CN116536687A - Electrolytic cell - Google Patents

Electrolytic cell Download PDF

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Publication number
CN116536687A
CN116536687A CN202310791053.9A CN202310791053A CN116536687A CN 116536687 A CN116536687 A CN 116536687A CN 202310791053 A CN202310791053 A CN 202310791053A CN 116536687 A CN116536687 A CN 116536687A
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CN
China
Prior art keywords
self
bipolar plate
retracting
expanding
cathode electrode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310791053.9A
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Chinese (zh)
Inventor
王杭州
秦军
赵苑竹
刘庆华
王乃燕
薛新超
李霞
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Petrochina Shenzhen New Energy Research Institute Co ltd
Petrochina Co Ltd
Original Assignee
Petrochina Shenzhen New Energy Research Institute Co ltd
Petrochina Co Ltd
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Priority to CN202310791053.9A priority Critical patent/CN116536687A/en
Publication of CN116536687A publication Critical patent/CN116536687A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/70—Assemblies comprising two or more cells
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
    • C25B9/17—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof
    • C25B9/19—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms
    • C25B9/21—Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof with diaphragms two or more diaphragms
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention relates to the technical field of hydrogen production by alkaline water, in particular to an electrolytic tank, which comprises a plurality of electrolytic units, wherein each electrolytic unit comprises a diaphragm, a cathode electrode, an anode electrode, a first bipolar plate and a second bipolar plate, the first bipolar plate and the second bipolar plate are respectively arranged on two sides of the diaphragm, the cathode electrode is arranged between the first bipolar plate and the diaphragm, the anode electrode is arranged between the second bipolar plate and the diaphragm, the first bipolar plate and the cathode electrode are connected through a first self-expansion assembly, the second bipolar plate and the anode electrode are connected through a second self-expansion assembly, the first self-expansion assembly adjusts the distance between the first bipolar plate and the cathode electrode, the second self-expansion assembly adjusts the distance between the second bipolar plate and the anode electrode, the cathode electrode or the anode electrode is prevented from falling off from the diaphragm, the electrolytic efficiency is improved, the gas yield is increased, and the electrolytic efficiency and the electrolytic stability are improved.

Description

Electrolytic cell
Technical Field
The invention relates to the technical field of hydrogen production by alkaline water, in particular to an electrolytic tank.
Background
The alkaline water electrolysis hydrogen production technology has wide application prospect, is one of the important technologies in the clean energy field, the core equipment of the alkaline water electrolysis hydrogen production technology is an electrolytic tank, the clamping force between an electrode and a diaphragm is important to the stability and efficiency of the electrolytic process of the electrolytic tank, a nipple electrode plate and a flat electrode plate are adopted at present, the nipple electrode plate presents a plurality of regular circular protruding-shaped protrusions on the surface, the protrusions are called nipples, the nipples can enable the electrode plate to be in close contact with the electrode, the clamping force is enhanced, the electrolytic efficiency and stability are improved, and meanwhile, the requirement of alkaline water electrolysis hydrogen production is met. However, during the long-term operation of the electrolytic cell, the nipple electrode is liable to shift or even fall off, resulting in problems such as reduced electrolysis efficiency and reduced gas yield. Therefore, there is a need for further improvements in the design of the nipple electrode plates that provide greater stability and durability to ensure reliability and sustainability of alkaline water electrolysis hydrogen production technology.
Thus, there is a need for an electrolytic cell having good tightness and stability.
Disclosure of Invention
The invention provides an electrolytic tank, which can adjust the distance between a first bipolar plate and a cathode electrode and the distance between a second bipolar plate and an anode electrode, avoid the falling off of the cathode electrode and the anode electrode respectively from a diaphragm, improve the electrolytic efficiency, increase the gas yield and improve the electrolytic efficiency and stability.
In view of this, the present invention proposes an electrolytic cell comprising: the electrolytic structure comprises a plurality of electrolytic units, each electrolytic unit comprises a diaphragm, a cathode electrode, an anode electrode, a first bipolar plate and a second bipolar plate, the first bipolar plate and the second bipolar plate are respectively arranged on two sides of the diaphragm, the cathode electrode is arranged between the first bipolar plate and the diaphragm, the anode electrode is arranged between the second bipolar plate and the diaphragm, the first bipolar plate and the cathode electrode are connected through a first self-expansion assembly, and the second bipolar plate and the anode electrode are connected through a second self-expansion assembly.
In some alternative embodiments, the first self-expanding assembly is an elastic expansion assembly, the first self-expanding assembly being capable of adjusting a distance between the first bipolar plate and the cathode electrode.
In some alternative embodiments, one end of the first self-expanding component is fixedly connected with the first bipolar plate, and the other end is abutted with the cathode electrode.
In some alternative embodiments, the first self-expanding component includes a plurality of first self-expanding members, and the plurality of first self-expanding members are arranged in a matrix.
In some alternative embodiments, the first self-expanding component comprises a plurality of first self-expanding components, the plurality of first self-expanding components enclose to form a layer of annular ring or a plurality of layers of annular rings, centers of the layers of annular rings are coincident, the radius of the i+1th layer of annular ring is larger than the radius of the i th layer of annular ring, and i is an integer greater than or equal to 1.
In some alternative embodiments, the first number of self-expanding members K is defined as an i-layer annular ring i And a number K of the first self-telescopic parts surrounding the ith layer +1 annular ring i+1 The data relationship between them is K i+1 =nK i I is an integer greater than or equal to 1, n is greater than 0, K i Taking positive integer, K i+1 Rounding up or downA number.
In some alternative embodiments, the value range of n is 1-3.
In some alternative embodiments, the range of values for n is 2.
In some alternative embodiments, the first number of self-expanding members K is defined as an i-layer annular ring i And the number K of the first self-telescopic parts surrounding the (i+1) th layer of annular ring i+1 The data relationship between them is K i+1 =mK i +m, i is an integer greater than or equal to 1, m is an integer greater than or equal to 1, K i Is a positive integer.
In some alternative embodiments, the value of m is 2.
In some alternative embodiments, the first self-expanding component comprises a first spring and a first spring guide sleeve, the first spring guide sleeve is arranged on the first bipolar plate, one end of the first spring is arranged on the first spring guide sleeve, and the other end of the first spring is abutted with the cathode electrode.
In some alternative embodiments, the second self-retracting assembly is a resilient self-retracting assembly, the second self-retracting assembly being capable of adjusting a distance between the second bipolar plate and the anode electrode.
In some alternative embodiments, one end of the second self-expanding assembly is fixedly connected to the second bipolar plate, and the other end abuts the anode electrode.
In some alternative embodiments, the second self-expanding assembly includes a plurality of second self-expanding members, the plurality of second self-expanding members being arranged in a matrix.
In some alternative embodiments, the second self-expanding component comprises a plurality of second self-expanding components, the plurality of second self-expanding components enclose to form at least one layer of annular ring or a plurality of layers of annular rings, centers of the layers of annular rings are coincident, a radius of a j+1th layer of annular ring is larger than a radius of a j th layer of annular ring, and j is an integer greater than or equal to 1.
In some alternative embodiments, a plurality of said second self-expanding members enclose a number K of j-th layer annular rings j And a plurality of said second self-extensionsNumber K of annular rings of j+1th layer surrounded by shrink members j+1 The data relationship between them is K j+1 =pK j J is an integer of 1 or more, and p is 0 or more.
In some alternative embodiments, the value range of p is 1-3.
In some alternative embodiments, the range of p is 2.
In some alternative embodiments, a plurality of said second self-expanding members enclose a number K of j-th layer annular rings j And a number K of the j+1th layer annular rings surrounded by the second self-telescopic components j+1 The data relationship between them is K j+1 =pK j +q, j is an integer of 1 or more, p is an integer of 1 or more, and q is an integer of 2 or more.
In some alternative embodiments, the second self-expanding component comprises a second spring and a second spring guide sleeve, the second spring guide sleeve is arranged on the second bipolar plate, one end of the second spring is arranged on the second spring guide sleeve, and the other end of the second spring is in butt joint with the anode electrode.
In some alternative embodiments, the first bipolar plate and the cathode electrode are connected by a plurality of first separators.
In some alternative embodiments, the second bipolar plate and the anode electrode are connected by a plurality of second separators.
Compared with the prior art, the invention has the following technical effects:
the invention provides an electrolytic tank, which comprises a plurality of electrolytic units, wherein each electrolytic unit comprises a diaphragm, a cathode electrode, an anode electrode, a first bipolar plate and a second bipolar plate, the first bipolar plate and the second bipolar plate are respectively arranged at two sides of the diaphragm, the cathode electrode is arranged between the first bipolar plate and the diaphragm, the anode electrode is arranged between the second bipolar plate and the diaphragm, the first bipolar plate and the cathode electrode are connected through a first self-expansion assembly, the second bipolar plate and the anode electrode are connected through a second self-expansion assembly, the first self-expansion assembly can adjust the distance between the first bipolar plate and the cathode electrode, the first self-expansion assembly can always push against the cathode electrode in the direction of the diaphragm, the second self-expansion assembly can adjust the distance between the second bipolar plate and the anode electrode, and the second self-expansion assembly can always push against the anode electrode in the direction of the diaphragm, so that the first self-expansion assembly and the second self-expansion assembly can apply force in the direction of the diaphragm, the first self-expansion assembly and the anode electrode are further prevented from falling off between the cathode electrode and the diaphragm respectively, the electrolytic efficiency is improved, the gas yield is improved, and the electrolytic efficiency and the stability is improved.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a schematic structural view of an electrolytic cell according to an embodiment of the present invention;
FIG. 2 shows a schematic structural view of an electrolytic cell according to an embodiment of the present invention;
FIG. 3 shows a schematic structural view of a first self-retracting assembly according to one embodiment of the present invention;
FIG. 4 shows a schematic structural view of a second self-retracting assembly according to one embodiment of the present invention;
FIG. 5 shows a schematic structural view of a first self-retracting member according to one embodiment of the present invention;
fig. 6 shows a schematic structural view of a second self-expanding component according to an embodiment of the present invention.
Wherein, the correspondence between the reference numerals and the component names in fig. 1 to 6 is:
1-a support body; 2-an electrolysis unit; 21-a separator; 22-cathode electrode; 23-an anode electrode; 24-a first bipolar plate; 25-a second bipolar plate; 3-a first self-retracting assembly; 31-a first self-retracting member; 311-a first spring; 312-a first spring guide sleeve; 4-a second self-retracting assembly; 41-a second self-retracting member; 411-a second spring; 412-a second spring guide; 5-a first separator; 6-a second separator.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
The alkaline water electrolysis hydrogen production technology has wide application prospect, is one of the important technologies in the clean energy field, the core equipment of the alkaline water electrolysis hydrogen production technology is an electrolytic tank, the clamping force between a cathode electrode or an anode electrode and a diaphragm is critical to the stability and efficiency of the electrolytic process of the electrolytic tank, a nipple electrode plate and a flat electrode plate are adopted at present, the nipple electrode plate presents a plurality of regular circular protruding-shaped protrusions on the surface, the protrusions are called nipples, the nipple can enable the electrode plate to be in close contact with the electrode, the clamping force is enhanced, the electrolytic efficiency and the electrolytic stability are improved, and meanwhile the requirements of alkaline water electrolysis hydrogen production are met. However, during the long-term operation of the electrolytic cell, the nipple electrode is liable to shift or even fall off, resulting in problems such as reduced electrolysis efficiency and reduced gas yield. Therefore, there is a need for further improvements in the design of the nipple electrode plates that provide greater stability and durability to ensure reliability and sustainability of alkaline water electrolysis hydrogen production technology.
Thus, there is a need for an electrolytic cell having good tightness and stability.
The invention provides an electrolytic tank, which can adjust the distance between an electrode plate and an electrode, avoid falling off between the electrode and a diaphragm 21, improve the electrolytic efficiency, increase the gas yield and improve the electrolytic efficiency and stability.
The invention provides an electrolytic cell comprising: the electrolytic structure comprises a plurality of electrolytic units 2, each electrolytic unit 2 comprises a diaphragm 21, a cathode electrode 22, an anode electrode 23, a first bipolar plate 24 and a second bipolar plate 25, the first bipolar plate 24 and the second bipolar plate 25 are respectively arranged on two sides of the diaphragm 21, the cathode electrode 22 is arranged between the first bipolar plate 24 and the diaphragm 21, the anode electrode 23 is arranged between the second bipolar plate 25 and the diaphragm 21, the first bipolar plate 24 and the cathode electrode 22 are connected through a first self-expansion assembly 3, and the second bipolar plate 25 and the anode electrode 23 are connected through a second self-expansion assembly 4.
Specifically, the electrolytic tank further includes a support body 1, the support body 1 is provided with an accommodation space, a plurality of electrolytic cells 2 are provided in the inside of the support body 1, the plurality of electrolytic cells 2 are sequentially arranged in the length direction of the support body 1, and each electrolytic cell 2 includes a diaphragm 21, a cathode electrode 22, an anode electrode 23, a first bipolar plate 24 and a second bipolar plate 25. The first self-expansion assembly 3 can adjust the distance between the first bipolar plate 24 and the cathode electrode 22, the first self-expansion assembly 3 can always jack the cathode electrode 22 towards the direction of the diaphragm 21, the second self-expansion assembly 4 can adjust the distance between the second bipolar plate 25 and the anode electrode 23, the second self-expansion assembly 4 can always jack the anode electrode 23 towards the direction of the diaphragm 21, the first self-expansion assembly 3 and the second self-expansion assembly 4 apply force towards the direction of the diaphragm 21, so that falling between the cathode electrode 22 and the anode electrode 23 and the diaphragm 21 respectively is further avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the first self-expanding assembly 3 is an elastic expansion assembly, and the first self-expanding assembly 3 is capable of adjusting the distance between the first bipolar plate 24 and the cathode electrode 22.
Specifically, the elastic telescopic component can adjust the distance between the first bipolar plate 24 and the cathode electrode 22, avoid falling off between the cathode electrode 22 and the diaphragm 21, improve the electrolysis efficiency, increase the gas yield and improve the electrolysis efficiency and stability.
In some alternative embodiments, one end of the first self-expanding assembly 3 is fixedly connected to the first bipolar plate 24, and the other end of the first self-expanding assembly 3 abuts against the cathode electrode 22.
Specifically, one end of the first self-expansion component 3 is welded with the first bipolar plate 24, the other end of the first self-expansion component 3 is in abutting connection with the cathode electrode 22, the first self-expansion component 3 can adjust the distance between the first bipolar plate 24 and the cathode electrode 22, the cathode electrode 22 can be always propped against the direction of the diaphragm 21 by the first self-expansion component 3, falling of the cathode electrode 22 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the first self-retracting assembly 3 comprises a plurality of first self-retracting members 31, the plurality of first self-retracting members 31 being arranged in a matrix.
Specifically, the first self-expansion components 31 are arranged in a matrix, when the individual first self-expansion components 31 are damaged, the integral adjusting effect of the first self-expansion component 3 is not affected, and the first self-expansion components 31 are arranged in a matrix, so that the distance between the first bipolar plate 24 and the cathode electrode 22 can be better adjusted, the first self-expansion component 3 can always tightly push the cathode electrode 22 towards the direction of the diaphragm 21, the falling between the cathode electrode 22 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the first self-expanding component 3 includes a plurality of first self-expanding members 31, where the plurality of first self-expanding members 31 enclose to form a single annular ring or a plurality of annular rings, the centers of the plurality of annular rings coincide, and the radius of the i+1th annular ring is greater than the radius of the i annular ring, and i is an integer greater than or equal to 1.
Specifically, the plurality of first self-telescopic components 31 enclose to form a layer of annular ring or a plurality of layers of annular rings, the centers of the plurality of layers of annular rings are overlapped, the radius of the (i+1) th layer of annular ring is larger than that of the (i) th layer of annular ring, when the individual first self-telescopic components 31 are damaged, the integral adjusting effect of the first self-telescopic components 3 is not affected, the plurality of first self-telescopic components 31 are arranged in a matrix, the distance between the first bipolar plate 24 and the cathode electrode 22 can be better adjusted, the falling between the cathode electrode 22 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and the stability are improved.
In some alternative embodiments, the number K of first self-expanding members 31 circumscribing the i-layer annular ring i And a first annular ring surrounding the (i+1) th layerNumber K of self-retracting parts 31 i+1 The data relationship between them is K i+1 =nK i I is an integer greater than or equal to 1, n is greater than 0, K i Taking positive integer, K i+1 Take an integer up or down.
In some alternative embodiments, the value range of n is 1-3.
In some alternative embodiments, n has a value of 2.
Specifically, when n is 2 and i is 1, the plurality of first self-expanding members 31 enclose a first number K of annular rings i And a number K of annular rings of the second layer surrounded by the plurality of first self-expanding members 31 i+1 The data relationship between them is K i+1 =2K i That is, the number K of annular rings of the second layer surrounded by the plurality of first self-expanding members 31 2 And a number K of annular rings of the second layer surrounded by the plurality of first self-expanding members 31 3 The data relationship between them is K 3 =2K 2 ，K 1 Is 5,K 2 Has a value of 10, K 3 The value of (2) is 22. The arrangement of the first self-telescopic component 31 can better adjust the distance between the first bipolar plate 24 and the cathode electrode 22, avoid falling off between the cathode electrode 22 and the diaphragm 21, improve the electrolysis efficiency, increase the gas yield and improve the electrolysis efficiency and stability. When the value of n is not an integer, K i+1 Take an integer up or down, e.g. when n has a value of 2.5, K 1 Is 5,K 2 Is a value of 13 or 12.
In some alternative embodiments, the number K of first self-expanding members 31 circumscribing the i-layer annular ring i And the number K of the first self-expanding members 31 surrounding the (i+1) th layer of the annular ring i+1 The data relationship between them is K i+1 =mK i +m, i is an integer greater than or equal to 1, m is an integer greater than or equal to 1, K i Is a positive integer.
Specifically, m is 2, a plurality of first self-expanding members 31 enclose to form at least 3 layers of annular rings, a plurality of first self-expanding members 31 enclose to form a number K of first layers of annular rings i And a number K of annular rings of the second layer surrounded by the plurality of first self-expanding members 31 i+1 The data relationship between them is K i+1 =2K i +2，K 1 Is 5,K 2 Has a value of 12, K 3 The value of (2) is 26. The arrangement of the first self-telescopic component 31 can better adjust the distance between the first bipolar plate 24 and the cathode electrode 22, avoid falling off between the cathode electrode 22 and the diaphragm 21, improve the electrolysis efficiency, increase the gas yield and improve the electrolysis efficiency and stability.
In some alternative embodiments, the first self-expanding component 31 includes a first spring 311 and a first spring guide sleeve 312, the first spring guide sleeve 312 is disposed on the first bipolar plate 24, one end of the first spring 311 is disposed on the first spring guide sleeve 312, and the other end of the first spring 311 abuts against the cathode electrode 22.
Specifically, the first spring 311 can extend and shorten in its own axial direction, so as to adjust the distance between the first bipolar plate 24 and the cathode electrode 22 at any time, avoid falling off between the cathode electrode 22 and the diaphragm 21, improve the electrolysis efficiency, increase the gas yield, and improve the electrolysis efficiency and stability.
In some alternative embodiments, the value of m is 2.
Specifically, m is 2, the plurality of first self-expanding members 31 enclose to form at least three layers of annular rings, the plurality of first self-expanding members 31 enclose to form the number K of the first layers of annular rings i And a number K of annular rings of the second layer surrounded by the plurality of first self-expanding members 31 i+1 The data relationship between them is K i+1 =2K i +2，K 1 Is 5,K 2 Has a value of 12, K 3 The value of (2) is 26. The distance between the first bipolar plate 24 and the cathode electrode 22 can be well adjusted through the arrangement of the first self-telescopic components 31, so that the first self-telescopic components 3 can always push against the cathode electrode 22 towards the direction of the diaphragm 21, falling off between the cathode electrode 22 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the second self-retracting assembly 4 is an elastic self-retracting assembly, and the second self-retracting assembly 4 is capable of adjusting the distance between the second bipolar plate 25 and the anode electrode 23.
Specifically, the elastic telescopic assembly can adjust the distance between the second bipolar plate 25 and the anode electrode 23, avoid falling off between the anode electrode 23 and the diaphragm 21, improve the electrolysis efficiency, increase the gas yield, and improve the electrolysis efficiency and stability.
In some alternative embodiments, one end of the second self-expanding assembly 4 is fixedly connected to the second bipolar plate 25, and the other end of the second self-expanding assembly 4 abuts the anode electrode 23.
Specifically, the plurality of second self-telescopic components 41 are arranged in a matrix, so that the distance between the second bipolar plate 25 and the anode electrode 23 can be well adjusted, the second self-telescopic component 4 can always tightly push the anode electrode 23 towards the direction of the diaphragm 21, falling-off between the anode electrode 23 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the second self-retracting assembly 4 includes a plurality of second self-retracting members 41, the plurality of second self-retracting members 41 being arranged in a matrix.
Specifically, when the individual second self-telescopic components 41 are damaged, the overall adjusting effect of the second self-telescopic components 4 is not affected, and the distances between the second bipolar plates 25 and the anode electrodes 23 can be better adjusted by arranging the second self-telescopic components 4 in a matrix, so that the second self-telescopic components 4 can always push against the anode electrodes 23 towards the direction of the diaphragm 21, the falling-off between the anode electrodes 23 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the second self-expanding assembly 4 includes a plurality of second self-expanding members 41, where the plurality of second self-expanding members 41 enclose at least one annular ring or a plurality of annular rings, the centers of the plurality of annular rings coincide, the radius of the j+1th annular ring is greater than the radius of the j th annular ring, and j is an integer greater than or equal to 1.
In some alternative embodiments, the number K of second self-expanding members 41 circumscribing the j-layer annular ring j And the number K of second self-expanding parts 41 surrounding the j+1th layer annular ring j+1 The data relationship between them is K j+1 =pK j An integer of j being greater than or equal to 1, p being greater than0，K j Taking positive integer, K j+1 Take an integer up or down.
Specifically, the second self-expanding component 4 includes a plurality of second self-expanding members 41, and the plurality of second self-expanding members 41 enclose at least three layers of annular rings, j is an integer greater than or equal to 1, and p is greater than 0. Optionally, p has a value of 2, and the plurality of second self-expanding members 41 enclose a number K of annular rings of the first layer j And a number K of second layer annular rings surrounded by a plurality of second self-expanding members 41 j+1 The data relationship between them is K 2 =2K 1 A number K of second layer annular rings surrounded by a plurality of second self-expanding parts 41 2 And a number K of annular rings of a third layer surrounded by a plurality of second self-expanding elements 41 3 The data relationship between them is K 3 =2K 2 ，K i Is 5,K 2 Has a value of 10, K 3 The value of (2) is 20. The arrangement of the second self-telescopic component 41 can better adjust the distance between the second bipolar plate 25 and the anode electrode 23, avoid falling off between the anode electrode 23 and the diaphragm 21, improve the electrolysis efficiency, increase the gas yield and improve the electrolysis efficiency and stability.
In some alternative embodiments, the value range of p is 1-3.
In some alternative embodiments, the value of p is 2.
In some alternative embodiments, the number K of second self-expanding members 41 circumscribing the j-layer annular ring j And the number K of second self-expanding parts 41 surrounding the j+1th layer annular ring j+1 The data relationship between them is K j+1 =pK i +q, an integer of j equal to or greater than 1, p equal to or greater than 1, q an integer of 2 or greater, K j Is a positive integer.
Specifically, p is 2, q is 2, and the plurality of second self-expanding members 41 enclose the number K of annular rings of the first layer j And a number K of second layer annular rings surrounded by a plurality of second self-expanding members 41 j+1 The data relationship between them is K j+1 =2K j +2, e.g. a plurality of second self-expanding elements 41 enclosing to form a three-layer annular ring, j having a value of 1, K 1 Is 5,K 2 Has a value of 12, K 3 The value of (2) is 26. The arrangement of the second self-telescopic component 41 can better adjust the distance between the second bipolar plate 25 and the anode electrode 23, so that the second self-telescopic component 4 can always push against the anode electrode 23 towards the direction of the diaphragm 21, the falling-off between the anode electrode 23 and the diaphragm 21 is avoided, the electrolysis efficiency is improved, the gas yield is increased, and the electrolysis efficiency and stability are improved.
In some alternative embodiments, the second self-expanding component 41 includes a second spring 411 and a second spring guide sleeve 412, the second spring guide sleeve 412 is disposed on the second bipolar plate 25, one end of the second spring 411 is disposed on the second spring guide sleeve 412, and the other end of the second spring 411 abuts against the anode electrode 23.
Specifically, the second spring 411 can extend and shorten in the axial direction of the second spring so as to adjust the distance between the second bipolar plate 25 and the anode electrode 23 at any time, so that the second self-telescopic assembly 4 can always push against the anode electrode 23 in the direction of the diaphragm 21, thereby avoiding falling off between the anode electrode 23 and the diaphragm 21, improving the electrolysis efficiency and the gas yield, and improving the electrolysis efficiency and the stability.
Specifically, by providing a plurality of springs between the second bipolar plate 25 and the anode electrode 23 and automatically fixing them inside the electrolytic cell, close contact between the anode electrode 23 and the separator 21 is achieved, thereby improving electrolytic efficiency and stability. In addition, the structural design can reduce maintenance cost and time and improve production efficiency and economic benefit in the field of alkaline water electrolysis hydrogen production on the premise of not influencing the electrolysis efficiency and stability of the electrolytic tank.
In some alternative embodiments, the first bipolar plate 24 and the cathode electrode 22 are connected by a plurality of first separators 5, and the second bipolar plate 25 and the anode electrode 23 are connected by a plurality of second separators 6.
Specifically, the first bipolar plate 24 and the cathode electrode 22 form an electrolysis chamber, alkaline electrolyte is arranged in the electrolysis chamber, and a plurality of first separators 5 are arranged between the first bipolar plate 24 and the cathode electrode 22, so that a circulation loop of the alkaline electrolyte in the electrolysis chamber is increased, the flowing time in the electrolysis chamber is prolonged, and the alkaline electrolyte can be fully electrolyzed. The second bipolar plate 25 and the anode electrode 23 form an electrolysis chamber, alkaline electrolyte is arranged in the electrolysis chamber, and a plurality of second separators 6 are arranged between the second bipolar plate 25 and the anode electrode 23, so that a circulation loop of the alkaline electrolyte in the electrolysis chamber is increased, the flowing time in the electrolysis chamber is prolonged, and the alkaline electrolyte can be fully electrolyzed.
In the present invention, the term "plurality" means at least two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (22)

1. An electrolytic cell, comprising: the electrolytic structure comprises a plurality of electrolytic units (2), each electrolytic unit (2) comprises a diaphragm (21), a cathode electrode (22), an anode electrode (23), a first bipolar plate (24) and a second bipolar plate (25), the first bipolar plate (24) and the second bipolar plate (25) are respectively arranged on two sides of the diaphragm (21), the cathode electrode (22) is arranged between the first bipolar plate (24) and the diaphragm (21), the anode electrode (23) is arranged between the second bipolar plate (25) and the diaphragm (21), the first bipolar plate (24) and the cathode electrode (22) are connected through a first self-telescopic assembly (3), and the second bipolar plate (25) and the anode electrode (23) are connected through a second self-telescopic assembly (4).
2. The electrolyzer of claim 1 characterized in that the first self-retracting assembly (3) is an elastically retracting assembly, the first self-retracting assembly (3) being able to adjust the distance between the first bipolar plate (24) and the cathode electrode (22).
3. The electrolyzer of claim 2 characterized in that one end of the first self-expanding assembly (3) is fixedly connected to the first bipolar plate (24) and the other end is in abutment with the cathode electrode (22).
4. A cell according to claim 3, wherein the first self-retracting assembly (3) comprises a plurality of first self-retracting members (31), the plurality of first self-retracting members (31) being arranged in a matrix.
5. A cell according to claim 3, wherein the first self-retracting assembly (3) comprises a plurality of first self-retracting members (31), the plurality of first self-retracting members (31) enclosing to form one or more layers of annular rings, the centers of the layers of annular rings being coincident, the radius of the i+1th layer of annular ring being greater than the radius of the i th layer of annular ring, i being an integer greater than or equal to 1.
6. An electrolyzer according to claim 5, characterized in that the number of the first self-telescoping members (31) of the ith annular ringK i And the number K of said first self-expanding members (31) of the (i+1) th layer annular ring i+1 The data relationship between them is K i+1 =nK i I is an integer greater than or equal to 1, n is greater than 0, K i Taking positive integer, K i+1 Take an integer up or down.
7. The electrolytic cell of claim 6 wherein n is in the range of 1 to 3.
8. The electrolyzer of claim 7 characterized in that n has a value of 2.
9. An electrolyzer according to claim 5, characterized in that the number K of the first self-telescoping members (31) of the ith annular ring i And the number K of the first self-expanding parts (31) of the (i+1) th layer annular ring i+1 The data relationship between them is K i+1 =mK i +m, i is an integer greater than or equal to 1, m is an integer greater than or equal to 1, K i Is a positive integer.
10. An electrolytic cell according to claim 9, wherein m has a value of 2.
11. The electrolytic cell according to any one of claims 2 to 9, wherein the first self-expanding member (31) comprises a first spring (311) and a first spring guide sleeve (312), the first spring guide sleeve (312) is arranged on the first bipolar plate (24), one end of the first spring (311) is arranged on the first spring guide sleeve (312), and the other end is abutted against the cathode electrode (22).
12. The electrolyzer of claim 1 characterized in that the second self-retracting assembly (4) is an elastic self-retracting assembly, the second self-retracting assembly (4) being capable of adjusting the distance between the second bipolar plate (25) and the anode electrode (23).
13. An electrolytic cell according to claim 12, wherein one end of the second self-retracting assembly (4) is fixedly connected to the second bipolar plate (25) and the other end abuts the anode electrode (23).
14. The electrolyzer of claim 13 characterized in that the second self-retracting assembly (4) comprises a plurality of second self-retracting members (41), a plurality of the second self-retracting members (41) being arranged in a matrix.
15. The electrolyzer of claim 13 characterized in that the second self-retracting assembly (4) comprises a plurality of second self-retracting members (41), a plurality of second self-retracting members (41) enclosing at least one layer of annular rings or a plurality of layers of annular rings, the centers of the layers of annular rings being coincident, the radius of the j+1th layer of annular rings being greater than the radius of the j th layer of annular rings, j being an integer greater than or equal to 1.
16. An electrolyzer according to claim 13, characterized in that the number K of the second self-expanding members (41) enclosing a j-layer annular ring j And the number K of the second self-expanding parts (41) surrounding the j+1th layer annular ring j+1 The data relationship between them is K j+1 =pK j An integer of j being greater than or equal to 1, p being greater than 0, K j Taking positive integer, K j+1 Take an integer up or down.
17. An electrolysis cell according to claim 16, wherein p is in the range 1 to 3.
18. An electrolysis cell according to claim 17, wherein p has a value of 2.
19. An electrolyzer according to claim 13, characterized in that the number K of the second self-expanding members (41) enclosing a j-layer annular ring j And enclose the j+1th layer of annular ringThe number K of the second self-telescopic parts (41) j+1 The data relationship between them is K j+1 =pK j +q, j is an integer greater than or equal to 1, p is an integer greater than or equal to 1, q is an integer greater than or equal to 2, K j Is a positive integer.
20. The electrolyzer of any one of claims 12 to 19 characterized in that the second self-expanding element (41) comprises a second spring (411) and a second spring guide sleeve (412), the second spring guide sleeve (412) is arranged on the second bipolar plate (25), one end of the second spring (411) is arranged on the second spring guide sleeve (412), and the other end is in abutment with the anode electrode (23).
21. The cell according to claim 1, characterized in that the first bipolar plate (24) and the cathode electrode (22) are connected by a plurality of first separators (5).
22. An electrolytic cell according to claim 2, characterized in that the second bipolar plate (25) and the anode electrode (23) are connected by a plurality of second separators (6).
CN202310791053.9A 2023-06-30 2023-06-30 Electrolytic cell Pending CN116536687A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2128980A1 (en) * 1993-07-30 1995-01-31 Linde Aktiengesellschaft Electrolytic cell system with filter press structure
JPH1081986A (en) * 1996-09-03 1998-03-31 Permelec Electrode Ltd Horizontal double-polarity electrolytic cell
JP2010150590A (en) * 2008-12-25 2010-07-08 Kurita Water Ind Ltd Electrode for water electrolysis apparatus
US20150203976A1 (en) * 2012-06-18 2015-07-23 Asahi Kasei Kabushiki Kaisha Bipolar alkaline water electrolysis unit and electrolytic cell
CN112969822A (en) * 2018-08-20 2021-06-15 泰利斯纳诺能量公司 Modular electrolysis unit for producing high-pressure and high-purity gaseous hydrogen
CN219260219U (en) * 2022-12-31 2023-06-27 上海莒纳新材料科技有限公司 Bipolar plate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2128980A1 (en) * 1993-07-30 1995-01-31 Linde Aktiengesellschaft Electrolytic cell system with filter press structure
JPH1081986A (en) * 1996-09-03 1998-03-31 Permelec Electrode Ltd Horizontal double-polarity electrolytic cell
JP2010150590A (en) * 2008-12-25 2010-07-08 Kurita Water Ind Ltd Electrode for water electrolysis apparatus
US20150203976A1 (en) * 2012-06-18 2015-07-23 Asahi Kasei Kabushiki Kaisha Bipolar alkaline water electrolysis unit and electrolytic cell
CN112969822A (en) * 2018-08-20 2021-06-15 泰利斯纳诺能量公司 Modular electrolysis unit for producing high-pressure and high-purity gaseous hydrogen
CN219260219U (en) * 2022-12-31 2023-06-27 上海莒纳新材料科技有限公司 Bipolar plate

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Application publication date: 20230804