CN111261907A - Fuel cell system with water channel pressure regulating function - Google Patents
Fuel cell system with water channel pressure regulating function Download PDFInfo
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- CN111261907A CN111261907A CN201811467288.8A CN201811467288A CN111261907A CN 111261907 A CN111261907 A CN 111261907A CN 201811467288 A CN201811467288 A CN 201811467288A CN 111261907 A CN111261907 A CN 111261907A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04776—Pressure; Flow at auxiliary devices, e.g. reformer, compressor, burner
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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
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Abstract
The invention relates to a fuel cell system with a water channel pressure regulating function. The system comprises a water tank, a high-pressure gas source, a gas injection pipeline, a gas exhaust pipeline and a water discharge pipeline; the water tank is arranged in a cooling water waterway of the fuel cell and is connected with a relatively independent gas injection pipeline, an exhaust pipeline and a drainage pipeline; the gas injection pipeline is connected with a high-pressure gas source through a gas injection control valve, and the gas injection control valve, the gas exhaust control valve and the water exhaust control valve of the gas injection pipeline, the gas exhaust pipeline and the water exhaust pipeline are respectively connected with the fuel cell control system. The exhaust pipeline and the drainage pipeline can be combined into an exhaust/water pipeline; the exhaust line can be directly connected to the intake line of the fuel cell. The invention has simple structure and easy realization, is not influenced by the operating pressure of the fuel cell, dynamically adjusts the pressure of the cooling water channel of the fuel cell, further controls the pressure difference at two sides of the water permeable plate to be always in a reasonable range, protects the water permeable plate from being damaged, and can normally drain water and exhaust air.
Description
Technical Field
The invention belongs to the field of fuel cells, relates to a water-permeable bipolar plate fuel cell, and particularly relates to a fuel cell system with a water channel pressure regulating function.
Background
The fuel cell is an electrochemical reaction device capable of directly converting chemical energy in fuel into electric energy, has the characteristics of high starting speed, high working efficiency, environmental friendliness and the like, and is one of research hotspots in the field of new energy in recent years.
The water permeable bipolar plate fuel cell is one kind of fuel cell, and has the water permeating characteristic of water permeating and gas blocking of the water permeating plate to discharge the liquid water from the cell into the coolant cavity and further out of the cell. The water-permeable bipolar plate fuel cell has the functions of humidification, water drainage and heat dissipation, and is applied to a hydrogen-oxygen fuel cell by UTC company at the earliest, but is less applied to the hydrogen-oxygen fuel cell.
For a fuel cell system using the water-permeable bipolar plate, the pressure difference at two sides of the water-permeable plate needs to be controlled within a certain reasonable range during operation, and the pressure difference can not be too large or too small. Because the porous plate has a bubble point, if the pressure difference between the two sides of the porous plate is too large and exceeds the bubble point, the problems of gas resistance, water permeability, failure and even damage of the porous plate can occur; in addition, as the generated water is continuously increased during the operation of the battery, if the pressure difference between the two sides of the water permeable plate is too small, the generated water cannot be timely drained into the cooling water cavity, so that the membrane electrode is flooded with water, and the performance and the reliability of the battery are reduced.
The pressure difference setting on the two sides of the permeable plate is determined by the characteristic of the permeable resistance of the permeable plate and is irrelevant to the operation pressure of the fuel cell. At present, most of common permeable bipolar plate fuel cells are operated under normal pressure, and a water channel does not need pressurization. However, for systems with higher operating pressures, operating the water path under pressure is required to maintain the pressure differential across the permeable plate. In addition, in the continuous operation of the fuel cell, because the water volume entering the water cavity through the water permeable plate is more and more, and the water may carry a small amount of gas in the process of passing through the water permeable plate, in addition, the gas partially dissolved in the water is separated out due to the pressure reduction, so that the gas in the water channel is accumulated more and more, the pressure is higher and higher, at the moment, partial gas and water need to be released, namely, the water channel pressure needs to be adjusted by a proper method, and the balance of the pressure difference at two sides of the water permeable plate can be kept.
Disclosure of Invention
The invention aims to develop a fuel cell system with a water channel pressure regulating function, which can dynamically regulate the pressure of a cooling water channel of a fuel cell, further control the pressure difference at two sides of a water permeable plate to be always in a reasonable range, protect the water permeable plate from being damaged, and normally drain water and exhaust air.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fuel cell system with a waterway pressure regulating function comprises a water tank, a high-pressure gas source, a gas injection pipeline, a gas exhaust pipeline and a water drainage pipeline;
the water tank is arranged in a cooling water waterway of the fuel cell, the water tank is connected with an air injection pipeline, an exhaust pipeline and a water drainage pipeline, the air injection pipeline, the exhaust pipeline and the water drainage pipeline are relatively independent, and the independent opening and closing are realized by installing corresponding control valves on the pipelines respectively;
the gas injection pipeline is connected with a high-pressure gas source through a gas injection control valve, the exhaust pipeline is connected to the top of the water tank, an exhaust control valve is arranged on the exhaust pipeline, the exhaust pipeline is connected to the bottom of the water tank, a water exhaust control valve is arranged on the exhaust pipeline, and the gas injection control valve, the exhaust control valve and the water exhaust control valve are respectively connected with the fuel cell control system.
Further, the high-pressure gas source uses an external high-pressure gas source or uses the self reaction gas of the fuel cell.
Further, the external high-pressure gas source is nitrogen or air.
Further, the exhaust pipeline and the water discharge pipeline can be combined into an exhaust/water pipeline which is connected with an exhaust/water control valve. When the pressure of the water tank is too high, discharging water or gas through an exhaust/water control valve; after the tank pressure returns to normal, the exhaust/water control valve is closed. The arrangement can simplify the system flow, reduce the waterway valves and is beneficial to improving the reliability of the fuel cell system.
Furthermore, the exhaust pipeline can be directly connected with an air inlet pipeline of the fuel cell, the exhaust pipeline is connected with the air inlet pipeline of the fuel cell through an exhaust control valve and an air pump, and the exhaust control valve is linked with the air pump. When the pressure of the water tank is too high and exhaust is needed, the gas in the water tank is directly guided back to the reaction gas inlet pipeline of the fuel cell through the exhaust pipeline. The air pump is linked with the control valve, has the function of improving the gas pressure and is used for pumping the gas in the water tank into the reaction gas inlet pipeline of the fuel cell. The arrangement can avoid the waste of the reaction gas of the fuel cell and ensure the high utilization rate of the gas.
Further, the air injection control valve, the air exhaust control valve and the water exhaust control valve adopt electromagnetic valves with pulse or opening degree continuously adjusted.
Furthermore, a liquid level sensor is arranged in the water tank and is connected with a fuel cell control system.
Compared with the prior art, the invention has the beneficial effects that:
the invention can dynamically adjust the pressure of the cooling water path of the fuel cell, further control the pressure difference at two sides of the water permeable plate to be always in a reasonable range, protect the water permeable plate from being damaged, and simultaneously normally drain and exhaust; the system has simple and convenient flow, is easy to realize, is not influenced by the operating pressure of the fuel cell, and is very suitable for being applied to the high-pressure water permeable plate fuel cell.
Drawings
In order to more clearly illustrate the embodiments of the present application 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, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a fuel cell system with a water path pressure regulating function according to embodiment 1 of the present invention;
in the figure: 1. a permeable bipolar plate fuel cell stack, 2, a cell load, 3a, a fuel inlet, 3b, a fuel outlet, 4a, an oxidant inlet, 4b, an oxidant outlet, 5, a cooling water path, 6, a water tank, 7, a water pump, an ECU, a fuel cell control system, 8, a gas injection pipeline, 9, an exhaust pipeline, 10, a water discharge pipeline, 11, a gas injection control valve, 12, an exhaust control valve, 13, a water discharge control valve, 14, a high-pressure gas source for the gas injection pipeline, 15, a liquid level sensor
Fig. 2 is a flowchart of a fuel cell system with a water path pressure regulating function according to embodiment 2 of the present invention;
in the figure: 1. a water-permeable bipolar plate fuel cell stack, 2, a cell load, 3a, a fuel inlet, 3b, a fuel outlet, 4a, an oxidant inlet, 4b, an oxidant outlet, 5, a cooling water channel, 6, a water tank, 7, a water pump, an ECU, a fuel cell control system, 20, an air injection pipeline, 21, an exhaust/water pipeline, 22, an air injection control valve, 23 and an exhaust/water control valve;
fig. 3 is a flowchart of a fuel cell system with a water path pressure regulating function according to embodiment 3 of the present invention;
in the figure: 1. the fuel cell stack comprises a water-permeable bipolar plate, 2, a cell load, 3a, a fuel inlet, 3b, a fuel outlet, 4a, an oxidant inlet, 4b, an oxidant outlet, 5, a cooling water channel, 6, a water tank, 7, a water pump, an ECU, a fuel cell control system, 10, a water discharge pipeline, 13, a water discharge control valve, 15, a liquid level sensor, 20, an air injection pipeline, 22, an air injection control valve, 30, an exhaust pipeline, 31, an air pump, 32 and an exhaust control valve.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
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 exemplary embodiments according to the invention. 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.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1, a fuel cell system with a water path pressure regulating function includes a water tank 6, a high-pressure gas source 14, a gas injection pipeline 8, a gas exhaust pipeline 9 and a water discharge pipeline 10; the water tank 6 is arranged in a cooling water waterway of the fuel cell, a floating ball liquid level meter 15 is installed in the water tank 6, the liquid level meter 15 is connected with an ECU (electronic control Unit) of the fuel cell, the water tank 6 is connected with an air injection pipeline 8, an air exhaust pipeline 9 and a water exhaust pipeline 10, the air injection pipeline 8, the air exhaust pipeline 9 and the water exhaust pipeline 10 are relatively independent, the air injection pipeline 8 is connected with a high-pressure air source 14 through an air injection control valve 11, the high-pressure air source 14 uses an external high-pressure air source in the embodiment, and the air injection pipeline 8 is connected with an external high-; the exhaust pipeline 9 is connected to the top of the water tank, an exhaust control valve 12 is arranged on the exhaust pipeline 9, the drain pipeline 10 is connected to the bottom of the water tank 6, a drain control valve 13 is arranged on the drain pipeline 10, and the injection control valve 11, the exhaust control valve 12 and the drain control valve 13 are connected with the fuel cell control system ECU. The injection control valve 11, the exhaust control valve 12 and the drain control valve 13 are solenoid valves, and the operation modes include pulse, continuous opening adjustment and the like, and can be freely selected according to actual experimental conditions.
When the permeable bipolar plate fuel cell stack 1 runs, the fuel cell control system ECU monitors the pressure difference P of the permeable plate of the permeable bipolar plate fuel cell stack 1 in real time through the pressure sensor connected with the oxidant and the water channel. When the fuel cell of the embodiment operates, the normal range of P is 0.1-0.2 bar, when the ECU of the fuel cell control system detects that the value of P is higher than 0.2bar and the cooling water path needs to be pressurized, the ECU of the fuel cell control system controls the opening of the gas injection control valve 11, nitrogen in the high-pressure gas source 14 enters the water tank 6, the pressure of the cooling water path is increased, and the value of P is reduced; when P falls within the normal range, the gas injection control valve 11 is closed, and the gas supply pressurization is stopped. When the fuel cell control system ECU detects that the P value is lower than 0.1bar, the cooling water path needs to be exhausted, at the moment, the fuel cell control system ECU controls the exhaust control valve 12 to be opened, the gas in the water tank 6 is exhausted through the exhaust pipeline 9, the pressure of the cooling water path is reduced, and the P value is increased; when P rises to within the normal range, the exhaust control valve 12 is closed, and exhaust is stopped.
The water generated in the operation of the permeable bipolar plate fuel cell stack 1 continuously enters a cooling water channel, so that the liquid level in the water tank 6 is higher and higher, the floating ball liquid level meter 15 is installed in the water tank 6, and the ECU of the fuel cell control system monitors the liquid level in the water tank 6 through the liquid level meter 15 so as to control the opening or closing of the drainage control valve 13. When the liquid level in the water tank 6 is high, the water discharge control valve 13 is opened to start water discharge; when the liquid level falls to normal, the drain control valve 13 is closed.
Example 2
As shown in fig. 2, in the fuel cell system with the water channel pressure regulating function in the present embodiment, the gas injection pipeline 20 is directly connected to the oxidant inlet 4a through the gas injection control valve 22, that is, the oxidant inlet gas with higher pressure is used as the high-pressure gas source for injecting gas into the water tank 6; the exhaust line and the drain line are combined into an exhaust/water line 21, and an exhaust/water control valve 23 is connected thereto, and the other structure is the same as that of embodiment 1.
When the permeable bipolar plate fuel cell stack 1 runs, the fuel cell control system ECU monitors the pressure difference P of the permeable plate of the permeable bipolar plate fuel cell stack 1 in real time through the pressure sensor connected with the oxidant and the water path, wherein the normal range of P in the embodiment is 0.2-0.4 bar. When the ECU detects that the P value is higher than 0.4bar and the cooling water circuit needs to be pressurized, the ECU controls the gas injection control valve 22 to be opened, part of oxidant gas enters the water tank 6, the pressure of the cooling water circuit is increased, and the P value is reduced; when P falls within the normal range, the gas injection control valve 22 is closed, and gas injection is stopped. When the ECU detects that the P value is lower than 0.2bar, the cooling water pipeline needs to be exhausted, the ECU controls the exhaust/water control valve 23 to be opened, the gas in the water tank 6 is exhausted through the exhaust/water pipeline 21, the pressure of the cooling water pipeline is reduced, and the P value is increased; when P rises to within the normal range, the electromagnetic valve 12 is closed, and the exhaust is stopped. As the fuel cell is operated, the liquid level in the water tank 6 gradually rises, and when the exhaust/water control valve 23 is opened after the water tank is full, the exhaust/water control valve 23 starts to drain, that is, as long as the differential pressure P is too low, the exhaust/water control valve 23 starts to operate, and the exhaust/water line 21 can exhaust or drain.
Compared with the embodiment 1, the embodiment 2 does not need an external high-pressure air source, simplifies the flow, reduces the use of partial pipelines and valves and is beneficial to improving the reliability of the fuel cell system.
Example 3
As shown in fig. 3, in the fuel cell system with the water channel pressure regulating function in the present embodiment, the gas injection pipeline 20 is directly connected to the oxidant inlet 4a through the gas injection control valve 22, that is, the oxidant inlet gas with higher pressure is used as the high-pressure gas source for injecting gas into the water tank 6; the exhaust line 30 is directly connected to the oxidant inlet 4a intake line via an exhaust control valve 32 and a gas pump 31, and the exhaust control valve 32 and the gas pump 31 are interlocked, and the other configuration is the same as that of embodiment 1.
In contrast to embodiments 1 and 2, the exhaust line 30 does not directly exhaust the excess gas in the water tank 6, but rather directs the gas back to the oxidant inlet 4 a. Since the gas pressure at the oxidant inlet 4a is higher than the pressure in the water tank 6, an air pump 31 is provided in the exhaust line 30 to increase the gas pressure, and an exhaust control valve 32, which is controlled by the ECU, is provided in association with the air pump 31.
When the permeable bipolar plate fuel cell stack 1 runs, the ECU monitors the pressure difference P of the permeable plate of the permeable bipolar plate fuel cell stack 1 in real time through the pressure sensor connected with the oxidant and the cooling water waterway, wherein the normal range of P is 0.5-0.8 bar. When the ECU detects that the P value is higher than 0.8bar, air is required to be supplied to the cooling water path, the ECU controls the air injection control valve 22 to be opened at the moment, part of oxidant gas enters the water tank 6, the pressure of the cooling water path is increased, and the P value is reduced; when P falls within the normal range, the gas injection control valve 22 is closed, and gas injection is stopped. When the ECU detects that the P value is lower than 0.5bar, the cooling water waterway needs to be exhausted, the ECU controls the exhaust control valve 32 to be opened, the air pump 31 starts to operate at the same time, the air in the water tank 6 is pumped out and is exhausted into the pipeline of the oxidant inlet 4a, the pressure of the cooling water waterway is reduced, and the P value is increased; when P rises to within the normal range, the air pump 31 and the exhaust control valve 32 are closed, and the exhaust is stopped. During the operation of the permeable bipolar plate fuel cell stack 1, if the ECU detects that the liquid level in the water tank 6 is higher than a set value through the liquid level sensor 15, the drainage control valve 13 is opened, and the drainage pipeline 10 starts to drain water; and after the liquid level in the water tank 6 is recovered to be normal, the water discharge control valve 13 is closed, and the water discharge is stopped.
In the embodiment, only water is discharged to the external environment during the system operation, and no air is discharged, so that the waste of the reaction gas of the fuel cell can be avoided, and the high gas utilization rate of the fuel cell can be ensured.
Through the embodiments, the water path pressure regulating system of the water-permeable bipolar plate fuel cell can conveniently regulate the pressure of a cooling water path of the fuel cell, further control the pressure difference at two sides of the water permeable plate to be always in a reasonable range, protect the water permeable plate from being damaged, and normally drain and exhaust water; the system has simple and convenient flow, is easy to realize, is not influenced by the operating pressure of the fuel cell, and is very suitable for being applied to the high-pressure water permeable plate fuel cell.
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; while the invention has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A fuel cell system with a water channel pressure regulating function is characterized by comprising a water tank, a high-pressure gas source, a gas injection pipeline, a gas exhaust pipeline and a water discharge pipeline;
the water tank is arranged in a cooling water waterway of the fuel cell, the water tank is connected with an air injection pipeline, an exhaust pipeline and a water drainage pipeline, the air injection pipeline, the exhaust pipeline and the water drainage pipeline are relatively independent, and the independent opening and closing are realized by installing corresponding control valves on the pipelines respectively;
the gas injection pipeline is connected with a high-pressure gas source through a gas injection control valve, the exhaust pipeline is connected to the top of the water tank, an exhaust control valve is arranged on the exhaust pipeline, the exhaust pipeline is connected to the bottom of the water tank, a water exhaust control valve is arranged on the exhaust pipeline, and the gas injection control valve, the exhaust control valve and the water exhaust control valve are respectively connected with the fuel cell control system.
2. The fuel cell system with the water channel pressure regulating function as claimed in claim 1, wherein the high pressure gas source uses an external high pressure gas source or uses a fuel cell self reaction gas.
3. The fuel cell system with the water path pressure regulating function as claimed in claim 2, wherein the external high-pressure air source is nitrogen or air.
4. The fuel cell system with the water path pressure regulating function as claimed in claim 1, wherein the exhaust line and the water discharge line can be combined into an exhaust/water line, and connected to an exhaust/water control valve.
5. The fuel cell system with the water path pressure regulating function as claimed in claim 1, wherein the exhaust pipeline is directly connected with the air inlet pipeline of the fuel cell, the exhaust pipeline is connected with the air inlet pipeline of the fuel cell through an exhaust control valve and an air pump, and the exhaust control valve is linked with the air pump.
6. The fuel cell system with the waterway pressure regulating function according to claim 1, wherein the injection control valve, the exhaust control valve and the exhaust control valve employ electromagnetic valves whose pulse or opening degree is continuously regulated.
7. The fuel cell system with the water path pressure regulating function according to claim 1, wherein a liquid level sensor is arranged in the water tank and connected with a fuel cell control system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112254868A (en) * | 2020-09-09 | 2021-01-22 | 东风汽车集团有限公司 | Bipolar plate cooling liquid pressure drop measuring device and stack battery pack stacking method |
| CN113555583A (en) * | 2021-06-30 | 2021-10-26 | 东风汽车集团股份有限公司 | Exhaust method and exhaust device for fuel cell automobile cooling system |
| CN117976945A (en) * | 2024-03-28 | 2024-05-03 | 康明斯新能源动力(上海)有限公司 | Fuel cell system and control method thereof |
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| CN117976945A (en) * | 2024-03-28 | 2024-05-03 | 康明斯新能源动力(上海)有限公司 | Fuel cell system and control method thereof |
| CN117976945B (en) * | 2024-03-28 | 2024-07-19 | 康明斯新能源动力(上海)有限公司 | Fuel cell system and control method thereof |
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