CN218827272U - Pressure stabilizer of fuel cell hydrogen system, fuel cell and vehicle - Google Patents
Pressure stabilizer of fuel cell hydrogen system, fuel cell and vehicle Download PDFInfo
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- CN218827272U CN218827272U CN202222269422.1U CN202222269422U CN218827272U CN 218827272 U CN218827272 U CN 218827272U CN 202222269422 U CN202222269422 U CN 202222269422U CN 218827272 U CN218827272 U CN 218827272U
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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 provides a voltage regulator device, fuel cell and vehicle of fuel cell hydrogen system, and the hydrogen system includes the galvanic pile, advances hydrogen manifold and goes out the hydrogen manifold, and voltage regulator device includes: the hydrogen inlet pressure stabilizing cavity is connected with the hydrogen inlet manifold and the inlet of the electric pile; the hydrogen outlet pressure stabilizing cavity is connected with the hydrogen outlet manifold and the outlet of the electric pile, the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume, and compared with the prior art that the pressure stabilizing cavities are part of the hydrogen inlet manifold and the hydrogen outlet manifold, the volume of the pressure stabilizing cavity is greatly improved by arranging the independent pressure stabilizing cavities, the pressure fluctuation of the hydrogen of the electric pile is reduced to a certain extent, the hydrogen pressure stability at the inlet and the outlet of the electric pile is facilitated, and the problem of unstable hydrogen pressure of a fuel cell hydrogen system in the prior art is solved.
Description
Technical Field
The application relates to the technical field of fuel cells, in particular to a pressure stabilizing device of a fuel cell hydrogen system, a fuel cell and a vehicle.
Background
The proton exchange membrane fuel cell hydrogen system is an important subsystem, and how to ensure the stable pressure between the inlet and the outlet of the stack has great influence on the performance and the reliability of the stack. In addition, the control system can make correct judgment according to the acquired pressure signal only when the pressure is stable, so that a correct instruction is sent out. It is particularly important to stabilize the pressure of the hydrogen system within an allowable range.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The application mainly aims to provide a pressure stabilizing device of a fuel cell hydrogen system, a fuel cell and a vehicle, so as to solve the problem that the hydrogen pressure of the fuel cell hydrogen system in the prior art is unstable.
In order to achieve the above object, according to one aspect of the present application, there is provided a pressure stabilizing apparatus of a fuel cell hydrogen system including a stack, a hydrogen inlet manifold, and a hydrogen outlet manifold, the pressure stabilizing apparatus including: the hydrogen inlet pressure stabilizing cavity is connected with the hydrogen inlet manifold and the inlet of the electric pile; and the hydrogen outlet pressure stabilizing cavity is connected with the hydrogen outlet manifold and the outlet of the electric pile, and the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume.
Optionally, the voltage stabilizer further includes: and the hydrogen discharge valve is connected with an outlet of the galvanic pile and is used for discharging partial reacted hydrogen.
Optionally, the voltage stabilizer further includes: and the throttling port is connected with the hydrogen discharge valve and is used for reducing the flow of hydrogen discharged by the hydrogen discharge valve.
Optionally, the voltage stabilizer further includes: and the first pressure sensor is positioned in the hydrogen inlet pressure stabilizing cavity and is used for detecting the hydrogen pressure of the hydrogen inlet pressure stabilizing cavity.
Optionally, the voltage stabilizer further includes: the second pressure sensor is positioned in the hydrogen outlet pressure stabilizing cavity and is used for detecting the hydrogen pressure of the hydrogen outlet pressure stabilizing cavity; and the first pressure controller is in communication connection with the second pressure sensor and the hydrogen discharge valve, and is used for triggering the hydrogen discharge valve to discharge hydrogen when the pressure of the hydrogen in the hydrogen outlet pressure stabilizing cavity is greater than a preset pressure.
Optionally, the voltage stabilizer further includes: and the pressure regulating valve assembly is connected with the hydrogen inlet manifold and is used for regulating the hydrogen to a pressure set value and inputting the pressure set value into the hydrogen inlet manifold.
Optionally, the voltage stabilizer further includes: and the second pressure controller is in communication connection with the first pressure sensor and is used for adjusting a pressure set value according to the hydrogen pressure of the hydrogen inlet pressure stabilizing cavity.
Optionally, the voltage stabilizer further includes: the gas-water separator is connected with the hydrogen outlet manifold and is used for carrying out gas-water separation on the reacted hydrogen to obtain water and circulating hydrogen; and the hydrogen circulating pump is connected with the gas-water separator and the hydrogen inlet manifold and used for returning the circulating hydrogen to the hydrogen inlet manifold.
According to another aspect of the present application, there is provided a fuel cell including a hydrogen system and the pressure stabilizing device.
According to still another aspect of the present application, there is provided a vehicle including the fuel cell.
The technical scheme of the application, among the above-mentioned pressure stabilizer of fuel cell hydrogen system, above-mentioned pressure stabilizer sets up into hydrogen pressure stabilizing cavity between the entry of hydrogen inlet manifold and galvanic pile, set up out hydrogen pressure stabilizing cavity between the export of hydrogen outlet manifold and galvanic pile, and the volume of entering hydrogen pressure stabilizing cavity and the volume of going out hydrogen pressure stabilizing cavity all are greater than predetermined volume, compare in prior art pressure stabilizing cavity for hydrogen inlet manifold and a part of hydrogen outlet manifold, through setting up independent pressure stabilizing cavity, the volume of pressure stabilizing cavity has been promoted greatly, reduce galvanic pile hydrogen pressure fluctuation to a certain extent, be favorable to galvanic pile entry and exit hydrogen pressure stability, the unstable problem of hydrogen pressure of fuel cell hydrogen system among the prior art has been solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a schematic diagram of a pressure regulation device of a fuel cell hydrogen system according to an embodiment of the present application;
FIG. 2 shows a schematic diagram of a hydrogen inlet plenum or a hydrogen outlet plenum according to one embodiment of the present application;
FIG. 3 shows a schematic view of a choke according to an embodiment of the present application;
fig. 4 shows a schematic view of a connection structure of a throttle orifice and a hydrogen exhaust valve according to an embodiment of the present application.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
For convenience of description, some terms or expressions referred to in the embodiments of the present application are explained below:
a voltage stabilizing cavity: a cavity for stabilizing pressure by storing a certain working medium.
As described in the background of the invention, in order to solve the above-mentioned problems in the prior art in which the hydrogen pressure of the hydrogen system of the fuel cell is unstable, in an exemplary embodiment of the present application, a pressure stabilizing device of the hydrogen system of the fuel cell, and a vehicle are provided.
According to an embodiment of the present application, there is provided a pressure stabilizing apparatus of a hydrogen system of a fuel cell, as shown in fig. 1, the hydrogen system including a stack, a hydrogen inlet manifold and a hydrogen outlet manifold, the pressure stabilizing apparatus including:
a hydrogen inlet pressure stabilizing cavity connected with the hydrogen inlet manifold and the inlet of the electric pile;
in order to detect the hydrogen pressure at the inlet of the stack in real time, in an alternative embodiment, the pressure stabilizing device further includes a first pressure sensor, as shown in fig. 1, the first pressure sensor is located in the hydrogen inlet pressure stabilizing cavity, and the first pressure sensor is configured to detect the hydrogen pressure in the hydrogen inlet pressure stabilizing cavity.
In the embodiment, the first pressure sensor is arranged on the hydrogen inlet pressure stabilizing cavity, so that the hydrogen pressure of the hydrogen inlet pressure stabilizing cavity is detected in real time, the hydrogen pressure is conveniently and timely processed when abnormal, and safety accidents of the fuel cell are avoided.
In order to ensure the stability of the hydrogen pressure at the inlet of the stack, in an alternative embodiment, as shown in fig. 1, the pressure stabilizer further comprises a pressure regulating valve assembly, the pressure regulating valve assembly is connected to the hydrogen inlet manifold, and the pressure regulating valve assembly is used for regulating the hydrogen to a pressure set value and inputting the hydrogen into the hydrogen inlet manifold.
In the above embodiment, the pressure regulating valve assembly controls the inlet pressure of the hydrogen gas to a pressure set value, so as to ensure stable supply of the hydrogen gas, ensure the stability of the performance of the fuel cell, and improve the reliability.
In order to deal with sudden changes of the hydrogen pressure caused by some sudden situations, in an optional embodiment, the pressure stabilizing device further comprises a second pressure controller, the second pressure controller is in communication connection with the first pressure sensor, and the second pressure controller is used for adjusting a pressure set value according to the hydrogen pressure in the hydrogen inlet pressure stabilizing cavity.
In the above embodiment, in the actual operation process of the fuel cell, a sudden change of the hydrogen pressure may occur, for example, the amount of the circulated hydrogen changes greatly, the hydrogen pressure entering the hydrogen pressure stabilization cavity is monitored in real time by the first pressure sensor, and when the hydrogen pressure entering the hydrogen pressure stabilization cavity changes greatly, the adjustment of the hydrogen supply pressure is realized by adjusting the pressure set value, so that the stability of the hydrogen pressure is further ensured.
And the hydrogen outlet pressure stabilizing cavity is connected with the hydrogen outlet manifold and the outlet of the electric pile, and the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume.
It should be noted that the predetermined volume may be selected according to the hydrogen usage amount of the fuel cell to effectively reduce the stack hydrogen pressure fluctuation, as shown in fig. 2, the hydrogen inlet pressure stabilizing cavity and the hydrogen outlet pressure stabilizing cavity have the same model and larger volume, which is beneficial to the hydrogen pressure stability at the inlet and outlet of the stack, thereby reducing the stack hydrogen pressure fluctuation to a certain extent.
In order to further ensure the stability of the hydrogen pressure, in an alternative embodiment, as shown in fig. 1, the pressure stabilizer further includes a hydrogen discharge valve, the hydrogen discharge valve is connected to the outlet of the stack, and the hydrogen discharge valve is used for discharging part of the reacted hydrogen.
In the above embodiment, the hydrogen discharge valve is connected to the outlet of the stack, when the pressure of the hydrogen gas at the outlet of the stack rises sharply, the hydrogen gas is difficult to release from the hydrogen pressure stabilizing cavity in a short time, and the pressure of the hydrogen gas can be quickly reduced to a normal range by discharging part of the reacted hydrogen gas through the hydrogen discharge valve, so that the stability of the pressure of the hydrogen gas is further ensured.
In order to avoid the hydrogen pressure from dropping sharply during the hydrogen discharge process of the hydrogen discharge valve, in an alternative embodiment, as shown in fig. 1, the pressure stabilizer further includes a throttle, the throttle is connected to the hydrogen discharge valve, and the throttle is used for reducing the flow rate of the hydrogen discharged from the hydrogen discharge valve.
In the above embodiment, the flow rate of the hydrogen discharge process of the hydrogen discharge valve is too large, which may cause a sudden drop of the hydrogen pressure, and may also make the hydrogen pressure unstable, and the throttle is used to reduce the flow rate of the hydrogen discharged from the hydrogen discharge valve, so as to avoid the sudden drop of the hydrogen pressure, and further ensure the stability of the hydrogen pressure.
It should be noted that, as shown in fig. 3, the sectional area of the gas passage of the orifice is small, and the flow rate of the discharged hydrogen gas can be effectively restricted, and as shown in fig. 4, the sectional area of the gas passage in the connection structure of the orifice and the hydrogen discharge valve is gradually reduced, so that the flow rate of the discharged hydrogen gas is gradually reduced.
In order to realize dynamic control of the hydrogen pressure at the outlet of the stack, in an alternative embodiment, the pressure stabilizing device further includes a second pressure sensor and a first pressure controller, as shown in fig. 1, where the second pressure sensor is located in the hydrogen outlet pressure stabilizing cavity, and the second pressure sensor is used for detecting the hydrogen pressure in the hydrogen outlet pressure stabilizing cavity; the first pressure controller is in communication connection with the second pressure sensor and the hydrogen discharge valve, and the first pressure controller is used for triggering the hydrogen discharge valve to discharge hydrogen when the pressure of the hydrogen in the hydrogen outlet pressure stabilizing cavity is greater than a preset pressure.
In the embodiment, the pressure of hydrogen in the hydrogen pressure stabilizing cavity is detected in real time through the second pressure sensor, and when the pressure of the hydrogen out of the hydrogen pressure stabilizing cavity is detected to be larger than the preset pressure, the hydrogen discharge valve is triggered to discharge hydrogen, so that dynamic hydrogen discharge is realized, and the stable pressure of the hydrogen for a long time is realized.
In order to improve the hydrogen utilization rate, in an alternative embodiment, as shown in fig. 1, the pressure stabilizing device further includes a gas-water separator and a hydrogen circulating pump, wherein the gas-water separator is connected to the hydrogen outlet manifold, and the gas-water separator is configured to perform gas-water separation on the reacted hydrogen to obtain moisture and circulating hydrogen; the hydrogen circulation pump is connected to the gas-water separator and the hydrogen inlet manifold, and the hydrogen circulation pump is configured to return the circulating hydrogen to the hydrogen inlet manifold.
In the above embodiment, the gas-water separator performs gas-water separation on the reacted hydrogen to obtain water and circulating hydrogen, and the hydrogen circulating pump returns the circulating hydrogen to the hydrogen inlet manifold so as to enter the galvanic pile for secondary utilization, thereby improving the utilization rate of the hydrogen and saving energy.
In the pressure stabilizing device of the fuel cell hydrogen system, the pressure stabilizing device is provided with the hydrogen inlet pressure stabilizing cavity between the hydrogen inlet manifold and the inlet of the galvanic pile, the hydrogen outlet pressure stabilizing cavity is arranged between the hydrogen outlet manifold and the outlet of the galvanic pile, and the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume.
Embodiments of the present application also provide a fuel cell including a hydrogen system and the above-described pressure stabilization device.
The fuel cell comprises a hydrogen system and the pressure stabilizing device, wherein the pressure stabilizing device is provided with a hydrogen inlet pressure stabilizing cavity between a hydrogen inlet manifold and an inlet of the galvanic pile, a hydrogen outlet pressure stabilizing cavity between a hydrogen outlet manifold and an outlet of the galvanic pile, and the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume.
Embodiments of the present application also provide a vehicle including the fuel cell described above.
In the vehicle, the fuel cell comprises a hydrogen system and the voltage stabilizer, the voltage stabilizer is provided with a hydrogen inlet pressure stabilizing cavity between a hydrogen inlet manifold and an inlet of the galvanic pile, a hydrogen outlet pressure stabilizing cavity between a hydrogen outlet manifold and an outlet of the galvanic pile, and the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume.
It should be noted that the vehicle-mounted computer of the vehicle can be in communication connection with the first pressure sensor and the second pressure sensor to monitor the hydrogen pressure at the inlet and the outlet of the galvanic pile in real time, and timely remind a driver of the abnormal hydrogen pressure of the fuel cell of the vehicle when the hydrogen pressure exceeds a normal range.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other manners. The above-described embodiments of the apparatus are merely schematic, and it can be seen from the above description that the above-described embodiments of the present application achieve the following technical effects:
1) The utility model provides a among the pressure stabilizer of fuel cell hydrogen system, above-mentioned pressure stabilizer sets up into hydrogen pressure stabilizing cavity between the entry of hydrogen inlet manifold and galvanic pile, set up out hydrogen pressure stabilizing cavity between the export of hydrogen outlet manifold and galvanic pile, and the volume that enters hydrogen pressure stabilizing cavity and the volume that goes out hydrogen pressure stabilizing cavity all are greater than predetermined volume, compare in prior art pressure stabilizing cavity be into hydrogen manifold and go out hydrogen manifold's partly, through setting up independent pressure stabilizing cavity, the volume of pressure stabilizing cavity has been promoted greatly, galvanic pile hydrogen pressure oscillation is reduced to a certain extent, be favorable to galvanic pile entry and exit hydrogen pressure stability, the unstable problem of the hydrogen pressure of fuel cell hydrogen system among the prior art has been solved.
2) In the fuel cell of this application, including hydrogen system and foretell voltage regulator, above-mentioned voltage regulator sets up into hydrogen pressure stabilizing cavity between the entry of hydrogen inlet manifold branch and galvanic pile, set up out hydrogen pressure stabilizing cavity between the export of hydrogen outlet manifold branch and galvanic pile, and the volume of entering hydrogen pressure stabilizing cavity and the volume of going out hydrogen pressure stabilizing cavity all are greater than predetermined volume, compare in prior art pressure stabilizing cavity for hydrogen inlet manifold branch and a part of hydrogen outlet manifold branch, through setting up independent pressure stabilizing cavity, the volume of pressure stabilizing cavity has been promoted greatly, reduce galvanic pile hydrogen pressure fluctuation to a certain extent, be favorable to galvanic pile entry and exit hydrogen pressure stability, the unstable problem of hydrogen pressure of fuel cell hydrogen system among the prior art has been solved, thereby the performance and the reliability of galvanic pile have been improved.
3) In the vehicle of this application, fuel cell includes hydrogen system and foretell voltage regulator, above-mentioned voltage regulator sets up into hydrogen pressure stabilizing cavity between the entry of hydrogen inlet manifold branch and galvanic pile, set up out hydrogen pressure stabilizing cavity between the export of hydrogen outlet manifold branch and galvanic pile, and the volume of entering hydrogen pressure stabilizing cavity and the volume of going out hydrogen pressure stabilizing cavity all are greater than predetermined volume, compare in prior art pressure stabilizing cavity for hydrogen inlet manifold branch and a part of hydrogen outlet manifold branch, through setting up independent pressure stabilizing cavity, the volume of pressure stabilizing cavity has been promoted greatly, reduce galvanic pile hydrogen pressure oscillation to a certain extent, be favorable to galvanic pile entry and hydrogen exit pressure stability, the performance and the reliability of galvanic pile have been improved, reduce the fault rate of vehicle.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A pressure stabilizer for a hydrogen system of a fuel cell, the hydrogen system including a stack, a hydrogen inlet manifold and a hydrogen outlet manifold, the pressure stabilizer comprising:
the hydrogen inlet pressure stabilizing cavity is connected with the hydrogen inlet manifold and the inlet of the electric pile;
and the hydrogen outlet pressure stabilizing cavity is connected with the hydrogen outlet manifold and the outlet of the electric pile, and the volume of the hydrogen inlet pressure stabilizing cavity and the volume of the hydrogen outlet pressure stabilizing cavity are both larger than the preset volume.
2. The voltage stabilization apparatus according to claim 1, further comprising:
and the hydrogen discharge valve is connected with an outlet of the galvanic pile and is used for discharging partial reacted hydrogen.
3. The voltage stabilization apparatus according to claim 2, further comprising:
and the throttling port is connected with the hydrogen discharge valve and is used for reducing the flow of hydrogen discharged by the hydrogen discharge valve.
4. The voltage stabilization apparatus according to claim 1, further comprising:
and the first pressure sensor is positioned in the hydrogen inlet pressure stabilizing cavity and is used for detecting the hydrogen pressure of the hydrogen inlet pressure stabilizing cavity.
5. The voltage stabilization apparatus according to claim 2, further comprising:
the second pressure sensor is positioned in the hydrogen outlet pressure stabilizing cavity and is used for detecting the hydrogen pressure of the hydrogen outlet pressure stabilizing cavity;
and the first pressure controller is in communication connection with the second pressure sensor and the hydrogen discharge valve, and is used for triggering the hydrogen discharge valve to discharge hydrogen when the pressure of the hydrogen in the hydrogen outlet pressure stabilizing cavity is greater than a preset pressure.
6. The voltage stabilizing apparatus according to any one of claims 1 to 5, characterized by further comprising:
and the pressure regulating valve assembly is connected with the hydrogen inlet manifold and is used for regulating the hydrogen to a pressure set value and inputting the pressure set value into the hydrogen inlet manifold.
7. The voltage stabilization apparatus according to claim 4, further comprising:
and the second pressure controller is in communication connection with the first pressure sensor and is used for adjusting a pressure set value according to the hydrogen pressure of the hydrogen inlet pressure stabilizing cavity.
8. The voltage stabilization apparatus according to claim 1, further comprising:
the gas-water separator is connected with the hydrogen outlet manifold and is used for carrying out gas-water separation on the reacted hydrogen to obtain water and circulating hydrogen;
and the hydrogen circulating pump is connected with the gas-water separator and the hydrogen inlet manifold and used for returning the circulating hydrogen to the hydrogen inlet manifold.
9. A fuel cell characterized by comprising a hydrogen system and the pressure stabilizing apparatus according to any one of claims 1 to 8.
10. A vehicle characterized by comprising the fuel cell according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222269422.1U CN218827272U (en) | 2022-08-26 | 2022-08-26 | Pressure stabilizer of fuel cell hydrogen system, fuel cell and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222269422.1U CN218827272U (en) | 2022-08-26 | 2022-08-26 | Pressure stabilizer of fuel cell hydrogen system, fuel cell and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN218827272U true CN218827272U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222269422.1U Active CN218827272U (en) | 2022-08-26 | 2022-08-26 | Pressure stabilizer of fuel cell hydrogen system, fuel cell and vehicle |
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| CN (1) | CN218827272U (en) |
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2022
- 2022-08-26 CN CN202222269422.1U patent/CN218827272U/en active Active
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