CN117758292A - Zero-spacing PEM water electrolysis hydrogen production unit - Google Patents
Zero-spacing PEM water electrolysis hydrogen production unit Download PDFInfo
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- CN117758292A CN117758292A CN202410109161.8A CN202410109161A CN117758292A CN 117758292 A CN117758292 A CN 117758292A CN 202410109161 A CN202410109161 A CN 202410109161A CN 117758292 A CN117758292 A CN 117758292A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 102
- 239000001257 hydrogen Substances 0.000 title claims abstract description 62
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 62
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 238000005868 electrolysis reaction Methods 0.000 title description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 59
- 229910052751 metal Inorganic materials 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims abstract description 50
- 239000012528 membrane Substances 0.000 claims abstract description 44
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000001301 oxygen Substances 0.000 claims abstract description 17
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 17
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 169
- 238000009826 distribution Methods 0.000 claims description 31
- 238000007086 side reaction Methods 0.000 claims description 27
- 238000009792 diffusion process Methods 0.000 claims description 22
- 238000009434 installation Methods 0.000 claims description 15
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 5
- 239000003566 sealing material Substances 0.000 abstract description 4
- 239000003054 catalyst Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000005341 cation exchange Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000003014 ion exchange membrane Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003011 anion exchange membrane Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention provides a zero-spacing PEM electrolytic water hydrogen production unit which relates to the field of electrolytic water hydrogen production, comprising an anode current collecting plate, a cathode current collecting plate, a metal bipolar plate and a membrane electrode, wherein the anode current collecting plate is connected with one side of the metal bipolar plate through the membrane electrode, and the other side of the metal bipolar plate is connected with the cathode current collecting plate through the membrane electrode; the water enters the reaction area corresponding to the membrane electrode from the anode current collecting plate and the anode side of the metal bipolar plate to react to generate oxygen, the oxygen and the water are discharged from the water outlet public channel, the cathode current collecting plate and the cathode side of the metal bipolar plate enter the reaction area corresponding to the membrane electrode to generate hydrogen, and the hydrogen is discharged from the hydrogen outlet. The invention controls the fluid characteristics of the cathode and anode stages by the design of the anode shunt supporting sheet, the anode converging sheet and the cathode converging sheet, and solves the problems of difficult control of fluid in an active area, inconsistent reaction efficiency and insufficient supporting of sealing materials.
Description
Technical Field
The invention relates to the field of hydrogen production by water electrolysis, in particular to a zero-spacing PEM water electrolysis hydrogen production unit.
Background
The hydrogen production by water electrolysis takes water as a reactant, and direct current is applied to the cathode and anode stages of the electrolysis device to produce hydrogen and oxygen, so that the device has simple structure and high purity of the produced hydrogen, and can be popularized and used in large-scale technology. The water electrolysis device mainly can be in structural design: the device comprises a spacing type water electrolysis hydrogen production device and a zero spacing type water electrolysis hydrogen production device. The zero-spacing type water electrolysis hydrogen production device has the characteristics of high current density, high efficiency, high corresponding speed and the like, can be well matched with renewable energy sources (such as wind energy and solar energy), can operate under high pressure of 3-5MPa due to compact structure, and effectively simplifies the compression and storage processes of hydrogen.
Zero-pitch electrolyzed water hydrogen production devices often contain multiple hydrogen production units, each of which is composed primarily of a membrane electrode, a diffusion layer, a polar plate, and a sealing material. The membrane electrode is used as a core component of the reaction and consists of an anode catalytic layer, an ion exchange membrane and a cathode catalytic layer. The ion exchange membrane is generally a solid electrolyte, can effectively isolate the gas generated by the cathode and anode, and can be divided into a cation exchange membrane (generally referred to as a proton exchange membrane) and an anion exchange membrane according to the type of the transportable ions. When the exchange membrane is a cation exchange membrane (PEM), the anode catalyst may decompose water into oxygen, electrons, and protons, which after passing through the exchange membrane, are converted to hydrogen under the influence of the cathode catalyst. The reaction zone of the zero-spacing PEM water electrolysis hydrogen production device can adopt a runner or directly form a flow path of electrolysis water by using a metal net. The use of the metal mesh easily causes randomness and uncontrollability of the electrolytic water flowing in the anode cavity, so that the reaction efficiency of each area in the reaction area is inconsistent, and the service life of the membrane electrode is further damaged. However, the existing zero-spacing PEM water electrolysis hydrogen production device is only designed by using a flow channel in an active region, and is not enough to completely solve the problems of randomness and uncontrollability of the electrolytic water flowing in the anode cavity. In addition, the flow channel design does not provide adequate support for the sealing material due to the discontinuous flat surface (serrated cross section) at the top thereof, thus risking seal failure under high pressure operating conditions.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a zero-spacing PEM water electrolysis hydrogen production unit, which is used for controlling the fluid characteristics of a cathode and an anode through the design of an anode shunt supporting sheet, an anode converging sheet and a cathode converging sheet and solving the problems of difficult fluid control in an active area, inconsistent reaction efficiency and insufficient supporting of a sealing material.
The invention provides a zero-spacing PEM electrolytic water hydrogen production unit, which comprises an anode current collecting plate, a cathode current collecting plate, a metal bipolar plate and a membrane electrode, wherein the anode current collecting plate is connected with one side of the metal bipolar plate through the membrane electrode;
the water enters the reaction area corresponding to the membrane electrode from the anode current collecting plate and the anode side of the metal bipolar plate to react to generate oxygen, the oxygen and the water are discharged from the water outlet public channel, the cathode current collecting plate and the cathode side of the metal bipolar plate enter the reaction area corresponding to the membrane electrode to generate hydrogen, and the hydrogen is discharged from the hydrogen outlet.
Preferably, the two sides of the anode current collecting plate are respectively connected with anode sealing strips, the two sides of the cathode current collecting plate are respectively connected with cathode sealing strips, the cathode side of the metal bipolar plate is connected with cathode sealing strips, and the anode side of the metal bipolar plate is connected with anode sealing strips.
Preferably, the anode current collecting plate is provided with an anode current collecting plate sealing and distributing supporting sheet and an anode current collecting plate sealing and converging supporting sheet, and the anode current collecting plate, the anode current collecting plate sealing and converging supporting sheet, the anode sealing strip and the membrane electrode form an anode sealing cavity;
the cathode current collecting plate is provided with a cathode sealing and converging supporting plate, and the cathode current collecting plate, the cathode sealing and converging supporting plate, a cathode sealing strip and a membrane electrode form a cathode sealing cavity;
the anode side of the metal bipolar plate is provided with an anode side sealing shunt supporting sheet and an anode side sealing converging supporting sheet, and the anode side of the metal bipolar plate, the anode side sealing shunt supporting sheet, the anode side sealing converging supporting sheet, the anode sealing strip and the membrane electrode form an anode side sealing cavity;
the cathode side of the metal bipolar plate is provided with a cathode side sealing confluence supporting sheet, and the cathode side of the metal bipolar plate, the cathode side sealing confluence supporting sheet, the cathode sealing strip and the membrane electrode form a cathode side sealing cavity.
Preferably, the anode current collecting plate is provided with an anode reaction zone, an anode current dividing zone and an anode current collecting zone, one end of the anode reaction zone is connected with the anode current dividing zone, the other end of the anode reaction zone is connected with the anode current collecting zone, the anode current dividing zone is connected with an anode public water inlet, and the anode current collecting zone is connected with an anode public water outlet;
the metal bipolar plate is provided with an anode side reaction area, an anode side flow distribution area and an anode side converging area, one end of the anode side reaction area is connected with the anode side flow distribution area, the other end of the anode side reaction area is connected with the anode side converging area, the anode side flow distribution area is connected with an anode side public water inlet, and the anode side converging area is connected with an anode side public water outlet;
water enters the anode sealing cavity through the anode public water inlet and the anode current collecting plate sealing and distributing supporting piece, and flows into the anode public water outlet through the anode current collecting plate sealing and distributing supporting piece; meanwhile, water enters the anode side sealing cavity through the anode side common water inlet and the anode side sealing shunt supporting piece, and flows into the anode side common water outlet through the anode side sealing confluence supporting piece.
Preferably, a first runner is arranged in the anode reaction zone, a second runner is arranged in the anode side reaction zone, and the first runner and the second runner are in a block-type runner or a straight-through runner;
the first runner is matched with the anode shunting area, the anode converging area and the anode diffusion layer, and the second runner is matched with the anode side shunting area, the anode side converging area and the anode diffusion layer;
water enters from the anode common water inlet and the anode side common water inlet, uniformly enters into the anode sealing cavity and the anode side sealing cavity through the anode diversion area and the anode side diversion area respectively, flows through the first flow passage and the second flow passage with specific geometric dimensions in the anode reaction area and the anode side reaction area, passes through the anode diffusion layer and enters into the corresponding reaction area of the membrane electrode to react to generate oxygen, and the oxygen and unreacted water are discharged from the anode common water outlet and the anode side common water outlet together.
Preferably, the cathode current collecting plate is provided with a cathode reaction zone and a cathode current collecting zone, two ends of the cathode reaction zone are respectively connected with a cathode hydrogen outlet through the cathode current collecting zone, a third flow passage is arranged in the cathode reaction zone, the third flow passage is a serpentine flow passage or a planar flow passage, and the third flow passage is matched with the cathode current collecting zone and the cathode diffusion layer;
the cathode side of the metal bipolar plate is provided with a cathode side reaction zone and a cathode side converging zone, two ends of the cathode side reaction zone are respectively connected with a cathode side hydrogen outlet through the cathode side converging zone, a fourth flow passage is arranged in the cathode side reaction zone, the fourth flow passage is a serpentine flow passage or a planar flow passage, and the fourth flow passage is matched with the cathode side converging zone and the cathode diffusion layer;
the water flow respectively enters the cathode sealing cavity and the cathode side sealing cavity through the cathode converging region and the cathode side converging region, passes through the third flow passage and the fourth flow passage with specific geometric dimensions, passes through the cathode diffusion layer and enters the corresponding reaction region of the membrane electrode to react to generate hydrogen, and the hydrogen is discharged from the cathode hydrogen outlet and the cathode side hydrogen outlet.
Preferably, the first, second, third and fourth flow channels have a groove width of 0.5-2mm, a ridge width to groove width ratio of 0.8-1:1, and a flow channel depth to groove width ratio of 0.5-1:1;
and the height of the cathode reaction zone is 0.1-0.3mm smaller than the cathode mounting surface, and the height of the cathode side reaction zone is 0.1-0.3mm smaller than the cathode side mounting surface.
Preferably, the anode current collecting plate and the metal bipolar plate have the same anode side structure;
an anode flow distribution area and an anode sealing flow distribution supporting piece installation area are arranged between the anode reaction area and the anode public water inlet, the bottom of the anode flow distribution area and the bottom of the first flow channel are at the same height, an anode current collecting plate sealing flow distribution supporting piece is installed on the anode sealing flow distribution supporting piece installation area, and the top plane of the anode current collecting plate sealing flow distribution supporting piece after being installed to the anode sealing flow distribution supporting piece installation area is at the same height as the sealing surface of the first anode plate;
an anode converging region and an anode sealing converging supporting piece mounting region are arranged between the anode reaction region and the anode public water outlet, the bottom of the anode converging region and the bottom of the first flow channel are at the same height, an anode collecting plate sealing converging supporting piece is mounted on the anode sealing converging supporting piece mounting region, and the top plane of the anode collecting plate sealing converging supporting piece mounted on the anode sealing converging supporting piece mounting region is at the same height as the sealing surface of the second anode plate.
Preferably, the cathode current collector plate and the metal bipolar plate are identical in cathode side structure;
a cathode converging region and a cathode sealing converging support piece installation region are arranged between the cathode reaction region and the cathode hydrogen outlet, the bottom of the cathode converging region and the third flow passage part are at the same height, a cathode sealing converging support piece is installed on the cathode sealing converging support piece installation region, and the top plane of the cathode sealing converging support piece after being installed to the cathode sealing converging support piece installation region is at the same height as the cathode sealing surface.
Preferably, the anode current collecting plate sealing and distributing supporting piece, the anode side sealing and distributing supporting piece, the cathode sealing and distributing supporting piece and the cathode side sealing and distributing supporting piece are all provided with sealing structures.
Compared with the prior art, the invention has the following beneficial effects:
(1) The anode side of the metal bipolar plate is provided with the anode shunt supporting piece and the anode confluence supporting piece, so that the distribution of water can be optimized, the pressure drop of the water passing through the anode sealing chamber can be controlled, the fluid characteristics can be regulated, and the reaction efficiency of the anode side can be improved;
(2) The flow channel matched with the flow dividing region, the flow converging region and the diffusion layer is arranged in the anode active region, so that the distribution of water is optimized, and the reaction efficiency of the anode side is improved;
(3) The cathode confluence supporting piece is arranged on the cathode side, so that the pressure drop of gas leaving the cathode sealing chamber is controlled, and the reaction efficiency of the cathode side is improved;
(4) The flow channel matched with the flow dividing region and the diffusion layer is arranged in the cathode active region, so that the distribution of water is optimized, and the reaction efficiency of the cathode side is improved;
(5) The sealing structure design on the anode shunt supporting sheet, the anode confluence supporting sheet and the cathode confluence supporting sheet also improves the sealing strength of the whole sealing structure.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:
FIG. 1 is an exploded view of the structure of the present invention;
fig. 2 is a schematic view of the structure of an anode current collecting plate according to the present invention;
FIG. 3 is a schematic view of the anode side of a metal bipolar plate according to the present invention;
FIG. 4 is an enlarged view of a portion of the water inlet of the anode current collector plate of the present invention;
FIG. 5 is an enlarged view of a portion of the water outlet of the anode current collector plate of the present invention;
fig. 6 is a schematic view showing the structure of a cathode current collector plate according to the present invention;
FIG. 7 is a schematic view of the cathode side of a metal bipolar plate according to the present invention;
fig. 8 is a partial enlarged view of a hydrogen outlet of a cathode current collecting plate according to the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
Examples
According to the zero-spacing PEM water electrolysis hydrogen production unit provided by the invention, as shown in fig. 1-8, the hydrogen production unit comprises an anode current collecting plate 100, a cathode current collecting plate 200, a metal bipolar plate 300 and a membrane electrode 600, wherein the anode current collecting plate 100 is connected with one side of the metal bipolar plate 300 through the membrane electrode 600, and the other side of the metal bipolar plate 300 is connected with the cathode current collecting plate 200 through the membrane electrode 600. Anode sealing strips 400 are respectively connected to two sides of the anode current collecting plate 100, cathode sealing strips 500 are respectively connected to two sides of the cathode current collecting plate 200, cathode sealing strips 500 are connected to the cathode side of the metal bipolar plate 300, and anode sealing strips 400 are connected to the anode side of the metal bipolar plate 300. The intermediate bipolar plate can be stacked by any number as required, with the corresponding addition of other cathode/anode components.
The anode current collecting plate 100 is provided with an anode current collecting plate sealing and distributing supporting sheet 101 and an anode current collecting plate sealing and converging supporting sheet 102, and the anode current collecting plate 100, the anode current collecting plate sealing and distributing supporting sheet 101, the anode current collecting plate sealing and converging supporting sheet 102, an anode sealing strip 400 and a membrane electrode 600 form an anode sealing cavity. The cathode current collecting plate 200 is provided with a cathode sealing and collecting supporting plate 203, and the cathode current collecting plate 200, the cathode sealing and collecting supporting plate 203, a cathode sealing strip 500 and a membrane electrode 600 form a cathode sealing cavity. The anode side of the metal bipolar plate 300 is provided with an anode side sealing shunt supporting piece 301 and an anode side sealing confluence supporting piece 302, and the anode side of the metal bipolar plate 300, the anode side sealing shunt supporting piece 301, the anode side sealing confluence supporting piece 302, the anode sealing strip 400 and the membrane electrode 600 form an anode side sealing cavity. The cathode side of the metal bipolar plate 300 is provided with a cathode side sealing and converging supporting sheet 303, and the cathode side of the metal bipolar plate 300, the cathode side sealing and converging supporting sheet 303, the cathode sealing strip 500 and the membrane electrode 600 form a cathode side sealing cavity. The anode current collecting plate sealing and flow distribution supporting sheet 101, the anode current collecting plate sealing and flow distribution supporting sheet 102, the anode side sealing and flow distribution supporting sheet 301, the anode side sealing and flow distribution supporting sheet 302, the cathode sealing and flow distribution supporting sheet 203 and the cathode side sealing and flow distribution supporting sheet 303 are respectively provided with a sealing structure, and the sealing structure, the anode sealing strip 400 and the cathode sealing strip 500 can be made of rubber materials such as silica gel, EPDM, fluororubber and the like. The sealing confluence/diversion support sheet consists of a section of flat plate and a functional structure, and the material is generally titanium (TA 1/TA 2).
The anode current collecting plate 100 and the metal bipolar plate 300 have the same anode side structure; the anode current collecting plate 100 is provided with an anode reaction zone 110, an anode current distribution zone 114 and an anode current collecting zone 115, one end of the anode reaction zone 110 is connected with the anode current distribution zone 114, the other end of the anode reaction zone 110 is connected with the anode current collecting zone 115, the anode current distribution zone 114 is connected with the anode public water inlet 105, and the anode current collecting zone 115 is connected with the anode public water outlet 106. The metal bipolar plate 300 is provided with an anode side reaction zone 310, an anode side flow distribution zone 314 and an anode side converging zone 315, one end of the anode side reaction zone 310 is connected with the anode side flow distribution zone 314, the other end of the anode side reaction zone 310 is connected with the anode side converging zone 315, the anode side flow distribution zone 314 is connected with the anode side common water inlet 305, and the anode side converging zone 315 is connected with the anode side common water outlet 306. The anode reaction zone 110 is internally provided with a first runner 107, the anode side reaction zone 310 is internally provided with a second runner 307, and the first runner 107 and the second runner 307 are in a block-type runner or a straight-through runner; the first flow channel 107 is mated with the anode split region 114, the anode bus region 115, and the anode diffusion layer 700, and the second flow channel 307 is mated with the anode side split region 314, the anode side bus region 315, and the anode diffusion layer 700.
An anode diversion area 114 and an anode sealing diversion support piece mounting area 118 are arranged between the anode reaction area 110 and the anode public water inlet 105, the bottom of the anode diversion area 114 and the bottom of the first flow channel 107 are positioned at the same height, an anode current collecting plate sealing diversion support piece 101 is mounted on the anode sealing diversion support piece mounting area 118, and the top plane of the anode current collecting plate sealing diversion support piece 101 mounted on the anode sealing diversion support piece mounting area 118 is positioned at the same height as the first anode plate sealing surface 123; an anode converging region 115 and an anode sealing converging support piece mounting region 119 are arranged between the anode reaction region 110 and the anode public water outlet 106, the bottom of the anode converging region 115 and the bottom of the first flow channel 107 are at the same height, an anode collecting plate sealing converging support piece 102 is mounted on the anode sealing converging support piece mounting region 119, and a top plane of the anode collecting plate sealing converging support piece 102 mounted on the anode sealing converging support piece mounting region 119 is at the same height as a second anode plate sealing surface 122.
The cathode current collecting plate 200 and the metal bipolar plate 300 have the same cathode side structure; the cathode collector 200 is provided with a cathode reaction zone 211 and a cathode converging zone 217, two ends of the cathode reaction zone 211 are respectively connected with a cathode hydrogen outlet 209 through the cathode converging zone 217, a third flow passage 208 is arranged in the cathode reaction zone 211, the third flow passage 208 is a serpentine flow passage or a planar flow passage, and the third flow passage 208 is matched with the cathode converging zone 217 and the cathode diffusion layer 800. The cathode side of the metal bipolar plate 300 is provided with a cathode side reaction zone 311 and a cathode side converging zone 317, two ends of the cathode side reaction zone 311 are respectively connected with a cathode side hydrogen outlet 309 through the cathode side converging zone 317, a fourth runner 308 is arranged in the cathode side reaction zone 311, the fourth runner 308 is a serpentine runner or a planar runner, and the fourth runner 308 is matched with the cathode side converging zone 317 and the cathode diffusion layer 800. A cathode confluence region 217 and a cathode sealing confluence support sheet mounting region 221 are arranged between the cathode reaction region 210 and the cathode hydrogen outlet 209, the bottom of the cathode confluence region 217 is at the same height as the third flow channel 208, the cathode sealing confluence support sheet mounting region 221 is provided with a cathode sealing confluence support sheet 203, and the top plane of the cathode sealing confluence support sheet 203 after being mounted to the cathode sealing confluence support sheet mounting region 221 is at the same height as the cathode sealing surface 223.
Wherein the groove widths of the first flow channel 107, the second flow channel 307, the third flow channel 208 and the fourth flow channel 308 are 0.5-2mm, the ratio of ridge width to groove width is 0.8-1.2:1, and the ratio of flow channel depth to groove width is 0.5-1:1; and the cathode reaction zone 211 is 0.1-0.3mm smaller in height than the cathode mounting surface 213 and the cathode side reaction zone 311 is 0.1-0.3mm smaller in height than the cathode side mounting surface 313. The anode shunt region 114 uses a lattice structure with a lower density, and the anode bus region 115 uses a lattice structure with a lower density; the cathode bus region 217 uses a higher density lattice.
Working principle: water enters through the anode common water inlet 105 and the anode current collecting plate sealing and distributing support piece 101, uniformly enters into the anode sealing cavity through the anode current collecting plate sealing and distributing area 114, flows through the first flow channel 107 with a specific geometric dimension in the anode reaction area 110, passes through the anode diffusion layer 700 and enters into the corresponding reaction area of the membrane electrode 600 to react to generate oxygen, and the oxygen and unreacted water are discharged through the anode common water outlet 106 together through the anode current collecting plate sealing and distributing support piece 102; meanwhile, water enters through the anode side common water inlet 305 and the anode side sealing and splitting support sheet 301, uniformly enters into the anode side sealing cavity through the anode side splitting area 314, flows through the second flow channel 307 with a specific geometric dimension in the anode side reaction area 310, passes through the anode diffusion layer 700 and enters into the corresponding reaction area of the membrane electrode 600 to react to generate oxygen, and the oxygen and unreacted water are discharged through the anode side sealing and splitting support sheet 302 and the anode side common water outlet 306;
the water flows through the cathode confluence region 217 and the cathode side confluence region 317 into the cathode sealing cavity and the cathode side sealing cavity respectively, the water flows through the third flow channel 208 and the fourth flow channel 308 with specific geometric dimensions, passes through the cathode diffusion layer 800 and enters the corresponding reaction region of the membrane electrode 600 to react to generate hydrogen, and the hydrogen is discharged from the cathode hydrogen outlet 209 and the cathode side hydrogen outlet 309.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and are not to be construed as limiting the present application.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.
Claims (10)
1. A zero-spacing PEM electrolytic water hydrogen production unit, which is characterized by comprising an anode current collecting plate (100), a cathode current collecting plate (200), a metal bipolar plate (300) and a membrane electrode (600), wherein the anode current collecting plate (100) is connected with one side of the metal bipolar plate (300) through the membrane electrode (600), and the other side of the metal bipolar plate (300) is connected with the cathode current collecting plate (200) through the membrane electrode (600);
water enters the corresponding reaction area of the membrane electrode (600) from the anode current collecting plate (100) and the anode side of the metal bipolar plate (300) to react to generate oxygen, the oxygen and the water are discharged from a water outlet common channel, hydrogen is generated from the cathode current collecting plate (200) and the cathode side of the metal bipolar plate (300) entering the corresponding reaction area of the membrane electrode (600), and the oxygen is discharged from a hydrogen outlet.
2. The zero-pitch PEM electrolyzed water hydrogen production unit of claim 1 wherein both sides of said anode current collector plate (100) are respectively connected with anode sealing strips (400), both sides of said cathode current collector plate (200) are respectively connected with cathode sealing strips (500), the cathode side of said metal bipolar plate (300) is connected with said cathode sealing strips (500), and the anode side of said metal bipolar plate (300) is connected with said anode sealing strips (400).
3. The zero-pitch PEM electrolyzed water hydrogen production unit of claim 2 wherein an anode current collector plate seal split support sheet (101), an anode current collector plate seal bussing support sheet (102) are provided on the anode current collector plate (100), the anode current collector plate seal split support sheet (101), the anode current collector plate seal bussing support sheet (102), the anode seal strip (400) and the membrane electrode (600) form an anode seal cavity;
a cathode sealing confluence supporting sheet (203) is arranged on the cathode current collecting plate (200), and a cathode sealing cavity is formed by the cathode current collecting plate (200), the cathode sealing confluence supporting sheet (203), the cathode sealing strip (500) and the membrane electrode (600);
an anode side sealing shunt supporting sheet (301) and an anode side sealing confluence supporting sheet (302) are arranged on the anode side of the metal bipolar plate (300), and an anode side sealing cavity is formed by the anode side of the metal bipolar plate (300), the anode side sealing shunt supporting sheet (301), the anode side sealing confluence supporting sheet (302), the anode sealing strip (400) and the membrane electrode (600);
the cathode side of the metal bipolar plate (300) is provided with a cathode side sealing confluence supporting sheet (303), and the cathode side of the metal bipolar plate (300), the cathode side sealing confluence supporting sheet (303), the cathode sealing strip (500) and the membrane electrode (600) form a cathode side sealing cavity.
4. A zero-pitch PEM electrolyzed water hydrogen production unit according to claim 3 wherein said anode current collector plate (100) is provided with an anode reaction zone (110), an anode current distribution zone (114) and an anode current collection zone (115), one end of said anode reaction zone (110) is connected to said anode current distribution zone (114), the other end of said anode reaction zone (110) is connected to said anode current collection zone (115), said anode current distribution zone (114) is connected to an anode common water inlet (105), and said anode current collection zone (115) is connected to an anode common water outlet (106);
the metal bipolar plate (300) is provided with an anode side reaction zone (310), an anode side flow distribution zone (314) and an anode side converging zone (315), one end of the anode side reaction zone (310) is connected with the anode side flow distribution zone (314), the other end of the anode side reaction zone (310) is connected with the anode side converging zone (315), the anode side flow distribution zone (314) is connected with an anode side common water inlet (305), and the anode side converging zone (315) is connected with an anode side common water outlet (306);
water enters the anode sealing cavity through the anode common water inlet (105) and the anode current collecting plate sealing and distributing supporting sheet (101), and flows into the anode common water outlet (106) through the anode current collecting plate sealing and distributing supporting sheet (102); at the same time, water enters the anode side sealing cavity through the anode side common water inlet (305) and the anode side sealing shunt supporting piece (301), and flows into the anode side common water outlet (306) through the anode side sealing confluence supporting piece (302).
5. The zero-pitch PEM electrolyzed water hydrogen production unit of claim 4 wherein a first flow channel (107) is disposed within the anode reaction zone (110), a second flow channel (307) is disposed within the anode side reaction zone (310), the first flow channel (107) and the second flow channel (307) are in a block-type flow channel or a straight-through flow channel;
the first flow channel (107) is matched with the anode shunt region (114), the anode confluence region (115) and the anode diffusion layer (700), and the second flow channel (307) is matched with the anode side shunt region (314), the anode side confluence region (315) and the anode diffusion layer (700);
water enters from the anode common water inlet (105) and the anode side common water inlet (305), uniformly enters into an anode sealing cavity and an anode side sealing cavity through the anode diversion area (114) and the anode side diversion area (314), respectively, flows through the first flow channel (107) and the second flow channel (307) with specific geometric dimensions in the anode reaction area (110) and the anode side reaction area (310), passes through the anode diffusion layer (700) and enters into the corresponding reaction area of the membrane electrode (600) to react to generate oxygen, and the oxygen and unreacted water are discharged from the anode common water outlet (106) and the anode side common water outlet (306) together.
6. The zero-pitch PEM electrolyzed water hydrogen production unit according to claim 5, wherein a cathode reaction zone (211) and a cathode confluence zone (217) are arranged on the cathode current collection plate (200), two ends of the cathode reaction zone (211) are respectively connected with a cathode hydrogen outlet (209) through the cathode confluence zone (217), a third runner (208) is arranged in the cathode reaction zone (211), the third runner (208) is a serpentine runner or a planar runner, and the third runner (208) is matched with the cathode confluence zone (217) and a cathode diffusion layer (800);
the cathode side of the metal bipolar plate (300) is provided with a cathode side reaction zone (311) and a cathode side converging zone (317), two ends of the cathode side reaction zone (311) are respectively connected with a cathode side hydrogen outlet (309) through the cathode side converging zone (317), a fourth flow passage (308) is arranged in the cathode side reaction zone (311), the fourth flow passage (308) is a serpentine flow passage or a planar flow passage, and the fourth flow passage (308) is matched with the cathode side converging zone (317) and the cathode diffusion layer (800);
the water flows through the cathode confluence region (217) and the cathode side confluence region (317) respectively enter the cathode sealing cavity and the cathode side sealing cavity, the water flows through the third flow channel (208) and the fourth flow channel (308) with specific geometric dimensions, passes through the cathode diffusion layer (800) and enters the corresponding reaction region of the membrane electrode (600) to react to generate hydrogen, and the hydrogen is discharged from the cathode hydrogen outlet (209) and the cathode side hydrogen outlet (309).
7. The zero-pitch PEM electrolyzed water hydrogen production unit of claim 6 wherein the first flow channels (107), the second flow channels (307), the third flow channels (208), and the fourth flow channels (308) have a channel width of 0.5-2mm, a ridge width to channel width ratio of 0.8-1.2:1, and a channel depth to channel width ratio of 0.5-1:1;
and the height of the cathode reaction zone (211) is 0.1-0.3mm smaller than the cathode mounting surface (213), and the height of the cathode side reaction zone (311) is 0.1-0.3mm smaller than the cathode side mounting surface (313).
8. The zero-pitch PEM electrolyzed water hydrogen production unit of claim 6 wherein said anode current collector plate (100) and said metallic bipolar plate (300) are structurally identical on the anode side;
the anode reaction zone (110) and the anode common water inlet (105) are provided with an anode diversion zone (114) and an anode sealing diversion support piece installation zone (118), the bottom of the anode diversion zone (114) and the bottom of the first runner (107) are positioned at the same height, the anode collecting plate sealing diversion support piece (101) is installed on the anode sealing diversion support piece installation zone (118), and the top plane of the anode collecting plate sealing diversion support piece (101) which is installed on the anode sealing diversion support piece installation zone (118) is positioned at the same height as the first anode plate sealing surface (123);
the anode reaction zone (110) and the anode public water outlet (106) are provided with an anode converging zone (115) and an anode sealing converging support piece installation zone (119), the bottom of the anode converging zone (115) and the bottom of the first runner (107) are positioned at the same height, the anode sealing converging support piece installation zone (119) is provided with an anode collecting plate sealing converging support piece (102), and the anode collecting plate sealing converging support piece (102) is installed to the top plane behind the anode sealing converging support piece installation zone (119) and the second anode plate sealing surface (122) are positioned at the same height.
9. The zero-pitch PEM electrolyzed water hydrogen production unit of claim 6 wherein said cathode current collector plate (200) and said metallic bipolar plate (300) are structurally identical on the cathode side;
the cathode reaction zone (210) and the cathode hydrogen outlet (209) are arranged with a cathode converging zone (217) and a cathode sealing converging support piece installation zone (221), the bottom of the cathode converging zone (217) and the third flow channel (208) are positioned at the same height, the cathode sealing converging support piece installation zone (221) is provided with a cathode sealing converging support piece (203), and the top plane of the cathode sealing converging support piece (203) after being installed to the cathode sealing converging support piece installation zone (221) is positioned at the same height with a cathode sealing surface (223).
10. A zero-pitch PEM electrolyzed water hydrogen production unit according to claim 3 wherein the anode current collector plate seal split support sheet (101), the anode current collector plate seal split support sheet (102), the anode side seal split support sheet (301), the anode side seal split support sheet (302), the cathode seal split support sheet (203) and the cathode side seal split support sheet (303) are each provided with a seal structure thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410109161.8A CN117758292A (en) | 2024-01-25 | 2024-01-25 | Zero-spacing PEM water electrolysis hydrogen production unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410109161.8A CN117758292A (en) | 2024-01-25 | 2024-01-25 | Zero-spacing PEM water electrolysis hydrogen production unit |
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| Publication Number | Publication Date |
|---|---|
| CN117758292A true CN117758292A (en) | 2024-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410109161.8A Pending CN117758292A (en) | 2024-01-25 | 2024-01-25 | Zero-spacing PEM water electrolysis hydrogen production unit |
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| Country | Link |
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| CN (1) | CN117758292A (en) |
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- 2024-01-25 CN CN202410109161.8A patent/CN117758292A/en active Pending
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