CN114566676A - Automatic water replenishing system and shutdown water replenishing method for fuel cell - Google Patents
Automatic water replenishing system and shutdown water replenishing method for fuel cell Download PDFInfo
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- CN114566676A CN114566676A CN202210183819.0A CN202210183819A CN114566676A CN 114566676 A CN114566676 A CN 114566676A CN 202210183819 A CN202210183819 A CN 202210183819A CN 114566676 A CN114566676 A CN 114566676A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 259
- 239000000446 fuel Substances 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 80
- 239000000498 cooling water Substances 0.000 claims abstract description 44
- 239000008213 purified water Substances 0.000 claims abstract description 37
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 230000030279 gene silencing Effects 0.000 claims description 40
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 28
- 239000001257 hydrogen Substances 0.000 claims description 26
- 229910052739 hydrogen Inorganic materials 0.000 claims description 26
- 239000000110 cooling liquid Substances 0.000 claims description 19
- 230000001502 supplementing effect Effects 0.000 claims description 19
- 239000002826 coolant Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- 230000003020 moisturizing effect Effects 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 description 8
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- 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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
-
- 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
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention relates to an automatic water replenishing system and a shutdown water replenishing method for a fuel cell, wherein the system comprises: a water reservoir for storing tail discharge purified water generated by the reaction of the fuel cell; a sensor assembly for measuring liquid levels in the water reservoir and the fuel cell cooling water tank; the water replenishing loop is connected with the water receiver and the fuel cell cooling water tank, and when the water storage capacity in the water receiver is large and the water storage capacity of the fuel cell cooling water tank is insufficient, the water replenishing loop is communicated for automatically replenishing water; and the controller is connected with the sensor assembly and the water replenishing loop. Compared with the prior art, the invention improves the self-adaptability and the reliability of the operation of the fuel cell system.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to an automatic water replenishing system and a shutdown water replenishing method for a fuel cell.
Background
In the long-term operation process of the fuel cell system, because the cooling liquid is in a high-temperature state, certain evaporation loss exists, and meanwhile, the cooling liquid has certain pressure and can permeate and leak from a place with poor sealing, the cooling liquid needs to be supplemented in time to ensure the normal operation of the fuel cell system.
If insufficient cooling liquid appears in the operation process of the fuel cell system, the liquid level of the water tank is low, the system can give an alarm and remind, and the operation of supplementing the cooling liquid needs to be performed manually and actively.
The fuel cell coolant is generally deionized water or a special coolant, and because the price of the special coolant for the fuel cell is higher, the deionized water is generally adopted as the coolant for the fuel cell system in the regions with the temperature higher than zero all the year around in the south. The fuel cell system has insulation requirements in the operation process, the conductivity of deionized water is generally required to be lower than 20 mu s/cm, and meanwhile, a deionizer is additionally arranged on the system to adsorb metal ions of a cooling circuit of the system in real time, so that the conductivity of the cooling circuit is reduced, and the insulation is improved. The water replenishing mode needs frequent manual water replenishing, the requirement on the conductivity of deionized water is high, and the operation cost of a fuel cell system is greatly improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an automatic water replenishing system and a shutdown water replenishing method for a fuel cell.
The purpose of the invention can be realized by the following technical scheme:
an automatic water replenishing system for a fuel cell, comprising:
a water reservoir: tail exhaust purified water generated by the reaction of the fuel cell is stored;
a sensor assembly: for measuring the liquid levels in the reservoir and in the fuel cell cooling water tank;
a water replenishing loop: the water replenishing loop is communicated to automatically replenish water when the water storage capacity in the water storage device is large and the water storage capacity of the fuel cell cooling water tank is insufficient;
a controller: connect sensor subassembly and moisturizing return circuit.
Preferably, the water reservoir comprises a silencing water reservoir, the silencing water reservoir is positioned at the intersection of the air tail row and the hydrogen tail row, and the silencing water reservoir is a part integrating water storage, silencing and hydrogen dilution.
Preferably, the system further comprises a drain valve for active draining of the reservoir, said drain valve being connected to said controller, said reservoir being actively drained by said drain valve when there is a large amount of water in the reservoir and sufficient water in the fuel cell coolant tank.
Preferably, the water replenishing loop comprises a water replenishing pipeline connected with the water storage device and the fuel cell cooling water tank, a water replenishing electromagnetic valve and a water replenishing water pump are arranged in the water replenishing pipeline, and the water replenishing electromagnetic valve and the water replenishing water pump are both connected to the controller.
Preferably, the sensor assembly includes a water level sensor for sensing the water level in the reservoir.
Preferably, the sensor assembly comprises two cooling liquid level sensors for detecting the liquid level condition in the cooling water tank of the fuel cell, and the two cooling liquid level sensors are positioned at different liquid level height positions.
A fuel cell shutdown water replenishing method, the method comprising:
the tail discharge purified water generated by the reaction of the fuel cell is stored, the liquid levels of the fuel cell cooling water tank and the stored purified water are respectively judged in the shutdown process, and when the liquid level in the fuel cell cooling water tank is lower and the stored purified water is sufficient, the stored purified water is automatically supplemented into the fuel cell cooling water tank.
Preferably, the liquid level judgment and water supplement operation of the fuel cell cooling water tank and the stored purified water are performed every shutdown of the fuel cell.
Preferably, the tail discharge purified water is stored through a silencing water storage device, the silencing water storage device dilutes the discharged waste hydrogen of a fuel cell hydrogen gas circuit through a large amount of tail discharge air not consumed by a fuel cell to ensure the hydrogen safety concentration of the finally discharged tail gas, tail gas flow silencing is performed through mesh hole sites and pipe cavity expansion inside the silencing water storage device, tail liquid water is separated through the mesh hole sites of the silencing water storage device, and the liquid purified water is separated to a lower half cavity of the silencing water storage device to be stored.
Preferably, the method specifically comprises:
after the fuel cell is stopped and purged, detecting the liquid level of a cooling water tank of the fuel cell and the liquid level of stored purified water;
if the liquid level of the fuel cell cooling water tank is low and the liquid level of the stored purified water is high, supplementing the stored purified water to the fuel cell cooling water tank;
if the liquid level of the fuel cell cooling water tank is low but the liquid level of the stored purified water is low, automatic water replenishing cannot be performed;
if the liquid level of the fuel cell cooling water tank is higher but the liquid level of the stored purified water is higher, the stored purified water is actively discharged.
Compared with the prior art, the invention has the following advantages:
(1) the invention utilizes the characteristic that the pure water produced by the self reaction of the fuel cell is stored and automatically used for supplementing the cooling liquid of the fuel cell system, thereby reducing the operation of manually and actively supplementing the cooling liquid and improving the self adaptability and reliability of the system;
(2) the invention realizes the reuse of the pure water discharged from the tail of the fuel cell, realizes the cyclic utilization of resources and reduces the operation cost of the fuel cell.
Drawings
Fig. 1 is a schematic structural view of an automatic water replenishing system for a fuel cell in embodiment 1 of the present invention;
fig. 2 is a schematic flow chart of a fuel cell shutdown water replenishing method in embodiment 2 of the present invention.
In the figure, 1 is the module of supplying hydrogen, 2 is the fuel cell pile, 3 is hydrogen route water diversion circulation module, 4 is the hydrogen drainage drain valve, 5 is cooling water pump, 6 is the heat dissipation module, 7 is fuel cell cooling water tank, 8 is water tank upper portion level sensor, 9 is water tank lower part level sensor, 10 is the module of supplying air, 11 is the humidification module, 12 is the backpressure module, 13 is the amortization water receiver, 14 is the moisturizing solenoid valve, 15 is the moisturizing water pump, 16 is the drain valve, 17 is water storage level sensor.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.
Example 1
As shown in fig. 1, the present embodiment provides an automatic water replenishing system for a fuel cell, including:
a water reservoir: tail exhaust purified water generated by the reaction of the fuel cell is stored;
a sensor assembly: for measuring the level of liquid in the reservoir and in the fuel cell cooling water tank 7;
a water replenishing loop: the water storage device is connected with the fuel cell cooling water tank 7, and when the water storage amount in the water storage device is large and the water storage amount in the fuel cell cooling water tank 7 is insufficient, the water supplementing loop is communicated to automatically supplement water;
a controller: connect sensor subassembly and moisturizing return circuit.
The fuel cell sucks air in the atmosphere through the air supply module 10, dry air is humidified after entering the humidification module 11, and then enters the fuel cell stack 2 to perform electrochemical reaction to generate electric energy and heat energy. The back pressure module 12 and the supply module 10 cooperate to regulate the flow and pressure of the incoming air. The fuel cell system supplies hydrogen gas to the fuel cell stack 2 through the hydrogen supply module 1. The outlet of the hydrogen side of the fuel cell stack 2 enters the hydrogen path water diversion circulation module 3, and liquid water at the hydrogen side of the fuel cell system and nitrogen permeating to the hydrogen side from the air side can be effectively discharged by controlling the opening and closing of the hydrogen discharge valve 4. The fuel cell system circulates the cold area liquid of the cooling system through the cooling water pump 5, and the water temperature is controlled through the rotating speed of the cooling water pump 5 and the heat dissipation module 6. The cooling system water tank replenishes cooling water to the inlet end of the cooling water pump 5.
The sensor assembly includes a reservoir level sensor 17 for sensing the reservoir level of the reservoir. The sensor assembly comprises two cooling liquid level sensors for detecting the liquid level condition in the fuel cell cooling water tank 7, wherein the two cooling liquid level sensors are positioned at different liquid level heights and are respectively a water tank upper part liquid level sensor 8 and a water tank lower part liquid level sensor 9.
The water receiver includes amortization water receiver 13, and amortization water receiver 13 is located air tail row and hydrogen tail row intersection, and amortization water receiver 13 is the part that collects water, amortization and hydrogen and dilute as an organic whole.
The back end of the back pressure module 12 is connected with the front end of the silencing water storage device 13, and the air which is not completely reacted in the fuel cell stack 2 and the liquid water produced by the reaction are discharged into the silencing water storage device 13 through the back pressure module 12. The hydrogen gas discharge/discharge valve 4 discharges the liquid water discharged from the hydrogen gas side and the nitrogen gas permeated from the air side to the hydrogen gas side into the silencing water reservoir 13. The air side and hydrogen side tails are vented and the liquid water is mixed in the muffling reservoir 13 to reduce the hydrogen concentration that is ultimately vented out of the system. The mesh hole site and the pipe cavity expanding design arranged in the silencing water storage device 13 can be used for silencing tail gas flow, and liquid water is stored in the cavity structure through the mesh hole site in the silencing water storage device 13. Tail row pure water is saved through amortization water receiver 13, amortization water receiver 13 dilute the exhaust hydrogen waste of fuel cell hydrogen gas circuit through a large amount of tail row's air that is not consumed by fuel cell, guarantee the hydrogen safety concentration of final exhaust tail gas, amortization water receiver 13 is inside carries out afterbody air current amortization through netted hole site and lumen expansion, amortization water receiver net 13 form hole site separates afterbody liquid water, liquid pure water is separated to the lower half appearance chamber of amortization water receiver and is stored.
The system also includes a drain valve 16 for active draining of the reservoir, the drain valve 16 being connected to the controller such that when the reservoir has a large volume of water and the fuel cell coolant tank 7 has sufficient water, the reservoir actively drains through the drain valve 16 into the tail pipe.
The water supplementing loop comprises a water supplementing pipeline which is connected with the water storage device and the fuel cell cooling water tank 7, a water supplementing electromagnetic valve 14 and a water supplementing water pump 15 are arranged in the water supplementing pipeline, and the water supplementing electromagnetic valve 14 and the water supplementing water pump 15 are both connected to the controller. By opening the water replenishing loop electromagnetic valve, the water replenishing pump 15 pumps the purified water stored in the silencing water receiver 13 into the water tank of the cooling system for replenishing the cooling liquid required by the cooling system.
The invention utilizes the characteristic that the pure water produced by the self reaction of the fuel cell is stored and automatically used for supplementing the cooling liquid of the fuel cell system, thereby reducing the operation of manually and actively supplementing the cooling liquid and improving the self-adaptability and the reliability of the system. Meanwhile, the resource recycling is realized, and the operation cost of the fuel cell is reduced.
Example 2
Based on the automatic water replenishing system for the fuel cell in embodiment 1, the present embodiment provides a method for replenishing water when the fuel cell is stopped, where the method includes:
the tail exhaust purified water generated by the reaction of the fuel cell is stored, the liquid levels of the fuel cell cooling water tank 7 and the stored purified water are respectively judged in the shutdown process, and when the liquid level in the fuel cell cooling water tank 7 is lower and the stored purified water is sufficient, the stored purified water is automatically supplemented into the fuel cell cooling water tank 7.
The fuel cell is stopped every time, and the liquid level judgment and the water supplementing operation of the fuel cell cooling water tank 7 and the stored purified water are carried out.
Tail row of pure water is saved through amortization water receiver 13, amortization water receiver 13 dilutes the exhaust hydrogen waste of fuel cell hydrogen gas circuit through a large amount of tail exhaust air that is not consumed by fuel cell, guarantee the hydrogen safety concentration of final exhaust tail gas, 13 inside tail gas flow amortization is carried out through netted hole site and lumen expansion in amortization water receiver, 13 netted hole sites in amortization water receiver separate the liquid water of afterbody, liquid pure water is stored to the lower half appearance chamber of amortization water receiver 13 by separating.
With reference to fig. 2, the method provided in this embodiment specifically includes:
and S1, after the fuel cell system receives the normal shutdown command, starting to enter a shutdown program.
And S2, normally purging the fuel cell system in the shutdown process, and blowing away cold liquid water of the electric pile to ensure the next normal start.
And S3, judging the liquid level of the water tank of the cooling system after the purging process is finished.
If the liquid level is above the upper tank level sensor 8, the liquid level is normal, and the process proceeds to S9.
If the liquid level is between the upper tank level sensor 8 and the lower tank level sensor 9, which is the lower level, the process proceeds to S4.
If the liquid level is below the liquid level sensor 9 at the lower part of the water tank and the liquid level is insufficient, a liquid level insufficient signal is fed back to the control system.
It should be noted that, after the fuel cell system is powered on, the liquid level sensor 9 at the lower part of the water tank will monitor in real time and feed back in the whole process. Of course, an under-level condition will not generally occur unless a large amount of coolant leaks for a short period of time.
And S4, judging the liquid level condition of the silencing water storage device 13 when the liquid level of the water tank is lower. If the liquid level in the silent reservoir 13 is below the level sensor, the liquid level is low and S8 is entered. If the level of the silent reservoir 13 is above the level sensor, which is a high level, the process proceeds to S5.
And S5, opening the electromagnetic valve of the water supplementing loop, rotating the water supplementing water pump 15, and pumping the purified water stored in the silencing water storage device 13 into the water tank of the cooling system by utilizing pumping force to supplement the cooling liquid.
And S6, monitoring liquid level sensors in the system water tank and the silencing water storage device 13 at the same time, and entering S7 when the liquid level in the system water tank is normal or the liquid level in the silencing water storage device 13 is lower.
And S7, stopping the water replenishing operation, and closing the water replenishing loop electromagnetic valve and the water replenishing water pump 15.
S8, when the liquid level in the silencing water reservoir 13 is judged to be low in the process of S4, it indicates that the interior of the silencer does not store enough pure water for supplementing the cooling liquid. This may be because the stored water evaporates after the last shutdown of the system emptied the stored water in the silent reservoir 13 below the level sensor, or the silent reservoir 13 has a leak. At this time, the process proceeds to S8, where a signal indicating that the tank level is low and water cannot be supplied is fed back, and the process proceeds to S15.
And S9, further judging whether the liquid level in the sound attenuation water storage device 13 is higher. If the liquid level in the silencing water reservoir 13 is higher than the liquid level sensor, the process goes to S10, and the emptying process of the silencing water reservoir 13 needs to be performed. If the liquid level in the silent water reservoir 13 is below the liquid level sensor, which is low, the silent water reservoir 13 does not have enough stored water and does not need the emptying process, and the process proceeds to S15.
And S10, feeding back a high liquid level signal in the silencing water storage device 13, requesting whether to actively drain water or not, and waiting for a certain time.
S11, waiting whether there is active drainage signal input from outside, if the drainage signal is received, entering S12, if the drainage signal is not received, entering S14.
And S12, opening the drain valve 16 of the silencing water storage device 13, and discharging the internal stored water to a system tail discharge pipe.
And S13, judging the liquid level state in the silencing water storage device 13 until the liquid level is lower than the liquid level sensor of the silencing water storage device 13, and entering S14.
S14, the drain valve 16 of the silencing water reservoir 13 is closed.
And S15, powering down the system normally.
And S16, ending the system shutdown.
The automatic water replenishing system and the shutdown water replenishing method for the fuel cell can store the purified water generated by the reaction of the fuel cell, judge whether the system cooling liquid needs to be replenished or not on line in the shutdown process after the operation is finished every time, provide water replenishing operation, and finally perform emptying treatment on the stored water according to the liquid level in the silencing water storage device 13, thereby improving the self-adaptability and the reliability of the operation of the fuel cell system.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (10)
1. An automatic water replenishing system for a fuel cell, comprising:
a water reservoir: tail exhaust purified water generated by the reaction of the fuel cell is stored;
a sensor assembly: for measuring the liquid levels in the reservoir and in the fuel cell cooling water tank;
a water replenishing loop: the water replenishing loop is communicated to automatically replenish water when the water storage capacity in the water storage device is large and the water storage capacity of the fuel cell cooling water tank is insufficient;
a controller: connect sensor subassembly and moisturizing return circuit.
2. The automatic water replenishing system for the fuel cell according to claim 1, wherein the water reservoir comprises a silencing water reservoir, the silencing water reservoir is located at the intersection of the air tail and the hydrogen tail, and the silencing water reservoir is an integrated part for water collection, silencing and hydrogen dilution.
3. The automatic water replenishment system for a fuel cell as claimed in claim 1 further comprising a drain valve for active draining of the reservoir, said drain valve being connected to said controller, said reservoir being actively drained by said drain valve when there is a large volume of water in the reservoir and there is sufficient water in the fuel cell coolant tank.
4. The automatic water replenishing system for the fuel cell according to claim 1, wherein the water replenishing circuit comprises a water replenishing pipeline connecting the water reservoir and the cooling water tank of the fuel cell, a water replenishing solenoid valve and a water replenishing water pump are arranged in the water replenishing pipeline, and the water replenishing solenoid valve and the water replenishing water pump are both connected to the controller.
5. The automatic water refill system for a fuel cell as claimed in claim 1, wherein said sensor assembly includes a reservoir level sensor for sensing the reservoir level of the reservoir.
6. The automatic water replenishing system for the fuel cell as claimed in claim 1, wherein the sensor assembly comprises two cooling liquid level sensors for detecting the liquid level condition in the cooling water tank of the fuel cell, and the two cooling liquid level sensors are located at different liquid level heights.
7. A fuel cell shutdown water replenishing method is characterized by comprising the following steps:
the tail discharge purified water generated by the reaction of the fuel cell is stored, the liquid levels of the fuel cell cooling water tank and the stored purified water are respectively judged in the shutdown process, and when the liquid level in the fuel cell cooling water tank is lower and the stored purified water is sufficient, the stored purified water is automatically supplemented into the fuel cell cooling water tank.
8. The method of claim 7, wherein the fuel cell is stopped and water is replenished with the liquid level of the cooling water tank and the stored pure water of the fuel cell.
9. The shutdown water replenishing method of the fuel cell as claimed in claim 7, wherein the tail discharge purified water is stored by a silencing water reservoir, the silencing water reservoir dilutes the discharged waste hydrogen of the hydrogen path of the fuel cell by a large amount of tail discharge air which is not consumed by the fuel cell to ensure the hydrogen safety concentration of the finally discharged tail gas, tail gas flow silencing is performed inside the silencing water reservoir through mesh hole sites and pipe cavity expansion, tail liquid water is separated by the mesh hole sites of the silencing water reservoir, and the liquid purified water is separated to a lower half cavity of the silencing water reservoir to be stored.
10. The shutdown water replenishing method of the fuel cell according to claim 7, characterized by comprising the following steps:
after the fuel cell is stopped and purged, detecting the liquid level of a cooling water tank of the fuel cell and the liquid level of stored purified water;
if the liquid level of the fuel cell cooling water tank is low and the liquid level of the stored purified water is high, supplementing the stored purified water to the fuel cell cooling water tank;
if the liquid level of the fuel cell cooling water tank is low but the liquid level of the stored purified water is low, automatic water replenishing cannot be performed;
if the liquid level of the fuel cell cooling water tank is higher but the liquid level of the stored purified water is higher, the stored purified water is actively discharged.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117117243A (en) * | 2023-10-25 | 2023-11-24 | 佛山市清极能源科技有限公司 | Fuel cell system cooling liquid conductivity balance control system and method |
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