CN115652348A - Frame component based on PEM (proton exchange membrane) electrolytic stack - Google Patents
Frame component based on PEM (proton exchange membrane) electrolytic stack Download PDFInfo
- Publication number
- CN115652348A CN115652348A CN202211224672.1A CN202211224672A CN115652348A CN 115652348 A CN115652348 A CN 115652348A CN 202211224672 A CN202211224672 A CN 202211224672A CN 115652348 A CN115652348 A CN 115652348A
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- CN
- China
- Prior art keywords
- frame
- sealing
- frame assembly
- convex rib
- water
- 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.)
- Granted
Links
- 239000012528 membrane Substances 0.000 title claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000007789 sealing Methods 0.000 claims description 61
- 238000005868 electrolysis reaction Methods 0.000 claims description 22
- 239000001257 hydrogen Substances 0.000 description 8
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- -1 hydrogen ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- Y02E60/50—Fuel cells
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention relates to the technical field of electrolytic stacks, and discloses a frame assembly based on a PEM electrolytic stack, which has stable pure water flow and higher reliability, and comprises at least two frames (10) which are arranged in a stacking way, wherein a plurality of groups of water flow channels (101) are radially arranged on one end surface of each frame (10), a guide plate (101 a) is arranged in each water flow channel (101), and the outer end of each guide plate (101 a) forms a slope along the inner end direction; the slope is set to 3.5-4.1.
Description
Technical Field
The invention relates to the technical field of electrolytic stacks, in particular to a frame assembly based on a PEM electrolytic stack.
Background
The PEM pure water electrolysis technology is a method which is mainly developed and even preferred in the field of hydrogen production at present. The water electrolyzer with proton exchange membrane can obtain high-purity hydrogen and oxygen, and its principle is that two sides of proton exchange membrane are equipped with electrode catalyst layers to obtain membrane electrode. The membrane electrode is fixed through the frames on the two sides, the two ends of the frames are provided with a plurality of groups of water inlet channels, pure water is provided for membrane electrode electrolysis, the pure water is decomposed to generate hydrogen ions and oxygen, and the hydrogen ions penetrate through the proton exchange membrane to reach the cathode side and are combined with electrons to generate hydrogen.
However, when the flow rate of pure water input from the water inlet channel is unstable, the amount of hydrogen/oxygen generated by electrolysis may be reduced; or the dry burning of the electrolytic component is caused, thereby influencing the gas output and the operation reliability of the electrolytic stack.
Therefore, how to ensure the stability and consistency of the water delivery flow rate of the water inlet/outlet channels at the two ends of the frame becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problem that in the prior art, when the flow rate of pure water input from a water inlet channel is unstable, the gas amount of hydrogen/oxygen generated by electrolysis is possibly reduced, and the gas output of an electrolytic stack is further influenced, and provides a frame assembly based on a PEM electrolytic stack, which has stable pure water flow and higher reliability.
The technical scheme adopted by the invention for solving the technical problems is as follows: a frame assembly based on a PEM electrolyser stack is constructed,
comprises at least two frames which are arranged in a stacked manner,
a plurality of groups of water flow channels are radially arranged on one end face of the frame, a guide plate is arranged in each water flow channel, and the outer end of each guide plate forms a slope along the inner end direction;
the slope of the slope is set to 3.5-4.1.
In some embodiments, the slope is set at 3.7 ° to 3.9 °.
In some embodiments, the inner edge of the frame is provided with water/vent grooves which are arranged in parallel, the interval of the water/vent grooves is set to be 1.8mm-2.5mm,
the height of the water/air passing groove is set to be 1.2mm-1.6mm.
In some embodiments, an extended lip is provided at the inner edge of the frame, the lip being annularly disposed inside the frame.
In some embodiments, the horizontal direction of the lip forms an obtuse angle of 100 ° -120 ° with the vertical direction of the frame.
In some embodiments, a first sealing rib arranged annularly is arranged on the inner edge end face of the frame,
the end face of the outer edge of the frame is provided with a second sealing convex rib which is annularly arranged,
the first sealing rib and the second sealing rib are matched with the sealing component to limit the water flow field.
In some embodiments, an annularly arranged third sealing convex rib is arranged on the outer edge end face of the water flow channel,
and a fourth sealing convex rib is arranged between the end part of the first sealing convex rib and the end part of the third sealing convex rib, and the fourth sealing convex rib is respectively connected with the first sealing convex rib and the third sealing convex rib.
In some embodiments, a proton exchange membrane is disposed between the frames in a stacked arrangement.
In some embodiments, the frame is provided in a square or circular shape.
The frame assembly based on the PEM electrolytic stack comprises at least two frames which are arranged in a stacking mode, a plurality of groups of water flow channels are radially arranged on one end face of each frame, a guide plate is arranged in each water flow channel, and the outer end of each guide plate forms a slope along the inner end direction; the slope of the slope is set to 3.5-4.1 deg. Compared with the prior art, through all setting up the guide plate in each rivers passageway, and the slope setting of this guide plate is between 3.5-4.1, when letting in the pure water, through being equipped with the guide plate of slope, on the one hand, can promote the velocity of flow of rivers, and then improve the velocity of flow stability and the uniformity of pure water to ensure PEM electrolysis pile electrolysis production tolerance, and stable rivers field, also can prevent electrolysis subassembly dry combustion method, and then improve the security of electrolysis subassembly's operation.
On the other hand, the strength of the whole frame can be improved through the guide plate with the slope.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a block diagram of one embodiment of a frame assembly for providing a PEM-based electrolysis stack according to the present invention;
FIG. 2 is a block diagram of another embodiment of the present invention providing a PEM electrolysis stack based frame assembly;
FIG. 3 is an enlarged partial view of another embodiment of the present invention providing a PEM based electrolysis stack frame assembly;
FIG. 4 is an enlarged view of one embodiment of the invention providing a frame structure at A in FIG. 1;
fig. 5 is an enlarged view of one embodiment B of the invention providing a frame structure in fig. 2.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1-5, in a first embodiment of a PEM-based electrolyser stack of the present invention, the PEM-based electrolyser stack frame assembly comprises at least two frames 10 arranged one above the other.
Wherein, the frame 10 is provided as a square body or a circular body of a hollow structure.
The frame 10 includes at least one anode frame and at least one cathode frame.
Specifically, the cathode frame is attached to the upper end face of the anode frame;
a proton exchange membrane (not shown) is arranged between the anode frame and the cathode frame in a fitting manner;
further, as shown in fig. 1 and 2, a plurality of sets of water flow channels 101 are radially disposed on one end surface of the frame 10, wherein the water flow channels 101 are disposed at an inner edge of the frame 10, and pure water is introduced from the outside through the water flow channels 101 at one side of the frame 10 and then flows out through the water flow channels 101 at the other side (or the opposite side) of the frame 10 to form a water flow field.
Further, a guide plate 101a is provided in each water flow passage 101, wherein an outer end (corresponding to the direction of the outer edge of the frame 10) of the guide plate 101a is sloped along an inner end (corresponding to the direction of the inner edge of the frame 10), and the slope of the slope is set to 3.5 ° to 4.1 °.
Wherein, the slope of the guide plate 101a can be set to 3.7-3.9 degrees, so as to improve the water inlet/outlet performance of the frame 10;
on the other hand, a baffle plate 101a is provided in the water flow passage 101 to increase the strength of the frame 10 to improve the stability when the frames 10 are stacked.
Specifically, when external pure water is introduced through one side of the frame 10, most of the pure water enters the frame 10 through the water flow channel 101 to form an electrolytic water flow field, the other part of the pure water is introduced into the frame 10 through a slope with a certain gradient, a guide plate 101a is arranged in each water flow channel 101, the gradient of the guide plate 101a is set to be 3.5-4.1 degrees, and when the pure water is introduced, the flow rate of the pure water introduced into the water flow channels 101 can be increased through the guide plate 101a with the gradient, so that the stability and consistency of the flow rate of the pure water introduction/output are ensured, and the amount of gas generated by the PEM electrolytic stack electrolysis is ensured; and the stable water flow field can also prevent the electrolytic component from being dried, thereby improving the operation safety of the electrolytic component.
On the other hand, the strength of the entire frame 10 can be increased by providing the guide plate with a slope.
In some embodiments, in order to improve the reliability of water/air ventilation of the frame 10, water/air ventilation grooves 102 may be formed in parallel at the inner edge of the frame 10, wherein the water/air ventilation grooves 102 are symmetrically formed.
Further, as shown in fig. 3, in order to ensure the uniformity and stability of the water/air flow, the interval of the channel grooves 102a of the water/air flow groove 102 may be set to 1.8mm to 2.5mm, and the height of the channel grooves 102a of the water/air flow groove 102 may be set to 1.2mm to 1.6mm.
In the present embodiment, the flow channel grooves 102a of the water/air passage grooves 102 are spaced 1.8mm to 2.5mm apart and have a height of 1.2mm to 1.6mm, so that when the proton exchange membrane (not shown) and the multi-layer sealing member provided on the frame 10 are compressed and sealed, the flow channel grooves 102a have a sufficient width and height, and thus the proton exchange membrane (not shown) and the sealing member (not shown) are prevented from sinking into the flow channel grooves 102a due to compression or deformation, and affecting the flow rate or flow rate of the inlet/outlet water and the outlet air.
In some embodiments, to reduce the axial shear of hydrogen within the stack, an extended lip 106 may be provided at the inner edge of the frame 10, wherein the lip 106 is annularly disposed inside the frame 10.
For example, the annular lip 106 provided on the inner edge of the frame 10 can provide an axial supporting force for the contacting side of the proton exchange membrane (not shown) and the inner edge of the frame 10, thereby improving the reliability of the operation of the proton exchange membrane (not shown) on the membrane electrode frame assembly.
Further, the horizontal direction of the lip 106 forms an obtuse angle of 100 to 120 ° with the vertical direction of the frame 10, and by setting the intersection groove of the lip 106 and the frame 10 to be an obtuse angle of 100 to 120 °, the stacked proton exchange membrane (not shown) and sealing member (not shown) are embedded into the lip 106, and the bent portion of the proton exchange membrane (not shown) and sealing member (not shown) forms a certain slope, which can reduce the tearing of the proton exchange membrane (not shown) by the axial shear force, so as to improve the reliability of the operation of the proton exchange membrane (not shown).
In some embodiments, as shown in fig. 4 and 5, in order to ensure the sealing performance of the frame 10 in cooperation with the proton exchange membrane (not shown) and the sealing member (not shown), a first sealing rib 103 may be disposed on an inner edge end surface of the frame 10 in an annular shape, and
the second sealing rib 108 may be disposed annularly on an outer edge end surface of the frame 10, wherein the first sealing rib 103 and the second sealing rib 108 are engaged with a sealing member (not shown) to limit a water flow field, and the first sealing rib 103 and the second sealing rib 108 squeeze the proton exchange membrane (not shown) and the sealing member (not shown), so as to ensure the sealing performance of the frame 10 engaged with the proton exchange membrane (not shown) and the sealing member (not shown), thereby avoiding air leakage after water leakage during electrolysis.
In some embodiments, as shown in fig. 5, in order to ensure the sealing performance of the frame 10 in cooperation with the proton exchange membrane (not shown) and the sealing member (not shown), a third sealing rib 104 may be disposed on the outer edge end surfaces of the water flow channel 101 and the air flow channel (not shown), wherein the air flow channel (not shown) is disposed on the adjacent side of the water flow channel 101.
Specifically, a fourth sealing rib 105 is disposed between an end of the first sealing rib 103 and an end of the third sealing rib 104, and the fourth sealing rib 105 is respectively connected to the first sealing rib 103 and the third sealing rib 104 in a closing manner. By providing the fourth sealing rib 105, the sealing strength of the back side when the frames 10 are laminated can be increased.
In particular, since 500m 3 The overall size of the frame 10 is large (about 1.2m × 1.2m), and when a large number of regions where no sealing rib is provided are present between the positioning hole (not shown) and the positioning hole (not shown) or between the water flow channel 101 and the air flow channel (not shown), and the sealing member (not shown) may partially sink when sealing, resulting in poor sealing performance, the fourth sealing rib 105 is provided between the end of the first sealing rib 103 and the end of the third sealing rib 104, thereby reducing the problem of leakage after water leakage of the electrolytic stack due to sinking or deformation of the sealing member (not shown) when the frame 10 is sealed with the proton exchange membrane (not shown) and the sealing member (not shown) due to the absence of the fourth sealing rib 105 between the water flow channel 101 and the air flow channel (not shown).
While the present invention has been described with reference to the particular illustrative embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalent arrangements, and equivalents thereof, which may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. Frame assembly based on a PEM electrolysis stack, characterized in that,
comprises at least two frames which are arranged in a stacked manner,
a plurality of groups of water flow channels are radially arranged on one end face of the frame, a guide plate is arranged in each water flow channel, and the outer end of each guide plate forms a slope along the inner end direction;
the slope of the slope is set to 3.5-4.1.
2. The PEM electrolysis stack based frame assembly according to claim 1,
the slope of the ramp is set to 3.7-3.9.
3. The PEM electrolysis stack based frame assembly according to claim 1,
the inner edge of the frame is provided with water/vent grooves which are arranged in parallel, the interval of the water/vent grooves is set to be 1.8mm-2.5mm,
the height of the water/air passing groove is set to be 1.2mm-1.6mm.
4. The PEM electrolysis stack based frame assembly according to claim 3,
an extended lip is provided at the inner edge of the frame, the lip being annularly disposed inside the frame.
5. The PEM electrolysis stack based frame assembly according to claim 4,
the horizontal direction of the lip forms an obtuse angle of 100-120 degrees with the vertical direction of the frame.
6. The PEM electrolysis stack based frame assembly according to claim 1,
the end surface of the inner edge of the frame is provided with a first sealing convex rib which is annularly arranged,
the end surface of the outer edge of the frame is provided with a second sealing convex rib which is annularly arranged,
the first sealing rib and the second sealing rib are matched with the sealing component to limit the water flow field.
7. The PEM electrolysis stack based frame assembly according to claim 6,
the end surface of the outer edge of the water flow channel is provided with a third sealing convex rib which is annularly arranged,
and a fourth sealing convex rib is arranged between the end part of the first sealing convex rib and the end part of the third sealing convex rib, and the fourth sealing convex rib is respectively connected with the first sealing convex rib and the third sealing convex rib.
8. The PEM electrolysis stack based frame assembly according to claim 7,
and a proton exchange membrane is arranged between the frames which are arranged in a stacked manner.
9. The PEM electrolysis stack based frame assembly of claims 1-8, wherein said frame is provided in a square or circular configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211224672.1A CN115652348B (en) | 2022-10-09 | 2022-10-09 | Frame assembly based on PEM (PEM) electrolytic stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211224672.1A CN115652348B (en) | 2022-10-09 | 2022-10-09 | Frame assembly based on PEM (PEM) electrolytic stack |
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| Publication Number | Publication Date |
|---|---|
| CN115652348A true CN115652348A (en) | 2023-01-31 |
| CN115652348B CN115652348B (en) | 2024-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211224672.1A Active CN115652348B (en) | 2022-10-09 | 2022-10-09 | Frame assembly based on PEM (PEM) electrolytic stack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117867540A (en) * | 2023-12-27 | 2024-04-12 | 广东卡沃罗氢科技有限公司 | Frame structure of proton exchange membrane electrolytic cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2915887Y (en) * | 2006-06-08 | 2007-06-27 | 娄底市德胜能源设备发展有限公司 | Hydrogen and oxygen water path separated type electrolytic tank |
| CN106887596A (en) * | 2015-12-12 | 2017-06-23 | 中国科学院大连化学物理研究所 | A kind of fuel battery double plates for being conducive to draining |
| CN109411782A (en) * | 2018-12-13 | 2019-03-01 | 中南大学 | A kind of liquid flow frame of all-vanadium flow battery |
| CN114262909A (en) * | 2022-01-20 | 2022-04-01 | 氢鸿(杭州)科技有限公司 | Proton exchange membrane water electrolyzer, system and method |
| CN216688342U (en) * | 2021-12-23 | 2022-06-07 | 国家电投集团氢能科技发展有限公司 | Hydrogen production cell group and water electrolysis hydrogen production cell |
-
2022
- 2022-10-09 CN CN202211224672.1A patent/CN115652348B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2915887Y (en) * | 2006-06-08 | 2007-06-27 | 娄底市德胜能源设备发展有限公司 | Hydrogen and oxygen water path separated type electrolytic tank |
| CN106887596A (en) * | 2015-12-12 | 2017-06-23 | 中国科学院大连化学物理研究所 | A kind of fuel battery double plates for being conducive to draining |
| CN109411782A (en) * | 2018-12-13 | 2019-03-01 | 中南大学 | A kind of liquid flow frame of all-vanadium flow battery |
| CN216688342U (en) * | 2021-12-23 | 2022-06-07 | 国家电投集团氢能科技发展有限公司 | Hydrogen production cell group and water electrolysis hydrogen production cell |
| CN114262909A (en) * | 2022-01-20 | 2022-04-01 | 氢鸿(杭州)科技有限公司 | Proton exchange membrane water electrolyzer, system and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117867540A (en) * | 2023-12-27 | 2024-04-12 | 广东卡沃罗氢科技有限公司 | Frame structure of proton exchange membrane electrolytic cell |
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| Publication number | Publication date |
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| CN115652348B (en) | 2024-10-01 |
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