CN218069922U - Hydrogen-oxygen fuel cell, temperature control system and mobile power supply - Google Patents
Hydrogen-oxygen fuel cell, temperature control system and mobile power supply Download PDFInfo
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- CN218069922U CN218069922U CN202221326382.3U CN202221326382U CN218069922U CN 218069922 U CN218069922 U CN 218069922U CN 202221326382 U CN202221326382 U CN 202221326382U CN 218069922 U CN218069922 U CN 218069922U
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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
The application discloses a hydrogen-oxygen fuel cell, a temperature control system and a mobile power supply, aiming at solving the problems of unstable voltage and current output caused by factors such as uneven charge generation of a catalyst layer, poor heat conductivity of a bipolar plate and a power taking plate, inaccurate temperature control and the like; the hydrogen-oxygen fuel cell comprises a first metal plate, a first electricity taking plate, a first graphite electrode plate, a proton exchange membrane, a second graphite electrode plate, a second electricity taking plate and a second metal plate; the first metal plate is provided with a hydrogen inlet and a reacted gas outlet; a cathode catalyst layer and an anode catalyst layer are respectively arranged on two sides of the proton exchange membrane, and the first graphite electrode plate and the second graphite electrode plate form a bipolar plate for clamping the cathode catalyst layer, the proton exchange membrane and the anode catalyst layer; the second electricity taking plate is attached to the second graphite electrode plate; the second metal plate is provided with an oxygen inlet and an air outlet; the utility model provides a shortcoming of oxyhydrogen fuel cell in the past, formed stable voltage current output device.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to an oxyhydrogen fuel cell, a temperature control system and a mobile power supply.
Background
The hydrogen-oxygen fuel cell is a chemical device that directly converts chemical energy stored in hydrogen fuel and oxygen into electric energy, and is a fifth generation fuel cell that rapidly develops following alkaline fuel cells, phosphoric acid type fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. Efficient and clean hydrogen energy is widely researched and is used as an energy strategic key item for fuel cell development. When the hydrogen-oxygen fuel cell works, hydrogen is introduced into the anode plate, the hydrogen reaches the surface of the catalyst through the gas diffusion layer and is ionized into hydrogen ions and electrons through electrochemical reaction, the electrons reach the cathode through the external circuit, and the hydrogen ions reach the cathode through the proton exchange membrane. Introducing oxygen into the negative plate; oxygen passes through the gas diffusion layer to reach the surface of the catalyst and reacts with the electron proton electrochemically to generate water. Therefore, the product of the hydrogen-oxygen fuel cell only contains water, does not pollute the environment, and is an ideal scientific technology favored by the modern times.
Some problems with current hydrogen-oxygen fuel cells include:
1. the uneven distribution of hydrogen and oxygen in the electrode plate gas flow results in uneven distribution of the electric charge generated on the surface of the catalyst.
2. The electrode plate has a thick structure, and the heat conduction effect of the electrode plate is difficult to control, so that the temperature control is not accurate, and the efficiency of the whole battery is reduced.
3. Due to the thick and heavy structural design, a multilayer galvanic pile form is difficult to realize, and accurate voltage supply cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of nonuniform charge generation and poor heat conduction performance, the application provides an oxyhydrogen fuel cell, a temperature control system and a mobile power supply.
The hydrogen-oxygen fuel cell provided by the first aspect of the application adopts the following technical scheme:
a hydrogen-oxygen fuel cell comprises a first metal plate, a first electricity taking plate, a first graphite electrode plate, a proton exchange membrane, a second graphite electrode plate, a second electricity taking plate and a second metal plate; the first metal plate is provided with a hydrogen inlet connected with a hydrogen supply device and an outlet connected with a reacted gas recovery device; the first electricity taking plate is attached to one side, far away from the hydrogen inlet, of the first metal plate;
the first graphite electrode plate is attached to one side, away from the first metal plate, of the first electricity taking plate; a cathode catalyst layer is attached to one side of the proton exchange membrane, an anode catalyst layer is attached to the other side of the proton exchange membrane, and the first graphite electrode plate and the second graphite electrode plate form a bipolar plate for clamping the proton exchange membrane, the cathode catalyst layer and the anode catalyst layer;
the second electricity taking plate is attached to one side, away from the proton exchange membrane, of the second graphite electrode plate; the second metal plate is attached to one side, away from the second graphite electrode plate, of the second electricity taking plate; the second metal plate is provided with an oxygen inlet and an air outlet.
Through adopting above-mentioned technical scheme, heat conduction efficiency is high, can make the temperature of corresponding catalyst layer remain stable to can produce even electric charge.
Preferably, the device further comprises a first connecting component and a second connecting component;
the first connecting assembly comprises a first connecting piece and a first fixing piece, and the free end of the first connecting piece sequentially penetrates through the first metal plate, the first electricity taking plate, the first graphite electrode plate, the proton exchange membrane, the second graphite electrode plate, the second electricity taking plate and the second metal plate in a hanging and extending mode; the first fixing piece is arranged at the overhanging end of the first connecting piece to tightly abut against the second metal plate;
the second connecting assembly comprises a second connecting piece and a second fixing piece, and the free end of the second connecting piece sequentially penetrates through the first metal plate and the second metal plate in an overhanging manner; the second fixing piece is arranged at the overhanging end of the second connecting piece to tightly abut against the second metal plate.
Through adopting above-mentioned technical scheme, it is fixed through adopting one to wear the corresponding connecting piece to the end promptly, can produce certain pressure, effectively improve the leakproofness.
Preferably, the first graphite electrode plate is provided with a first air inlet and a first air outlet;
a first serpentine groove flow channel is formed in one side, away from the first electricity taking plate, of the first graphite electrode plate, the inlet end of the first serpentine groove flow channel is communicated with the first air inlet, and the outlet end of the first serpentine groove flow channel is communicated with the first air outlet;
the second graphite electrode plate is provided with a second air inlet and a second air outlet;
and a second snake-shaped groove flow channel is formed in one side, away from the second electricity taking plate, of the second graphite electrode plate, the inlet end of the second snake-shaped groove flow channel is communicated with the second air inlet, and the outlet end of the second snake-shaped groove flow channel is communicated with the second air outlet.
Through adopting above-mentioned technical scheme, through the setting to the corresponding snakelike recess runner of catalyst layer that corresponds, increase and the contact homogeneity that corresponds the catalyst layer do benefit to and produce even electric charge.
Preferably, the first serpentine groove flow channel is disposed in the middle of the first graphite electrode plate;
the second serpentine groove flow channel is arranged in the middle of the second graphite electrode plate.
By adopting the technical scheme, the catalyst layer is fully contacted with the cathode catalyst layer and the anode catalyst layer, so that the temperature is kept more stable; meanwhile, the arrangement of the first serpentine groove runner and the second serpentine groove runner enables hydrogen and oxygen to be uniformly distributed in the whole panel in contact with the corresponding catalyst layer, and uniform electric charges are effectively guaranteed to be generated.
Preferably, the first air inlet is disposed below the first air outlet;
the second air inlet is arranged below the second air outlet.
By adopting the technical scheme, the gas flow distribution of hydrogen and oxygen at the corresponding electrode plate is ensured to be more uniform, so that the electric charges generated on the surface of the corresponding catalyst layer are uniformly distributed.
Preferably, the structure of the first metal plate is the same as the structure of the second metal plate;
the widths of the first electricity taking plate, the first graphite electrode plate, the proton exchange membrane, the second graphite electrode plate and the second electricity taking plate are all smaller than the width of the first metal plate.
Through adopting above-mentioned technical scheme, make overall structure compacter, the leakproofness is better.
The second aspect of the present application provides a temperature control system that adopts the following technical solution:
a temperature control system comprises a master control center, a temperature adjusting device, a temperature detecting device and the hydrogen-oxygen fuel cell, wherein the temperature adjusting device and the temperature detecting device are in signal connection with the master control center;
and the master control center controls the temperature adjusting device and the hydrogen-oxygen fuel cell to regulate and control the preset temperature based on the temperature information acquired by the temperature detecting device.
By adopting the technical scheme, the accurate temperature control of the system can be realized.
The third aspect of the present application provides a mobile power supply that adopts the following technical solution:
a mobile power supply comprises a plurality of hydrogen-oxygen fuel cells, and the hydrogen-oxygen fuel cells are stacked.
By adopting the technical scheme, the problems that oxyhydrogen gas flow is not uniformly distributed and large-scale production of the galvanic pile is difficult to form are effectively solved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the first graphite electrode plate and the second graphite electrode plate form a bipolar plate for clamping the proton exchange membrane, the cathode catalyst layer and the anode catalyst layer, the heat conduction effect is good, and the temperature of the corresponding catalyst layer in contact is kept stable, so that uniform electric charges are generated.
2. The serpentine groove flow channel arrangement on the opposite sides of the first graphite electrode plate and the second graphite electrode plate further improves the uniform contact between oxyhydrogen gas flow and the catalyst layer on the corresponding side, and is further beneficial to generating uniform electric charges.
3. The ultrathin arrangement of the first graphite electrode plate, the second graphite electrode plate, the first electricity taking plate and the second electricity taking plate is beneficial to leading out electric charges generated on the surface of the catalyst layer from the surface of the catalyst to form stable voltage and current through an external circuit.
4. The whole device is fixed by a connecting piece penetrating to the bottom, so that the whole sealing performance is greatly improved.
5. The temperature control system that this application second aspect provided adopts the thermostatic oven accuse temperature, can realize room temperature to 800 ℃ accurate accuse temperature on a large scale, can regard as accurate test platform to carry out catalyst activity evaluation, can obtain stable, effectual data.
6. The portable power source provided by the third aspect of the application can effectively solve the problems that oxyhydrogen gas flow is not uniformly distributed, temperature control is not accurate, and large-scale production of galvanic piles is difficult to form.
Drawings
Figure 1 is an exploded schematic view of a hydrogen-oxygen fuel cell in the present application.
Fig. 2 is an assembled schematic view of fig. 1.
Fig. 3 is a schematic structural view of the second graphite electrode plate in fig. 1.
Fig. 4 is a schematic diagram of one embodiment of a mobile power supply in the present application.
Description of reference numerals: 10. a first metal plate; 11. a hydrogen inlet; 12. a gas outlet after the reaction; 20. a first power take-off plate; 30. a first graphite electrode plate; 40. a proton exchange membrane; 50. a second graphite electrode plate; 51. an oxygen inlet; 52. a second serpentine groove flow channel; 53. a gas outlet after the reaction; 60. a second power take-off plate; 70. a second metal plate; 80. a cathode catalyst layer; 90. an anode catalyst layer; 100. a first connection assembly; 200. a second connection assembly; 300. and an end plate.
Detailed Description
The present application is described in further detail below with reference to fig. 1-3.
The application discloses oxyhydrogen fuel cell, temperature control system, portable power source.
Referring to fig. 1 and 2, a first aspect of the present application discloses a hydrogen-oxygen fuel cell including a first metal plate 10, a first electricity-taking plate 20, a first graphite electrode plate 30, a proton exchange membrane 40, a second graphite electrode plate 50, a second electricity-taking plate 60, a second metal plate 70, a first connection assembly 100, and a second connection assembly 200; wherein, one side of the proton exchange membrane 40 is provided with a cathode catalyst layer 80 in an attaching way, and the other side is provided with an anode catalyst layer 90 in an attaching way; through the arrangement of the first connecting component 100 and the second connecting component 200, the complete set of device is fixed to the bottom so as to generate certain pressure and effectively ensure the sealing property.
Specifically, the first connection assembly 100 includes a first connection member and a first fixing member, and a free end of the first connection member sequentially penetrates through the first metal plate 10, the first electricity taking plate 20, the first graphite electrode plate 30, the proton exchange membrane 40, the second graphite electrode plate 50, the second electricity taking plate 60, and the second metal plate 70 to be suspended; the first fixing member is disposed at the overhanging end of the first connecting member to abut against the second metal plate 70; in the present embodiment, the first connecting members 100 are provided in two, and two first connecting members 100 are respectively provided in the upper and lower regions to ensure clamping of the respective members.
The second connecting assembly 200 comprises a second connecting piece and a second fixing piece, and the free end of the second connecting piece sequentially penetrates through the first metal plate 10 and the second metal plate 70 to be arranged in an overhanging manner; the second fixing member is disposed at the overhanging end of the second connecting member to abut against the second metal plate 70; in this embodiment, two rows of the second connecting assemblies 200 are provided, and three rows of the second connecting assemblies are provided, so as to clamp the first metal plate 10 and the second metal plate 70, thereby further improving the sealing performance between the internal assemblies.
This application is fixed through adopting one to wear the corresponding connecting piece to the end, can effectively improve the leakproofness.
Specifically, the first metal plate 10 is provided with a hydrogen inlet 11 and a reacted gas outlet 12, wherein the hydrogen inlet 11 is used for connecting with a hydrogen supply device; and the gas outlet 12 conveys redundant hydrogen to a hydrogen recovery device after reaction, so that the utilization rate of the hydrogen is improved.
The first electricity collecting plate 20 is attached to one side of the first metal plate 10 away from the hydrogen inlet 11, in this embodiment, the right side of the first metal plate 10.
The first graphite electrode plate 30 is attached to one side of the first current collecting plate 20 away from the first metal plate 10, in this embodiment, the right side of the first current collecting plate 20.
Further, the first graphite electrode plate 30 is provided with a first air inlet and a first air outlet; a first serpentine groove flow channel is formed in one side of the first graphite electrode plate 30, which is far away from the first electricity taking plate 20, an inlet end of the first serpentine groove flow channel is communicated with the first air inlet, and an outlet end of the first serpentine groove flow channel is communicated with the first air outlet.
The first graphite electrode plate 30 and the second graphite electrode plate 50 constitute a bipolar plate clamping the proton exchange membrane 40, the cathode catalyst layer 80, and the anode catalyst layer 90.
The second electricity-taking plate 60 is attached to a side of the second graphite electrode plate 50 away from the proton exchange membrane 40, in this embodiment, a right side of the second graphite electrode plate 50.
The second metal plate 70 is attached to a side of the second current collecting plate 60 away from the second graphite electrode plate 50, in this embodiment, a right side of the second current collecting plate 60.
The second metal plate 70 is provided with an oxygen inlet and an air outlet.
Specifically, the first current collecting plate 20, the first graphite electrode plate 30, the second graphite electrode plate 50, the second current collecting plate 60, and the second metal plate 70 are further provided with through holes for the first connecting members to pass through.
Further referring to fig. 2, a specific structure of the second graphite electrode plate 50 will be described as an example.
The second graphite electrode plate 50 is provided with a second air inlet 51 and a second air outlet 53; a second serpentine groove flow channel 52 is formed in a side of the second graphite electrode plate 50 away from the second electricity taking plate 60, an inlet end of the second serpentine groove flow channel 52 is communicated with the second air inlet 51, and an outlet end of the second serpentine groove flow channel is communicated with the second air outlet 53.
Through the arrangement of the first serpentine groove flow channel and the second serpentine groove flow channel 52, the transmission is more uniform, the contact uniformity of the catalyst layer is increased, and uniform electric charges are generated.
In a preferred embodiment of the present application, a first serpentine groove flow channel is disposed intermediate the first graphite electrode plate 30; a second serpentine groove flow channel 52 is disposed intermediate the second graphite electrode plate 50.
By adopting the technical scheme, the catalyst layer is fully contacted with the cathode catalyst layer 80 and the anode catalyst layer 90, so that the temperature is kept more stable; meanwhile, the arrangement of the first serpentine groove flow channel and the second serpentine groove flow channel 52 enables the hydrogen and the oxygen to be uniformly distributed in the whole panel contacting with the corresponding catalyst layer, thereby effectively ensuring that uniform electric charges are generated.
Through the ultra-thin setting of first graphite electrode board 30, second graphite electrode board 50, effectively improve the heat conduction effect.
The first air inlet is arranged below the first air outlet; the second gas inlet 51 is disposed below the second gas outlet 53, so as to ensure that the gas flow distribution of hydrogen and oxygen at the corresponding electrode plate is more uniform, so that the charges generated on the surface of the corresponding catalyst layer are uniformly distributed.
Preferably, the structure of the first metal plate 10 is the same as that of the second metal plate 70.
Preferably, the widths of the first current-collecting plate 20, the first graphite electrode plate 30, the proton exchange membrane 40, the second graphite electrode plate 50 and the second current-collecting plate 60 are all smaller than the width of the first metal plate 10, so that the whole structure is more compact and the sealing performance is better.
Due to the ultrathin structure of the first electricity taking plate 20 and the second electricity taking plate 60, the voltage and current generated by an external circuit can be led out from the corresponding surface of the catalyst layer.
The implementation principle of the hydrogen-oxygen fuel cell in the embodiment of the application is as follows: hydrogen is introduced into the anode plate, the hydrogen reaches the surface of the catalyst layer through the gas diffusion layer and is ionized into hydrogen ions and electrons through electrochemical reaction, the electrons reach the cathode through an external circuit, the hydrogen ions reach the cathode through the proton exchange membrane 40, and oxygen is introduced into the cathode plate; oxygen passes through the gas diffusion layer to reach the surface of the catalyst and generate electrochemical reaction with the electron protons to generate water; according to the scheme disclosed by the application, the catalyst layers (namely the proton exchange membrane 40, the cathode catalyst layer 80 and the anode catalyst layer 90) of the central proton exchange membrane 40 are clamped by the ultrathin bipolar plate made of graphite, and the central position of the bipolar plate is provided with a corresponding snake-shaped flow channel groove with a fine structure; the graphite material does benefit to heat conduction and makes the temperature of contacting the catalyst remain stable, and snakelike runner recess is evenly distributed with hydrogen and oxygen in whole panel that contacts with the catalyst layer, does benefit to the even electric charge that produces.
The second aspect of the application provides a temperature control system, which comprises a master control center, a temperature adjusting device, a temperature detecting device and the hydrogen-oxygen fuel cell, wherein the temperature adjusting device and the temperature detecting device are in signal connection with the master control center; the master control center controls the temperature adjusting device and the hydrogen-oxygen fuel cell to regulate and control the preset temperature based on the temperature information acquired by the temperature detection device, so that the accurate temperature control of the system is realized.
Referring to fig. 4, a third aspect of the present application provides a mobile power supply, which includes a plurality of hydrogen-oxygen fuel cells, wherein the hydrogen-oxygen fuel cells are stacked to form a stack, and end plates 300 are respectively disposed at two ends of the stack to clamp the stack, so as to realize scale production of the stack.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A hydrogen-oxygen fuel cell, characterized by: comprises a first metal plate (10), a first electricity taking plate (20), a first graphite electrode plate (30), a proton exchange membrane (40), a second graphite electrode plate (50), a second electricity taking plate (60) and a second metal plate (70);
the first metal plate (10) is provided with a hydrogen inlet (11) connected with a hydrogen supply device and a reacted gas outlet (12) connected with a reacted gas recovery device; the first electricity taking plate (20) is attached to one side, away from the hydrogen inlet (11), of the first metal plate (10);
the first graphite electrode plate (30) is attached to one side, away from the first metal plate (10), of the first electricity taking plate (20); a cathode catalyst layer (80) is attached to one side of the proton exchange membrane (40), an anode catalyst layer (90) is attached to the other side of the proton exchange membrane, and the first graphite electrode plate (30) and the second graphite electrode plate (50) form a bipolar plate for clamping the proton exchange membrane (40), the cathode catalyst layer (80) and the anode catalyst layer (90);
the second electricity taking plate (60) is attached to one side, away from the proton exchange membrane (40), of the second graphite electrode plate (50); the second metal plate (70) is attached to one side, away from the second graphite electrode plate (50), of the second electricity taking plate (60); the second metal plate (70) is provided with an oxygen inlet and an air outlet.
2. The hydrogen-oxygen fuel cell according to claim 1, characterized in that: further comprising a first connection assembly (100) and a second connection assembly (200);
the first connecting assembly (100) comprises a first connecting piece and a first fixing piece, and the free end of the first connecting piece sequentially penetrates through the first metal plate (10), the first electricity taking plate (20), the first graphite electrode plate (30), the proton exchange membrane (40), the second graphite electrode plate (50), the second electricity taking plate (60) and the second metal plate (70) to be arranged in an overhanging manner; the first fixing piece is arranged at the overhanging end of the first connecting piece to tightly abut against the second metal plate (70);
the second connecting assembly (200) comprises a second connecting piece and a second fixing piece, and the free end of the second connecting piece sequentially penetrates through the first metal plate (10) and the second metal plate (70) to be arranged in an overhanging manner; the second fixing piece is arranged at the overhanging end of the second connecting piece to tightly abut against the second metal plate (70).
3. The hydrogen-oxygen fuel cell according to claim 2, characterized in that: the first graphite electrode plate (30) is provided with a first air inlet and a first air outlet;
a first serpentine groove flow channel is formed in one side, away from the first electricity taking plate (20), of the first graphite electrode plate (30), the inlet end of the first serpentine groove flow channel is communicated with the first air inlet, and the outlet end of the first serpentine groove flow channel is communicated with the first air outlet;
the second graphite electrode plate (50) is provided with a second air inlet (51) and a second air outlet (53);
and a second snake-shaped groove flow channel (52) is formed in one side, away from the second electricity taking plate (60), of the second graphite electrode plate (50), the inlet end of the second snake-shaped groove flow channel (52) is communicated with the second air inlet (51), and the outlet end of the second snake-shaped groove flow channel is communicated with the second air outlet (53).
4. The hydrogen-oxygen fuel cell according to claim 3, characterized in that: the first serpentine groove flow channel is arranged in the middle of the first graphite electrode plate (30);
the second serpentine groove flow channel (52) is disposed in the middle of the second graphite electrode plate (50).
5. The hydrogen-oxygen fuel cell according to claim 3, characterized in that: the first air inlet is arranged below the first air outlet;
the second air inlet (51) is arranged below the second air outlet (53).
6. The hydrogen-oxygen fuel cell according to claim 1, characterized in that: the structure of the first metal plate (10) is the same as that of the second metal plate (70);
the widths of the first electricity taking plate (20), the first graphite electrode plate (30), the proton exchange membrane (40), the second graphite electrode plate (50) and the second electricity taking plate (60) are all smaller than the width of the first metal plate (10).
7. A temperature control system is characterized in that: the system comprises a master control center, a temperature adjusting device, a temperature detecting device and the hydrogen-oxygen fuel cell of any one of claims 1 to 6, wherein the temperature adjusting device and the temperature detecting device are in signal connection with the master control center;
and the master control center controls the temperature adjusting device and the hydrogen-oxygen fuel cell to regulate and control the preset temperature based on the temperature information acquired by the temperature detecting device.
8. A mobile power supply, characterized in that: comprising a plurality of hydrogen-oxygen fuel cells according to any one of claims 1 to 6, a plurality of said hydrogen-oxygen fuel cells being arranged in a stack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221326382.3U CN218069922U (en) | 2022-05-28 | 2022-05-28 | Hydrogen-oxygen fuel cell, temperature control system and mobile power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221326382.3U CN218069922U (en) | 2022-05-28 | 2022-05-28 | Hydrogen-oxygen fuel cell, temperature control system and mobile power supply |
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| CN218069922U true CN218069922U (en) | 2022-12-16 |
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| CN202221326382.3U Active CN218069922U (en) | 2022-05-28 | 2022-05-28 | Hydrogen-oxygen fuel cell, temperature control system and mobile power supply |
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