CN111900430B - Insulation board and galvanic pile - Google Patents
Insulation board and galvanic pile Download PDFInfo
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- CN111900430B CN111900430B CN202010698658.XA CN202010698658A CN111900430B CN 111900430 B CN111900430 B CN 111900430B CN 202010698658 A CN202010698658 A CN 202010698658A CN 111900430 B CN111900430 B CN 111900430B
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- insulating plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
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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
- H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
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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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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses an insulating plate and an electric pile, and belongs to the technical field of fuel cells. The insulating plate comprises an insulating plate body, a cooling liquid inlet assembly, a cooling liquid outlet assembly and a gas material inlet and outlet assembly, wherein an insulating plate cooling cavity is arranged on the insulating plate body and used for cooling a collector plate arranged in the insulating plate cooling cavity, and the insulating plate cooling cavity is communicated with the cell stack cooling cavity; the cooling liquid inlet assembly and the cooling liquid outlet assembly can be detachably connected to the insulating plate body, cooling liquid can enter the insulating plate cooling cavity and the cell stack cooling cavity through the cooling liquid inlet assembly, and the cooling liquid in the insulating plate cooling cavity and the cell stack cooling cavity can be discharged through the cooling liquid outlet assembly; the gas material inlet and outlet assembly is detachably connected to the insulating plate body, gas materials can enter and exit the gas cavity of the cell stack through the gas material inlet and outlet assembly, the risk of end plate corrosion can be reduced, and the temperature of the collector plate can be reduced, so that the performance of the first section battery and the tail section battery of the cell stack is ensured.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to an insulating plate and an electric pile.
Background
The proton exchange membrane fuel cell stack comprises an end plate, an insulating plate, a collector plate, a cell stack, a material inlet and outlet interface and an inspection terminal, wherein the cell stack generally comprises a plurality of single cells, each single cell comprises a bipolar plate and a membrane electrode, the cell stack comprises a cell stack cooling cavity and a cell stack gas cavity for gas material circulation, the cell stack gas cavity comprises an air cavity and a hydrogen cavity for circulating air and hydrogen respectively, the material inlet and outlet interface is generally connected to the end plate, the inspection terminal is connected to the bipolar plate, a load is connected to the collector plate, and the collector plate is a part for conveying electric energy generated by the fuel cell to the load.
When the current collecting plate of the traditional fuel cell outputs current, the resistance and contact resistance of the material of the current collecting plate can generate electric heat due to large current, so that the temperature of the current collecting plate is increased, and the temperature can influence the performance of a first cell and a tail cell of a stack; in addition, the material inlet and outlet interfaces are also called manifolds, the manifolds are connected with end plates, the fuel cell material inlet and outlet galvanic pile need to be in contact with the end plates, and the end plates are in direct contact with the material, so that the hidden trouble of end plate corrosion exists.
Therefore, there is a need for an insulating plate and a stack capable of reducing the corrosion risk of the end plate and cooling the current collecting plate to solve the above-mentioned technical problems in the prior art.
Disclosure of Invention
The invention aims to provide an insulating plate and a galvanic pile, which can reduce the risk of end plate corrosion and can cool a current collecting plate, thereby ensuring the performance of a first section battery and a tail section battery of the galvanic pile.
In order to achieve the purpose, the invention adopts the following technical scheme:
an insulation board for use in a galvanic stack, the galvanic stack includes a cell stack and a current collecting plate, the current collecting plate set up in both ends or one end of the cell stack, the insulation board set up in keeping away from of current collecting plate the one end of cell stack, the cell stack includes a cell stack cooling chamber and a cell stack gas chamber, the insulation board includes:
the insulating plate cooling cavity is used for cooling the collector plate arranged in the insulating plate cooling cavity and communicated with the cell stack cooling cavity;
the cooling liquid inlet assembly and the cooling liquid outlet assembly are detachably connected to the insulation plate body, cooling liquid can enter the insulation plate cooling cavity and the cell stack cooling cavity through the cooling liquid inlet assembly, and the cooling liquid in the insulation plate cooling cavity and the cell stack cooling cavity can be discharged through the cooling liquid outlet assembly;
and the gas material inlet and outlet assembly is detachably connected to the insulating plate body, and gas materials can enter and exit the gas cavity of the cell stack through the gas material inlet and outlet assembly.
As a preferred technical scheme of the insulating plate, a cooling liquid inlet sinking port is formed in the insulating plate body and is communicated with the insulating plate cooling cavity and the cell stack cooling cavity; and a cooling liquid outlet sinking port is formed in the insulating plate body and is communicated with the insulating plate cooling cavity and the cell stack cooling cavity.
As a preferred technical scheme of the insulating plate, a cooling liquid inlet through hole is formed in the insulating plate body, the cooling liquid inlet assembly comprises a cooling liquid inlet manifold, and the cooling liquid inlet manifold is detachably connected to the cooling liquid inlet through hole; the insulation board body is provided with a cooling liquid outlet through hole, the cooling liquid outlet assembly comprises a cooling liquid outlet manifold, and the cooling liquid outlet manifold is detachably connected to the cooling liquid outlet through hole.
As a preferred technical scheme of the insulating plate, the gas material inlet and outlet assembly comprises a hydrogen inlet and outlet assembly and an air inlet and outlet assembly, the hydrogen inlet and outlet assembly is hermetically connected with a hydrogen cavity of the cell stack gas cavity, and the air inlet and outlet assembly is hermetically connected with an air cavity of the cell stack gas cavity.
As a preferred technical scheme of the insulating plate, the hydrogen inlet and outlet assembly comprises a hydrogen inlet and outlet through hole group and a hydrogen manifold group which are both arranged on the insulating plate body, the hydrogen manifold group is arranged on the hydrogen inlet and outlet through hole group, and hydrogen can enter and exit the hydrogen cavity through the hydrogen manifold group and the hydrogen inlet and outlet through hole group.
As a preferred technical scheme of the insulation board, the air inlet and outlet assembly comprises an air inlet and outlet through hole group and an air manifold group which are both arranged on the insulation board body, the air manifold group is arranged on the air inlet and outlet through hole group, and air can enter and exit the air cavity through the air manifold group and the air inlet and outlet through hole group.
In order to achieve the above object, the present invention further provides an electric stack, which includes a first end plate, a current collecting plate, a cell stack, a second end plate, and the insulating plate as described above, wherein the first end plate, the insulating plate, the current collecting plate, the cell stack, the current collecting plate, the insulating plate, and the second end plate are stacked and assembled in this order.
As a preferred technical scheme of the galvanic pile, the galvanic pile is characterized in that the insulating plate is manufactured by adopting an integrated manufacturing process.
As a preferred technical solution of the stack, the stack further includes a buffer laminate disposed on an end surface of the first end plate far away from the cell stack or an end surface of the second end plate far away from the cell stack.
As a preferred technical scheme of the galvanic pile, the galvanic pile further comprises an elastic component and a third end plate, wherein one end of the elastic component abuts against the end face of the first end plate far away from the cell pile or the end face of the second end plate far away from the cell pile, and the other end of the elastic component abuts against the end face of the third end plate.
The invention provides an insulating plate and a galvanic pile, wherein the galvanic pile comprises a first end plate, a current collecting plate, a cell pile, a second end plate and an insulating plate, the insulating plate comprises an insulating plate body, an insulating plate cooling cavity is arranged on the insulating plate body, the current collecting plate is arranged in the insulating plate cooling cavity, and cooling liquid is circulated in the insulating plate cooling cavity so as to achieve the purpose of cooling the current collecting plate, so that the performances of a first section of cell and a last section of cell which are in contact with the current collecting plate in the galvanic pile are ensured; connect all detachably on the insulation board body with coolant liquid import subassembly and coolant liquid export subassembly, the coolant liquid passes through coolant liquid import subassembly and coolant liquid export subassembly business turn over insulation board cooling chamber and battery pile cooling chamber, gas material import and export subassembly can be dismantled and connect on the insulation board body, because the battery pile both ends all are provided with the insulation board, but set up gas material import and export subassembly on the insulation board body of one of them insulation board at least, coolant liquid import subassembly and coolant liquid export subassembly, just can realize gas material business turn over battery pile gas chamber, and avoided the coolant liquid from end plate business turn over battery pile cooling chamber and gas material business turn over battery pile gas chamber from the end plate, the risk of end plate corruption has been reduced.
Drawings
FIG. 1 is a schematic view of a first perspective of a first insulating panel according to an embodiment of the present invention;
FIG. 2 is a schematic structural view from a second perspective of a first insulating panel according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a second insulating plate according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a third insulating panel according to an embodiment of the present invention;
fig. 5 is an exploded view of a first stack according to an embodiment of the present invention;
fig. 6 is an exploded view of a second type of stack according to an embodiment of the present invention.
Reference numerals are as follows:
1. an insulating plate body; 2. an insulating plate cooling cavity; 3. a cooling liquid inlet is sunk; 4. a cooling liquid outlet sinking port; 5. a coolant inlet manifold; 6. a coolant outlet manifold; 7. a hydrogen manifold group; 71. a hydrogen inlet manifold; 72. a hydrogen outlet manifold; 8. an air manifold group; 81. an air inlet manifold; 82. an air outlet manifold; 9. hydrogen gas inlet and outlet through hole groups; 91. a hydrogen inlet through hole; 92. a hydrogen outlet through hole; 10. an air inlet and outlet through hole group; 101. an air inlet through hole; 102. an air outlet through hole; 11. a coolant inlet through hole; 12. a coolant outlet through hole;
100. a first end plate; 200. a collector plate; 2001. a lead-out terminal; 300. a cell stack; 400. a second end plate; 500. an insulating plate; 600. buffering the laminate; 700. an elastic component; 800. a third end plate.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 to 4, the present embodiment provides an insulating plate 500, which is used in a stack, where the stack includes a cell stack and a current collecting plate, the current collecting plate is disposed at two ends or one end of the cell stack, the insulating plate 500 is disposed at one end of the current collecting plate away from the cell stack, the cell stack includes a stack cooling cavity and a stack gas cavity, the insulating plate 500 includes an insulating plate body 1, a cooling liquid inlet assembly, a cooling liquid outlet assembly, and a gas material inlet and outlet assembly, where the insulating plate body 1 is provided with an insulating plate cooling cavity 2, the insulating plate cooling cavity 2 is used for cooling the current collecting plate disposed in the insulating plate cooling cavity 2, and the insulating plate cooling cavity 2 is communicated with the stack cooling cavity; the cooling liquid inlet assembly and the cooling liquid outlet assembly can be detachably connected to the insulating plate body 1, cooling liquid can enter the insulating plate cooling cavity 2 and the cell stack cooling cavity through the cooling liquid inlet assembly, and cooling liquid in the insulating plate cooling cavity 2 and the cell stack cooling cavity can be discharged through the cooling liquid outlet assembly; the gas material inlet and outlet assembly is detachably connected to the insulating plate body 1, and gas materials can enter and exit the gas cavity of the cell stack through the gas material inlet and outlet assembly.
The insulation board 500 comprises an insulation board body 1, an insulation board cooling cavity 2 is arranged on the insulation board body 1, a collector is arranged in the insulation board cooling cavity 2, and cooling liquid is circulated in the insulation board cooling cavity 2 so as to achieve the purpose of cooling the collector, so that the performance of a first battery and a tail battery which are contacted with the collector in a stack is ensured; connect all detachably on insulation board body 1 with coolant liquid import subassembly and coolant liquid export subassembly, the coolant liquid passes through coolant liquid import subassembly and coolant liquid export subassembly business turn over insulation board cooling chamber 2 and battery pile cooling chamber, gas material imports and exports the subassembly and can dismantle and connect on insulation board body 1, because the battery pile both ends all are provided with insulation board 500, but set up gas material import and export subassembly on insulation board body 1 of one of them insulation board 500 at least, coolant liquid import subassembly and coolant liquid export subassembly, just can realize gas material business turn over battery pile gas chamber, and avoided the coolant liquid from end plate business turn over battery pile cooling chamber and gas material business turn over battery pile gas chamber from the end plate, the risk of end plate corruption has been reduced.
Optionally, based on the coolant flow pattern of the cell stack and the gas material flow pattern in the conventional stack, the insulating plate 500 provided in this embodiment has two forms, namely a gas port insulating plate and a dead end insulating plate, and two types of insulating plates 500 are introduced:
insulating board of blind end: as shown in fig. 4, a cooling liquid inlet countersunk 3 is arranged on the insulating plate body 1, and the cooling liquid inlet countersunk 3 is communicated with the insulating plate cooling cavity 2 and the cell stack cooling cavity; be provided with the heavy mouthful 4 of coolant liquid export on the insulation board body 1, the heavy mouthful 4 of coolant liquid export communicates with insulation board cooling chamber 2 and battery pile cooling chamber, has realized the function of insulation board cooling chamber 2 and battery pile cooling chamber intercommunication to avoided providing the coolant liquid to insulation board cooling chamber 2 and battery pile cooling chamber alone, it is more convenient to operate, and the integrated level is higher.
Gas port insulation board: as shown in fig. 1 to 3, a cooling liquid inlet through hole 11 is formed in an insulating plate body 1, a cooling liquid inlet assembly includes a cooling liquid inlet manifold 5, and the cooling liquid inlet manifold 5 is detachably connected to the cooling liquid inlet through hole 11; be provided with coolant liquid outlet through hole 12 on the insulation board body 1, coolant liquid outlet subassembly includes coolant liquid outlet manifold 6, and coolant liquid outlet manifold 6 can be dismantled and connect on coolant liquid outlet through hole 12. When the cooling liquid needs to be added through the insulating plate 500, the insulating plate body 1 needs to be provided with the cooling liquid inlet through hole 11, the cooling liquid inlet manifold 5 is arranged on the cooling liquid inlet through hole 11 to be connected with an external cooling liquid adding device, so that the adding function of the cooling liquid is realized, the insulating plate body 1 is provided with the cooling liquid outlet through hole 12, and the cooling liquid outlet through hole 12 is provided with the cooling liquid outlet manifold 6, so that the discharging function of the cooling liquid is realized. In general, in a stack, insulating plates 500 are provided at both ends of the stack, and at least any one of the insulating plates 500 is a port insulating plate.
In a conventional stack, the collector plates are in contact with cell gases, and long-term corrosion of the cell gases (such as hydrogen and air) also has the potential to corrode the collector plates. Preferably, in this embodiment, the gas material inlet and outlet assembly includes a hydrogen inlet and outlet assembly and an air inlet and outlet assembly, the hydrogen inlet and outlet assembly is hermetically connected to the hydrogen chamber of the gas chamber of the cell stack, and the air inlet and outlet assembly is hermetically connected to the air chamber of the gas chamber of the cell stack, so that hydrogen and air cannot enter the contact region between the current collecting plate and the bipolar plate, that is, no gas enters the current collecting plate region, and the current collecting plate does not directly contact with the cell gas, thereby avoiding the oxidation corrosion of the current collecting plate.
The hydrogen inlet and outlet assembly comprises a hydrogen inlet and outlet through hole group 9 and a hydrogen manifold group 7 which are arranged on the insulating plate body 1, the hydrogen manifold group 7 is arranged on the hydrogen inlet and outlet through hole group 9, and hydrogen can enter and exit the hydrogen cavity through the hydrogen manifold group 7 and the hydrogen inlet and outlet through hole group 9. Specifically, the hydrogen inlet/outlet through hole group 9 includes a hydrogen inlet through hole 91 and a hydrogen outlet through hole 92, the hydrogen manifold group 7 includes a hydrogen inlet manifold 71 and a hydrogen outlet manifold 72, the hydrogen inlet manifold 71 and the hydrogen outlet manifold 72 are respectively disposed on the hydrogen inlet through hole 91 and the hydrogen outlet through hole 92, hydrogen enters the hydrogen chamber through the hydrogen inlet manifold 71 and the hydrogen inlet through hole 91, and is discharged from the hydrogen outlet through hole 92 and the hydrogen outlet manifold 72 after passing through the hydrogen chamber of the cell stack, thereby realizing the inlet and outlet of hydrogen.
The air inlet and outlet assembly comprises an air inlet and outlet through hole group 10 and an air manifold group 8 which are arranged on the insulation board body 1, the air manifold group 8 is arranged on the air inlet and outlet through hole group 10, and air can enter and exit the air cavity through the air manifold group 8 and the air inlet and outlet through hole group 10. Specifically, the air inlet and outlet through hole group 10 includes an air inlet through hole 101 and an air outlet through hole 102, the air manifold group 8 includes an air inlet manifold 81 and an air outlet manifold 82, the air inlet manifold 81 and the air outlet manifold 82 are respectively disposed on the air inlet through hole 101 and the air outlet through hole 102, air enters the air chamber through the air inlet manifold 81 and the air inlet through hole 101, passes through the air chamber, and is discharged from the air outlet through hole 102 and the air outlet manifold 82, thereby realizing the inlet and outlet of air.
It should be noted that the coolant inlet manifold 5, the coolant outlet manifold 6, the hydrogen manifold, the hydrogen inlet manifold 71, the hydrogen outlet manifold 72, the air inlet manifold 81, and the air outlet manifold 82, which are mentioned above, may be made of plastic, so as to avoid corrosion, thereby improving the service life of the insulating plate 500.
As shown in fig. 5 and 6, the present embodiment further provides an electric stack, which includes a first end plate 100, a current collecting plate 200, a cell stack 300, a second end plate 400, and the above-mentioned insulating plate 500, and the first end plate 100, the insulating plate 500, the current collecting plate 200, the cell stack 300, the current collecting plate 200, the insulating plate 500, and the second end plate 400 are stacked and assembled in this order. The collector plate 200 with the size matched with the insulating plate cooling cavity 2 is embedded in the insulating plate cooling cavity 2 and is overlapped with the cell stack 300, the first end plate 100 or the second end plate 400 is processed according to the shape of an external manifold of the insulating plate 500 and is buckled and pressed on the outer sides of the anode insulating plate 500 and the cathode insulating plate 500, and the cell stack 300 is fastened by a fastener.
Preferably, since the cell stack needs to add the gas material and the cooling liquid, for the convenience of processing, the gas material inlet/outlet assembly for adding the gas material and the cooling liquid inlet/outlet assembly for adding the cooling liquid are disposed on one insulating plate 500 at the same time, and in other embodiments, the gas material inlet/outlet assembly and the cooling liquid inlet/outlet assembly for adding the cooling liquid are not disposed on one insulating plate 500, and may be disposed on two insulating plates 500.
Specifically, the gas port insulating plate has upper and lower surfaces, the coolant inlet manifold 5, the coolant outlet manifold 6, the hydrogen manifold group 7 and the air manifold group 8 are arranged on one of the upper and lower surfaces of the gas port insulating plate, and the insulating plate cooling cavity 2 is arranged on the opposite surface, it should be noted that, because the collecting plate 200 needs to be embedded in the insulating plate cooling cavity 2, a collecting plate cavity with a certain thickness needs to be processed and embedded on the surface of the insulating plate cooling cavity 2 for placing the collecting plate 200; the dead end insulating plate only needs to be provided with the insulating plate cooling cavity 2 on one of the upper surface and the lower surface, and similarly, a collecting plate cavity with a certain thickness needs to be processed and embedded on the surface of the insulating plate cooling cavity 2 for placing the collecting plate 200. Preferably, in this embodiment, first end plate 100 is a port insulator plate and second end plate 400 is a blind end insulator plate. Alternatively, in other embodiments, the first end plate 100 and the second end plate 400 may both be port insulator plates. In the stack, at least one of the first end plate 100 and the second end plate 400 is a gas port insulating plate, i.e., capable of allowing the coolant and gas materials to enter and exit the stack cooling cavity and the stack gas cavity.
The assembly process of the galvanic pile is as follows: processing a first end plate 100 matched with the insulating plate 500, namely reserving a pore passage for a manifold to pass through on the first end plate 100, and processing a screw hole or a sliding groove for fastening on the periphery of the first end plate 100; and processing a second end plate 400 matched with the outer side of the insulating plate 500 of the manifold, and processing corresponding screw holes or sliding grooves for fastening on the periphery of the second end plate 400. The first end plate 100 and the second end plate 400 in this embodiment are only used for fastening and sealing the stack, and the first end plate 100 and the second end plate 400 apply the assembly force, which is transmitted through the insulation plate 500 and other stack components, to the cell stack 300, thereby ensuring the contact pressure equalization of the cell stack 300 in the stack.
Alternatively, the current collecting plate 200 is generally made of a metal material or a graphite material, but since the fuel cell generates the maximum direct current, in order to reduce the resistance, it is generally made of a copper plate having good conductivity, and in order to reduce the contact resistance between the current collecting plate 200 and the cell stack 300, the surface of the current collecting plate 200 is generally plated with a precious metal, such as gold or silver, which also improves the corrosion resistance of the current collecting plate 200. The insulating plate 500 is manufactured by adopting an integrated manufacturing process, compared with the conventional galvanic pile assembly, a galvanic pile manifold is manufactured independently, a pipe fitting and a flange need to be manufactured, a sealing element is required to be connected with the galvanic pile, the flange and the sealing element are reduced, and the sealing risk is also reduced.
Preferably, the shape of the current collecting plate 200 is consistent with the shape of the active area of the cell stack 300, the cooling cavity side of the insulating plate 500 is processed with a sealing surface to form a sealing pair with the cell stack sealing member, and the cell stack gas is sealed outside the current collecting plate 200; in particular, the leading terminal 2001 of the current collecting plate 200 is led out from the insulating plate cooling cavity 2, a corresponding groove shape is processed on the insulating plate 500, the leading terminal 2001 is sealed with the insulating plate cooling cavity 2, and the medium in the insulating plate cooling cavity 2 is sealed. Optionally, the leading terminal 2001 and the insulating plate cooling cavity 2 are sealed by a silicone gasket or other rubber gasket. In other embodiments, the shape of the current collecting plates 200 may be selected not to conform to the shape of the active area of the cell stack 300, and the area of the current collecting plates 200 may be increased or decreased according to actual needs.
Optionally, there are two processing schemes for the manifold on the insulating plate 500, as shown in fig. 2 and fig. 5, one scheme is to directly process a round pipe, in order to enhance the strength of the round pipe, a metal pipe is embedded in the round pipe, and the metal pipe is made of stainless steel material; as shown in fig. 3 and 6, another scheme is to provide a square cavity on the insulating plate 500 according to the shape of the common pipe of the cell stack, process a circular pipe on the side of the cavity, line a metal pipe in the circular pipe to improve the strength, and flexibly design the pipe diameter of the circular pipe by adopting the second scheme.
The stack further includes a buffer laminate 600, and the buffer laminate 600 is disposed on an end surface of the first end plate 100 remote from the cell stack 300 or an end surface of the second end plate 400 remote from the cell stack 300. The buffer layer plate 600 is mainly a combination of a rubber plate and a stainless steel plate, and can generate a proper elastic modulus to compensate the size deviation of the battery parts, so that the assembly force is uniformly distributed. Preferably, in the present embodiment, the buffer laminate 600 is disposed on the end surface of the second end plate 400 remote from the cell stack 300.
The stack further includes an elastic member 700 and a third end plate 800, wherein one end of the elastic member 700 abuts against the end surface of the first end plate 100 far away from the cell stack 300 or the end surface of the second end plate 400 far away from the cell stack 300, and the other end abuts against the end surface of the third end plate 800. Through the stress applied around the third end plate 800, the elastic component 700 reacts on the cell stack 300, so that the stress distribution of the cell stack 300 is more uniform, particularly, the reaction force of the elastic component 700 at the central part of the cell stack 300 can compensate and promote the static friction force between cell sealing devices or cell parts in the cell stack, so as to prevent the cells in the cell stack 300 from sliding, and the acting force can also keep the gravity center of the cell stack 300 stable, prevent the stacked cell sealing devices from deforming, thereby obtaining the cell stack with simple structure, part tolerance and low cost. Preferably, in this embodiment, the elastic member 700 is a disc spring.
The fastening points of the electric pile provided by the embodiment are arranged on the first end plate 100 and the second end plate 400, and the first end plate 100 and the second end plate 400 can be made of metal materials, so that the electric pile is high in strength, high in elastic modulus and fatigue-resistant, and is more reliable in fastening; the fastening force is uniformly transmitted to the stack structure by the first end plate 100 and the second end plate 400, and the elastic assembly 700 and the buffer laminate 600 compensate, so that the deviation caused by the processing precision is avoided, and the stack is not easy to deform; the insulating plate 500 integrates the functions of the insulating plate cooling cavity 2 and the manifold, so that the parts of the galvanic pile are reduced, and the current collecting plate 200 is embedded in the insulating plate 500, so that the assembly is simple, and the integration level of the galvanic pile is high; the processing precision requirement of the electric pile auxiliary part can be relaxed, and the processing cost is reduced. In addition, because of having avoided the contact of fluid with the auxiliary of electric pile such as end plate and fastener, reduced the risk of oxidative corrosion, expanded end plate and fastener electric pile auxiliary material selection, selectable light rigid material further lightens electric pile weight for the low in manufacturing cost of electric pile.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the present invention is limited to the details of the embodiment and the range of applications, which can be changed by those skilled in the art according to the spirit of the present invention.
Claims (9)
1. An insulation board for use in a galvanic pile, the galvanic pile comprises a cell stack and a current collecting plate, the current collecting plate is arranged at two ends or one end of the cell stack, the insulation board is arranged at one end of the current collecting plate away from the cell stack, the cell stack comprises a cell stack cooling cavity and a cell stack gas cavity, and the insulation board comprises:
the insulating plate cooling structure comprises an insulating plate body (1), wherein an insulating plate cooling cavity (2) is arranged on the insulating plate body (1), the insulating plate cooling cavity (2) is used for cooling a collector plate arranged in the insulating plate cooling cavity (2), and the insulating plate cooling cavity (2) is communicated with a cell stack cooling cavity;
the cooling liquid inlet assembly and the cooling liquid outlet assembly are detachably connected to the insulation plate body (1), cooling liquid can enter the insulation plate cooling cavity (2) and the cell stack cooling cavity through the cooling liquid inlet assembly, and the cooling liquid in the insulation plate cooling cavity (2) and the cell stack cooling cavity can be discharged through the cooling liquid outlet assembly;
the gas material inlet and outlet assembly is detachably connected to the insulating plate body (1), and gas materials can enter and exit the cell stack gas cavity through the gas material inlet and outlet assembly;
a cooling liquid inlet sinking port (3) is formed in the insulating plate body (1), and the cooling liquid inlet sinking port (3) is communicated with the insulating plate cooling cavity (2) and the cell stack cooling cavity; and a cooling liquid outlet sinking port (4) is formed in the insulating plate body (1), and the cooling liquid outlet sinking port (4) is communicated with the insulating plate cooling cavity (2) and the cell stack cooling cavity.
2. The insulating plate according to claim 1, characterized in that said insulating plate body (1) is provided with a cooling fluid inlet through hole (11), said cooling fluid inlet assembly comprising a cooling fluid inlet manifold (5), said cooling fluid inlet manifold (5) being removably connected to said cooling fluid inlet through hole (11); the insulation board body (1) is provided with a cooling liquid outlet through hole (12), the cooling liquid outlet assembly comprises a cooling liquid outlet manifold (6), and the cooling liquid outlet manifold (6) is detachably connected to the cooling liquid outlet through hole (12).
3. The insulating panel of claim 1, wherein the gas feed inlet and outlet assembly comprises a hydrogen inlet and outlet assembly and an air inlet and outlet assembly, the hydrogen inlet and outlet assembly being sealingly connected to the hydrogen chamber of the stack gas chamber, and the air inlet and outlet assembly being sealingly connected to the air chamber of the stack gas chamber.
4. The insulating plate according to claim 3, wherein the hydrogen inlet and outlet assembly comprises a hydrogen inlet and outlet through hole set (9) and a hydrogen manifold set (7) both arranged on the insulating plate body (1), the hydrogen manifold set (7) is arranged on the hydrogen inlet and outlet through hole set (9), and hydrogen can enter and exit the hydrogen chamber through the hydrogen manifold set (7) and the hydrogen inlet and outlet through hole set (9).
5. An insulating panel as claimed in claim 3, characterised in that the air inlet and outlet assembly comprises a set of air inlet and outlet holes (10) and a set of air manifolds (8) both provided on the insulating panel body (1), the set of air manifolds (8) being provided on the set of air inlet and outlet holes (10), air being able to enter and exit the air cavity through the set of air manifolds (8) and the set of air inlet and outlet holes (10).
6. An electric stack comprising a first end plate (100), a current collecting plate (200), a cell stack (300), a second end plate (400) and the insulating plate (500) according to any one of claims 1 to 5, wherein the first end plate (100), the insulating plate (500), the current collecting plate (200), the cell stack (300), the current collecting plate (200), the insulating plate (500) and the second end plate (400) are stacked and assembled in this order.
7. The stack according to claim 6, characterized in that said insulating plate (500) is made in an integrated manufacturing process.
8. The stack according to claim 6, further comprising a buffer laminate (600), the buffer laminate (600) being disposed on an end face of the first end plate (100) remote from the cell stack (300) or on an end face of the second end plate (400) remote from the cell stack (300).
9. The stack according to claim 6, further comprising an elastic member (700) and a third end plate (800), wherein one end of the elastic member (700) abuts against the end face of the first end plate (100) far away from the cell stack (300) or the end face of the second end plate (400) far away from the cell stack (300), and the other end abuts against the end face of the third end plate (800).
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| CN202010698658.XA CN111900430B (en) | 2020-07-20 | 2020-07-20 | Insulation board and galvanic pile |
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| CN202010698658.XA CN111900430B (en) | 2020-07-20 | 2020-07-20 | Insulation board and galvanic pile |
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| CN111900430B true CN111900430B (en) | 2022-09-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113555579A (en) * | 2021-07-27 | 2021-10-26 | 中汽创智科技有限公司 | Collector plate of fuel cell stack |
| CN114464837B (en) * | 2021-10-08 | 2024-01-16 | 东风汽车集团股份有限公司 | Fuel cell system and assembly process |
| CN114864977A (en) * | 2022-05-24 | 2022-08-05 | 上海骥翀氢能科技有限公司 | Fuel cell stack |
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