CN104577161B - Method for restoring performance for fuel cell unit - Google Patents
Method for restoring performance for fuel cell unit Download PDFInfo
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- CN104577161B CN104577161B CN201310757137.7A CN201310757137A CN104577161B CN 104577161 B CN104577161 B CN 104577161B CN 201310757137 A CN201310757137 A CN 201310757137A CN 104577161 B CN104577161 B CN 104577161B
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- fuel cell
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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
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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
- H01M8/04223—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids during start-up or shut-down; Depolarisation or activation, e.g. purging; Means for short-circuiting defective fuel cells
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- Y02E60/10—Energy storage using batteries
-
- 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
A kind of method of fuel cell unit performance for restoring to be installed in the vehicle is provided.Method includes being applied continuously in predetermined load using load device so that the recovering step that electric current is exported from fuel cell unit when stopping air supply and supplying hydrogen to fuel cell unit.Further, the proton and electronics generated in anode by hydroxide reaction is moved to cathode, to generate hydrogen in cathode and at the same time removing the oxide on cathod catalyst surface.
Description
Technical field
The present invention relates to the methods of the performance for restoring fuel cell unit.More particularly, the present invention relate to direct
Restore method of the performance of the deterioration for the fuel cell unit being installed in the vehicle without dismantling fuel cell unit.
Background technique
Fuel cell unit is used in fuel-cell vehicle as main power source, and by tens of unit electricity to hundreds of stackings
Pond is constituted.Fig. 2 schematically shows the exemplary basic configuration of membrane electrode assembly in the element cell of fuel cell unit (MEA).
As shown in the drawing, membrane electrode assembly is arranged in the most inner side of the element cell of fuel cell unit.
Membrane electrode assembly includes the polymer dielectric film 10 of proton conducting, and as electrode stack in dielectric film two
Side is so that the anode 14 and cathode 12 that the hydrogen as fuel gas is reacted with the oxygen as oxidizing gas.Anode 14 and cathode 12 by
The catalysis material platinum (Pt) being supported on carbon, i.e. Pt/C catalyst electrode layer are made.
Although being not shown in Fig. 1, gas diffusion layers (GDL), gasket etc. are stacked on the outside of cathode 12 and anode 14, and
And partition is stacked on outside gas diffusion layers.Partition provides the runner of supply reaction gas, that is, hydrogen and oxygen (or oxygen-containing air), and
The water for generating reaction is discharged and passes through cooling water.In addition, the external engagement in battery supports and fixes outermost element cell
End plate, connector etc., to complete fuel cell unit.
At the anode of fuel cell unit, as described in following reaction equation, the oxidation of hydrogen occurs, to export proton and electricity
Son.Proton and electronics generated pass through polymer dielectric film respectively and partition shifts to cathode.It is mobile from anode at cathode
Proton and electronics and air in include oxygen react and form water.As electronics is mobile, produced from fuel cell unit
Raw electric energy.
Electrode reaction-
Anode: hydroxide 2H2→4H++4e-
Cathode: hydrogen reduction 4H++4e-+O2→2H2O
It is overall: 2H2+O2→2H2O
In fuel cell unit work, in the polymer dielectric film and catalysis electrode (Pt/ of membrane electrode assembly (MEA)
C it) is deteriorated at cathode and anode.As a result, the performance (i.e. battery pack output) of fuel cell unit reduces at any time.Especially
Ground, when forming oxidation film (such as Pt-OH, Pt-O etc.) on the surface of platinum (Pt) cathode due to for example deteriorating, oxidation
Object film interferes the reaction oxygen (O on platinum surface2) absorption, thus slow down the oxygen reduction reaction (ORR) at cathode, and lead to electricity
Pond group reduced performance.
In addition, the Pt cation (Pt discharged from the oxide on platinum surface during operationz+) may be redeposited in it
On the surface of its platinum grain, the size of platinum grain is caused to increase.In addition, the carbon corrosion occurred during operation cause platinum and carbon it
Between relatively weak binding, so as to cause nano-scale platinum grain coalesce.The increase of platinum particle size causes catalytic activity to reduce.So
And the decline of battery performance caused by the chemical change on platinum catalyst surface is considered as irreversible deterioration, and
Almost without the research or report for restoring (such as reparation) method about membrane electrode assembly property.
According to the method for related application, the step of hydrogen is supplied to the cathode of the fuel cell unit of deterioration, is repeated at least 3 times,
And hydrogen is also stored the predetermined time, to remove the oxide formed on cathode platinum surface.Specifically, by being repeated 3 times hydrogen
It supplies 1 hour and the step of by storing hydrogen one, can go in the cathode 12 (referring to Fig. 1) of about 70 DEG C of fuel cells to deterioration
Except the oxidation film (Pt-OH, Pt-O etc.) formed on surface platinum (Pt) of cathode 12, meanwhile, it is discharged during operation of fuel cells
Platinum ion (the mobile Pt of movement outz+, z=2 or 4) can by with electronics in conjunction with and it is redeposited for high activity
Platinum (Pt).As a result, the available recovery of the catalytic activity of cathode, and battery performance is thus made to restore about 30~40%.
It, can be two as being diffused into anode 14 (as shown in dotted arrow in Fig. 1) to the hydrogen of the supply 1 hour of cathode 12
Hydrogen atmosphere is generated at a electrode, and can restore the catalyst oxide at cathode.However, this method needs the fuel increased
Battery performance recovery time, and may be to the hydrogen of cathode excess.For these reasons, it may be difficult to not from fuel electricity
Pond vehicle restores the performance of fuel cell unit in the case where dismantling.
Summary of the invention
The present invention is provided to the deterioration fuel cell unit performances for restoring to be installed in the vehicle without dismantling electricity from vehicle
The method of pond group.Specifically, the present invention is provided to the catalytic activity for the deterioration fuel cell unit for restoring to be installed in the vehicle and
Structure of the battery performance without dismantling battery pack or the auxiliary facility without changing fuel cell system (BOP) from vehicle
Method.
It on the one hand, may include when stopping air supplying the present invention is provided to restore the method for fuel cell unit performance
When Ying Bingxiang fuel cell unit supplies hydrogen, predetermined load is continuously applied using load device, to export electric current from fuel cell unit,
Wherein in anode, proton and electronics as caused by hydroxide reaction are movable to cathode, to generate hydrogen in cathode, and same
When can remove cathod catalyst surface on oxide.
It in the exemplary embodiment, can be when stopping air supply and supplying hydrogen to fuel cell unit, to fuel cell
Group continuously applies predetermined load, to exhaust the air in cathode, and can continuously perform load restoration operation.In another example
In property embodiment, recovery operation can be executed to the scheduled time, and recovery operation can be repeated.It is exemplary at another
In embodiment, when repeating recovery operation, it can be gradually increased by the electric current that load device consumes.Further, restoring
During operation, load can be applied about 1 hour to fuel cell unit, continuously be disappeared so that the electric current of about 3~30A is supported device
Consumption.Dry hydrogen can be supplied to fuel cell unit, and the hydrogen for passing through humidifier humidifying can be supplied to fuel cell unit.
Other feature and aspect of the invention is more obvious according to following specific embodiments, drawings and claims.
Detailed description of the invention
The certain illustrative embodiments of the invention illustrated with reference to the drawings are of the invention upper to describe in detail
It states and other objects, features and advantages, these embodiments described below merely exemplifies, therefore be not to this hair
Bright limitation, in which:
Fig. 1 is according to the existing for restoring the exemplary diagram of the method for the performance of fuel cell unit of the relevant technologies；
Fig. 2 is the exemplary film electrode assembly according to the fuel cell of the relevant technologies；
Fig. 3 shows that the exemplary hydrogen pump of cathode in the performance recovery operation of illustrative embodiments according to the present invention is sent
(pumping) mechanism；
Exemplary electrical cell voltage during Fig. 4 shows the performance recovery operation of illustrative embodiments according to the present invention divides
Cloth；
Fig. 5 shows the exemplary catalyst Restoration Mechanism of illustrative embodiments according to the present invention；
Fig. 6 shows the exemplary battery group performance recovery of illustrative embodiments according to the present invention；
Fig. 7 shows the exemplary effect of restoring current during the performance recovery operation of illustrative embodiments according to the present invention
Fruit；
Fig. 8 shows after the performance recovery operation of illustrative embodiments according to the present invention showing for performance difference between battery
Example property reduces；
Fig. 9 shows that pass through " hydrogen overflows (hydrogen spillover) " of illustrative embodiments according to the present invention makes to urge
The exemplary scheme of oxycarbide reduction around agent；And
Figure 10 shows the intersexuality of the battery due to caused by improved water discharge of illustrative embodiments according to the present invention
The exemplary reduction of energy difference.
The detailed description of main element
10: polymer dielectric film
12: cathode
14: anode
It is to be understood that appended attached drawing is not necessarily in proportion, which illustrate the various of general principles
The representative simplified to a certain extent of example feature.The specific design feature of present invention disclosed herein, including, for example, tool
Body size, direction, location and shape will partly depend on specific given application and use environment.
Specific embodiment
It should be understood that terms used herein " vehicle " or " vehicle " or other similar terms include common motor vehicle,
E.g., including sport utility vehicle (SUV), bus, truck, various commercial vehicles car, including various sailer and ships
Water carrier, aircraft etc., and including hybrid electric vehicle, electric vehicle, burning, plug-in hybrid electric vehicles, hydrogen power
Vehicle, fuel-cell vehicle and other substitute fuel cars (for example, fuel of the resource other than petroleum).
Terms used herein are merely to illustrate that the purpose of specific embodiment without being intended to the limitation present invention.Such as
Used herein, singular " one, a kind of (a, an) " and " being somebody's turn to do (the) " are also intended to including plural form, unless up and down
It is clearly indicated in text.It will also be appreciated that term used in the description " including (comprises and/or
Comprising) " refer to that there are the feature, integer, step, operations, elements, and/or components, but do not exclude the presence of or add
Add one or more of the other feature, integer, step, operation, component, assembly unit and/or its group.As it is used herein, term
"and/or" includes any and all combinations of one or more related listed items.
It obviously obtains unless stated otherwise or from context, otherwise the term as used herein " about " is interpreted as in this field
In normal allowable range, such as in 2 standard deviations of mean value." about " can be understood as the numerical value 10%, 9%,
8%, in 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05% or 0.01%.Unless in addition from context
Clear from all numerical value provided herein are all modified by term " about ".
Below by detail referring to each illustrative embodiments of the invention, embodiment is illustrated in appended accompanying drawing,
And it is described below.Although will be of the invention in conjunction with illustrative embodiments description, it is to be understood that, this specification has no intention
Limit the invention to these illustrative embodiments.On the contrary, the present invention will not only cover these illustrative embodiments, also want
Cover various alternative forms in the spirit and scope of the present invention being defined by the appended claims, modification, equivalents and
Other embodiment.
The present invention is provided to the performances of the fuel cell unit for the deterioration for restoring to be installed in the vehicle without tearing open from vehicle
The method unloaded.Specifically, it when stopping air supply and the hydrogen that humidifying is saturated being supplied to fuel cell unit, scheduled can will bear
Load is successively applied to fuel cell unit, so that hydrogen pump is caused to send and (generate hydrogen in cathode internal) at cathode, and from there through
It is effectively removed the oxidation film (Pt-OH, Pt-O etc.) formed on cathode platinum catalyst surface and restores catalytic activity and battery
Group performance.
It specifically, can be by scheduled load continuously firstly, when stopping air supply and supplying hydrogen to fuel cell unit
Be applied to fuel cell unit, with remove the oxidation film formed on cathode platinum catalyst surface (platinum oxide, for example, Pt-OH,
Pt-O etc.).In other words, when stopping supply air and the hydrogen of humidifying saturation being supplied to the anode of fuel cell unit, can make
Scheduled load is continuously applied in fuel cell unit with load device.
Be used to the humidifier for the hydrogen humidifying for being supplied to fuel cell unit from the storing hydrogen tank of vehicle can the hydrogen of humidifying
Supplied to fuel cell unit.Although supply can be dry hydrogen to restore the hydrogen of battery performance when stopping supplying air,
Higher efficiency is provided compared to dry hydrogen using humidified hydrogen.Therefore, the hydrogen of humidifying can be supplied from humidifier to battery pack, and
It is not dry hydrogen.
Due to known various types of for making the humidifier of gas (such as reaction gas) humidifying in fuel cell field
Including film humidifier, therefore omit its detailed description.Humidifier may be provided at hydrogen supply line or runner to make hydrogen humidifying.This
Outside, load device can be any device that electric current can be consumed from fuel cell unit being installed in the vehicle.It is, for example, possible to use
Cathode oxygen depletion (COD) device of installation in the fuel cell system.Therefore, to be formed on removal cathode platinum catalyst surface
Oxide, by air supply and humidifying saturation hydrogen be supplied to anode when, it is extensive that electric current is withdrawn from by using load device
Scheduled load can be successively applied to fuel cell unit by multiple catalytic activity and battery performance.
When stopping supply air and supply saturation hydrogen, when load is applied to fuel cell unit using load device,
Internal air can be consumed, and the cell voltage of fuel cell unit can be decreased to 0V (anode: 2H2→4H++4e-/ cathode: 4H++
4e-+O2→2H2O, the oxygen in cathode can be consumed).And works as and fuel gas hydrogen and oxidizing gas air (oxygen) are supplied to fuel
When battery pack, cell voltage is open-circuit voltage (OCV；Theoretically about 1.23V), and when stopping is saturated hydrogen and Xiang Yin to anode supply
When pole supplies air and load is applied to fuel cell unit using load device, the cell voltage of fuel cell unit may reduce
To 0V.When being continuously applied predetermined load after residual oxygen in the cathode is depleted, in the matter that anode is generated by hydroxide reaction
Son and electronics, which are moved to cathode and hydrogen occur in cathode, generates reaction (anode: 2H2→4H++4e-/ cathode: 4H++4e-→2H2,
Cathode generates hydrogen).
In addition, load device (such as COD device) can continuously consume predetermined time (example to about 30A or lower electric current
Such as recovery time).For example, load can be applied to about 1 hour recovery time to fuel cell unit, so that the electric current of about 3~30A
It is supported device continuous consumption.When applying the electric current to restore too low (such as insufficient), it may be difficult to realize sufficient battery
Group performance recovery effect and recovery efficiency.Due to restoring efficiency as electric current increases, the enough electricity for being up to about 30A can be applied
Stream.
As described above, when supplying humidified hydrogen during the recovery operation in battery performance, restore that efficiency is available mentions
It is high.In addition, making chilled(cooling) water supply (CWS) to the cooling-water duct of battery pack by operating pile cooling during recovery operation
When, it can further improve performance recovery efficiency.In other words, when the hydrogen (such as 70 DEG C) and low temperature by supplying high temperature simultaneously
When cooling water (such as 15~30 DEG C) makes cooling-water duct flowing of the cooling water along partition, since water is in the electrode surface of battery pack
It is condensed on (such as reaction surface), restoring efficiency can be further improved.
Fig. 3 shows the exemplary hydrogen pumping machine in the performance recovery operation of illustrative embodiments according to the present invention at cathode
System.Fig. 3 shows the proton and electronics generated at anode by hydroxide reaction and shifts to cathode, and can generate hydrogen in cathode.
In addition, being moved to the proton of cathode and electronics can also directly participate in being formed by oxide (example at cathode on platinum catalyst surface
Such as Pt-O, Pt-OH) reduction.Oxide is formed by platinum catalyst surface at cathode as a result, can remove.
Fig. 4 show the performance recovery operation of illustrative embodiments according to the present invention during each battery of fuel cell unit
Average voltage exemplary distribution.Show the cell voltage point when the restoring current of about 5A is applied to load device
Cloth.Fig. 4 show during performance recovery operation will load be applied to battery pack when, cell voltage can be decreased to 0V.According to
The reduction reaction of the platinum oxide occurred at cathode during performance recovery operation of the invention is as follows.
Pt-O+H++e-→Pt-OHads
Pt-OHads+H++e-→Pt+H2O
In addition, the electrode reaction during performance recovery operation according to the present invention, i.e., hydroxide reaction and yin at anode
Hydrogen reduction (such as generation) reaction at pole is as follows.
Electrode reaction-
Anode: hydroxide reaction 2H2→4H++4e-
Cathode: oxygen reduction reaction 4H++4e-→2H2(hydrogen pump is sent)
It is overall: H2(anode) → H2(cathode)
Fig. 5 describes the catalyst Restoration Mechanism of illustrative embodiments according to the present invention.Stopping to being installed in the vehicle
Deterioration battery pack supply air and only supply hydrogen when, by continuously applying the constant current of about 3~6A, can be generated at cathode
Hydrogen (H2Pumping), and can remove be formed in during operation of fuel cells on cathode platinum catalyst surface oxide (Pt-O,
Pt-OH) to improve catalytic activity.
Enough recoveries are obtained to make to deteriorate battery performance, performance recovery operation can be repeated (for example, stopping empty
Gas supply, supply hydrogen and application load).When the electric current i.e. restoring current consumed when repeating recovery operation by load device
When being gradually increased, the oxide reduction reaction rate on cathode platinum surface can increase, therefore deterioration battery pack can be improved
The recovery efficiency of performance.For example, restoring current can increase as follows when repeating recovery operation: 3.5A → 4.5A →
5.5A。
Fig. 6 and Fig. 7 shows the exemplary battery group performance recovery of illustrative embodiments according to the present invention.Recovery operation weight
It is 8 times multiple, and battery pack current and voltage after the 1st, the 2nd, the 4th and the 8th operation is shown in FIG. 6.With reference to Fig. 6, in weight
When multiple performance recovery operation, the cell voltage (such as average voltage of each battery) under identical current density is gradually increased.
After the 8th recovery operation, cell voltage is in 0.6A/cm2Current density under increase about 33mV, thus compared to primality
The performance recovery that can cause 43% shows the performance that can restore membrane electrode assembly by improving catalytic activity.
The exemplary effect of restoring current during Fig. 7 shows performance recovery operation according to an illustrative embodiment of the invention
Fruit.It shows based on restoring current in about 0.6A/cm2Current density under average battery voltage.Referring to experiment shown in Fig. 7
As a result, as battery pack restoring current is gradually increased to 5.5A while Repeatability recovery operation from 3.5A to 4.5A again
When, the efficiency of performance recovery gradually increases.
In the present invention, by the way that load is applied to battery pack with strong by battery pack when stopping air supply and supply hydrogen
System generates electricity, is forced to use in such as Pt-O of the oxide in cathode included oxygen, rather than the oxygen for including in air.Pass through
It is sent in the hydrogen pump of the cathode of deterioration battery pack, the oxidation film being present on the platinum catalyst surface of cathode can be effectively removed
(such as Pt-OH, Pt-O), and particularly, battery performance can be restored without dismantling battery pack from fuel-cell vehicle.This
Outside, the durability of battery pack can be improved.
As another advantageous effects as provided by method of the invention, experiments prove that, performance recovery operation it
Afterwards, the biggish battery of degradation shows that biggish voltage increases, and the lesser battery of degradation shows lesser electricity
Pressure increases.Therefore, when the combustion for being applied to be made of hundreds of battery units by the method for illustrative embodiments according to the present invention
When expecting battery pack, the performance difference (battery performance balance) between the battery as caused by vehicle traction can be reduced.
Fig. 8 shows after the performance recovery operation of illustrative embodiments according to the present invention subtracting for performance difference between battery
It is small.After the 8th performance recovery operation, the standard deviation reduction about 19% of cell voltage, and del V, that is, all batteries are put down
Difference between equal voltage and minimum cell voltage, reduces about 55%.Therefore, when applying the method for the present invention, degradation
The performance recovery of biggish battery obtains relatively more, as a result, all batteries can show substantially uniform performance.
As another advantageous effects as provided by method of the invention, water can be improved after performance recovery operation from combustion
Expect the discharge of battery.On the surface that the hydrogen generated at cathode during performance recovery operation can be adsorbed on platinum catalyst, then may be used
It is moved to the carbon carrier (" hydrogen spilling ") near platinum by diffusion into the surface, and be excited proton to restore oxycarbide near platinum,
Partly to restore the hydrophobicity of carbon surface.When restoration methods of the invention are applied to deterioration battery pack, water discharge can be with
Improve about 20%.As a result, the overflow (flooding) in the runner of metal partion (metp) can be reduced.In addition, being used for due to fully ensuring that
The runner of air and hydrogen, del V (such as difference between the average voltage and minimum cell voltage of all batteries) can be reduced
(performance difference between battery can be reduced).
Fig. 9 shows the oxycarbide of illustrative embodiments according to the present invention passed through around " hydrogen spilling " reducing catalyst
Exemplary scheme, and Figure 10 show del V with the working time exemplary reduction.As shown in figure 9, hydrogen can restore cathode carbon load
Oxycarbide on body to restore the hydrophobicity of carbon carrier, and prevents the deterioration of the battery performance as caused by overflow.Referring to figure
10, increase due to water from the discharge of battery pack after performance recovery operation, the performance difference between battery reduces (such as average
Del V reduces after performance recovery operation).
According to an illustrative embodiment of the invention, the catalysis of deterioration fuel cell unit being installed in the vehicle can be restored
Activity and battery performance, without dismantling battery pack, or the auxiliary facility (B without changing fuel cell system from vehicle
P structure), and the durability of battery pack can be improved.
As described above, it is according to the present invention for restoring the method for battery performance, stopping air supply and is supplying wet
When changing the hydrogen of saturation, battery pack is applied by using the load device being installed in the vehicle and is loaded, it can be more easily through restoring
It removes and is formed by oxide on the catalyst surface of cathode.Particularly, due to can restore deteriorate battery pack performance and nothing
Battery pack need to be dismantled from fuel-cell vehicle, therefore the overall durability of battery pack can be improved.
The present invention is described in detail with reference to its illustrative embodiments.However, those skilled in the art can manage
Solution can carry out variations and modifications to these embodiments without departing from the principles and spirit of the present invention, this
The range of invention is limited by appended claims and its equivalent.
Claims (7)
1. a kind of for restoring the method for the performance of fuel cell unit, comprising:
When stopping air supply and supplying hydrogen to fuel cell unit, predetermined load is applied continuously in using load device so that electricity
The recovery operation exported from the fuel cell unit is flowed,
Even if residual oxygen wherein in the cathode is still continuously applied the predetermined load using the load device after being depleted
Add to the fuel cell unit, thus residual oxygen in the cathode be depleted after load apply during in anode pass through hydroxide
It reacts the proton generated and electronics is moved to cathode, to generate hydrogen and at the same time removing the catalyst of the cathode in the cathode
Oxide on surface,
Wherein, it when repeating the recovery operation, is gradually increased by the electric current that the load device consumes.
2. it is according to claim 1 for restoring the method for the performance of fuel cell unit, wherein being supplied stopping the air
When fuel cell unit described in Ying Bingxiang supplies hydrogen, Xiang Suoshu fuel cell unit is applied continuously in predetermined load, to exhaust the yin
Extremely internal air, and continuously perform load restoration operation.
3. it is according to claim 1 for restoring the method for the performance of fuel cell unit, wherein the recovery operation is held
The row predetermined time, and repeat the recovery operation.
4. according to claim 1 for restoring the method for the performance of fuel cell unit, wherein in the recovery operation phase
Between will load to the fuel cell unit apply 1 hour so that the electric current of 3~30A is by the load device continuous consumption.
5. according to claim 1 for restoring the method for the performance of fuel cell unit, wherein by humidifier humidifying
Hydrogen is supplied to the fuel cell unit.
6. according to claim 5 for restoring the method for the performance of fuel cell unit, wherein the cooling water when supplying hydrogen
Cooling-water duct along the battery pack flows, so that water condenses on the electrode surface of the battery pack.
7. it is according to claim 1 for restoring the method for the performance of fuel cell unit, wherein dry hydrogen is supplied to institute
State fuel cell unit.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20130121827 | 2013-10-14 | ||
| KR10-2013-0121827 | 2013-10-14 | ||
| KR10-2013-0146740 | 2013-11-29 | ||
| KR1020130146740A KR101575415B1 (en) | 2013-10-14 | 2013-11-29 | Performance recovery method for fuel cell stack |
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| CN104577161A CN104577161A (en) | 2015-04-29 |
| CN104577161B true CN104577161B (en) | 2019-08-13 |
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| CN201310757137.7A Active CN104577161B (en) | 2013-10-14 | 2013-12-30 | Method for restoring performance for fuel cell unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101684114B1 (en) * | 2015-05-15 | 2016-12-07 | 현대자동차주식회사 | Method for activation of fuel cell |
| KR101637833B1 (en) | 2015-05-18 | 2016-07-07 | 현대자동차주식회사 | Recovery method of performance of the fuel cell stack and its apparatus for recovery |
| KR101795222B1 (en) | 2016-03-16 | 2017-11-07 | 현대자동차주식회사 | Method for accelerating activation of fuel cell |
| KR101886515B1 (en) | 2016-10-18 | 2018-08-07 | 현대자동차주식회사 | Fuel cell system and method for controlling the same |
| KR20200138475A (en) | 2019-05-29 | 2020-12-10 | 현대자동차주식회사 | Restore control system and method of fuel cell |
| CN112421082A (en) * | 2020-11-19 | 2021-02-26 | 武汉格罗夫氢能汽车有限公司 | Method for rapidly recovering performance of vehicle fuel cell system |
| CN114447380B (en) * | 2022-01-18 | 2024-04-26 | 同济大学 | Method for recovering performance of proton exchange membrane fuel cell stack |
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| CN101582513A (en) * | 2008-05-15 | 2009-11-18 | 现代自动车株式会社 | Method for accelerating activation of fuel cell |
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