CN214672698U - Air supply system of fuel cell system for rail vehicle - Google Patents
Air supply system of fuel cell system for rail vehicle Download PDFInfo
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- CN214672698U CN214672698U CN202120579975.XU CN202120579975U CN214672698U CN 214672698 U CN214672698 U CN 214672698U CN 202120579975 U CN202120579975 U CN 202120579975U CN 214672698 U CN214672698 U CN 214672698U
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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 utility model discloses a fuel cell system's air supply system for rail vehicle, it includes: the controller, air delivery system, hydrogen sweeps the pipe, the air sweeps the pipe, air recovery system, air intake and exhaust system, the hydrogen supply line, humidity transducer, sweep the delivery pipe, the utility model discloses effectively solved and adopted high-power air booster to satisfy the required air of galvanic pile response among the rail vehicle fuel cell system and the running noise that causes is big, it is low to arrange the space and lead to fuel cell system integration degree greatly, the system auxiliary power consumption leads to fuel cell system generating efficiency low greatly, high-power air booster lectotype difficulty and customization development purchasing cost height grade shortcoming, shut down that to sweep protection work that has solved current fuel cell system again and adopted independent sweep the system and lead to fuel cell system integration degree low, structure complicacy shortcomings such as redundancy.
Description
Technical Field
The utility model relates to an air supply field especially relates to a fuel cell system's for rail vehicle air supply system.
Background
To meet the increasing output power demands of fuel cell systems for high load, high range rail vehicles, an air supply system is required to provide air to the stacks in the fuel cell system to meet their response requirements. The prior art approach is to use a high power air supercharger in the air supply system to meet the air required for stack response in the rail vehicle fuel cell system, but the prior art approach has the following disadvantages:
1. the adoption of the high-power air supercharger has the defects of high operation noise, large arrangement space, low integration level of a fuel cell system, high auxiliary power consumption of the fuel cell system, low power generation efficiency of the system and the like;
2. the defects that the air supercharger is difficult to select and the purchasing cost is high if the air supercharger is customized and developed because fewer air supercharger products meet the requirements of a high-power fuel cell system of a railway vehicle are produced;
meanwhile, the shutdown purging protection work of the existing fuel cell system adopts an independent purging system, so that the defects of low integration level, complex and redundant structure and the like of the fuel cell system are caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides an air supply system of fuel cell system for rail vehicle to overcome technical problem.
In order to achieve the above object, the present invention provides an air supply system of a fuel cell system for a rail vehicle, which includes a controller, an air delivery system, an air purge pipe, an air intake and exhaust system, a hydrogen supply pipeline, a humidity sensor, a purge discharge pipe, and is characterized in that: the hydrogen purging pipe comprises a hydrogen purging pipeline and a one-way valve b, the air recovery system comprises an air recovery pipeline, a pressure sensor b, an electric control stop valve b, an ejector, a pressure flow sensor, a one-way valve c, a gas-water separator, an electric control stop valve d and a one-way valve d, the pressure sensor b, the electric control stop valve b, the ejector, the pressure flow sensor, the one-way valve c, the gas-water separator, the electric control stop valve d and the one-way valve d are sequentially connected through the air recovery pipeline, the one-way valve d is connected with an air conveying system, the air recovery pipeline, a purging discharge pipe, a hydrogen supply pipeline and a humidity sensor are connected with a galvanic pile, the hydrogen purging pipeline is connected with the air purging pipe, the one-way valve b is connected with a hydrogen supply pipeline, and two ends of the air purging pipe are respectively connected with the air conveying system and the air recovery system, the air intake and exhaust system is arranged between the one-way valve c and the electric control stop valve b.
Further, the air conveying system comprises an air conveying pipeline, an air filter, a pressure sensor a, an air supercharger, a pressure and temperature sensor, a heat exchanger, a temperature sensor and a one-way valve a, wherein the air conveying pipeline sequentially connects the air filter, the pressure sensor a, the air supercharger, the pressure and temperature sensor, the heat exchanger, the temperature sensor and the one-way valve a, and the one-way valve a is connected with the electric pile.
Further, the air purging pipe comprises an electric control stop valve c and an air purging pipeline, the electric control stop valve c is connected to a pipeline between the electric control stop valve d and the air-water separator, and the air purging pipeline is connected with the hydrogen purging pipeline.
Furthermore, the air inlet and exhaust system comprises an electric control stop valve a and an air inlet and exhaust pipeline, one end of the electric control stop valve a is arranged between the one-way valve c and the electric control stop valve b, and the other end of the electric control stop valve a is connected with the air inlet and exhaust pipeline.
Further, the purging and discharging pipe also comprises an electric control stop valve e.
In a second aspect, the present invention provides a fuel cell system for a rail vehicle, which includes a stack and the air supply system of the fuel cell system for a rail vehicle of the first aspect.
Further, the stack includes a hydrogen reaction side, a purge discharge side, an air reaction side, and an air discharge side.
Further, the air recovery line is connected to the air discharge side, and the purge discharge pipe is connected to the purge discharge side.
Further, a hydrogen supply line is connected to the hydrogen reaction side.
Further, a check valve a and an electrically controlled stop valve c are connected to the air reaction side.
The utility model discloses effectively solved and adopted high-power air booster to satisfy the required air of pile response in the rail vehicle fuel cell system and the running noise that causes is big, it is low to arrange the space and lead to fuel cell system integration degree greatly, system auxiliary power consumption leads to fuel cell system generating efficiency low greatly, high-power air booster model selection difficulty and customization development purchasing cost shortcoming such as high, the shut down of having solved current fuel cell system again sweeps protection work and adopts independent sweep system to lead to fuel cell system integration degree low, shortcomings such as the complicated redundancy of structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic view of an air supply system of a fuel cell system for a rail vehicle according to the present invention;
fig. 2 is a schematic view of an air delivery system in an air supply system of a fuel cell system for a rail vehicle according to the present invention;
fig. 3 is a schematic view of an air recovery system in an air supply system of a fuel cell system for a rail vehicle according to the present invention;
in the figure: 1. controller, 2, air delivery system, 201, air delivery pipeline, 202, air cleaner, 203, pressure sensor a, 204, air booster, 205, pressure temperature sensor, 206, heat exchanger, 207, temperature sensor, 208, check valve a, 3, hydrogen purge pipe, 301, hydrogen purge pipeline, 302, check valve b, 4, air purge pipe, 401, electric control stop valve c, 402, air purge pipeline, 5, air recovery system, 501, air recovery pipeline, 502, pressure sensor b, 503, electric control stop valve b, 504, injector, 505, pressure flow sensor, 506, check valve c, 507, gas-water separator, 508, electric control stop valve d, 509, check valve d, 6, air intake and exhaust system, 601, electric control stop valve a, 602, air intake and exhaust pipeline, 7, hydrogen supply pipeline, 8, humidity sensor, 9, air cleaner, and air cleaner, The hydrogen reaction side, the air discharge side, the hydrogen reaction side, the electricity control stop valve, the electricity control valve, the electricity stack, the electricity control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment one provides an air supply system of a fuel cell system for a rail vehicle, as shown in fig. 1, comprising a controller 1, an air delivery system 2, an air purge pipe 4, an air inlet and exhaust system 6, a hydrogen supply pipeline 7, a humidity sensor 8 and a purge exhaust pipe 10, and is characterized in that: the hydrogen purging pipe 3 comprises a hydrogen purging pipeline 301 and a one-way valve b302, the air recovery system 5 comprises an air recovery pipeline 501, a pressure sensor b502, an electronic control stop valve b503, an ejector 504, a pressure flow sensor 505, a one-way valve c506, a gas-water separator 507, an electronic control stop valve d508 and a one-way valve d509, the pressure sensor b502, the electronic control stop valve b503, the ejector 504, the pressure flow sensor 505, the one-way valve c506, the gas-water separator 507, the electronic control stop valve d508 and the one-way valve d509 are sequentially connected through the air recovery pipeline 501, the one-way valve d509 is connected with the air conveying system 2, the air recovery pipeline 501, a purging discharge pipe 10, a hydrogen supply pipeline 7 and a humidity sensor 8 are connected with the electric pile 9, the hydrogen purging pipeline 301 is connected with the air purging pipe 4, the one-way valve b302 is connected with the hydrogen supply pipeline 7, the two ends of the air purge pipe 4 are respectively connected with the air conveying system 2 and the air recovery system 5, and the air inlet and exhaust system 6 is arranged between the one-way valve c506 and the electric control stop valve b 503.
In the embodiment 1, the air delivery system 2 includes an air delivery pipe 201, an air cleaner 202, a pressure sensor a203, an air supercharger 204, a pressure/temperature sensor 205, a heat exchanger 206, a temperature sensor 207, and a check valve a208, the air delivery pipe 201 connects the air cleaner 202, the pressure sensor a203, the air supercharger 204, the pressure/temperature sensor 205, the heat exchanger 206, the temperature sensor 207, and the check valve a208 in this order, and the check valve a208 is connected to the stack 9.
In the embodiment 1, the air purge pipe 4 includes an electrically controlled stop valve c401 and an air purge line 402, the electrically controlled stop valve c401 is connected to a line between an electrically controlled stop valve d508 and the gas-water separator 507, and the air purge line 402 is connected to the hydrogen purge line 301.
In embodiment 1, the intake and exhaust system 6 includes an electrically controlled stop valve a601 and an intake and exhaust pipeline 602, one end of the electrically controlled stop valve a601 is interposed between the check valve c506 and the electrically controlled stop valve b503, and the other end of the electrically controlled stop valve a601 is connected to the intake and exhaust pipeline 602.
In the embodiment 1, the purge discharge pipe 10 further includes an electrically controlled cut-off valve e 1001.
In a similar manner, embodiment 2 of the present invention provides a fuel cell system for a rail vehicle, including a stack 9 and the air supply system of the fuel cell system for a rail vehicle described in embodiment 1.
In embodiment 2, stack 9 includes a hydrogen reactant side 901, a purge vent side 902, an air reactant side 903, and an air vent side 904.
In the embodiment 2, the air recovery line 501 is connected to the air discharge side 904 and the purge discharge line 10 is connected to the purge discharge side 902.
In embodiment 2, the hydrogen supply line 7 is connected to the hydrogen reaction side 901.
In the specific embodiment 2, a check valve a208 and an electrically controlled stop valve c401 are connected to the air reaction side 903.
The hydrogen purge tube functions as follows: (1) purging and evacuating hydrogen for a hydrogen supply pipeline after the fuel cell system is shut down, so that the danger caused by leakage of residual hydrogen in the pipeline after the shut down is avoided; (2) the fuel cell system sweeps out the galvanic pile with the inside deposit water of hydrogen reaction side of galvanic pile after shutting down, avoids under low temperature environment the inside water of galvanic pile to freeze and leads to damaging the galvanic pile and the hydrogen reaction side deposit water and cause the circumstances such as galvanic pile flood damage galvanic pile.
The air purging pipe purges the water stored in the air reaction side of the electric pile out of the electric pile after the fuel cell system is shut down, thereby avoiding the conditions that the water stored in the electric pile is too much to cause water freezing in the electric pile to damage the electric pile and the water stored in the air reaction side to cause water flooding of the electric pile to damage the electric pile and the like in a low-temperature environment.
The function of the air recovery system is as follows: (1) the rest air which is discharged by the galvanic pile and does not participate in the reaction is input into an ejector controlled by a controller, and is connected into an air conveying system after the controller accurately controls the air pressure and the flow passing through the ejector, and the ejector and an air supercharger work cooperatively to provide the required air for the response of the galvanic pile, so that various defects caused by the adoption of a high-power air supercharger are overcome; (2) and the shutdown purging protection work of the fuel cell system is taken charge.
The intake and exhaust system functions as follows: (1) when the internal pressure of the galvanic pile is larger than the bearing pressure range, an electric control stop valve a of the air inlet and exhaust system is opened and releases the internal pressure of the galvanic pile until the internal pressure of the galvanic pile meets the pressure range; (2) the air required for purging is provided for shutdown purge protection operation of the fuel cell system.
The air conveying system 2 and the hydrogen supply pipeline 7 are respectively connected with an air reaction side 903 and a hydrogen reaction side 901 of the electric pile 9, and provide required air and hydrogen for the power generation operation of the electric pile 9; the air recovery system 5 is connected with an air discharge side 904 of the electric pile 9, and residual air which does not participate in the reaction after the reaction of the electric pile 9 can be recycled by the air recovery system 5 or directly discharged by the exhaust system 6 according to the requirement of the fuel cell system; the purge discharge pipe 10 is connected to a purge discharge side 902 of the stack 9, and gas and water discharged by purging the stack 9 in the shutdown purge protection operation of the fuel cell system are discharged through the purge discharge pipe 10.
The controller 1 is responsible for collecting signals fed back by various sensors in the air supply system and controlling the action of executing components in the system according to the feedback signals and the realization of system functions. The controller 1 collects signals of the air conveying system 2, the air recovery system 5 and the humidity sensor 8, and the controller 1 controls the air conveying system 2, the air purging pipe 4, the air recovery system 5, the air inlet and exhaust system 6 and the purging and discharging pipe 10 to execute instructions.
As shown in fig. 1 and 2, after the fuel cell system is started, the air supply system 2 and the hydrogen supply line 7 respectively supply air and hydrogen required for reaction for power generation operation of the cell stack 9, and at this time, the controller 1 controls the electrically controlled stop valve c401, the electrically controlled stop valve b503, the electrically controlled stop valve d508, the electrically controlled stop valve a601, the electrically controlled stop valve e1001, and the like to be closed. Air enters through an air delivery line 201 in the air delivery system 2, is filtered through an air filter 202, and reaches the inlet of an air supercharger 204. The air supercharger 204 boosts the pressure of the air, increases the air flow rate, and sends the air to the heat exchanger 206 to cool the air, and the controller 1 monitors the temperature of the air cooled by the heat exchanger 206 in real time by the temperature sensor 207. If the detected temperature is higher than the air temperature range required by the stack 9, the controller 1 controls the heat exchanger 206 to increase the cooling and heat dissipation power, so that the air temperature meets the air temperature range required by the stack 9. The controller 1 monitors the intake air pressure and the intake air temperature in the air delivery system 2 in real time through the pressure sensor a203 and the pressure temperature sensor 205, and precisely controls and adjusts the operating state of the air supercharger 204 according to the monitored feedback signals. The air cooled by the heat exchanger 206 enters the stack 9 through the check valve a208 and the air reaction side 903 in sequence. Hydrogen enters the stack 9 through the hydrogen supply line 7 and the hydrogen reaction side 901 in this order.
As shown in fig. 1 and 3, when the air supercharger 204 meets the air demand of the stack 9 in response, the pressure sensor b502 in the air recovery system 5 monitors the pressure of the air discharged from the air discharge side 904 of the stack 9 in real time. When the pressure sensor b502 monitors that the pressure meets the requirement of the electric pile 9, the controller 1 controls the electric control stop valve b503 and the electric control stop valve a601 to close, and the internal working pressure of the electric pile 9 is maintained. When the pressure sensor b502 monitors that the pressure exceeds the requirement of the galvanic pile 9, the controller 1 controls the electric control stop valve b503 to close, the electric control stop valve a601 in the air intake and exhaust system 6 is opened, and at the moment, overpressure gas is discharged through the check valve c506 and the air intake and exhaust system 6 in sequence; when the air pressure monitored by the pressure sensor b502 meets the requirement of the electric pile 9, the controller 1 controls the electric control stop valve a601 to close and maintain the internal working pressure of the electric pile 9, and then the electric control stop valve is operated in sequence according to the logic.
As shown in fig. 1 and 3, when the air supercharger 204 cannot meet the air demand of the stack 9, the controller 1 controls the electrically controlled stop valve b503 and the electrically controlled stop valve d508 to be opened, and the electrically controlled stop valve a601 and the electrically controlled stop valve c401 to be closed. Unreacted residual air in the galvanic pile 9 is delivered to the ejector 504 sequentially through the air discharge side 904, the air recovery pipeline 501, the check valve c506 and the electric control stop valve b503, the controller 1 controls the ejector 504 to accurately control the pressure and the flow of the air which cannot be met by the air supercharger 204 in response to the demands and deliver the air to the gas-water separator 507 to separate the gas and the moisture in the air, the dried air after the moisture separation sequentially passes through the electric control stop valve d508 and the check valve d509 and is connected to the air delivery system 2, and the dried air and the air supercharger 204 cooperate to serve as the air for responding to the demands of the galvanic pile 9. The controller 1 monitors the flow and pressure of the gas injected by the injector 504 in real time through signals of the pressure flow sensor 505, and controls and adjusts the working state of the injector 504 according to the response requirement of the galvanic pile 9.
As shown in fig. 1 and 3, after the fuel cell system is shut down, purge protection work is required. The purging protection work has the effect that the stored water in the electric pile 9 is purged out of the electric pile after the fuel cell system is shut down, so that the conditions that the electric pile is damaged due to icing of the water in the electric pile in a low-temperature environment and the electric pile is damaged due to flooding of the stored water in the electric pile are avoided. The controller 1 controls the electric control stop valve b503, the electric control stop valve a601, the electric control stop valve c401 and the electric control stop valve e1001 to be opened, and controls the electric control stop valve d508 to be closed. The purge air passes through the air inlet and outlet pipeline 602 and the electrically controlled stop valve a601 in sequence, then is connected to the air recovery system 5, and reaches the injector 504 through the electrically controlled stop valve b503, and the purge air cannot enter the cell stack 9 under the action of the one-way valve c 506. The controller 1 precisely controls the pressure and flow of the purge air by controlling the ejector 504, then conveys the purge air to the gas-water separator 507 for gas-water separation, then sends the separated dry air to the air reaction side 903 and the hydrogen reaction side 901 of the electric pile 9 for purging after respectively passing through the electric control stop valve c401 in the air purge pipe 4, the air purge pipeline 402, the hydrogen purge pipeline 301 in the hydrogen purge pipe 3 and the one-way valve b302, and discharges the purged moisture and gas through the purge discharge pipe 10 and the electric control stop valve e 1001; the controller 1 monitors the internal humidity of the galvanic pile 9 in real time through a signal of the humidity sensor 8, and when the humidity sensor 8 monitors that the internal humidity of the galvanic pile 9 meets the humidity requirement, the controller 1 controls the ejector 504 to stop working, and simultaneously closes the electric control stop valve a601 and the electric control stop valve e 1001.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. An air supply system of a fuel cell system for a rail vehicle, comprising a controller (1), an air delivery system (2), an air purge pipe (4), an air intake and exhaust system (6), a hydrogen supply line (7), a humidity sensor (8), a purge discharge pipe (10), characterized in that: still blow pipe (3) and air recovery system (5) including hydrogen, hydrogen blows pipe (3) and sweeps pipeline (301) including hydrogen, check valve b (302), air recovery system (5) are including air recovery pipeline (501), pressure sensor b (502), automatically controlled stop valve b (503), sprayer (504), pressure flow sensor (505), check valve c (506), moisture separator (507), automatically controlled stop valve d (508), check valve d (509), air recovery pipeline (501) is with pressure sensor b (502), automatically controlled stop valve b (503), sprayer (504), pressure flow sensor (505), check valve c (506), moisture separator (507), automatically controlled stop valve d (508), check valve d (509) connect gradually, check valve d (509) are connected with air conveying system (2), air conveying system (2) is connected, The air recovery system comprises an air recovery pipeline (501), a purging discharge pipe (10), a hydrogen supply pipeline (7) and a humidity sensor (8), wherein the air recovery pipeline (501), the purging discharge pipe (10), the hydrogen supply pipeline (7) and the humidity sensor (8) are connected with a galvanic pile (9), a hydrogen purging pipeline (301) is connected with an air purging pipe (4), a one-way valve b (302) is connected with the hydrogen supply pipeline (7), two ends of the air purging pipe (4) are respectively connected with an air conveying system (2) and an air recovery system (5), and an air inlet and exhaust system (6) is arranged between a one-way valve c (506) and an electric control stop valve b (503).
2. The air supply system of a fuel cell system for a railway vehicle according to claim 1, characterized in that: the air conveying system (2) comprises an air conveying pipeline (201), an air filter (202), a pressure sensor a (203), an air supercharger (204), a pressure temperature sensor (205), a heat exchanger (206), a temperature sensor (207) and a one-way valve a (208), wherein the air conveying pipeline (201) sequentially connects the air filter (202), the pressure sensor a (203), the air supercharger (204), the pressure temperature sensor (205), the heat exchanger (206), the temperature sensor (207) and the one-way valve a (208), and the one-way valve a (208) is connected with the galvanic pile (9).
3. The air supply system of a fuel cell system for a railway vehicle according to claim 2, characterized in that: the air purging pipe (4) comprises an electric control stop valve c (401) and an air purging pipeline (402), the electric control stop valve c (401) is connected to a pipeline between the electric control stop valve d (508) and the air-water separator (507), and the air purging pipeline (402) is connected with the hydrogen purging pipeline (301).
4. The air supply system of a fuel cell system for a railway vehicle according to claim 3, characterized in that: the air intake and exhaust system (6) comprises an electric control stop valve a (601) and an air intake and exhaust pipeline (602), one end of the electric control stop valve a (601) is arranged between a one-way valve c (506) and an electric control stop valve b (503), and the other end of the electric control stop valve a (601) is connected with the air intake and exhaust pipeline (602).
5. The air supply system of a fuel cell system for a railway vehicle according to claim 4, characterized in that: the purge discharge pipe (10) further comprises an electrically controlled stop valve e (1001).
6. A fuel cell system for a rail vehicle, characterized in that: air supply system comprising a stack (9) and a fuel cell system for rail vehicles according to claim 5.
7. The fuel cell system for a railway vehicle according to claim 6, wherein: the stack (9) includes a hydrogen reaction side (901), a purge discharge side (902), an air reaction side (903), and an air discharge side (904).
8. The fuel cell system for a railway vehicle according to claim 7, wherein: the air recovery line (501) is connected to the air discharge side (904) and the purge discharge pipe (10) is connected to the purge discharge side (902).
9. The fuel cell system for a railway vehicle according to claim 8, wherein: the hydrogen supply line (7) is connected to the hydrogen reaction side (901).
10. The fuel cell system for a railway vehicle according to claim 8, wherein: a check valve a (208) and an electrically controlled shut-off valve c (401) are connected to the air reaction side (903).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120579975.XU CN214672698U (en) | 2021-03-22 | 2021-03-22 | Air supply system of fuel cell system for rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120579975.XU CN214672698U (en) | 2021-03-22 | 2021-03-22 | Air supply system of fuel cell system for rail vehicle |
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| Publication Number | Publication Date |
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| CN214672698U true CN214672698U (en) | 2021-11-09 |
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| CN202120579975.XU Active CN214672698U (en) | 2021-03-22 | 2021-03-22 | Air supply system of fuel cell system for rail vehicle |
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- 2021-03-22 CN CN202120579975.XU patent/CN214672698U/en active Active
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