CN201741756U - Fuel cell comprising pluralities of independent battery sub-units - Google Patents
Fuel cell comprising pluralities of independent battery sub-units Download PDFInfo
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- CN201741756U CN201741756U CN2010201656937U CN201020165693U CN201741756U CN 201741756 U CN201741756 U CN 201741756U CN 2010201656937 U CN2010201656937 U CN 2010201656937U CN 201020165693 U CN201020165693 U CN 201020165693U CN 201741756 U CN201741756 U CN 201741756U
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- fuel cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a fuel cell comprising pluralities of independent battery sub-units, comprising a plurality of fuel cell units, wherein each fuel cell unit comprises a bipolar plate and a membrane electrode component; the membrane electrode component comprises a proton exchange membrane and catalyst layers arranged at two sides of the proton exchange membrane; two sides of the proton exchange membrane are provided with mutually independent catalyst layers symmetrically; the proton exchange membrane, the catalyst layer, the air-breathing layer and the bipolar plate at the position of the same catalyst layer form a fuel cell sub-unit; the fuel cell sub-units at the same positions of a plurality of fuel cell units are connected in series to form fuel cell sub-unit groups; and all fuel cell sub-unit groups are connected in series with a diode and are connected with one another in parallel. In the utility model, the whole fuel cell is divided into a plurality of independent fuel cell sub-unit groups, the association among the reaction regions is eliminated, the amplitude of the voltage difference which possibly occurs is segmented and reduced, and the occurrence of the electro-chemical corrosion phenomenon is reduced.
Description
Technical field
The utility model belongs to the fuel cell technology field, particularly the fuel cell of independent reaction areas.
Background technology
Fuel cell is made of a plurality of battery units usually, and each battery unit comprises two electrodes (bipolar plates), and these two electrodes are separated by electrolyte element, and assembling with being one another in series, forms fuel cell pack.By supplying with suitable reactant for each electrode, promptly give an electrode fueling and another supply oxidant, the realization electrochemical reaction, thus between electrode, form potential difference, and therefore produce electric energy.
For improving the needs that satisfy more high-power output, adopt the mode of conversion zone (catalyst layer) area in the membrane electrode assembly (MEA) that increases each battery unit to realize usually.As shown in Figure 1, the two sides of proton exchange mould 1 among Fig. 1 (front of a side only is shown among Fig. 1) is equipped with catalyst layer 2, reactant enters the runner of bipolar plates from passage 4, the release reaction thing on the catalyst layer 2 of membrane electrode assembly (MEA) electrochemical reaction takes place in the runner.
Compare with technology before, though the runner of bipolar plates design has at present had suitable progress, but along with the increase of conversion zone area in the membrane electrode assembly (MEA), in electrochemical reaction process, the runner on the bipolar plates can not guarantee also that it can carry reactant equably.In the membrane electrode assembly as shown in Figure 1 (MEA), at the runner zone that entire cell is set, from the import to the outlet, in other words, in different regional areas, distribution of air flow is uneven.In these overall or local zones, the concentration of fuel and oxidant also is uneven in addition, in working order down, the electric transient effect that fluctuation produced of the supply of reactant, the relation of its voltage V and same flow channel length L longitudinally is as shown in Figure 2.In the same runner that length L is, may produce bigger voltage difference delta V at the runner two ends; In like manner, phenomenon in this big voltage difference of transversely also may producing of membrane electrode assembly (MEA) conversion zone, and between runner, also may there be the phenomenon that produces voltage difference because of the inhomogeneous release of reactant, cause bigger horizontal (Inplane) electric current of the inner generation of each battery unit, cause the electrochemical corrosion of membrane electrode, this will greatly reduce the useful life of fuel cell.And the zone that the reactant quantity delivered is big is subject to the little zone of reactant quantity delivered, and this associated effect also can cause the big regional output voltage of reactant quantity delivered to be dragged down, and influences the power output of fuel cell.
The utility model content
The purpose of this utility model is to provide a kind of fuel cell that comprises a plurality of independent cell subunit groups, easily produces the technical problem that transverse current causes the corrosion of fuel cell with each battery unit that solves existing fuel cell.
For achieving the above object, the utility model adopts following technical scheme:
A kind of fuel cell that comprises a plurality of independent cell subunit groups, comprise a plurality of cell of fuel cell, each described cell of fuel cell comprises bipolar plates and the membrane electrode assembly between described bipolar plates, described membrane electrode assembly comprises the proton exchange mould and is positioned at the catalyst layer of these proton exchange mould both sides that described proton exchange mould both sides all are arranged with separate catalyst layer;
Position corresponding to each described catalyst layer is provided with an air-permeable layer;
Described bipolar plates comprises non-electrochemical conversion zone and a plurality of electrochemical reactions zone, described electrochemical reaction zone is corresponding with the position of described catalyst layer, splicing is connected with the non-electrochemical conversion zone in described electrochemical reaction zone, and the material of described non-electrochemical conversion zone is a non-conducting material;
The position of the catalyst layer of each described cell of fuel cell is identical, proton exchange mould, catalyst layer, air-permeable layer and the bipolar plates of same catalyst layer position becomes a fuel cell subelement, the fuel cell subelement at a plurality of described cell of fuel cell same positions place is connected in series and constitutes fuel cell subelement group, and is in parallel after each described fuel cell subelement group is connected with a diode.With existing make as far as possible reactant the design concept of the uniform single fuel cell pack of entire reaction region allocation different be, the utility model adopts overall fuel cell is divided into a plurality of individual fuel cell subelement groups, eliminated the relevance between the conversion zone, the amplitude of the voltage difference of cutting apart and having reduced to occur, reduced the generation of electrochemical corrosion phenomenon, brought into play usefulness to greatest extent from an individual fuel cell subelement and even whole fuel cell.
Further, the both sides lateral symmetry of described proton exchange mould is provided with the catalyst layer of a plurality of mutual separations.
Further, the both sides of described proton exchange mould vertically are arranged with the catalyst layer of a plurality of mutual separations.
Further, gap between the described catalyst layer in the same described cell of fuel cell and the gap location between the air-permeable layer filler that is provided with insulation.
Further, described filler and described non-electrochemical conversion zone are structure as a whole.
The utility model is designed to a plurality of distinct area with the catalyst layer in the membrane electrode assembly of fuel cell, and further with correspondingly separately design of air-permeable layer, two plates or the like, can avoid on catalyst layer, air-permeable layer and bipolar plates, producing respectively bigger transverse current so effectively, delay the corrosion phenomenon of fuel cell greatly, improved the life-span of fuel cell.And by the diode that increases, effectively avoided generation because of voltage difference deleterious current between fuel cell subelement group, further improved the life-span of fuel cell, brought into play usefulness to greatest extent from an individual fuel cell subelement and even whole fuel cell.
Further specify the utility model below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the structural representation of the membrane electrode assembly of existing fuel cell;
Fig. 2 is the voltage V graph of a relation of membrane electrode assembly on same flow channel length L of existing fuel cell;
Fig. 3 is the structural representation of the membrane electrode assembly among the fuel cell embodiment of the utility model comprises a plurality of independent cell subunit groups;
Fig. 4 is the structural representation that the utility model comprises the bipolar plates among the fuel cell embodiment of a plurality of independent cell subunit groups;
Fig. 5 among the fuel cell embodiment of the utility model comprises a plurality of independent cell subunit groups at the cutaway view at Fig. 3 membrane electrode assembly A-A place;
Fig. 6 is the voltage V graph of a relation of membrane electrode assembly on same flow channel length L among the fuel cell embodiment of the utility model comprises a plurality of independent cell subunit groups;
The fuel cell example structure schematic diagram of Fig. 7 a plurality of independent cell subunit groups for the utility model comprises.
Embodiment
As shown in Figure 5, a kind of fuel cell that comprises a plurality of independent cell subunit groups, comprise a plurality of cell of fuel cell, described cell of fuel cell comprises bipolar plates 10 and the membrane electrode assembly 20 between described bipolar plates 10, described membrane electrode assembly 20 comprises proton exchange mould 22 and is positioned at the catalyst layer 21 of these proton exchange mould both sides, wherein, the catalyst layer 21 of described proton exchange mould 22 both sides is a plurality of separate catalyst layers 21.Being that catalyst layer 21 is separated from each other design, is that one whole design is distinguished mutually with existing catalyst layer 2, avoids producing on catalyst layer 21 bigger transverse current.
Wherein, the catalyst layer 21 of described proton exchange mould 22 both sides is symmetrical arranged.
Wherein, the position corresponding to each described catalyst layer 21 is provided with an air-permeable layer 24.It is this separately mode of design that air-permeable layer 24 also adopts catalyst layer 21.Can avoid on air-permeable layer 24 producing bigger transverse current equally like this.
Wherein, described bipolar plates 10 comprises non-electrochemical conversion zone 12 and a plurality of electrochemical reactions zone 11, described electrochemical reaction zone 11 is corresponding with the position of described catalyst layer 21, and 12 splicings are connected with the non-electrochemical conversion zone in described electrochemical reaction zone 11.Wherein, the material of described non-electrochemical conversion zone 12 is a non-conducting material.
Wherein, as shown in Figure 5, the position of the catalyst layer 21 of each described cell of fuel cell is identical, the proton exchange mould 22 of same catalyst layer 21 positions, catalyst layer 21, air-permeable layer 24 and bipolar plates 10 constitute a fuel cell subelement, the fuel cell subelement at a plurality of described cell of fuel cell same positions place is connected in series and constitutes fuel cell subelement group, in parallel after each described fuel cell subelement group is connected with a diode, as shown in Figure 7.Each fuel cell subelement is separate in the same cell of fuel cell, can not produce transverse current between each subelement, and can not produce electric current between each fuel cell subelement group unit, therefore the useful life that can improve fuel cell effectively because of the difference of voltage yet.
Like this,, and produce transient effect on same described cell of fuel cell, also can not produce bigger voltage difference even the reactant flow that provides owing to runner is inhomogeneous.As shown in Figure 6, in the same longitudinally runner of membrane electrode assembly 20,, and produce transient effect, its voltage V and the relation of same flow channel length L longitudinally because that reactant flow distributes is inhomogeneous.In the same runner that length L is, by catalyst layer 21 is designed to a plurality of distinct area, under the constant situation of flow field condition, it may produce the part that voltage difference delta V has only existing membrane electrode assembly (concrete numerical value depends on the number of catalyst layer 21 on vertical same runner) at the runner two ends, this has reduced the amplitude of variation of voltage in the flow field or electric current greatly.In like manner, the voltage difference that transversely produces at conversion zone 21 also has only the part of existing MEA (concrete numerical value depends on the number of catalyst layer 21 on the horizontal same runner), this has also reduced the inner transverse current that produces of each cell of fuel cell greatly, and the slight lateral electric current that produces is limited in the single fuel cell subelement of branch, avoid the corrosion of whole fuel cell, greatly improved the useful life of fuel cell.Among Fig. 3, the passage 14 (shown in Figure 4) on channel interface 14 and the corresponding bipolar plates 10 is communicated with.
Wherein, the quantity of described catalyst layer 21 can the demand flexible design, and as from 2 to 200, its arrangement mode also can have multiple.Design is as far as possible evenly to distribute preferably, under the prerequisite that does not influence performance, improves the utilance of membrane electrode assembly as far as possible.As, be provided with the catalyst layer 21 of a plurality of mutual separations in the both sides of described proton exchange mould 22 lateral symmetry, and/or vertically be arranged with the catalyst layer 21 of a plurality of mutual separations in the both sides of described proton exchange mould 22.
Describe with four catalyst layers 21 in the present embodiment, should be understood that, this embodiment does not constitute restriction of the present utility model.
Fig. 5 is assembled into the cutaway view of fuel cell at membrane electrode assembly A-A place shown in Figure 3.Wherein, gap between the described catalyst layer 21 in the described same cell of fuel cell and the gap location between the air-permeable layer 24 filler 120 that is provided with insulation.This filler 120 is used to fill this part space and makes the insulation between interchange and the air-permeable layer 24 of insulating between the catalyst layer 21.This filler 120 also can be the part of the non-electrochemical conversion zone 12 of described bipolar plates 10, and promptly this filler 120 is structure as a whole with described non-electrochemical conversion zone 12.Can simplify the processing and the assembling of fuel cell like this.
Wherein, the electrochemical reaction zone 1 of described bipolar plates 10 is meant the zone that fueling and oxidant react, but not electrochemical reaction zone 12 is meant the zone that electrochemical reaction does not take place.This non-electrochemical conversion zone 12 is used to support described electrochemical reaction zone 11, bears extraneous active force.Electrochemical reaction zone 11 and separately design of non-electrochemical conversion zone 12 by with bipolar plates can effectively reduce design difficulty.For example, the bipolar plate material in described electrochemical reaction zone 11 can adopt the material that satisfies fuel battery double plates to make, as adopting carbon plate, metallic plate etc.And the material that the bipolar plate material of described non-electrochemical conversion zone 12 can adopt the cheapness with certain intensity and heat resistance to be easy to machine-shaping is made, and 1 splicing of electrochemical reaction zone is connected in this non-electrochemical conversion zone 12 and gets final product during assembling.
Wherein, the material of described non-electrochemical conversion zone 12 is an insulating material.For example ABS (by styrene-butadiene-acrylonitrile is the base terpolymers), PVC materials such as (pvc materials).This non-electrochemical conversion zone 12 can integrative-structure, also can be to be spliced by polylith.Conversion zone and its peripheral non-reaction zone territory are with a kind of electric conducting material in the bipolar plates of existing fuel cell, this part electric current that makes reaction produce passes through from its peripheral non-reaction zone territory, form eddy current, cause the gradient deviation of electric current, cause the generation of current loss phenomenon, this harmful current phenomenon causes the fuel cell pack reduction in useful life easily.The utility model is by electrochemical reaction zone 11 and separately design of non-electrochemical conversion zone 12 with bipolar plates, and adopt insulating material to make described non-electrochemical conversion zone 12, electric current is passed through from electrochemical reaction zone 12 equably, avoid the generation of eddy current, improved the useful life of fuel cell.And because described non-electrochemical conversion zone 12 is made for insulating material, this connected mode can further be avoided the generation of transverse current.
Wherein, described electrochemical reaction zone 11 is positioned at the middle part, and described non-electrochemical conversion zone 12 is positioned at described electrochemical reaction zone 11 peripheries.
Wherein, the reactant transfer passage 14 that the runner in described non-electrochemical conversion zone 12 electrochemical reaction that be provided with and described zones 12 communicates can adopt the multiple correlation technique of existing bipolar plates to realize, in the detailed description of this omission to this part.
Wherein, described electrochemical reaction zone 1 can adopt multiple mode to realize with the splicing of described non-electrochemical conversion zone 2, as splicing after bonding, hot pressing, the extruding, perhaps the part that will splice mutually is made as definite shape, as step, zigzag, groove, projection and realize by multiple modes such as annular seal bar sealing splicings.
Above-described embodiment only is used to illustrate technological thought of the present utility model and characteristics, its purpose is to make those skilled in the art can understand content of the present utility model and implements according to this, can not only limit claim of the present utility model with present embodiment, be all equal variation or modifications of doing according to the spirit that the utility model disclosed, still drop in the claim of the present utility model.
Claims (5)
1. fuel cell that comprises a plurality of independent cell subunit groups, comprise a plurality of cell of fuel cell, each described cell of fuel cell comprises bipolar plates and the membrane electrode assembly between described bipolar plates, described membrane electrode assembly comprises the proton exchange mould and is positioned at the catalyst layer of these proton exchange mould both sides, it is characterized in that:
Described proton exchange mould both sides all are arranged with separate catalyst layer;
Position corresponding to each described catalyst layer is provided with an air-permeable layer;
Described bipolar plates comprises non-electrochemical conversion zone and a plurality of electrochemical reactions zone, described electrochemical reaction zone is corresponding with the position of described catalyst layer, splicing is connected with the non-electrochemical conversion zone in described electrochemical reaction zone, and the material of described non-electrochemical conversion zone is a non-conducting material;
The position of the catalyst layer of each described cell of fuel cell is identical, proton exchange mould, catalyst layer, air-permeable layer and the bipolar plates of same catalyst layer position becomes a fuel cell subelement, the fuel cell subelement at a plurality of described cell of fuel cell same positions place is connected in series and constitutes fuel cell subelement group, and is in parallel after each described fuel cell subelement group is connected with a diode.
2. the fuel cell that comprises a plurality of independent cell subunit groups according to claim 1 is characterized in that:
The both sides lateral symmetry of described proton exchange mould is provided with the catalyst layer of a plurality of mutual separations.
3. the fuel cell that comprises a plurality of independent cell subunit groups according to claim 1 and 2 is characterized in that:
The both sides of described proton exchange mould vertically are arranged with the catalyst layer of a plurality of mutual separations.
4. the fuel cell that comprises a plurality of independent cell subunit groups according to claim 3 is characterized in that:
The filler that gap between the described catalyst layer in the same described cell of fuel cell and the gap location between the air-permeable layer are provided with insulation.
5. the fuel cell that comprises a plurality of independent cell subunit groups according to claim 4 is characterized in that:
Described filler and described non-electrochemical conversion zone are structure as a whole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201656937U CN201741756U (en) | 2010-03-30 | 2010-03-30 | Fuel cell comprising pluralities of independent battery sub-units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201656937U CN201741756U (en) | 2010-03-30 | 2010-03-30 | Fuel cell comprising pluralities of independent battery sub-units |
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| Publication Number | Publication Date |
|---|---|
| CN201741756U true CN201741756U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201656937U Expired - Lifetime CN201741756U (en) | 2010-03-30 | 2010-03-30 | Fuel cell comprising pluralities of independent battery sub-units |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011120425A1 (en) * | 2010-03-30 | 2011-10-06 | 上海恒劲动力科技有限公司 | Fuel cell with multiple independent reaction regions |
| WO2011120426A1 (en) * | 2010-03-30 | 2011-10-06 | 上海恒劲动力科技有限公司 | Bipolar plate for fuel cell |
-
2010
- 2010-03-30 CN CN2010201656937U patent/CN201741756U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011120425A1 (en) * | 2010-03-30 | 2011-10-06 | 上海恒劲动力科技有限公司 | Fuel cell with multiple independent reaction regions |
| WO2011120426A1 (en) * | 2010-03-30 | 2011-10-06 | 上海恒劲动力科技有限公司 | Bipolar plate for fuel cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI EVERPOWER POWER TECHNOLOGY (CANADA) CO., Free format text: FORMER OWNER: SHANGHAI EVERPOWER POWER TECHNOLOGY CO., LTD. Effective date: 20121023 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121023 Address after: Ben City, British Columbia, Canada Patentee after: Shanghai Heng Heng Power Technology (Canada) Co., Ltd. Address before: 201203 Shanghai Zhangjiang hi tech park, No. 1388 East Cheung Road, building 1 Patentee before: Shanghai Everpower Technologies Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20180709 Address after: Pudong New Area, Shanghai, China (Shanghai) free trade trial area, 1000 Jinsui Road, 2 Building 1, E area, 2 floor, E area Patentee after: Shanghai Everpower Technologies Ltd. Address before: Ben City, British Columbia, Canada Patentee before: Shanghai Heng Heng Power Technology (Canada) Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110209 |
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| CX01 | Expiry of patent term |