some embodiments, the connecting part includes

[0014] A connecting part body, the connecting part body being annular, the connecting part body being annularly arranged on the circumferential side of the electrolysis part;

[0015] A first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate being arranged on the outer circumferential surface of the connecting part body, each of the first clamping plate and the second clamping plate forming an included angle with the outer circumferential surface of the connecting part body, the thickness direction of the first clamping plate and the second clamping plate being the first direction, the liquid inlet channel penetrating through the first clamping plate, the first outlet channel and the second outlet channel penetrating through the second clamping plate.

[0016] In some embodiments, at least three positioning clamping points are arranged on the outer circumferential surface of the connecting part body;

[0017] The first clamping plate and the second clamping plate are located on both sides of the connecting part body in the radial direction.

[0018] In some embodiments, the two sides of the polar frame in the first direction sequentially include an annular electrode placement groove, a diaphragm placement groove and a channel area from inside to outside;

[0019] The electrode placement groove and the diaphragm placement groove are both step grooves, the electrode placement groove has an electrode placement surface which is perpendicular to the first direction, and the electrode placement surface is located on the side of the diaphragm placement groove adjacent to the electrolysis part in the first direction;

[0020] The liquid inlet channel, the first outlet channel and the second outlet channel are all arranged on the channel area;

[0021] The channel area has a plurality of annular sealing grooves which are sequentially arranged from the inside to the outside, and the plurality of sealing grooves are located on the outside of the liquid inlet channel, the first outlet channel and the second outlet channel;

[0022] One side of the polar frame in the first direction has a first communication groove and a second communication groove, the anode small chamber is communicated with the liquid inlet channel through at least one first communication groove, and the anode small chamber is communicated with the first outlet channel through at least one second communication groove;

[0023] The other side of the polar frame in the first direction has a third communication groove and a fourth communication groove, the cathode small chamber is communicated with the liquid inlet channel through at least one third communication groove, and the cathode small chamber is communicated with the second outlet channel through at least one fourth communication groove.

[0024] The application further provides a preparation process of the integrated polar frame polar plate.

[0025] S1, preparing a polar plate;

[0026] S2, coating a buffer layer with a compressible volume on the outer surface at the edge of the polar plate;

[0027] S3, using engineering plastic to injection mold a polar frame to coat the buffer layer at the edge of the polar plate, so that the polar frame is fixed on the polar plate.

[0028] In some embodiments, in the step S1, a substrate is cut according to a preset shape to form the polar plate, at least three outwardly protruding positioning points are formed on the outer circumferential surface of the polar plate, and the polar plate is stamped to form a papillary structure which protrudes outward in the thickness direction of the polar plate;

[0029] In the step S2, a porous material is coated on the outer surface at the edge of the polar plate to form the buffer layer;

[0030] In the step S3, the polar plate coated with the buffer layer is fixed in an injection mold, the injection mold is preheated, and an engineering plastic is injected into the injection mold so as to form the polar frame at the edge of the polar plate.

[0031] In some embodiments, in the step S1, the surface of the polar plate is subjected to a nickel electroplating treatment;

[0032] In the step S2, the thickness of the buffer layer is greater than or equal to 1 mm and less than or equal to 2 mm;

[0033] In the step S3, the engineering plastic comprises at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyether sulfone, polyformaldehyde, polyimide, and modified polyphenylene ether.

[0034] In some embodiments, the engineering plastic is glass fiber modified polyether ether ketone. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a front view of an integrated polar frame polar plate according to an embodiment of the present application.

[0036] Figure 2 is a perspective view of an integrated polar frame polar plate according to an embodiment of the present application.

[0037] Figure 3 is a perspective view of an integrated polar frame polar plate according to an embodiment of the present application.

[0038] Figure 4 is a perspective view of a polar plate according to an embodiment of the present application.

[0039] Figure 5 is a front view of a polar plate according to an embodiment of the present application.

[0040] REFERENCE NUMERALS:

[0041] 1, polar plate, 11, electrolysis part, 111, papillary structure, 12, connecting part, 121, connecting part body, 122, first clamping plate, 123, second clamping plate, 124, positioning clamping point;

[0042] 2, polar frame, 21, electrode placement groove, 211, electrode placement surface, 22, diaphragm placement groove, 23, passage area, 24, first communication groove, 25, second communication groove, 26, third communication groove, 27, fourth communication groove, 28, sealing groove;

[0043] 31, anode small chamber, 32, cathode small chamber, 33, liquid inlet passage, 34, first outlet passage, 35, second outlet passage. DETAILED DESCRIPTION

[0044] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] The integrated pole frame plate of the present invention is described below with reference to the accompanying drawings. For example... Figures 1 to 5 As shown, the integrated electrode frame plate according to an embodiment of the present invention includes an electrode plate 1, a buffer layer and an electrode frame 2.

[0046] The thickness direction of electrode 1 is the first direction. Electrode 1 is divided into an electrolytic section 11 and an annular connecting section 12 in the inner and outer directions. The connecting section 12 is arranged around the periphery of the electrolytic section 11. The electrolytic section 11 has outwardly protruding nipple structures 111 on both sides in the first direction. Specifically, the nipple structure 11 is a spherical protrusion and is adapted to contact the electrode.

[0047] A buffer layer covers the outer surface of the connecting portion 12, and the volume of the buffer layer can be compressed. For example, the buffer layer is made of a flexible or elastic material.

[0048] The electrode frame 2 is made of engineering plastic and is annular. It is injection molded onto the outside of the buffer layer (and connecting portion 12) so that the buffer layer is located between the electrode frame 2 and the connecting portion 12. The thickness direction of the electrode frame 2 is a first direction, meaning the thickness direction of the electrode frame 2 is consistent with the thickness direction of the electrode plate 1. The electrode frame 2 has an inlet channel 33, a first outlet channel 34, and a second outlet channel 35 extending through it along the first direction. The inner annular surface of the electrode frame 2 forms an anode chamber 31 and a cathode chamber 32 with two sides of the electrolysis section 11 in the first direction, respectively. The anode chamber 31 communicates with the inlet channel 33 and the first outlet channel 34, and the cathode chamber 32 communicates with the inlet channel 33 and the second outlet channel 35. Specifically, the anode chamber 31 and the cathode chamber 32 are located on both sides of the electrolysis section 11 in the first direction. After multiple integral electrode frame plates are stacked in the first direction, a seal, an electrode, and a diaphragm are disposed between adjacent integral electrode frame plates. The electrodes are located within the anode chamber 31 and the cathode chamber 32. After the liquid enters the anode chamber 31 and the cathode chamber 32 through the inlet channel 33, the water in the anode chamber 31 and the cathode chamber 32 is electrolyzed. The oxygen and liquid generated by the electrolysis of the water in the anode chamber 31 can be discharged from the first outlet channel 34, and the hydrogen and liquid generated by the electrolysis of the water in the anode chamber 31 can be discharged from the second outlet channel 35.

[0049] According to the integrated polar frame polar plate of the embodiment of the present application, the polar frame 2 is made of engineering plastic, and the polar frame 2 is injection molded on the outside of the buffer layer, so that, in the process of the shrinkage of the molded polar frame 2, the pressure of the polar frame 2 on the buffer layer makes the volume of the buffer layer compressed and smaller, and the buffer layer can reduce the pressure of the polar frame 2 on the polar plate 1, thereby reducing the deformation of the polar plate 1, so that, after the polar frame 2 is molded, the deformation of the polar plate 1 is smaller, and the flatness of the polar plate 1 is higher. The high flatness of the polar plate 1 can make the contact effect between the designed conductive points (the points of the papillary structure 11) and the electrode better after the electrode and the diaphragm are assembled, and the clamping effect of the papillary structures 11 of the adjacent polar plates 1 on the electrode and the diaphragm is better, thereby making the electrical conduction better. If the polar plate is not flat, some convex points cannot contact the electrode, the number of conductive points is reduced, and the electrochemical performance of the electrolytic cell is directly reduced.

[0050] According to the integrated polar frame polar plate of the embodiment of the present application, the polar frame 2 is made of engineering plastic, and the polar frame 2 is injection molded on the outside of the buffer layer, so that, in the process of the shrinkage of the molded polar frame 2, the pressure of the polar frame 2 on the buffer layer makes the volume of the buffer layer compressed and smaller, and the buffer layer can reduce the pressure of the polar frame 2 on the polar plate 1, thereby reducing the deformation of the polar plate 1, so that, after the polar frame 2 is molded, the deformation of the polar plate 1 is smaller, and the flatness of the polar plate 1 is higher. The high flatness of the polar plate 1 can make the contact effect between the designed conductive points (the points of the papillary structure 11) and the electrode better after the electrode and the diaphragm are assembled, and the clamping effect of the papillary structures 11 of the adjacent polar plates 1 on the electrode and the diaphragm is better, thereby making the electrical conduction better. If the polar plate is not flat, some convex points cannot contact the electrode, the number of conductive points is reduced, and the electrochemical performance of the electrolytic cell is directly reduced.

[0051] Therefore, the integrated polar frame polar plate according to the embodiment of the present application has the advantage of high flatness of the polar plate 1.

[0052] The present application also provides a preparation process of the integrated polar frame polar plate, and the preparation process of the integrated polar frame polar plate according to the embodiment of the present application comprises the following steps:

[0053] S1, preparing the polar plate 1.

[0054] S2, coating the buffer layer with a volume that can be compressed on the outer surface of the edge of the polar plate 1.

[0055] S3, injection molding the polar frame 2 to coat the buffer layer at the edge of the polar plate 1 by using engineering plastic, so that the polar frame 2 is fixed on the polar plate 1. That is, the polar frame 2 is integrated with the polar plate 1 by the injection molding method.

[0056] Therefore, the integrated polar frame polar plate prepared by the preparation process of the integrated polar frame polar plate according to the embodiment of the present application has the advantage of high flatness to improve the sealing performance.

[0057] As Figures 1 to 5 shown in the following, the integrated pole frame pole plate according to the embodiments of the present application will be specifically explained in combination with the preparation process of the integrated pole frame pole plate according to the embodiments of the present application.

[0058] In step S1, the substrate is cut according to a preset shape to form the pole plate 1, and at least three outwardly protruding positioning points 124 are formed on the outer circumferential surface of the pole plate 1.

[0059] In some embodiments, the outer circumferential surface of the connecting portion body 121 is provided with at least three positioning points 124. Specifically, the outer circumferential surface of the connecting portion body 121 is provided with four positioning points 124. For example, on the outer circumferential surface of the connecting portion body 121, there are four positioning points 124, and two positioning points 124 are arranged on the outer circumferential surface between the first clamping plate 122 and the second clamping plate 123. The four positioning points 124 are arranged symmetrically in pairs.

[0060] The first clamping plate 122 and the second clamping plate 123 are located on both sides of the connecting portion body 121 in the radial direction. For example, the first clamping plate 122 is located directly below the second clamping plate 123.

[0061] In step S1, the pole plate 1 is stamped to form the papillary structure 111 protruding outward in the thickness direction of the pole plate 1. The electrolytic portion 11 is provided with a plurality of outwardly protruding papillary structures 111 on both sides in the first direction. For example, the substrate adopts carbon steel or stainless steel plate material, and first uses laser cutting to cut the outer shape of the substrate. The single die is provided with uniformly distributed protruding stamping heads inside, and the pole plate 1 can be formed by stamping process using a single die.

[0062] In some embodiments, the stamping pressure during the stamping forming process of the pole plate 1 is 1 MPa to 5 MPa. For example, the stamping pressure during the stamping forming process of the pole plate 1 is 3 MPa.

[0063] The forming time during the stamping forming process of the pole plate 1 is 20 s to 50 s; for example, the forming time during the stamping forming process of the pole plate 1 is 40 s.

[0064] The pressure maintaining time during the stamping forming process of the pole plate 1 is 1 s to 5 s; for example, the pressure maintaining time during the stamping forming process of the pole plate 1 is 4 s.

[0065] As Figures 1 to 5 shown in some embodiments, the connecting portion 12 includes a connecting portion body 121, a first clamping plate 122 and a second clamping plate 123.

[0066] The connecting portion body 121 is annular, and the connecting portion body 121 is annularly arranged on the circumferential side of the electrolytic portion 11. Specifically, the electrolytic portion 11 is a circular plate, and the connecting portion body 121 is a circular ring.

[0067] The first clamping plate 122 and the second clamping plate 123 are arranged on the outer circumferential surface of the connecting portion body 121, each of the first clamping plate 122 and the second clamping plate 123 forms an included angle with the outer circumferential surface of the connecting portion body 121, and the thickness direction of the first clamping plate 122 and the second clamping plate 123 is the first direction. Specifically, the first clamping plate 122 and the second clamping plate 123 are protruding structures at the edges of the connecting portion body 121, so that when the pole frame 2 is wrapped at the edges of the pole plate 1, the pole frame 2 is stably connected with the pole plate 1.

[0068] The liquid inlet channel 33 penetrates the first clamping plate 122, and the first outlet channel 34 and the second outlet channel 35 penetrate the second clamping plate 123. That is, the liquid inlet channel 33, the first outlet channel 34 and the second outlet channel 35 are arranged on the pole plate 1 and the pole frame 2, and the pole plate 1 can support the area of the liquid inlet channel 33, the first outlet channel 34 and the second outlet channel 35 of the pole frame 2, so as to improve the structural strength of the integrated pole frame and pole plate. For example, the edges of the first clamping plate 122 and the second clamping plate 123 away from the connecting portion body 121 are arc-shaped edges. The first clamping plate 122 provided with the liquid inlet channel 33 and the second clamping plate 123 provided with the first outlet channel 34 and the second outlet channel 35 are machined at the corresponding positions of the two radial ends of the pole plate 1. In step S1, the surface of the pole plate 1 is subjected to electroplated nickel treatment.

[0069] In step S2, a porous material is wrapped on the outer surface at the edge of the pole plate 1 to form a buffer layer, the buffer layer is made of a porous material, and the thickness of the buffer layer is greater than or equal to 1 mm and less than or equal to 2 mm. For example, the thickness of the buffer layer is 1.5 mm.

[0070] In some embodiments, the buffer layer is made of foamed nickel. After the pole plate 1 is subjected to nickel plating treatment, the pole plate 1 edge (connecting portion 12) is wrapped with foamed nickel or other porous materials.

[0071] In step S3, the pole plate 1 wrapped with the buffer layer is fixed in an injection mold. Specifically, the pole plate 1 is provided with an injection molding mechanical clamping point and an integrated pole frame and pole plate part fastening mechanical clamping point, the mold is not disassembled and turned over, and the mold is provided with a pole plate 1 placement area.

[0072] In step S3, the injection mold is preheated, and the engineering plastic is injected into the injection mold to form the pole frame 2 at the edge of the pole plate 1. Specifically, the mold temperature during injection is between 150 and 210 degrees Celsius; the melt temperature during injection is between 330 and 400 degrees Celsius; the single injection time during injection is between 1 and 100 seconds, which varies with the size of the pole frame 2; the holding pressure after injection is between 85 and 98 percent of the injection pressure; and the holding time after injection is between 5 and 12 seconds. For example, the mold temperature during injection is 200 degrees Celsius; the melt temperature during injection is 350 degrees Celsius; the single injection time during injection is between 60 seconds; the holding pressure after injection is 90 percent of the injection pressure; and the holding time after injection is 10 seconds.

[0073] In step S3, the engineering plastic includes at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyether sulfone, polyformaldehyde, polyimide, and modified polyphenyl ether. The engineering plastic includes at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyether sulfone, polyformaldehyde, polyimide, and modified polyphenyl ether, i.e., the pole frame 2 is injection molded from at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyether sulfone, polyformaldehyde, polyimide, and modified polyphenyl ether. This can enable the pole frame 2 to have high structural strength and strong sealing after being formed. For example, the pole frame 2 is made of polyether ether ketone.

[0074] In some embodiments, the engineering plastic is glass fiber modified polyether ether ketone, and the pole frame 2 is made of glass fiber modified polyether ether ketone. The glass fiber modified polyether ether ketone is obtained by adding glass fiber to polyether ether ketone (PEEK) and melt blending, which achieves reinforcement relative to the pure polyether ether ketone matrix.

[0075] As shown in FIG. 1, in some embodiments, the pole frame 2 includes, from inside to outside in the first direction, an annular electrode placement groove 21, a diaphragm placement groove 22, and a channel area 23 on two sides in the first direction. Figure 1

[0076] The electrode placement groove 21 and the diaphragm placement groove 22 are both stepped grooves, and the openings of the electrode placement groove 21 and the diaphragm placement groove 22 are open toward the inside and away from the electrolysis part 11.

[0077] The electrode placement groove 21 has an electrode placement surface 211 that is perpendicular to the first direction and faces away from the electrolysis part 11, and the electrode placement surface 211 is located on the side of the diaphragm placement groove 22 adjacent to the electrolysis part 11 in the first direction. The electrode placement groove 21 is used to place electrodes, and the diaphragm placement groove 22 is used to place diaphragms. Specifically, the electrode placement surfaces 211 on the same side of the anode small chamber 31 are anode placement surfaces, and the electrode placement surfaces 211 on the same side of the cathode small chamber 2 are cathode placement surfaces. ​

[0078] As shown in Figure 1 , the liquid inlet channel 33, the first outlet channel 34 and the second outlet channel 35 are all arranged on the channel area 23, and the channel area 23 has a plurality of annular sealing grooves 28 arranged in sequence from inside to outside, and the plurality of sealing grooves 28 are located outside the liquid inlet channel 33, the first outlet channel 34 and the second outlet channel 35. The plurality of sealing grooves 28 facilitate the extrusion of the sealing member, thereby improving the sealing effect.

[0079] As shown in Figure 1 and Figure 2 , one side of the pole frame 2 in the first direction has a first communication groove 24 and a second communication groove 25, and the anode small chamber 31 communicates with the liquid inlet channel 33 through at least one first communication groove 24, and the anode small chamber 31 communicates with the first outlet channel 34 through at least one second communication groove 25. For example, the anode small chamber 31 communicates with the liquid inlet channel 33 through two, three or four first communication grooves 24.

[0080] As shown in Figure 3 , the other side of the pole frame 2 in the first direction has a third communication groove 26 and a fourth communication groove 27, and the cathode small chamber 32 communicates with the liquid inlet channel 33 through at least one third communication groove 26, and the cathode small chamber 32 communicates with the second outlet channel 35 through at least one fourth communication groove 27. For example, the cathode small chamber 32 communicates with the liquid inlet channel 33 through two, three or four third communication grooves 26.

[0081] In one specific embodiment, the 1.5mm thick carbon steel is cut according to the shape of the pole plate 1 to process the prototype of the integrated metal pole plate 1, and the effective diameter of the pole plate 1 is 160mm. The laser-cut 1.5mm thick carbon steel integrated metal pole plate 1 prototype is placed in a stamping die.

[0082] The stamping parameters are set, the stamping pressure is 1MPa, the forming time is 40s, and the pressure holding time is 2s. The integrated metal pole plate 1 after stamping is taken out, the surface of the integrated metal pole plate 1 is cleaned with alcohol, and then dried after cleaning.

[0083] The integrated metal pole plate 1 is soaked in 10% hydrochloric acid for pickling for 10min, and the electroplating solution is configured, and the composition of the electroplating solution is 150g / L nickel chloride, 100g / L hydrochloric acid, 10g / L boric acid, and (8g to 10g) / L ammonium chloride. The pure nickel plate is used as the anode, the integrated metal pole plate 1 is used as the cathode, the pH value of the plating solution is adjusted to 14, and the electroplating is carried out at a current density of 10A / dm 2 for 10min. The electroplated integrated metal pole plate 1 is cleaned with water and dried.

[0084] The integral metal polar plate 1 after cleaning and drying is wrapped with 1.5mm thick foamed nickel on the outer edge. The integral metal polar plate 1 wrapped with foamed nickel is placed in an integral polymer polar frame injection mold, and there is a hanging point in the mold. The polar plate is fixed in the mold through the inlet and outlet channels (liquid inlet channel 33, first outlet channel 34 and second outlet channel 35).

[0085] The integral polymer polar frame injection mold is preheated, and the mold temperature is 176℃. The glass fiber modified PEEK particles (glass fiber modified polyether ether ketone particles) are added, and the injection molding parameters are set, the melt temperature is 385℃, the injection time is 21.2s, the holding pressure is 96% of the injection pressure, and the holding time is 7.9s. After injection molding, the integral polymer polar frame polar plate is taken out.

[0086] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0087] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0088] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0089] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0090] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material or characteristic is included in at least one embodiment or example of the present application. Exemplary representations of the above terms in the specification are not necessarily directed to the same embodiment or example. Also, the described specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the specification and features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0091] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary, and are not to be construed as limiting the present application, and changes, modifications, replacements and variations of the above embodiments made by those skilled in the art are within the scope of the present application.

Claims

1. An integrated pole frame pole plate, characterized by, The plate includes a polar plate, a thickness direction of the polar plate being a first direction, the polar plate being divided into an electrolysis part and a ring-shaped connecting part in an inner-outer direction, the connecting part being annularly arranged on a circumferential side of the electrolysis part, the electrolysis part being provided with a papillary structure protruding outward on both sides in the first direction; a buffer layer, the buffer layer being wrapped on an outer surface of the connecting part, a volume of the buffer layer being compressible; a polar frame, the polar frame being made of engineering plastic, the polar frame being ring-shaped, the polar frame being injection molded on an outer side of the buffer layer so that the buffer layer is located between the polar frame and the connecting part, a thickness direction of the polar frame being the first direction, the polar frame having a liquid inlet channel, a first outlet channel and a second outlet channel penetrating the polar frame along the first direction, an inner annular surface of the polar frame forming an anode small chamber and a cathode small chamber with both sides of the electrolysis part in the first direction respectively, the anode small chamber being in communication with the liquid inlet channel and the first outlet channel, the cathode small chamber being in communication with the liquid inlet channel and the second outlet channel.

2. The integrated polar frame and polar plate according to claim 1, wherein the polar frame is made of engineering plastic, the engineering plastic including at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyethersulfone, polyformaldehyde, polyimide and modified polyphenylene ether; the buffer layer is made of porous material, a thickness of the buffer layer being greater than or equal to 1 mm and less than or equal to 2 mm.

3. The integrated polar frame and polar plate according to claim 2, wherein the engineering plastic is glass fiber modified polyether ether ketone; the buffer layer is made of foamed nickel.

4. The integral pole frame and plate according to any one of claims 1 to 3, wherein the connecting part includes a connecting part body, the connecting part body being ring-shaped, the connecting part body being annularly arranged on a circumferential side of the electrolysis part; a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate being arranged on an outer circumferential surface of the connecting part body, each of the first clamping plate and the second clamping plate forming an included angle with the outer circumferential surface of the connecting part body, a thickness direction of the first clamping plate and the second clamping plate being the first direction, the liquid inlet channel penetrating the first clamping plate, the first outlet channel and the second outlet channel penetrating the second clamping plate.

5. The integrated polar frame and polar plate according to claim 4, wherein at least three positioning clamping points are arranged on the outer circumferential surface of the connecting part body; the first clamping plate and the second clamping plate are located on both sides of the connecting part body in the radial direction.

6. The integrated polar frame and polar plate according to claim 1, wherein both sides of the polar frame in the first direction sequentially include, from inside to outside, a ring-shaped electrode placement groove, a diaphragm placement groove and a channel area; the electrode placement groove and the diaphragm placement groove are both step grooves, the electrode placement groove has an electrode placement surface, the electrode placement surface being perpendicular to the first direction, the electrode placement surface being located on a side of the diaphragm placement groove adjacent to the electrolysis part in the first direction; the liquid inlet channel, the first outlet channel and the second outlet channel are all arranged on the channel area. The channel area has a plurality of annular sealing grooves arranged from inside to outside, and the plurality of sealing grooves are located outside the liquid inlet channel, the first outlet channel and the second outlet channel; One side of the polar frame in the first direction has a first communication groove and a second communication groove, and the anode small chamber communicates with the liquid inlet channel through at least one first communication groove, and the anode small chamber communicates with the first outlet channel through at least one second communication groove; The other side of the polar frame in the first direction has a third communication groove and a fourth communication groove, and the cathode small chamber communicates with the liquid inlet channel through at least one third communication groove, and the cathode small chamber communicates with the second outlet channel through at least one fourth communication groove.

7. A process for the production of an integral pole frame and pole plate according to any one of claims 1 to 6, characterized in that The method comprises the following steps: S1, preparing a polar plate; S2, coating a compressible buffer layer on the outer surface at the edge of the polar plate; S3, using engineering plastic to injection mold a polar frame to coat the buffer layer at the edge of the polar plate, so that the polar frame is fixed on the polar plate.

8. The integrated polar frame and polar plate preparation process according to claim 7, wherein, in the step S1, the substrate is cut according to a predetermined shape to form the polar plate, and at least three outwardly protruding positioning points are formed on the outer circumferential surface of the polar plate, and the polar plate is stamped to form a papillary structure protruding outward in the thickness direction of the polar plate; in the step S2, a porous material is coated on the outer surface at the edge of the polar plate to form the buffer layer; in the step S3, the polar plate coated with the buffer layer is fixed in an injection mold, the injection mold is preheated, and engineering plastic is injected into the injection mold to form the polar frame at the edge of the polar plate.

9. The integrated polar frame and polar plate preparation process according to claim 8, wherein, in the step S1, the surface of the polar plate is subjected to a nickel electroplating treatment; in the step S2, the thickness of the buffer layer is greater than or equal to 1 mm and less than or equal to 2 mm; in the step S3, the engineering plastic comprises at least one of polysulfone, polyether ether ketone, glass fiber modified polyether ether ketone, polyphenylene sulfide, polyaryletherketone, polyether sulfone, polyformaldehyde, polyimide and modified polyphenyl ether.

10. The integral pole frame and plate fabrication process of claim 9, wherein, The engineering plastic is glass fiber modified polyether ether ketone.

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