A high-power fuel cell integrated packaging structure

Abstract

The application discloses a high-power fuel cell integrated packaging structure. The packaging structure is mainly composed of a front end plate assembly, a stack core, a rear end pressure bearing assembly, an upper and lower special-shaped box, a CVM inspection assembly and a rear box cover pressing assembly. The front end plate assembly is arranged at the front end of the stack core. The rear end pressure bearing assembly is arranged at the tail end of the stack core. The upper and lower special-shaped box is composed of an upper box and a lower box, wherein the upper box and the lower box jointly form a containing cavity and wrap the stack core main body. The inner wall of the upper and lower special-shaped box is provided with a damping strip. The side wall cooperates with an inner hexagonal set screw to realize lateral limiting and gap adjustment of the stack core. The rear box cover pressing assembly is composed of a rear insulation plate pressure bearing plate, a rear box cover and a rear box cover sealing cover. The application directly replaces the traditional external locking structure by taking an integrated shell as the bearing and packaging body of the stack, and adapts to the packaging requirements of high-power multi-cavity stack, and realizes comprehensive optimization in aspects of flow channel integration, box structure, pressing mode and equipment adaptability.

Description

Technical Field

[0001] This invention belongs to the field of fuel cells, and specifically relates to an integrated packaging structure for a high-power fuel cell. Background Technology

[0002] Proton exchange membrane fuel cells (PEMFCs) are the core devices for hydrogen energy utilization. With the continuous increase in power demand from commercial vehicles, stationary power generation, and other scenarios, high-power fuel cell stacks have become the mainstream of industry development, and high-power wide-range stacks are a key category within this. As a core design element of the fuel cell stack, stack packaging directly determines its performance stability, volumetric power density, and total lifecycle cost, making it a crucial direction for the technological iteration of high-power fuel cell stacks.

[0003] Traditional screw, tie rod, and steel strip-type external packaging components are numerous and bulky, making them unsuitable for the compact design requirements of high-power fuel cell stacks. While current integrated shell packaging simplifies the external structure, it still has several technical shortcomings: some solutions retain pre-installed tie rods and independent rear end plates, resulting in redundant internal components, insufficient space utilization, and a lack of advantages compared to traditional structures. Furthermore, many new wide-width electrode plates use peripheral fixing, leading to uneven clamping force in the central area, uneven stress on the active area of ​​the membrane electrode, and potential impacts on sealing reliability and reaction consistency; low integration of multi-cavity flow channels, unreasonable CVM inspection design locations, and difficulty in balancing sealing performance and after-sales maintenance convenience; and most integrated packaging solutions rely on large, high-precision dedicated stacking equipment, resulting in high investment costs and unsuitability for the rapid prototyping needs of small batches and multiple specifications during the R&D phase.

[0004] Currently, the industry has developed various technical solutions for integrated packaging of fuel cells, exploring aspects such as stacking and positioning, functional integration, assembly tooling, and pre-tightening structures. However, none of these solutions have been able to address the packaging challenges of new high-power, multi-cavity, wide-range fuel cell stacks.

[0005] For example, CN120165004A describes an integrated fuel cell stack, its pressing method, and its application in fuel cells. By incorporating fixed limiting blocks and removable stacking limiting blocks within the casing, it solves the lateral limiting problem of excessively tall core sections during the initial stacking phase. Combined with the set screws on the encapsulation cover to absorb the clamping force, it enables two pressing modes: constant pressure and constant core height. However, this solution does not optimize the clamping method for high-power, wide-width plates, and the problem of insufficient force at the plate center remains unresolved. The pressing process requires a special press head to pass through the cover opening, placing high demands on the press's specifications and alignment accuracy, making modification costs during the R&D phase difficult to control.

[0006] CN118841611A describes an integrated packaging structure for a vehicle fuel cell stack, which integrates the CVM controller inside the casing. Preload is provided via set screws on the rear cover and disc springs, compensating for core shrinkage caused by temperature fluctuations and maintaining stable clamping force. However, this structure has a large number of internal parts, limiting its space utilization. The concentrated pressure application via set screws also fails to address the issue of uneven stress on wide-width plates. The built-in CVM design necessitates disassembling the entire casing for after-sales inspection, resulting in extremely poor maintenance convenience. Furthermore, this solution is designed for mass production scenarios, requiring high precision in press-fitting tooling and equipment, making it unsuitable for rapid, low-cost prototyping of multiple specifications during the R&D phase.

[0007] CN223842900U is a high-efficiency assembly tooling for an integrated packaged fuel cell stack, primarily optimizing the assembly process. It uses internal and external positioning rods in conjunction with a press platen to press the core into the integrated housing, reducing the assembly difficulty of the integrated housing. However, this is only an improvement at the tooling level; it does not optimize the function and structure of the packaged housing itself. It lacks a built-in limiting structure to replace the pre-installed pull rods, and it does not integrate multi-cavity flow channel distribution and external inspection functions. The functional integration of the housing itself is not high.

[0008] The CN217468512U fuel cell stack encapsulation shell structure, fuel cell stack, and integrated encapsulation mechanism adopt a single-end opening design with a spring tensioning structure, combining pre-tightening and encapsulation functions into one, and cooperating with a robotic arm to complete the core loading. However, the clamping force control precision of the spring structure is limited, and it still cannot solve the problem of insufficient force at the center of wide-width plates; the single-end opening shell form cannot simultaneously meet the requirements of CVM external inspection and structural strength. In addition, this solution requires a dedicated robotic arm, resulting in high equipment investment costs and insufficient flexibility during research and development and prototyping. Summary of the Invention

[0009] To address the problems in existing high-power multi-cavity wide-width fuel cell stack packaging, such as poor compatibility between traditional screw, steel belt, and tie rod structures and integrated housings, low internal space utilization, uneven distribution of clamping force on wide-width plates, and insufficient maintenance convenience, this invention provides an integrated packaging structure for high-power fuel cells. This structure uses an integrated housing as the main support and packaging component for the fuel cell stack, directly replacing the traditional external locking structure. It adapts to the packaging requirements of high-power multi-cavity fuel cell stacks, achieving comprehensive optimization in terms of flow channel integration, housing structure, clamping method, and equipment compatibility.

[0010] The technical solution of this invention is as follows.

[0011] A high-power fuel cell integrated packaging structure, the packaging structure mainly consists of a front-end plate assembly, a core, a rear-end pressure-bearing assembly, upper and lower irregular-shaped boxes, a CVM inspection assembly, and a rear box cover clamping assembly.

[0012] The front-end plate assembly is disposed at the front end of the reactor core; the rear-end pressure-bearing assembly is disposed at the rear end of the reactor core.

[0013] The front-end plate assembly is formed by stacking and sealing a front-end plate pressure plate, a front-end plate distribution plate, and a front-end plate insulation plate. It adopts a split front-end plate manifold structure, which can neatly merge the multiple gas and liquid ports of the wide-width electrode plate into a standard six-port interface. While ensuring insulation performance, structural strength, and sealing reliability, it improves the integration of the flow channel system, simplifies the layout of the external pipeline, and can adapt to the encapsulation requirements of high-power multi-port electrode plates. The rear-end pressure plate assembly adopts a rear insulation plate structure with an embedded metal pressure plate. The upper and lower irregular-shaped boxes (adopting an upper and lower split irregular-shaped staggered structure design) are composed of an upper box and a lower box. The upper and lower boxes together form a receiving cavity and enclose the core body. The inner walls of the upper and lower irregular-shaped boxes are equipped with shock-absorbing strips, and the side walls are equipped with hexagonal set screws to realize the lateral limiting and gap adjustment of the core. The system adopts a lateral limiting scheme with a split upper and lower irregular-shaped box, shock-absorbing strips, and side set screws, replacing the traditional pre-installed tie rod structure. This simplifies the number of internal components and frees up internal layout space. The lateral clearance of the stack core can be flexibly adjusted by turning the hexagonal set screws on the side wall, ensuring that the entire stack is sealed without loosening, thus balancing the reliability of the limiting mechanism and the space utilization rate.

[0014] The front-end board assembly integrates a design with one hydrogen inlet and two outlets, one air inlet and two outlets, and two cooling water inlets and two outlets, distributing and converging to achieve a total of six flow channels for hydrogen, air, and cooling water. Specifically, the front-end board insulation plate has a hydrogen inlet, a first hydrogen outlet, a second hydrogen outlet; a first cooling water inlet, a second cooling water inlet, a first cooling water outlet, a second cooling water outlet, an air inlet, a first air outlet, and a second air outlet; these converge to form a hydrogen inlet, hydrogen outlet, cooling water inlet, cooling water outlet, air inlet, and air outlet on the front-end board pressure plate.

[0015] Furthermore, the side of the upper enclosure is reserved with an external CVM inspection mounting position, which, together with the CVM inspection cover, enables external maintenance; the rear cover integrates the load-bearing and clamping function of the original independent rear end plate, with hexagonal set screws evenly distributed on the end face and a press operation hole reserved.

[0016] Furthermore, the rear end adopts a composite pressure-bearing structure with an insulating plate embedded with a metal pressure-bearing plate, which significantly improves the overall pressure-bearing capacity of the rear end while ensuring complete insulation performance. This structure eliminates the need for an independent rear end plate component, does not significantly increase the axial dimension of the core, and can improve the structural compactness and volumetric power density of the fuel cell stack.

[0017] Furthermore, the upper enclosure features a staggered, pre-installed external CVM inspection structure on the side, paired with a removable inspection cover with double-ring sealing. This allows for the installation, inspection, and replacement of inspection components without disassembling the main enclosure, significantly improving the convenience of after-sales maintenance without compromising the overall strength and sealing performance of the enclosure.

[0018] Furthermore, the rear cover integrates the load-bearing and clamping function of the original independent rear end plate. Multiple hexagonal set screws evenly distributed on the end face can simultaneously press the rear end pressure plate at multiple points, so that the clamping force evenly covers the entire wide plate area, effectively improving the problem of insufficient force in the center area of ​​the plate in the traditional solution. At the same time, the rear cover is reserved with universal standard press operation holes, which can be adapted to conventional fuel cell stacking equipment with only a simple pressure block. There is no need to customize special presses and complex tooling, which reduces the trial production cost and equipment threshold in the research and development stage.

[0019] Furthermore, the overall design adopts a modular split design, and each functional component can be disassembled and replaced independently. For bipolar plate solutions with different specifications and cavity layouts, only the corresponding component size and matching simple tooling need to be adjusted to quickly complete the packaging adaptation, which can meet the rapid iterative trial production needs of multi-specification, small-batch fuel cell stacks in the R&D stage.

[0020] In this invention, the core includes electrode plates and membrane electrodes. The electrode plates and membrane electrodes have pre-drilled internal positioning holes, and the internal positioning structure is thickened and optimized to constrain the overall assembly offset of the electrode stack, ensuring stacking accuracy. This eliminates the bulky external positioning structure of traditional methods, effectively improving the adaptability and versatility of the stacking tooling, resulting in a simpler structure and wider applicability.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] The front-end board of this invention adopts an integrated flow channel design. While meeting the requirements of insulation performance, structural strength and sealing reliability, it integrates a cavity design scheme with one inlet and two outlets for hydrogen, one inlet and two outlets for air, and two inlets and two outlets for cooling water. The distribution and convergence realizes a total of six flow channels for hydrogen, air and cooling water. Compared with the direct outlet flow channel structure, it reduces the complexity of system piping layout. This multi-cavity integrated design concept can also provide a reference for the design of fuel cell stacks with similar cavity layouts.

[0023] The enclosure adopts a split structure with two irregularly shaped shells, and the joint surface is formed by bolt locking. In response to the CVM inspection requirements, a staggered opening design is adopted, and the inspection port can be opened directly from the outside of the enclosure without disassembling the main enclosure. This not only meets the accessibility of after-sales inspection, but also avoids the weakening of the overall strength and sealing performance of the enclosure due to continuous openings.

[0024] Unlike existing integrated packaging solutions that require pre-installed tie rods on the outside of the stack core to ensure stacking accuracy, this solution eliminates the pre-installed tie rod structure, reducing the number of internal components and space occupation. It only achieves limiting by filling the critical positions of the fuel cell stack with shock-absorbing material between the stack and the inner wall of the enclosure. After packaging, the gap between the stack core and the enclosure is finely adjusted by using hexagonal set screws to ensure that the entire stack is secure. This effectively simplifies internal components and improves the space utilization of the enclosure and the volumetric power density of the fuel cell stack.

[0025] This invention eliminates the separate rear end plate component of the fuel cell stack, integrating the load-bearing and clamping functions of the original rear end plate into the rear cover of the housing. After the stack is pressed, the rear cover is secured with hexagonal set screws to ensure a reliable fit and fixation between the rear cover and the fuel cell stack insulation pressure plate, preventing loosening during stack operation. Addressing the issue of insufficient clamping force at the center of the plates in traditional peripheral fixing methods for high-power multi-cavity fuel cell stacks with large plate widths, this integrated rear cover structure achieves uniform pressure across the entire plate surface, effectively improving the stress state in the central area of ​​the wide plates and avoiding performance degradation and sealing failure caused by uneven clamping.

[0026] Furthermore, this packaging solution does not require significant modifications to existing conventional fuel cell stacking equipment. Only simple tooling corresponding to the stack specifications is needed to complete the pressing operation, which can meet the trial production needs of multiple stack specifications in the R&D stage, shorten the trial production cycle, and reduce tooling investment. Attached Figure Description

[0027] Figure 1 This is an exploded view of the integrated packaging structure;

[0028] Figure 2 for Figure 1 A schematic diagram of the front-end plate cavity distribution assembly, which consists of the front-end plate bearing plate, the front-end plate distribution plate, and the front-end plate insulation plate.

[0029] Figure 3 This is a schematic diagram of the mounting position for the hex socket set screw;

[0030] Figure 4 This is a schematic diagram of the structure at the rear end of the box.

[0031] Figure 5 This is a schematic diagram showing the installation positions of the shock-absorbing strips inside the enclosure.

[0032] The components shown in the diagram are as follows: Front end plate bearing plate 1, Front end plate distribution plate 2, Front end plate insulation plate 3, Current collector plate 4, Core 5, Rear insulation plate 6, Rear insulation plate bearing plate 7, Shock absorber strip 8, Upper housing 9, Lower housing 10, CVM inspection cover 11, Rear housing cover 12, Rear housing cover sealing cover 13, Positive and negative electrode covers 14, Copper busbar cover 15, Hex socket set screw 16. Detailed Implementation

[0033] The technical solutions are illustrated in the following description with specific figures to provide a full understanding of this application. However, this application can be implemented in many other ways different from those described herein, and similar extended embodiments made by those skilled in the art without inventive effort are all within the scope of protection of this invention.

[0034] This embodiment discloses an integrated packaging structure for a high-power fuel cell, including a front-end plate bearing plate 1, a front-end plate distribution plate 2, a front-end plate insulation plate 3, a current collector plate 4, a core 5, a rear insulation plate 6, a rear insulation plate bearing plate 7, a shock-absorbing strip 8, an upper housing 9, a lower housing 10, a CVM inspection cover 11, a rear housing cover 12, a rear housing cover sealing cover 13, positive and negative electrode covers 14, a copper busbar bus cover 15, and matching hexagonal set screws 16. The front-end plate bearing plate 1, the front-end plate distribution plate 2, and the front-end plate insulation plate 3 are stacked and assembled sequentially along the axial direction to form the front-end plate assembly; the front and rear current collectors 4 have completely identical structural dimensions and are arranged at both ends of the core respectively; the rear insulation plate 6 and the rear insulation plate bearing plate 7 are fitted together to form the rear-end pressure-bearing whole; the shock-absorbing strip 8 is adjusted according to the different installation positions (up and down, front and back) to adapt the external dimensions accordingly, and the core buffering, limiting, and filling functions remain consistent; the internal hexagon set screw 16 is a cylindrical external thread bolt, and a ball structure can be added to the front cylindrical head to convert the sliding friction during tightening into rolling friction, reducing the frictional damage and stress concentration on the surface of the contact parts during tightening.

[0035] The electrode plate flow channel design of this embodiment of the high-power wide-width fuel cell differs from the conventional standard layout of six chambers (two for hydrogen, two for air, and two for cooling water). To ensure uniform gas-liquid distribution within the wide plate surface, more branching chambers are typically designed. This embodiment employs a complex multi-chamber layout with one hydrogen inlet and two outlets, one air inlet and two outlets, and two cooling water inlets and two outlets. Specifically, the front-end plate insulation plate 3 has a hydrogen inlet 102, a first hydrogen outlet 103, a second hydrogen outlet 104; a first cooling water inlet 202, a second cooling water inlet 203, a first cooling water outlet 204, a second cooling water outlet 205; an air inlet 302, a first air outlet 303, and a second air outlet 304; which converge into the hydrogen inlet 101, hydrogen outlet 105, cooling water inlet 201, cooling water outlet 206, air inlet 301, and air outlet 305 on the front-end plate pressure plate 1.

[0036] In this embodiment, the front-end plate adopts a split three-plate design with different plate sizes and cavity shapes, and each plate performs different functions. The front-end plate insulation plate 3 is directly attached to the end face of the fuel cell core and in close contact with the front current collector plate 4. The plate surface is machined with a groove that perfectly matches the shape of the current collector plate. The depth of the groove is the same as the thickness of the current collector plate. After the current collector plate is embedded, it can be completely flush with the end face of the fuel cell core 5, which not only restricts the lateral movement of the current collector plate, but also ensures that the conductive surfaces are tightly attached without gaps. The contact surfaces of the front-end plate insulation plate 3 and the front-end plate distribution plate 2 are both machined with corresponding cavity flow channel grooves. Sealing grooves are opened around the contact surfaces of the two plates and sealing strips are embedded. After pressing and sealing, a closed hollow flow channel is formed inside. The original multi-cavity branch port on the plate side can be merged into a conventional six-cavity standard interface according to the gas-liquid function, realizing the adaptation and connection between the multi-cavity plate and the external standard pipeline.

[0037] Both the front-end plate insulation plate 3 and the front-end plate distribution plate 2 are made of high-strength insulating materials. While meeting the structural compressive strength requirements, they can simultaneously achieve electrical insulation between the reactor core and the external metal structure, as well as sealing and isolation between the hydrogen, air, and cooling water channels, thus preventing gas-liquid cross-contamination.

[0038] The front plate bearing plate 1 is made of metal material, and aluminum alloy can be selected for machining according to the usage requirements. It is combined with the front plate insulation plate 3 and the front plate distribution plate 2 through positioning pins and bolt fastening to form the front plate assembly. The front plate bearing plate 1 mainly bears the axial compression load of the integrated package, and evenly transmits the stacking pressure to the inner flow channel plate and the core end face, providing rigid structural support for the whole stack.

[0039] In this embodiment, the tail end of the core 5 is tightly fitted with the rear current collector 4 and the rear insulating plate 6 in sequence. Corresponding to the front end structure, the rear insulating plate 6 also has a groove that matches the shape of the current collector 4 on the side facing the core. After the current collector is embedded, it is flush with the end face of the core 5 to ensure uniform contact of the rear conductive surface. To ensure the insulation performance of the rear end, the rear insulating plate 6 is also made of high-strength insulating material.

[0040] Although the rear insulating plate 6 uses high-strength insulating material, its own strength is still insufficient to withstand the stacking pressure of the fuel cell core 5, making it prone to deformation and cracking due to excessive local stress. Therefore, this solution embeds a metal rear insulating plate bearing plate 7 into the rear insulating plate 6 with an embedded structure. The bearing plate does not directly contact the current collector, maintaining sufficient insulation distance. This structure significantly improves the overall pressure-bearing capacity of the rear assembly without significantly increasing the axial stacking length of the core, thus improving the overall structural compactness of the fuel cell and increasing the volumetric power density.

[0041] In this embodiment, the upper housing 9 adopts a semi-circular structure, enclosing the upper half of the reactor core area. One side is specifically enlarged to accommodate the CVM inspection controller, forming an independent external mounting bay. The inspection controller can be externally mounted on the outside of the housing, with double-ring sealing strips on the mounting surface, arranged around the periphery of the vias and the circumference of the inspection cover, cooperating with the CVM inspection cover 11 to achieve sealing protection. Furthermore, the CVM inspection cover can be installed after the entire reactor stack is assembled, and the inspection cable is connected to the inside of the housing through the reserved vias. Thanks to the structural design of this integrated packaging solution, the inspection connector can also be independently installed and removed after the reactor stack is assembled through the reserved mounting position on the side of the upper housing 9. After-sales repairs can be performed by simply removing the inspection cover without disassembling the entire housing, making maintenance convenient.

[0042] The lower housing 10 is designed to fit the upper housing 9 and bear the weight of the lower half of the reactor core. The two housings are connected by bolt holes at the slotted positions of the side flanges. The type of connecting bolts is selected based on the assembly force requirements of the reactor stack and the housing and is evenly distributed along the circumference. Sealing grooves are opened on the mating surfaces of the two housings and sealing strips are installed to ensure the sealing strength and airtightness requirements at the joint of the upper and lower housings.

[0043] This embodiment adopts a split upper and lower housing structure. While meeting the requirements of integrated packaging, it eliminates the need for customized stacking equipment and can use traditional stacking tooling to complete the stacking operation. The specific stacking process is as follows: First, fix the lower housing on the stacking tooling. Use traditional internal positioning rods to complete the alternating stacking of bipolar plates and membrane electrodes. After the core is stacked in place and pre-pressed, remove the positioning rod on one side, fasten the corresponding side of the upper housing, and pre-tighten the bolts. After one side of the housing is fixed, remove the positioning tooling on the other side and repeat the operation to complete the alignment and fastening of the other side of the housing. The entire process does not require modification of the press head structure.

[0044] The upper housing 9 has two rectangular operating holes at the locations where the positive and negative current collectors of the fuel cell stack connect to the copper busbars, for connecting the copper busbars after encapsulation. The copper busbars are pre-fixed to the mounting posts on the inner wall of the housing below the operating holes using insulating bolts, with a connection allowance reserved during pre-installation. After the fuel cell stack is encapsulated, the operator can pass through the operating holes from the outside of the housing and tighten the connecting bolts between the copper busbars and the current collectors to complete the current extraction. After the connection is completed, the positive and negative electrode covers 14 and the copper busbar cover 15 are installed in sequence, and the openings are sealed and insulated with sealing gaskets.

[0045] In this embodiment, shock-absorbing strips 8 are installed at corresponding positions on the inner walls of the upper housing 9 and the lower housing 10. The shock-absorbing strips 8 are adapted to different installation positions to fit the inner wall of the housing and the side profile of the reactor core, ensuring consistent core buffering and limiting functions. An assembly gap is reserved between the reactor core 5 and the inner wall of the housing to prevent scraping of the electrode plates during stacking and facilitate the encapsulation operation. After the housing is encapsulated, hexagonal set screws are screwed in from the outside of the housing. The front end of the screw pushes the shock-absorbing strip towards the reactor core side. Adjusting the screw depth of each screw eliminates the gap between the reactor core and the housing, ensuring uniform force around the reactor core and achieving lateral limiting and anti-loosening. After the hexagonal set screws are screwed in, sealant is filled between the screw head and the threaded hole of the housing to ensure the sealing performance of the opening at the side wall of the housing.

[0046] In this embodiment, a circular press operation hole is provided on the rear cover 12 to accommodate the stacking operation. The hole diameter is large enough for conventional stacking blocks to pass through. The stacking equipment can directly and evenly transfer pressure to the rear pressure plate of the fuel cell core by passing a simple press block through the rear cover 12. After the fuel cell core is pressed into place as required and the press pressure remains constant, the upper housing 9 and lower housing 10 are first circumferentially sealed and fixed to the rear cover. A sealing strip is set on the mating surface to achieve an external seal. Multiple threaded holes are evenly machined on the end face of the rear cover 12. The hexagonal set screws are screwed in gradually through these threaded holes, and the front end evenly presses against the entire surface of the rear insulating plate pressure plate, gradually bearing the core pressing force until the load shown by the press is completely transferred to the set screws. At this time, the stacking blocks can be removed. Finally, the rear cover sealing cover 13 is installed to seal the press operation hole, and the overall seal is completed with the sealing gasket. This multi-point uniform pressing structure can effectively improve the problem of insufficient force in the central area of ​​the wide electrode plate.

[0047] In this implementation scheme, all functional components adopt a modular design, which can be independently disassembled and replaced, under the premise of meeting the encapsulation performance requirements. This allows them to adapt to fuel cell bipolar plate schemes of different specifications and cavity layouts. For new plate schemes, only the flow channel shape of the front end plate, the length and width of the box and the matching simple tooling need to be adjusted accordingly to quickly complete the encapsulation scheme adaptation. There is no need to redesign the entire encapsulation structure, which has strong versatility.

[0048] The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An integrated packaging structure for a high-power fuel cell, characterized in that, The encapsulation structure mainly consists of a front-end board assembly, a core (5), a rear-end pressure-bearing assembly, upper and lower irregular-shaped boxes, a CVM inspection assembly, and a rear box cover clamping assembly; The front end plate assembly is located at the front end of the reactor core; the rear end pressure-bearing assembly is located at the rear end of the reactor core; the upper and lower irregular-shaped boxes are composed of an upper box (9) and a lower box (10), wherein the upper box and the lower box together form an accommodating cavity and enclose the reactor core body, the inner wall of the upper and lower irregular-shaped boxes is provided with shock-absorbing strips (8), and the side walls are fitted with hexagonal set screws to realize the lateral positioning and gap adjustment of the reactor core; the rear box cover pressing assembly is composed of a rear insulating plate pressure plate (7), a rear box cover (12) and a rear box cover sealing cover (13); The front end plate assembly is formed by stacking and sealing the front end plate pressure plate (1), the front end plate distribution plate (2), and the front end plate insulation plate (3). The front end plate insulation plate (3), the front end plate distribution plate (2), and the front end plate pressure plate (1) are arranged sequentially from the inside to the outside at the front end of the core (5). The front-end board assembly integrates a cavity design with one inlet and two outlets for hydrogen, one inlet and two outlets for air, and two inlets and two outlets for cooling water, and distributes and merges to achieve a total of six flow channels for hydrogen, air, and cooling water.

2. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The upper box has a reserved mounting position for an external CVM inspection unit on the side, which can be used with the CVM inspection cover to enable external maintenance; the rear box cover integrates the load-bearing and clamping function of the original independent rear end plate, with hexagonal set screws evenly distributed on the end face and reserved press operation holes.

3. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The rear end adopts a composite pressure-bearing structure with an insulating plate embedded with a metal pressure-bearing plate.

4. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The upper box features a staggered, pre-installed external CVM inspection structure on the side, paired with a removable inspection cover with double-ring sealing.

5. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The first and last ends of the reactor core (5) are tightly fitted with the rear current collector plate (4) and the rear insulation plate (6) in sequence; the front current collector plate (4) is provided between the front end plate assembly and the reactor core (5); the rear insulation plate (6) is provided between the rear box cover clamping assembly and the reactor core (5).

6. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The upper housing (9) is provided with positive and negative electrode covers (14) and copper busbar cover (15).

7. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The lower housing (10) is also equipped with a CVM inspection cover (11).

8. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The upper and lower irregularly shaped boxes are designed with an upper and lower split irregularly shaped staggered structure.

9. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The core (5) includes a plate and a membrane electrode, and the plate and membrane electrode have reserved internal positioning holes.

10. The integrated packaging structure for a high-power fuel cell as described in claim 1, characterized in that, The front end plate insulation plate (3) is provided with a hydrogen inlet (102), a first hydrogen outlet (103), a second hydrogen outlet (104); a first cooling water inlet (202), a second cooling water inlet (203), a first cooling water outlet (204), a second cooling water outlet (205), an air inlet (302), a first air outlet (303), and a second air outlet (304); which are combined into a hydrogen inlet (101), a hydrogen outlet (105), a cooling water inlet (201), a cooling water outlet (206), an air inlet (301), and an air outlet (305) on the front end plate pressure plate (1).

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