CN113745624A - Fuel cell stack, fuel cell and vehicle - Google Patents
Fuel cell stack, fuel cell and vehicle Download PDFInfo
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- CN113745624A CN113745624A CN202110873366.XA CN202110873366A CN113745624A CN 113745624 A CN113745624 A CN 113745624A CN 202110873366 A CN202110873366 A CN 202110873366A CN 113745624 A CN113745624 A CN 113745624A
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- cell stack
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- 239000000446 fuel Substances 0.000 title claims abstract description 100
- 238000004804 winding Methods 0.000 claims abstract description 83
- 230000000670 limiting effect Effects 0.000 claims description 11
- 238000009413 insulation Methods 0.000 abstract description 12
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- 239000010959 steel Substances 0.000 abstract description 5
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- 210000001503 joint Anatomy 0.000 description 8
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- 239000000463 material Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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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
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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
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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
- H01M8/10—Fuel cells with solid electrolytes
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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
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells 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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a fuel cell stack, a fuel cell and a vehicle, wherein the fuel cell stack comprises at least 2 winding belts, an insulating rod and binding heads, the number of the binding heads is the same as that of the winding belts; the at least 2 winding belts are arranged at intervals, two ends of each winding belt are connected through the binding heads to form a fastening ring, and the fastening ring is sleeved on the fuel cell stack; the insulating rod is clamped between the reactor core of the fuel cell stack and the winding belt, and two ends of the insulating rod are respectively contacted with the air inlet end insulating plate and the blind end insulating plate of the fuel cell stack; and a sunk groove for accommodating the binding head is formed in an air inlet end plate or a blind end closing plate of the fuel cell stack. The binding head falls in the heavy inslot, reduces the height that the binding head is outstanding to be admitted air the end plate, and the insulating rod is completely cut off the electric transmission between reactor core and winding area, realizes the insulation between steel band and the pile through the insulating rod, need not increase the end plate area, improves power bulk density.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell stack, a fuel cell and a vehicle.
Background
Proton Exchange Membrane Fuel Cell (PEMFC) is a power generation device that directly converts chemical energy of fuel into electric energy, and has the advantages of low working temperature, fast start, high specific power, simple structure, convenient operation, etc., so that the fuel cell is widely applied to industries such as automobile industry, energy power generation, ship industry, aerospace, household power supply, etc.
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 increase the output of the whole fuel cell, a plurality of single cells are stacked in series to form a fuel cell stack. In order to make the contact resistance of the fuel cell as small as possible, a certain force must be applied so that the gas diffusion layer is compressed, and thus, it is necessary to provide a fastener outside the stack.
In the prior art, a fuel cell stack is fixed by a plurality of screws, and on one hand, it is difficult to ensure that the tightening force of two opposite screws on the fuel cell stack is consistent, so that the anode end plate and the cathode end plate are easily bent due to uneven stress, so that the pressure on a membrane electrode and a bipolar plate of the fuel cell stack is uneven, and the performance of the fuel cell stack is further influenced. And the screw rod is fixed on the end plate through the nut, and the nut and the head of the screw rod occupy larger volume, so that the power density of the whole stack volume is reduced. On the other hand, in consideration of insulativity, the area of the end plate is larger than that of the end face of the electric pile, so that a certain safety gap is formed between the screw and the electric pile, air insulation is realized, and the volume power density of the whole pile is further reduced.
In summary, the screw fixing scheme in the prior art is not favorable for improving the volume power density, and has a certain influence on the performance of the fuel cell stack.
Disclosure of Invention
In order to solve the technical problems, the invention provides a fuel cell stack, a fuel cell and a vehicle, which obviously improve the power density of the fuel cell stack.
The technical scheme adopted for realizing the purpose of the invention is that the fuel cell stack comprises at least 2 winding belts, insulating rods and binding heads, wherein the number of the binding heads is the same as that of the winding belts; the at least 2 winding belts are arranged at intervals, two ends of each winding belt are connected through the binding heads to form a fastening ring, and the fastening ring is sleeved on the fuel cell stack; the insulating rod is clamped between the reactor core of the fuel cell stack and the winding belt, and two ends of the insulating rod are respectively contacted with the air inlet end insulating plate and the blind end insulating plate of the fuel cell stack; and a sunk groove for accommodating the binding head is formed in an air inlet end plate or a blind end closing plate of the fuel cell stack.
Furthermore, hook parts are arranged at two ends of the winding belt, and the winding belt is connected with the binding head through the hook parts.
Furthermore, the binding head is of a split structure and comprises a threaded fastener and two joints, two ends of the winding belt are connected with the two joints respectively, and the two joints are connected through the threaded fastener.
Further, each joint all includes connecting portion and is located the spacing portion at connecting portion both ends, two couple parts of winding area respectively hook on two connecting portion that connect to it is spacing through spacing portion, all offer in the spacing portion and be used for installing the butt joint hole of threaded fastener.
Further, the winding band is wound on two opposite side surfaces parallel to the length direction of the bipolar plate of the fuel cell stack and the air inlet end plate or the blind end sealing plate, and 1 insulating rod is arranged between the part of the winding band on the two opposite side surfaces and the core.
Further, at least one of the two insulating rods positioned on the outer side has a bent portion covering an end surface of the core.
Further, the insulator spindle is the cell type, the insulator spindle suit is in on the winding area, the insulator spindle respectively with the reactor core with the winding area contacts.
Furthermore, a boss used for limiting the axial movement of the insulating rod is arranged on the side surface of the air inlet end insulating plate and/or the blind end insulating plate.
Based on the same inventive concept, the invention also provides a fuel cell, which comprises a shell and the fuel cell stack, wherein the fuel cell stack is arranged in the shell.
Based on the same inventive concept, the invention also provides a vehicle comprising the fuel cell.
According to the technical scheme, the fuel cell stack provided by the invention comprises at least 2 winding belts, insulating rods and binding heads, wherein the number of the binding heads is the same as that of the winding belts; wherein: at least 2 winding areas are arranged at intervals to guarantee fastening force in the arrangement direction, the two ends of each winding area are connected through binding heads to form a fastening ring, the fastening ring is sleeved on the fuel cell stack, and the fixation and the limitation of the air inlet end plate and the blind end sealing plate in the encapsulation direction are realized. The insulator spindle presss from both sides and establishes between the reactor core of fuel cell pile and the winding area, and the both ends of insulator spindle contact with the inlet end insulation board and the dead end insulation board of fuel cell pile respectively, the insulating rod is isolated the clearance between winding area and the pile, the insulating rod is isolated the electricity transmission between reactor core and the winding area, realize the insulation between steel band and the pile through the insulator spindle, need not increase the end plate area, avoid the end plate area to be greater than the terminal surface area of reactor core, and then improve the volume power density. Be provided with the heavy groove that is used for holding the ligature head on the inlet end plate or the blind end shrouding of fuel cell pile for the ligature head in ligature winding area falls in the heavy groove, reduces the height that the pile ligature head is outstanding inlet end plate, improves power bulk density.
The fuel cell stack naturally has all the beneficial effects, the winding belt is used as a fastening piece, the air inlet end plate is provided with the sunk groove to accommodate the binding head of the winding belt, the whole stack volume is reduced, and the fastening force of the winding belt can be adjusted through the binding head. Set up the insulator spindle between winding area and the pile, improve insulating effect, compare in prior art, the end plate area reduces, further improves volume power density.
Drawings
Fig. 1 is an overall schematic view of a fuel cell stack provided in embodiment 1 of the present invention;
FIG. 2 is an exploded schematic view of the fuel cell stack of FIG. 1;
FIG. 3 is a schematic view of a partial connection of the wrapping band, the binding head and the inlet end plate of FIG. 1;
FIG. 4 is a schematic view of the wrapping band of FIG. 1 partially attached to the blind end closure plate and the disc spring support plate;
FIG. 5 is an assembled schematic view of the wrapping band, the binding head and the insulating rod of FIG. 1;
fig. 6 is an exploded view of fig. 5.
Description of the drawings: 1-a winding belt, 11-a hook part; 2-binding head, 21-joint, 22-connecting part, 23-limiting part and 24-threaded fastener; 3-insulating rod, 31-groove, 32-bending part; 4-air inlet end plate, 41-sink groove; 5-blind end closing plate, 51-blind end plate, 52-disc spring support plate; 6, a reactor core; 7-an inlet end insulating plate; 8-an air inlet end collector plate; 9-a blind end collector plate; 10-dead end insulation board.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
The invention provides a fuel cell stack, a fuel cell and a vehicle, and aims to solve the technical problems that in the prior art, a stack fastener is large in size, the whole stack volume power density is small and is not beneficial to the improvement of the volume power density due to the fact that a safety gap is needed, and the stack is carried and applied on the vehicle. The invention is described in detail below by means of 3 examples:
example 1
As shown in fig. 1 to 6, the present invention provides a fuel cell stack, which includes at least 2 wrapping tapes 1, an insulating rod 3, and the same number of banding heads 2 as the number of the wrapping tapes 1. Wherein: at least 2 winding areas 1 interval settings to on arranging the direction, guarantee the fastening power, the both ends of winding area 1 are connected through 1 ligature head 2, in order to form the tighrening ring, and the tighrening ring cover is established on the fuel cell pile, realizes that inlet end plate 4 and blind end shrouding 5 are fixed spacing in the encapsulation orientation. Insulator spindle 3 presss from both sides and establishes between the reactor core 6 of fuel cell pile and winding area 1, and the both ends of insulator spindle 3 contact with inlet end insulation board 7 and the dead end insulation board 10 of fuel cell pile respectively, the clearance between the isolated winding area 1 of insulator spindle 3 and the pile, the isolated electricity transmission between reactor core 6 of insulator spindle 3 and the winding area 1, realize the insulation between steel band and the pile through insulator spindle 3, need not increase the end plate area, avoid the end plate area to be greater than the terminal surface area of reactor core 6, and then improve the volume power density. And the air inlet end plate 4 or the blind end closing plate 5 of the fuel cell stack is provided with a sinking groove 41 for accommodating the binding head 2, the binding head 2 for binding and winding the belt 1 falls in the sinking groove 41, the height of the binding head 2 protruding out of the air inlet end plate 4 of the stack is reduced, and the power volume density is improved.
In the fuel cell stack in the prior art, generally, the length and the width of the fuel cell stack may differ greatly, and in order to optimize the fastening effect, in this embodiment, the winding tapes 1 are wound around the two opposite sides parallel to the length direction of the bipolar plate of the fuel cell stack and the air inlet end plate 4 or the blind end closing plate 5 of the two opposite sides, that is, the insulating rods 3 are respectively disposed on the two opposite sides in the length direction of the fuel cell stack, the present invention does not specifically limit the number of the insulating rods 3, one insulating rod 3 may correspond to a plurality of winding tapes 1, and in order to reduce the quality of the fuel cell stack and reduce the material consumption, in this embodiment, 1 insulating rod 3 is disposed between the part of the winding tape 1 located on the two opposite sides and the core 6.
In the prior art, generally, the thickness of the inlet end plate 4 is greater than that of the blind end sealing plate 5, so as not to affect the operation of the end plate, and the strength is ensured, in this embodiment, the sunk groove 41 for accommodating the binding head 2 is formed on the inlet end plate 4.
In the prior art, the core 6 (membrane electrode + bipolar plate) is only pressed and fixed in the packaging direction, and the periphery is released without fixation. This makes the laying of pile have specific requirement, can only follow specific orientation installation, otherwise the duplication can receive external service environment (gravity, vibration, impact etc.) influence to lead to the position to change, influences pile performance and security, and this results in the pile to receive great restriction when the vehicle is used.
Because the fuel cell pile can receive external service environment (gravity, vibration, impact, etc.) to influence and lead to the position to change, influence pile performance and security, so need fix a position the restriction to insulator spindle 3, because insulator spindle 3 sets up between winding area 1 and reactor core 6, natural winding area 1 plays Y to spacing effect to insulator spindle 3, in order to take 1 to carry out X to spacing to insulator spindle 3 through the winding, in this embodiment, insulator spindle 3 is the cell type, insulator spindle 3 suit is on winding area 1, insulator spindle 3 respectively with reactor core 6 and winding area 1 contact. Meanwhile, the insulating rod 3 is in contact with the pile repeating piece, the peripheries of the bipolar plate and the membrane electrode can be fixed, and the packaging direction is the axial fixation of the winding belt 1, so that the pile repeating piece is restrained in six directions, the repeating piece is effectively fixed, and the position of the repeating piece cannot be influenced by the external use environment (gravity, vibration, impact and the like).
The structure of the insulating rod 3 is not particularly limited, and in order to save materials and effectively control the quality of the assembled fuel cell stack, in the embodiment, the groove 31 is formed in one side of the insulating rod 3, which is far away from the reactor core 6, the winding belt 1 is arranged in the groove 31, and the groove 31 limits the movement of the insulating rod 3 relative to the winding belt 1, so that compared with the insulating rod 3 with a sleeve rod structure, the groove 31 is formed in only one side of the insulating rod 3, and the protruding thickness of the insulating rod 3 on the side surface of the reactor core 6 can be reduced.
Because the ligature head 2 of taking 1 is held in order to the installation, need correspond at the interval on air inlet end plate 4 and set up heavy groove 41, in order to guarantee the pile performance, air inlet end plate 4 adopts the scheme that both sides were intake in this embodiment, therefore two terminal surfaces of fuel cell pile can't be spacing through setting up winding area 1. In order to realize the X-direction limitation of the reactor core 6, the direction is arranged along the interval of at least 2 winding belts 1, at least one of the two insulating rods 3 corresponding to the winding belt 1 close to the end surface of the reactor core 6, namely, the two insulating rods 3 positioned on the outer side, at least one of the insulating rods 3 is provided with a bending part 32 for wrapping the end surface of the reactor core 6, the insulating rod 3 on the outer side is wrapped and attached to the reactor core 6 from the side surface X through the bending part 32, and the winding belts 1 and the insulating rods 3 limit the displacement of the reactor in each direction.
For the convenience of replacement and reduction of assembly difficulty, the two ends of the winding belt 1 are provided with the hook parts 11, and the winding belt 1 passes through the hook parts 11
In order to facilitate the length of adjusting the tighrening ring to adjust the fastening power, simultaneously in order to increase the commonality and the practicality of tighrening ring, in this embodiment, ligature head 2 is split type structure, and ligature head 2 includes threaded fastener 24 and two joints 21, and one joint 21 is connected respectively at the both ends of winding area 1, and two joints 21 pass through threaded fastener 24 and connect. Improve the connecting distance of two tying heads 2 of accessible regulation simultaneously and adjust fastening power, the suitability is strong.
The specific structure of the binding head 2 is not limited, as long as the use requirement is met, in the embodiment, each binding head 2 comprises a connecting part 22 and limiting parts 23 positioned at two ends of the connecting part 22, the two hook parts 11 of the winding belt 1 are respectively hooked on the connecting parts 22 of the two joints 21 and limited by the limiting parts 23, butt-joint holes for installing threaded fasteners 24 are formed in the limiting parts 23, and the distance between the two joints 21 is adjusted by the threaded fasteners 24 arranged in the butt-joint holes.
The length of the insulating rod 3 is not limited, and when the length of the insulating rod 3 is enough to meet the requirements of the air inlet end insulating plate 7 and the blind end insulating plate 10 respectively under any condition, an additional structure for limiting the Z direction of the insulating rod 3 does not need to be designed. When insulation can not be guaranteed all the time, a positioning structure needs to be designed. In this embodiment, a boss for limiting the axial movement of the insulating rod 3 is provided on the side surface of the air inlet end insulating plate 7 and/or the dead end insulating plate 10, the boss is provided at a position corresponding to the insulating rod 3, the Z-direction movement distance of the insulating rod 3 is limited within a certain range, the insulating rod 3 is tightly attached to the stack repeating unit (reactor core 6), and the insulating rod 3 isolates the electrical transmission between the stack repeating unit and the winding belt 1.
The wrapping tape 1 provided by the present invention may be a non-metal material, such as a polymer material, a fiber composite material or a belt, but in order to ensure the connection strength between the wrapping tape 1 and the binding head 2 and ensure the stability of the fastening force after the binding head 2 is fixed, in this embodiment, the wrapping tape 1 is preferably a metal material, such as a steel belt.
The cross-sectional shapes of the winding belt 1 and the insulating rod 3 are not particularly limited, and in order to reduce the volume, reduce the occupied space, increase the connection limiting strength and improve the insulating effect of the insulating rod 3, the cross-sections of the insulating rods 3 are preferably polygonal. In this embodiment, the insulating rod 3 is a rod member with a rectangular cross section, so that the insulating rod 3 is in surface contact with the winding belt 1 and the reactor core 6, and insulation and limiting effects are guaranteed.
In order to reduce the wear of the winding belt 1, avoid stress concentration, and ensure the fastening effect, in this embodiment, the recessed groove 41 of the air inlet end plate 4 is provided with a notch at the portion for contacting the winding belt 1, and the blind end sealing plate 5 is provided with a notch at the portion for contacting the winding belt 1.
The invention does not limit the concrete components and structure of the side of the gas inlet end plate 4 of the fuel cell stack, and the prior art can be referred to, in the embodiment, the gas inlet end plate 4, the gas inlet end insulating plate 7, the gas inlet end current collecting plate 8 and the carbon paper are sequentially arranged from the outer side to the inner side of the gas inlet end plate 4 of the fuel cell stack.
Similarly, the invention does not limit the specific components and structure of the blind end side of the fuel cell stack, and can refer to the prior art, that is, at least comprising a blind end current collecting plate 9, a blind end insulating plate 10 and a blind end plate 51 which are sequentially arranged from the inside to the outside of the fuel cell stack, at this time, the blind end plate 51 is used as a blind end closing plate 5, and the side surface of the air inlet end plate 4 and the side surface of the blind end plate 51 are correspondingly provided with unfilled corners for avoiding the stress concentration of the winding belt 1.
Because the working temperature span of the fuel cell stack is large, for example, -20 ℃ to 90 ℃, the temperature changes can cause thermal expansion and cold contraction of each component at different moments, in order to ensure the compression ratio between the membrane electrode and the bipolar plate and reduce the influence of the thermal expansion and cold contraction on the performance of the fuel cell stack, in the embodiment, the outer side of the blind end plate 51 is also provided with the disc spring support plate 52, the disc spring support plate 52 is provided with disc spring mounting holes at intervals, and the disc springs are correspondingly arranged between the blind end plate 51 and the disc spring support plate 52 and can realize self-adaptive adjustment within a certain range. At this time, the disc spring support plate 52 serves as the blind end seal plate 5, and the air inlet end plate 3 and the disc spring support plate 52 are distributed at two ends of the packaging direction of the fuel cell stack, so in this embodiment, the disc spring support plate 52 is provided with a notch for avoiding stress concentration of the winding belt 1, the winding belt 1 is sleeved on the air inlet end plate 3 and the disc spring support plate 52 to apply fastening force, and compression ratios between the membrane electrode and the bipolar plate under different states of thermal expansion and cold contraction are ensured through the disc spring.
The fuel cell stack provided by the invention adopts the winding belt 1 as a fastening piece, the air inlet end plate 4 is provided with the sunk groove 41 to accommodate the binding head 2 of the winding belt 1, the binding head 2 falls in the groove 31, the height of the binding head 2 protruding out of the air inlet end plate 4 is reduced, the volume of the whole stack is reduced, no extra space is occupied, and the volume power density is improved and the carrying application of the stack on a vehicle is facilitated. The insulating rod 3 is additionally arranged between the winding belt 1 and the reactor core 6, so that the insulating effect is improved, the area of the end plate is reduced, and the volume power density is further improved.
Example 2
Based on the same inventive concept, the invention also provides a fuel cell, which comprises a shell and the fuel cell stack provided by the embodiment 1, wherein the fuel cell stack is arranged in the shell. The type and type of the fuel cell are not particularly limited, and may be any fuel cell in the prior art, such as a proton exchange membrane fuel cell, and other structures of the fuel cell, which are not described in detail in the related art, are disclosed in the related art and will not be described herein.
Example 3
Based on the same inventive concept, the invention also provides a vehicle which comprises the fuel cell provided by the embodiment 2, namely, the fuel cell stack of the vehicle adopts the structure of the fuel cell stack provided by the embodiment 1 and is fixedly connected through the winding belt 1 and the insulating rod 3. The present invention is not limited to the kind and type of the vehicle, and may be any vehicle in the prior art, such as a household trolley, a passenger car, a truck, etc., and other structures of the vehicle, which are not described in detail in the prior art, may refer to the related disclosure of the prior art, and will not be described herein.
Through the embodiment, the invention has the following beneficial effects or advantages:
1) the fuel cell pile provided by the invention adopts the winding belt as a fastening piece, the air inlet end plate is provided with the sink groove to accommodate the binding head of the winding belt, the binding head falls in the groove, the height of the binding head protruding out of the air inlet end plate is reduced, the whole pile volume is reduced, no extra space is occupied, and the fuel cell pile is beneficial to the improvement of volume power density and the carrying application of the pile on a vehicle.
2) Set up the insulator spindle between winding area and the reactor core, the insulating spindle completely cuts off the clearance between winding area and the pile, and the insulator spindle completely cuts off the electricity transmission between reactor core and the winding area, realizes the insulation between steel band and the pile through the insulator spindle, need not increase the end plate area, and then improves volume power density.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A fuel cell stack is characterized by comprising at least 2 winding belts, insulating rods and binding heads, wherein the number of the binding heads is the same as that of the winding belts; the at least 2 winding belts are arranged at intervals, two ends of each winding belt are connected through the binding heads to form a fastening ring, and the fastening ring is sleeved on the fuel cell stack; the insulating rod is clamped between the reactor core of the fuel cell stack and the winding belt, and two ends of the insulating rod are respectively contacted with the air inlet end insulating plate and the blind end insulating plate of the fuel cell stack; and a sunk groove for accommodating the binding head is formed in an air inlet end plate or a blind end closing plate of the fuel cell stack.
2. The fuel cell stack according to claim 1, wherein both ends of the wrapping tape are provided with hook portions, and the wrapping tape is connected to the binding heads through the hook portions.
3. The fuel cell stack according to claim 2, wherein the binding head is a split structure, the binding head includes a threaded fastener and two joints, both ends of the wrapping tape are respectively connected to the two joints, and the two joints are connected by the threaded fastener.
4. The fuel cell stack according to claim 3, wherein each of the joints includes a connecting portion and a limiting portion at both ends of the connecting portion, the two hook portions of the winding band are respectively hooked on the connecting portions of the two joints and are limited by the limiting portions, and the limiting portions are each formed therein with a butt hole for mounting the threaded fastener.
5. The fuel cell stack of claim 1, wherein the wrapping tape is wound around two opposite sides parallel to a length direction of a bipolar plate of the fuel cell stack and the inlet end plate or the blind end cover plate, and 1 insulating rod is disposed between a portion of the wrapping tape located at the two opposite sides and the core.
6. The fuel cell stack according to claim 5, wherein at least one of the two insulating rods located on the outer side has a bent portion that covers an end surface of the core.
7. The fuel cell stack of any one of claims 1-6 wherein the insulating rod is channel shaped, the insulating rod being sleeved over the winding strip, the insulating rod being in contact with the core and the winding strip, respectively.
8. The fuel cell stack according to any one of claims 1 to 6, wherein a boss for restricting the axial movement of the insulating rod is provided on a side surface of the inlet end insulating plate and/or the dead end insulating plate.
9. A fuel cell comprising a housing and the fuel cell stack of any one of claims 1-8 disposed within the housing.
10. A vehicle characterized by comprising the fuel cell according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110873366.XA CN113745624A (en) | 2021-07-30 | 2021-07-30 | Fuel cell stack, fuel cell and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110873366.XA CN113745624A (en) | 2021-07-30 | 2021-07-30 | Fuel cell stack, fuel cell and vehicle |
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| CN113745624A true CN113745624A (en) | 2021-12-03 |
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| CN202110873366.XA Pending CN113745624A (en) | 2021-07-30 | 2021-07-30 | Fuel cell stack, fuel cell and vehicle |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201130692Y (en) * | 2007-12-07 | 2008-10-08 | 上海神力科技有限公司 | Encapsulation apparatus for fastening belt |
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