Bipolar plate of rectangular alkali liquor electrolytic bath

Abstract

The invention relates to a rectangular alkali liquor electrolytic bath bipolar plate, and relates to the technical field of electrolytic baths, the bipolar plate comprises a main polar plate, the main polar plate is rectangular; the polar plate frame is rectangular, the polar plate frame sleeves the outer side of the main polar plate, an oxygen side inlet, an oxygen side outlet, a hydrogen side inlet and a hydrogen side outlet are formed in the polar plate frame, the main polar plate is located between the oxygen side inlet and the oxygen side outlet in the length direction of the main polar plate, and the main polar plate is located between the hydrogen side inlet and the hydrogen side outlet in the length direction of the main polar plate; the oxygen side runner region is positioned on one side of the thickness direction of the main polar plate, and the oxygen side inlet and the oxygen side outlet are both communicated with the oxygen side runner region; the hydrogen side runner region is positioned on one side, deviating from the oxygen side runner region, of the main polar plate, and the hydrogen side inlet and the hydrogen side outlet are both communicated with the hydrogen side runner region. The bipolar plate is rectangular, so that the structural strength of the bipolar plate can be improved, the working efficiency of the electrolytic cell is improved, and the possibility of safety accidents is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electrolytic cells, and in particular to a rectangular alkaline solution electrolytic cell bipolar plate. Background Art

[0002] Alkaline water electrolysis is one of the most mature water electrolysis hydrogen production technologies today. The alkaline electrolyzer consists of plates, electrodes, diaphragms and electrolytes. It has the advantages of simple structural principles, easy maintenance and relatively low costs. In the field of water electrolysis hydrogen production, alkaline solution electrolyzers occupy the largest market share in the world.

[0003] At present, the bipolar plates in common alkaline solution electrolyzers are mostly circular or square structures, and the bipolar plates are usually provided with a nipple structure or a straight channel structure. The provision of the nipple structure or the straight channel structure can improve the uniformity of the alkaline solution flow.

[0004] Since the thickness of the bipolar plate is relatively low, generally less than 2mm, and the bipolar plate is mostly circular or square, after the bipolar plate is installed, the sides of the bipolar plate are fixed by bolts, while the center of the bipolar plate is relatively weak and easily affected by pressure fluctuations. In particular, when the diameter of the circular bipolar plate reaches more than 1.5m or the side length of the square bipolar plate reaches more than 1.5m, when the electrolyzer is working normally, the flow of alkali solution and the flow of bubbles will produce pressure fluctuations, which will cause the center of the bipolar plate to shift and vibrate due to the pressure riot, which will easily reduce the working efficiency of the electrolyzer and even cause safety accidents. Summary of the invention

[0005] The present application provides a rectangular alkaline solution electrolytic cell bipolar plate, the purpose of which is to improve the structural strength of the bipolar plate, reduce the impact of pressure fluctuations generated during normal operation of the electrolytic cell on the center position of the bipolar plate, improve the working efficiency of the electrolytic cell, and reduce the possibility of safety accidents.

[0006] The present application provides a rectangular alkaline solution electrolytic cell bipolar plate adopting the following technical solution: A rectangular alkaline solution electrolyzer bipolar plate comprises a main pole plate, which is rectangular; a pole plate frame, which is rectangular and is sleeved on the outside of the main pole plate, and is provided with an oxygen side inlet, an oxygen side outlet, a hydrogen side inlet and a hydrogen side outlet, wherein the main pole plate is located between the oxygen side inlet and the oxygen side outlet along its own length direction, and the main pole plate is located between the hydrogen side inlet and the hydrogen side outlet along its own length direction; an oxygen side flow channel area, wherein the oxygen side flow channel area is located on one side of the main pole plate in the thickness direction, and the oxygen side inlet and the oxygen side outlet are both connected to the oxygen side flow channel area; and a hydrogen side flow channel area, wherein the hydrogen side flow channel area is located on the side of the main pole plate away from the oxygen side flow channel area, and the hydrogen side inlet and the hydrogen side outlet are both connected to the hydrogen side flow channel area.

[0007] By adopting the above technical solution, the main plate and the plate frame are arranged to form a bipolar plate, and the plate frame is provided with an oxygen side inlet and an oxygen side outlet, and both of the oxygen side inlet and the oxygen side outlet are connected to the oxygen side flow channel area of ​​the main plate, and the plate frame is provided with a hydrogen side inlet and a hydrogen side outlet, and both of the hydrogen side inlet and the hydrogen side outlet are connected to the hydrogen side flow channel area of ​​the main plate. This allows the areas for preparing oxygen and hydrogen to be formed on both sides of the bipolar plate, thereby realizing the function of the bipolar plate.

[0008] Since both the main plate and the plate frame are rectangular, bolts are installed around the bipolar plate when the bipolar plate is installed. This makes the center of the bipolar plate closer to the bolts on both sides of the width direction of the bipolar plate, so that the center of the bipolar plate has a stable support. This reduces the deformation caused by mechanical stress impact at the center of the bipolar plate, and also reduces the displacement and vibration caused by pressure fluctuations at the center of the bipolar plate.

[0009] Therefore, the shape and structural setting of the bipolar plate can improve the structural strength of the bipolar plate, reduce the impact of pressure fluctuations generated during normal operation of the electrolyzer on the center position of the bipolar plate, improve the working efficiency of the electrolyzer, and reduce the possibility of safety accidents.

[0010] Optionally, the length direction of the pole plate frame is the same as the length direction of the main pole plate, the length of the pole plate frame is 2m to 3m, and the width of the pole plate frame is 0.8m to 1m.

[0011] By adopting the above technical solution and setting the length and width of the plate frame, the structural dimensions of the bipolar plate are optimized, and the mechanical stability and thermal management efficiency of the bipolar plate are improved.

[0012] Optionally, the oxygen side flow channel area includes a turbulent diffusion area, a low-resistance flow channel area, a bending overflow area, a low-resistance compensation area and a turbulent collection area, and the turbulent diffusion area, the low-resistance flow channel area, the bending overflow area, the low-resistance compensation area and the turbulent collection area are connected in sequence along the length direction of the main pole plate, and the oxygen side inlet is connected to the turbulent diffusion area, and the oxygen side outlet is connected to the turbulent collection area; the turbulent diffusion area, the low-resistance flow channel area, the bending overflow area, the low-resistance compensation area and the turbulent collection area are all provided with protrusion mechanisms.

[0013] By adopting the above technical scheme, the oxygen side flow channel zone is arranged in series through the turbulent diffusion zone, the low-resistance flow channel zone, the bending flow zone, the low-resistance compensation zone and the turbulent collection zone, and a protrusion mechanism is provided in each zone. Then, when the fluid flows through the oxygen side flow channel zone, the protrusion mechanism not only increases the contact area between the fluid and the electrode, promotes the separation and discharge of bubbles, but also reduces the resistance to fluid flow, so that the electrolyzer can achieve efficient hydrogen and oxygen generation with lower energy consumption.

[0014] Optionally, the protrusion mechanism includes a plurality of mastoids, and the plurality of mastoids are arranged on the main pole plate, and the plurality of mastoids are respectively located in the turbulent diffusion zone and the turbulent collection zone.

[0015] By adopting the above technical solution, by arranging nipples in the turbulent diffusion zone and the turbulent collection zone, the presence of the nipples breaks the laminar state of the fluid, so that when the fluid passes through the main pole plate, the fluid can be mixed more fully between two adjacent nipples, which can reduce the fluid concentration difference, temperature difference and flow resistance, and achieve better fluid distribution.

[0016] Optionally, the hydrogen side flow channel area includes a diffusion mirror area and a collection mirror area, the diffusion mirror area is connected to the hydrogen side inlet, the collection mirror area is connected to the hydrogen side outlet, and the diffusion mirror area is connected to the collection mirror area; the main pole plate is also provided with a plurality of nipples on the side facing the hydrogen side flow channel area, and the plurality of nipples are respectively located in the diffusion mirror area and the collection mirror area.

[0017] By adopting the above technical solution, by setting a diffusion mirror area and a collection mirror area in the hydrogen side flow channel area, and arranging nipples in the diffusion mirror area and the collection mirror area, the fluid on the side of the main board facing the hydrogen flow channel area can be mixed more fully between two adjacent nipples.

[0018] Optionally, the protrusion mechanism includes a plurality of long protrusions, which are arranged on the main pole plate, and the plurality of long protrusions are respectively located in the low-resistance flow channel area and the low-resistance compensation area; the length direction of the long protrusions is arranged along the length direction of the main pole plate, and the plurality of long protrusions are arranged in sequence along the width direction of the main pole plate, and a low-resistance flow channel is formed between two adjacent long protrusions.

[0019] By adopting the above technical solution, long protrusions are arranged in the low-resistance flow channel area and the low-resistance compensation area, and the long protrusions are arranged on the main electrode plate to form a low-resistance flow channel. The low-resistance flow channel reduces the resistance to fluid flow and improves the flow rate and distribution uniformity of the fluid in the electrolytic cell.

[0020] Optionally, a plurality of long grooves are provided on the side of the main pole plate away from the long protrusion, and the long grooves are provided in a one-to-one correspondence with the long protrusions, and the long grooves and the long protrusions are provided in correspondence with each other along the thickness direction of the main pole plate; the hydrogen side flow channel area also includes a flow channel mirror area and a compensation mirror area, and the hydrogen side inlet, the flow channel mirror area, the compensation mirror area and the hydrogen side outlet are connected in sequence; and a plurality of the long grooves are respectively located in the flow channel mirror area and the compensation mirror area.

[0021] By adopting the above technical solution, a plurality of long grooves are arranged on the side of the main plate away from the long protrusion, and the long grooves are located in the hydrogen side flow channel area. Since the volume of hydrogen after water electrolysis is at least twice the volume of oxygen, the arrangement of the long grooves can increase the space of the hydrogen side flow channel area, and the arrangement of the long protrusions can reduce the space of the oxygen side flow channel area, which makes the space of the hydrogen side flow channel area larger than the space of the oxygen side flow channel area, so when using the bipolar plate, it is beneficial to maintain the balance of hydrogen pressure and oxygen pressure on both sides of the bipolar plate.

[0022] Optionally, the long protrusion includes a plurality of short protrusions, the length directions of the plurality of short protrusions are arranged along the length direction of the main pole plate, the plurality of short protrusions are arranged in sequence and spaced apart along their own length directions, and a mixing flow channel is formed between two adjacent short protrusions.

[0023] By adopting the above technical solution, the long protrusion is composed of a plurality of short protrusions, and a mixing channel is formed between two adjacent short protrusions. Thus, the setting of the mixing channel promotes the lateral flow of the fluid and improves the mixing effect of the fluid.

[0024] Optionally, the protrusion mechanism includes a plurality of bullet-shaped protrusions, the bullet-shaped protrusions are arranged on the main pole plate, and the bullet-shaped protrusions are located in the bending flow area; and the length directions of the plurality of bullet-shaped protrusions are inclined to the length direction of the main pole plate.

[0025] By adopting the above technical solution, a bullet-shaped protrusion is set in the bend overflow area. When the fluid flows through the bend overflow area, the presence of the bullet-shaped protrusion breaks the laminar flow state of the fluid, which enables the fluid to be mixed evenly. Since there are several bullet-shaped protrusions, the fluid will flow through the flow channel between two adjacent bullet-shaped protrusions. Since the bullet-shaped protrusions are set at an angle, the bubbles generated by electrolysis will be pushed by the fluid along the length direction of the bullet-shaped protrusions under the impetus of the flowing fluid, and then the bubbles can be quickly pushed to both sides of the bend overflow area, realizing the rapid transportation of bubbles, reducing the increase in resistance caused by the presence of bubbles, and thus ensuring the electrolysis efficiency.

[0026] Optionally, the hydrogen side flow channel area also includes a diffuse flow mirror area, and the hydrogen side inlet and the hydrogen side outlet are both connected to the diffuse flow mirror area; and a plurality of the bullet-shaped protrusions are also provided on the side of the main electrode plate facing the hydrogen side flow channel area.

[0027] By adopting the above technical solution, since the hydrogen side flow channel area includes a diffuse flow mirror area, and the diffuse flow mirror area is also provided with a number of bullet-shaped protrusions, the diffuse flow mirror area and the bent diffuse flow area have the same function, and both are conducive to the transportation of bubbles.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application makes the bipolar plate rectangular by coordinating the rectangular main electrode plate and the rectangular electrode plate frame, which can improve the structural strength of the bipolar plate, improve the working efficiency of the electrolytic cell, and reduce the possibility of safety accidents.

[0029] 2. The present application can optimize the fluid distribution on the bipolar plate and accelerate the transport of bubbles by coordinating the nipples, bullet-shaped protrusions and long strip protrusions.

[0030] 3. The present application adopts the coordinated arrangement of long protrusions and long grooves, which makes the space of the hydrogen side flow channel area larger than the space of the oxygen side flow channel area, which is beneficial to maintaining the balance of hydrogen pressure and oxygen pressure on both sides of the bipolar plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view of the oxygen side flow channel area of ​​the bipolar plate of the present application.

[0032] Figure 2 It is a front view of the hydrogen side flow channel area of ​​the bipolar plate of the present application.

[0033] Figure 3 It is a schematic diagram of the overall structure of the oxygen side flow channel area of ​​the bipolar plate of the present application.

[0034] Figure 4 It is a schematic diagram of the overall structure of the hydrogen side flow channel area of ​​the bipolar plate of the present application.

[0035] In the figure, 1, main electrode plate; 2, electrode plate frame; 21, oxygen side inlet; 22, oxygen side outlet; 23, hydrogen side inlet; 24, hydrogen side outlet; 25, flow channel groove; 3, oxygen side flow channel area; 31, turbulent diffusion area; 32, low resistance flow channel area; 321, low resistance flow channel; 33, bending diffuse flow area; 331, bending area; 34, low resistance compensation area; 35, turbulent collection area; 4, hydrogen side flow channel area; 41, diffusion mirror area; 42, flow channel mirror area; 43, diffuse flow mirror area; 44, compensation mirror area; 45, collection mirror area; 5, protrusion mechanism; 51, nipple; 52, circular groove; 53, long strip protrusion; 531, short strip protrusion; 54, long strip groove; 541, short strip groove; 55, bullet head protrusion; 56, bullet head groove. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 -Attached Figure 4 , further details of this application are given.

[0037] A rectangular alkaline solution electrolytic cell bipolar plate, referring to Figure 1 , including a main pole plate 1, the main pole plate 1 is rectangular, and a pole plate frame 2 is sleeved on the outer side of the main pole plate 1, the inner side wall of the pole plate frame 2 is fixedly connected to the outer side wall corresponding to the main pole plate 1, and the pole plate frame 2 is arranged in a rectangular shape.

[0038] In this embodiment, the length of the plate frame 2 is 2m to 3m, and the width of the plate frame 2 is 0.8m to 1m. Such a size setting makes the bipolar plate rectangular, and when the bipolar plate is installed, bolts are installed on the sides of the bipolar plate. Since the bipolar plate is rectangular, the center of the bipolar plate is closer to the bolts on both sides of the width direction of the bipolar plate, and the center of the bipolar plate has a stable support, which makes the deformation caused by mechanical stress impact at the center of the bipolar plate smaller, and also makes the displacement and vibration caused by pressure fluctuation at the center of the bipolar plate smaller.

[0039] When installing the bipolar plate of the present application, a plurality of bolts are evenly spaced in sequence along the length direction of the bipolar plate, and the spacing between two adjacent bolts is 0.3 m. This bolt arrangement makes the gravitational force borne by each bolt relatively small.

[0040] Reference Figure 1 and Figure 2 A hydrogen side flow channel area 4 is arranged on one side of the main electrode plate 1 in the thickness direction, and an oxygen side flow channel area 3 is arranged on the other side.

[0041] Reference Figure 1 and Figure 2The plate frame 2 is provided with an oxygen side inlet 21, an oxygen side outlet 22, a hydrogen side inlet 23 and a hydrogen side outlet 24, the hydrogen side inlet 23 and the hydrogen side outlet 24 are arranged at intervals along the length direction of the main plate 1, and the main plate 1 is located between the hydrogen side inlet 23 and the hydrogen side outlet 24, the oxygen side inlet 21 and the oxygen side outlet 22 are arranged at intervals along the length direction of the main plate 1, and the main plate 1 is located between the oxygen side inlet 21 and the oxygen side outlet 22. In this embodiment, the hydrogen side outlet 24 and the oxygen side outlet 22 are located on the same side of the main plate 1 in the length direction, and the oxygen side inlet 21 and the hydrogen side inlet 23 are located on the same side of the main plate 1 in the length direction.

[0042] Reference Figure 1 and Figure 2 A plurality of flow channels 25 are provided on both sides of the plate frame 2 in the thickness direction. One end of the flow channel 25 is connected to the hydrogen side inlet 23, and the other end is connected to the hydrogen side flow channel area 4; one end of the flow channel 25 is connected to the hydrogen side outlet 24, and the other end is connected to the hydrogen side flow channel area 4. One end of the flow channel 25 is connected to the oxygen side inlet 21, and the other end is connected to the oxygen side flow channel area 3; one end of the flow channel 25 is connected to the oxygen side outlet 22, and the other end is connected to the oxygen side flow channel area 3.

[0043] Such a structural setting meets the structural requirements of the bipolar plate and can thus realize the functions of the bipolar plate.

[0044] Reference Figure 3 and Figure 4 The main pole plate 1 is provided with a protrusion mechanism 5, which includes a plurality of nipples 51 and a plurality of bullet-shaped protrusions 55. The plurality of nipples 51 and the plurality of bullet-shaped protrusions 55 are arranged on both sides of the thickness direction of the main pole plate 1, and the nipples 51 and the bullet-shaped protrusions 55 are fixedly connected to the main pole plate 1. The combination of the nipples 51 and the bullet-shaped protrusions 55 on the main pole plate 1 enables the fluid to be mixed more fully between two adjacent nipples 51 and two adjacent bullet-shaped protrusions 55 when passing through the hydrogen side flow channel area 4 and the oxygen side flow channel area 3 on the main pole plate 1, which can reduce the fluid concentration difference, temperature difference and flow resistance, and achieve better fluid distribution.

[0045] Reference Figure 1 The oxygen side flow channel area 3 is provided with a turbulent diffusion area 31, a low-resistance flow channel area 32, a bending flow area 33, a low-resistance compensation area 34 and a turbulent collection area 35 in sequence along the length direction of the main electrode plate 1. The turbulent diffusion area 31, the low-resistance flow channel area 32, the bending flow area 33, the low-resistance compensation area 34 and the turbulent collection area 35 are connected in sequence, and the oxygen side inlet 21 is connected to the turbulent diffusion area 31 through the corresponding flow channel groove 25, and the oxygen side outlet 22 is connected to the turbulent collection area 35 through the corresponding flow channel groove 25.

[0046] When bipolar plates are used for water electrolysis, the fluid enters the oxygen side flow channel area 3 from the oxygen side inlet 21, and the fluid passes through the turbulent diffusion area 31, the low resistance flow channel area 32, the bending flow area 33, the low resistance compensation area 34 and the turbulent collection area 35 in the oxygen side flow channel area 3. In the oxygen side flow channel area 3, the fluid electrolyzes oxygen, and then the oxygen and the remaining liquid are discharged from the oxygen side outlet 22.

[0047] Reference Figure 1 and Figure 3 The turbulent diffusion zone 31 is a triangular area. There are a plurality of mastoids 51 in the turbulent diffusion zone 31 . The mastoids 51 are evenly spaced and arranged. A circular groove 52 is provided between two adjacent mastoids 51 along the length direction and the width direction of the main pole plate 1 .

[0048] In this embodiment, the turbulent diffusion zone 31 is triangular, specifically an isosceles triangle, with a base length of 1 m and a height of 0.8 m. The oxygen side inlet 21 is connected to the base of the turbulent diffusion zone 31 through the flow channel groove 25 .

[0049] In this embodiment, the height of the mastoid 51 is 4.75 mm to 10 mm, and the distance between two adjacent mastoids 51 along the length direction or the width direction of the main pole plate 1 is 10 to 15 mm.

[0050] Reference Figure 3 and Figure 4 In this embodiment, one side of the main electrode plate 1 in the thickness direction is raised to form a nipple 51, and the other side of the main electrode plate 1 in the thickness direction is recessed at a position corresponding to the nipple 51 to form a circular groove 52. Therefore, if the nipple 51 is located in the oxygen side flow channel area 3, a circular groove 52 is formed in the hydrogen side flow channel area 4; similarly, if the nipple 51 is located in the hydrogen side flow channel area 4, a circular groove 52 is formed in the oxygen side flow channel area 3.

[0051] When the fluid is input into the oxygen side flow channel area 3, the fluid first enters the turbulent diffusion area 31. Since the fluid delivery pressure in the middle of the main pole plate 1 is higher and the fluid delivery pressure on both sides is lower along the width direction of the main pole plate 1, the turbulent diffusion area 31 is set to be a triangle so that the fluid at the position with lower fluid delivery pressure can quickly enter the low resistance flow channel area 32. At the position with higher delivery pressure, the fluid will flow in the turbulent diffusion area 31 with high resistance; on the contrary, at the position with lower delivery pressure, the fluid will flow into the low resistance flow channel area 32 with low resistance, which is conducive to the fluid passing through the surface of the main pole plate 1 evenly.

[0052] Reference Figure 1 and Figure 3The protrusion mechanism 5 also includes a plurality of long protrusions 53, which are fixed on the side of the main pole plate 1 facing the oxygen side flow channel area 3. Moreover, the plurality of long protrusions 53 are all located in the low resistance flow channel area 32, the length direction of the long protrusions 53 is arranged along the length direction of the main pole plate 1, the width direction of the long protrusions 53 is arranged along the width direction of the main pole plate 1, and the plurality of long protrusions 53 are located on both sides of the turbulent diffusion area 31 along the width direction of the main pole plate 1, and the ends of the plurality of long protrusions 53 away from the turbulent diffusion area 31 along their own length direction are flush. The plurality of long protrusions 53 are arranged in sequence along their own width direction, and a low resistance flow channel 321 is formed between two adjacent long protrusions 53, and a low resistance flow channel 321 is also formed between the inner side wall of the plate frame 2 in the width direction and the adjacent long protrusions 53.

[0053] Reference Figure 1 and Figure 2 In this embodiment, one side of the main electrode plate 1 in the thickness direction is raised to form a long protrusion 53, and the other side of the main electrode plate 1 in the thickness direction is recessed at a position corresponding to the long protrusion 53 to form a long groove 54. Therefore, the long protrusion 53 is in the oxygen side flow channel area 3, and the long groove 54 is formed at a corresponding position in the hydrogen side flow channel area 4.

[0054] Reference Figure 1 and Figure 3 There are a number of long protrusions 53 including a number of short protrusions 531 , the length direction of the short protrusions 531 is arranged along the length direction of the main pole plate 1 , and the short protrusions 531 are arranged in sequence along their own length direction, and a mixing flow channel is formed between two adjacent short protrusions 531 .

[0055] Reference Figure 3 and Figure 4 In this embodiment, the short strip protrusion 531 is located in the oxygen side flow channel area 3, and a short strip groove 541 is formed in the hydrogen side flow channel area 4, and a plurality of short strip grooves 541 are arranged in sequence along the length direction of the main electrode plate 1 at intervals, and then, a plurality of short strip grooves 541 are combined in the hydrogen side flow channel area 4 to form a long strip groove 54.

[0056] Reference Figure 1 and Figure 3 When the fluid is transported from the turbulent diffusion zone 31 to the low-resistance flow channel zone 32, due to the arrangement of the long protrusions 53, a long low-resistance flow channel 321 is formed, which can reduce the resistance of fluid transport and increase the flow speed of the fluid. When there are a number of long protrusions 53 composed of a number of short protrusions 531, a mixing flow channel is formed between two adjacent short protrusions 531, and the mixing flow channel will make the fluid flow horizontally, so that the fluid can be mixed.

[0057] Reference Figure 1The bending and overflowing area 33 includes a plurality of bending areas 331, and the plurality of bending areas 331 are sequentially arranged at intervals along the length direction of the main pole plate 1. In this embodiment, the length of the bending and overflowing area 33 is 0.9 m, and a total of four bending areas 331 are arranged in the bending and overflowing area 33.

[0058] Reference Figure 1 and Figure 3 There are a number of bullet-shaped protrusions 55 in the bending area 331, and the bullet-shaped protrusions 55 are fixedly connected to the main pole plate 1. The bullet-shaped protrusions 55 are arranged in a matrix, and the bullet-shaped protrusions 55 are in a bullet shape. The length direction of the bullet-shaped protrusions 55 is inclined to the length direction of the main pole plate 1, and the tip of the bullet-shaped protrusion 55 is inclined toward the direction of the hydrogen side outlet 24. In addition, a bullet-shaped groove 56 is provided between two adjacent bullet-shaped protrusions 55 along the width direction of the main pole plate 1, and the tip of the bullet-shaped groove 56 is arranged parallel to the tip of the adjacent bullet-shaped protrusion 55.

[0059] In this embodiment, the tip of the bullet-shaped protrusion 55 is inclined at an angle of 65° to 85° in the width direction of the main pole plate 1; and the bullet-shaped protrusion 55 is 4.75 mm in height, 9.5 mm in bottom width, 4 mm in top plane width, and 10 mm to 30 mm in length.

[0060] Reference Figure 3 and Figure 4 In this embodiment, the bullet head protrusion 55 is located in the oxygen side flow channel area 3, and the bullet head groove 56 is formed at the corresponding position of the hydrogen side flow channel area 4. Similarly, the bullet head groove 56 is located in the oxygen side flow channel area 3, and the bullet head protrusion 55 is formed in the hydrogen side flow channel area 4.

[0061] Reference Figure 1 and Figure 3 When the fluid is input from the low-resistance flow channel area 32 to the bend overflow area 33, the fluid will flow through all the bend areas 331 in sequence. Specifically, the fluid will flow through the flow channel between two adjacent bullet-shaped protrusions 55. Since the bullet-shaped protrusions 55 are inclined, the flow channel between the two adjacent bullet-shaped protrusions 55 is inclined. Under the impetus of the flowing fluid, the bubbles generated by water electrolysis can be quickly pushed to both sides of the bend area 331, so that the bubbles can be quickly pushed by the flow channel, and the rapid transportation of the bubbles is realized, which reduces the increase in resistance caused by the presence of bubbles, and thus ensures the electrolysis efficiency.

[0062] Furthermore, since the bullet-shaped protrusions 55 in the bending area 331 are all in the shape of a bullet, when the fluid flows through, the situation where the gas gathers and swirls at the tip of the bullet-shaped protrusion 55 is reduced.

[0063] Reference Figure 1 and Figure 3The structure of the main pole plate 1 in the low resistance compensation area 34 is the same as that of the main pole plate 1 in the low resistance flow channel area 32, and the structure of the main pole plate 1 in the low resistance flow channel area 32 and the structure of the main pole plate 1 in the low resistance compensation area 34 are symmetrically arranged with the center line of the length direction of the main pole plate 1 as the symmetry axis.

[0064] Similarly, refer to Figure 1 and Figure 3 The structure of the main pole plate 1 in the turbulent collection area 35 is the same as that of the main pole plate 1 in the turbulent diffusion area 31, and the structure of the main pole plate 1 in the turbulent collection area 35 and the structure of the main pole plate 1 in the turbulent diffusion area 31 are symmetrically arranged with the center line of the length direction of the main pole plate 1 as the symmetry axis.

[0065] Reference Figure 1 After the fluid passes through the bend overflow area 33, at the position where the fluid delivery pressure is the highest, the fluid will directly flow into the turbulent collection area 35; at the position where the fluid delivery pressure is not the highest, the fluid will first flow into the low resistance compensation area 34, and then flow into the turbulent collection area 35. Due to the structural setting of the low resistance compensation area 34 and the turbulent collection area 35, it is beneficial for the fluid to pass through the surface of the main plate 1 evenly. And such a structure is conducive to collecting the gradually increased gas after the electrolysis reaction and discharging it from the bipolar plate, and collecting the gradually increased concentration of alkali solution and discharging it from the bipolar plate.

[0066] Reference Figure 2 The hydrogen side flow channel area 4 is provided with a diffusion mirror area 41, a flow channel mirror area 42, a diffuse flow mirror area 43, a compensation mirror area 44 and a collection mirror area 45 in sequence along the length direction of the main electrode plate 1. The diffusion mirror area 41, the flow channel mirror area 42, the diffuse flow mirror area 43, the compensation mirror area 44 and the collection mirror area 45 are connected in sequence along the length direction of the main electrode plate 1, and the hydrogen side inlet 23 is connected to the diffusion mirror area 41 through the corresponding flow channel groove 25, and the hydrogen side outlet 24 is connected to the collection mirror area 45 through the corresponding flow channel groove 25.

[0067] Reference Figure 1 and Figure 2 The diffusion mirror area 41 and the turbulent diffusion area 31, the flow channel mirror area 42 and the low resistance flow channel area 32, the diffuse flow mirror area 43 and the bent diffuse flow area 33, the compensation mirror area 44 and the low resistance compensation area 34, and the collection mirror area 45 and the turbulent collection area 35 are arranged opposite to each other along the thickness direction of the main pole plate 1.

[0068] Reference Figure 1 and Figure 2 The structure of the main pole plate 1 in the diffusion mirror area 41 is the same as that of the main pole plate 1 in the turbulent diffusion area 31, and the nipple 51 in the turbulent diffusion area 31 forms a circular groove 52 in the diffusion mirror area 41, and the circular groove 52 in the turbulent diffusion area 31 forms the nipple 51 in the diffusion mirror area 41.

[0069] In this embodiment, the structure of the main electrode plate 1 in the diffusion mirror area 41 is the same as the structure of the main electrode plate 1 in the collection mirror area 45 .

[0070] Reference Figure 1 and Figure 2 The long protrusions 53 in the low-resistance flow channel area 32 form corresponding long grooves 54 in the corresponding flow channel mirror area 42. In this embodiment, the low-resistance compensation area 34 and the compensation mirror area 44 have the same structure.

[0071] Reference Figure 1 and Figure 2 Considering that the volume of hydrogen after water electrolysis is at least twice the volume of oxygen, the low-resistance flow channel area 32, the low-resistance compensation area 34, the flow channel mirror area 42 and the compensation mirror area 44 are structurally arranged so that the long protrusion 53 is located in the oxygen-side flow channel area 3, and the long groove 54 is located in the hydrogen-side flow channel area 4. This makes the hydrogen-side flow channel area 4 have a larger channel space, which is conducive to maintaining the balance of hydrogen pressure and oxygen pressure on both sides of the diaphragm in the electrolyzer.

[0072] Reference Figure 3 and Figure 4 The structure of the main pole plate 1 in the bending flow area 33 is the same as that of the main pole plate 1 in the flow mirror area 43, and the bullet-head protrusion 55 in the bending flow area 33 forms a bullet-head groove 56 in the flow mirror area 43, and the bullet-head groove 56 in the bending flow area 33 forms a bullet-head protrusion 55 in the flow mirror area 43.

[0073] The implementation principle of the embodiment of the present application is as follows: the fluid is discharged through the oxygen side inlet 21, and the fluid flows through the turbulent diffusion zone 31, the low-resistance flow channel zone 32, the bend overflow zone 33, the low-resistance compensation zone 34 and the turbulent collection zone 35 in sequence. The fluid undergoes electrolysis during this process to generate oxygen, and the oxygen and the remaining fluid are discharged from the oxygen side outlet 22. The fluid is discharged through the hydrogen side inlet 23, and the fluid flows through the diffusion mirror zone 41, the flow channel mirror zone 42, the overflow mirror zone 43, the compensation mirror zone 44 and the collection mirror zone 45 in sequence. The fluid undergoes electrolysis during this process to generate hydrogen, and the hydrogen and the remaining fluid are discharged from the hydrogen side outlet 24. This realizes the function of preparing oxygen and hydrogen by electrolyzing water on the bipolar plate.

[0074] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rectangular alkaline solution electrolytic cell bipolar plate, characterized in that: include: A main pole plate (1), wherein the main pole plate (1) is rectangular; A plate frame (2), the plate frame (2) being rectangular and being sleeved on the outside of the main plate (1); the plate frame (2) being provided with an oxygen side inlet (21), an oxygen side outlet (22), a hydrogen side inlet (23) and a hydrogen side outlet (24); the main plate (1) being located between the oxygen side inlet (21) and the oxygen side outlet (22) along its own length direction; and the main plate (1) being located between the hydrogen side inlet (23) and the hydrogen side outlet (24) along its own length direction; An oxygen side flow channel region (3), the oxygen side flow channel region (3) being located on one side of the main electrode plate (1) in the thickness direction, and the oxygen side inlet (21) and the oxygen side outlet (22) are both connected to the oxygen side flow channel region (3); A hydrogen side flow channel region (4), the hydrogen side flow channel region (4) is located on a side of the main electrode plate (1) away from the oxygen side flow channel region (3), and the hydrogen side inlet (23) and the hydrogen side outlet (24) are both connected to the hydrogen side flow channel region (4).

2. A rectangular alkaline solution electrolytic cell bipolar plate according to claim 1, characterized in that: The length direction of the pole plate frame (2) is the same as the length direction of the main pole plate (1); the length of the pole plate frame (2) is 2m to 3m; and the width of the pole plate frame (2) is 0.8m to 1m.

3. The rectangular alkaline solution electrolytic cell bipolar plate according to claim 1, characterized in that: The oxygen-side flow channel region (3) comprises a turbulent diffusion region (31), a low-resistance flow channel region (32), a bend flow region (33), a low-resistance compensation region (34) and a turbulent collection region (35); the turbulent diffusion region (31), the low-resistance flow channel region (32), the bend flow region (33), the low-resistance compensation region (34) and the turbulent collection region (35) are sequentially connected along the length direction of the main pole plate (1); the oxygen-side inlet (21) is connected to the turbulent diffusion region (31), and the oxygen-side outlet (22) is connected to the turbulent collection region (35); The turbulent diffusion zone (31), the low-resistance flow channel zone (32), the bent flow zone (33), the low-resistance compensation zone (34) and the turbulent collection zone (35) are all provided with protrusion mechanisms (5).

4. A rectangular alkaline solution electrolytic cell bipolar plate according to claim 3, characterized in that: The protrusion mechanism (5) comprises a plurality of mastoids (51), wherein the plurality of mastoids (51) are arranged on the main pole plate (1), and the plurality of mastoids (51) are respectively located in the turbulent diffusion zone (31) and the turbulent collection zone (35).

5. A rectangular alkaline solution electrolytic cell bipolar plate according to claim 4, characterized in that: The hydrogen side flow channel area (4) comprises a diffusion mirror area (41) and a collection mirror area (45), the diffusion mirror area (41) is connected to the hydrogen side inlet (23), the collection mirror area (45) is connected to the hydrogen side outlet (24), and the diffusion mirror area (41) is connected to the collection mirror area (45); A plurality of the nipples (51) are also provided on the side of the main electrode plate (1) facing the hydrogen side flow channel area (4), and the plurality of the nipples (51) are respectively located in the diffusion mirror area (41) and the collection mirror area (45).

6. A rectangular alkaline solution electrolytic cell bipolar plate according to claim 3, characterized in that: The protrusion mechanism (5) comprises a plurality of long protrusions (53), the long protrusions (53) being arranged on the main pole plate (1), and the plurality of long protrusions (53) being respectively located in the low-resistance flow channel area (32) and the low-resistance compensation area (34); The length direction of the long protrusion (53) is arranged along the length direction of the main pole plate (1), and a plurality of the long protrusions (53) are arranged in sequence and spaced apart along the width direction of the main pole plate (1), and a low-resistance flow channel (321) is formed between two adjacent long protrusions (53).

7. A rectangular alkaline solution electrolytic cell bipolar plate according to claim 6, characterized in that: A plurality of long grooves (54) are arranged on a side of the main pole plate (1) away from the long protrusion (53), the long grooves (54) and the long protrusions (53) are arranged one-to-one in correspondence, and the long grooves (54) and the long protrusions (53) are arranged in correspondence along the thickness direction of the main pole plate (1); The hydrogen side flow channel area (4) further comprises a flow channel mirror area (42) and a compensation mirror area (44), and the hydrogen side inlet (23), the flow channel mirror area (42), the compensation mirror area (44) and the hydrogen side outlet (24) are sequentially connected; The plurality of long grooves (54) are respectively located in the flow channel mirror image area (42) and the compensation mirror image area (44).

8. The rectangular alkaline solution electrolytic cell bipolar plate according to claim 6, characterized in that: The long protrusion (53) comprises a plurality of short protrusions (531), the length direction of the plurality of short protrusions (531) being arranged along the length direction of the main pole plate (1), the plurality of short protrusions (531) being arranged in sequence and spaced apart along their own length direction, and a mixing flow channel being formed between two adjacent short protrusions (531).

9. The rectangular alkaline solution electrolytic cell bipolar plate according to claim 3, characterized in that: The protrusion mechanism (5) comprises a plurality of bullet-shaped protrusions (55), wherein the bullet-shaped protrusions (55) are arranged on the main pole plate (1), and the bullet-shaped protrusions (55) are located in the bent flow area (33); The length directions of the plurality of bullet-shaped protrusions (55) are arranged obliquely to the length direction of the main pole plate (1).

10. The rectangular alkaline solution electrolytic cell bipolar plate according to claim 9, characterized in that: The hydrogen side flow channel area (4) further includes a diffuse flow mirror area (43), and the hydrogen side inlet (23) and the hydrogen side outlet (24) are both in communication with the diffuse flow mirror area (43); A plurality of bullet-shaped protrusions (55) are also provided on the side of the main electrode plate (1) facing the hydrogen-side flow channel region (4).

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