Bipolar plate of electrolytic bath

Abstract

The utility model provides a bipolar plate of an electrolytic bath, and relates to the technical field of hydrogen production by water electrolysis. The bipolar plate comprises a bipolar plate body, the bipolar plate body is provided with a cavity, the end face is provided with a through liquid channel hole, a first radial hole channel is formed in the position, corresponding to the liquid channel hole, in the bipolar plate body, one end of the first radial hole channel communicates with the liquid channel hole, and the other end of the first radial hole channel communicates with the cavity. The bipolar plate of the electrolytic bath provided by the utility model solves the technical problems in the prior art that the small pressing sheet in the bipolar plate is difficult to install, easy to fall off and poor in sealing property, and the adhesive can react with the electrolyte during bonding, so that the adhesive is invalid and the electrolyte is polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production by water electrolysis, in particular to a bipolar plate of an electrolytic cell. Background Technique

[0002] In the electrolytic cell in the field of hydrogen production, the bipolar plate is located on both sides of an electrolysis cell compartment, contains flow channels, and the electrolyte enters the chamber through the flow channels.

[0003] The existing bipolar plate is formed by connecting a pole frame and a main bipolar plate. The main bipolar plate and the pole frame form a chamber; several round holes are opened on the annular plane of the pole frame. The round holes located in the upper part of the pole frame are liquid / gas outlet holes, and the round holes located in the lower part of the pole frame are liquid inlet holes. The liquid inlet holes are communicated with the chamber through guide grooves, and small pressing plate channels are installed on the guide grooves, and small pressing plates are adhered to the small pressing plate channels. Among them, the function of the small pressing plate channel is to guide the flow and support the small pressing plate, and the function of the small pressing plate is to seal the guide groove. The above-mentioned guide groove, small pressing plate channel and small pressing plate structure are aimed at realizing the separation of the liquid / gas inlet and outlet of the anode and cathode chambers on both sides of the bipolar plate.

[0004] The small pressing plate is adhered or welded to the small pressing plate channel. The bonding strength of the adhesion is low, and the operation difficulty of welding is large, resulting in the problem that the small pressing plate is prone to falling off; the joint surface between the small pressing plate and the small pressing plate channel is sealed by an adhesive or welding, and the assembly or manufacturing difficulty is large, and it is difficult to ensure the effective sealing of the joint surface area; there are manufacturing errors between the small pressing plate and the small pressing plate channel, resulting in a step difference between the upper surface of the small pressing plate and the end surface of the bipolar plate, which is not conducive to the end surface sealing of the bipolar plate, so that the effect of effectively separating the liquid / gas inlet and outlet of the anode and cathode chambers on both sides of the bipolar plate cannot be achieved, causing the gases generated by the anode and cathode to cross each other through the bipolar plate, and reducing the purity of hydrogen and oxygen generated by the electrolytic cell. In addition, if the small pressing plate is adhered to the small pressing plate channel, the adhesive will react with the electrolyte, resulting in the failure of the adhesive and the pollution of the electrolyte. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a bipolar plate of an electrolytic cell to alleviate the technical problem of poor sealing of the guide groove for communicating the liquid inlet hole with the chamber in the bipolar plate in the prior art.

[0006] In order to solve the above technical problems, the technical solution provided by the utility model lies in:

[0007] The bipolar plate of the electrolytic cell provided by the utility model includes a bipolar plate body; the bipolar plate body has a chamber, a through liquid channel hole is provided on the end surface, and a first radial hole channel is provided inside at a position corresponding to the liquid channel hole. One end of the first radial hole channel is communicated with the liquid channel hole, and the other end is communicated with the chamber.

[0008] Furthermore, there is a distance between the plane where the axis of the first radial hole channel is located and the central plane of the bipolar plate body.

[0009] Further, chambers are provided at both ends of the bipolar plate body. Two sets of the first radial channels and the liquid channel holes are provided, and the two sets of the first radial channels and the liquid channel holes are arranged at intervals along the circumferential direction of the bipolar plate body;

[0010] The planes where the axes of the two sets of the first radial channels are located are respectively on both sides of the central plane of the bipolar plate body and are respectively communicated with the two chambers;

[0011] The first radial channels in each group are communicated with the liquid channel holes.

[0012] Further, a plurality of the first radial channels and the liquid channel holes are provided in each group. The plurality of liquid channel holes are arranged at intervals along the circumferential direction of the bipolar plate body, and the plurality of first radial channels are in one-to-one correspondence and communication with the plurality of liquid channel holes.

[0013] Further, the electrolytic cell bipolar plate further includes a plug. A second radial channel is provided on the side surface of the bipolar plate body corresponding to the position of the liquid channel hole. The second radial channel is located on the side of the liquid channel hole away from the first radial channel, and one end thereof is communicated with the liquid channel hole, and the other end is provided with the plug.

[0014] Further, the axis of the first radial channel is collinear with the axis of the second radial channel.

[0015] Further, the length of the plug is less than or equal to the distance from the side surface of the bipolar plate body to the side wall of the liquid channel hole.

[0016] Further, the plug is in interference fit with the second radial channel.

[0017] Further, a chamfer is provided at the end face edge of the plug extending into the second radial channel.

[0018] Further, the bipolar plate body includes a frame and a main bipolar plate, and the frame and the main bipolar plate form the chamber;

[0019] Both the first radial channel and the liquid channel hole are provided on the frame.

[0020] Based on the above technical solutions, the analysis of the technical effects that the present utility model can achieve is as follows:

[0021] The electrolytic cell bipolar plate provided by the present utility model includes a bipolar plate body. The bipolar plate body has a chamber, and a through liquid channel hole is provided on the end face. A first radial channel is provided inside the bipolar plate body corresponding to the position of the liquid channel hole. One end of the first radial channel is communicated with the liquid channel hole, and the other end is communicated with the chamber. The first radial channel is communicated with the liquid channel hole and the chamber, realizing the communication between the liquid channel hole and the chamber.

[0022] The liquid passage hole and the chamber are communicated through the first radial passage, without the need for other sealing devices; the adhesion or welding between the small tablet and the small tablet tunnel is avoided; and the liquid passage hole and the chamber can be communicated by processing the first radial passage, reducing the assembly difficulty, with strong reliability and ensuring the sealing performance; since the first radial passage is arranged inside the bipolar plate body, the surface integrity of the upper and lower end faces of the bipolar plate body is retained, which is beneficial to the end face sealing of the bipolar plate body; in addition, since the first radial passage realizes the communication between the liquid passage hole and the chamber and no adhesive is used, the problem that the adhesive reacts with the electrolyte, resulting in the failure of the adhesive and the pollution of the electrolyte is avoided. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 The top view of the bipolar plate of the electrolytic cell provided by the embodiment of the present invention Figure 1 ;

[0025] Figure 2 is Figure 1 the partial cross-sectional view at A-A in

[0026] Figure 3 is Figure 1 the partial enlarged view at B in

[0027] Figure 4 The structural schematic diagram of the plug in the bipolar plate of the electrolytic cell provided by the embodiment of the present invention

[0028] Figure 5 The top view of the bipolar plate of the electrolytic cell provided by the embodiment of the present invention Figure 2 ;

[0029] Figure 6 is Figure 5 the partial enlarged view at C in

[0030] Icon:

[0031] 100 - bipolar plate body; 110 - liquid passage hole; 120 - chamber; 200 - plug; 210 - chamfer; 131 - second radial passage; 132 - first radial passage. Detailed Embodiments

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0034] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the utility model product is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0036] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0037] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] The following will, in conjunction with the accompanying drawings, elaborate on some embodiments of the present utility model. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0039] The liquid inlet hole of the bipolar plate needs to be communicated with the intermediate chamber. In the prior art, a solution of machining guide grooves on the upper and lower end faces of the pole frame is adopted, and the guide grooves play a role in communicating the liquid inlet hole and the chamber 120. The material above the guide grooves is removed during machining and is exposed. In order to seal it, a solution of machining small pressing plate tunnels on the guide grooves and bonding small pressing plates on the small pressing plate tunnels is adopted in the prior art; the function of the small pressing plate tunnels is to guide the flow and support the small pressing plates, and the function of the small pressing plates is to seal the guide grooves. The above-mentioned guide grooves, small pressing plate tunnels and small pressing plate structures are aimed at realizing the separation of the inlet and outlet of liquid / gas in the anode and cathode chambers on both sides of the bipolar plate. The small pressing plates are bonded or welded to the small pressing plate tunnels. The bonding strength is low, and the welding operation is difficult, resulting in the problem that the small pressing plates are prone to falling off; the joint surface between the small pressing plates and the small pressing plate tunnels is sealed through adhesives or welding, and the assembly or manufacturing difficulty is large, and it is difficult to ensure the effective sealing of the joint surface area; there are manufacturing errors between the small pressing plates and the small pressing plate tunnels, resulting in a step difference between the upper surface of the small pressing plates and the end face of the bipolar plate, which is not conducive to the end face sealing of the bipolar plate, and thus the effect of effectively separating the inlet and outlet of liquid / gas in the anode and cathode chambers on both sides of the bipolar plate cannot be achieved, causing the gases generated by the anode and cathode to cross through the bipolar plate, reducing the purity of hydrogen and oxygen generated by the electrolytic cell. In addition, if the small pressing plates are bonded to the small pressing plate tunnels, the adhesives will react with the electrolyte, resulting in the failure of the adhesives and the pollution of the electrolyte.

[0040] In view of this, referring to Figures 1 to 6 , the electrolytic cell bipolar plate provided by the present utility model includes a bipolar plate body 100. The bipolar plate body 100 has a chamber 120, and a through liquid channel hole 110 is provided on the end face. A first radial hole channel 132 is provided inside at a position corresponding to the liquid channel hole 110. One end of the first radial hole channel 132 is communicated with the liquid channel hole 110, and the other end is communicated with the chamber 120. The first radial hole channel 132 is communicated with the liquid channel hole 110 and the chamber 120 to realize the communication between the liquid channel hole 110 and the chamber 120.

[0041] Specifically, in this embodiment, the first radial hole channel 132 is machined by drilling obliquely from the direction of the liquid channel hole 110 towards the chamber 120; or, the first radial hole channel 132 is machined by drilling obliquely from the direction of the chamber 120 towards the liquid channel hole 110; that is, an included angle is formed between the axis of the first radial hole channel 132 and the axis of the liquid channel hole 110.

[0042] The liquid passage hole 110 and the chamber 120 are communicated through the first radial passage 132 without other sealing devices; the adhesion or welding between the small pressing sheet and the small pressing sheet tunnel is avoided; and the liquid passage hole 110 and the chamber 120 can be communicated by processing the first radial passage 132, which reduces the assembly difficulty, has strong reliability, and can ensure the sealing performance; since the first radial passage 132 is arranged inside the bipolar plate body 100, the surface integrity of the upper and lower end faces of the bipolar plate body 100 is reserved, which is beneficial to the end face sealing of the bipolar plate body 100; in addition, since the first radial passage 132 realizes the communication between the liquid passage hole 110 and the chamber 120 and no adhesive is used, the problem that the adhesive reacts with the electrolyte, resulting in the failure of the adhesive and the pollution of the electrolyte is avoided.

[0043] The shape and structure of the bipolar plate of the electrolytic cell are described in detail as follows:

[0044] In an alternative embodiment of the present invention, there is a spacing between the plane in which the axis of the first radial passage 132 lies and the central plane of the bipolar plate body 100.

[0045] Specifically, the axis of the first radial passage 132 is not on the central plane of the bipolar plate body 100, but in a plane biased towards one end face of the bipolar plate body 100. And two sets of first radial passages 132 are provided, wherein the axis of one set of first radial passages 132 is in a plane biased towards one side of the bipolar plate body 100, and the axis of the other set of first radial passages 132 is in a plane biased towards the other side of the bipolar plate body 100. To realize the conduction of the electrolyte and the generated gas to both sides of the bipolar plate body 100 respectively.

[0046] In an alternative embodiment of the present invention, chambers 120 are provided at both ends of the bipolar plate body 100, and two sets of first radial passages 132 and liquid passage holes 110 are provided. The two sets of first radial passages 132 and liquid passage holes 110 are arranged at intervals along the circumferential direction of the bipolar plate body 100; the planes in which the axes of the two sets of first radial passages 132 lie are respectively on both sides of the central plane of the bipolar plate body 100 and are respectively communicated with the two chambers 120; the first radial passages 132 in each set are communicated with the liquid passage holes 110.

[0047] The two sets of first radial passages 132 are respectively located on the cathode side and the anode side of the bipolar plate body 100 to realize the conduction of the electrolyte and the generated gas to both sides of the bipolar plate body 100 respectively.

[0048] In an alternative embodiment of the present invention, a plurality of first radial passages 132 and liquid passage holes 110 are provided in each set. The plurality of liquid passage holes 110 are arranged at intervals along the circumferential direction of the bipolar plate body 100, and the plurality of first radial passages 132 are in one-to-one correspondence and communication with the plurality of liquid passage holes 110.

[0049] Specifically, refer to Figure 1 In this embodiment, two groups of first radial channels 132 are arranged in a cross - setting. There are four first radial channels 132 and four liquid channels 110 in each group. The four first radial channels 132 are arranged at intervals along the circumferential direction of the bipolar plate body 100 and are in one - to - one correspondence and communication with the four liquid channels 110. Among them, two first radial channels 132 in the first group are located at the upper part of the bipolar plate body 100, and the other two first radial channels 132 are located at the lower part of the bipolar plate body 100 and are oppositely arranged; two first radial channels 132 in the second group are located at the upper part of the bipolar plate body 100, and the other two first radial channels 132 are located at the lower part of the bipolar plate body 100 and are oppositely arranged; the connection line of the axes of the first radial channels 132 corresponding to the upper and lower parts of the bipolar plate body 100 in the first group intersects with the connection line of the axes of the first radial channels 132 corresponding to the upper and lower parts of the bipolar plate body 100 in the second group.

[0050] The two groups of first radial channels 132 are respectively located on the cathode side and the anode side of the bipolar plate body 100 to realize the conduction of electrolyte and the generated gas to both sides of the bipolar plate body 100 respectively.

[0051] In an alternative embodiment of the present utility model, the electrolytic cell bipolar plate further includes a plug 200. A second radial channel 131 is provided at a position on the side surface of the bipolar plate body 100 corresponding to the liquid channel 110. The second radial channel 131 is located on the side of the liquid channel 110 away from the first radial channel 132, and one end is communicated with the liquid channel 110, and the other end is installed with a plug 200.

[0052] The plug 200 is installed at one end of the second radial channel 131 facing away from the chamber 120 to seal the second radial channel 131. Using the plug 200 to seal the second radial channel 131 avoids the adhesion or welding of the small sheet and the small sheet tunnel. The plug 200 is pressed into the second radial channel 131, with low assembly difficulty, not easy to fall off, strong reliability, and can ensure the sealing performance; because the second radial channel 131 is provided on the side surface of the bipolar plate body 100, the surface integrity of the upper and lower end surfaces of the bipolar plate body 100 is retained, which is beneficial to the end - face sealing of the bipolar plate body 100; in addition, because the plug 200 can directly seal the second radial channel 131 without using adhesives, the problem that the adhesive reacts with the electrolyte, resulting in the failure of the adhesive and the pollution of the electrolyte is avoided.

[0053] In an alternative embodiment of the present utility model, the length of the plug 200 is less than or equal to the distance from the side surface of the bipolar plate body 100 to the side wall of the liquid channel 110.

[0054] Specifically, in this embodiment, please refer to Figure 2, the length of the plug 200 is equal to the distance from the side surface of the bipolar plate body 100 to the side wall of the liquid channel hole 110, and the plug 200 does not protrude from the side surface of the bipolar plate body 100, avoiding the influence of the plug 200 on the normal flow of the electrolyte in the liquid channel hole 110 and the influence on the communication area between the liquid channel hole 110 and the first radial channel 132; and maximizing the contact area between the second radial channel 131 and the plug 200, enhancing the installation sealing strength of the plug 200; in addition, since the plug 200 does not protrude from the side surface of the bipolar plate body 100, the problem that the plug 200 is loosened due to foreign objects or human accidental collision and shaking of the plug 200 during use is avoided, ensuring the sealing of the plug 200 to the second radial channel 131.

[0055] The length of the plug 200 is less than or equal to the distance from the side surface of the bipolar plate body 100 to the side wall of the liquid channel hole 110, avoiding the plug 200 extending into the liquid channel hole 110 and affecting the normal flow of the electrolyte in the liquid channel hole 110.

[0056] In an alternative embodiment of the present invention, the axis of the first radial channel 132 is collinear with the axis of the second radial channel 131.

[0057] Specifically, please refer to Figure 2 and Figure 3 , the second radial channel 131 and the first radial channel 132 are respectively located on both sides of the liquid channel hole 110. One end of the second radial channel 131 is communicated with the liquid channel hole 110, and the other end is sleeved with the plug 200; one end of the first radial channel 132 is communicated with the liquid channel hole 110, and the other end is communicated with the chamber 120; the axis of the second radial channel 131 is collinear with the axis of the first radial channel 132, which is convenient for processing the second radial channel 131 and the first radial channel 132, that is, using tools such as drills to penetrate from the side surface of the bipolar plate body 100 towards the direction close to the chamber 120 to form the second radial channel 131 and the first radial channel 132. Of course, the axis of the second radial channel 131 is misaligned with the axis of the first radial channel 132, but the solution where both the second radial channel 131 and the first radial channel 132 are communicated with the liquid channel hole 110 should also be within the protection scope of the embodiments of the present invention.

[0058] The axis of the first radial channel 132 is collinear with the axis of the second radial channel 131, which is convenient for processing the axis of the first radial channel 132 and the second radial channel 131.

[0059] In an alternative embodiment of the present invention, the plug 200 is in interference fit with the second radial channel 131.

[0060] Specifically, the plug 200 is press-fitted into the second radial channel 131 and is in interference fit with the second radial channel 131, so as to seal one end of the second radial channel 131 away from the chamber 120.

[0061] In an alternative embodiment of the present utility model, please refer to Figure 2 and Figure 4 , a chamfer 210 is provided at the end face edge where the plug 200 extends into the second radial channel 131, which facilitates the installation of the plug 200 into the second radial channel 131.

[0062] In an alternative embodiment of the present utility model, the bipolar plate body 100 includes a frame and a main bipolar plate, and the frame and the main bipolar plate form a chamber 120; the first radial channel 132 and the liquid channel hole 110 are both provided in the frame.

[0063] Specifically, in this embodiment, both the frame and the main bipolar plate are set to be circular; of course, the solution where both the frame and the main bipolar plate are set to be square should also be within the protection scope of the embodiments of the present utility model.

[0064] The electrolyte can flow from the liquid channel hole 110 through the first radial channel 132 into the chamber 120.

[0065] In an alternative embodiment of the present utility model, a power transmission plate is welded to the outer side surface of the frame.

[0066] Specifically, the power transmission plate is set to be a conductive metal copper plate.

[0067] The power transmission plate is used to connect with an external power source.

[0068] The processing method and effect of the electrolytic cell bipolar plate will be described in detail below:

[0069] The first implementation mode:

[0070] Refer to Figure 6 , a liquid channel hole 110 with a diameter of ΦB is provided at the end face of the bipolar plate body 100; a first radial channel 132 with a diameter of ΦA is provided at the position of the liquid channel hole 110 and penetrates through to the chamber 120.

[0071] The second implementation mode:

[0072] Refer to Figure 2 , a liquid channel hole 110 with a diameter of ΦB is provided at the end face of the bipolar plate body 100; a second radial channel 131 and a first radial channel 132 with a diameter of ΦA are provided at the side surface of the bipolar plate body 100 corresponding to the position of the liquid channel hole 110 and penetrate through to the chamber 120; then the plug 200 is press-fitted into the second radial channel 131; the L1 section (the same as the second radial channel 131 above) is blocked by the plug 200, and the L2 section (the same as the first radial channel 132 above) connects the liquid channel hole 110 with the chamber 120.

[0073] Holes are machined on the side surface of the bipolar plate body 100 to form a second radial channel 131 and a first radial channel 132. Sealing the outside of the second radial channel 131 with a plug 200 has the following effects:

[0074] 1) There is no need for bonding or welding. The plug 200 is press-fitted, with low assembly difficulty, not easy to fall off, and reliable structure;

[0075] 2) The second radial channel 131 forms a seal through the interference fit with the plug 200, and the sealing performance is easy to ensure;

[0076] 3) The surface integrity of the upper and lower end faces of the bipolar plate body 100 is retained, which is beneficial to end face sealing;

[0077] 4) There is no adhesive.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrolytic cell bipolar plate, characterized in that, Comprising: A bipolar plate body (100); The bipolar plate body (100) has a chamber (120), and a through liquid channel hole (110) is provided on the end face. A first radial channel (132) is provided inside at a position corresponding to the liquid channel hole (110). One end of the first radial channel (132) is communicated with the liquid channel hole (110), and the other end is communicated with the chamber (120).

2. The bipolar plate of the electrolytic cell according to claim 1, characterized in that, There is a spacing between the plane where the axis of the first radial channel (132) is located and the central plane of the bipolar plate body (100).

3. The bipolar plate of the electrolytic cell according to claim 2, characterized in that, Chambers (120) are provided at both ends of the bipolar plate body (100). Two sets of the first radial channels (132) and the liquid channel holes (110) are provided. The two sets of the first radial channels (132) and the liquid channel holes (110) are arranged at intervals along the circumferential direction of the bipolar plate body (100); The planes where the axes of the two sets of the first radial channels (132) are located are respectively on both sides of the central plane of the bipolar plate body (100), and are respectively communicated with the two chambers (120); The first radial channels (132) within each set are communicated with the liquid channel holes (110).

4. The bipolar plate of the electrolytic cell according to claim 3, wherein A plurality of the first radial channels (132) and the liquid channel holes (110) are provided within each set. The plurality of liquid channel holes (110) are arranged at intervals along the circumferential direction of the bipolar plate body (100). The plurality of first radial channels (132) are in one-to-one correspondence and communication with the plurality of liquid channel holes (110).

5. The bipolar plate of the electrolytic cell according to claim 1, characterized in that, The electrolytic cell bipolar plate further includes a plug (200). A second radial channel (131) is provided on the side face of the bipolar plate body (100) at a position corresponding to the liquid channel hole (110). The second radial channel (131) is located on the side of the liquid channel hole (110) away from the first radial channel (132), and one end is communicated with the liquid channel hole (110), and the other end is installed with the plug (200).

6. The bipolar plate of the electrolytic cell according to claim 5, characterized in that, The axis of the first radial channel (132) is collinear with the axis of the second radial channel (131).

7. The bipolar plate of the electrolytic cell according to claim 5, characterized in that, The length of the plug (200) is less than or equal to the distance from the side face of the bipolar plate body (100) to the side wall of the liquid channel hole (110).

8. The bipolar plate of the electrolytic cell according to claim 5, wherein The plug (200) is in interference fit with the second radial channel (131).

9. The bipolar plate of the electrolytic cell according to claim 5, characterized in that, A chamfer (210) is provided at the edge of the end face where the plug (200) extends into the second radial channel (131).

10. The bipolar plate of the electrolytic cell according to any one of claims 1-9, characterized in that, The bipolar plate body (100) includes a frame and a main bipolar plate. The frame and the main bipolar plate form the chamber (120); The first radial channels (132) and the liquid channel holes (110) are both provided on the frame.

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