CN110718710A - Fuel cell stack and stacking method thereof - Google Patents
Fuel cell stack and stacking method thereof Download PDFInfo
- Publication number
- CN110718710A CN110718710A CN201810819309.1A CN201810819309A CN110718710A CN 110718710 A CN110718710 A CN 110718710A CN 201810819309 A CN201810819309 A CN 201810819309A CN 110718710 A CN110718710 A CN 110718710A
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- China
- Prior art keywords
- fuel cell
- cell stack
- end plate
- binding
- fastening
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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
- H01M8/2404—Processes or apparatus for grouping 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
- 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
- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention provides a fuel cell stack and a stacking method thereof, wherein the fuel cell stack comprises two end plates, at least one fuel cell unit and a group of binding pieces, wherein the fuel cell unit is stacked between the two end plates, the binding pieces are respectively bound on the outer sides of the two end plates along the stacking direction of the fuel cell unit, and the binding pieces are arranged to apply binding force to the end plates so as to ensure that the fuel cell unit is stacked between the two end plates.
Description
Technical Field
The present invention relates to a fuel cell, and more particularly, to a stacking method for a fuel cell stack.
Background
A fuel cell, such as a proton exchange membrane fuel cell, is a power generation device that directly converts chemical energy in fuel into electrical energy through an electrochemical reaction. However, a single fuel cell (or fuel cell) can provide a lower voltage and lower output power. In practical applications, a plurality of fuel cells are stacked together to form a fuel cell stack capable of providing high voltage and high power. Accordingly, since the fuel cell stack is formed by stacking a plurality of fuel cell cells together, the fuel cell cells each require good gas tightness. Therefore, the assembly or assemblage of the fuel cell stack has to be carefully designed to reduce the manufacturing cost thereof and to ensure the quality of the fuel cell to be stable.
Japanese patent application No. JP1999069590 discloses a fixing assembly capable of stacking a plurality of fuel cell units together to form a fuel cell stack, wherein the fixing assembly disclosed in this patent application fixes the entire fuel cell stack together by means of fixing screws inserted into separators of the fuel cell stack. However, the screw can only provide pressure to the fuel cell stack through the bolt thereon. Therefore, in order to ensure that the regions of the fuel cell stack are uniformly stressed and the fuel cell stack can be well fixed, the fuel cell stack has to be provided with a plurality of fixing screws which are uniformly distributed. In other words, the fixture screws of the fuel cell stack of this patent application have to occupy the portion of the plates that would otherwise be used to provide the flow fields. This inevitably leads to a large volume of the fuel cell stack and to an increase in the manufacturing cost of the fuel cell stack. In addition, since the polar plate and the separator of the fuel cell stack are provided with at least two through holes, the difficulty in processing and manufacturing the polar plate of the fuel cell stack is increased.
Disclosure of Invention
The main object of the present invention is to provide a fuel cell stack, wherein the fixing assembly of the fuel cell stack is configured to apply a force to the force-bearing surface of the end plate of the fuel cell stack to ensure that the fuel cell stack is fixed.
Another object of the present invention is to provide a fuel cell stack in which the elements of the fixing assembly providing the fixing action do not need to pass through the plates so as to avoid the fixing assembly from affecting the structure of the plates of the fuel cell stack.
It is another object of the present invention to provide a fuel cell stack in which a fixing assembly of the fuel cell stack is disposed outside the fuel cell stack, thereby greatly increasing the area in which the plates of the fuel cell stack can be used to provide flow fields. Accordingly, the fixing assembly of the present invention can significantly reduce the volume of the fuel cell stack and improve the power-to-volume ratio of the fuel cell stack.
Another object of the present invention is to provide a fuel cell stack, in which a fixing assembly of the fuel cell stack enables an assembly process of the fuel cell stack to be optimized and reduces manufacturing difficulty and manufacturing cost of the fuel cell stack.
Another object of the present invention is to provide a fuel cell stack, wherein the fixing assembly of the fuel cell stack is configured to provide a pressure to the fuel cell stack by the force-bearing surface of the end plate of the fuel cell stack. In other words, the force provided by the fixing assembly for the fuel cell stack of the present invention is directly applied to the force-bearing surface of the end plate, rather than to a small area of the end plate, to avoid uneven application of force to different areas of the fuel cell stack.
Another object of the present invention is to provide a fuel cell stack, wherein a fixing member of the fuel cell stack is configured to be fixed to the fuel cell stack by a guide groove and a stopper groove of an end plate of the fuel cell stack, so that the difficulty of assembling the fuel cell stack is reduced and the assembling accuracy is improved.
Another object of the present invention is to provide a fuel cell stack in which a fixing assembly of the fuel cell stack does not require a precise part and a complicated structure, and the manufacturing process thereof is simple and low-cost.
Another object of the present invention is to provide a fixing assembly for a fuel cell stack, which can be applied to an existing fuel cell stack by a user without any modification of the electrode plates of the existing fuel cell stack.
Other objects and features of the present invention will become more fully apparent from the following detailed description and appended claims, taken in conjunction with the accompanying drawings, wherein like reference numerals refer to like parts throughout.
In accordance with one aspect of the present invention, the foregoing and other objects and purposes can be accomplished by the present invention comprising:
two end plates;
at least one fuel cell, wherein the fuel cell is stacked between two end plates; and
and the binding pieces are arranged to be respectively bound on the outer sides of the two end plates along the stacking direction of the fuel battery single body, and can apply binding force to the end plates so as to ensure that the fuel battery single body is stacked between the two end plates.
According to the preferred embodiment of the present invention, the binding member can be any object having a binding function. Preferably, the tie down is in the form of a strap.
According to another aspect of the present invention, there is further provided an end plate for a fuel cell stack, wherein the end plate has an outer side and a plurality of pairs of retaining grooves disposed on the outer side, wherein each of the pairs of retaining grooves includes two retaining grooves disposed opposite to each other.
Further, the end plate further has a set of guiding grooves, wherein the guiding grooves are arranged parallel to each other with a predetermined distance therebetween.
Preferably, the guide groove of the end plate has the same width as the width of the binding portion of the binding member of the fixing assembly for the fuel cell stack.
In another aspect of the present invention, the present invention further provides a stacking method for a fuel cell stack, comprising the steps of:
(A) laterally and horizontally placing the tie of the tie group;
(B) making the binding pieces of the binding piece group parallel to each other;
(C) longitudinally placing an end plate on the binding piece, and enabling the outer side of the end plate to be located at a preset position of the binding part of each binding piece of the binding piece group;
(D) stacking a fuel cell on the end plate;
(E) stacking another fuel cell unit on the previous fuel cell unit;
(F) repeating step (E) a predetermined number of times;
(G) placing the other end plate longitudinally above the uppermost fuel cell; and
(H) the two fixed ends of each binding piece of the binding piece group are respectively connected together and tightened.
In another aspect of the present invention, the present invention further provides a fixing assembly for a fuel cell stack, comprising:
a set of tie down members; and
a set of first fasteners, wherein each said tie has two fixed ends and a tie extending between said fixed ends, wherein said first fasteners are respectively disposed at said fixed ends of said tie, wherein said first fasteners are configured to be coupled together.
Further objects and purposes of the present invention will become more fully apparent from the ensuing description and the accompanying drawings.
These and other objects, features and objects of the present invention will become more fully apparent from the following detailed description, the accompanying drawings and the appended claims.
Drawings
Fig. 1 is a front view of a fuel cell stack according to a preferred embodiment of the present invention.
Fig. 2 is an exploded view of a fuel cell stack according to the preferred embodiment of the present invention described above.
Fig. 3 is a perspective view of a fixing assembly of a fuel cell stack according to the preferred embodiment of the present invention described above.
Fig. 4 is a perspective view of a binder of a fixing assembly of a fuel cell stack according to the preferred embodiment of the present invention described above.
Fig. 5 is an enlarged view of the first fastening member of the fixing assembly of the fuel cell stack according to the preferred embodiment of the present invention described above.
Fig. 6 is a perspective view of an end plate of a fuel cell stack according to the preferred embodiment of the present invention described above.
Fig. 7 is a plan view of a fuel cell stack according to the preferred embodiment of the present invention described above, in which the fuel cell stack shown in the figure is fixed.
Fig. 8 is a perspective view of a fuel cell stack according to the preferred embodiment of the present invention as described above, in which the fuel cell stack shown in the drawing is stacked and to be fixed.
Fig. 9 is a flowchart of a stacking method for a fuel cell stack according to the preferred embodiment of the present invention described above.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
Referring to fig. 1 to 8 of the drawings, a fuel cell stack according to a preferred embodiment of the present invention is illustrated, wherein the fuel cell stack includes two end plates 10, a set of fuel cells 20, and a set of binders 30, wherein the fuel cells (or the set of fuel cells) 20 are stacked between the two end plates 10, the binders 30 are disposed to bind to outer sides 11 of the two end plates 10 in a stacking direction of the fuel cells 20, respectively, wherein the binders 30 are disposed to apply a binding force to the end plates 10, thereby ensuring that the fuel cells 20 are stacked between the two end plates 10. In other words, when the binder 30 is bound to the two end plates 10 of the fuel cell stack, the binding force provided by the binder 30 is applied to the fuel cell unit(s) 20 of the fuel cell stack through the end plates 10, thereby pressing the fuel cell units 20 together with force. It will be appreciated by those skilled in the art that the end plates 10 of the fuel cell stack may be of any shape. However, it is apparent that when the end plate 10 has a square shape, it is more advantageous to stack the fuel cell stack and the binder 30 to bind the fuel cells 20. Therefore, preferably, the end plate 10 of the fuel cell stack of the present invention has a square shape. More preferably, the end plate 10 of the fuel cell stack of the present invention is elongated, and the fuel cell stack of the present invention is an elongated (or elongated) fuel cell stack. It will be appreciated that the two end plates 10 of the fuel cell stack of the present invention serve to support the fuel cells 20 and, therefore, may also be considered as support plates.
It should be noted that the fuel cell stack of the present invention may be a proton exchange membrane fuel cell, but may also be other types of fuel cells, such as a methane fuel cell. The fuel cell of the present invention may be either an air-cooled type or a water-cooled type. In other words, the type of fuel cell stack in the present example should not limit the scope of the present invention. For example, the fuel cell stack of the present invention is a hydrogen fuel cell stack, and each fuel cell 10 at least includes an anode plate, a cathode plate, and a membrane electrode assembly disposed therebetween.
As shown in fig. 1 to 8 of the drawings, the binder 30 of the fuel cell stack according to the preferred embodiment of the present invention includes two fixing ends 31 and a binder 32 extending between the two fixing ends 31, wherein the binder 30 is adapted to bind the binder 30 to the end plate 10 of the fuel cell stack by connecting the fixing ends 31 together. It is to be understood that the binding portion 32 of the binding 30 of the fuel cell stack of the present invention may be any mechanism capable of binding to the outer side 11 of the end plate 10 of the fuel cell stack. Preferably, the binding portion 32 of the binding 30 is a binding band.
As shown in fig. 1 to 8 of the drawings, the fuel cell stack according to the preferred embodiment of the present invention further includes a set of first fastening members 40, wherein the first fastening members 40 are respectively provided at the fixed ends 31 of the binder 30, wherein the first fastening members 40 are provided to be capable of being coupled to each other. Further, the first fastening member 40 includes a main body portion 41 and two fastening tabs 42 respectively extending outwardly from the main body portion 41, wherein the fastening tabs 42 have a through hole 420. It is understood that the two first fastening members 40 respectively provided at the fixed end 31 of the binder 30 may be coupled and fixed together through the through-holes 420 thereof. Preferably, the through hole 420 of the first fastening member 40 extends in the same direction as the extension direction of the binding portion 32 of the binding member 30, so that the two first fastening members 40 disposed at the fixed end 31 of the binding member 30 are fastened together.
It is noted that the length of the main body portion 41 of the first fastening member 40 of the fuel cell stack of the present invention is set to be not less than the width of the fixed end 31 of the binder 30, so that the fixed end 31 is fixed to the main body portion 41 of the first fastening member 40. Further, the width of the binding portion 32 of the binding member 30 is set to be not greater than the width of the fixed end 31, so that a user can adjust the length of the binding portion 32 of the binding member 30 bound to the fuel cell stack by wrapping the binding portion 32 of the binding member 30 around the main body portion 41 of the first fastening member 40 or wrapping the binding portion 32 of the main body portion 41 of the first fastening member 40.
As shown in fig. 1 to 8 of the drawings, the main body portion 41 of the first fastening member 40 of the fuel cell stack according to the preferred embodiment of the present invention further has a set of fixing holes 410, wherein the fixing end 31 of the binder 30 is fixed to the main body portion 41 through the fixing holes 410.
As shown in fig. 7 and 8 of the drawings, the fuel cell stack according to the preferred embodiment of the present invention further includes a set of second fastening members 50, wherein each of the second fastening members 50 includes a fastening screw 51 and a fastening nut 52 adapted to be screwed to the fastening screw 51, wherein the screwed end 511 of the fastening screw 51 is disposed to pass through the through hole 420 of the fastening tab 42 of the first fastening member 40, and allows a user to adjust the distance between two first fastening members 40 respectively disposed at the fixed end 31 of the binder 30 by adjusting the fastening nut 52 screwed thereto, so as to adjust the binding strength of the binder 30 to the end plate 10 (or the fuel cell unit 20) of the fuel cell stack. It is to be understood that the first fasteners 40 of the fuel cell stack according to the present invention are fixed together by the second fasteners 50. Therefore, the connection between the two first fastening members 40 provided in the same binder 30 can be easily released.
As shown in fig. 6 to 8 of the drawings, the end plate 10 of the fuel cell stack according to the preferred embodiment of the present invention further has a plurality of limiting groove pairs 100, wherein each limiting groove pair 100 includes two limiting grooves 101 disposed at intervals, wherein the distance between the two limiting grooves 101 of the limiting groove pair 100 is set to be the same as the length of the main body portion 41 of the first fastening member 40, and the shape and size of the two limiting grooves 101 of the limiting groove pair 100 are respectively designed according to the shape and size of the fastening tab 42 of the first fastening member 40, so that the fastening tab 42 of the first fastening member 40 can be respectively placed in the limiting grooves 101 of the limiting groove pair 100, thereby preventing the binder 30 from sliding relative to the outer side 11 of the end plate 10 under the external force after being bound to the end plate 10 of the fuel cell stack by the first fastening member 40. Particularly, the binding member 30 is prevented from sliding with respect to the end plate 10 when the user adjusts the binding strength of the binding member 30 to the fuel cell stack by means of the second fastening member 50.
As shown in fig. 6 to 8 of the drawings, the end plate 10 of the fuel cell stack according to the preferred embodiment of the present invention has a set of guide grooves 102, wherein the guide grooves 102 are transversely disposed on the outer side 11 of the end plate 10, wherein the width of the guide grooves 102 is set to be the same as the width of the binding portions 32 of the binding members 30, so that the binding portions 32 of the binding members 30 can be properly placed in the guide grooves 102 to prevent the binding portions 32 of the binding members 30 from longitudinally sliding. Preferably, the guide grooves 102 of the end plate 10 of the fuel cell stack of the present invention are respectively disposed between the two guide grooves 101 of the pair of guide grooves 100, so that the binding portion 32 of the binding 30 can be properly placed in the guide grooves 102 to prevent the longitudinal sliding of the binding portion 32 of the binding 30 when the fixed end 32 of the binding 30 is fixed together by the first and second fasteners 40 and 50. It can be understood that the sliding of the binder 30 with respect to the end plate 10 is well prevented after the binder 30 is bound to the fuel cell stack by the restraining groove 101 and the guide groove 102 of the end plate 10. In other words, unless the connection of the two fixed ends 32 of the binder 30 is broken by an external force tool, the binder 30 disposed at the end plate 10 of the fuel cell stack is hardly detached from the end plate 10. More preferably, the guiding grooves 102 are arranged parallel to each other, and each two adjacent guiding grooves 102 have a predetermined distance therebetween. Most preferably, the predetermined distances between the guide grooves 102 are the same in magnitude.
As shown in fig. 6 to 8 of the drawings, further, the guide groove 102 of the end plate 10 of the fuel cell stack of the present invention has a bottom wall 1020, wherein the bottom wall 1020 of the guide groove 102 has two guide ends 1021, wherein the guide ends 1021 form an arc-shaped guide surface 1022 extending from inside to outside to guide the binding part 32 of the binding member 30 to be placed in the guide groove 102 when a user binds the binding member 30 to the end plate 10 of the fuel cell stack. Preferably, the bottom wall 1020 of the guide groove 102 is configured such that when the restraining element 30 is disposed in the guide groove 102, the restraining portion 32 of the restraining element 30 can be tightly attached to the bottom wall 1020 of the guide groove 102 of the end plate 10, so that the restraining element 30 can be stably restrained to the end plate 10 of the fuel cell stack and is not easy to slide.
It is noted that the retaining groove 101 and the guide groove 102 of the end plate 10 may be provided to communicate with each other and further provided to hide the first fastening member 40 and the fixed end 31 and the binding portion 32 of the binding member 30 of the fuel cell stack of the present invention within the retaining groove 101 and the guide groove 102 of the end plate 10, so as to facilitate the use and subsequent assembly of the fuel cell stack of the present invention. It will be understood by those skilled in the art that when the first fastening member 40 and/or the fixed end 31 of the binder 30 and the binder 32 of the fuel cell stack of the present invention are convexly disposed outside the end plate 10, the external appearance of the fuel cell stack is affected, the smooth placement of the fuel cell stack is affected, and even the subsequent assembly and use of the fuel cell stack may be affected, such as communicating the fuel cell stack with a fuel supply device, so that the fuel supply device can supply fuel to the fuel cell stack.
As shown in fig. 1 to 8 of the drawings, according to a preferred embodiment of the present invention, the present invention further provides an end plate 10 for a fuel cell stack, wherein the end plate 10 has an outer side 11 and a plurality of pairs of retaining grooves 100 disposed on the outer side 11, wherein each pair of retaining grooves 100 includes two retaining grooves 101 disposed oppositely. Further, the end plate 10 further has a set of guiding grooves 102, wherein the guiding grooves 102 are respectively disposed between the two limiting grooves 101 of the limiting groove pair 100. Preferably, the guiding grooves 102 are arranged parallel to each other, and a predetermined distance is provided between every two adjacent guiding grooves 102. More preferably, the predetermined distances between the guide grooves 102 are the same.
As shown in fig. 1 to 8 of the drawings, according to the preferred embodiment of the present invention, the present invention further provides a fixing assembly for a fuel cell stack, which comprises a set of binding members 30 and a set of first fastening members 40, wherein each binding member 30 has two fixing ends 31 and a binding portion 32 extending between the fixing ends 31, wherein the first fastening members 40 are respectively disposed at the fixing ends 31 of the binding members 30, wherein the first fastening members 40 are configured to be connected together.
As shown in fig. 1 to 8 of the drawings, the first fastening member 40 of the fixing assembly for a fuel cell stack according to the present invention includes a main body portion 41 and two fastening tabs 42 respectively extending outward from the main body portion 41, wherein the fastening tabs 42 have a through hole 420. Accordingly, the two first fastening members 40 of the fixing assembly may be connected and fixed together through the through holes 420 thereof. Preferably, the length of the main body portion 41 of the first fastening member 40 is set to be not less than the width of the fixed end 31 of the binder 30, so that the fixed end 31 is fixed to the main body portion 41 of the first fastening member 40. More preferably, the width of the binding part 32 of the binding member 30 is set to be not greater than the width of the fixed end 31, so that a user can adjust the length of the binding part 32 of the binding member 30 bound to the fuel cell stack by wrapping the binding part 32 of the binding member 30 around the main body part 41 of the first fastening member 40 or wrapping the binding part 32 of the main body part 41 of the first fastening member 40.
As shown in fig. 1 to 8 of the drawings, the fixing assembly for a fuel cell stack of the present invention further includes a set of second fastening members 50, wherein each of the second fastening members 50 includes a fastening screw 51 and a fastening nut 52 adapted to be screwed to the fastening screw 51, wherein a screwed end 511 of the fastening screw 51 is disposed to pass through the through hole 420 of the fastening tab 42 of the first fastening member 40, and allows a user to adjust a distance between two first fastening members 40 respectively disposed at the fixed ends 31 of the binder 30 by adjusting the fastening nuts 52 screwed thereto, so as to adjust a binding strength of the binder 30 to the end plate 10 (or the fuel cell unit 20) of the fuel cell stack.
As shown in fig. 1 to 8 of the drawings, the fixing assembly for a fuel cell stack of the present invention further has a plurality of limiting groove pairs 100 adapted to be disposed at the outer sides of end plates of the fuel cell stack, wherein each limiting groove pair 100 includes two limiting grooves 101 disposed at intervals, wherein the distance between the two limiting grooves 101 of the limiting groove pair 100 is set to be the same as the length of the main body portion 41 of the first fastening member 40, and the shapes and sizes of the two limiting grooves 101 of the limiting groove pair 100 are designed according to the shape and size of the fastening tab 42 of the first fastening member 40, respectively, so that the fastening tab 42 of the first fastening member 40 can be disposed in the limiting grooves 101 of the limiting groove pair 100, respectively.
As shown in fig. 1 to 8 of the drawings, the fixing assembly for a fuel cell stack of the present invention further has a set of guide grooves 102 adapted to be disposed at the outer sides of the end plates of the fuel cell stack, wherein the width of the guide grooves 102 is set to be the same as the width of the binding portion 32 of the binding member 30, so that the binding portion 32 of the binding member 30 can be properly placed in the guide grooves 102. Preferably, the guide grooves 102 of the fixing assembly for a fuel cell stack of the present invention are respectively disposed between the two guide grooves 101 of the pair of guide grooves 100.
As shown in fig. 9 of the drawings, the present invention further provides a stacking method for a fuel cell stack according to a preferred embodiment of the present invention, comprising the steps of:
(A) laterally and horizontally placing the tie of the tie group;
(B) making the binding pieces of the binding piece group parallel to each other;
(C) longitudinally placing an end plate on the binding piece, and enabling the outer side of the end plate to be located at a preset position of the binding part of each binding piece of the binding piece group;
(D) stacking a fuel cell on the end plate;
(E) stacking another fuel cell unit on the previous fuel cell unit;
(F) repeating step (E) a predetermined number of times;
(G) placing the other end plate longitudinally above the uppermost fuel cell; and
(H) the two fixed ends of each binding piece of the binding piece group are respectively connected together and tightened.
Further, the step (H) includes the steps of:
(H1) respectively connecting two fixed ends of each binding piece of the binding piece group together; and
(H2) adjusting the distance between the two fixed ends of each binding piece of the binding piece group respectively, thereby adjusting the binding force applied by the binding piece on the end plate to a preset magnitude and enabling each binding piece to be tightly bound on the end plate.
Further, preferably, adjacent two of the binding members of the binding member group of the fuel cell stack of the present invention are spaced apart by a predetermined distance.
Further, the stacking method for a fuel cell stack of the present invention includes the steps of:
(L) placing the binding part of each binding piece of the binding piece group in the guide groove of the end plate, wherein the guide grooves are respectively disposed at the preset positions.
It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention.
The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.
Claims (20)
1. A fuel cell stack, comprising:
two end plates;
at least one fuel cell, wherein the fuel cell cells are stacked between two end plates; and
a set of binding pieces, wherein the binding pieces are arranged to be respectively bound on the outer sides of the two end plates along the stacking direction of the fuel battery single cells, and the binding pieces are arranged to apply a binding force to the end plates so as to ensure that the fuel battery single cells are stacked between the two end plates.
2. The fuel cell stack of claim 1 further comprising a set of first fasteners, wherein the tie includes two fixed ends and a tie extending between the two fixed ends, wherein the first fasteners are disposed at the fixed ends of the tie, respectively, and the first fasteners are configured to couple to each other.
3. The fuel cell stack of claim 2, wherein the first fastener includes a body portion and two fastening tabs each extending outwardly from the body portion, wherein the fastening tabs have a through hole.
4. The fuel cell stack according to claim 3, wherein the end plate further has a plurality of stopper groove pairs, wherein each stopper groove pair includes two stopper grooves provided at intervals, wherein a distance between the two stopper grooves of the stopper groove pair is set to be the same as a length of the main body portion of the first fastening member, and shapes and sizes of the two stopper grooves of the stopper groove pair are designed according to a shape and a size of the fastening tab of the first fastening member, respectively.
5. The fuel cell stack of claim 2, wherein the end plate has a set of guide grooves, wherein the guide grooves are laterally disposed outside the end plate, wherein a width of the guide grooves is set to be the same as a width of the binding portions of the binding.
6. The fuel cell stack according to claim 4, wherein the end plate has a set of guide grooves, wherein the guide grooves are laterally provided on the outer side of the end plate, wherein the width of the guide grooves is set to be the same as the width of the binding portions of the binding, wherein the guide grooves of the end plate are respectively provided between the two guide grooves of the pair of guide grooves.
7. The fuel cell stack according to claim 5, wherein said guide groove of said end plate has a bottom wall, wherein said bottom wall of said guide groove has two guide ends, wherein said guide ends form an arc-shaped guide surface extending from inside to outside.
8. The fuel cell stack according to claim 6, wherein said guide groove of said end plate has a bottom wall, wherein said bottom wall of said guide groove has two guide ends, wherein said guide ends form an arc-shaped guide surface extending from inside to outside.
9. The fuel cell stack of claim 3, further comprising a set of second fastening members, wherein each of the second fastening members includes a fastening screw and a fastening nut adapted to be screwed to the fastening screw, wherein a screw-coupling end of the fastening screw is disposed to be capable of passing through the through-hole of the fastening joint of the first fastening member, and allows a user to adjust a distance between the two first fastening members disposed at the fixed ends of the tie-down members, respectively, by adjusting the fastening nut screwed thereto.
10. The fuel cell stack of claim 6, further comprising a set of second fastening members, wherein each of the second fastening members includes a fastening screw and a fastening nut adapted to be screwed to the fastening screw, wherein a screw-coupling end of the fastening screw is disposed to be capable of passing through the through-hole of the fastening joint of the first fastening member, and allows a user to adjust a distance between the two first fastening members disposed at the fixed ends of the tie-down members, respectively, by adjusting the fastening nut screwed thereto.
11. The fuel cell stack according to claim 3, 4, 5, 6, 7, 8, 9 or 10, wherein a length of the main body portion of the first fastening member is set to be not less than a width of the fixed end of the binder.
12. The fuel cell stack according to claim 3, 4, 5, 6, 7, 8, 9 or 10, wherein a width of the binding portion of the binding is set to be not more than a width of the fixed end.
13. The fuel cell stack of claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the end plate is elongated.
14. The fuel cell stack according to claim 5, 6, 7, 8, 9 or 10, wherein the guide grooves are arranged parallel to each other with a predetermined distance between every two adjacent guide grooves.
15. The fuel cell stack of claim 14, wherein the predetermined distances between the guide grooves are the same size.
16. An end plate for a fuel cell stack, the end plate having an outer side and a plurality of pairs of retaining grooves disposed on the outer side, wherein each of the pairs of retaining grooves includes two oppositely disposed retaining grooves.
17. The end plate of claim 16, further having a set of guide slots, wherein the guide slots are disposed laterally outside of the end plate, wherein the guide slots of the end plate are disposed between the two guide slots of the pair of guide slots, respectively.
18. The end plate of claim 17, wherein said guide slot of said end plate has a bottom wall, wherein said bottom wall of said guide slot has two leading ends, wherein said leading ends form an arcuate guide surface extending from the inside to the outside.
19. A stacking method for a fuel cell stack, comprising the steps of:
(A) laterally and horizontally placing the tie of the tie group;
(B) -making the tie-down members of said set parallel to each other;
(C) longitudinally placing an end plate over said tie down with the outside of said end plate in a predetermined position of the tie down portion of each tie down of said set of tie down members;
(D) stacking a fuel cell on the end plate;
(E) stacking another fuel cell unit on the previous fuel cell unit;
(F) repeating step (E) a predetermined number of times;
(G) placing the other end plate longitudinally above the uppermost fuel cell; and
(H) and respectively connecting the two fixed ends of each binding piece of the binding piece group together and tightly binding.
20. The stacking method of claim 19, wherein step (H) comprises the steps of:
(H1) respectively connecting two fixed ends of each binding piece of the binding piece group together; and
(H2) adjusting the distance between the two fixed ends of each binding piece of the binding piece group respectively, thereby adjusting the binding force applied by the binding pieces on the end plate to a preset magnitude and enabling each binding piece to be tightly bound on the end plate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018106709611 | 2018-06-26 | ||
| CN201810670961 | 2018-06-26 |
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| Publication Number | Publication Date |
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| CN110718710A true CN110718710A (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810819309.1A Pending CN110718710A (en) | 2018-06-26 | 2018-07-24 | Fuel cell stack and stacking method thereof |
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| WO2021168893A1 (en) * | 2020-02-29 | 2021-09-02 | 深圳市雄韬电源科技股份有限公司 | Stack pre-binding structure |
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