CN114464837A - Fuel cell system and assembly process - Google Patents
Fuel cell system and assembly process Download PDFInfo
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- CN114464837A CN114464837A CN202111173443.7A CN202111173443A CN114464837A CN 114464837 A CN114464837 A CN 114464837A CN 202111173443 A CN202111173443 A CN 202111173443A CN 114464837 A CN114464837 A CN 114464837A
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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
- H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
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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
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The invention discloses a fuel cell system and an assembly process, the fuel cell system comprises a shell, a central manifold and 2 electric stacks, wherein the central manifold and the 2 electric stacks are positioned in the shell; the 2 galvanic piles are all connected with the shell, and the central manifold is arranged among the 2 galvanic piles; the central manifold is connected with the air inlet end plates of the 2 electric piles, and at least 2 groups of positioning structures are arranged on the central manifold and the air inlet end plates; the shell is provided with an assembly hole, a fluid input pipeline and a fluid output pipeline of the central manifold extend out of the shell through the assembly hole, and a gap between the fluid input pipeline and the assembly hole and a gap between the fluid output pipeline and the assembly hole are sealed through at least 1 sealing element. The invention can realize the power output of the high-power electric pile for improving the power through the two electric piles with smaller power on one hand, and accurately ensure the adaptation between the fluid pipelines of the adaptation device and between the adaptation device and other parts on the other hand, and ensure the sealing performance of the fuel cell system.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell system and an assembly process.
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.
Along with the continuous improvement of the power output requirement of the whole vehicle, the output power of the fuel cell stack is also continuously improved; along with the improvement of the integration level requirement of the whole vehicle, the integration level requirement of the fuel cell stack is gradually improved. In view of the need for continuous ingress and egress of the reaction medium during the electrochemical reaction of the fuel cell, an adapter, i.e., a central manifold, is typically provided within the fuel cell stack housing to interface with the plurality of stacks and to adapt the reaction medium. Considering that the fuel cell has large output working voltage and high working current, the integral fuel cell has high electrical safety requirement and high insulation resistance requirement, and the adapter is made of a non-metal material with high electrical safety performance; the number of flow channels of the adapter device is usually 6 or 7 or more, taking into account the variety of fuel cell media.
However, after the adapting device is introduced in the prior art, effective sealing between the adapting device and the shell cannot be guaranteed, the technical problem of sealing failure exists, and meanwhile, the adaptation between fluid pipelines of the adapting device and the adaptation between the adapting device and other parts cannot be accurately guaranteed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a fuel cell system and an assembly process, which can accurately ensure the adaptation between fluid pipelines of an adaptation device and between the adaptation device and other parts, and ensure the sealing performance of the fuel cell system.
The technical scheme adopted for achieving the purpose of the invention is that the fuel cell system comprises a shell, a central manifold and 2 electric stacks, wherein the central manifold and the 2 electric stacks are positioned in the shell; the 2 electric piles are all connected with the shell, and the central manifold is arranged between the 2 electric piles; the central manifold is connected to the air inlet end plates of the 2 electric stacks, and at least 2 groups of positioning structures are arranged on the central manifold and the air inlet end plates; the casing is provided with an assembly hole, a fluid input pipeline and a fluid output pipeline of the central manifold extend out of the casing through the assembly hole, and a gap between the fluid input pipeline and the assembly hole and a gap between the fluid output pipeline and the assembly hole are sealed through at least 1 sealing element.
Furthermore, the positioning structure comprises a positioning hole and a positioning pin arranged in the positioning hole, and the positioning hole is correspondingly arranged on the central manifold and the air inlet end plate.
Further, the positioning structure comprises a positioning hole and a positioning boss, one of the positioning hole and the positioning boss is arranged on the central manifold, and the other one of the positioning hole and the positioning boss is arranged on the air inlet end plate.
Furthermore, the bottom of the shell is provided with guide sleeves which protrude out of the outer molded surface of the shell and correspond to the assembling holes one by one, and the guide sleeves and/or the corresponding fluid input pipeline/fluid output pipeline are/is provided with mounting grooves for mounting the sealing elements.
Further, at least 2 sealing pieces are arranged between each guide sleeve and the corresponding fluid input pipeline/fluid output pipeline at intervals along the axial direction.
Based on the same inventive concept, the invention also provides an assembly process applied to the fuel cell system, which comprises the following steps:
placing the central manifold between the 2 electric stacks, positioning the central manifold and an air inlet end plate of the 2 electric stacks through the at least 2 groups of positioning structures, and connecting and fixing the air inlet end plate and the central manifold so that the 2 electric stacks and the central manifold are assembled to form a sub-assembly;
and the sub-assemblies are arranged in the shell, and the fluid input pipeline and the fluid output pipeline of the central manifold correspondingly extend into the corresponding assembly holes and penetrate out of the shell.
Further, before the central manifold is positioned with the inlet end plates of the 2 stacks, the assembly process further includes: the central manifold is calibrated so that the position of the fluid input conduit and/or the fluid output conduit is the same as the design position.
Further, the calibrating the central manifold specifically includes:
calibrating the central manifold by a profiling fixture; the profiling tool is provided with a boss for supporting the air inlet end plate and a guide cylinder for extending the fluid input pipeline/fluid output pipeline out of the shell, the boss is the same as the structure of the protruding part on the shell, and the guide cylinder is the same as the structure of the assembly hole.
Furthermore, the positioning structure comprises a positioning hole and a positioning pin arranged in the positioning hole, and the central manifold and the air inlet end plate are both correspondingly provided with the positioning hole; the positioning of the central manifold and the inlet end plates of the 2 stacks specifically comprises:
and aligning the central manifold with the positioning hole on the air inlet end plate, and penetrating the positioning pin into the positioning hole of the central manifold and the air inlet end plate so as to position the central manifold and the air inlet end plate.
Further, the positioning structure comprises a positioning hole and a positioning boss which are matched, one of the positioning hole and the positioning boss is arranged on the central manifold, and the other one of the positioning hole and the positioning boss is arranged on the air inlet end plate; the positioning of the central manifold and the inlet end plates of the 2 stacks specifically comprises:
aligning the matched positioning holes and the positioning bosses which are respectively arranged on the central manifold and the air inlet end plate, wherein the positioning bosses and the positioning holes are aligned one by one and are sleeved with each other
According to the technical scheme, the fuel cell system comprises a shell, a central manifold and 2 electric stacks, wherein the central manifold and the 2 electric stacks are positioned in the shell; 2 galvanic piles all are connected with the casing, central manifold sets up between 2 galvanic piles, central manifold connects on the inlet end plate with 2 galvanic piles, central manifold is used for respectively distributing 2 galvanic piles, be in the same place 2 galvanic pile integrations, can realize carrying out the high-power galvanic pile power output that power promoted through two less power galvanic piles, especially well low power galvanic pile power promotion to mirror symmetry, and be provided with 2 at least group location structures on central manifold and the inlet end plate, with the location of guaranteeing to connect fixedly accurate, central manifold passes through the galvanic pile brief introduction and fixes on the casing, avoid having positioning deviation between central manifold and the end plate, need the technical problem of many times regulation. Be provided with the pilot hole on the casing, the fluid input pipeline and the fluid output pipeline of central manifold stretch out outside the casing through the pilot hole, the clearance between fluid input pipeline and the pilot hole and the clearance between fluid output pipeline and the pilot hole are all sealed through 1 at least sealing member, guarantee fuel cell system's whole sealing performance, effective waterproof dustproof, can solve the inside adapter device of fuel cell pile casing and be sealed between the fluid pipeline of central manifold and the casing promptly, realize between the pipeline, adaptation between the different parts, guarantee job stabilization nature.
According to the assembly process applied to the fuel cell system, before the air inlet end plate and the central manifold are connected and fixed, the air inlet end plate and the central manifold are positioned in advance through the positioning structure, the positioning accuracy of connection and fixation is guaranteed, the position accuracy of the central manifold mounted on the air inlet end plates of the electric piles on two sides can be better guaranteed, 2 electric piles are distributed through one central manifold, and the position and the adaptation of the central manifold and the two electric piles are guaranteed.
Compared with the assembly process in the prior art that the galvanic pile and the central manifold are both directly and fixedly connected with the shell, the invention directly fixes the central manifold on the air inlet end plate of the galvanic pile, thereby ensuring that the flow channel of the central manifold is directly aligned and communicated with the flow channel opening of the air inlet end plate on the one hand and solving the technical problem that the communication between the central manifold and the end plate cannot be ensured in the prior art; after the assembly is formed on one side, the central manifold is indirectly fixed through the fixing of the galvanic piles in the shell, but the central manifold is not directly connected with the shell, two galvanic piles and the central manifold are not required to be respectively fixed on the shell for three times, the installation process is simple, the implementation is convenient, and the assembly precision is high.
Drawings
Fig. 1 is a diagram showing an overall configuration of a fuel cell system according to embodiment 1 of the present invention;
fig. 2 is a front view of the fuel cell system in fig. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is an enlarged view of the bottom portion of FIG. 3;
FIG. 5 is a cross-sectional view taken at C-C of FIG. 2;
fig. 6 is a left side view of the fuel cell system of fig. 1;
FIG. 7 is a cross-sectional view taken along line D-D of FIG. 6;
FIG. 8 is an enlarged schematic view at E in FIG. 7;
fig. 9 is a schematic perspective view of a profiling tool provided in embodiment 2 of the present invention;
FIG. 10 is another schematic view from the perspective of the profiling fixture of FIG. 9;
FIG. 11 is a front view of the profiling fixture of FIG. 9;
fig. 12 is a top view of the profiling fixture of fig. 9.
Reference numerals: 1-a shell, 11-a first box, 12-a second box, 13-a guide sleeve, 14-a first bulge; 2-electric pile, 21-air inlet end plate; 3-a central manifold; 4-a positioning structure; 5-a seal; 6-profiling tooling, 61-boss and 62-guide cylinder.
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.
In order to solve the technical problems, the invention provides a fuel cell system and an assembly process, which can accurately ensure the adaptation among fluid pipelines of a central manifold and the adaptation between an adaptation device and other parts by improving the connection relation, the structure and the assembly steps among a stack, the central manifold and a shell. The content of the invention is specifically illustrated by 2 specific examples below:
example 1
The embodiment of the invention provides a fuel cell system, which comprises a shell 1, a central manifold 3 and 2 electric stacks 2, wherein the central manifold 3 is positioned in the shell 1; 2 galvanic pile 2 all are connected with casing 1, central manifold 3 sets up between 2 galvanic piles 2, central manifold 3 is connected on the inlet end plate 21 with 2 galvanic piles 2, central manifold 3 is used for respectively distributing 2 galvanic piles 2, 2 galvanic piles 2 are integrated together, can realize carrying out the high-power galvanic pile 2 power output of power promotion through two less power galvanic piles 2, especially to the middle and small power galvanic pile 2 power promotion of mirror symmetry, and be provided with 2 at least group location structures 4 on central manifold 3 and the inlet end plate 21, fix the location accurate in order to guarantee to connect fixedly, central manifold 3 fixes on casing 1 through the brief introduction of galvanic pile 2, avoid having positioning deviation between central manifold 3 and the end plate, need the technical problem of many times regulation. Be provided with the pilot hole on casing 1, central manifold 3's fluid input pipeline and fluid output pipeline stretch out outside casing 1 through the pilot hole, the clearance between fluid input pipeline and the pilot hole and the clearance between fluid output pipeline and the pilot hole are all sealed through 1 at least sealing member 5, guarantee fuel cell system's whole sealing performance, effective waterproof dustproof, can solve 2 inside adapter devices of fuel cell galvanic pile 2 casing 1 and be the fluid pipeline of central manifold 3 and the casing between 1, between the realization pipeline, adaptation between the different parts, guarantee job stabilization nature.
In the prior art, 2 stacks 2 and a central manifold 3 are usually fixed on a housing 1 respectively, but the prior art has the following defects: on one hand, three times of assembly and fixation are required on the shell 1, and the assembly steps are complicated; on the other hand, the central manifold 3 is used for air inlet and distribution of the two electric piles 2, but the prior scheme can not ensure accurate alignment of the two flow passage ports. In this embodiment, central manifold 3 and inlet end plate 21 are assembled in advance, and location structure 4's effect lies in guaranteeing relative position between them before central manifold 3 and inlet end plate 21 locking is fixed through the connecting piece, directly guarantees central manifold 3 and end plate direct intercommunication, and avoids fixing many times dismouting regulation that locking back position deviation leads to. The specific embodiment of the positioning structure 4 is not limited in the present invention, as long as the pre-alignment can be achieved, as an alternative, the positioning structure 4 includes a positioning hole and a positioning pin installed in the positioning hole, and the central manifold 3 and the intake end plate 21 are both provided with the positioning hole correspondingly. As another alternative, the positioning structure 4 includes a positioning hole and a positioning boss, one of which is provided on the center manifold 3 and the other of which is provided on the intake end plate 21.
In order to precisely guide and position the central manifold 3 and further ensure that no position deviation or extrusion exists, in the present embodiment, the bottom of the housing 1 is provided with guide sleeves 13 protruding from the outer profile of the housing 1 and corresponding to the assembly holes one by one, and in order to ensure the waterproof and dustproof performance of the fuel cell system, in the present embodiment, the guide sleeves 13 and/or the corresponding fluid input/output pipes are provided with mounting grooves for mounting the sealing members 5.
In order to further ensure the stability of the operation of the fuel cell system, in the present embodiment, at least 2 sealing members 5 are axially spaced between each guide sleeve 13 and the corresponding fluid input/output pipe, so as to ensure effective water and dust prevention through double sealing.
In order to ensure the positions of the two air inlet end plates 21 and the relative fixation of the positions of the air inlet end plates 21 and the central manifold 3, and avoid affecting the air distribution of the central manifold 3, in this embodiment, the first box 11 and the second box 12 of the casing 1 surround to form an installation cavity for installing the cell stacks 2 and the manifold, at least two first bulges 14 and two second bulges are arranged on the inner profile of the second box 12 at intervals, the air inlet end plates 21 of the 2 cell stacks 2 are respectively arranged on the corresponding first bulges 14, the blind end plates of the 2 cell stacks 2 are respectively arranged on the corresponding second bulges, and at least the first bulges 14 are provided with through holes, connecting pieces for connecting the lower casing 1 and the air inlet end plates 21 are arranged in the through holes, so that the connection fixation of the air inlet end plates 21 and the second box 12 is realized. In the present embodiment, each of the air inlet end plates 21 is supported by 3 first protruding portions 14 arranged at intervals, and at least one of the 3 first protruding portions is provided with a through hole.
The fuel cell stack 2 casing 1 is generally composed of a high-strength metal (e.g., an aluminum alloy, etc.) or a high-strength composite material (e.g., SMC, etc.) in consideration of machine molding, collision avoidance, EMC requirements of auxiliary equipment (BOP), etc. Considering that the fuel cell has large output working voltage and high working current, the overall electrical safety requirement of the fuel cell is high, the insulation resistance requirement is high, and generally, the material of the adapting device is a non-metal material with high electrical safety performance. The invention can solve the sealing between each pipeline of the central manifold 3 in the shell 1 of the fuel cell stack 2 and the shell 1, and can realize the adaptation between each pipeline, different materials and different parts.
Example 2
Based on the same inventive concept, the embodiment of the present invention further provides an assembly process applied to the fuel cell system provided in embodiment 1, including the following steps:
placing a central manifold 3 between 2 electric piles 2, positioning the central manifold 3 and an air inlet end plate 21 of the 2 electric piles 2 through at least 2 groups of positioning structures 4, and connecting and fixing the air inlet end plate 21 and the central manifold 3 so that the 2 electric piles 2 and the central manifold 3 are assembled to form a sub-assembly;
the sub-assembly is put into the shell 1, and the fluid input pipeline and the fluid output pipeline of the central manifold 3 correspondingly extend into the corresponding assembly holes and penetrate out of the shell 1.
According to the assembly process for assembling the fuel cell system, before the air inlet end plate 21 and the central manifold 3 are connected and fixed, the air inlet end plate 21 and the central manifold 3 are positioned in advance, the positioning accuracy of connection and fixation is guaranteed, the position accuracy of the central manifold 3 mounted on the air inlet end plates 21 of the cell stacks 2 on two sides can be better guaranteed, the gas is distributed to the 2 cell stacks 2 through the central manifold 3, and the positions and the matching of the central manifold 3 and the two cell stacks 2 are guaranteed.
Compared with the scheme that the electric pile 2 and the central manifold 3 are both directly and fixedly connected with the shell 1 in the prior art, the assembly process provided by the embodiment directly fixes the central manifold 3 on the air inlet end plate 21 of the electric pile 2, so that on one hand, the flow channel of the central manifold 3 is ensured to be directly aligned and communicated with the flow channel opening of the air inlet end plate 21, and the technical problem that the central manifold 3 cannot be ensured to be communicated with the end plate in the prior art is solved; after the assembly is formed on one side, the central manifold 3 is indirectly fixed through the fixing of the electric piles 2 in the shell 1, but the central manifold 3 is not directly connected with the shell 1, two electric piles 2 and the central manifold 3 do not need to be respectively fixed on the shell 1 for three times, the installation process is simple, the implementation is convenient, and meanwhile, the assembly precision is high.
In order to ensure that each flow channel pipe of the central manifold 3 is perfectly matched with the assembly hole and the guide sleeve 13, and avoid factors adverse to the service life of the housing 1 and the working stability of the fuel cell system, such as position deviation and extrusion caused by the position deviation, in this embodiment, before the central manifold 3 is positioned with the air inlet end plate 21 of the 2 stacks 2, the assembly process further includes: the central manifold 3 is calibrated so that the positions of the fluid input pipes and/or the fluid output pipes are the same as the designed positions, mainly when smooth and accurate alignment is not possible, the angles, the positions and the like of the fluid pipes are correspondingly adjusted.
In order to simplify the operation of the calibration step without damaging the casing 1, the present embodiment calibrates the central manifold 3, and specifically includes:
calibrating the central manifold 3 by a profiling tool 6; the profiling tool 6 is provided with a boss 61 for supporting the air inlet end plate 21 and a guide cylinder 62 for extending the fluid input pipeline/fluid output pipeline out of the shell 1, and the boss 61 has the same structure as the first protrusion 14 on the shell 1, and the guide cylinder 62 has the same structure as the assembly hole, in the embodiment, the profiling tool 61: 1, duplicating the bottom structure of the shell 1, where 1: the 1-time-carving finger-shaped profiling tool 6 is provided with all structures related to the assembly of the shell 1 and the central manifold 3, the sizes and the relative positions are completely the same, and the positions between each pipeline of the central manifold 3 and the shell 1 can be well guaranteed. Whether the width size of the first bulge 14 nuclear adapting device is out of tolerance, whether the flatness of the adapting device and the matching plane of the end plates of the two end galvanic piles 2 meets the requirement, and whether the static state is interfered with a positioning boss on the shell 1 of the galvanic pile 2 and fixed with the end plates of the two end galvanic piles 2. The invention does not limit the structure of the profiling tool 6 and the shell 1, and can be determined according to specific conditions, taking the profiling tool 6 shown in the figure as an example, 6 bosses 61 which have the same structure with 6 first bulges 14 on the shell 1 can check whether the width dimension of the central manifold 3 is out of tolerance, whether the flatness of the matching plane of the central manifold 3 and the end plates of the two end electric piles 2 meets the requirement, and whether the central manifold 3 interferes with the positioning bosses which are fixed on the shell 1 of the electric pile 2 and the end plates of the two end electric piles 2 under static state.
As in embodiment 1, in order to achieve one-time locking connection of the connecting member and avoid multiple times of disassembly and assembly adjustment, as an alternative, the positioning structure 4 includes a positioning hole and a positioning pin installed in the positioning hole, and the central manifold 3 and the intake end plate 21 are both provided with corresponding positioning holes. At this time, positioning the central manifold 3 and the inlet end plates 21 of the 2 stacks 2 specifically includes:
the central manifold 3 is aligned with the positioning hole on the air inlet end plate 21, and the positioning pin is inserted into the positioning hole of the central manifold 3 and the air inlet end plate 21, so that the central manifold 3 and the air inlet end plate 21 are positioned.
As another alternative, the positioning structure 4 includes matching positioning holes and positioning bosses, one of which is provided on the central manifold 3 and the other of which is provided on the intake end plate 21. At this time, positioning the central manifold 3 and the inlet end plates 21 of the 2 stacks 2 specifically includes:
the matched positioning holes and positioning bosses which are respectively arranged on the central manifold 3 and the air inlet end plate 21 are aligned, and the positioning bosses and the positioning holes are aligned one by one and are sleeved.
In order to seal the gap between the central manifold 3 and the housing 1, in the present embodiment, after the fluid input pipe and the fluid output pipe of the central manifold 3 are respectively inserted into the corresponding assembly holes and are extended out of the housing 1, the assembly process further includes sealing the gap between each fluid input pipe and the assembly hole and the gap between each fluid output pipe and the assembly hole by at least 1 sealing member 5.
Through the embodiment, the invention has the following beneficial effects or advantages:
1) the invention can realize the power output of the high-power electric pile for improving the power through two electric piles with smaller power, particularly aims at improving the power of the electric piles with small and medium power in mirror symmetry, can effectively solve the sealing between a plurality of flow passages and the shell of the adapter in the shell of the fuel cell electric pile, and realizes the adaptation among a plurality of pipelines, different materials and different parts.
2) Compared with the assembly process in the prior art that the galvanic pile and the central manifold are both directly and fixedly connected with the shell, the invention directly fixes the central manifold on the air inlet end plate of the galvanic pile, thereby ensuring that the flow channel of the central manifold is directly aligned and communicated with the flow channel opening of the air inlet end plate on the one hand and solving the technical problem that the communication between the central manifold and the end plate cannot be ensured in the prior art; after the assembly is formed on one side, the central manifold is indirectly fixed through the fixing of the galvanic piles in the shell, but the central manifold is not directly connected with the shell, two galvanic piles and the central manifold are not required to be respectively fixed on the shell for three times, the installation process is simple, the implementation is convenient, and the assembly precision is high.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A fuel cell system comprising a housing, and a central manifold and 2 stacks located in the housing; the 2 electric piles are all connected with the shell, and the central manifold is arranged between the 2 electric piles; the central manifold is connected to the air inlet end plates of the 2 electric stacks, and at least 2 groups of positioning structures are arranged on the central manifold and the air inlet end plates; the casing is provided with an assembly hole, a fluid input pipeline and a fluid output pipeline of the central manifold extend out of the casing through the assembly hole, and a gap between the fluid input pipeline and the assembly hole and a gap between the fluid output pipeline and the assembly hole are sealed through at least 1 sealing element.
2. The fuel cell system according to claim 1, wherein the positioning structure includes positioning holes and positioning pins fitted in the positioning holes, and the positioning holes are provided on the central manifold and the intake end plate, respectively.
3. The fuel cell system according to claim 1, wherein the positioning structure includes a positioning hole and a positioning boss, one of which is provided on the central manifold and the other of which is provided on the intake end plate.
4. A fuel cell system according to any one of claims 1 to 3, wherein the bottom of the housing is provided with guide sleeves protruding from the outer surface of the housing and corresponding to the fitting holes, and the guide sleeves and/or the corresponding fluid inlet/outlet pipes are provided with mounting grooves for mounting the sealing members.
5. The fuel cell system of claim 4, wherein at least 2 seals are axially spaced between each guide sleeve and the corresponding fluid inlet/outlet conduit.
6. An assembly process applied to the fuel cell system according to any one of claims 1 to 5, characterized in that the assembly process comprises the following steps:
placing the central manifold between the 2 electric stacks, positioning the central manifold and an air inlet end plate of the 2 electric stacks through the at least 2 groups of positioning structures, and connecting and fixing the air inlet end plate and the central manifold so that the 2 electric stacks and the central manifold are assembled to form a sub-assembly;
and the sub-assemblies are arranged in the shell, and the fluid input pipeline and the fluid output pipeline of the central manifold correspondingly extend into the corresponding assembly holes and penetrate out of the shell.
7. The assembly process of claim 6, wherein prior to positioning the central manifold with the inlet end plates of the 2 stacks, the assembly process further comprises: the central manifold is calibrated so that the position of the fluid input conduit and/or the fluid output conduit is the same as the design position.
8. The assembly process according to claim 7, wherein said calibrating the central manifold comprises:
calibrating the central manifold by a profiling fixture; the profiling tool is provided with a boss for supporting the air inlet end plate and a guide cylinder for extending the fluid input pipeline/the fluid output pipeline out of the shell, the boss is of the same structure as the protruding part on the shell, and the guide cylinder is of the same structure as the assembly hole.
9. The assembly process of any one of claims 6 to 8, wherein the positioning structure comprises positioning holes and positioning pins mounted in the positioning holes, and the positioning holes are correspondingly arranged on the central manifold and the air inlet end plate; the positioning of the central manifold and the inlet end plates of the 2 stacks specifically comprises:
aligning the central manifold with the positioning hole in the air inlet end plate, and penetrating the positioning pin into the positioning hole of the central manifold and the air inlet end plate so as to position the central manifold and the air inlet end plate.
10. An assembly process according to any one of claims 6 to 8, wherein the locating structure comprises matching locating holes and locating bosses, one of which is provided on the central manifold and the other of which is provided on the inlet end plate; the positioning of the central manifold and the inlet end plates of the 2 stacks specifically comprises:
and aligning the positioning holes and the positioning bosses which are respectively arranged on the central manifold and the air inlet end plate and are matched with each other, wherein the positioning bosses and the positioning holes are aligned one by one and are sleeved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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|---|---|
| CN114464837B (en) | 2024-01-16 |
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