CN108346814B - Fastening device for fuel cell stack - Google Patents
Fastening device for fuel cell stack Download PDFInfo
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- CN108346814B CN108346814B CN201810197850.3A CN201810197850A CN108346814B CN 108346814 B CN108346814 B CN 108346814B CN 201810197850 A CN201810197850 A CN 201810197850A CN 108346814 B CN108346814 B CN 108346814B
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- arc
- fuel cell
- cell stack
- arc part
- positive
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- 239000000446 fuel Substances 0.000 title claims abstract description 62
- 239000013013 elastic material Substances 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 description 9
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- 239000002184 metal Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
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- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
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- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 229920000642 polymer Polymers 0.000 description 1
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- 229920006324 polyoxymethylene Polymers 0.000 description 1
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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
- H01M8/24—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
- H01M8/248—Means for compression of the 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
- H01M8/24—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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention provides a fastening device of a fuel cell stack, which comprises a front tail plate, a back tail plate, a first anti-arc part, a first positive arc part, a second anti-arc part, a second positive arc part, a first binding belt, a second binding belt and a third binding belt which are arranged at two ends of the stacking direction of the fuel cell stack, wherein the arc surface of the first anti-arc part is arranged on the side surface of the front tail plate back to the front tail plate, the arc surface of the first positive arc part is arranged on the side surface of the front tail plate back to the front tail plate, the second anti-arc part is arranged on the side surface of the back tail plate, the second positive arc part is arranged on the side surface of the back tail plate, the first binding belt is sleeved on two ends of the first anti-arc part and two ends of the second anti-arc part, the second binding belt is sleeved on the arc surface of the first positive arc part and the arc surface of the second positive arc part, the third binding belt is sleeved on the side surface of the first binding belt, the second binding belt and the side surface of the fuel cell stack, and the first anti-arc part, the second anti-arc part and the second positive arc part are respectively made of elastic materials. The fastening device has a simple and compact structure and ensures that the stress of the fuel cell stack is uniform.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a simple fastening device of a fuel cell stack.
Background
The fuel cell is a device for directly converting chemical energy into electric energy, and is very suitable for the fields of transportation, fixed power generation and portability due to high efficiency, zero emission and low starting temperature. In recent years, the application of fuel cells as a power source to the automotive field has been actively studied in various countries of the world. Because the voltage of the single-chip battery is small, the power requirement of an automobile cannot be met, a plurality of single-chip batteries are required to be assembled together in series to form a galvanic pile, and are fastened through mechanical pressure, if the fastening pressure is too large, stress concentration is easy to generate rupture or deformation of key parts such as a film electrode or a polar plate, even puncture and tear, and meanwhile, the porosity of a gas diffusion layer is reduced, a series of problems such as gas leakage, performance reduction, service life reduction and the like are caused, and if the fastening pressure is too small, contact resistance is easy to increase, so that the performance of the galvanic pile is reduced, and proper fastening pressure is critical to the performance, the safety method and the durability of the galvanic pile. In general, a complex fastening method is easy to bring more stress concentration problems and complicated assembly procedures, and has low reliability and low efficiency, so that the finding of a simple, compact and light-weight fastening method has important significance.
Currently, most galvanic pile fastening adopts a screw fastening mode. Among them, the screw fastening method has many inherent disadvantages. Firstly, the sectional area of the electric pile is increased, so that the volume of the electric pile is increased, and the volume power density of the electric pile is not improved. Secondly, the screw and nut tightening places are highly stressed, and it is often required that the tail plate has a certain thickness for uniform conduction pressure, for which reason the thickness of the tail plate must be increased, which increases the volume and weight, which is disadvantageous for increasing the power density of the stack. Finally, because the screw rods of the plurality of groups need to be fastened, the assembling and disassembling processes are complex, the efficiency is low, and the consistency of the force among the screw rods of each group is difficult to ensure, so that the stress of a pile is uneven.
The invention patent application with the application number of 201710138182.2 discloses a fastening structure which sequentially comprises an air port end plate, an air port end current collecting plate, a flow field plate, a membrane electrode group, a blind end current collecting plate and a pile elastic compensation structure, wherein the structures are sequentially fastened by a plurality of groups of pull belt structures, the pull belt structures comprise U-shaped metal pull belts, the tail ends of the metal pull belts are bent into circular rings matched with round rods of T-shaped bolts and then welded at the lap joint positions of the tail ends of the pull belts of the metal pull belts, and the T-shaped bolts on the metal pull belts penetrate through fixing holes on the air port end plate and are connected and fastened with the air port end plate through nuts. The limitation of the fastening structure is that: 1. the elastic compensation structure of the electric pile is realized by adopting a spring and a pressing plate, so that the volume and the weight of the fuel cell are increased; 2. the metal drawstring is fastened by adopting the drawstring structure, and when the metal drawstring is assembled, the metal drawstring is matched with the T-shaped bolt and is connected and fastened by the nut and the gas port end plate.
Disclosure of Invention
The invention mainly aims to provide the fastening device of the fuel cell stack, which is convenient to operate, simple and compact in structure, uniform in stress, convenient to maintain and disassemble and cost-saving.
In order to achieve the main object of the present invention, the present invention provides a fastening device for a fuel cell stack, including a front tail plate and a rear tail plate disposed at two ends of a stack direction of the fuel cell stack, the fastening device for a fuel cell stack further includes a first anti-arc portion, a first positive arc portion, a second anti-arc portion, a second positive arc portion, a first strap, a second strap and a third strap, wherein an arc surface of the first anti-arc portion is disposed back to the front tail plate and is disposed on a side surface of the front tail plate, an arc surface of the first positive arc portion is disposed back to the rear tail plate and is disposed on a side surface of the rear tail plate, an arc surface of the second positive arc portion is disposed back to the rear tail plate and is disposed on two ends of the first anti-arc portion, the second strap is disposed over the arc surface of the first positive arc portion and the arc surface of the second positive arc portion, and the third strap is disposed over the arc surface of the first positive arc portion and the arc surface of the second positive arc portion, and the second strap is disposed over the first, second side surface of the second positive arc portion and the second strap, and the second anti-arc portion of the first anti-arc portion and the second strap are made of elastic material, respectively.
In a further scheme, a first current collecting plate and a first insulating plate are arranged between the front tail plate and the fuel cell stack, the first insulating plate is positioned between the front tail plate and the first current collecting plate, the first current collecting plate is connected with one end of the fuel cell stack, a second current collecting plate and a second insulating plate are arranged between the rear tail plate and the fuel cell stack, the second insulating plate is positioned between the rear tail plate and the second current collecting plate, and the second current collecting plate is connected with the other end of the fuel cell stack.
Still further, the central angles of the first anti-arc part, the first positive arc part, the second anti-arc part and the second positive arc part are all smaller than 90 degrees.
In a further scheme, the number of the first positive arc parts and the number of the second positive arc parts are two, the number of the second binding bands is also two, the first anti-arc part is positioned between the two first positive arc parts, and the second anti-arc part is positioned between the two second positive arc parts.
In a further scheme, the number of the first anti-arc parts and the second anti-arc parts is three, and the number of the first binding bands is also three.
In a further scheme, the distances between the two adjacent first anti-arc parts are equal, and the distances between the two adjacent second anti-arc parts are also equal.
In a further scheme, the first anti-arc part and the second anti-arc part are positioned on the same plane, and the first positive arc part and the second positive arc part are also positioned on the same plane.
Still further, the third strap is sleeved on the first strap, the second strap, and a middle portion of the fuel cell stack.
In a further scheme, the front tail plate is provided with five first positioning grooves, the rear tail plate is provided with five second positioning grooves, the first anti-arc part and the first positive arc part are respectively positioned in the first positioning grooves, and the second anti-arc part and the second positive arc part are respectively positioned in the second positioning grooves.
In a further scheme, the distances between two adjacent first positioning grooves are equal, and the distances between two adjacent second positioning grooves are also equal.
According to the scheme, the first binding band, the second binding band and the third binding band are stretchable and easy to adjust in length, and are very fastened after being bonded by the welding device, so that the vibration resistance and the impact resistance of the fuel cell stack are improved. The first anti-arc part, the first positive arc part, the second anti-arc part and the second positive arc part are respectively made of elastic materials, and the positive and negative arc surface compensation structure can compensate the assembly force change caused by the expansion and contraction of the electric pile due to the internal temperature change, so that the stress of the fuel cell pile is uniform. And the fastening device of the fuel cell stack is convenient to operate, simple and compact in structure, convenient to maintain and disassemble and low in production cost.
Drawings
Fig. 1 is a first view of a structural view of an embodiment of a fastening device for a fuel cell stack according to the present invention.
Fig. 2 is a second view of the structure of the fastening device of the fuel cell stack according to the embodiment of the present invention.
Fig. 3 is a structural exploded view of an embodiment of the fastening device of the fuel cell stack of the present invention.
Fig. 4 is a first partial structural view of an embodiment of a fastening device for a fuel cell stack according to the present invention.
Fig. 5 is a second partial structural view of an embodiment of a fastening device for a fuel cell stack according to the present invention.
Fig. 6 is a third partial structural view of an embodiment of a fastening device for a fuel cell stack according to the present invention.
Detailed Description
Referring to fig. 1 to 6, the fastening device of the fuel cell stack includes a front tail plate 2, a rear tail plate 3, a first reverse arc portion 8, a first forward arc portion 7, a second reverse arc portion 10, a second forward arc portion 9, a first strap 5, a second strap 4, a third strap 6, a first current collecting plate 12, a first insulating plate 11, a second current collecting plate 14, and a second insulating plate 13, and the front tail plate 2 and the rear tail plate 3 are provided at both ends of the fuel cell stack 1 in the stacking direction, respectively. The first insulating plate 11 is located between the front end plate 2 and the first current collecting plate 12, and the first current collecting plate 12 is connected to one end of the fuel cell stack 1. The second insulating plate 13 is located between the back plate 3 and the second current collecting plate 14, and the second current collecting plate 14 is connected to the other end of the fuel cell stack 1.
The arc surface of the first arc-reversing portion 8 is provided on the side surface of the front tail plate 2 facing away from the front tail plate 2, and the arc surface of the first arc-reversing portion 7 is provided on the side surface of the front tail plate 2 facing the front tail plate 2. The arc surface of the second arc-shaped reverse arc part 10 is arranged on the side surface of the back plate 3 back to the back plate 3, and the arc surface of the second positive arc part 9 is arranged on the side surface of the back plate 3 back to the back plate 3. The first bandage 5 is sleeved on two ends of the first anti-arc part 8 and two ends of the second anti-arc part 10, the second bandage 4 is sleeved on the arc surface of the first positive arc part 7 and the arc surface of the second positive arc part 9, the third bandage 6 is sleeved on the first bandage 5, the second bandage 4 and the side surface of the fuel cell stack 1, and the third bandage 6 is sleeved on the first bandage 5, the second bandage 4 and the middle part of the fuel cell stack 1.
The central angles of the first anti-arc part 8, the first positive arc part 7, the second anti-arc part 10 and the second positive arc part 9 are smaller than 90 degrees, the first anti-arc part 8, the first positive arc part 7, the second anti-arc part 10 and the second positive arc part 9 are respectively made of elastic materials, the first anti-arc part 8 and the second anti-arc part 10 are positioned on the same plane, and the first positive arc part 7 and the second positive arc part 9 are also positioned on the same plane. In this embodiment, the number of the first positive arc portions 7 and the second positive arc portions 9 is two, the number of the second binding bands 4 is also two, the first anti-arc portion 8 is located between the two first positive arc portions 7, and the second anti-arc portion 10 is located between the two second positive arc portions 9. In this embodiment, the number of the first anti-arc portions 8 and the second anti-arc portions 10 is three, the number of the first binding bands 5 is also three, the distances between two adjacent first anti-arc portions 8 are equal, and the distances between two adjacent second anti-arc portions 10 are also equal. Five first positioning grooves 21 are formed in the front tail plate 2, five second positioning grooves (not labeled) are formed in the rear tail plate 3, the first anti-arc portion 8 and the first positive arc portion 7 are located in the first positioning grooves 21 respectively, the second anti-arc portion 10 and the second positive arc portion 9 are located in the second positioning grooves respectively, the distances between two adjacent first positioning grooves 21 are equal, and the distances between two adjacent second positioning grooves are also equal.
The fastening device of the fuel cell stack inserts a layer of pressure paper between each component during assembly for measuring the pressure distribution. The front tail plate 2 and the rear tail plate 3 are provided with arc surfaces which are very matched with the structures of the binding bands, the binding bands penetrate through a first reverse arc part 8, a first positive arc part 7, a second reverse arc part 10 and a second positive arc part 9 on the front tail plate 2 and the rear tail plate 3, the fuel cell stack 1 is compressed under the action of the assembly pressure of 50KN, after the preset compression ratio is reached, the first binding bands 5, the second binding bands 4 and the third binding bands 6 are respectively bonded by using a welding device, and the whole fuel cell stack 1 can be packaged. The first strap 5, the second strap 4 and the third strap 6 are high strength straps that are stretchable and easily adjustable in length, materials including, but not limited to, high molecular polymer materials, fiber-based composites, laminates, carbon fibers, natural fibers, stainless steel, other metallic materials including surface treatments, and the like. The number of the first binding bands 5, the second binding bands 4 and the third binding bands 6 is at least one, but not more than twenty, and the first binding bands 5, the second binding bands 4 and the third binding bands 6 are arranged in a crisscross arrangement or a parallel arrangement mode. The intersections of the first strap 5, the second strap 4 and the third strap 6 may or may not be fixed by welding. The strap may be made of a material that is consistent with or different from the strap material, including but not limited to resistance welding, arc welding, ultrasonic welding, laser welding, capacitive spot welding.
The fastening device of the fuel cell stack can be used for assembling at least two groups of fuel cell units, and the integrated back tail plate 3 is designed, so that the use of other parts is reduced, the cost is reduced, and the power density of the fuel cell stack 1 is improved. The materials of the fastening device include, but are not limited to, aluminum alloy, copper alloy, stainless steel, high molecular polymer, laminated material and the like, and the fastening device can be processed mechanically, cast, injection molded by die opening and laminated once-through molding, and the processing technology is diversified. The strap structure is freely stretchable and has an easily adjustable length, and is very tight after being bonded by the welding device, so that the vibration resistance and impact resistance of the fuel cell stack 1 are improved. The positive and negative arc surface compensation structure of the elastic material is adopted, so that the assembly force change caused by heat expansion and cold contraction of the electric pile due to the internal temperature change can be compensated. The first insulating plate 11 and the second insulating plate 13 are adopted to play roles in insulating and dispersing stress, and materials of the first insulating plate 11 and the second insulating plate 13 include, but are not limited to, teflon, polyoxymethylene, ABS engineering plastics and the like. Therefore, the fastening device of the fuel cell stack of the present embodiment is convenient to operate, simple and compact in structure, convenient to repair and disassemble, and cost-effective, and the stress of the fuel cell stack 1 is uniform.
The above embodiments are only preferred examples of the present invention and are not intended to limit the scope of the present invention, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present invention.
Claims (10)
1. The fastening device of the fuel cell stack comprises a front tail plate and a rear tail plate which are arranged at two ends of the stacking direction of the fuel cell stack, and is characterized in that:
the fastening device of the fuel cell stack further comprises a first reverse arc part, a first positive arc part, a second reverse arc part, a second positive arc part, a first strap, a second strap and a third strap;
the arc surface of the first arc-resisting part is arranged on the side surface of the front tail plate back to the front tail plate, and the arc surface of the first arc-resisting part is arranged on the side surface of the front tail plate towards the front tail plate;
the arc surface of the second anti-arc part is arranged on the side surface of the back plate back to the back plate, and the arc surface of the second positive arc part is arranged on the side surface of the back plate towards the back plate;
the first binding band is sleeved on two ends of the first anti-arc part and two ends of the second anti-arc part, the second binding band is sleeved on the arc surface of the first positive arc part and the arc surface of the second positive arc part, and the third binding band is sleeved on the first binding band, the second binding band and the side surface of the fuel cell stack;
the first anti-arc part is positioned between the two first positive arc parts, and the second anti-arc part is positioned between the two second positive arc parts
The first reverse arc portion, the first positive arc portion, the second reverse arc portion, and the second positive arc portion are respectively made of an elastic material.
2. The fastening device of a fuel cell stack according to claim 1, wherein:
a first current collecting plate and a first insulating plate are arranged between the front tail plate and the fuel cell stack, the first insulating plate is positioned between the front tail plate and the first current collecting plate, and the first current collecting plate is connected with one end of the fuel cell stack;
a second current collecting plate and a second insulating plate are arranged between the back tail plate and the fuel cell stack, the second insulating plate is positioned between the back tail plate and the second current collecting plate, and the second current collecting plate is connected with the other end of the fuel cell stack.
3. The fastening device of a fuel cell stack according to claim 1, wherein:
the central angles of the first reverse arc part, the first positive arc part, the second reverse arc part and the second positive arc part are all smaller than 90 degrees.
4. A fastening device for a fuel cell stack according to any one of claims 1 to 3, characterized in that:
the number of the first positive arc parts and the number of the second positive arc parts are two, and the number of the second binding bands is also two.
5. The fastening device of a fuel cell stack according to claim 4, wherein:
the number of the first anti-arc parts and the second anti-arc parts is three, and the number of the first binding bands is also three.
6. The fastening device of a fuel cell stack according to claim 5, wherein:
the distances between the adjacent two first anti-arc parts are equal, and the distances between the adjacent two second anti-arc parts are also equal.
7. The fastening device of a fuel cell stack according to claim 6, wherein:
the first anti-arc part and the second anti-arc part are positioned on the same plane, and the first positive arc part and the second positive arc part are also positioned on the same plane.
8. The fastening device of a fuel cell stack according to claim 7, wherein:
the third strap is sleeved on the first strap, the second strap and the middle of the fuel cell stack.
9. The fastening device of a fuel cell stack according to claim 8, wherein:
five first positioning grooves are formed in the front tail plate, five second positioning grooves are formed in the rear tail plate, the first anti-arc portion and the first positive arc portion are respectively located in the first positioning grooves, and the second anti-arc portion and the second positive arc portion are respectively located in the second positioning grooves.
10. The fastening device of a fuel cell stack according to claim 9, wherein:
the distances between two adjacent first positioning grooves are equal, and the distances between two adjacent second positioning grooves are also equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810197850.3A CN108346814B (en) | 2018-03-11 | 2018-03-11 | Fastening device for fuel cell stack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810197850.3A CN108346814B (en) | 2018-03-11 | 2018-03-11 | Fastening device for fuel cell stack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108346814A CN108346814A (en) | 2018-07-31 |
| CN108346814B true CN108346814B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810197850.3A Active CN108346814B (en) | 2018-03-11 | 2018-03-11 | Fastening device for fuel cell stack |
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| Country | Link |
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| CN (1) | CN108346814B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019204529A1 (en) * | 2019-04-01 | 2020-10-01 | Contitech Antriebssysteme Gmbh | Clamping and holding device |
| CN114583370B (en) * | 2019-12-31 | 2024-01-30 | 宁德时代新能源科技股份有限公司 | Battery module, battery pack, device and method for assembling battery module |
| CN113224345B (en) * | 2021-05-07 | 2022-06-07 | 北京理工大学 | Adjustable fuel cell end plate packaging structure |
| CN114865039B (en) * | 2022-05-27 | 2024-02-02 | 上海安池科技有限公司 | End plate assembly and fuel cell stack |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002063930A (en) * | 2000-08-14 | 2002-02-28 | Sony Corp | Stack structure of fuel cell |
| JP2003151612A (en) * | 2001-11-12 | 2003-05-23 | Nissan Motor Co Ltd | Fuel cell |
| JP2009187777A (en) * | 2008-02-06 | 2009-08-20 | Panasonic Corp | Polymer electrolyte fuel cell |
| CN107732276A (en) * | 2017-10-30 | 2018-02-23 | 深圳市南科燃料电池有限公司 | A kind of fuel cell that can improve end plate stress |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015056084A1 (en) * | 2013-10-19 | 2015-04-23 | Daimler Ag | Fuel cell stacks with increased natural frequency |
-
2018
- 2018-03-11 CN CN201810197850.3A patent/CN108346814B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002063930A (en) * | 2000-08-14 | 2002-02-28 | Sony Corp | Stack structure of fuel cell |
| JP2003151612A (en) * | 2001-11-12 | 2003-05-23 | Nissan Motor Co Ltd | Fuel cell |
| JP2009187777A (en) * | 2008-02-06 | 2009-08-20 | Panasonic Corp | Polymer electrolyte fuel cell |
| CN107732276A (en) * | 2017-10-30 | 2018-02-23 | 深圳市南科燃料电池有限公司 | A kind of fuel cell that can improve end plate stress |
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| CN108346814A (en) | 2018-07-31 |
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