CN101356674A - Fuel cell system and cooling control method thereof - Google Patents
Fuel cell system and cooling control method thereof Download PDFInfo
- Publication number
- CN101356674A CN101356674A CNA2007800011377A CN200780001137A CN101356674A CN 101356674 A CN101356674 A CN 101356674A CN A2007800011377 A CNA2007800011377 A CN A2007800011377A CN 200780001137 A CN200780001137 A CN 200780001137A CN 101356674 A CN101356674 A CN 101356674A
- Authority
- CN
- China
- Prior art keywords
- cooling water
- temperature
- fuel battery
- fuel cell
- cell system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- H01M8/04537—Electric variables
- H01M8/04544—Voltage
- H01M8/04559—Voltage of fuel cell stacks
-
- 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
-
- 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
- H01M8/04082—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
-
- 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
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
-
- 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
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04358—Temperature; Ambient temperature of the coolant
-
- 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
- H01M8/04768—Pressure; Flow of the coolant
-
- 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
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
- H01M8/0612—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants from carbon-containing material
- H01M8/0618—Reforming processes, e.g. autothermal, partial oxidation or steam reforming
-
- 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
- H01M8/10—Fuel cells with solid electrolytes
- H01M2008/1095—Fuel cells with polymeric electrolytes
-
- 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
- H01M8/04059—Evaporative processes for the cooling of a fuel cell
-
- 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
Landscapes
- 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 present invention relates to a fuel cell system, and to a cooling control method of the fuel cell system. The cooling control method of the fuel cell system includes measuring a voltage generated from the fuel cell stack in accordance with a time variation, and maintaining an internal temperature of the fuel cell stack at a predetermined value in accordance with the measured voltage. The method may further include controlling a cooling water temperature difference. Herein, when the measured voltage is equal to or greater than a predetermined value, the cooling water is normally supplied, and when the measured voltage is less than the predetermined value, a difference between cooling water inlet and outlet temperatures of the fuel cell stack is varied by a controller. The deterioration of the power generation performance due to the excessive moisture in the fuel cell stack can be prevented and thus the power generation can be effectively realized through the electrochemical reaction.
Description
Technical field
The present invention relates to a kind of fuel cell system that utilizes proton exchange membrane fuel cell (PEMFC).Especially, the present invention relates to the cooling control method of a kind of fuel cell system and this fuel cell system, this fuel cell system is by the moisture in the electrode layer of removing fuel battery effectively or provide reacting gas can produce stable electric energy to fuel battery effectively.
Background technology
PEMFC utilizes has the proton exchange membrane of hydrogen ion commutativity as electrolytic membrane.This PEMFC contains the fuel gas of hydrogen by utilization and the electrochemical reaction that contains between the air of oxygen produces electric energy and heat energy.This PEMFC has the ability of quick startup and can be designed to small size.Therefore, this PEMFC has been widely used in the various fields, for example the hot power plant of compact power, automobile power source and dwelling house.
As everyone knows, utilize the fuel cell system of this PEMFC to comprise fuel battery, fuel, electric pressure converter and heat recovery unit usually.Fuel cell system reformation (reform) electricity generation material arrives the anode of fuel battery so that hydrogen to be provided.This fuel cell system utilizes air blast air to be provided to the negative electrode of fuel battery.Then, on the electrode layer of fuel battery, produce electrochemical reaction, thereby produce electric energy.Here, the formula of electrochemical reaction is as follows.
Anode: H
2(g) → 2H
++ 2e
-
Negative electrode: 1/2O
2(g)+2H
++ 2e
-→ H
2O (1)
Cell reaction: H
2(g)+1/2O
2(g) → H
2O (1)
The electrochemical reaction of fuel cell system occurs on the three-phase contact surface that electrode layer (comprising catalyst), electrolyte and reacting gas meet simultaneously.Electrode layer has been brought into play important effect in the moisture of the diffusion of reacting gas and electrolyte is supplied with.In order to regulate the moisture that produces in the electrode layer, regulate middle-sized hole and undersized hole discharges moisture by adding that the functional polymer regulates water-wet behavior or controlling by the density of electrode.
Yet when fuel cell start-up or when stopping, large quantity of moisture may be provided to the electrode layer of fuel battery.In addition, even be driven in nominal operation state following time when this fuel cell system, moisture may be supplied to excessively, and perhaps it may will suffer the scarcity of moisture.Therefore, the difficulty of this fuel cell system is stably to keep the performance of electric energy generation.
The disclosed above-mentioned information of this background parts is just in order to increase the understanding to background of the present invention, so it may be included in the information that not have prior art that formation knows for those skilled in the art already in this country.
Open
Technical problem
Embodiments of the invention provide a kind of fuel cell system, improve this fuel cell system so that reacting gas (oxygen and hydrogen) to be provided effectively by the moisture in the hole of removing the electrode layer that is present in fuel battery in a large number and gas diffusion layers.Embodiments of the invention also provide a kind of cooling control method of fuel cell system.
Summary of the invention
In a preferred embodiment of the present invention, fuel cell system comprises: the fuel battery that electrochemical reaction wherein takes place; Hydrogen is offered the fuel of fuel battery by the reformation electricity generation material; The oxygen feed unit that provides oxygen to arrive fuel battery; Utilize cooling water to absorb the cooling unit of heat from fuel battery; Reclaim the heat recovery unit of used heat from cooling water; Voltage detector according to the supply voltage in the time change-detection fuel battery; And the temperature that will flow to the cooling water of fuel battery when the voltage that detects according to voltage detector is when remaining within the predetermined scope, and the response time changes the controller that changes difference between cooling water inlet and the outlet temperature.
In another preferred embodiment of the present invention, a kind of cooling means of fuel battery of fuel cell system comprises: the voltage that produces according to time measure of the change fuel battery, and the internal temperature of fuel battery is remained on predetermined value according to this voltage that records.This method also comprises, controls the temperature difference of cooling water after keeping internal temperature.Here, when the voltage that records during more than or equal to predetermined value, normally provide cooling water, when the voltage that records during less than predetermined value, the cooling water inlet of fuel battery and the difference between the outlet temperature change by controller.
In addition, keep internal temperature can comprise according to the time change determine the voltage that records reduced rate whether within predetermined scope, and the internal temperature of fuel battery is remained on predetermined value according to definite result of reduced rate flow velocity by regulating cooling water.
In addition, the difference of control cooling water is carried out by the process of alternately carrying out the increase flow velocity and the process that reduces flow velocity, allow the difference between cooling water inlet and the outlet temperature to reach first scope thereby increase flow velocity, allow reaching second scope through the difference between cooling water inlet after the scheduled time and the outlet temperature thereby reduce flow velocity.
In addition, keep internal temperature can comprise according to the time change determine the voltage that records reduced rate whether within predetermined scope, and carry out heat exchange by the outlet cooling water that allows fuel battery according to definite result of reduced rate, perhaps do not allow the outlet cooling water of fuel battery to carry out heat exchange, but directly cooling water is directed to and makes the internal temperature of fuel battery remain on predetermined value in the fuel battery by changing the recuperation of heat path.
Beneficial effect
In the cooling control method of fuel cell system and this fuel cell system according to the preferred embodiment of the invention, because the moisture that is present on electrode layer and the gas diffusion layers is discharged effectively, therefore can prevent because the damage that too much moisture causes in the fuel battery, and can realize power generation process effectively by electrochemical reaction thus power generation performance.
Description of drawings
Fig. 1 is the schematic diagram according to the fuel cell system of first preferred embodiment of the invention.
Fig. 2 is the flow chart of cooling control method of the fuel cell system of diagram Fig. 1.
Fig. 3 is the schematic diagram according to the fuel cell system of second preferred embodiment of the invention.
Fig. 4 is the flow chart of cooling control method of the fuel cell system of diagram Fig. 3.
Fig. 5 shows the figure of setting forth the performance change of fuel battery when the fuel cell system long-play of Fig. 1 and Fig. 3 according to the temperature difference diagram of cooling water.
* the explanation * that represents the Reference numeral of the primary element in the accompanying drawing
100,200: fuel cell system 110,210: fuel battery
120,220: fuel 130,230: the oxygen feed unit
140,240: electric pressure converter 150,250: cooling unit
160,161,260,261: controller
Embodiment
Describe the present invention below with reference to the accompanying drawings more all sidedly, the preferred embodiment of the invention has been shown in the accompanying drawing.Those skilled in the art should recognize that described embodiment can carry out the modification of different modes, and all modifications do not break away from the spirit and scope of the present invention.
Fig. 1 is the schematic diagram according to the fuel cell system of first preferred embodiment of the invention.
As shown in Figure 1, the fuel cell system 100 of this preferred embodiment comprises the fuel battery 110 that electrochemical reaction wherein takes place, the reformation electricity generation material also offers hydrogen the fuel 120 of fuel battery 110, by oxygen being offered the oxygen feed unit 130 of fuel battery 110 and the electric pressure converter 140 that the direct current that fuel battery 110 produces is converted to alternating current with compressor or air blast cooperation.
Especially, for the electrode layer of removing fuel battery 110 and the moisture in the material feed path, the fuel cell system 100 of the preferred embodiment of the present invention is designed to following structure.
This fuel cell system 100 also comprises the cooling unit 150 that utilizes cooling water to absorb the heat that produces in the fuel battery 100, and the heat recovery unit 151 of retrieving the used heat in the cooling water of self-cooling mono unit 150.
Temperature difference Δ T between first and second controllers 160 and 161 control cooling water inlets and the outlet, thus this temperature difference Δ T is along with the time becomes impulse waveform.In order to realize this point, the operation of first controller, 160 controls, first pump 153, the operation of second controller, 161 controls, second pump 154.Subsequently, first and second controllers 160 and 161 controls flow into the flow velocity of the cooling water of fuel battery.Although first and second controllers 160 and 161 are separated to install in this embodiment, the invention is not restricted to this situation.For example, can only provide a controller to control all element.In addition, first and second controllers 160 and 161 can be designed to share or exchange from the data of a plurality of transducers or the transmission of a plurality of element.
The cooling control method of fuel cell system 100 is described below with reference to Fig. 2.
Fig. 2 is the flow chart of cooling control method of the fuel cell system of diagram Fig. 1.
Cooling control method with reference to figure 1 and Fig. 2 description fuel cell system according to a preferred embodiment of the invention.
In first preferred embodiment, when beginning to produce electrical power, voltage detector 180 is measured supply voltage continuously, and first controller 160 determine reduced rate Δ V that the voltage that records changes according to the time according to the input data whether within a predetermined scope.According to the result that first controller 160 is determined, second controller 161 moves the flow velocity of second pump 154 of cooling units 150 with the adjusting cooling water, thereby keeps the internal temperature of fuel battery 110 equably.
Next, under the even state that keeps of the internal temperature of fuel battery 110, whether the supply voltage of determining this fuel battery 110 is more than or equal to predetermined value.
When supply voltage during more than or equal to this predetermined value, the current flow velocity of cooling water is normally kept.When supply voltage during less than this predetermined value, first controller, 160 operations, first pump 153 to be adjusting the flow velocity of cooling water, thereby changed the cooling degree of fuel battery 110.That is, carried out the control procedure of the temperature difference of cooling water.For example, in the control procedure of temperature difference, the process of carrying out the flow velocity that increases cooling water makes the inlet temperature of cooling water and the difference DELTA T between the outlet temperature remain within 3-4 ℃ of this narrow relatively scope.In addition, in the control procedure of temperature difference, the process of also carrying out the flow velocity that reduces cooling water makes the inlet temperature of cooling water and the temperature difference Δ T between the outlet temperature remain within the scope of 8-10 ℃ of this relative broad.The process that increases and reduce the flow velocity of cooling water was alternately carried out by the predetermined cycle (2-5 time).Then, the figure of the inlet temperature of cooling water and the difference DELTA T between the outlet temperature becomes impulse waveform.
Yet, when the reduced rate Δ V that changes the supply voltage that records continuously along with the time is within predetermined scope, perhaps when having passed through several hrs (for example 8 hours) after the cooling control of carrying out the front, can carry out the above-mentioned cooling control method of fuel cell system 100.
Fuel cell system according to a second embodiment of the present invention will be described below.
Fig. 3 is the schematic diagram according to the fuel cell system of second preferred embodiment of the invention.
The fuel cell system 200 of this preferred embodiment is substantially similar to the fuel cell system 100 of Fig. 1.Therefore, omit the description of same composition element and only describe different element here.
In second preferred embodiment, omitted the air-cooled heat exchanger of describing among Fig. 1 156.On the contrary, in fuel cell system 200, heat? recovery pipe 257 is connected between cooling water inlet pipe and the outlet, makes the cooling water that flows along cooling water outlet pipe directly enter the cooling water inlet pipe under not by the situation of heat recovery units 251.In addition, first switch valve 258 is installed in the cooling water inlet pipe upward optionally to allow cooling water to flow from heat recovery unit 251.Second switch valve 259 is installed on the heat? recovery pipe 257 optionally to allow cooling-water flow.Then, when the control cooling water did not pass through heat recovery units 251, first switch valve 258 cut out and second switch valve 259 is opened.On the other hand, when the control cooling water so that the used heat of cooling water is when being recovered, first switch valve 258 opens simultaneously second switch valve 259 and cuts out.Be that the fuel cell system 200 of the preferred embodiment is constructed such that as required the used heat that reclaims cooling water by opening/closing first and second switch valves 258 and 259 optionally.
The cooling control method of fuel cell system 200 is described below with reference to Fig. 3 and Fig. 4.
Fig. 4 is the flow chart of cooling control method of the fuel cell system of diagram Fig. 3.
Preferably fuel battery 210 remains on its internal temperature within one scope of being scheduled to when operation.Yet, when fuel battery 210 operation distances, because the variation of the variation of humidity or other external environment condition is difficult to keep its inner water balance.Therefore, produce condensed water in the Catalytic Layer of fuel battery 210 and gas diffusion layers, this will cause the water blockage phenomenon, thereby reduce the supply voltage of fuel cell system.
In order to address this problem, the cooling control method of the fuel cell system of second preferred embodiment will be carried out according to following step.
In second preferred embodiment, when beginning to produce electrical power, voltage detector 280 is measured supply voltage continuously, and first controller 260 is determined along with the time changes the reduced rate Δ V of measured voltage whether within a preset range.
Next, determine that the cooling water inlet temperature of fuel battery 210 and the difference DELTA T between the outlet temperature are whether within 3-4 ℃ predetermined temperature range.When this difference DELTA T is not within predetermined temperature range, then measure the temperature of cooling water inlet and the temperature of the cooling water introduced from heat recovery units 251.When the temperature of coolant outlet during more than or equal to predetermined value, second controller, 261 control first and second switch valves 258 and 259 make cooling water can pass through heat recovery unit 251, thereby have reduced the temperature of fuel battery 210.After above-mentioned, when temperature gap Δ T reached this predetermined value, second controller, 261 control first and second switch valves 258 and 259 made cooling water enter into heat? recovery pipe 257.By said process, the internal temperature of fuel battery 210 can remain on a predetermined value.
As mentioned above, in this fuel cell system 200, can detect since the reduced rate Δ V that the water blockage phenomenon causes supply voltage along with the variation of time within predetermined scope.Then, in second preferred embodiment, second controller, 261 second pumps 254 out of service to be increasing the internal temperature of fuel battery 210, thereby remove the moisture of condensation in Catalytic Layer and the gas diffusion layers.Next, when the outlet temperature of cooling water remained on this predetermined value, second controller 261 moved second pump 254 once more, made temperature difference T can remain within 8-10 ℃ the scope.
In addition, determine that whether the supply voltage of the fuel battery 210 that voltage detector 280 detects is more than or equal to predetermined value.
When supply voltage during more than or equal to this predetermined value, the current flow velocity of cooling water is normally kept.When supply voltage during less than this predetermined value, first controller, 260 operations, first pump 153 to be regulating the flow velocity of cooling water, thereby changes the cooling degree of fuel battery 210.That is, carry out the temperature difference control procedure of cooling water.For example, in this temperature difference control procedure, the process of carrying out the flow velocity that improves cooling water is so that the difference DELTA T between the inlet temperature of cooling water and the outlet temperature remains within the scope of 3-4 ℃ of this relative narrower.In addition, in the control procedure of this temperature difference, also carry out the flow velocity that reduces cooling water, so that the difference DELTA T between the inlet temperature of cooling water and the outlet temperature remains within the scope of 8-10 ℃ of this relative broad.Alternately carry out the process (2-5 time) that increases and reduce the flow velocity of cooling water at a predetermined period.Then, the figure of the inlet temperature of cooling water and the difference DELTA T between the outlet temperature becomes impulse waveform.
When the fuel cell system long-play of Fig. 1 and Fig. 3, Fig. 5 shows the figure of diagram along with the performance change of the variations in temperature fuel battery of cooling water.
The figure of Fig. 5 shows when the fuel cell system long-play, the relation between the outlet temperature j of the voltage k of fuel battery, the inlet temperature 1 of cooling water and cooling water.As shown in FIG., when the entrance and exit temperature of cooling water increased, the voltage of fuel battery was tending towards increasing.This point is appreciated that according to following equation 1.
[equation 1]
I)
II)
Wherein, G is the free energy of Gibb, and R is a mol gas constant, and P is a local pressure, and n is the number of electrons of each molecule, and F is an avogadros constant, and T is a temperature, and E is the electromotive force that voltage meter records.
Shown in the figure of Fig. 5, can notice that the voltage of fuel battery keeps increase to be increased to a c up to the inlet temperature and the outlet temperature of cooling water.This point is appreciated that from equation 1 wherein voltage is directly proportional with temperature.In addition, the reaction speed of reaction material depends on temperature, and reaction material reacts on the surface of electrode effectively thus, thereby has increased the voltage of fuel battery.In addition, if also normally carry out heat exchange after the temperature of cooling water is increased to a c, then the temperature of cooling water reduces sharp.Then, the voltage of fuel battery reaches maximum when within the temperature range that the inlet temperature and the difference between the outlet temperature of cooling water is in 8-10 ℃.Because the moisture in the fine pore of Catalytic Layer and the feed path is owing to the increase of saturation vapor pressure is removed, the voltage increase that therefore can realize fuel battery changes within this temperature range up to the temperature difference, thereby can obtain the reflecting point of the metallic catalyst of negative electrode and anode.Therefore, because vapour pressure reduces once more in the part that temperature reduces, thereby has realized the gas supply effectively, so the voltage of fuel battery can increase.
Although described the present invention together with being considered to actual preferred embodiment at present, but be appreciated that and the invention is not restricted to disclosed embodiment, but, on the contrary, the present invention is intended to cover different modifications and the setting of equal value within the spirit and scope that are included in appended claim.
Claims (14)
1, a kind of fuel cell system comprises:
The fuel battery of electrochemical reaction takes place;
Hydrogen is offered the fuel of fuel battery by the reformation electricity generation material;
The oxygen that oxygen is offered fuel battery provides the unit;
Utilize cooling water to absorb the cooling unit of heat from fuel battery;
From cooling water, reclaim the heat recovery unit of used heat;
Voltage detector along with the supply voltage of time change-detection fuel battery; And
Controller, it is used for the response time when change changing the inlet temperature of cooling water and the difference between the outlet temperature, and the temperature that the voltage that detects according to voltage detector will flow into the cooling water of fuel battery remains within the preset range.
2, according to the fuel cell system of claim 1, the inlet tube of cooling water that wherein cooling water is directed to fuel battery from heat recovery unit is between fuel battery and heat recovery unit;
Cooling water is directed to the outlet of the cooling water the heat recovery unit between fuel battery and heat recovery unit from fuel battery; And
Measuring the inlet temperature of corresponding cooling water and the temperature sensor of outlet temperature is installed in respectively on the inlet tube and outlet of cooling water.
3, according to the fuel cell system of claim 2, wherein the used heat with cooling water is diffused into outside air-cooled heat exchanger between the inlet tube and outlet of cooling water.
4, according to the fuel cell system of claim 2, wherein the heat? recovery pipe is connected between the inlet tube and outlet of cooling water, makes cooling water outlet from cooling water under not by the situation of heat recovery unit be directed to the inlet tube of cooling water.
5, according to the fuel cell system of claim 4, wherein first switch valve is installed on the inlet tube of cooling water optionally to allow cooling water to discharge from heat recovery unit, and the second switch valve is installed on the heat? recovery pipe optionally to allow flow of cooling water.
6, a kind of method that is used for the fuel battery of cooled fuel cell systems, it comprises:
According to the voltage of time measure of the change from the fuel battery generation;
According to this voltage that records the internal temperature of fuel battery is remained on predetermined value; And
The temperature difference of control cooling water wherein normally provides cooling water during more than or equal to predetermined value when the voltage that records, and when the voltage that records during less than this predetermined value, by the inlet temperature of the cooling water of controller change fuel battery and the difference between the outlet temperature.
7,, wherein keep internal temperature to comprise according to the method for claim 6:
Determine that reduced rate that the voltage that records changes along with the time is whether within predetermined scope; And
According to definite result of this reduced rate flow velocity by regulating cooling water the internal temperature of fuel battery is remained on predetermined value.
8, according to the method for claim 7, wherein carry out the temperature difference control of cooling water by replacing the process of carrying out the process that improves flow velocity and reducing flow velocity, thereby the difference between the entrance and exit temperature of raising flow velocity permission cooling water reaches first scope, allows reaching second scope through the difference between the entrance and exit temperature of cooling water after the scheduled time thereby reduce flow velocity.
9, method according to Claim 8, wherein first scope is that 3-4 ℃ and second scope are 8-10 ℃.
10, method according to Claim 8, wherein the inlet temperature of cooling water and the difference between the outlet temperature are controlled as along with the time variation is impulse waveform.
11,, wherein keep internal temperature to comprise according to the method for claim 6:
The reduced rate of determining the voltage that records is along with whether the time changes within predetermined scope; And
Enter into heat exchanger by the outlet cooling water that allows fuel battery, the outlet cooling water that does not perhaps allow fuel battery enters into heat exchanger but directly cooling water is directed to fuel battery according to the result that reduced rate is determined by changing the recuperation of heat path, and the internal temperature of fuel battery is remained on predetermined value.
12, according to the method for claim 11, wherein carry out the temperature difference control of cooling water by replacing the process of carrying out the process that improves flow velocity and reducing flow velocity, thereby the difference between the entrance and exit temperature of raising flow velocity permission cooling water reaches first scope, allows reaching second scope through the difference between the entrance and exit temperature of cooling water after the scheduled time thereby reduce flow velocity.
13, according to the method for claim 12, wherein first scope is that 3-4 ℃ and second scope are 8-10 ℃.
14, according to the method for claim 12, wherein the inlet temperature of cooling water and the difference between the outlet temperature are controlled as along with the time variation is impulse waveform.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2006-0073058 | 2006-08-02 | ||
| KR1020060073058A KR100725253B1 (en) | 2006-08-02 | 2006-08-02 | Fuel cell system and cooling control method thereof |
| KR1020060073058 | 2006-08-02 | ||
| PCT/KR2007/002515 WO2008016216A1 (en) | 2006-08-02 | 2007-05-23 | Fuel cell system and cooling control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101356674A true CN101356674A (en) | 2009-01-28 |
| CN101356674B CN101356674B (en) | 2011-09-28 |
Family
ID=38358414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800011377A Active CN101356674B (en) | 2006-08-02 | 2007-05-23 | Fuel cell system and cooling control method thereof |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100725253B1 (en) |
| CN (1) | CN101356674B (en) |
| WO (1) | WO2008016216A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107305955A (en) * | 2016-04-18 | 2017-10-31 | 现代自动车株式会社 | Apparatus and method for controlling fuel cell pack |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100787243B1 (en) | 2006-11-28 | 2007-12-21 | (주)퓨얼셀 파워 | Fuel cell system and operating method |
| KR100911591B1 (en) * | 2007-12-14 | 2009-08-10 | 현대자동차주식회사 | Heat and air control method of fuel-cell system at high power load |
| KR100892160B1 (en) | 2008-07-14 | 2009-04-10 | 주식회사 씨에이치피테크 | Perprmance testing apparatus for residential fuel cell cogeneration system |
| US20130078543A1 (en) * | 2010-06-07 | 2013-03-28 | Honda Motor Co., Ltd. | Operation method for fuel cell, and fuel cell system |
| KR101281883B1 (en) * | 2011-12-27 | 2013-07-03 | 포스코에너지 주식회사 | Integrated control systems for fuel cell |
| KR101420087B1 (en) | 2012-10-08 | 2014-07-21 | 한국에너지기술연구원 | Combined Heat and Power Co-generation System for Fuel Cell |
| KR101488472B1 (en) * | 2013-08-23 | 2015-02-03 | 주식회사 경동나비엔 | Drain device control system of waste heat using mixing valve and the mehtod thereof |
| KR101581569B1 (en) * | 2014-07-09 | 2015-12-31 | 현대제철 주식회사 | Fuel cell system having geometric progression divided resistance type controller |
| CN105371521B (en) * | 2014-08-27 | 2018-05-08 | 上海合既得动氢机器有限公司 | A kind of power generation and the system and method for refrigerating integrated |
| CN105444455A (en) * | 2014-08-27 | 2016-03-30 | 上海合既得动氢机器有限公司 | System and method for integrating electricity generation and refrigeration of automobile |
| CN113394428B (en) * | 2020-03-11 | 2022-05-10 | 宇通客车股份有限公司 | Fuel cell waste heat management system and control method thereof |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2621424B2 (en) * | 1988-10-04 | 1997-06-18 | 富士電機株式会社 | Operation control device for fuel cell |
| US5360679A (en) * | 1993-08-20 | 1994-11-01 | Ballard Power Systems Inc. | Hydrocarbon fueled solid polymer fuel cell electric power generation system |
| JPH07320760A (en) * | 1994-05-27 | 1995-12-08 | Toshiba Corp | Fuel cell power generation plant |
| US6186254B1 (en) * | 1996-05-29 | 2001-02-13 | Xcelliss Fuel Cell Engines Inc. | Temperature regulating system for a fuel cell powered vehicle |
| US6033793A (en) * | 1996-11-01 | 2000-03-07 | Hydrogen Burner Technology, Inc. | Integrated power module |
| US6627339B2 (en) * | 2000-04-19 | 2003-09-30 | Delphi Technologies, Inc. | Fuel cell stack integrated with a waste energy recovery system |
| JP4884604B2 (en) | 2001-07-04 | 2012-02-29 | 本田技研工業株式会社 | Fuel cell cooling system |
| JP2003267065A (en) | 2002-03-12 | 2003-09-25 | Nissan Motor Co Ltd | Control device for vehicular cooling system |
| US6942942B2 (en) * | 2002-06-24 | 2005-09-13 | Delphi Technologies, Inc. | Solid-oxide fuel cell assembly having a thermal enclosure within a structural enclosure |
| CN1632978A (en) * | 2004-12-29 | 2005-06-29 | 武汉理工大学 | Vehicular fuel battery engine control method and apparatus |
-
2006
- 2006-08-02 KR KR1020060073058A patent/KR100725253B1/en active IP Right Grant
-
2007
- 2007-05-23 WO PCT/KR2007/002515 patent/WO2008016216A1/en active Application Filing
- 2007-05-23 CN CN2007800011377A patent/CN101356674B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107305955A (en) * | 2016-04-18 | 2017-10-31 | 现代自动车株式会社 | Apparatus and method for controlling fuel cell pack |
| CN107305955B (en) * | 2016-04-18 | 2021-02-05 | 现代自动车株式会社 | Apparatus and method for controlling fuel cell stack |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100725253B1 (en) | 2007-06-04 |
| WO2008016216A1 (en) | 2008-02-07 |
| CN101356674B (en) | 2011-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101356674B (en) | Fuel cell system and cooling control method thereof | |
| CN100481587C (en) | Hydrogen passivation shut down system for a fuel cell power plant | |
| CN101341617B (en) | Power supply system and control method thereof | |
| EP2517293B1 (en) | Management of operation of a pem fuel cell stack back-up electric generator | |
| CN100411234C (en) | Fuel cell system | |
| EP2221907B1 (en) | Back-up fuel cell electric generator comprising a compact manifold body | |
| US7579097B2 (en) | Fuel cell voltage feedback control system | |
| WO2006112897A2 (en) | Method to begin coolant circulation to prevent mea overheating during cold start | |
| CN101682066B (en) | Fuel cell system | |
| CN101366142A (en) | Fuel cell stack with stoichiometry determination in individual cells | |
| JP2012528448A (en) | Open fuel cell system | |
| EP3179547B1 (en) | Hydrogen generation system | |
| US6587766B2 (en) | Method for controlling the power of a fuel cell stack, method for controlling the power of a drive unit of an electric vehicle, and fuel cell device | |
| KR101759141B1 (en) | Device and method for controlling hydrogen concentration of fuel cell system | |
| CN101682065B (en) | Fuel cell system and method of operating the same | |
| KR20180068450A (en) | Method and apparatus for estimating hydrogen crossover loss of fuel cell system | |
| EP1442493A2 (en) | Fuel cell system and its startup control | |
| CN110212221B (en) | Fuel cell and humidity control method thereof | |
| CN114583221A (en) | Method for measuring and calculating attenuation life of galvanic pile | |
| CN102792507A (en) | Fuel cell system and method for controlling electric current of same | |
| CN107507995B (en) | Asymmetric humidification control system for fuel cell and working method | |
| CN100361337C (en) | Fuel cell capable of rapid response under output power abrupt intensification state | |
| EP3389125A1 (en) | Fuel cell system | |
| US20240186548A1 (en) | Method for operating a fuel cell system and control device for same | |
| KR101394732B1 (en) | Controlled thermal management system in fuel cell application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DOOSAN CORP. Free format text: FORMER OWNER: FUELCELL POWER INC. Effective date: 20150225 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150225 Address after: Seoul, South Kerean Patentee after: Doosan Corporation Address before: Gyeonggi Do, South Korea Patentee before: Fuelcell Power Inc. |