CN114464864A - High-voltage assembly applied to fuel cell and fuel cell - Google Patents
High-voltage assembly applied to fuel cell and fuel cell Download PDFInfo
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- CN114464864A CN114464864A CN202111173444.1A CN202111173444A CN114464864A CN 114464864 A CN114464864 A CN 114464864A CN 202111173444 A CN202111173444 A CN 202111173444A CN 114464864 A CN114464864 A CN 114464864A
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- 239000000446 fuel Substances 0.000 title claims abstract description 67
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 213
- 229910052802 copper Inorganic materials 0.000 claims abstract description 213
- 239000010949 copper Substances 0.000 claims abstract description 213
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000012212 insulator Substances 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 230000010354 integration Effects 0.000 abstract description 8
- 238000005452 bending Methods 0.000 description 8
- 238000009413 insulation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000002648 laminated material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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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
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
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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
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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
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a high-voltage component applied to a fuel cell and the fuel cell, wherein the fuel cell comprises two galvanic piles, and the high-voltage component comprises two high-voltage output parts and three copper bars; two high-voltage output portion all include the high-voltage terminal of electricity connection and connect the copper bar, and is three the copper bar is used for establishing ties two the output of pile extremely forms positive link and negative pole link, positive link with the negative pole link respectively with two high-voltage output portion's connection copper bar is connected. On one hand, the invention can realize the integration of two electric piles and improve the power output of the fuel cell. On the other hand, the assembly process is simplified while the high-voltage design requirement is met, the high-voltage output part is connected with the upper box body of the fuel cell shell in advance, the three copper bars are also connected and arranged on the corresponding galvanic pile, and after the upper box body and the lower box body are buckled, only the positive connecting end and the negative connecting end are required to be connected with the high-voltage terminals of the corresponding high-voltage output part respectively.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a high-voltage component applied to a fuel cell and the fuel cell.
Background
The fuel cell stack is generally formed by connecting a plurality of single cells each including a membrane electrode and a bipolar plate in series, a seal ring is provided between the membrane electrode and the bipolar plate, and both ends of the plurality of single cells are pressed, insulated, and current-outputted through an end plate, an insulating plate, a collector plate, and the like. The output voltage of the fuel cell stack is high; meanwhile, the membrane electrode of the fuel cell has large active area, high working current density and large output current. In recent years, as the requirements of fuel cell automobiles on the output power of fuel cell systems are gradually increased, the output voltage and the output current of fuel cell stacks are also gradually increased; on the other hand, the electrical safety requirements of fuel cell vehicles for fuel cell stacks are also gradually increasing due to the safety requirements of the whole vehicles. The high voltage design inside the fuel cell stack therefore requires full consideration of electrical safety. Meanwhile, the fuel cell needs to fully consider the electric clearance and creepage distance check and the related insulation design due to the small space.
However, the fuel cell stack in the prior art has the following two technical problems: one, the output power of the fuel cell in the prior art is limited because the number of single cells connected in series by a single stack is limited; secondly, the internal high-voltage design and assembly process is complex, and the situation of inconvenient assembly may exist, which is not favorable for the arrangement of high-voltage design.
Disclosure of Invention
In order to solve the technical problems and achieve the purpose of the invention, the invention provides a high-voltage component applied to a fuel cell and the fuel cell, which can improve the power output of the fuel cell and solve the high-voltage design layout and assembly.
The technical scheme for realizing the aim of the invention is that the high-voltage component is applied to the fuel cell, the fuel cell comprises two galvanic piles, the high-voltage component comprises two high-voltage output parts and three copper bars, wherein: two high-voltage output portion all include the high-voltage terminal of electricity connection and connect the copper bar, and is three the copper bar is used for establishing ties two the output of pile extremely forms positive link and negative pole link, positive link with the negative pole link respectively with two high-voltage output portion's connection copper bar is connected.
Further, the three copper bars are respectively a first copper bar, a second copper bar and a third copper bar; one end of the first copper bar is used for being connected with the positive output electrode of one of the galvanic piles, and the other end of the first copper bar forms the positive electrode connecting end; one end of the second copper bar is used for being connected with the negative output electrode of the other galvanic pile, and the other end of the second copper bar forms the negative electrode connecting end; two ends of the third copper bar are respectively connected with the other positive output electrode and the other negative output electrode of the two galvanic piles; the positive connecting end and the negative connecting end are respectively connected with the two connecting copper bars through high-voltage fasteners.
Further, the first copper bar and the second copper bar respectively comprise more than 1 soft row segment and more than 2 hard row segments, the soft row segments and the hard row segments are alternately distributed, and both ends of the first copper bar and the second copper bar are hard row segments.
Furthermore, at least 1 of the soft row sections are of a bending structure, so that two ends of the first copper bar/the second copper bar where the bending structure is located are located on two different planes.
Furthermore, an insulating support is arranged on the third copper bar, two ends of the insulating support are respectively connected with the second copper bar and the third copper bar, and the axis of the insulating support is arranged at an angle with the plane of the third copper bar and the plane of the second copper bar; the soft row section of the second copper bar and the first copper bar are distributed on two sides of the insulating support.
Further, the third copper bar is provided with a concave part, and the insulating support is arranged in the concave part.
Furthermore, the connecting copper bar is provided with a bending part, so that two ends of the connecting copper bar are positioned on two different planes.
Furthermore, the end parts, used for connecting the output electrode of the galvanic pile, of the three copper bars are provided with at least two mounting holes, connecting pieces are arranged in the mounting holes, and the three copper bars are equally divided into three parts, namely fixed through the connecting pieces and the output electrode of the galvanic pile.
Based on the same inventive concept, the invention also provides a fuel cell, which comprises a shell, two electric stacks and the high-voltage component; the shell comprises an upper box body and an upper box body, and the upper box body and the lower box body surround to form an installation cavity; the two electric piles are arranged in the mounting cavity, and output electrodes of the two electric piles are arranged in series; the two high-voltage output parts are arranged on the upper box body at intervals, and the output electrodes of the two galvanic piles are connected in series through the three copper bars.
Further, the high-voltage assembly further comprises an insulating plate, and the shell and the three copper bars are distributed on two sides of the insulating plate;
two first assembling holes are formed in the insulating plate at intervals, and the two high-voltage terminals are respectively arranged in the first assembling holes in a penetrating mode;
and a second assembly hole is formed in the upper box body and used for connecting the positive connecting end/the negative connecting end with a high-voltage fastener connected with the copper bar in a penetrating manner.
According to the technical scheme, the high-voltage assembly applied to the fuel cell provided by the invention comprises two galvanic piles, the high-voltage assembly comprises two high-voltage output parts and three copper bars, wherein: two high-voltage output portion all include the high-voltage terminal of electricity connection and connect the copper bar, and three copper bar is used for establishing ties the output pole of two galvanic piles and forms positive link and negative link, and positive link and negative link are connected with the copper bar of being connected of two high-voltage output portion respectively. On one hand, the invention can realize the integration of two galvanic piles, and can realize the power output of a high-power galvanic pile for performing power boost through two small-power galvanic piles, in particular to the power boost of a mirror-symmetrical medium-small power galvanic pile. On the other hand, during the assembly, can be with high-pressure output portion in advance with the last box connection of fuel cell casing, three copper bar is also connected and is set up on the galvanic pile that corresponds, high-pressure output portion is relatively independent with the equipment of three copper bar is fixed, each other does not influence, and before last box and lower box lock are connected, operating space is abundant, only need after last box and lower box lock connect the high voltage terminal of the high-pressure output portion that corresponds respectively with positive link and negative link can, high-pressure component's simple structure, and high-pressure component's connection assembly process is simple and convenient.
The invention also provides a fuel cell, which comprises a shell, two galvanic piles and the high-voltage component, and the fuel cell naturally has all the beneficial effects due to the adoption of the high-voltage component, so that on one hand, the integration of the two galvanic piles is realized, and the technical effect of power improvement is realized, on the other hand, the high-voltage output part is respectively fixed on the upper box body and the three copper bars are arranged on the galvanic piles just before the upper box body and the lower box body are packaged, the butt joint part of the anode connecting end/the cathode connecting end and the connecting copper bars is just exposed in the mounting hole, and the connection and the fixation of the high-voltage component can be completed by a worker through the mounting hole, thereby solving the technical problems that the assembly of the high-voltage component is inconvenient and the arrangement of the high-voltage component is not facilitated.
Drawings
Fig. 1 is an overall schematic view of a high-voltage assembly applied to a fuel cell provided in embodiment 1 of the present invention;
FIG. 2 is a side view of FIG. 1;
fig. 3 is a schematic perspective view of a connecting copper bar of the high voltage output part in fig. 1;
FIG. 4 is another schematic view of the connecting copper bar in FIG. 3;
fig. 5 is a schematic perspective view of the first copper bar in fig. 1;
fig. 6 is another schematic view of the first copper bar in fig. 5;
fig. 7 is a schematic perspective view of a second copper bar in fig. 1;
fig. 8 is another schematic view of the second copper bar in fig. 7;
fig. 9 is a schematic perspective view of a third copper bar in fig. 1;
fig. 10 is another schematic view of the third copper bar in fig. 9;
fig. 11 is an overall plan view of a fuel cell provided in example 2 of the invention;
FIG. 12 is a sectional view taken along line A-A of FIG. 11;
FIG. 13 is a cross-sectional view taken along line B-B of FIG. 11;
FIG. 14 is a perspective view of the guide frame of FIG. 13;
fig. 15 is a schematic view of the insulating plate and the three copper bars in fig. 11;
FIG. 16 is another schematic view of FIG. 15;
FIG. 17 is a schematic view of the first insulating plate of FIG. 15;
fig. 18 is a schematic view of the second insulating plate of fig. 15.
Reference numerals: 1-a high-voltage output part, 11-a high-voltage terminal, 12-a connecting copper bar and 13-a bending part; 2-copper bar, 21-first copper bar, 22-second copper bar, 23-third copper bar, 24-soft bar section, 25-hard bar section, 26-concave part, 27-mounting hole, 28-connecting hole, 29-nut; 3-an insulating support; 4-shell, 41-upper box body, 42-second assembly hole; 5-galvanic pile, 51-current collecting plate; 6-insulating plate, 61-first insulating plate, 62-second insulating plate, 63-first assembly hole, 64-fabrication hole; 7-guide plate, 71-limit groove, 72-projection.
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 number of individual cells connected in series by a single stack is limited, because when stacking, once a certain number is exceeded, the following problems arise: 1) the air distribution is uneven, so that the last batteries are not fully utilized; 2) the single battery is inconsistent, so that the voltage deviation of the single battery is overlarge; 3) uneven heat dissipation results in overheating of the middle single cell. Meanwhile, the space of the fuel cell is small, and the high-voltage design in the fuel cell needs to fully consider the checking of the electrical clearance and the creepage distance and the related insulation design. How to boost the output power of the fuel cell and ensure stable output of the internal high voltage is one of the key points of the current research.
In order to achieve the purpose of improving the power of a fuel cell, simultaneously optimizing the internal high-voltage design and simplifying the assembly process on the premise of meeting the electrical safety requirement of a stack, the invention provides a high-voltage component applied to the fuel cell and the fuel cell, and the content of the invention is explained in detail by two specific embodiments:
example 1
The embodiment of the invention provides a high-voltage component applied to a fuel cell, wherein the fuel cell comprises two galvanic piles, the high-voltage component comprises two high-voltage output parts 1 and three copper bars 2, and the high-voltage component comprises: two high voltage output portion 1 all include the high voltage terminal 11 of electricity connection and connect copper bar 12, and three copper bar 2 is used for establishing ties the output of two galvanic piles extremely and forms positive link and negative link, and positive link and negative link are connected with the copper bar 12 of being connected of two high voltage output portion 1 respectively. On one hand, the invention can realize the integration of two galvanic piles, and can realize the power output of a high-power galvanic pile for performing power boost through two small-power galvanic piles, in particular to the power boost of a mirror-symmetrical medium-small power galvanic pile. On the other hand, during the assembly, can be connected high-voltage output portion 1 with the last box of fuel cell casing in advance, three copper bar 2 is also connected and is set up on the galvanic pile that corresponds, high-voltage output portion 1 is fixed relatively independent with the equipment of three copper bar 2, each other does not influence, and before last box and last box lock are connected, operating space is abundant, only need after last box and last box lock connect positive electrode connecting end and negative electrode connecting end respectively the high voltage terminal 11 of corresponding high-voltage output portion 1 can, high-voltage component's simple structure, and high-voltage component's connection assembly process is simple and convenient.
In this embodiment, the three copper bars 2 are respectively a first copper bar 21, a second copper bar 22 and a third copper bar 23; one end of the first copper bar 21 is used for connecting the positive output electrode of one of the galvanic piles, and the other end of the first copper bar forms a positive electrode connecting end; one end of the second copper bar 22 is used for connecting the negative output electrode of the other galvanic pile, and the other end forms a positive electrode connecting end; two ends of the third copper bar 23 are respectively connected with the other positive output electrode and the other negative output electrode of the two galvanic piles; the positive connecting end and the negative connecting end are respectively connected with the two connecting copper bars 12 through high-voltage fasteners.
In order to facilitate the connection and fixation of the connecting copper bar 12 and the first copper bar 21/the second copper bar 22, in this embodiment, preferably, the connecting copper bar 12 is located above the first copper bar 21/the second copper bar 22, a connecting hole 28 is formed in the first copper bar 21/the second copper bar 22, and a nut 29 correspondingly matched with the connecting hole 28 is arranged on one side of the first copper bar 21/the second copper bar 22 away from the corresponding connecting copper bar 12, so as to increase the connection length of the high-voltage fastener, and the nut 29 can be connected with the corresponding copper bar 2 through a riveting process.
In order to ensure the stable connection of the copper bar 2 and the current collector of the pile, in the embodiment, the end of the output electrode of the pile, which is used for connecting the three copper bars 2, is provided with at least two mounting holes 27, a connecting piece is arranged in the mounting holes 27, the three copper bars 2 are equally fixed with the output electrode of the pile through the connecting piece, compared with the scheme that the current collector and the high-voltage copper bar 2 are usually connected by one bolt in the prior art, the problems of electric arcs or electric sparks caused by looseness, rotation and the like generated between the current collector and the high-voltage copper bar 2 in the random vibration process of the fuel cell are avoided, and the electric safety is improved.
In consideration of the phenomena of material deterioration and stress relaxation of the seal ring, thermal expansion and contraction due to environmental influences on the unit cell, and the like, the fuel cell stack generally has a structure such as a disc spring, a coil spring, and the like on an end plate on an end side, and there is a possibility that the relative position of the collector plates at both ends of the fuel cell stack may change. On the other hand, because the fuel cell stack has many kinds of components, the number of the single cells is large, usually more than 100, and the number of the single cells is gradually increased along with the improvement of the power requirement of the whole vehicle, a fuel cell stack formed by 300 single cells has appeared at present, the structural consistency of the single cells gradually becomes a key factor influencing the product consistency of the fuel cell stack, and the size of the fuel cell stack in the stacking direction has a certain deviation. For the above two reasons, a high-voltage design inside a fuel cell stack needs to have a certain fault tolerance.
In the existing design, the parts related to high-voltage safety inside the fuel cell stack shell are generally composed of an insulating plate, a current collecting plate, a high-voltage copper bar 2, a high-voltage output terminal, a copper bar 2 fastening part and the like. However, the high-voltage copper bar 2 is usually composed of hard copper bars 2, and the fault-tolerant requirement cannot be met. In order to ensure that the copper bar 2 is fixedly connected and the high-voltage component has fault-tolerant capability, in this embodiment, the first copper bar 21 and the second copper bar 22 each include more than 1 soft row segment 24 and more than 2 hard row segments 25, the soft row segments 24 and the hard row segments 25 are alternately distributed, and both ends of the first copper bar 21 and the second copper bar 22 are the hard row segments 25. In a preferred embodiment, the soft row section 24 is formed by stacking a plurality of copper foils.
Because the internal space of the fuel cell is limited, in order to satisfy the requirements of both the electrical clearance and the creepage distance in the effective space, in this embodiment, at least 1 soft row section 24 is of a bending structure, so that the two ends of the first copper bar 21/the second copper bar 22 where the bending structure is located are located on two different planes. The planes of the two ends of the first copper bar 21/the second copper bar 22 are not particularly limited, and may have a certain included angle as long as the design of other structures is not disturbed, preferably, the two planes of the two ends of the first copper bar 21/the second copper bar 22 are parallel to each other, i.e. form climbing sections, and the heights in the shell are different.
After the position of the high-voltage terminal 11 is designed and determined, the position of the second copper bar 22 is also fixed, and if the third copper bar 23 is far away from the second copper bar 22, the insulation between the second copper bar 22 and the third copper bar 23 can be not considered at this time. Because the inner space of the shell is limited, in this embodiment, the interval between the third copper bar 23 and the second copper bar 22 is smaller, the third copper bar 23 is provided with the insulating support 3, two ends of the insulating support 3 are respectively connected with the second copper bar 22 and the third copper bar 23, the plane where the part of the second copper bar 22 for connecting the insulating support 3 is located is parallel to the plane where the part of the third copper bar 23 for connecting the insulating support 3 is located, that is, the second copper bar 22 and the third copper bar 23 have a certain height difference at the insulating support 3; the axis of the insulating support 3, the plane where the third copper bar 23 is located and the plane where the second copper bar 22 is located are both arranged at an angle, and the soft row section 24 of the second copper bar 22 and the first copper bar 21 are distributed on two sides of the insulating support 3. The insulating support 3 can also play a supporting or lifting role at the same time.
In order to make the third copper bar 23 have the concave portion 26, the insulating support 3 is disposed in the concave portion 26, the forming manner of the concave portion 26 is not specifically limited in this embodiment, a groove may be formed in the third copper bar 23, and the third copper bar 23 may also be bent.
In order to ensure the connection and fixation among the second copper bar 22, the insulating support 3 and the third copper bar 23, in the embodiment, preferably, the connecting copper bar 12 is located above the first copper bar 21/the second copper bar 22, the first copper bar 21/the second copper bar 22 is provided with a connecting hole 28, the first copper bar 21/the second copper bar 22 relatively close to the upper box body is provided with a nut 29 correspondingly matched with the connecting hole 28, and the nut 29 is preferably arranged on one side close to the upper box body to thicken the connection length of the high-voltage fastener.
Also in order to take into account the electrical clearance and the creepage distance, as a preferred embodiment, the connecting copper bar 12 has a bent portion 13, so that two ends of the connecting copper bar 12 are located on two different planes, and preferably two parallel planes.
As an alternative, in the present embodiment, the shapes of the first copper bar 21, the second copper bar 22, and the third copper bar 23 and the position layout of the high voltage output portion 1 are not specifically limited, and the first copper bar 21 and the second copper bar 22 both include 1 soft bar segment 24 and 2 hard bars; the first copper bar 21 is U-shaped, and the soft bar section 24 of the first copper bar 21 is provided with a bending part; the soft row section 24 of the second copper bar 22 is provided with three bending parts, the second copper bar 22 is L-shaped, the short edge of the second copper bar is connected with the cathode of the galvanic pile, and the long edge of the second copper bar is connected with the copper bar 12; the third copper bar 23 is T-shaped, the transverse edge of the third copper bar 23 is connected with two galvanic piles in series, and the vertical edge is recessed downwards relative to the transverse edge to form a recessed portion 26.
The material of the first copper bar 21, the second copper bar 22 and the third copper bar 23 is not limited, and is preferably red copper T2.
Example 2
Based on the same inventive concept, the embodiment of the invention also provides a fuel cell, which comprises a shell 4, two electric stacks 5 and the high-voltage component provided by the embodiment 1; the shell 4 comprises an upper box body and an upper box body 41, and the upper box body 41 surround to form an installation cavity; the two electric piles 5 are arranged in the installation cavity, and output electrodes of the two electric piles 5 are arranged in series; two 1 intervals of high-voltage output portion set up on last box, and the output pole of two galvanic piles is established ties through three copper bar, specifically the same with embodiment 1: the three copper bars 2 connect the output electrodes of the two galvanic piles 5 in series and form an anode connecting end and a cathode connecting end, the anode connecting end and the cathode connecting end are respectively connected with the connecting copper bars 12 of the two high-voltage output parts 1, namely the copper bars 2 electrically connect the current collecting plates 51 of the two galvanic piles 5 in series.
In order to realize the insulation between the shell 4 and the copper bars 2, in this embodiment, the high-voltage assembly further includes an insulating plate 6, and the shell 4 and the three copper bars 2 are distributed on two sides of the insulating plate 6; two first assembling holes 63 are arranged on the insulating plate at intervals, and the two high-voltage terminals 11 are respectively arranged in the first assembling holes 63 in a penetrating manner; meanwhile, the upper case 41 is provided with a second assembly hole 42, a high-voltage fastener for connecting the positive/negative connection end and the connection copper bar 12 is inserted into the second assembly hole 42, and the insulating plate 6 is provided with a fabrication hole 64 corresponding to the second assembly hole 42 of the housing 4.
This embodiment leads to the fuel cell who provides owing to adopt foretell high-pressure subassembly, this fuel cell has foretell all beneficial effects naturally, realize the integration of two galvanic piles 5 on the one hand, realize the technological effect of power promotion, on the other hand only needs last box and last box 41 encapsulation before, fixed high-pressure output portion 1 on last box respectively, set up three copper bar 2 on galvanic pile 5, positive pole link/negative pole link just exposes in second pilot hole 42 with the connecting hole 28 of being connected copper bar 12, the staff can accomplish the connection of high-pressure subassembly through this second pilot hole 42 and fix, inconvenient high-pressure subassembly equipment has been solved, be unfavorable for the technical problem that high-pressure subassembly arranged.
In this embodiment, the series connection mode of the electric pile 5 is not particularly limited, and in order to avoid high-low voltage interleaving, "positive and negative" or "negative positive and negative positive" is preferable. Two galvanic piles 5 are arranged side by side and are located on the same plane, a central manifold for distributing gas is further arranged between the two galvanic piles 5, and the gas inlet end plates of the two galvanic piles 5 are fixed on the upper box body 41, so that the possibility of position deviation of the blind end plate exists. In the embodiment, the third copper bar 23 is connected with the air inlet collecting plates of the two galvanic piles 5 close to the central manifold, the first copper bar 21 is positioned on the galvanic pile 5 provided with the high-voltage output part 1, and the high-voltage output part 1 is arranged close to the blind end collecting plate of the galvanic pile 5; the soft row section 24 of the first copper row 21 is positioned between the two current collecting plates of the galvanic pile 5; one end of the second copper bar 22 is positioned on the blind end collector plate of the galvanic pile 5 which is not provided with the high-voltage output part 1, the other end is positioned above the galvanic pile 5 which is provided with the high-voltage output part 1, and the third copper bar 23 is connected with the middle section of the second copper bar 22 through an insulating structure.
In order to ensure accurate positioning of installation, in this embodiment, the high-voltage assembly further includes a guide plate 7, the guide plate 7 is connected with the insulating plate 6, and the guide plate 7 has 2 spacing grooves 71 for guiding and arranged at intervals; 2 connect copper bar 12 and press from both sides and locate between deflector 7 and insulation board 6, and 2 connect copper bar 12 and be located spacing groove 71 respectively.
In order to assist in supporting the high-voltage terminal 11, in this embodiment, the guide plate 7 is a cross structure, and includes a cross frame and a vertical frame, wherein 2 limiting grooves 71 are located on two sides of the cross frame, and a protrusion 72 for supporting the insulating plate 6 is disposed on the vertical frame.
In order to match the bent structure of the connecting copper bar 12, in the present embodiment, the insulating plate 6 includes a first insulating plate 61 and a second insulating plate 62 respectively connected to the upper box 41, and the first insulating plate 61 and the second insulating plate 62 have a height difference and are preferably parallel to each other. First fitting holes 63 for mounting the two high voltage terminals 11 are provided on the first insulating plate 61, and process holes 64 corresponding to the second fitting holes 42 on the housing 4 are provided on the second insulating plate 62, and the second insulating plate 62 is connected to the guide plate 7. The material of the insulating plate 6 in the present invention is not particularly limited, and is preferably an epoxy resin hard laminate material.
Through the embodiment, the invention has the following beneficial effects or advantages:
1) the invention can realize high-power electric pile power output for power promotion through two small-power electric piles, and particularly aims at power promotion of mirror-symmetrical medium and small-power electric piles.
2) The invention can solve the difficulty of considering electrical clearance, creepage distance and electrical safety requirements in the process of galvanic pile integration, thereby improving the electrical safety of galvanic pile integration.
3) According to the invention, through the design of the insulating plate and the copper bar fixing plate, the design of the combination of the hard row section and the soft row section and the design of double-hole fixing, the high-voltage design fault-tolerant requirement of the fuel cell stack in the stack integration process can be better met, the relative positions of the current collecting plates at two ends of the fuel cell stack are allowed to change in the actual operation process, the size of the fuel cell stack in the stacking direction has certain deviation in the operation process, and the risk that the fuel cell stack cannot be assembled is reduced.
4) The invention can solve the problems that the fixing looseness, rotation and the like between the current collecting plate and the high-voltage copper bar are possibly caused in the random vibration process of the fuel cell stack, and the electrical safety is improved.
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 high voltage assembly for use in a fuel cell, the fuel cell comprising two stacks, wherein the high voltage assembly comprises two high voltage outputs and three copper bars, wherein: two high-voltage output portion all include the high-voltage terminal of electricity connection and connect the copper bar, and is three the copper bar is used for establishing ties two the output of pile extremely forms positive link and negative pole link, positive link with the negative pole link respectively with two high-voltage output portion's connection copper bar is connected.
2. The high voltage assembly of claim 1, wherein three of said copper bars are a first copper bar, a second copper bar, and a third copper bar, respectively; one end of the first copper bar is used for being connected with the positive output electrode of one of the galvanic piles, and the other end of the first copper bar forms the positive electrode connecting end; one end of the second copper bar is used for being connected with the negative output electrode of the other galvanic pile, and the other end of the second copper bar forms the negative electrode connecting end; two ends of the third copper bar are respectively connected with the other positive output electrode and the other negative output electrode of the two galvanic piles; the positive connecting end and the negative connecting end are respectively connected with the two connecting copper bars through high-voltage fasteners.
3. The high voltage assembly of claim 2, wherein the first copper bar and the second copper bar each comprise more than 1 soft row segment and more than 2 hard row segments, the soft row segments and the hard row segments are alternately distributed, and both ends of the first copper bar and the second copper bar are hard row segments.
4. The high voltage assembly as claimed in claim 3, wherein at least 1 of said flexible row segments is a bent structure, such that two ends of said first/second copper row where said bent structure is located are located on two different planes.
5. The high-voltage assembly according to claim 2, wherein an insulating support is arranged on the third copper bar, two ends of the insulating support are respectively connected with the second copper bar and the third copper bar, and the axis of the insulating support is arranged at an angle with respect to the plane of the third copper bar and the plane of the second copper bar; the soft row section of the second copper bar and the first copper bar are distributed on two sides of the insulating support.
6. The high voltage assembly of claim 5, wherein the third copper bar has a recess, the insulator bracket being disposed in the recess.
7. The high voltage assembly as claimed in any one of claims 1 to 6, wherein said connecting copper bar has bent portions so that both ends of said connecting copper bar are located on two different planes.
8. The high-voltage assembly as claimed in any one of claims 1 to 6, wherein the ends of three copper bars for connecting the output poles of the stack are provided with at least two mounting holes, and connectors are arranged in the mounting holes, and the three copper bars are respectively fixed with the output poles of the stack through the connectors.
9. A fuel cell comprising a housing, two stacks, and the high voltage assembly of any one of claims 1-8; the shell comprises an upper box body and an upper box body, and the upper box body and the lower box body surround to form an installation cavity; the two electric piles are arranged in the mounting cavity, and output electrodes of the two electric piles are arranged in series; the two high-voltage output parts are arranged on the upper box body at intervals, and the output electrodes of the two galvanic piles are connected in series through the three copper bars.
10. The fuel cell of claim 9, wherein the high voltage assembly further comprises an insulating plate, the housing and the three copper bars being distributed on both sides of the insulating plate;
two first assembling holes are formed in the insulating plate at intervals, and the two high-voltage terminals are respectively arranged in the first assembling holes in a penetrating mode;
and a second assembly hole is formed in the upper box body and used for connecting the positive connecting end/the negative connecting end with a high-voltage fastener connected with the copper bar in a penetrating manner.
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| CN202111173444.1A CN114464864B (en) | 2021-10-08 | 2021-10-08 | High-voltage assembly applied to fuel cell and fuel cell |
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| CN202111173444.1A CN114464864B (en) | 2021-10-08 | 2021-10-08 | High-voltage assembly applied to fuel cell and fuel cell |
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| CN114464864B CN114464864B (en) | 2024-06-21 |
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| CN114464864B (en) | 2024-06-21 |
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