CN217361652U - Novel fuel cell integrated bipolar plate convenient for forming electric pile - Google Patents
Novel fuel cell integrated bipolar plate convenient for forming electric pile Download PDFInfo
- Publication number
- CN217361652U CN217361652U CN202220583390.XU CN202220583390U CN217361652U CN 217361652 U CN217361652 U CN 217361652U CN 202220583390 U CN202220583390 U CN 202220583390U CN 217361652 U CN217361652 U CN 217361652U
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- Prior art keywords
- bipolar plate
- oxygen
- cathode side
- anode side
- flow channel
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- 239000000446 fuel Substances 0.000 title claims abstract description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 103
- 239000001301 oxygen Substances 0.000 claims abstract description 103
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 103
- 239000001257 hydrogen Substances 0.000 claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 31
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims 4
- 239000007789 gas Substances 0.000 abstract description 18
- 239000012495 reaction gas Substances 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract 1
- 150000002431 hydrogen Chemical class 0.000 abstract 1
- 230000004913 activation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- Y02E60/50—Fuel cells
Abstract
A novel fuel cell integrated bipolar plate convenient for forming a galvanic pile belongs to the field of fuel cell bipolar plates. The bipolar plate is integrated with both an anode flow channel and a cathode flow channel. The bipolar plate is provided with a first step surface, an oxygen outlet, an anode side flow channel, an anode side ribbed plate, a center column, a hydrogen flow port, a side boss, a hydrogen main flow channel, a second step surface, an oxygen outlet, a cathode side flow channel, a cathode side ribbed plate and an oxygen inlet groove. The oxygen adopts a central gas inlet mode, so that a gas inlet path can be effectively shortened under the same working area, and the reaction gas is quickly and uniformly distributed in a flow field area; and the hydrogen diffusion capacity is stronger, and a side air inlet mode is adopted. The bipolar plate is simultaneously provided with a central column release groove, an oxygen main flow channel, a hydrogen main flow channel, an oxygen intake groove release port and other structures, and the sealing problem when gas in the fuel cell stack adopts a central gas intake mode can be effectively solved.
Description
Technical Field
The invention relates to a novel fuel cell integrated bipolar plate convenient for forming a galvanic pile, in particular to a novel bipolar plate which adopts a radial flow field and integrates an anode plate and a cathode plate together, belonging to the field of proton exchange membrane fuel cells.
Background
The conventional flow channel structure direct flow channel is adopted in the conventional fuel cell stack, and when the fuel cell works, the polar plate adopting the conventional direct flow channel structure can cause the gas to be distributed unevenly in a reaction area, so that partial activation area reaction is insufficient, the local current density in the cell is low, and the rate of electrochemical reaction is influenced. In the radial flow field, reaction gas enters from the center of the polar plate and diffuses towards the circumference along the flow channel, and the gas inlet path of the cathode side can be effectively shortened under the same working area, so that the gas pressure drop is reduced; the reaction gas can be rapidly and uniformly distributed in the working area.
However, the existing few radial flow field designs do not involve the problem of gas sealing, and when oxygen adopts a central gas inlet mode, it is necessary to ensure that oxygen can only diffuse to the periphery when reaching a cathode flow field, and can not diffuse to the periphery at an anode flow field, and can only continue to diffuse to the cathode flow field along a central channel, so that the problem of gas sealing property causes that the existing radial flow field structure is only suitable for a single structure and is difficult to be applied to a fuel cell stack. In order to solve the problems, the anode plate and the cathode plate are integrated together, so that the problem of gas sealing when gas adopts central gas inlet can be effectively solved.
Disclosure of Invention
Aiming at the problem that gas is difficult to seal when oxygen adopts central gas inlet, the invention provides a novel fuel cell integrated bipolar plate which is convenient for forming a galvanic pile.
The invention is realized by the following technical scheme: a novel fuel cell integrated bipolar plate convenient for forming a stack comprises a bipolar plate anode side and a bipolar plate cathode side; the anode side of the bipolar plate and the cathode side of the bipolar plate are combined together, and the maximum inner wall inner diameter of the anode side of the bipolar plate is the same as the outer diameter of the cathode side of the bipolar plate; the anode side of the bipolar plate is provided with a first step surface, an oxygen outlet, an anode side flow channel, anode side ribbed plates, a central column, a hydrogen flow port, a side boss and a hydrogen main flow channel, wherein the oxygen outlet is a through hole positioned on the outer wall of the anode side of the bipolar plate and the cathode side of the bipolar plate, the lowest end of the oxygen outlet on the anode side of the bipolar plate is positioned on the upper side of the first step surface, the anode side ribbed plates are annularly arranged on the anode side, the central column is positioned at the central position of the anode side flow channel, the hydrogen flow port is positioned on the inner wall of the anode side of the bipolar plate, and the hydrogen flow port is connected with the hydrogen main flow channel inside the bipolar plate; the cathode side of the bipolar plate is provided with a second step surface, an oxygen outlet, a cathode side flow channel, a cathode side ribbed plate and an oxygen inlet groove, the lowest end of the oxygen outlet on the cathode side of the bipolar plate is flush with the second step surface, the cathode side ribbed plate is annularly arranged on the cathode side, and the oxygen inlet groove is positioned in the center of the cathode side flow channel; the anode side rib plate is of a semicircular annular structure and is provided with an anode side rib plate top surface and an anode side rib plate side surface, and the anode side rib plate top surface and the first step surface are on the same plane; the cathode side rib plate is of a quarter-ring-shaped structure and is provided with a cathode side rib plate top surface and a cathode side rib plate side surface, and the cathode side rib plate top surface and the second step surface are on the same plane; the side surface of the anode side rib and the side surface of the cathode side rib of the corresponding cathode side rib are on the same cylindrical surface; the central column is provided with a central column top surface, a central column release groove and an oxygen main flow channel, the central column release groove is formed in the central column top surface, the oxygen main flow channel is a concentric through hole in the central column, and the oxygen main flow channel penetrates through the whole bipolar plate; the oxygen intake groove is provided with an oxygen intake groove bottom surface, an oxygen intake groove side surface and an oxygen intake groove release opening, all the oxygen intake groove side surfaces are superposed with the same cylindrical surface, the diameter of the cylindrical surface is equal to the outer diameter of the central column, and the oxygen intake groove release opening is a gap which is opened towards the outer side direction of the oxygen intake groove side surface on the basis of the oxygen intake groove side surface; an anode side flow field is formed between the anode side semicircular rib plates; and a cathode side flow field is formed between the cathode side quarter-circle-shaped rib plates.
When two or more than two bipolar plates are used for forming a stack, a membrane electrode is required to be placed between every two bipolar plates, the bottom surface of the membrane electrode is superposed with the first step surface, and the top surface of the membrane electrode is superposed with the second step surface; the maximum inner wall of the anode side of the bipolar plate is superposed with the outer wall of the cathode side of the bipolar plate; the top surface of the central column is superposed with the bottom surface of the oxygen inlet groove, and the outer wall of the central column is superposed with the side surface of the oxygen inlet groove; the oxygen main flow channels of the bipolar plates are connected with each other, and the hydrogen main flow channels of the bipolar plates are connected with each other; the central column release groove and the release port of the oxygen inlet groove are positioned at the same position, and the oxygen main flow passage of the central column can be communicated with the release port of the oxygen inlet groove through the central column release groove; the oxygen outlet on the anode side of the bipolar plate is connected with the corresponding oxygen outlet on the cathode side of the bipolar plate; the cathode side flow field and the corresponding anode side flow field are correspondingly overlapped in the vertical direction to form a plurality of annular reaction flow fields; the center of the membrane electrode is provided with a through hole, the diameter of the through hole is the same as the outer diameter of the center post, and the center post penetrates through the through hole in the center of the membrane electrode.
The superposition position of the maximum inner wall of the anode side of the bipolar plate and the outer wall of the cathode side of the bipolar plate realizes sealing in an interference fit mode.
The invention has the advantages that: the anode plate and the cathode plate are integrated together, so that the electric pile is convenient to assemble. And the structure of a central column release groove, an oxygen main flow channel, a hydrogen main flow channel, an oxygen inlet groove release port and the like is arranged, so that the problem that the gas is difficult to seal when the gas adopts central gas inlet can be solved.
Drawings
FIG. 1 is a schematic structural view of a pair of two bipolar plates according to the present invention;
FIG. 2 is a side bottom view of a bipolar plate of the present invention;
FIG. 3 is an enlarged view taken at A in FIG. 1;
FIG. 4 is an enlarged view at B in FIG. 2;
FIG. 5 is a side plan view of a bipolar plate of the present invention;
figure 6 is a top view of a bipolar plate of the present invention;
FIG. 7 is a cross-sectional view taken along line A-A of the present invention;
FIG. 8 is a cross-sectional view taken along line B-B of the present invention;
figure 9 is a bottom view of a bipolar plate of the present invention;
FIG. 10 is a cross-sectional view taken at C-C of the present invention;
FIG. 11 is an enlarged view at C of FIG. 10;
figure 12 is a right side view of a bipolar plate of the present invention;
figure 13 is an exploded view of two bipolar plate pairs according to the present invention;
figure 14 is a schematic view of a bipolar plate assembly stack of the present invention.
In the figure, 1, an anode side of a bipolar plate, 2, a cathode side of the bipolar plate, 3, a membrane electrode, 4, a first step face, 5, an oxygen outlet, 6, an anode side flow channel, 7, an anode side rib plate, 701, an anode side rib plate top face, 702, an anode side rib plate side face, 8, a center post, 801, a center post top face, 802, a center post release groove, 803, an oxygen main flow channel, 9, a hydrogen flow port, 10, a side boss, 11, a hydrogen main flow channel, 12, a second step face, 13, a cathode side flow channel, 14, a cathode side rib plate, 1401, a cathode side rib plate top face, 1402, a cathode side rib plate side face, 15, an oxygen intake groove, 1501, an oxygen intake groove bottom face, 1502, an oxygen intake groove side face, 1503, an oxygen intake groove release port, 16, a cathode side flow field, 17, and an anode side.
Detailed Description
A novel fuel cell integrated bipolar plate convenient for forming a galvanic pile comprises a bipolar plate anode side 1 and a bipolar plate cathode side 2; the anode side 1 of the bipolar plate and the cathode side 2 of the bipolar plate are combined together, and the maximum inner wall inner diameter of the anode side 1 of the bipolar plate is the same as the outer diameter of the cathode side 2 of the bipolar plate;
the anode side 1 of the bipolar plate is provided with a first step surface 4, an oxygen outlet 5, an anode side flow channel 6, an anode side ribbed plate 7, a central column 8, a hydrogen flow port 9, a side boss 10 and a hydrogen main flow channel 11, wherein the oxygen outlet 5 is a through hole positioned on the outer walls of the anode side 1 and the cathode side 2 of the bipolar plate, the lowest end of the oxygen outlet 5 of the anode side 1 of the bipolar plate is flush with the first step surface 4, the anode side ribbed plate 7 is annularly arranged on the anode side flow channel 6, the central column 8 is positioned at the central position of the anode side flow channel 6, the hydrogen flow port 9 is positioned on the inner wall of the anode side 1 of the bipolar plate, and the hydrogen flow port 9 is connected with the hydrogen main flow channel 11 inside the bipolar plate;
the cathode side 2 of the bipolar plate is provided with a second step surface 12, an oxygen outlet 5, a cathode side flow channel 13, a cathode side rib plate 14 and an oxygen inlet groove 15, the lowest end of the oxygen outlet 5 of the cathode side 2 of the bipolar plate is flush with the second step surface 12, the cathode side rib plate 14 is annularly arranged on the cathode side flow channel 13, and the oxygen inlet groove 15 is positioned at the center of the cathode side flow channel 13;
the anode side rib 7 is a semicircular ring structure, and has an anode side rib top surface 701 and an anode side rib side surface 702, the anode side rib top surface 701 and the first step surface 4 are on the same plane, and the area between all the anode side rib side surfaces 702 forms an anode flow channel; the cathode side rib 14 is a quarter ring structure, and has a cathode side rib top surface 1401 and a cathode side rib side surface 1402, the cathode side rib top surface 1401 and the second step surface 12 are on a plane, and the region between all the cathode side rib side surfaces 1402 forms a cathode flow channel;
the anode-side rib side 702 of the anode-side rib 7 is on the same cylindrical surface as the cathode-side rib side 1402 of the corresponding cathode-side rib 14;
the central column 8 is provided with a central column top surface 801, a central column release groove 802 and an oxygen main flow channel 803, wherein the central column release groove 802 is formed in the central column top surface 801, the oxygen main flow channel 803 is a concentric through hole in the central column 8, and the oxygen main flow channel 803 penetrates through the whole bipolar plate; the oxygen inlet groove 15 is provided with an oxygen inlet groove bottom surface 1501, an oxygen inlet groove side surface 1502 and an oxygen inlet groove release opening 1503, wherein all the oxygen inlet groove side surfaces 1502 are overlapped with the same cylindrical surface, the diameter of the cylindrical surface is equal to the outer diameter of the center column 8, and the oxygen inlet groove release opening 1503 is a notch which is opened towards the outer side direction of the oxygen inlet groove side surface 1502 on the basis of the oxygen inlet groove side surface 1502.
An anode side flow field 17 is formed between the anode side semicircular rib plates 7; the cathode side quarter-circular ribs 14 form a cathode side flow field 16 therebetween.
When two or more than two bipolar plates form a galvanic pile, a membrane electrode 3 needs to be placed between every two continuous bipolar plates, the bottom surface of the membrane electrode 3 is superposed with the first step surface 4, and the top surface of the membrane electrode 3 is superposed with the second step surface 12; the maximum inner wall of the anode side of the bipolar plate is superposed with the outer wall of the cathode side of the bipolar plate; the top surface 801 of the center column coincides with the bottom surface 1501 of the oxygen inlet tank, and the outer wall of the center column 8 coincides with the side surface 1502 of the oxygen inlet tank; the oxygen main flow channels 803 of the bipolar plates are connected with each other, and the hydrogen main flow channels 11 of the bipolar plates are connected with each other; the central column release slot 802 and the oxygen inlet slot release opening 1503 are positioned at the same position, and the oxygen main flow passage 803 of the central column 8 can be communicated with the oxygen inlet slot release opening 1503 through the central column release slot 802; the oxygen outlets 5 on the anode side 1 of the bipolar plate are interconnected with the corresponding oxygen outlets 5 on the cathode side 2 of the bipolar plate; the cathode side flow field 16 and the corresponding anode side flow field 17 are correspondingly overlapped in the vertical direction to form a plurality of annular reaction flow fields; the center of the membrane electrode 3 is provided with a through hole, the diameter of the through hole is the same as the outer diameter of the central column 8, and the central column 8 penetrates through the through hole in the center of the membrane electrode 3.
The superposition position of the maximum inner wall of the anode side 1 of the bipolar plate and the outer wall of the cathode side 2 of the bipolar plate is sealed in an interference fit mode.
When the bipolar plate provided by the invention is used for forming a galvanic pile, the oxygen main flow channel 803 is connected with an external oxygen source, and the hydrogen main flow channel 11 is connected with an external hydrogen source; oxygen enters a communication space formed by the central column release groove 802 and the oxygen inlet groove release port 1503 through the oxygen main flow channel 803, and then is diffused to the cathode side flow field 16 through a lower flow field channel formed by the cathode side rib plate side 1402; hydrogen enters the hydrogen flow port 9 through the hydrogen main flow passage 11, and then diffuses to the anode side flow field 17 through an upper flow field passage formed by the side surface 702 of the anode side rib plate; oxygen in the cathode side flow field 16 and hydrogen in the anode side flow field 17 react through the membrane electrode 3, and water generated by the reaction is discharged from the oxygen outlet 5 along with oxygen left by the reaction. As shown in fig. 14, the bipolar plate provided by the invention can be conveniently assembled into a galvanic pile, is suitable for assembly line and rapid production and assembly, and meets the production practice.
Variations, modifications, substitutions and alterations of the embodiments, which will occur to those skilled in the art and which are described in the specification and illustrated in the accompanying drawings, may be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A novel fuel cell integrated bipolar plate convenient for forming an electric stack comprises a bipolar plate anode side and a bipolar plate cathode side, and is characterized in that: the anode side of the bipolar plate and the cathode side of the bipolar plate are combined together, and the maximum inner wall inner diameter of the anode side of the bipolar plate is the same as the outer diameter of the cathode side of the bipolar plate;
the anode side of the bipolar plate is provided with a first step surface, an oxygen outlet, an anode side flow channel, anode side ribbed plates, a central column, a hydrogen flow port, a side boss and a hydrogen main flow channel, wherein the oxygen outlet is a through hole positioned on the outer walls of the anode side and the cathode side of the bipolar plate, the lowest end of the oxygen outlet on the anode side of the bipolar plate is positioned on the upper side of the first step surface, the anode side ribbed plates are annularly arranged on the anode side of the bipolar plate, the central column is positioned in the center of the anode side flow channel, the hydrogen flow port is positioned on the inner wall of the anode side of the bipolar plate, and the hydrogen flow port is connected with the hydrogen main flow channel inside the bipolar plate;
the cathode side of the bipolar plate is provided with a second step surface, an oxygen outlet, a cathode side flow channel, a cathode side ribbed plate and an oxygen inlet groove, the lowest end of the oxygen outlet on the cathode side of the bipolar plate is flush with the second step surface, the cathode side ribbed plate is annularly arranged on the cathode side of the bipolar plate, and the oxygen inlet groove is positioned in the center of the cathode side flow channel;
the anode side rib plate is of a semicircular annular structure and is provided with an anode side rib plate top surface and an anode side rib plate side surface, and the anode side rib plate top surface and the first step surface are on the same plane; the cathode side rib plate is of a quarter-ring-shaped structure and is provided with a cathode side rib plate top surface and a cathode side rib plate side surface, and the cathode side rib plate top surface and the second step surface are on the same plane.
2. A novel fuel cell integrated bipolar plate for facilitating the formation of a stack, as claimed in claim 1, wherein: the side of the anode side rib and the side of the cathode side rib of the corresponding cathode side rib are on the same cylindrical surface;
the central column is provided with a central column top surface, a central column release groove and an oxygen main flow channel, the central column release groove is formed in the central column top surface, the oxygen main flow channel is a concentric through hole in the central column, and the oxygen main flow channel penetrates through the whole bipolar plate; the oxygen intake groove is provided with an oxygen intake groove bottom surface, an oxygen intake groove side surface and an oxygen intake groove release opening, all the oxygen intake groove side surfaces are superposed with the same cylindrical surface, the diameter of the cylindrical surface is equal to the outer diameter of the central column, and the oxygen intake groove release opening is an opening towards the outer side direction of the oxygen intake groove side surface on the basis of the oxygen intake groove side surface.
3. A novel fuel cell integrated bipolar plate for facilitating the formation of a stack, as claimed in claim 1, wherein: an anode side flow field is formed between the anode side ribbed plates; and a cathode side flow field is formed between the cathode side rib plates.
4. A novel fuel cell integrated bipolar plate for facilitating the formation of a stack, as claimed in claim 3, wherein: when two or more than two bipolar plates form a galvanic pile, a membrane electrode is required to be placed between every two continuous bipolar plates, the bottom surface of the membrane electrode is superposed with the first step surface, and the top surface of the membrane electrode is superposed with the second step surface; the maximum inner wall of the anode side of the bipolar plate is superposed with the outer wall of the cathode side of the bipolar plate; the top surface of the central column is superposed with the bottom surface of the oxygen inlet groove, and the outer wall of the central column is superposed with the side surface of the oxygen inlet groove; the oxygen main flow channels of the bipolar plates are connected with each other, and the hydrogen main flow channels of the bipolar plates are connected with each other; the central column release groove and the release port of the oxygen inlet groove are positioned at the same position, and the oxygen main flow passage of the central column can be communicated with the release port of the oxygen inlet groove through the central column release groove; the oxygen outlet on the anode side of the bipolar plate is connected with the corresponding oxygen outlet on the cathode side of the bipolar plate; the cathode side flow field and the corresponding anode side flow field are correspondingly overlapped in the vertical direction to form a plurality of annular reaction flow fields; the center of the membrane electrode is provided with a through hole, the diameter of the through hole is the same as the outer diameter of the center post, and the center post penetrates through the through hole in the center of the membrane electrode.
5. A novel fuel cell integrated bipolar plate for facilitating the formation of a stack, as claimed in claim 1, wherein: the superposition position of the maximum inner wall of the anode side of the bipolar plate and the outer wall of the cathode side of the bipolar plate realizes sealing in an interference fit mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220583390.XU CN217361652U (en) | 2022-03-15 | 2022-03-15 | Novel fuel cell integrated bipolar plate convenient for forming electric pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220583390.XU CN217361652U (en) | 2022-03-15 | 2022-03-15 | Novel fuel cell integrated bipolar plate convenient for forming electric pile |
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| Publication Number | Publication Date |
|---|---|
| CN217361652U true CN217361652U (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220583390.XU Expired - Fee Related CN217361652U (en) | 2022-03-15 | 2022-03-15 | Novel fuel cell integrated bipolar plate convenient for forming electric pile |
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| Country | Link |
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| CN (1) | CN217361652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115332558A (en) * | 2022-10-11 | 2022-11-11 | 上海治臻新能源股份有限公司 | Fuel cell |
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2022
- 2022-03-15 CN CN202220583390.XU patent/CN217361652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115332558A (en) * | 2022-10-11 | 2022-11-11 | 上海治臻新能源股份有限公司 | Fuel cell |
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| GR01 | Patent grant | ||
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Granted publication date: 20220902 |