CN218951513U - Bipolar plate and electrolytic cell - Google Patents
Bipolar plate and electrolytic cell Download PDFInfo
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- CN218951513U CN218951513U CN202222690592.7U CN202222690592U CN218951513U CN 218951513 U CN218951513 U CN 218951513U CN 202222690592 U CN202222690592 U CN 202222690592U CN 218951513 U CN218951513 U CN 218951513U
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- 239000003513 alkali Substances 0.000 claims abstract description 133
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005868 electrolysis reaction Methods 0.000 claims description 41
- 238000009826 distribution Methods 0.000 claims description 20
- 238000003825 pressing Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 210000004027 cell Anatomy 0.000 description 79
- 239000012670 alkaline solution Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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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
- 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
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/036—Bipolar electrodes
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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
- C25B15/00—Operating or servicing cells
- C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
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- 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 Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The present disclosure relates to a bipolar plate and an electrolytic cell, the bipolar plate having a first side and a second side disposed opposite to each other, the bipolar plate comprising a bipolar plate body and a first polar frame fixedly disposed at the periphery of the bipolar plate body, the bipolar plate body having a first chamber formed therein; the first side face is provided with a first alkali inlet through hole and a first alkali return through hole which are communicated with the first cavity respectively, and the first alkali return through hole is used for leading out alkali liquor in the first cavity and changing the flow direction of the alkali liquor. The bipolar plate provided by the disclosure can enable the flow direction of alkali liquor to be changed when the alkali liquor passes through the inside of the bipolar plate, so that when the bipolar plate is applied to an electrolytic tank, alkali liquor paths led into all the electrolytic cells can be respectively regulated and controlled, and the problem that part of the electrolytic cells are lack of liquid can be effectively avoided.
Description
Technical Field
The present disclosure relates to the field of water electrolysis technology, and in particular, to a bipolar plate and an electrolytic cell.
Background
In the field of alkaline water electrolysis, as the single electrolytic cell is bigger, the length of some large electrolytic cells can even reach more than five meters, wherein hundreds of electrode chambers can be included, however, as the size of the electrolytic cell is increased, new problems are brought, for example, when lye is distributed to each electrolytic cell from one side to the other side, partial liquid shortage can often occur in the electrolytic cell, on one hand, the uniformity of the whole electrolytic cell body temperature can be influenced, the electrolytic cell local temperature is overhigh, the electrolytic cell can be burnt even under severe conditions, and on the other hand, the electric energy consumption of the electrolytic cell is also easy to increase.
Disclosure of Invention
The purpose of the present disclosure is to provide a bipolar plate and an electrolytic cell, wherein the bipolar plate is designed to change the flow direction of alkaline solution when passing through the inside of the bipolar plate, so that when the bipolar plate is applied to the electrolytic cell, the path of alkaline solution introduced into each electrolytic cell can be regulated and controlled respectively, and thus, the problem of liquid shortage of part of the electrolytic cells can be effectively avoided.
In order to achieve the above object, the present disclosure provides a bipolar plate having oppositely disposed first and second sides, the bipolar plate including a bipolar plate body and a first electrode frame fixedly provided at an outer periphery of the bipolar plate body, the bipolar plate body having a first chamber formed therein; the first side face is provided with a first alkali inlet through hole and a first alkali return through hole which are communicated with the first cavity respectively, and the first alkali return through hole is used for leading out alkali liquor in the first cavity and changing the flow direction of the alkali liquor.
Optionally, the first alkali inlet through hole and the first alkali return through hole are both located at the lower part of the first polar frame.
Optionally, a first through groove is formed in the first side face of the first polar frame along the radial direction, and the first return alkali solution through hole is used for being communicated with an electrolysis cell where the first side face is located through the first through groove.
Optionally, on the second side, the lower part of the first polar frame is respectively provided with an alkali liquor distribution blind hole along the axial direction and a second through groove along the radial direction, and the alkali liquor distribution blind hole is used for communicating with an electrolysis cell where the second side is located through the second through groove.
On the basis of the technical scheme, the present disclosure further provides an electrolytic cell, which comprises an end pressing plate, a positive plate and a negative plate, wherein the positive plate and the negative plate are oppositely arranged, the end pressing plate is arranged on the outer side of the negative plate, the electrolytic cell further comprises a plurality of bipolar plates, the bipolar plates are arranged between the positive plate and the negative plate in parallel at intervals, and the first side surfaces of the bipolar plates are all arranged towards the negative plate; the first alkali inlet through holes in any two bipolar plates are axially arranged on different straight lines so as to form multi-section alkali liquid inflow channels with different lengths in the electrolytic tank; the first return alkali liquid through holes in any two bipolar plates are axially arranged on the same straight line or mutually parallel straight lines; and a plurality of alkali liquor inlets corresponding to the first alkali inlet through holes in the bipolar plates are formed in the end pressing plate.
Optionally, a plurality of bipolar plates are arranged in the electrolytic tank at equal intervals along the axial direction so as to form alkali liquor distribution channels with equal lengths.
Optionally, the electrolytic cell has a positive plate and a negative plate, the bipolar plate being disposed between one of the positive and negative plates.
Optionally, the positive plate includes the positive plate body and sets firmly the second pole frame of positive plate body periphery, be formed with the second cavity in the positive plate body, the second pole frame with be provided with respectively on the side opposite to the negative plate with the second alkali inlet through hole and the second of second cavity intercommunication return the lye through hole, the lye through hole is returned to the second is used for drawing forth the lye in the second cavity to make the flow direction of lye change.
Optionally, the electrolytic cell includes one positive plate and two negative plates, the positive plate being configured as an intermediate plate disposed between the two negative plates and having first and second oppositely disposed positive faces, wherein the first positive face is opposite one of the negative plates and the second positive face is opposite the other negative plate.
Optionally, the middle polar plate comprises a middle polar plate body and a middle polar frame fixedly arranged at the periphery of the middle polar plate body, a third chamber and a fourth chamber are formed in the middle polar plate body side by side, a third alkali inlet through hole and a third alkali return through hole which are communicated with the third chamber are respectively formed in the middle polar plate body, and the first positive polar surface is provided with a third alkali inlet through hole and a third alkali return through hole which are communicated with the third chamber; a fourth alkali inlet through hole and a fourth alkali return through hole which are communicated with the fourth cavity are respectively arranged on the second positive electrode surface, wherein the third alkali return through hole is used for leading out alkali liquor in the third cavity and changing the flow direction of the alkali liquor; the fourth lye return through hole is used for leading out lye in the fourth cavity and changing the flow direction of the lye.
Optionally, the alkali liquor inlets are correspondingly communicated with the alkali liquor circulation pumps one by one to form a plurality of alkali liquor input channels, and each alkali liquor input channel is provided with a control valve.
Optionally, a flowmeter is further arranged on each alkali liquor input channel.
Through the technical scheme, in the bipolar plate provided by the disclosure, the first cavity is formed in the bipolar plate body of the bipolar plate, and the first alkali inlet through hole and the first alkali return through hole which are communicated with the first cavity are formed in the first side face of the first polar frame, so that alkali liquor can flow to change after flowing through the bipolar plate, and then the alkali liquor is introduced into the corresponding electrolysis cells, in this way, the number of alkali liquor input channels and alkali liquor distribution channels can be increased through the bipolar plate when the electrolysis cells are designed, and because the number of the alkali liquor input channels and the alkali liquor distribution channels is increased, mutual interference can not be generated between alkali liquor conveying paths in each electrolysis cell, and the alkali liquor can be independently controlled through the mutually independent alkali liquor input channels and alkali liquor distribution channels, so that even if the size of the electrolysis cells is increased, the alkali liquor can be uniformly distributed into each electrolysis cell, the temperature of each electrolysis cell is uniform, the service life is prolonged, and the electric energy consumption is greatly reduced.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
FIG. 1 is a schematic view of an electrolytic cell provided according to a first embodiment of the present disclosure, wherein an end pressure plate is omitted;
fig. 2 is a schematic structural view of a bipolar plate in an electrolytic cell provided according to a first embodiment of the present disclosure;
FIG. 3 is another schematic structural view of a bipolar plate in an electrolytic cell provided in accordance with a first embodiment of the present disclosure;
FIG. 4 is a schematic view of yet another construction of bipolar plates in an electrolytic cell provided in accordance with a first embodiment of the present disclosure, wherein a portion of the construction is omitted to show the first chamber;
fig. 5 is a schematic view of the structure of a positive plate in an electrolytic cell provided according to a first embodiment of the present disclosure;
FIG. 6 is another schematic view of the structure of the positive plate in the electrolytic cell provided according to the first embodiment of the present disclosure, wherein a part of the structure is omitted to show the second chamber;
fig. 7 is a schematic structural view of an electrolytic cell provided according to a second embodiment of the present disclosure, in which only one bipolar plate is illustrated between each negative plate and the intermediate plate for simplicity of construction, and an end press plate is also omitted;
FIG. 8 is a schematic view of the structure of an intermediate plate in an electrolytic cell provided in accordance with a second embodiment of the present disclosure;
FIG. 9 is another schematic structural view of an intermediate plate in an electrolytic cell provided in accordance with a second embodiment of the present disclosure;
fig. 10 is a schematic view of still another structure of an intermediate plate in an electrolytic cell according to a second embodiment of the present disclosure, wherein a part of the structure is omitted to show the third and fourth chambers.
Description of the reference numerals
1-a bipolar plate; 11-a first side; 12-a second side; 13-a bipolar plate body; 131-a first chamber; 14-a first pole frame; 141-a first alkali inlet through hole; 142-first return lye through hole; 143-a first through groove; 144-second through slots; 145-lye dispensing blind holes; 2-a negative plate; 3-positive plate; 31-a positive plate body; 311-a second chamber; 32-a second pole frame; 321-a second alkali inlet through hole; 322-second return lye through hole; 33-an intermediate plate; 331-a first positive face; 332-a second positive face; 333-intermediate plate body; 3331-third chamber; 3332-fourth chamber; 334-middle pole frame; 3341-third alkali inlet through hole; 3342-third return lye through hole; 3343-fourth alkali inlet through hole; 3344-fourth fold return lye through hole; 4-electrolysis cell.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In the present disclosure, unless otherwise stated, terms such as "upper and lower" refer to upper and lower in the direction of gravity in actual use. "inner and outer" means "inner and outer" with respect to the contour of the corresponding component itself, unless otherwise explained, for example, the explanation of "outer" hereinafter. Furthermore, the terms "first," "second," "third," "fourth," and the like in accordance with the present disclosure are used for distinguishing one element from another and not necessarily for order or importance. Furthermore, in the following description, when referring to the drawings, the same reference numerals in different drawings denote the same or similar elements unless otherwise explained. The foregoing definitions are provided for the purpose of illustrating and explaining the present disclosure and should not be construed as limiting the present disclosure.
The present disclosure provides a bipolar plate 1, referring to fig. 2 to 4, the bipolar plate 1 has a first side 11 and a second side 12 disposed opposite to each other, the bipolar plate 1 includes a bipolar plate body 13 and a first electrode frame 14 fixed on the outer periphery of the bipolar plate body 13, and a first chamber 131 is formed inside the bipolar plate body 13; on the first side 11, a first alkali inlet through hole 141 and a first alkali return through hole 142 which are communicated with the first chamber 131 are respectively arranged on the first polar frame 14, and the first alkali return through hole 142 is used for leading out alkali liquor in the first chamber 131 and changing the flow direction of the alkali liquor.
According to the technical scheme, in the bipolar plate 1 provided by the disclosure, the first cavity 131 is formed in the bipolar plate body 13 of the bipolar plate 1, and the first alkali inlet through hole 141 and the first alkali return through hole 142 which are communicated with the first cavity 131 are formed in the first side 11 of the first polar frame 14, so that alkali liquor can flow to change after flowing through the bipolar plate 1, and then is introduced into the corresponding electrolysis cells 4, so that the number of alkali liquor input channels and alkali liquor distribution channels can be increased by adding the bipolar plate 1 when the electrolysis cells are designed, and because the number of the alkali liquor input channels and the alkali liquor distribution channels is increased, mutual interference can not be generated between alkali liquor conveying paths in each electrolysis cell 4, and the alkali liquor can be independently controlled through the alkali liquor input channels and the alkali liquor distribution channels, so that even if the size of the electrolysis cells is increased, the temperature of each electrolysis cell is uniform, the service life of the electrolysis cell is prolonged, and the electric energy consumption is greatly reduced.
In the specific embodiments provided in the present disclosure, the first alkali inlet through hole 141 and the first return alkali solution through hole 142 may be provided on the first pole frame 14 in any suitable manner. Alternatively, referring to FIG. 2, in order to facilitate the distribution of the lye from the lower part into the electrolysis cell 4, the first lye inlet through hole 141 and the first return lye through hole 142 are both located at the lower part of the first pole frame 14.
In the specific embodiment provided in the disclosure, referring to fig. 2, in order to facilitate smooth conveyance of the lye into the electrolysis cell 4 where the first side 11 is located after the flow direction of the lye is changed through the first chamber 131, a first through slot 143 may be provided in the first side 11 by the first pole frame 14 along the radial direction, and the first lye through hole 142 is used for communicating with the electrolysis cell 4 where the first side 11 is located through the first through slot 143.
In the specific embodiment provided in the disclosure, referring to fig. 3, in order to facilitate smooth transportation of the lye in the cavity of the bipolar plate 1 or the positive plate 3 adjacent to the second side 12 into the electrolysis cell 4 where the second side 12 is located after the flow direction of the lye is changed in the cavity, the second side 12 may be provided with a lye distribution blind hole 145 along the axial direction and a second through groove 144 along the radial direction at the lower portion of the first pole frame 14, where the lye distribution blind hole 145 is used for communicating with the electrolysis cell 4 where the second side 12 is located through the second through groove 144.
In the above technical solution, since the lye input channel and the lye distribution channel of each bipolar plate 1 are independently controlled, no interference is generated between them, so that the first folded lye through hole 142 of the first side 11 and the lye distribution blind hole 145 of the second side 12 of each bipolar plate 1 are not communicated with each other, the lye in the electrolysis cell 4 on the side of the first side 11 is from the first chamber 131 of the bipolar plate 1 itself, and the lye in the electrolysis cell 4 on the side of the second side 12 is from the first chamber 131 of the bipolar plate 1 adjacent to the second side 12 of the bipolar plate 1 or the second chamber 311 of the positive plate 3 adjacent to the second side 12 of the bipolar plate 1. Among them, the related contents about the positive electrode plate 3 will be described in detail in the following.
On the basis of the technical scheme, the disclosure further provides an electrolytic cell, and referring to fig. 1 and 7, the electrolytic cell comprises an end pressing plate, a positive plate 3 and a negative plate 2 which are oppositely arranged, the end pressing plate is arranged on the outer side of the negative plate 2, the electrolytic cell further comprises a plurality of bipolar plates 1, the bipolar plates 1 are arranged between the positive plate 3 and the negative plate 2 at intervals side by side, and first side surfaces 11 of the bipolar plates 1 are all arranged towards the negative plate 2; the first alkali inlet through holes 141 in any two bipolar plates 1 are all arranged on different straight lines along the axial direction so as to form multi-section alkali liquid inflow channels with different lengths in the electrolytic bath; the first return alkali solution through holes 142 in any two bipolar plates 1 are axially arranged on the same straight line or mutually parallel straight lines; the end pressing plate is provided with a plurality of alkali liquor inlets corresponding to the first alkali inlet through holes 141 in the bipolar plates 1.
Through the technical scheme, in the electrolytic tank provided by the disclosure, through adding a plurality of bipolar plates 1 arranged side by side at intervals between the positive plate 3 and the negative plate 2, and enabling the first side 11 of the bipolar plates 1 to face the negative plate 2, the first alkali inlet through holes 141 in any two bipolar plates 1 are all arranged on different straight lines along the axial direction, and a plurality of alkali liquor inlets corresponding to the first alkali inlet through holes 141 in the bipolar plates 1 are formed on the end pressing plate, a plurality of independent alkali liquor channels which can be led into corresponding electrolytic cells 4 from the end pressing plate are formed, so that when the bipolar plates 1, the positive plate 3 and the negative plate 2 are mutually matched and applied to the electrolytic tank, the alkali liquor channels which are led into the electrolytic cells 4 are mutually independent, so that mutual influence can not be generated between the alkali liquor which is led into the electrolytic cells 4, and the alkali liquor can be distributed into the electrolytic cells 4 through the respective alkali liquor channels, and therefore, the problem of partial electrolytic cells 4 lacking in the electrolytic cells can be effectively improved, the problem of electrolyte loss in the electrolytic cells 4 can be evenly distributed into the electrolytic cells 4, and the situation that the temperature of the electrolytic cells is greatly reduced is avoided, and the situation that the temperature of the electrolytic cell is not completely lost is greatly reduced is avoided. In addition, the first return lye through holes 142 of any two bipolar plates 1 are all arranged on the same straight line along the axis, so that the production and the processing can be facilitated, and lye in each lye distribution channel can have the same potential energy, thereby being more beneficial to the uniform distribution of lye in each electrolysis cell 4.
It should be noted that, in the electrolytic cell in the above technical solution, besides the bipolar plate 1 described in the above content of the disclosure, the common bipolar plate 1 in which the first chamber 131 is not provided in the bipolar plate body 13 may also be included, and in this case, the bipolar plate 1 in the disclosure may be provided at a corresponding position as required.
It should also be noted that the "outer side" mentioned in the above process is the outer side with respect to the space formed between the positive electrode plate 3 and the negative electrode plate 2, that is, the outer side of the positive electrode plate 3 refers to the side of the positive electrode plate 3 facing away from the negative electrode plate 2, and the outer side of the negative electrode plate 2 refers to the side of the negative electrode plate 2 facing away from the positive electrode plate 3.
In the embodiment provided in the present disclosure, referring to fig. 1 and 7, a plurality of bipolar plates 1 are disposed in an electrolysis cell at equal intervals in an axial direction to form an equal length lye distribution channel, so that the lye in each lye input channel can enter each electrolysis cell 4 with the same length lye distribution channel after passing through the first chamber 131 of each bipolar plate 1, so as to further facilitate uniform distribution of the lye.
In the specific embodiments provided in the present disclosure, the electrolytic cell may have at least two possible embodiments:
in a first possible embodiment, with reference to fig. 1, the cell has one positive plate 3 and one negative plate 2, the bipolar plate 1 being arranged between one positive plate 3 and one negative plate 2, by which arrangement all lye enters the bipolar plate 1 or the positive plate 3 through the lye inlet in the end plate arranged on one side of the negative plate 2 and is returned through their respective chamber generating paths. In this embodiment, the end press plate is also provided on the outer side of the positive electrode plate 3, and the end press plate provided on the outer side of the positive electrode plate 3 may be a conventional end press plate in the prior art, unlike the end press plate provided on the side of the negative electrode plate 2.
In the first possible embodiment, referring to fig. 5 and 6, the positive electrode plate 3 includes a positive electrode plate body 31 and a second electrode frame 32 fixedly arranged at the outer periphery of the positive electrode plate body 31, a second chamber 311 is formed in the positive electrode plate body 31, a second alkali inlet through hole 321 and a second alkali return through hole 322 which are respectively arranged on the opposite sides of the second electrode frame 32 to the negative electrode plate 2 and are communicated with the second chamber 311, and the second alkali return through hole 322 is used for leading out alkali liquor in the second chamber 311 and changing the flow direction of the alkali liquor.
In a second possible embodiment, referring to fig. 7, the electrolytic cell comprises one positive electrode plate 3 and two negative electrode plates 2, the positive electrode plate 3 is configured as a middle electrode plate 33, the middle electrode plate 33 is arranged between the two negative electrode plates 2 and has a first positive electrode surface 331 and a second positive electrode surface 332 which are oppositely arranged, wherein the first positive electrode surface 331 is opposite to one negative electrode plate 2, and the second positive electrode surface 332 is opposite to the other negative electrode plate 2, and by such arrangement, the middle electrode plate 33 and the two negative electrode plates 2 can simultaneously form one electrolytic cell together. In this embodiment, compared to the first embodiment, all the lye enters from the end pressing plates on the same side, and the lye is respectively introduced into the corresponding electrolysis cells 4 through the lye inlets on the two end pressing plates on the outer sides of the two negative plates 2, so that the second embodiment can accelerate the lye entering into the respective electrolysis cells 4 when the size of the electrolysis cell is large and the number of the electrolysis cells 4 is large.
In the second possible embodiment, referring to fig. 8 to 10, the middle electrode plate 33 includes a middle electrode plate body 333 and a middle electrode frame 334 fixed on the outer periphery of the middle electrode plate body 333, a third chamber 3331 and a fourth chamber 3332 are formed in the middle electrode plate body 333 side by side, a third alkali inlet through hole 3341 and a third alkali return through hole 3342 which are communicated with the third chamber 3331 are respectively provided on the middle electrode frame 334 on the first positive electrode surface 331; a fourth alkali inlet through hole 3343 and a fourth alkali return through hole 3344 which are communicated with the fourth chamber 3332 are respectively arranged on the second positive electrode surface 332, wherein the third alkali return through hole 3342 is used for leading out alkali liquor in the third chamber 3331 and changing the flow direction of the alkali liquor; the fourth lye return through hole 3344 is used for leading out lye in the fourth cavity 3332 and changing the flow direction of the lye, and through the arrangement, the two cavities of the middle polar plate 33 can be isolated from each other and not interfered with each other, so that respective electrolytic environments are respectively formed at two sides of the middle polar plate 33.
In the specific embodiment provided by the disclosure, in order to further independently control the lye introduced into each electrolysis cell 4, a plurality of lye inlets and a plurality of lye circulation pumps are communicated in a one-to-one correspondence manner to form a plurality of lye input channels, and each lye input channel is provided with a control valve, so that the lye on the path can be regulated and controlled through the control valve. The control valve can be an automatic regulating valve or a manual valve, and the opening of the valve can be set according to the flow requirement, so that the flow of the alkaline solution in each alkaline solution input channel is controlled to be the same.
In the specific embodiment provided by the disclosure, in order to facilitate the observation of the flow rate of the lye on each path, a flowmeter may be provided on each lye input channel.
In use, referring to fig. 1 to 6, the flow path of the alkaline solution is roughly divided into two paths, wherein the first path is turned back inside the bipolar plate 1 and the second path is turned back inside the positive electrode plate 3. Specifically, in the first path, alkali liquor is introduced into the first chamber 131 of the bipolar plate 1 from the alkali liquor inlet on the end pressing plate at one side of the negative plate 2, then passes through the first chamber 131, turns back and enters the corresponding electrolysis cell 4 through the first turn-back alkali liquor through hole 142, and generates hydrogen or oxygen in the electrolysis cell 4, and then the hydrogen mixed with the alkali liquor and the oxygen mixed with the alkali liquor are discharged from the gas-liquid mixing outlet on the end pressing plate at one side of the negative plate 2 through respective gas-liquid mixing channels; in the second path, the alkali liquor is introduced into the second chamber 311 of the positive plate 3 from the alkali liquor inlet on the end pressing plate at one side of the negative plate 2, then passes through the second chamber 311, turns back and enters the corresponding electrolysis chamber 4 through the second turn-back alkali liquor through hole 322, the electrolysis reaction occurs in the electrolysis chamber 4, hydrogen or oxygen is generated, and then the hydrogen mixed with the alkali liquor and the oxygen mixed with the alkali liquor are discharged from the gas-liquid mixing outlet on the end pressing plate at one side of the negative plate 2 through the respective gas-liquid mixing channels.
In the above process, if the electrolytic cell shown in fig. 7 is used, in the second path, the alkaline solution is introduced into the third chamber 3331 or the fourth chamber 3332 of the intermediate plate 33, and is turned back after passing through the corresponding chamber.
In all the embodiments disclosed above, the through hole may be a circular hole, an elliptical hole, or any other suitable hollow shape, which is not limited in this disclosure, and may be flexibly selected according to practical situations.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (12)
1. A bipolar plate, which is characterized by comprising a bipolar plate body and a first polar frame fixedly arranged at the periphery of the bipolar plate body, wherein the bipolar plate is provided with a first side surface and a second side surface which are oppositely arranged, and a first chamber is formed inside the bipolar plate body; the first side face is provided with a first alkali inlet through hole and a first alkali return through hole which are communicated with the first cavity respectively, and the first alkali return through hole is used for leading out alkali liquor in the first cavity and changing the flow direction of the alkali liquor.
2. The bipolar plate of claim 1 wherein the first alkali inlet through hole and the first return alkali solution through hole are both located in a lower portion of the first polar frame.
3. The bipolar plate of claim 1 wherein, on the first side, the first electrode frame is radially provided with a first through slot through which the first return-liquid through-hole is used for communication with an electrolysis cell in which the first side is located.
4. The bipolar plate of claim 1, wherein the lower portion of the first pole frame is provided with an axial lye distribution blind hole and a radial second through slot, respectively, in the second side face, the lye distribution blind hole being adapted to communicate with an electrolysis cell in which the second side face is located via the second through slot.
5. An electrolytic cell comprising an end pressure plate and oppositely disposed positive and negative electrode plates, the end pressure plate being disposed outboard of the negative electrode plates, characterized by a plurality of bipolar plates according to any one of claims 1 to 4, a plurality of the bipolar plates being disposed side-by-side in a spaced relationship between the positive and negative electrode plates, and the first sides of the plurality of bipolar plates being disposed toward the negative electrode plates; the first alkali inlet through holes in any two bipolar plates are axially arranged on different straight lines so as to form multi-section alkali liquid inflow channels with different lengths in the electrolytic tank; the first return alkali liquid through holes in any two bipolar plates are axially arranged on the same straight line or mutually parallel straight lines; and a plurality of alkali liquor inlets corresponding to the first alkali inlet through holes in the bipolar plates are formed in the end pressing plate.
6. The electrolyzer of claim 5 characterized in that a plurality of said bipolar plates are disposed axially equally spaced in said electrolyzer to form equal length lye distribution channels.
7. The electrolytic cell of claim 5 wherein the cell has a positive plate and a negative plate, the bipolar plate being disposed between one of the positive and negative plates.
8. The electrolytic cell according to claim 7, wherein the positive electrode plate comprises a positive electrode plate body and a second electrode frame fixedly arranged on the periphery of the positive electrode plate body, a second cavity is formed in the positive electrode plate body, a second alkali inlet through hole and a second alkali return through hole which are communicated with the second cavity are respectively formed in the side face, opposite to the negative electrode plate, of the second electrode frame, and the second alkali return through hole is used for leading out alkali liquor in the second cavity and changing the flow direction of the alkali liquor.
9. The electrolytic cell of claim 5 comprising one positive plate and two negative plates, the positive plate configured as a middle plate disposed between the two negative plates and having oppositely disposed first and second positive faces, wherein the first positive face is opposite one of the negative plates and the second positive face is opposite the other negative plate.
10. The electrolytic cell according to claim 9, wherein the middle polar plate comprises a middle polar plate body and a middle polar frame fixedly arranged at the periphery of the middle polar plate body, a third chamber and a fourth chamber are formed in the middle polar plate body side by side, a third alkali inlet through hole and a third alkali return through hole which are communicated with the third chamber are respectively formed on the middle polar frame on the first positive polar surface; a fourth alkali inlet through hole and a fourth alkali return through hole which are communicated with the fourth cavity are respectively arranged on the second positive electrode surface, wherein the third alkali return through hole is used for leading out alkali liquor in the third cavity and changing the flow direction of the alkali liquor; the fourth lye return through hole is used for leading out lye in the fourth cavity and changing the flow direction of the lye.
11. An electrolysis cell according to any one of claims 5 to 10, wherein a plurality of the lye inlets communicate in one-to-one correspondence with a plurality of lye circulation pumps to form a plurality of lye input channels, each of the lye input channels being provided with a control valve.
12. An electrolysis cell according to claim 11, wherein a flow meter is also provided on each of the lye input channels.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222690592.7U CN218951513U (en) | 2022-10-12 | 2022-10-12 | Bipolar plate and electrolytic cell |
| PCT/CN2023/122661 WO2024078362A1 (en) | 2022-10-12 | 2023-09-28 | Bipolar plate and electrolytic cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222690592.7U CN218951513U (en) | 2022-10-12 | 2022-10-12 | Bipolar plate and electrolytic cell |
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| CN202222690592.7U Active CN218951513U (en) | 2022-10-12 | 2022-10-12 | Bipolar plate and electrolytic cell |
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| CN (1) | CN218951513U (en) |
| WO (1) | WO2024078362A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024078362A1 (en) * | 2022-10-12 | 2024-04-18 | 无锡隆基氢能科技有限公司 | Bipolar plate and electrolytic cell |
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| CH672142A5 (en) * | 1985-07-17 | 1989-10-31 | Metkon Sa | |
| CN212669809U (en) * | 2020-04-22 | 2021-03-09 | 考克利尔竞立(苏州)氢能科技有限公司 | Novel runner flow field structure water electrolysis tank |
| CN212404304U (en) * | 2020-05-21 | 2021-01-26 | 考克利尔竞立(苏州)氢能科技有限公司 | Electrolyte distributing and converging structure of water electrolyzer |
| DK181191B1 (en) * | 2021-01-22 | 2023-04-13 | Stiesdal Hydrogen As | An electrolysis system comprising a buffer tank |
| CN216039848U (en) * | 2021-07-19 | 2022-03-15 | 无锡隆基氢能科技有限公司 | Electrolytic cell |
| CN113755855A (en) * | 2021-09-09 | 2021-12-07 | 中国船舶重工集团公司第七一八研究所 | Electrolytic cell polar frame and electrolytic cell |
| CN114232004A (en) * | 2021-11-01 | 2022-03-25 | 山东海氢能源科技有限公司 | Water electrolysis cell with integrated electrolysis cells |
| CN114381752A (en) * | 2022-03-01 | 2022-04-22 | 北京中电绿波科技有限公司 | Electrolytic cell with high-efficiency turbulent flow multi-connecting-hole turbulent flow element |
| CN114574887B (en) * | 2022-03-17 | 2024-05-10 | 阳光氢能科技有限公司 | Electrolytic cell polar plate and electrolytic cell |
| CN114990633A (en) * | 2022-05-11 | 2022-09-02 | 同济大学 | Multi-channel liquid inlet and exhaust structure for large alkaline water electrolytic cell |
| CN218951513U (en) * | 2022-10-12 | 2023-05-02 | 无锡隆基氢能科技有限公司 | Bipolar plate and electrolytic cell |
-
2022
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| WO2024078362A1 (en) * | 2022-10-12 | 2024-04-18 | 无锡隆基氢能科技有限公司 | Bipolar plate and electrolytic cell |
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| WO2024078362A1 (en) | 2024-04-18 |
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