CN110931834A - Adjustable fuel cell packaging structure - Google Patents
Adjustable fuel cell packaging structure Download PDFInfo
- Publication number
- CN110931834A CN110931834A CN201911312775.1A CN201911312775A CN110931834A CN 110931834 A CN110931834 A CN 110931834A CN 201911312775 A CN201911312775 A CN 201911312775A CN 110931834 A CN110931834 A CN 110931834A
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- CN
- China
- Prior art keywords
- end plate
- pull rod
- positioning
- gas port
- fuel cell
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Classifications
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
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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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0273—Sealing or supporting means around electrodes, matrices or membranes with sealing or supporting means in the form of a frame
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention provides an adjustable fuel cell packaging structure, which comprises a positioning insulating pull rod and a pull belt; the positioning insulating pull rod is used for fastening a pile, one end of the positioning insulating pull rod is mounted on a blind end plate of the pile through an anti-rotation structure, and the other end of the positioning insulating pull rod is fixedly connected with a gas port end plate of the pile and the pull belt through screws; the gas port end plate surface sets up the end plate groove, the stretching strap is located the end plate inslot is used for compensating the gas port end plate is because the not enough deformation inequality that causes of rigidity, one is connected respectively at the stretching strap both ends the insulating pull rod of location. The technical scheme of the invention solves the problems of insufficient rigidity of the pull belt of the high-power electric pile, incapability of adjusting the packaging force and difficulty in assembly.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to an adjustable fuel cell packaging structure.
Background
The fuel cell is a clean energy power generation device which directly converts chemical energy into electric energy, and the energy conversion efficiency is higher than that of a common heat engine because the fuel cell is an electrochemical reaction, does not burn and release heat and is not limited by Carnot cycle. The high-power-efficiency energy-saving power generation system has the advantages of high energy conversion efficiency, simple structure, low emission, low noise, high reliability and the like, is commonly used for power systems of vehicles, ships, spaceflight and other delivery vehicles, can be used for the fields of mobile or fixed power station power generation and the like, and has very wide market prospect.
The bipolar plate and the membrane electrode are important components in the fuel cell stack, the bipolar plate is used for distributing fuel, conducting electricity and supporting the membrane electrode, the membrane electrode is a place where electrochemical reaction occurs, and the bipolar plate and the membrane electrode are stacked and connected in series to form the fuel cell stack. In order to make the fuel cell have the contact resistance as small as possible, a certain acting force must be applied to compress the gas diffusion layer, and the temperature difference of the fuel cell stack in the operation process, especially in the starting and stopping processes, is large, so that thermal expansion and cold contraction of each component in the fuel cell stack can be caused, the thermal expansion and cold contraction of the material can finally change the pressing force of the stack, and a screw, a fastening belt or other fastening materials used for fastening also change along with the temperature change, so that the deformation of each component in the stack frequently changes, the gas diffusion layer can be deformed, the gas permeability can be reduced, even the gas diffusion layer is damaged, and meanwhile, the proton exchange membrane with the catalyst layer can be influenced by the microporous layer to change the yield force, even be damaged, and the output performance and the service life of the stack can be seriously influenced. Normally, a metal screw is used for fastening the pile, and elastic materials such as spring washers, disc springs and springs are used on the screw to prevent the height of the pile from changing, but the friction force between the nut and the screw is large, and the fastening force of the screws reaching a specific pile height may cause inconsistent normal stress of the end plate and even warping due to inconsistent torque.
The invention discloses a packaging structure of a fuel cell stack (with the publication number of CN107611466A, published as 20180119), which discloses a packaging structure of a fuel cell stack, wherein two ends of an insulating fixed rod are respectively connected with a nut of an upper end plate and a nut of a lower end plate, and the inner surface of the nut is provided with an internal thread matched with external threads at two ends of the insulating fixed rod; the limitations of this structure are: the insulating fixed rod has no core positioning function, cannot compensate the pressure distribution of the air hole end plate, and cannot meet the slight change of the height in the aged metal plate fuel cell stack, so that the pressing force is insufficient; although the method can ensure the normal working condition of the cell stack, the assembly is complex, a complex positioning tool is required, and a large positioning groove is formed in the end plate.
Patent fuel cell stack fastening device (publication No. CN108346814A, publication No. 20180731) discloses a fastening structure for a fuel cell stack and a fuel cell stack, which better solves the problems of volume and weight, and also effectively solves the problems of gas port end plates, but the invention has the limitations that:
1. the reverse arc part needs to have stronger elastic deformation capacity to deal with material strain and deformation caused by expansion with heat and contraction with cold, the material is very difficult to select the type, and in order to deal with pressure change caused by expansion with heat and contraction with cold, the two ends of the reverse arc part can frequently deform in the horizontal and vertical directions, so that the fastening belt is rubbed, and the third fastening belt further compresses the first fastening belt downwards from the middle, so that the stress of the first fastening belt on the arc part is increased, the reliability of the fastening belt is not facilitated, and the fuel cell stack is particularly not suitable for application of a fuel cell stack on an automobile;
2. insulation between the bipolar plate membrane electrode group and the fastening belt is not considered, so that only the non-metal fastening belt can be used, generally, the thermal expansion coefficient of the non-metal fastening belt is several times of that of stainless steel, the design and processing requirements on the arc part and the fastening belt are extremely high, and the fuel cell stack can be loosened due to slight deviation;
3. the acting points of the positive arc part and the reverse arc part on the stack are mainly concentrated at the central position of the end plate, when the thickness of the end plate material is insufficient, buckling deformation can be caused at the edge position of the end plate in the normal direction, or the consistency of the stack pressing force is reduced under the condition that the thermal deformation of the fastening belt is too large, even the air tightness problem is caused, so that the positive arc part and the reverse arc part are not suitable for assembling a high-power fuel cell stack with larger membrane electrode width or larger height in the stack.
Disclosure of Invention
According to the technical problems that the high-power stack pull belt is insufficient in rigidity, the packaging force cannot be adjusted and the assembly is difficult, the adjustable fuel cell packaging structure is provided. The invention aims to provide the packaging structure which is convenient to mount and dismount, is stable and reliable in connection and can adjust the packaging force of the stack again, and the packaging force can be further compensated for the aged stack on the premise of not increasing the manufacturing difficulty of a fuel cell end plate and a positioning tool.
The technical means adopted by the invention are as follows:
an adjustable fuel cell packaging structure comprises a positioning insulating pull rod and a pull belt;
the positioning insulating pull rod is used for fastening a pile, one end of the positioning insulating pull rod is mounted on a blind end plate of the pile through an anti-rotation structure, and the other end of the positioning insulating pull rod is fixedly connected with a gas port end plate of the pile and the pull belt through screws;
the gas port end plate surface sets up the end plate groove, the stretching strap is located the end plate inslot is used for compensating the gas port end plate is because the not enough deformation inequality that causes of rigidity, one is connected respectively at the stretching strap both ends the insulating pull rod of location.
Further, the positioning insulating pull rod comprises a metal pull rod and a metal pull rod insulating sleeve; and the positioning insulating pull rod is attached to the reactor core of the electric pile.
Furthermore, the positioning insulating pull rod is partially embedded in the air port end plate, a gap is formed in the direction in which the positioning insulating pull rod is embedded in the air port end plate, and the height of the gap is smaller than the thickness of the air port end plate.
Furthermore, the device also comprises an auxiliary positioning insulating pull rod, wherein one end of the auxiliary positioning insulating pull rod is installed on the dead end plate of the pile through an anti-rotation structure, and the other end of the auxiliary positioning insulating pull rod is fixedly installed on the gas port end plate of the pile through a screw.
Compared with the prior art, the invention has the following advantages:
the adjustable fuel cell packaging structure provided by the invention realizes reliable press mounting of the stack, and the stack tool positions and fastens the stack through the positioning insulating rod on the stack without slotting on the end plate for the positioning tool; the rigidity and the strength of the end plate are improved, the manufacturing difficulty of the tool is reduced through the design of the electric pile tool, a part of structure of the electric pile can be a part of the tool, the size deviation of the reactor core assembly is reduced, and the assembling difficulty is reduced; but also can be quickly unstacked during assembly and maintenance.
In conclusion, the technical scheme of the invention is convenient to mount and dismount, is stably and reliably connected, can adjust the packaging force of the stack again, and can further compensate the packaging force of the aged stack on the premise of not increasing the manufacturing difficulty of a fuel cell end plate and a positioning tool. Therefore, the technical scheme of the invention solves the problems of insufficient rigidity of the pull belt of the high-power electric pile, incapability of adjusting the packaging force and difficulty in assembly.
For the above reasons, the present invention can be widely applied to the fields of fuel cells and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a package structure according to embodiment 1 of the present invention.
Fig. 2 is a schematic view of a connection structure of the positioning insulating pull rod and the pull tape in embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of the assembly of the positioning insulating tie rod and the reactor core according to embodiment 1 of the invention.
Fig. 4 is a schematic diagram of a gap structure according to embodiment 1 of the present invention.
Fig. 5 is a schematic cross-sectional view of a package structure according to embodiment 1 of the invention.
In the figure: 1. a gas port end plate; 11. an end plate slot; 2. pulling the belt; 3. a screw; 4. positioning an insulating pull rod; 41. a metal tie rod; 42. a metal pull rod insulating sleeve; 5. a core; 6. auxiliary positioning of the insulating pull rod; 7. a blind end plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in fig. 1-5, the present invention provides an adjustable fuel cell packaging structure, comprising a positioning insulating tie rod 4 and a draw tape 2; the positioning insulating pull rod 4 is used for fastening a galvanic pile, one end of the positioning insulating pull rod 4 is installed on a blind end plate 7 of the galvanic pile through an anti-rotation structure, and the other end of the positioning insulating pull rod 4 is fixedly connected with a gas port end plate 1 and the pull belt 2 of the galvanic pile through screws 3; the surface of the gas port end plate 1 is provided with an end plate groove 11, the pull belt 2 is positioned in the end plate groove 11 and used for compensating the uneven deformation of the gas port end plate 1 caused by insufficient rigidity, namely the gas port end plate 1 is prevented from deforming, and two ends of the pull belt 2 are respectively connected with one positioning insulating pull rod 4; the end plate grooves 11 can restrain the positions of the pull belts 2 and the positioning insulating pull rods 4, and can better fasten the pile.
Further, the positioning insulating pull rod 4 comprises a metal pull rod 41 and a metal pull rod insulating sleeve 42; the positioning insulating pull rod 4 is attached to the reactor core 5 of the electric reactor and used for restraining the movement of the reactor core 5 so as to fasten the electric reactor;
preferably, the metal pull rod 41 can be formed by welding a profile and a standard piece; the metal pull rod insulating pipe sleeve 42 can be obtained by cutting a standard material in the market, so that the automatic production of the galvanic pile is convenient to realize, and the manufacturing difficulty of the galvanic pile is reduced.
Further, the positioning insulating tie rod 5 is partially embedded in the gas port end plate 1, and a gap h is formed in the direction in which the positioning insulating tie rod 4 is embedded in the gas port end plate 1, the height of the gap h is smaller than the thickness of the gas port end plate 1, and the gap h plays a role in core compensation.
Further, the anti-rotation structure is a bolt.
Furthermore, the device also comprises an auxiliary positioning insulating pull rod 6, wherein one end of the auxiliary positioning insulating pull rod 6 is installed on a dead end plate 7 of the electric pile through an anti-rotation structure, and the other end of the auxiliary positioning insulating pull rod 6 is fixedly installed on the air port end plate 1 through a screw 3 and is used for assisting the positioning insulating pull rod 4 to further fasten the electric pile; the auxiliary positioning insulating pull rod 6 comprises a metal pull rod and a metal pull rod insulating sleeve, and is attached to the reactor core 5.
In this embodiment, the insulating pull rod 4 of location sets up in pairs in the side of reactor core 5, every pair the insulating pull rod 4 of location sets up relatively in the both sides of reactor core 5 and every pair the insulating pull rod 4 of location corresponds one the stretching strap 2 the reactor core 5 does not set up the side of the insulating pull rod 4 of location sets up the insulating pull rod 6 of auxiliary location, through the insulating pull rod 4 of location with the insulating pull rod 6 of auxiliary location cooperatees, can restrict the activity of reactor core 5, and then better realization is right the fastening of galvanic pile.
The adjustable fuel cell packaging structure provided by the embodiment can further adjust the packaging force, and simplify the tool clamp and the assembly difficulty; the pressure is uniformly and constantly provided for the inside of the aged cell stack, so that the lower surface of the cell stack body is uniformly stressed, the normal working condition of the cell stack is ensured, and the service life of the cell stack is prolonged.
The invention solves the problem of insufficient rigidity of the connection between the air hole end plate and the blind end plate, and the connection is more efficient and convenient; the problem that the electric pile needs to be fixed in a groove of an end plate in a complicated manner and the problem that the electric pile is complex to package and assemble are solved, the electric pile is scattered into a whole, and the difficulty in assembly caused by the size deviation of a reactor core is avoided; can realize the further compensation of the attenuation of the packaging force of the aged galvanic pile and reduce the influence of the size shrinkage of the galvanic pile on the packaging force of the galvanic pile
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. An adjustable fuel cell packaging structure is characterized by comprising a positioning insulating pull rod and a pull belt;
the positioning insulating pull rod is used for fastening a pile, one end of the positioning insulating pull rod is mounted on a blind end plate of the pile through an anti-rotation structure, and the other end of the positioning insulating pull rod is fixedly connected with a gas port end plate of the pile and the pull belt through screws;
the gas port end plate surface sets up the end plate groove, the stretching strap is located the end plate inslot is used for compensating the gas port end plate is because the not enough deformation inequality that causes of rigidity, one is connected respectively at the stretching strap both ends the insulating pull rod of location.
2. The tunable fuel cell package of claim 1, wherein the positioning insulator tie comprises a metal tie and a metal tie insulator sleeve; and the positioning insulating pull rod is attached to the reactor core of the electric pile.
3. The tunable fuel cell package of claim 1, wherein the positioning insulator tie is partially fitted into the gas port end plate and has a gap in a direction in which the positioning insulator tie is fitted into the gas port end plate, the gap having a height less than a thickness of the gas port end plate.
4. The adjustable fuel cell package assembly of claim 1, further comprising an auxiliary positioning insulating tie rod, wherein one end of the auxiliary positioning insulating tie rod is mounted to the blind end plate of the stack by an anti-rotation structure, and the other end of the auxiliary positioning insulating tie rod is fixedly mounted to the gas port end plate of the stack by a screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312775.1A CN110931834A (en) | 2019-12-18 | 2019-12-18 | Adjustable fuel cell packaging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911312775.1A CN110931834A (en) | 2019-12-18 | 2019-12-18 | Adjustable fuel cell packaging structure |
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| Publication Number | Publication Date |
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| CN110931834A true CN110931834A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911312775.1A Pending CN110931834A (en) | 2019-12-18 | 2019-12-18 | Adjustable fuel cell packaging structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397757A (en) * | 2020-11-13 | 2021-02-23 | 上海捷氢科技有限公司 | Fuel cell stack packaging structure, packaging box body thereof and cell structure |
| CN112687935A (en) * | 2020-12-26 | 2021-04-20 | 上海捷氢科技有限公司 | Electric pile packaging box |
| CN113013464A (en) * | 2021-03-04 | 2021-06-22 | 上海捷氢科技有限公司 | Fuel cell stack and packaging box body of fuel cell stack |
| CN113224345A (en) * | 2021-05-07 | 2021-08-06 | 北京理工大学 | Adjustable fuel cell end plate packaging structure |
| CN113675427A (en) * | 2021-07-09 | 2021-11-19 | 新源动力股份有限公司 | Fuel cell sealing structure and assembling method thereof |
| CN113745623A (en) * | 2021-07-30 | 2021-12-03 | 东风汽车集团股份有限公司 | Fuel cell stack, fuel cell and vehicle |
| CN115632154A (en) * | 2022-12-23 | 2023-01-20 | 天津中科先进技术产业有限公司 | Fuel cell stack and fuel cell stack fixing method |
| CN115663255A (en) * | 2022-12-26 | 2023-01-31 | 天津中科先进技术产业有限公司 | High-strength lightweight stack end plate and fuel cell stack |
-
2019
- 2019-12-18 CN CN201911312775.1A patent/CN110931834A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397757A (en) * | 2020-11-13 | 2021-02-23 | 上海捷氢科技有限公司 | Fuel cell stack packaging structure, packaging box body thereof and cell structure |
| CN112687935A (en) * | 2020-12-26 | 2021-04-20 | 上海捷氢科技有限公司 | Electric pile packaging box |
| CN112687935B (en) * | 2020-12-26 | 2022-05-17 | 上海捷氢科技股份有限公司 | Electric pile packaging box |
| CN113013464A (en) * | 2021-03-04 | 2021-06-22 | 上海捷氢科技有限公司 | Fuel cell stack and packaging box body of fuel cell stack |
| CN113224345A (en) * | 2021-05-07 | 2021-08-06 | 北京理工大学 | Adjustable fuel cell end plate packaging structure |
| CN113675427A (en) * | 2021-07-09 | 2021-11-19 | 新源动力股份有限公司 | Fuel cell sealing structure and assembling method thereof |
| CN113745623A (en) * | 2021-07-30 | 2021-12-03 | 东风汽车集团股份有限公司 | Fuel cell stack, fuel cell and vehicle |
| CN115632154A (en) * | 2022-12-23 | 2023-01-20 | 天津中科先进技术产业有限公司 | Fuel cell stack and fuel cell stack fixing method |
| CN115663255A (en) * | 2022-12-26 | 2023-01-31 | 天津中科先进技术产业有限公司 | High-strength lightweight stack end plate and fuel cell stack |
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