Bipolar plate assembly and electrolytic cell

Abstract

This utility model provides a bipolar plate assembly and an electrolytic cell, relating to the field of electrolytic cell technology. The bipolar plate assembly includes an electrode frame, a bipolar plate, and a bending member. The bipolar plate is disposed within the electrode frame. The bending member includes a first connecting portion and a bending portion connected in sequence. The first connecting portion is connected to the bipolar plate, forming a flow-diverting channel between the bipolar plate, the bending portion, and the electrode frame. The top of the bending portion has multiple through holes, which are spaced apart along the extension direction of the bending portion. After the first connecting portion is connected to the bipolar plate, the bending portion is fastened between the bipolar plate and the electrode frame, forming a flow-diverting channel between the bipolar plate, the bending portion, and the electrode frame. Multiple through holes are provided at the top of the bending portion, allowing the electrolyte to flow through the through holes into the electrolysis chamber after flowing into the flow-diverting channel, thus achieving electrolyte diversion. By connecting the first connecting portion of the bending member to the bipolar plate, the bending member can be installed in the electrolysis chamber. The installation structure of the bending member is relatively simple and offers high ease of installation.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic cell technology, and in particular to a bipolar plate assembly and an electrolytic cell. Background Technology

[0002] The electrolyte inlet structure of the atmospheric pressure electrolyzer consists of a main pipe and multiple branch pipes. Multiple straight pipes are connected to the main pipe. The electrolyte enters from one end of the main pipe and then enters each electrolysis chamber through the branch pipes.

[0003] An electrolysis chamber consists of bipolar plates and an electrode frame. The bipolar plates are placed inside the electrode frame, and the thickness of the bipolar plates is less than the thickness of the electrode frame. After the bipolar plates and the electrode frame are combined, recessed spaces are formed on both sides of the bipolar plates. These recessed spaces are the electrolysis chambers.

[0004] After the electrolyte enters the electrolysis chamber through the branch pipe, a diversion pipe is installed inside the electrolysis chamber to distribute the electrolyte within the chamber. The diversion pipe is typically a circular pipe, which needs to be fixed to the bipolar plate using clamps or metal ferrules, and then welded to the bipolar plate. The installation structure of the diversion pipe is relatively complex, and the circular pipe is inconvenient to weld, making its installation less convenient. Utility Model Content

[0005] The purpose of this invention is to provide a bipolar plate assembly to solve the technical problem that the installation structure of the diversion pipe in the electrolysis chamber is complex and inconvenient in the prior art.

[0006] The bipolar plate assembly provided by this utility model includes a pole frame, a bipolar plate, and a bending component; The bipolar plate is disposed within the electrode frame; The bending component includes a first connecting part and a bending part connected in sequence; the first connecting part is connected to the bipolar plate, and a flow diversion channel is formed between the bipolar plate, the bending part, and the pole frame; The top of the bent portion is provided with multiple through holes, which are spaced apart along the extension direction of the bent portion.

[0007] Furthermore, the bipolar plate assembly also includes a second connecting portion; The bending portion includes a top plate and a side plate; the first connecting portion, the top plate, the side plate, and the second connecting portion are connected in sequence; The first connecting portion is fitted to the bipolar plate, and the second connecting portion is fitted to the pole frame; the first connecting portion is perpendicular to the top plate, the top plate is perpendicular to the side plate, and the side plate is perpendicular to the second connecting portion; the second connecting portion is fitted to the pole frame. The plurality of through holes are spaced apart on the top plate along the extending direction of the top plate.

[0008] Furthermore, the first connecting portion bends outward toward the outside of the diversion channel.

[0009] Furthermore, the second connecting portion bends toward the interior of the diversion channel.

[0010] Furthermore, the end face of the first connecting portion facing the bipolar plate is provided with a plurality of first protrusions, the plurality of first protrusions are spaced apart along the extending direction of the first connecting portion, and the plurality of first protrusions are welded to the bipolar plate.

[0011] Furthermore, along the flow direction of the liquid in the diversion channel, the spacing between adjacent through holes gradually increases.

[0012] Furthermore, the bent component is formed by stamping and bending a metal sheet.

[0013] Furthermore, the bipolar plate assembly also includes a liquid inlet pipe; one end of the liquid inlet pipe passes through the electrode frame and communicates with the diversion channel.

[0014] Furthermore, the bending element is provided on both sides of the bipolar plate.

[0015] The purpose of this invention is also to provide an electrolytic cell, including the bipolar plate assembly provided by this invention.

[0016] The bipolar plate assembly provided by this utility model includes an electrode frame, a bipolar plate, and a bending member. The bipolar plate is disposed within the electrode frame. The bending member includes a first connecting portion and a bending portion connected in sequence. The first connecting portion is connected to the bipolar plate, and a flow-diverting channel is formed between the bipolar plate, the bending portion, and the electrode frame. The top of the bending portion is provided with multiple through holes, which are spaced apart along the extending direction of the bending portion. The electrode frame is disposed on the outer edge of the bipolar plate. After the first connecting portion is connected to the bipolar plate, the bending portion is fastened between the bipolar plate and the electrode frame, thereby forming a flow-diverting channel between the bipolar plate, the bending portion, and the electrode frame. Multiple through holes are provided at the top of the bending portion. When electrolyte flows into the flow-diverting channel, the electrolyte can flow through the multiple through holes to the electrolysis chamber, thus achieving electrolyte diversion. The first connecting part of the bent component is connected to the bipolar plate, so that the bent component can be installed in the electrolysis chamber, thereby enabling the bent component to achieve the effect of electrolyte diversion. The installation structure of the bent component is relatively simple and does not require the use of clip rings or metal hoops for installation, making it highly convenient to install. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the bipolar plate assembly provided in this embodiment of the utility model; Figure 2 yes Figure 1 A magnified view of a portion of the image; Figure 3 This is a front view of the bipolar plate assembly provided in this embodiment of the utility model; Figure 4 yes Figure 3 A magnified view of a portion of the image; Figure 5 This is a partial cross-sectional view of the bipolar plate assembly provided in this embodiment of the utility model; Figure 6 This is a schematic diagram of the structure of the bent part of the bipolar plate assembly provided in this embodiment of the utility model; Figure 7 yes Figure 6 A magnified view of a portion of the image; Figure 8 This is a partial front view of the bent part of the bipolar plate assembly provided in this embodiment of the utility model; Figure 9 This is a partial top view of the bent part of the bipolar plate assembly provided in this embodiment of the utility model.

[0019] Icons: 1-Electrode frame; 2-Bipolar plate; 3-Bent component; 31-First connecting part; 32-Second connecting part; 33-Top plate; 34-Side plate; 35-Through hole; 36-First protrusion; 4-Diverting channel; 5-Liquid inlet pipe; 6-First electrolysis chamber; 7-Second electrolysis chamber. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] This utility model provides a bipolar plate assembly and an electrolytic cell. Several embodiments are given below to describe the bipolar plate assembly and electrolytic cell provided by this utility model in detail.

[0022] The bipolar plate assembly provided in this embodiment, such as Figures 1 to 9 As shown, it includes an electrode frame 1, a bipolar plate 2, and a bending member 3; the bipolar plate 2 is disposed inside the electrode frame 1; the bending member 3 includes a first connecting part 31 and a bending part connected in sequence; the first connecting part 31 is connected to the bipolar plate 2, and a diversion channel 4 is formed between the bipolar plate 2, the bending part, and the electrode frame 1; the top of the bending part is provided with multiple through holes 35, and the multiple through holes 35 are spaced apart along the extension direction of the bending part.

[0023] The direction of extension of the bend is as follows Figure 1 The direction indicated by the middle arrow ab.

[0024] The electrode frame 1 is located on the outer edge of the bipolar plate 2. After the first connecting part 31 is connected to the bipolar plate 2, the bent part is fastened between the bipolar plate 2 and the electrode frame 1, so that a diversion channel 4 is formed between the bipolar plate 2, the bent part and the electrode frame 1. At the top of the bent part, there are multiple through holes 35. When the electrolyte flows into the diversion channel 4, the electrolyte can flow to the electrolysis chamber through the multiple through holes 35, thereby realizing the diversion of the electrolyte.

[0025] The first connecting part 31 of the bent part 3 is connected to the bipolar plate 2, so that the bent part 3 can be installed in the electrolysis chamber, thereby enabling the bent part 3 to achieve the effect of electrolyte diversion. The installation structure of the bent part 3 is relatively simple and does not require the use of clip rings or metal hoops for installation, making it highly convenient to install.

[0026] The outer contour of the bend can be a right angle, an acute angle, an arc, or any other suitable shape.

[0027] Furthermore, the bipolar plate assembly also includes a second connecting portion 32; the bending portion includes a top plate 33 and a side plate 34; the first connecting portion 31, the top plate 33, the side plate 34 and the second connecting portion 32 are connected in sequence; the first connecting portion 31 is fitted to the bipolar plate 2, and the second connecting portion 32 is fitted to the pole frame 1; the first connecting portion 31 is perpendicular to the top plate 33, the top plate 33 is perpendicular to the side plate 34, and the side plate 34 is perpendicular to the second connecting portion 32; the second connecting portion 32 is fitted to the pole frame 1; a plurality of through holes 35 are spaced apart on the top plate 33 along the extending direction of the top plate 33.

[0028] The first connecting part 31 is fitted to the bipolar plate 2. The contact area between the first connecting part 31 and the bipolar plate 2 is large, which facilitates the operation of fixing the first connecting part 31 and the bipolar plate 2, so that the first connecting part 31 and the bipolar plate 2 are firmly fixed together.

[0029] In this embodiment, the first connecting part 31 is welded to the bipolar plate 2. Since the first connecting part 31 is in close contact with the bipolar plate 2, the welding is less difficult and the operation is more convenient.

[0030] The second connecting part 32 is fitted to the pole frame 1. The second connecting part 32 is located at the bottom of the bent part 3 and is fitted to the pole frame 1. It can support the bent part 3 and make the bent part 3 more stably set on the pole frame 1.

[0031] The first connecting part 31 is perpendicular to the top plate 33, the top plate 33 is perpendicular to the side plate 34, and the side plate 34 is perpendicular to the second connecting part 32, so that the cross-section of the diversion channel 4 is rectangular, and the rectangular diversion channel 4 is convenient for welding with the bipolar plate 2.

[0032] Furthermore, the first connecting part 31 bends outward toward the diversion channel 4.

[0033] The first connecting part 31 bends outward toward the diversion channel 4. The first connecting part 31 does not occupy the internal space of the diversion channel 4 and facilitates the connection between the first connecting part 31 and the bipolar plate 2.

[0034] Furthermore, the second connecting part 32 bends toward the inside of the diversion channel 4.

[0035] The second connection part 32 is located inside the diversion channel 4, and no longer occupies the space for diversion to reach the outside, which can help reduce the overall thickness of the bipolar plate assembly.

[0036] Furthermore, the end face of the first connecting portion 31 facing the bipolar plate 2 is provided with a plurality of first protrusions 36, the plurality of first protrusions 36 are spaced apart along the extending direction of the first connecting portion 31, and the plurality of first protrusions 36 are welded to the bipolar plate 2.

[0037] like Figure 8 As shown, multiple first protrusions 36 are welded to the bipolar plate 2, thereby welding the first connecting part 31 to the bipolar plate 2 together. The first protrusions 36 facilitate the welding operation between the first connecting part 31 and the bipolar plate 2.

[0038] Furthermore, along the direction of liquid inflow within the diversion channel 4, the spacing between adjacent through holes 35 gradually increases.

[0039] Along the extension direction of the diversion channel 4, the direction of liquid inflow within the diversion channel 4 is from the inlet end to the outlet end.

[0040] like Figure 9 As shown, along the inflow direction of the liquid in the diversion channel 4, the spacing between adjacent through holes 35 gradually increases, which can improve the uniformity of electrolyte flow.

[0041] The bent part 3 can be formed by welding the first connecting part 31, the bent part and the second connecting part 32 in sequence, or it can be a one-piece molded structure.

[0042] Furthermore, the bent part 3 is formed by stamping and bending a metal sheet.

[0043] The bent part 3 is formed by stamping and bending a metal sheet. The structure of the bent part 3 is relatively simple and easy to manufacture. It can be formed simply by stamping and bending a metal sheet.

[0044] Furthermore, the bipolar plate assembly also includes an inlet pipe 5; one end of the inlet pipe 5 passes through the electrode frame 1 and is connected to the diversion channel 4.

[0045] One end of the inlet pipe 5 passes through the electrode frame 1 and is connected to the diversion channel 4. The other end of the inlet pipe 5 is located outside the electrode frame 1. The electrolyte flows into the diversion channel 4 through the inlet pipe 5 and then into the electrolysis chamber through multiple through holes 35 on the bending member 3.

[0046] Furthermore, bending elements 3 are provided on both sides of the bipolar plate 2.

[0047] like Figure 5 As shown, one side of the bipolar plate 2 is a first electrolysis chamber 6, and the other side is a second electrolysis chamber 7. The first electrolysis chamber 6 is equipped with a bending element 3, through which electrolyte flows into the first electrolysis chamber 6 via multiple through holes 35. The second electrolysis chamber 7 is also equipped with a bending element 3, through which electrolyte flows into the second electrolysis chamber 7 via multiple through holes 35. The diversion channel 4 of the first electrolysis chamber 6 is connected to one inlet pipe 5, and the diversion channel 4 of the second electrolysis chamber 7 is connected to another inlet pipe 5.

[0048] The electrolytic cell provided in this embodiment includes a bipolar plate assembly. The electrode frame 1 is disposed on the outer edge of the bipolar plate 2. After the first connecting part 31 is connected to the bipolar plate 2, the bent part is fastened between the bipolar plate 2 and the electrode frame 1, forming a flow-diverting channel 4 between the bipolar plate 2, the bent part, and the electrode frame 1. Multiple through holes 35 are provided at the top of the bent part. When electrolyte flows into the flow-diverting channel 4, the electrolyte can flow through the multiple through holes 35 to the electrolysis chamber, thereby achieving electrolyte diversion. The first connecting part 31 of the bent component 3 is connected to the bipolar plate 2, allowing the bent component 3 to be installed in the electrolysis chamber, thus achieving electrolyte diversion. The installation structure of the bent component 3 is relatively simple, requiring no fasteners or metal clamps for installation, making installation highly convenient.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bipolar plate assembly, characterized by Includes pole frames, bipolar plates, and bending components; The bipolar plate is disposed within the electrode frame; The bending component includes a first connecting part and a bending part connected in sequence; the first connecting part is connected to the bipolar plate, and a flow diversion channel is formed between the bipolar plate, the bending part, and the pole frame; The top of the bent portion is provided with multiple through holes, which are spaced apart along the extension direction of the bent portion.

2. The bipolar plate assembly of claim 1, wherein The bipolar plate assembly also includes a second connecting portion; The bending portion includes a top plate and a side plate; the first connecting portion, the top plate, the side plate, and the second connecting portion are connected in sequence; The first connecting portion is fitted to the bipolar plate, and the second connecting portion is fitted to the pole frame; the first connecting portion is perpendicular to the top plate, the top plate is perpendicular to the side plate, and the side plate is perpendicular to the second connecting portion; the second connecting portion is fitted to the pole frame. The plurality of through holes are spaced apart on the top plate along the extending direction of the top plate.

3. The bipolar plate assembly according to claim 1, characterized in that, The first connecting part is bent toward the outside of the diversion channel.

4. The bipolar plate assembly according to claim 2, characterized in that, The second connecting part bends toward the inside of the diversion channel.

5. The bipolar plate assembly according to claim 1, characterized in that, The end face of the first connecting portion facing the bipolar plate is provided with a plurality of first protrusions, the plurality of first protrusions are spaced apart along the extending direction of the first connecting portion, and the plurality of first protrusions are welded to the bipolar plate.

6. The bipolar plate assembly according to claim 1, characterized in that, Along the direction of liquid inflow within the diversion channel, the spacing between adjacent through holes gradually increases.

7. The bipolar plate assembly according to claim 1, characterized in that, The bent part is formed by stamping and bending a metal sheet.

8. The bipolar plate assembly according to claim 1, characterized in that, The bipolar plate assembly also includes an inlet pipe; one end of the inlet pipe passes through the electrode frame and is connected to the diversion channel.

9. The bipolar plate assembly according to claim 1, characterized in that, The bending element is provided on both sides of the bipolar plate.

10. An electrolytic cell, characterized in that, Includes the bipolar plate assembly according to any one of claims 1-9.

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