CN107394235B - Fuel cell auxiliary system - Google Patents
Fuel cell auxiliary system Download PDFInfo
- Publication number
- CN107394235B CN107394235B CN201710571415.8A CN201710571415A CN107394235B CN 107394235 B CN107394235 B CN 107394235B CN 201710571415 A CN201710571415 A CN 201710571415A CN 107394235 B CN107394235 B CN 107394235B
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- air
- fuel cell
- supply system
- hydrogen
- cooling
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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
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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
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
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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 invention provides a fuel cell auxiliary system, which utilizes the principle that an actuating mechanism in a hydrogen supply system and a cooling system is positively correlated with power output of a galvanic pile, and realizes synchronous control of rotating speed of the actuating mechanism (a circulating pump) by sharing two driving motors in the two systems, thereby reducing one set of motor driving system, improving power of the motor and integration level of the system, optimizing system efficiency, simplifying control strategy, reducing volume and cost and increasing reliability of the system.
Description
Technical Field
The present disclosure relates to fuel cell systems, and particularly to an auxiliary fuel cell system.
Background
A fuel cell is a device capable of directly converting chemical energy stored in fuel into electric energy through an electrochemical reaction. As long as fuel (typically hydrogen) and oxidant (typically air) are continuously supplied on the anode side and the cathode side, it can continuously output electric energy to the outside through oxidation-reduction reaction. Unlike a typical rechargeable battery (e.g., a lithium battery), a single fuel cell or fuel cell stack unit is inoperable, and requires a complex auxiliary system to cooperate with it to form a fuel cell power generation system to generate electricity externally. Besides the fuel cell stack, a hydrogen system, an air system, a cooling system, a control system for assisting in multiparty coordination and the like are also generally included, and main components include an air compressor, a cooling water pump, a hydrogen circulating pump and the like.
The hydrogen system is one of the important subsystems of the fuel cell power generation system, and provides the required hydrogen with a certain pressure and flow rate for the fuel cell power generation. In order to ensure that hydrogen is uniformly distributed on the anode side of the electric pile, the phenomenon of undergassing of the fuel cell in the power generation process is prevented, the service life of the electric pile is influenced, and a hydrogen supply subsystem generally transmits more fuel than stoichiometric ratio into the electric pile to participate in the reaction. In order to improve the utilization rate of hydrogen and the operation safety of a cell stack, the residual hydrogen in the reaction is not directly discharged into the atmosphere, but the unreacted hydrogen in a hydrogen loop is directly pumped back to an anode side inlet from an anode side outlet of the fuel cell stack by using a hydrogen circulating pump, and the unreacted hydrogen is merged with the freshly injected reaction gas at the inlet and then enters the fuel cell to participate in the reaction again.
The cooling system is another important system of the fuel cell, the efficiency of the fuel cell is generally about 50%, the fuel cell cannot conduct and radiate outwards like an automobile engine, the sensitivity of the proton exchange membrane to temperature is added, the heat rejection temperature of the battery is low, the heat rejection requirement is about 2-3 times of that of the automobile engine, and the heat rejection requirement is very high. A larger flow rate of the cooling system is required. In addition, in order to balance the pressure balance of the hydrogen, the air and the cooling liquid, the cooling water pump in the cooling system has a larger pressure requirement.
The air system needs to ensure that the oxygen content in the air of the fuel cell stack is sufficient to support the oxyhydrogen reaction, and in order to obtain higher power energy density and better performance, the air supply pressure (i.e. the partial pressure of oxygen) of the air must be increased, so that the increase of the air supply pressure of the fuel cell can also reduce the size of the system, improve the efficiency of the cell stack and improve the water balance. In a proton exchange membrane fuel cell system for a vehicle, the typical operating pressure range of the system is 1-3 bar, and the flow rate range is 100-300 kg/h, which is realized by a high-efficiency air compressor.
The air compressor, the cooling water pump and the hydrogen circulating pump in the existing fuel cell system are all driven by independent motors and controllers, a plurality of sets of motors are used for driving, the system is complex, the cost is high, the space arrangement of the whole vehicle is not facilitated, and the system efficiency is low.
Disclosure of Invention
The invention provides a fuel cell auxiliary system, which enables a hydrogen supply system and a cooling system to respectively realize internal circulation of hydrogen and cooling water by controlling respective actuating mechanisms through a shared motor, improves the integration level of the system, optimizes the efficiency of the system, simplifies a control strategy, reduces the volume and the cost of the system and also increases the reliability of the system.
In order to achieve the technical purpose, the invention provides a fuel cell auxiliary system which comprises a galvanic pile, a hydrogen supply system, an oxygen supply system and a cooling system, wherein the hydrogen supply system, the oxygen supply system and the cooling system respectively circularly convey hydrogen, air and cooling water for the galvanic pile, and the hydrogen supply system and the cooling system respectively control respective executing mechanisms to respectively realize internal circulation of the hydrogen and the cooling water through a shared motor.
Further, the executing mechanism is a circulating pump.
Further, the fuel cell auxiliary system further includes a first controller for controlling the rotational speed of the common motor.
Further, the hydrogen supply system further comprises an air inlet pipeline and an air outlet pipeline, one ends of the air inlet pipeline and the air outlet pipeline are communicated with the electric pile, the other end of the air outlet pipeline is connected into the air inlet pipeline, and an executing mechanism in the hydrogen supply system is arranged in the air outlet pipeline.
Further, the oxygen supply system comprises an air inlet pipeline, an air exhaust pipeline and an air compression system, wherein one ends of the air inlet pipeline and the air exhaust pipeline are communicated with the electric pile, the other end of the air exhaust pipeline is positioned outside the electric pile, and the air compression system is used for sending air into the electric pile through the air inlet pipeline.
Further, the air compression system comprises an oxygen supply system motor and an air compressor, wherein the air compressor is arranged in the air inlet pipeline, and the oxygen supply system motor is used for controlling the air compressor to send air into the electric pile.
Further, the air compression system further comprises a second controller, and the second controller is used for controlling the rotating speed of the motor of the oxygen supply system.
Further, the cooling system further comprises a water inlet pipeline and a water outlet pipeline, one ends of the water inlet pipeline and the water outlet pipeline are communicated with the electric pile, the other end of the water outlet pipeline is connected into the water inlet pipeline, and an executing mechanism in the cooling system is arranged in the water outlet pipeline.
Further, the cooling system further comprises a thermostat and a fan, two branches are arranged at the other end of the water outlet pipeline, one branch is connected to the first end of the thermostat, the other branch is connected to the second end of the thermostat after being cooled by the fan, and the third end of the thermostat is connected to the other end of the water inlet pipeline.
Furthermore, the hydrogen supply system, the cooling system and the oxygen supply system respectively realize the internal circulation of hydrogen, cooling water and air by controlling the respective executing mechanisms through the common motor.
Compared with the prior art, the invention has the following beneficial effects:
the fuel cell auxiliary system provided by the invention utilizes the principle that an actuating mechanism in a hydrogen supply system and a cooling system is positively correlated with the power output of a galvanic pile, namely, in the rotating speed control, the rotating speeds of circulating pumps of the hydrogen supply system and the cooling system can show a certain linear correlation, and by sharing two driving motors in the two systems, the synchronous control of the rotating speeds of the actuating mechanism (the circulating pump) is realized, one set of motor driving system is reduced, the power of the motors and the integration level of the system are improved, the system efficiency is optimized, the control strategy is simplified, the volume and the cost are reduced, and the reliability of the system is also increased.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a fuel cell auxiliary system according to an embodiment of the present invention.
In the case of the view of figure 1,
1: a galvanic pile; 2: a common motor; 31. 32: an actuator; 4: a first controller; 5: an air intake line; 6: an air outlet pipeline; 7: an air inlet pipeline; 8: an exhaust pipeline; 9: an oxygen supply system motor; 10: an air compressor; 11: a second controller; 12: a water inlet pipeline; 13: a water outlet pipeline; 14: a thermostat; 15: a fan.
Detailed Description
The fuel cell auxiliary system according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. Advantages and features of the invention will become more apparent from the following description and from the claims. It is noted that the drawings are in a very simplified form and utilize non-precise ratios, and are intended to facilitate a convenient, clear, description of the embodiments of the invention.
The invention provides a fuel cell auxiliary system, which utilizes the principle that an actuating mechanism in a hydrogen supply system and a cooling system is positively correlated with power output of a galvanic pile, and realizes synchronous control of rotating speed of the actuating mechanism (a circulating pump) by sharing two driving motors in the two systems, thereby reducing a set of motor driving systems, improving power of the motors and integration level of the systems, optimizing system efficiency, simplifying control strategies, reducing volume and cost and improving reliability of the system.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an auxiliary fuel cell system according to an embodiment of the invention.
As shown in fig. 1, an embodiment of the present invention provides a fuel cell auxiliary system, which includes a stack 1, a hydrogen supply system, an oxygen supply system, and a cooling system, wherein the hydrogen supply system, the oxygen supply system, and the cooling system respectively circulate and convey hydrogen, air, and cooling water for the stack 1, and the hydrogen supply system and the cooling system respectively control respective actuators 31, 32 through a common motor 2 to respectively implement internal circulation of the hydrogen and the cooling water.
Further, the actuators 31 and 32 are circulation pumps, and the circulation pumps drive the hydrogen and the cooling water to realize the circulation supply of the electric pile 1 in the corresponding pipelines.
Further, the fuel cell auxiliary system further includes a first controller 4, and the first controller 4 is configured to control the rotation speed of the common motor 2, thereby controlling the output of the actuators 31, 32 to regulate the flow rates of the hydrogen gas and the cooling water.
Further, the hydrogen supply system further comprises an air inlet pipeline 5 and an air outlet pipeline 6, one ends of the air inlet pipeline 5 and the air outlet pipeline 6 are communicated with the electric pile 1, the other end of the air outlet pipeline 6 is connected into the air inlet pipeline 5, and an executing mechanism 31 in the hydrogen supply system is arranged between the air outlet pipeline 6 and the air inlet pipeline 5. After the hydrogen enters the electric pile 1 from the air inlet pipeline 5, the hydrogen with excessive metering ratio is discharged from the air outlet pipeline 6, and the executing mechanism 31 is used for sending the discharged hydrogen with excessive metering ratio into the air inlet pipeline 5 again so as to enter the electric pile 1 again for re-reaction.
Further, the oxygen supply system comprises an air inlet pipeline 7, an air exhaust pipeline 8 and an air compression system, one ends of the air inlet pipeline 7 and the air exhaust pipeline 8 are communicated with the electric pile 1, the other end of the air exhaust pipeline 8 is located outside the electric pile 1, and the air compression system is used for feeding air into the electric pile 1 through the air inlet pipeline 7. Air enters the pile 1 from the air inlet pipeline 7, and after the reaction, the redundant air is discharged from the pile 1 from the exhaust pipeline 8.
Further, the air compression system comprises an oxygen supply system motor 9 and an air compressor 10, the air compressor 10 is arranged in the air inlet pipeline 7, and the oxygen supply system motor 9 is used for controlling and driving the air compressor 10 to send air into the electric pile 1.
Further, the air compression system further comprises a second controller 11, and the second controller 11 is used for controlling the rotating speed of the oxygen supply system motor 9, so as to control the output of the oxygen supply system motor 9, and regulate the flow and pressure of air.
Further, the cooling system further comprises a water inlet pipeline 12 and a water outlet pipeline 13, one ends of the water inlet pipeline 12 and the water outlet pipeline 13 are communicated with the electric pile 1, the other end of the water outlet pipeline 13 is connected into the water inlet pipeline 12, and an executing mechanism 32 in the cooling system is arranged in the water outlet pipeline 13. Cooling water enters the electric pile 1 from the water inlet pipeline 12, after heat exchange with the fuel cell module in the electric pile 1, the cooling water is discharged from the water outlet pipeline 13, and the actuating mechanism 32 is used for circularly feeding the discharged cooling water into the water inlet pipeline 12 again to enter the electric pile 1 so as to achieve the cooling purpose.
Further, the cooling system further includes a thermostat 14 and a fan 15, the other end of the water outlet pipeline 13 has two branches, one branch is connected to the first end of the thermostat 14, the other branch is connected to the second end of the thermostat 14 after being cooled by the fan 15, and the third end of the thermostat 14 is connected to the other end of the water inlet pipeline 12. The first end and the second end of the thermostat 14 are respectively connected with cooling water with higher temperature and cooling water cooled by the fan 15, and after the cooling water is regulated, cooling water with proper temperature is sent out from the third end of the thermostat 14 to efficiently cool the reaction in the electric pile 1. The principle of the thermostat 14 is the prior art, and thus will not be described in detail herein.
It is conceivable that, when the air compressor 10 of the oxygen supply system is used as ventilation or the motor speeds of the hydrogen supply system, the oxygen supply system and the cooling system can exhibit a certain linear dependence by improving the design, the oxygen supply system can also control the respective actuators together with the hydrogen supply system and the cooling system by the common motor 2 to realize the internal circulation of air, hydrogen and cooling water respectively, i.e. the oxygen supply system motor 9 is the same driving motor as the common motor 2, whereas when this linear dependence is not significant, the actuators of the oxygen supply system can be disconnected by adding a clutch to control them individually. The design can better improve the integration level of the system, simplify the control strategy and increase the reliability of the system, so the invention also aims to comprise the technical scheme.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and the equivalents thereof, the present invention is intended to include such modifications and variations.
Claims (10)
1. The auxiliary system for the fuel cell is characterized by comprising a pile, a hydrogen supply system, an oxygen supply system and a cooling system, wherein the hydrogen supply system, the oxygen supply system and the cooling system respectively circulate and convey hydrogen, air and cooling water for the pile, and the hydrogen supply system and the cooling system respectively realize internal circulation of the hydrogen and the cooling water by controlling respective executing mechanisms through a shared motor.
2. The fuel cell auxiliary system according to claim 1, wherein the actuator is a circulation pump.
3. The fuel cell assist system of claim 1 further comprising a first controller for controlling a rotational speed of the common motor.
4. A fuel cell auxiliary system according to any one of claims 1 to 3 wherein the hydrogen supply system further comprises an inlet pipe and an outlet pipe, one ends of the inlet pipe and the outlet pipe are both in communication with the stack, the other end of the outlet pipe is connected to the inlet pipe, and an actuator in the hydrogen supply system is disposed in the outlet pipe.
5. A fuel cell auxiliary system according to any one of claims 1 to 3 wherein the oxygen supply system comprises an inlet air duct, an exhaust air duct and an air pressure system, one end of each of the inlet air duct and the exhaust air duct being in communication with the stack, the other end of the exhaust air duct being located outside the stack, the air pressure system being arranged to supply air into the stack through the inlet air duct.
6. The fuel cell auxiliary system according to claim 5, wherein the air compression system comprises an oxygen supply system motor and an air compressor, the air compressor being disposed in the air intake duct, the oxygen supply system motor being configured to control the air compressor to send air into the stack.
7. The fuel cell auxiliary system according to claim 6, wherein the air pressure system further comprises a second controller for controlling a rotational speed of the oxygen supply system motor.
8. A fuel cell auxiliary system according to any one of claims 1 to 3 wherein the cooling system further comprises a water inlet pipe and a water outlet pipe, one end of each of the water inlet pipe and the water outlet pipe being in communication with the stack, the other end of the water outlet pipe being connected to the water inlet pipe, and an actuator in the cooling system being disposed in the water outlet pipe.
9. The fuel cell auxiliary system according to claim 8 wherein the cooling system further comprises a thermostat and a fan, the other end of the water outlet line having two branches, one branch being connected to a first end of the thermostat and the other branch being connected to a second end of the thermostat after being cooled by the fan, and the third end of the thermostat being connected to the other end of the water inlet line.
10. The fuel cell auxiliary system according to claim 1, wherein the hydrogen supply system, the cooling system and the oxygen supply system respectively realize internal circulation of hydrogen, cooling water and air by controlling respective actuators through the common motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571415.8A CN107394235B (en) | 2017-07-13 | 2017-07-13 | Fuel cell auxiliary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571415.8A CN107394235B (en) | 2017-07-13 | 2017-07-13 | Fuel cell auxiliary system |
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| CN107394235A CN107394235A (en) | 2017-11-24 |
| CN107394235B true CN107394235B (en) | 2023-06-30 |
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| CN201710571415.8A Active CN107394235B (en) | 2017-07-13 | 2017-07-13 | Fuel cell auxiliary system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019234844A1 (en) * | 2018-06-06 | 2019-12-12 | 三菱電機株式会社 | Car for elevator |
| CN110391444A (en) * | 2019-06-27 | 2019-10-29 | 武汉格罗夫氢能汽车有限公司 | A kind of fuel battery engine system Integrated Solution |
| CN114665123B (en) * | 2022-03-23 | 2023-10-03 | 佛山仙湖实验室 | Fuel cell stack and control system thereof |
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| CN1849724A (en) * | 2003-07-10 | 2006-10-18 | 通用电气公司 | Hydrogen storage-based rechargeable fuel cell system |
| CN106784960A (en) * | 2016-12-30 | 2017-05-31 | 上海恒劲动力科技有限公司 | A kind of integral type reversible fuel cell system |
| CN206893718U (en) * | 2017-07-13 | 2018-01-16 | 上海重塑能源科技有限公司 | Fuel cell accessory system |
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2017
- 2017-07-13 CN CN201710571415.8A patent/CN107394235B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7045232B1 (en) * | 1998-05-20 | 2006-05-16 | Volkswagen Ag | Fuel cell system and method for producing electric energy using a fuel cell system |
| CN1849724A (en) * | 2003-07-10 | 2006-10-18 | 通用电气公司 | Hydrogen storage-based rechargeable fuel cell system |
| CN1770526A (en) * | 2004-11-02 | 2006-05-10 | 上海神力科技有限公司 | Fuel cell generating system capable of realizing self-starting without external power help |
| CN2775854Y (en) * | 2004-11-11 | 2006-04-26 | 上海神力科技有限公司 | Motor driving and control device for supporting fuel cell self operation power consumption parts |
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