Packaging assembly, fuel cell module, assembling structure comprising packaging assembly, and assembling method for fuel cell module

Abstract

A packaging assembly, a fuel cell module, an assembling structure comprising the packaging assembly, and an assembling method for the fuel cell module. The packaging assembly comprises a case and a plurality of insulating supporting members arranged in the case; the plurality of insulating supporting members are distributed at intervals and arranged between the case and a fuel cell stack of a fuel cell module, the plurality of insulating supporting members are at least distributed on side surfaces of the fuel cell stack and can support the side surfaces of the fuel cell stack and resist inter-layer sliding of the fuel cell stack, and the plurality of insulating supporting members achieve full coating of the fuel cell stack in all directions, thereby achieving the full-coating anti-sliding effect of a stack core, so that the middle collapse of the fuel cell stack can be prevented, thus improving the consistency of the high-power fuel cell stack during use. The insulating supporting members located on two adjacent side surfaces of the fuel cell stack are provided with through grooves running through in the stacking direction of the fuel cell stack, the openings of the through grooves face the fuel cell stack, the through grooves can be used for installing and fixing positioning rods used during assembling of the fuel cell stack, and the positioning rods can improve the assembling precision of the fuel cell stack, thus improving the consistency of high-power fuel cell stacks during assembling.

Description

Packaging assembly, fuel cell module, and assembly structure and assembly method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410333831.4 filed on March 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of fuel cell technology, and specifically relates to a packaging component, a fuel cell module, and an assembly structure and assembly method thereof. Background Art

[0004] Fuel cell stacks are composed of multiple cells connected in series, with components such as collector plates, insulation plates, intake end plates, and blind end plates distributed at both ends. These require a certain amount of press-fitting force to be applied by packaging components such as tie rods, steel strips, and screws, or by using a monolithic package, where the outer casing provides the press-fitting force. Monolithic packaging offers numerous advantages, including reducing the number and variety of stack components, simplifying assembly, improving production efficiency, and enhancing stack reliability. It has gradually become the mainstream packaging technology for fuel cell stacks.

[0005] In recent years, with the acceleration of fuel cell commercialization and the clear trend toward higher power, the need to increase the number of cells in the fuel cell stack has led to a simultaneous increase in fuel cell stack size, resulting in reduced stack consistency during use. Many factors affect stack consistency, including manufacturing variations in components such as membrane electrode and bipolar plates, and the uniformity of fluid distribution in the bipolar plate flow channels. Among these, stack assembly accuracy has a significant impact on stack consistency. Generally, higher alignment accuracy results in better stack consistency.

[0006] Since the consistency of the fuel cell stack will affect its durability, how to improve the consistency of the fuel cell stack has gradually become the focus of the industry.

[0007] Summary of the Invention

[0008] In order to improve the consistency of the fuel cell stack, the present application provides a packaging assembly, a fuel cell module, and an assembly structure and assembly method thereof.

[0009] In a first aspect of the present application, a packaging assembly is provided for use with a fuel cell, comprising a shell and a plurality of insulating support members arranged in the shell, wherein the plurality of insulating support members are distributed at intervals and arranged between the shell and the fuel cell module stack, and the plurality of insulating support members are distributed at least on each side of the stack and are in contact with each component of the stack; the insulating support members located on two adjacent sides of the stack are provided with through grooves that pass through the stack in the stacking direction, and the notches of the through grooves face the stack.

[0010] In some optimized technical solutions, the housing includes:

[0011] a frame having an air intake port and a blind port;

[0012] An air intake side plate connected to the frame and covering the air intake port;

[0013] The blind end side plate is connected to the frame and covers the blind end port.

[0014] In some optimized technical solutions, at least one side of the frame is provided with an opening, and the shell further includes at least one side panel connected to the frame and covering the opening.

[0015] In some optimized technical solutions, the packaging assembly also includes two or more cross beams, which are spaced apart and located between the blind end plate assembly and the blind end side plate of the fuel cell stack, and opposite to one of the opening positions; the shell applies a fastening force along the stacking direction to the fuel cell stack through the cross beams.

[0016] In some optimized technical solutions, the plurality of insulating support members are distributed on each side and each corner of the fuel cell stack.

[0017] In some optimized technical solutions, the inner surface of the shell is provided with one or more local convex surfaces for contacting the insulating support member and / or the positioning rod.

[0018] In a second aspect of the present application, a fuel cell module is provided, comprising a fuel cell stack, a high-voltage component, a low-voltage component and a packaging component of the first aspect above, wherein the high-voltage component and the low-voltage component are both mounted in the shell; the fuel cell stack is encapsulated in the inner cavity of the shell of the packaging component, and the shell applies a fastening force along the stacking direction to the fuel cell stack; or, the air intake end plate of the fuel cell stack is connected to one side of the shell to form one of the end plates of the shell, and the air intake end plate and the shell jointly apply a fastening force along the stacking direction to the fuel cell stack.

[0019] In the third aspect of the present application, an assembly structure is provided for use in a fuel cell, comprising the packaging assembly of the first aspect and four or more positioning rods, at least two of the positioning rods extending into the through grooves of the insulating support member; along the stacking direction of the fuel cell stack, the length of each positioning rod is not less than the sum of the length of the shell and the height difference Δh of the fuel cell stack before and after pressing.

[0020] In some embodiments, the thickness H1 of the positioning rod located in the through slot is not greater than the depth H2 of the through slot; and the width L1 is less than the width L2 of the through slot.

[0021] In some embodiments, a thickness H1 of the positioning rod located in the through slot is smaller than a depth H2 of the through slot.

[0022] In some embodiments, the assembly structure further includes a positioning rod fixing bracket, which connects the housing and the positioning rod so that an end surface of the positioning rod facing the fuel cell stack protrudes outside the through slot.

[0023] In some embodiments, the assembly structure further includes a contoured tooling, and an outer envelope surface or an inner envelope surface of the contoured tooling is the same as an outer contour of the core of the fuel cell stack.

[0024] In some embodiments, a thickness H4 of the positioning rod located outside the through slot is not greater than a thickness H3 of the insulating support member located on the same side.

[0025] In some embodiments, the inner surface of the shell is provided with a local convex surface corresponding one-to-one to the positioning rod located outside the through slot; the width L4 of the positioning rod located outside the through slot is not less than the width of the corresponding local convex surface.

[0026] In a fourth aspect of the present application, a method for assembling a fuel cell module is provided. The method is implemented based on the assembly structure of the third aspect and includes the following steps:

[0027] A plurality of insulating support members are placed in the inner cavity of the shell along two adjacent side surfaces of the shell at intervals, wherein at least two of the insulating support members are provided with the through slots, and the at least two insulating support members provided with the through slots are distributed on different side surfaces of the shell;

[0028] placing a portion of the components of the battery stack into the inner cavity;

[0029] The four or more positioning rods are placed in the inner cavity at intervals along each side surface of the shell, and at least two of the positioning rods extend into the corresponding through slots;

[0030] stacking other components of the battery stack in sequence in the area of ​​the inner cavity surrounded by the four or more positioning rods;

[0031] Compressing the blind end plate assembly of the stack by a press to press the stack to a set height;

[0032] placing the remaining insulating support members in the inner cavity of the shell at intervals along the other two adjacent side surfaces of the shell;

[0033] Remove all the positioning rods;

[0034] The high-pressure component and the low-pressure component of the fuel cell module are installed, and the shell is packaged to complete the assembly of the fuel cell module.

[0035] In some optimized technical solutions, after the fuel cell stack is pressed to a set height, the fuel cell assembly method further includes: placing two or more cross beams on the blind end plate assembly of the fuel cell stack, with the ends of the cross beams extending between the blind end plate assembly and the shell; and withdrawing the press.

[0036] In some optimized technical solutions, after the four or more positioning rods are placed in the inner cavity at intervals along the side surfaces of the shell, and at least two of the positioning rods extend into the corresponding through grooves, the fuel cell assembly method further includes: adjusting the positions of the positioning rods so that the end faces of the positioning rods in the through grooves facing the fuel cell stack protrude outside the through grooves, and the areas enclosed by the positioning rods completely match the outer contour of the core of the fuel cell stack.

[0037] The packaging assembly provided according to one or more embodiments of the present application has the following beneficial effects:

[0038] 1) The packaging assembly provided in the present application provides a plurality of insulating supports between the shell and the fuel cell stack. The plurality of insulating supports are distributed at least on each side of the fuel cell stack and are in contact with each component of the fuel cell stack. They can support the sides of the fuel cell stack and resist interlayer slippage of the fuel cell stack. The plurality of insulating supports fully cover the fuel cell stack from all directions, achieving a full core coverage and anti-slip effect, which can prevent the collapse of the fuel cell stack and thereby improve the consistency of the high-power fuel cell stack during use.

[0039] 2) In the packaging assembly provided in the present application, the insulating support member is a component independent of the shell and the battery stack. Compared with the anti-collapse structure in which the shell is directly pressed against the battery stack, multiple independent insulating support members are easier to install and the battery stack assembly is less difficult.

[0040] 3) In the packaging assembly provided by the present application, the insulating support members located on two adjacent sides of the battery stack are provided with a through groove that runs through the stacking direction of the battery stack, and the notch of the through groove faces the battery stack. The provision of the through groove reduces the contact surface area between the insulating support member and the battery stack. After the insulating support member is manufactured, only the contact surface needs to be fine-machined, which facilitates the realization of high flatness in a limited area and improves the surface quality of the contact surface with the battery stack. On the other hand, the through groove can also be used to install the positioning rod used when fixing the battery stack, thereby ensuring that the positioning rod used when the battery stack is assembled does not require additional positioning rod fixing tooling, reducing the number of tooling parts and facilitating operation. The positioning rod can improve the assembly accuracy of the battery stack, thereby improving the consistency of the high-power battery stack during the assembly process. In addition, the through groove can also be used as an airflow channel to improve the purging effect of the battery stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] FIG1 shows a schematic structural diagram of a packaging assembly in one or more embodiments of the present application.

[0043] FIG. 2 shows an exploded view of the package assembly of FIG. 1 .

[0044] FIG. 3 shows a side view of a corner support member in the packaging assembly of FIG. 1 .

[0045] FIG. 4 shows a first structural diagram of a corner support member in the packaging assembly of FIG. 1 .

[0046] FIG5 shows a second structural schematic diagram of the corner support member in the packaging assembly of FIG1 .

[0047] FIG6 shows a schematic structural diagram of a corner support member of a packaging assembly in some other embodiments of the present application.

[0048] FIG7 is a schematic structural diagram of a side support member of a packaging assembly in some other embodiments of the present application.

[0049] FIG8 shows a schematic structural diagram of a fuel cell module in one or more embodiments of the present application.

[0050] FIG. 9 shows an exploded view of the fuel cell module of FIG. 8 .

[0051] FIG. 10 shows a top view of the fuel cell module of FIG. 8 .

[0052] FIG11 shows a front view of the fuel cell module of FIG8 with the cover removed.

[0053] FIG12 shows a cross-sectional view taken along line AA of the fuel cell module of FIG11 .

[0054] FIG. 13 shows a partial enlarged view of point B in FIG. 12 .

[0055] FIG. 14 shows a partial enlarged view of point C in FIG. 12 .

[0056] FIG. 15 shows a partial enlarged view of point D in FIG. 12 .

[0057] FIG16 shows an EE cross-sectional view of the fuel cell module of FIG11 .

[0058] FIG. 17 shows a partial enlarged view of point F in FIG. 16 .

[0059] FIG18 shows a partial enlarged view of point G in FIG16 .

[0060] FIG19 shows a schematic structural diagram of a fuel cell module in other embodiments of the present application.

[0061] FIG. 20 shows an exploded view of the fuel cell module of FIG. 19 .

[0062] FIG. 21 shows a left side view of the fuel cell module of FIG. 19 .

[0063] FIG22 shows a first structural diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0064] FIG23 shows a front view of the fuel cell module of FIG22.

[0065] FIG. 24 shows a cross-sectional view taken along line AA of the fuel cell module of FIG. 23 .

[0066] FIG. 25 shows a partial enlarged view of point C in FIG. 24 .

[0067] FIG. 26 shows a partial enlarged view of point D in FIG. 24 .

[0068] FIG27 shows a second structural schematic diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0069] FIG28 shows a third structural schematic diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0070] FIG29 shows a fourth structural diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0071] FIG30 shows a fifth structural diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0072] FIG31 shows a sixth structural diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0073] FIG32 shows a seventh structural diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0074] FIG33 shows a structural schematic diagram eight of a fuel cell module during assembly in one or more embodiments of the present application.

[0075] FIG34 shows a front view of the fuel cell module of FIG32.

[0076] FIG35 shows an AA cross-sectional view of the fuel cell module of FIG34 .

[0077] FIG36 shows a schematic structural diagram of a fuel cell module after assembly in one or more embodiments of the present application.

[0078] FIG37 shows a ninth structural diagram of a fuel cell module during assembly in one or more embodiments of the present application.

[0079] FIG38 shows a front view of the fuel cell module of FIG37 .

[0080] Description of reference numerals:

[0081] 1000 - Fuel cell module; 1100 - Packaging assembly. 11 - Insulation support, 11a - Side support, 11b - Corner support; 12 - Through slot; 13 - Raised ridge; 14 - Purge channel; 15 - Avoidance zone; 16 - Recess, 17 - Concave-convex structure. 20 - Crossbeam. 30 - Positioning rod, 31 - Positioning rod in the through slot, 32 - Positioning rod outside the through slot; 40 - Shock absorber column; 50 - Positioning rod fixing bracket; 60 - Contoured tooling.

[0082] 100-shell, 101-partial outer convex surface, 102-air inlet port, 103-blind port, 104-operation port, 105-high-pressure mounting hole, 106-upper opening, 107-side opening, 108-low-pressure mounting hole, 109-cavity; 110-frame, 111-outer convex part, 112-longitudinal beam, 113-boss, 114-purge inlet, 115-purge outlet, 116-drain outlet, 117-bending structure; 120-blind end side plate, 121-limiting column, 122-mounting platform; 130-upper cover, 131-protruding part of the upper cover; 140-side cover, 141-protruding part of the side cover; 150-high-pressure operation cover; 160-mounting support foot; 170-air inlet side plate; 180-cover body.

[0083] 200 - Fuel cell stack; 210 - Inlet end plate, 211 - Mounting slot; 230 - Inlet collector plate, 231 - First terminal lug; 240 - Core; 250 - Blind-end collector plate, 251 - Second terminal lug; 260 - Blind-end insulation plate; 270 - Blind-end end plate assembly, 271 - Blind-end end plate, 272 - Disc spring support plate, 273 - Disc spring, 274 - Limiting slot, 275 - Limiting protrusion. 300 - High-voltage assembly; 311 - First copper busbar, 312 - Second copper busbar; 320 - Through terminal; 330 - Nut; 340 - High-voltage bolt. DETAILED DESCRIPTION

[0084] In order to enable those skilled in the art to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0085] A fuel cell stack consists of multiple alternating membrane electrode and bipolar plates, with seals installed between them. Insulator plates, current collectors, and stack end plates are located at both ends of the core formed by the membrane electrode and bipolar plates to isolate high voltage, collect output energy, and provide tightening force. The stack end plates are fastened together using strapping, tie rods, screws, and other fastening mechanisms, or by a housing providing press-fitting force. Under the action of catalysts on the cathode and anode sides of the proton exchange membrane inside the membrane electrode, the cathode and anode reaction media undergo an electrochemical reaction, converting chemical energy into electrical energy.

[0086] In a certain fuel cell, the end closest to the reaction medium input is defined as the inlet end, and the end furthest from the reaction medium input is defined as the blind end. Accordingly, the end plate at the inlet end of the fuel cell stack is defined as the inlet end plate, and the end plate at the blind end is defined as the blind end end plate. In a conventional fuel cell stack, the inlet end plate, the inlet end insulation plate, the inlet end current collector, the core, the blind end current collector, the blind end insulation plate, and the blind end end plate are stacked in sequence. The direction in which the components of the fuel cell stack are stacked is defined as the stacking direction.

[0087] The specific definitions of the concepts such as "air inlet end", "blind end" and "stacking direction" in this application are as described above. For the convenience of expression, the abbreviations of the definitions are used in the following embodiments.

[0088] In a first embodiment of the present application, a packaging assembly 1100 is provided. The packaging assembly 1100 is applied to a fuel cell module 1000 and serves as an external packaging box of the fuel cell module 1000 .

[0089] Referring to Figures 1 and 2 , the overall structure and exploded view of package assembly 1100 are shown. Package assembly 1100 includes an insulating support assembly 10 and a housing 100 for mounting a stack 200. The insulating support assembly 10 is positioned between the housing 100 and the stack 200. The insulating support assembly 10 contacts all components of the stack 200, supporting the sides of the stack 200 and preventing inter-layer slippage.

[0090] The insulating support assembly 10 includes a plurality of insulating support members 11 spaced apart. The insulating support members 11 have a certain rigidity, and at least the surface of the outer surface thereof that contacts the battery stack 200 and the shell 100 is made of insulating material. For example, the insulating support member 11 can be made of plastic with good rigidity, or the insulating support member 11 can be made of metal, with an insulating layer attached to its outer surface. The material of the insulating support member 11 must meet the requirements of high hardness, high strength, high insulation, and low moisture absorption. The insulating support member 11 is a component independent of the shell 100 and the battery stack 200. Compared with the anti-collapse structure in which the shell 100 is directly pressed against the battery stack 200, the independent multiple insulating support members 11 are more convenient to install, and the assembly difficulty of the battery stack 200 is low. The insulating support assembly 10 is in direct contact with the battery stack 200. On the one hand, it plays an insulating role due to its own material. On the other hand, it realizes the transmission and transfer of external excitation by a single part. When external vibration and impact excitation act on the battery stack 200, it can be transferred to the shell 100 through the insulating support member 11 that is fully covered on all sides.

[0091] Multiple insulating support members 11 are distributed at least on each side of the stack 200. That is, the number of insulating support members 11 is sufficient to provide one insulating support member 11 on each side of the stack 200. The multiple insulating support members 11 can fully cover the stack 200 from all directions, achieving a fully covered and anti-slip effect on the core 240. In some embodiments, in addition to providing one insulating support member 11 on each side of the stack 200, the insulating support members 11 can also be arranged at at least one corner of the stack 200, for example, one insulating support member 11 is arranged at each corner. The insulating support members 11 distributed at the corners of the stack 200 are in contact with two adjacent sides of the stack 200 at the same time.

[0092] Taking a rectangular bipolar plate with two sides of different lengths as an example, the number of insulating support members 11 can be four, and the four insulating support members 11 are respectively arranged on the four sides of the stack 200; the number of insulating support members 11 can be six, of which four insulating support members 11 are respectively arranged on the four sides of the stack 200, and the remaining two insulating support members 11 can be respectively arranged at two opposing corners of the stack 200; the number of insulating support members 11 can be eight, of which four insulating support members 11 are respectively arranged at the four corners of the stack 200, and the remaining four insulating support members 11 can be respectively arranged on the long side and short side of the stack 200. For convenience of description, the insulating support members 11 distributed at the corners of the stack 200 are referred to as corner support members 11b, and the insulating support members 11 distributed on the sides of the stack 200 are referred to as side support members 11a.

[0093] Referring to FIG. 2 , in some embodiments, the packaging assembly is used to assemble a fuel cell stack 200 including rectangular bipolar plates with two sides of different lengths. The insulating support assembly 10 includes ten insulating support members 11: four corner support members 11b are disposed at the four corners of the fuel cell stack 200, four side support members 11a are distributed in pairs on each long side of the fuel cell stack 200, and the remaining two side support members 11a are distributed one-to-one on each short side of the fuel cell stack 200. In some embodiments, the four side support members 11a located on the two long sides of the fuel cell stack 200 can be positioned one-to-one or staggered along the long sides; the two side support members 11a located on the two short sides of the fuel cell stack 200 can be positioned one-to-one or staggered along the short sides.

[0094] Please refer to Figures 3 to 7 for schematic structural diagrams of insulating support members in various embodiments. In the packaging assembly 1100, the insulating support members 11 located on two adjacent sides of the cell stack 200 are provided with through-slots 12 extending along the stacking direction of the cell stack 200, with the openings of the through-slots 12 facing the cell stack 200. In other words, the side support members 11a located on two adjacent sides of the cell stack 200 in the insulating support assembly 10 are provided with through-slots 12 facing the cell stack 200. The contact surfaces of the two or more side support members 11a with the cell stack 200 are the end surfaces of the groove walls of the through-slots 12, rather than the entire end surfaces of the side support members 11a facing the cell stack 200. This reduces the contact surface area between the insulating support member 11 and the cell stack 200 and does not exceed the projected area of ​​the groove wall end surfaces. After manufacturing, the insulating support member 11 only needs to undergo fine machining on the contact surface, facilitating high flatness within a limited area, improving the surface quality of the contact surface with the cell stack 200, and reducing the overall manufacturing difficulty of the insulating support member 11. Referring to Figures 13, 14, and 15, in some embodiments, a localized convex surface 101 may also be provided at a corresponding location on housing 100. The area of ​​localized convex surface 101 is larger than the required contact area of ​​the corresponding ridge 13. The contact between localized convex surface 101 and the partially machined surface of insulating support 11 ensures the mating accuracy of the contact surface while reducing the machined area of ​​the inner surface of housing 100, facilitating high flatness within a limited area and reducing manufacturing difficulty.

[0095] The through groove 12 can be a groove structure formed by removing a portion of material from the insulating support 11, or it can be a groove structure formed by providing at least two spaced ridges 13 on the surface of the insulating support 11. Referring to Figures 3 to 7, the side of the insulating support 11 facing the battery stack 200 is provided with two parallel ridges 13, and the two ridges 13, the main body of the insulating support 11, and the outer side of the battery stack 200 together form a channel. The channel is conductive along the stacking direction, and can not only serve as an airflow channel, but also be used to install the positioning rod 30 used when the battery stack 200 is stacked, thereby ensuring that the positioning rod 30 used when the battery stack 200 is stacked can be installed using the through groove 12 of the side support 11a, without the need to set up additional positioning rod 30 fixing tooling, reducing the number of tooling parts and facilitating operation.

[0096] In certain embodiments, both ends of the insulating support member 11 are chamfered, and the sharp edges of the chamfers are rounded. The edges of the ridges 13 are also rounded to facilitate the movement of the cells of the core 240 during the press-fitting and disassembly processes, while preventing damage to the cells or the housing 100 during the assembly of the fuel cell stack 200 and preventing scratches on the surface of the cells. In some embodiments, through grooves 12 can be provided on both sides of each insulating support member 11 to form airflow channels between the insulating support member 11 and the housing 100, and between the insulating support member 11 and the fuel cell stack 200, thereby reducing the weight of the insulating support member 11 and the entire fuel cell module 1000.

[0097] Refer to Figures 3 and 7 for schematic diagrams of the structure of side supports 11a in various embodiments. Each side support 11a is provided with two ridges 13, each perpendicular to the side surface of the body on which it is located, resulting in a roughly H-shaped cross-section. Refer to Figures 4, 5, and 6 for schematic diagrams of the structure of corner supports 11b in various embodiments. Corner supports 11b have a roughly L-shaped cross-section, contacting both sides of the corner of the stack 200 and automatically limiting their position along the long and short sides of the bipolar plates. In certain embodiments, refer to Figures 4, 5, and 6, each inner and outer side of corner support 11b is provided with three or more spaced ridges 13, each perpendicular to the side surface of the body on which it is located. The ridges 13 on the outer side of corner support 11b all contact the housing 100.

[0098] In certain embodiments, referring to FIG7 , a concave-convex structure 17 is provided on the insulating support member 11. The concave-convex structure 17 is located on the non-contact surface of the insulating support member 11, that is, the concave-convex structure 17 is located between the stack 200 and the housing 100 and does not contact the stack 200 or the housing 100. Providing the concave-convex structure 17 can increase the creepage clearance, so that the straight-line distance between the stack 200 and the housing 100 can be less than the 20mm creepage clearance requirement, thereby reducing the volume of the fuel cell module 1000 and improving the volumetric power density. The concave-convex structure 17 can be a raised boss 113 and / or a recessed depression on the surface of the insulating support member 11. The specific structural form is not limited in this application.

[0099] In some embodiments, the insulating support member 11 is in full contact with both the fuel cell stack 200 and the housing 100, facilitating the transmission and transfer of external stimuli. This allows two adjacent insulating support members 11, the housing 100, and the fuel cell stack 200 to enclose a cavity 109. Multiple insulating support members 11 divide the annular space between the fuel cell stack 200 and the housing 100 into multiple cavities 109. The fuel cell housing 100 is typically provided with a purge port, as shown in Figures 1, 8, 10, 19, and 21. In some embodiments, the housing 100 is provided with a purge inlet 114, a purge outlet 115, and a drain port 116. The purge inlet 114, purge outlet 115, and drain port 116 can be formed by drilling holes in the housing 100 and then welding the joints. Alternatively, the purge inlet 114, purge outlet 115, and drain port 116 can be integrally formed with the housing 100, with the channels formed by machining. The purge inlet 114, the purge outlet 115, and the drain outlet 116 are all disposed on the housing 100 and communicate with the inner cavity of the housing 100. The corresponding purge inlet 114, the purge outlet 115, and the drain outlet 116 are all communicated with at least one cavity 109. The specific locations of the purge inlet 114, the purge outlet 115, and the drain outlet 116 are not limited in this application.

[0100] In some embodiments, the purge inlet 114 and the purge outlet 115 are respectively located at opposite ends of the shell 100, which can fully purge each cavity 109. The drain outlet 116 is provided at the lowest point of the shell 100, specifically at the bottom surface of the shell 100. The shell 100 is usually provided with mounting legs 160 for mounting the entire fuel cell module 1000 in the vehicle body. The number of mounting legs 160 is at least three, and four is the most common. The mounting legs 160 can be provided at the bottom or top of the shell 100 to achieve bottom-supported or top-hanging installation of the fuel cell module 1000. In some embodiments, the mounting legs 160 are all provided at the bottom of the shell 100, and the drain outlet 116 is provided at the bottom surface of the shell 100 and is located in the space surrounded by more than three mounting legs 160. The height of the end surface of the drain outlet 116 is higher than the height of the bottom surface of the mounting legs 160, so as to effectively utilize the bottom space of the shell 100.

[0101] In certain embodiments, the insulating support member 11 is provided with a purge communication channel for connecting two adjacent cavities 109. By providing the purge communication channel, multiple cavities 109 are sequentially connected, facilitating the flow of purge gas to various areas of the annular space between the fuel cell stack 200 and the housing 100. The purge communication channel can be a hole, a slot, or a notch, and the specific structural form is not limited in this application.

[0102] Referring to Figures 3, 4, and 5, in certain embodiments, the purge communication channel is a clearance area 15 provided at at least one end of the insulating support member 11. The clearance area 15 is used to clear structures on the housing 100. The clearance area 15 is larger than the structure being cleared, and the clearance space not occupied by the structure forms a purge communication channel connecting two adjacent cavities 109. The clearance area 15 is located at an end of the insulating support member 11. It can be a recessed area provided at one end of the insulating support member 11, which does not contact the housing 100, thereby forming a purge communication channel connecting the two cavities 109. Alternatively, the clearance area 15 can be provided at both ends of the insulating support member 11. In some embodiments, the avoidance zone 15 is located on the side of the insulating support 11 close to the shell 100, that is, the side of the insulating support 11 close to the fuel cell stack 200 maintains contact with each component of the fuel cell stack 200 to support the various components of the fuel cell stack 200, and the side of the insulating support 11 close to the shell 100 is in partial contact with the shell 100 to achieve the transmission and transfer of external excitation, and the uncontacted part forms the avoidance zone 15.

[0103] In certain embodiments, the purge communication channel is a plurality of notches 16 provided on the insulating support member 11. Referring to Figures 6 and 7, both sides of the body of the insulating support member 11 are provided with ridges 13 extending in the stacking direction. The ridges 13 are in contact with the housing 100 and the stack 200. The ridges 13 are provided with one or more notches 16 spaced apart from each other, forming a purge communication channel connecting the two cavities 109. The notches 16 can be notches formed by removing part of the material of the ridges 13, or they can be the area between two adjacent ridges 13 when the ridges 13 are configured as a multi-segment structure.

[0104] In some embodiments, multiple insulating support members 11 are distributed on various sides and corners of the battery stack 200, that is, the insulating support assembly 10 includes a corner support member 11b and a side support member 11a, wherein the recess 16 of the side support member 11a and the recess 16 of the corner support member 11b are staggered, and there is a gap h between the recess 16 of the side support member 11a and the recess 16 of the corner support member 11b along the stacking direction. The gap h allows the purge airflow to hit the insulating support member 11 when passing through and be dispersed, thereby increasing the purge area and improving the purge effect.

[0105] In some embodiments, an avoidance area 15 and a recess 16 may be provided on the insulating support 11 as a purge communication channel. The purge communication channel has a larger area, which reduces the flow resistance of the purge airflow when passing through the purge communication channel.

[0106] Referring to Figures 1 and 2, in some embodiments, the housing 100 adopts a split structure, including a frame 110, an air intake end side plate 170, and a blind end side plate 120. The frame 110 is provided with an air intake port 102 and a blind end port 103. The air intake end side plate 170 and the blind end side plate 120 are both connected to the frame 110 and cover the air intake port 102 and the blind end port 103, respectively. The air intake end side plate 170 and the blind end side plate 120 form the two end plates of the housing 100, and the frame 110 forms the four sides of the housing 100. When external vibration or impact excitation acts on the fuel cell stack 200, it can be transferred to the frame 110 through the insulating support member 11 that fully covers all sides. In some embodiments, the fuel cell stack 200 is partially encapsulated in the inner cavity of the housing 100. Specifically, the air intake end plate 210 of the fuel cell stack 200 is connected to the frame 110 to form the air intake end plate 170.

[0107] In some embodiments, at least one side of the frame 110 is provided with an opening. Accordingly, the housing 100 further includes at least one side panel connected to the frame 110 and covering the opening. In certain embodiments, the frame 110 is provided with an upper opening 106 and a side opening 107, respectively. The upper opening 106 and the side opening 107 are located on two adjacent sides of the frame 110.

[0108] Referring to FIG2 , in some embodiments, an upper opening 106 is provided on the upper side of the frame 110, and the housing 100 further includes an upper cover 130, which is connected to the frame 110 and covers the upper opening 106. The ridge 13 of the side support member 11a located on the upper side of the fuel cell stack 200 abuts against the upper cover 130, while the ridges 13 on the outer sides of the remaining side support members 11a all contact the frame 110. In some embodiments, referring to FIG13 , a plurality of protrusions 131 are provided on the lower surface of the upper cover 130. To reduce the mass of the upper cover 130, the protrusions 131 can be configured as a groove structure, wherein the groove wall of the groove structure extends beyond the extension range of the ridge 13 of the side support member 11a located on the upper side of the fuel cell stack 200.

[0109] Referring to FIG2 , in some embodiments, the frame 110 is provided with a side opening 107. Accordingly, the housing 100 further includes a side cover 140 connected to the frame 110 and covering the side opening 107. In some embodiments, referring to FIG2 , the inner surface of the side cover 140 is provided with a plurality of protrusions 141. To reduce the weight of the side cover 140, the protrusions 141 can be configured as groove structures, where the groove walls of the groove structure extend beyond the extension range of the ridges 13 of the side support members 11a located on the corresponding side of the fuel cell stack 200.

[0110] Please refer to Figure 2. In some embodiments, the fuel cell module 1000 further includes two or more crossbeams 20. The two or more crossbeams 20 are spaced apart in the shell 100 and are located at one end (the air inlet end or the blind end) of the fuel cell stack 200. The shell 100 applies a fastening force along the stacking direction to the fuel cell stack 200 through the crossbeams 20. The crossbeams 20 are parallel to the long side or short side of the bipolar plates of the fuel cell stack 200. Both ends of the crossbeams 20 extend into the shell 100 and are restricted by the shell 100 so as not to be displaced, thereby applying a fastening force along the stacking direction to the fuel cell stack 200. Since the two or more crossbeams 20 are spaced apart, a fastening force can be applied to the entire surface of the blind end plate assembly 270, achieving uniform distribution of the press-fitting force, which can effectively reduce the problem of plate deformation caused by large press-fitting force in high-power fuel cell stacks 200.

[0111] Please refer to Figure 16. In some embodiments, in order to improve uniformity, a number of beams 20 are arranged at intervals along the long side direction of the bipolar plate. The number and arrangement position of the beams 20 are comprehensively determined based on factors such as the long side dimension of the blind end plate assembly 270 and the pressing force value of the stack 200. In some embodiments, the number of beams 20 is 3 to 5. The beams 20 can be evenly distributed at equal intervals or unevenly distributed. In some embodiments, the spacing between two adjacent beams 20 located in the middle is less than or equal to the spacing between two adjacent beams 20 located at the edge, so that the distribution of the beams 20 presents a state of being dense in the middle and sparse at both ends. The beams 20 in the middle are relatively dense, which can provide a larger pressing force to the central area of ​​the stack 200. In conjunction with the shell 100 located at the edge of the stack 200, the pressing force can be evenly distributed on the entire end face.

[0112] In some embodiments, the crossbeams 20 are parallel to the short sides of the bipolar plates, the insulating supports 11 are parallel to the stacking direction, and the crossbeams 20 are perpendicular to the insulating supports 11. The crossbeams 20 and the insulating supports 11 can be staggered; the ends of some insulating supports 11 can also be pressed against the corresponding crossbeams 20, thereby reducing the size of the housing 100 in the distribution direction of the crossbeams 20. In some embodiments, the insulating supports 11 are provided with through slots 12 extending along the stacking direction. The through slots 12 are used to install the positioning rods 30 when the battery stack 200 is stacked. In this case, the insulating supports 11 used to install the positioning rods 30 cannot be pressed against the crossbeams 20, otherwise the crossbeams 20 will hinder the installation of the positioning rods 30.

[0113] Referring to FIG. 2 , in some embodiments, the upper surface of the housing 100 is provided with an upper opening 106. The housing 100 also includes an upper cover 130 that covers the upper opening 106. Each crossbeam 20 is positioned opposite the upper opening 106 so that each crossbeam 20 can be inserted into the housing 100 through the upper opening 106. The provision of the opening facilitates the insertion of the crossbeam 20 during assembly.

[0114] In some embodiments, the upper surface of the shell 100 is opposite to the large surface of the battery stack 200 (the side edges are respectively along the long side direction and the stacking direction of the bipolar plates). After the upper opening 106 is opened, the structural strength of the upper surface of the shell 100 will be reduced. In order to improve the strength of the shell 100, please refer to Figure 2. In some embodiments, the upper surface of the shell 100 is provided with one or more longitudinal beams 112, and the one or more longitudinal beams 112 are all located in the upper opening 106. The longitudinal beams 112 are staggered with the cross beams 20, and the cross beams 20 are inserted into the shell 100 from the space in the upper opening 106 not occupied by the longitudinal beams 112.

[0115] Referring to Figure 16 , in some embodiments, the frame 110 is provided with multiple bosses 113 spaced apart along the distribution direction of the crossbeams 20. These bosses 113 are grouped in pairs, with each group of two bosses 113 forming a groove structure. Each crossbeam 20 is sandwiched between two adjacent bosses 113, enabling boltless fixing of the crossbeams 20 while preventing movement of the crossbeams 20 during vibration or impact. The height of the bosses 113 is no greater than the thickness of the crossbeam 20, ensuring that the crossbeam 20 can firmly abut the blind-end endplate assembly 270 of the stack 200.

[0116] Please refer to Figure 2. In some embodiments, the fuel cell module 1000 further includes a plurality of spaced-apart shock-absorbing columns 123. The shock-absorbing columns 123 are located between the housing 100 and the fuel cell stack 200 and are pressed against the fuel cell stack 200. Each shock-absorbing column 123 is staggered with each crossbeam 20. The shock-absorbing columns 123 cooperate with the crossbeam 20 to apply a tightening force along the stacking direction to the fuel cell stack 200. The shock-absorbing columns 123 can exist independently of the fuel cell stack 200 and the housing 100, or they can be fixedly mounted on the housing 100. In some embodiments, the plurality of shock-absorbing columns 123 are connected to the blind-end side plate 120. The blind-end side plate 120 is provided with a plurality of mounting platforms 122. The shock-absorbing columns 123 are mounted on the mounting platforms 122 by screws.

[0117] Please refer to Figures 8, 9, 19 and 20. The second embodiment of the present application provides a fuel cell module 1000. The fuel cell module 1000 is a whole comprising a fuel cell stack 200, a high-voltage assembly 300, a low-voltage assembly (not shown in the figure) and a packaging assembly 1100 of any embodiment of the first aspect mentioned above. The high-voltage assembly 300 generally includes an electrically connected copper busbar assembly and a through terminal 320. The copper busbar assembly is electrically connected to the current collecting plate of the fuel cell stack 200, and the electric energy generated by the fuel cell stack 200 is output by the through terminal 320. The low-voltage assembly is electrically connected to the core 240 of the fuel cell stack 200 to perform voltage inspections on the bipolar plates or single cells. The fuel cell stack 200, the high-voltage assembly 300 and the low-voltage assembly are all mounted and fixed by the housing 100. The fuel cell stack 200 can be completely encapsulated in the inner cavity of the shell 100, and the shell 100 applies a fastening force along the stacking direction to the fuel cell stack 200; the fuel cell stack 200 can also be partially encapsulated in the inner cavity of the shell 100, for example, the air intake end plate 210 of the fuel cell stack 200 is connected to one side of the shell 100 to form one of the end plates of the shell 100, and the air intake end plate 210 and the shell 100 jointly apply a fastening force along the stacking direction to the fuel cell stack 200.

[0118] Please refer to Figure 19. In some embodiments, the outer end surface of the blind end plate assembly 270 of the battery stack 200 is provided with a limiting groove 274. The limiting groove 274 is located in the same position and number as the crossbeam 20. The crossbeams 20 are arranged in the corresponding limiting grooves 274 in a one-to-one correspondence. The limiting grooves 274 further limit the movement of the crossbeam 20 during vibration and impact. The groove depth of the limiting groove 274 is no greater than the thickness of the crossbeam 20, ensuring that the crossbeam 20 can be tightly pressed against the shell 100. In some embodiments, the blind end plate assembly 270 of the battery stack 200 includes a blind end plate 271, a disc spring 273, and a disc spring support plate 272. The disc spring support plate 272 is in contact with the crossbeam 20. The outer surface of the disc spring support plate 272 is provided with a limiting groove 274. The provision of the limiting groove 274 increases the thickness of the disc spring support plate 272 and reduces bending deformation.

[0119] Along a direction perpendicular to the stacking direction (the long side direction or short side direction of the bipolar plates of the stack 200), the insulating support member 11 is fixed between the stack 200 and the frame 110. Along the axial direction of the insulating support member 11, the insulating support member 11 is fixed between the air intake end plate 210 and the blind-end side plate 120. To prevent the insulating support member 11 from moving within the frame 110, please refer to FIG18 . In some embodiments, the air intake end plate 210 of the stack 200 is provided with a plurality of mounting grooves 211, and the blind-end side plate 120 is provided with a plurality of limiting posts 121. One end of the plurality of insulating support members 11 is correspondingly arranged in the plurality of mounting grooves 211, and the other end corresponds to the plurality of limiting posts 121. One end of the insulating support member 11 extends into the mounting groove 211, which limits the insulating support member 11 along the long and short sides of the bipolar plate. The other end of the insulating support member 11 abuts against the limiting post 121 of the blind-end side plate 120, which limits the insulating support member 11 along the stacking direction. This not only allows the insulating support member 11 to be secured without the use of threaded fasteners, but also prevents it from moving when the fuel cell module 1000 is subjected to vibration or impact.

[0120] In some embodiments, a plurality of limiting protrusions are provided on the circumference of the battery stack 200, and at least one insulating support member 11 is clamped between two adjacent limiting protrusions. Since the corner support member 11b can automatically limit itself using its own structure, the limiting protrusions mainly limit the side support member 11a. The limiting protrusions are arranged in pairs, and their number is the same as the number of side support members 11a. The mounting groove 211 limits the end of the side support member 11a, and the limiting protrusion limits the middle of the side support member 11a, further improving the limiting effect of the side support member 11a.

[0121] Referring to Figures 2, 9 and 16, in some embodiments, a protrusion 111 is provided on one side of the shell 100, and the protrusion 111 is located on one of the side surfaces of the shell 100 excluding the two end surfaces of the blind end and the air inlet end. The protrusion 111 is a part of the shell 100 that protrudes outward, and the interior of the protrusion 111 is connected to the inner cavity of the shell 100. When the main body of the shell 100 is a frame 110, the protrusion 111 is provided on one of the vertical side surfaces of the frame 110. The high-voltage assembly 300 of the fuel cell module 1000 is mounted on the protrusion 111, specifically, the copper busbar assembly is located in the protrusion 111, and the through terminal 320 is mounted on the protrusion 111. A high-voltage mounting hole 105 is provided on the top surface of the protrusion 111, and the through terminal 320 is mounted in the high-voltage mounting hole 105. The upper portion of the through terminal 320 extends out of the outer protrusion 111 for connecting to the high-voltage wire harness, and the lower portion of the through terminal 320 extends into the outer protrusion 111 for electrically connecting to the copper busbar of the copper busbar assembly through the high-voltage bolt 340 .

[0122] In some embodiments, the low-voltage component is installed below the protrusion 111, making rational use of the space below the protrusion 111. The low-voltage component can be located entirely or partially outside the housing 100. Referring to Figures 2 and 9, the area below the protrusion 111 on the housing 100 is provided with a low-voltage mounting hole 108, through which the low-voltage component or low-voltage wiring harness passes. Referring to Figures 19 and 20, in certain embodiments, the outer cover of the low-voltage component has a cover 180, which is connected to the housing 100 and encapsulates the low-voltage component.

[0123] Since the high-voltage assembly 300 and the low-voltage assembly are separated by the outer protrusion 111, on the one hand, since the housing 100 is usually made of metal material, the outer protrusion 111 can effectively achieve electromagnetic shielding of high and low voltages; on the other hand, since the through-terminal 320 is directly installed on the frame 110, the intake end plate 210 of the fuel cell stack 200 is also connected to the frame 110, and the through-terminal 320 and the current collecting plate connected to the high-voltage copper busbar are both installed with the frame 110 as the installation reference. Therefore, the high-voltage assembly 300 does not require the help of other tooling structures when installing, and the assembly operation is simple. In addition, since the copper busbar assembly is located in the outer protrusion 111, the bottom plate of the outer protrusion 111 can also prevent the high-voltage bolt 340 from falling into the inner cavity of the housing 100.

[0124] Since the low-voltage assembly and the high-voltage assembly 300 are located on the same side, they can be arranged on either the long side or the short side of the housing 100. Referring to Figures 1, 19, and 21, in some embodiments, the low-voltage assembly and the high-voltage assembly 300 are both arranged on the short side of the housing 100. Compared to arranging them on the long side, arranging them on the short side provides a higher degree of integration, which can reduce the volume of the fuel cell module 1000 and improve its integration.

[0125] Referring to Figures 19 and 21, in some embodiments, the top surface of the outer protrusion 111 is lower than the top surface of the main body of the shell 100, so that two bent structures 117 are formed at the connection between the outer protrusion 111 and the main body of the shell 100. In the insulating support member 11 located on the side where the low-voltage component and the high-voltage component 300 are located, one of the corner support members 11b and one of the side support members 11a are respectively in contact with the two bent structures 117. By providing the two bent structures 117 formed by the outer protrusion 111 to press against the insulating support member 11, it is possible to avoid the situation where the insulating support member 11 cannot be provided due to the increase in the distance between the battery stack 200 and the shell 100 caused by the installation of the high-voltage component 300. Furthermore, since the top surface of the outer protrusion 111 is sunken, the purge outlet 115 can be set above the outer protrusion 111, utilizing the space formed by the sinking top surface of the outer protrusion 111. Moreover, since the purge outlet 115 is close to the high-voltage component 300, the outlet guiding effect can be utilized to make the purge airflow flow entirely to the high-voltage component 300, blowing away the water vapor inside the outer protrusion 111, avoiding electrical conduction caused by water vapor, and improving the safety of the fuel cell module 1000.

[0126] Referring to Figures 2, 9, and 20, in some embodiments, an access opening 104 is provided on the outer protrusion 111, through which the connection between the copper busbar assembly and the current collecting plate and / or the through-terminal 320 is exposed. The housing 100 further includes a high-voltage operation cover 150, which is connected to the outer protrusion 111 and covers the access opening 104. The provision of the access opening 104 facilitates the installation of the high-voltage bolt 340.

[0127] Referring to Figures 2 and 20 , in some embodiments, the connection between the copper busbar assembly and the current collector plate, as well as the connection between the copper busbar assembly and the through-terminal 320, are exposed to the outside through the access port 104. High-pressure bolts 340 at both ends of the copper busbar assembly can be installed and operated through the access port 104. In some embodiments, the tabs of the current collector plate are bent, and the copper busbar of the copper busbar assembly is a straight copper busbar. One end of the copper busbar is aligned with the bent portion of the tab, and the other end is aligned with the butt joint of the through-terminal 320. Both ends are locked with high-pressure bolts 340.

[0128] At the two connecting ends of the copper busbar, at least one of the copper busbar and the mating part is provided with a threaded hole, and the other can have a through hole or also a threaded hole. When the copper busbar, the tab, and the mating part are relatively thin, the effective thread length is short, which may cause the bolts to slip when tightened. To this end, in some embodiments, a nut 330 is provided on the copper busbar and / or the current collecting plate of the copper busbar assembly. The nut 330 is installed and fixed by punch riveting or press riveting, which can increase the effective thread length and improve the reliability of the copper busbar connection.

[0129] A third embodiment of the present application provides an assembly structure for assembling the fuel cell module 1000 of the second aspect described above. Referring to Figures 22, 23, and 24, the assembly structure includes a packaging assembly 1100 according to any embodiment of the first aspect described above and a plurality of positioning rods 30. The number of positioning rods 30 is four or more, ensuring that at least one positioning rod 30 is provided on each side of the fuel cell stack 200. The positioning rods 30 are generally arranged along the stacking direction of the fuel cell stack 200. The length of each positioning rod 30 is no less than the sum of the length of the housing 100 and the height difference Δh between the fuel cell stack 200 before and after press-fitting. At least two of the positioning rods 30 extend into the through-slots 12 of the insulating support member 11, specifically, into the through-slots 12 of the side support members 11a located on two adjacent sides of the fuel cell stack 200. That is, some positioning rods 30 are located within the through-slots 12 and secured by the side support members 11a; the remaining positioning rods 30 are located outside the through-slots 12 and directly between the fuel cell stack 200 and the housing 100.

[0130] It should be known that the various components of the assembly structure of the present application are not required to be used simultaneously during the assembly process of the battery stack 200, and different components can be used according to the assembly process of the battery stack 200. For example, in the initial stage of assembly of the battery stack 200, the insulating support members 11 are only installed on two adjacent sides of the battery stack 200, and the remaining insulating support members 11 are installed after the various parts of the battery stack 200 are stacked. In other words, the assembly structure of the present application should at least include a frame 110, an air intake end side plate 170 (the air intake end plate 230 can also be directly used as the air intake end side plate 170), two or more insulating support members 11 arranged on two adjacent sides of the battery stack 200, and four or more positioning rods 30 distributed on each side of the battery stack 200.

[0131] Referring to Figure 25 , in some embodiments, the thickness H1 of the positioning rod 31 within the through-slot 12 is no greater than the depth H2 of the through-slot 12, and the width L1 of the positioning rod 31 within the through-slot 12 is less than the width L2 of the through-slot 12. This prevents lateral slippage of the battery stack 200 during assembly, which could compress the positioning rod 30 and render it impossible to remove. In some embodiments, the thickness H4 of the positioning rod 32 outside the through-slot 12 is no greater than the thickness H3 of the insulating support member 11 located on the same side. This allows for the transfer of lateral slippage and compressive forces from the positioning rod 32 to the insulating support member 11 located on the same side during assembly.

[0132] Please refer to Figure 26. In some embodiments, the inner surface of the shell 100 is provided with a local outer convex surface 101 corresponding one-to-one to the positioning rod 32 located outside the through slot 12; the width L4 of the positioning rod 32 located outside the through slot 12 is not less than the width L5 of the corresponding local outer convex surface 101, so as to avoid the local outer convex surface 101 affecting the disassembly of the positioning rod 32 located outside the through slot 12.

[0133] In some embodiments, the thickness H1 of the positioning rod 31 located in the through slot 12 is less than the depth H2 of the through slot 12, and the width L1 of the positioning rod 31 located in the through slot 12 is less than the width L2 of the through slot 12, to prevent the stack 200 from sliding sideways during assembly, squeezing the positioning rod 30, and making the positioning rod 30 unable to be disassembled. However, since the thickness H1 of the positioning rod 31 is less than the depth H2 of the through slot 12, after the positioning rod 31 is installed in the through slot, the positioning rod 31 may wobble in the depth direction of the through slot 12, which is not conducive to assembly. In addition, since the insulating support member 11 is only provided on two adjacent side surfaces of the stack 200, the insulating support member 11 serves as the assembly base for the corresponding two side surfaces when the stack 200 is assembled. At least one positioning rod 32 is provided on the other two adjacent sides of the fuel cell stack 200. The positioning rod 32 serves as the assembly basis for the two corresponding sides when the fuel cell stack 200 is assembled. This will lead to inconsistent assembly basis of the fuel cell stack 200. One of the keys to improving the consistency of the fuel cell stack 200 is to ensure that the core 240 contacts the same part and the same surface as much as possible during the press-fitting process.

[0134] Please refer to Figures 37 and 38. In some embodiments, the assembly structure also includes a positioning rod fixing bracket 50. The positioning rod fixing bracket 50 connects the shell 100 and the positioning rod 30 and is used to assist in fixing the positioning rod 30 so that the end face of the positioning rod 31 located in the through groove 12 facing the battery stack 200 protrudes outside the through groove 12. As a result, when the battery stack 200 is assembled, the assembly base of each side is the positioning rod 30, and the assembly base of the battery stack 200 is consistent. In addition, the positioning rod 30 has a high manufacturing precision as a tooling part, which further ensures the consistency of the battery stack 200 during the assembly process. The structure of the positioning rod fixing bracket 50 can be designed according to its installation position and the structure of the shell 100, and this application does not impose any restrictions. Please refer to Figures 37 and 38. In some embodiments, the positioning rod fixing bracket 50 is installed at the blind end of the shell 100. At the beginning of the assembly of the fuel cell stack 200, the frame 110 is mainly used among the various components of the shell 100. The air inlet port 102 of the frame 110 is blocked by the air inlet end plate 230, and the blind port 103 is open, serving as the assembly entrance for the core 240 of the fuel cell stack 200 and various components at the blind end. The positioning rod fixing bracket 50 is installed at the blind end of the frame 110, and the part of the positioning rod 30 extending outside the blind end 103 of the frame 110 is connected to the positioning rod fixing bracket 50, so that the positioning rod 30 moves slightly toward the center of the frame 110 (to avoid excessive difference between the assembly reference and the use reference, the thickness difference between the positioning rod 30 and the through groove 12, the size of the positioning rod 30 protruding from the through groove 12, and the displacement of the positioning rod usually do not exceed 1 mm, for example 0.1 mm). The positioning rod 31 located in the through groove 12 partially protrudes from the through groove 12, and the area enclosed by each positioning rod 30 is completely consistent with the outer contour of the core 240 of the fuel cell stack 200 and each component of the blind end.

[0135] In some embodiments, the assembly structure further includes a contouring tool 60, the outer or inner envelope surface of which is identical to the outer contour of the core of the stack 200. The positioning rods 30 can also be secured by the contouring tool 60 so that the area enclosed by the positioning rods 30 completely matches the outer contours of the core 240 and the blind-end components of the stack 200. The contouring tool 60 can be used in conjunction with the positioning rod fixing bracket 50. The contouring tool 60 and the positioning rod fixing bracket 50, in conjunction with the positioning rods 30 and the insulating support member 11, ensure that the core 240 contacts the same part and the same surface as much as possible during the press-fitting process of the stack 200. The outer envelope surface of the contoured tooling 60 is the same as the outer contour of the core of the fuel cell stack 200, acting as a fuel cell simulation to facilitate the positioning rod fixing bracket 50 to adjust the position of the positioning rod 30. The contoured tooling 60 is installed at the blind end of the frame 110, within the area surrounded by each positioning rod 30. As shown in Figure 37, each positioning rod 30 can be fixedly connected to the positioning rod fixing bracket 50 after being fitted with the outer envelope surface of the contoured tooling 60.

[0136] In other embodiments, the contouring tooling 60 can also be used independently, with the inner envelope of the contouring tooling 60 being identical to the outer contour of the core of the fuel cell stack 200. The contouring tooling 60 is provided with a plurality of fixing grooves on its inner side. The contouring tooling 60 is sleeved onto the outer sides of the positioning rods 30. Each positioning rod 30 is inserted into a fixing groove and flush with the inner envelope of the contouring tooling 60. The positioning rods 30 are then fixed to the contouring tooling 60.

[0137] The fourth embodiment of the present application provides an assembly method, which uses the assembly structure of the third aspect to assemble the fuel cell module 1000 of the second aspect. The assembly method of the fuel cell module 1000 is described below using the fuel cell module 1000 of a certain embodiment as an example. In the fuel cell module 1000 of this embodiment, the housing 100 includes a frame 110 and a blind end side plate 120. The blind end side plate 120 is connected to the frame 110 and covers the blind ports 103 respectively. The intake end plate 210 of the fuel cell stack 200 is connected to the frame 110 and covers the intake port 102, serving as the intake end side plate 170 of the housing 100. The insulating support assembly 10 includes 10 insulating support members 11: 4 corner support members 11b are respectively arranged at the 4 corners of the fuel cell stack 200, 4 side support members 11a are distributed in pairs on each long side of the fuel cell stack 200, and the remaining 2 side support members 11a are distributed one by one on each short side of the fuel cell stack 200.

[0138] The assembly method of the fuel cell module 1000 includes the following steps:

[0139] S1. Several insulating supports 11 are placed in the inner cavity of the shell 100 along two adjacent side surfaces of the shell 100 at intervals. Among the several insulating supports 11, at least two insulating supports 11 are provided with through grooves 12, and at least two insulating supports 11 provided with through grooves 12 are distributed on different sides of the shell 100.

[0140] In some embodiments, the air intake end plate 210 is first connected to the frame 110 , and the frame 110 is placed on a table with the air intake end plate 210 facing downward, so that the blind port 103 of the frame 110 faces forward.

[0141] Inside the frame 110, a plurality of insulating support members 11 are spaced apart along two adjacent side surfaces of the housing 100. The plurality of insulating support members 11 include both corner support members 11b and side support members 11a. The two adjacent side surfaces include a side surface on the short side of the bipolar plate and a side surface on the long side of the bipolar plate. In certain embodiments, the high-voltage assembly 300 and the low-voltage assembly of the fuel cell module 1000 are arranged on the same side and are both located on the short side of the bipolar plate. The two adjacent side surfaces are the side surface and the bottom surface where the high-voltage assembly 300 and the low-voltage assembly are located. A side support member 11a is placed on the side surface where the high-voltage assembly 300 and the low-voltage assembly are located, two side support members 11a are placed on the bottom surface, and a corner support member 11b is placed at the corner of the two adjacent side surfaces.

[0142] S2. Place some components of the fuel cell stack 200 into the inner cavity.

[0143] Since the inlet end plate 210 of the fuel cell stack 200 is already connected to the frame 110, other components located at the inlet end of the core 240, such as the inlet end insulation plate and the inlet end collector plate 230, can be placed into the inner cavity in this step. In some embodiments, the inlet end plate 210 and the inlet end collector plate 230 are integrally formed, so only the inlet end collector plate 230 needs to be placed. During the placement of these components into the inner cavity, they move downward along the surface of the already placed insulating support member 11 until they are stacked on the inlet end plate 210.

[0144] Part of the components of the battery stack 200 placed in the inner cavity will contact the insulating support member 11 placed in the inner cavity, blocking a portion of the slot 12 of the side support member 11a. In some embodiments, when the side of the intake end plate 210 is provided with a draft angle, only a portion of the side surface of the intake end plate 210 contacts the slot wall of the support member's slot 12. Therefore, installing part of the components of the battery stack 200 can provide a limit point for the subsequent installation of the positioning rod 30.

[0145] S3. Place all positioning rods 30 in the inner cavity along the side surfaces of the housing 100 at intervals, and at least two positioning rods 30 extend into the corresponding through slots 12, as shown in FIG. 22 .

[0146] Because several insulating support members 11 were already placed on two adjacent side surfaces of the inner cavity of the housing 100 before the positioning rods 30 were placed, the positioning rods 30 on these two adjacent side surfaces are inserted into the through-slots 12 of the corresponding side support members 11a. The remaining positioning rods 30 are placed on the remaining two adjacent side surfaces, clearing the installation positions of the insulating support members 11 on the remaining two adjacent side surfaces. The positioning rods 30 inserted into the through-slots 12 are blocked by a portion of the components of the fuel cell stack 200 installed in step S2, and remain stably positioned in the through-slots 12, preventing them from slipping out of the notches of the through-slots 12.

[0147] High-power fuel cell stacks are packaged as a whole. After the stack 200 is stacked and pressed together, there is inevitably a height difference Δh in the stacking direction, as shown in Figure 23. The greater the number of cells in the core 240 of the fuel cell stack 200, the greater the Δh value. Fuel cell assembly requires ensuring not only the assembly accuracy of the cells inside the casing 100 before press-fitting, but also the assembly accuracy of the cells outside the casing before press-fitting. The distance difference between the top of the positioning rod 30 and the top of the casing 100 is greater than the Δh value, thereby ensuring the assembly accuracy of the cells outside the casing before press-fitting.

[0148] In some embodiments, after each positioning rod 30 is in place, the position of the positioning rod 30 needs to be adjusted so that the end surface of the positioning rod 30 in the through slot 12 facing the fuel cell stack 200 protrudes outside the through slot 12. This ensures that the area enclosed by each positioning rod 30 fully matches the outer contours of the core 240 and the blind-end components of the fuel cell stack 200. During assembly of the fuel cell stack 200, the positioning rod 30 serves as the assembly foundation for each side. As a tooling component, the positioning rod 30 is manufactured with high precision, further ensuring the consistency of the fuel cell stack 200 during assembly.

[0149] 37 and 38 , in some embodiments, the position of the positioning rod 30 is adjusted by the positioning rod fixing bracket 50 and / or the contour tooling 60. The specific structure and installation position of the positioning rod fixing bracket 50 and the contour tooling 60 can be referred to the relevant description of the assembly structure of the third aspect above, and will not be repeated here.

[0150] Taking the assembly structure shown in Figures 37 and 38 as an example, the steps for adjusting the position of the positioning rods 30 are described in detail. In this embodiment, the outer envelope of the contoured tooling 60 is identical to the outer contour of the core of the fuel cell stack 200, serving as a fuel cell stack simulant. There are six positioning rods 30 and three insulating support members 11. The specific steps for adjusting the position of the positioning rods 30 are as follows:

[0151] S31) After each positioning rod 30 is placed in place, each positioning rod 30 is pre-tightened by the positioning rod fixing bracket 30, and the positioning rod fixing bracket 30 is pre-tightened and connected to the frame 110 and the positioning rod 30 respectively.

[0152] S32) A contour tool 60 is placed in the area enclosed by each positioning rod 30 . The dimensions of the contour tool 60 are the same as the outer contour dimensions of the core 240 .

[0153] S33) Adjust the position of the positioning rod 30 and the insulating support 11, ensuring that the positioning rod 30 slightly protrudes from the through slot 12 of the insulating support 11, with the excess not exceeding 1 mm. The positioning rod 30 conforms to the outer contour of the contoured tooling 60, as shown in Figure 38. This ensures that during assembly and press-fitting of the stack 200, the outer contact reference surface of each component is the positioning rod 30.

[0154] S34) Tighten the bolts to fix the positions of the positioning rods 30.

[0155] S35) Take out the contour tool 60 and start stacking other components of the battery stack 200.

[0156] S4. Other components of the fuel cell stack 200 are stacked in sequence in the area of ​​the inner cavity surrounded by four or more positioning rods 30 , as shown in FIG. 22 .

[0157] In step S3, positioning rods 30 are installed around the inner cavity of the housing 100. The area enclosed by the positioning rods 30 is the theoretical assembly position of the fuel cell stack 200 in the fuel cell module 1000. The other components of the fuel cell stack 200 are stacked and placed in this area. When the stack is assembled, the height of the fuel cell stack 200 is h1. The top ends of the positioning rods 30 need to be higher than the top surface of the fuel cell stack 200 to ensure that all components of the fuel cell stack 200 are located within the area enclosed by the positioning rods 30.

[0158] S5. Use a press to press the blind-end end plate assembly 270 of the fuel cell stack 200 and press-fit the fuel cell stack 200 to a set height, as shown in FIG27 .

[0159] After the stacking is completed, the press presses the outermost plate at the blind end of the battery stack 200, namely the blind end plate assembly 270. In some embodiments, the blind end plate assembly 270 only includes the blind end plate 271, then the press presses the blind end plate 271 and applies a downward pressing force in the stacking direction; in some embodiments, the blind end plate assembly 270 includes the blind end plate 271, the disc spring 273 and the disc spring support plate 272, then the press presses the disc spring support plate 272 and applies a downward pressing force in the stacking direction. The various components of the stacked battery stack 200 will move downward a certain distance under the pressure of the press, and this downward movement is mainly caused by the compression deformation of the seals between the components. The press presses the battery stack 200 to a set height h2. The height difference Δh of the battery stack 200 before and after pressing is h1-h2, as shown in Figure 23.

[0160] Before the press is removed, the pressure from the press needs to be transferred to the housing 100, which maintains the compression of the stack 200. In some embodiments, a compression member can be installed on the frame 110, which is fixedly connected to the frame 110 and compresses the stack 200, transferring the pressure from the press.

[0161] In some embodiments, the pressure of the press is transferred by two or more beams 20, as shown in FIG. 28 .

[0162] After the press presses the stack 200 to a set height h2, two or more beams 20 are placed on the blind-end endplate assembly 270 of the stack 200, with the ends of the beams 20 inserted between the blind-end endplate assembly 270 and the frame 110, thereby constraining the beams 20 between the blind-end endplate assembly 270 and the frame 110. In some embodiments, the housing 100 has an upper opening 106, through which the beams 20 can be inserted between the blind-end endplate assembly 270 and the frame 110.

[0163] Because the crossbeams 20 are spaced apart and contact all locations on the surface of the blind-end endplate assembly 270, after the press has pressed the fuel cell stack 200 to the set height h2, the distance between the surface of the blind-end endplate assembly 270 in contact with the crossbeam 20 and the surface of the frame 110 in contact with the crossbeam 20 is exactly equal to the thickness of the crossbeam 20. Therefore, the use of several crossbeams 20 can simulate the pressure applied by a press to the fuel cell stack 200. Once the crossbeams 20 are in place, the press can be removed, as shown in Figure 28. Because the crossbeams 20 are spaced apart, the space between them allows the press ram to pass through, without affecting the press assembly operation.

[0164] S6. Place the remaining insulating support members 11 in the inner cavity of the housing 100 along the other two adjacent side surfaces of the housing 100 at intervals.

[0165] In certain embodiments, an upper opening 106 and a side opening 107 are respectively formed on the other two adjacent sides of the frame 110, and the upper opening 106 and the side opening 107 are covered by an upper cover plate 130 and a side cover plate 140. When installing the remaining insulating support members 11, the upper opening 106 and the side opening 107 are both open, so the remaining insulating support members 11 can be installed in the corresponding position through the upper opening 106 and the side opening 107. This can prevent the remaining insulating support members 11 from damaging the core 240 when being inserted downwardly from the blind end break along the stacking direction between the stack 200 and the shell 100. After the insulating support rods on the side are installed, the upper cover plate 130 and the side cover plate 140 can be installed.

[0166] Specifically, in some embodiments, the insulating support member 11 is first installed on the side where the side opening 107 is located, including a side support member 11a and a corner support member 11b, as shown in Figure 29. The two insulating support members 11 are installed through the side opening 107. After the insulating support members 11 are installed in place, the side cover 140 is connected to the frame 110 to cover the side opening 107 and the two insulating support members 11, as shown in Figure 30.

[0167] Then, install the insulating support members 11 on the side where the upper opening 106 is located, including two side support members 11a and one corner support member 11b, as shown in Figure 31. Install the three insulating support members 11 through the upper opening 106. After the insulating support members 11 are in place, connect the upper cover 130 to the frame 110 to cover the upper opening 106 and the three insulating support members 11, as shown in Figures 32, 34, and 35.

[0168] S7. Take out all the positioning rods 30, as shown in FIG33 .

[0169] In some embodiments, the thickness H1 of the positioning rod 31 located in the through slot 12 is not greater than the depth H2 of the through slot 12, and the width L1 is less than the width L2 of the through slot 12, as shown in Figure 25, and the thickness H4 of the positioning rod 32 located outside the through slot 12 is not greater than the thickness H3 of the insulating support 11 located on the same side. Therefore, when all the insulating support members 11 are installed in place, each insulating support member 11 presses against each side of the battery stack 200, and there will be no situation where the positioning rod 30 is squeezed due to lateral slippage during the assembly process of the battery stack 200, making it easy to disassemble the positioning rod 30.

[0170] Because the positioning rods 30 are removed only after all insulating support members 11 are installed, the sides of the stack 200 are always restrained by the insulating support members 11 and the positioning rods 30 during the entire process of stacking the various components of the stack 200 and during the downward pressure of the press. Furthermore, after the positioning rods 30 are removed, the sides of the stack 200 are still restrained by the insulating support members 11, thereby eliminating the risk of lateral slippage and deformation of the stack 200 during the removal of the positioning rods 20 as in the prior art.

[0171] S8. Install the high-voltage assembly 300 and the low-voltage assembly of the fuel cell module 1000, encapsulate the housing 100, and complete the assembly of the fuel cell module 1000, as shown in FIG36 .

[0172] After the positioning rods 30 are removed, the blind-end side plate 120 is installed on the frame 110 to cover the blind-end port, as shown in FIG36 . In some embodiments, the fuel cell module 1000 further includes a plurality of spaced-apart shock-absorbing columns 123. Before installing the blind-end side plate 120, the shock-absorbing columns 123 are first assembled to the blind-end side plate 120 using screws, and then the blind-end side plate 120 is installed on the frame 110. The initial height of the shock-absorbing columns 123 is greater than the distance between the blind-end side plate 120 and the disc spring support plate 272 after installation. Therefore, after the blind-end side plate 120 is fastened to the frame 110, the shock-absorbing columns 123 are squeezed by the disc spring support plate 272 and the blind-end side plate 120, thereby providing a reverse force to supplement the press-fitting force transferred by the crossbeam 20.

[0173] Since the stacking process is performed along the stacking direction, the frame 110 is placed vertically, with the stacking direction parallel to the vertical direction. Since the copper busbars also extend along the stacking direction, placing the frame 110 vertically would be detrimental to the assembly of the high-voltage assembly 300. Therefore, before assembling the high-voltage assembly 300, the assembled battery stack 200 and housing 100 must be laid flat, with the stacking direction parallel to the horizontal direction.

[0174] Please refer to Figure 35. When installing the high-voltage assembly 300, first install the through terminal 320 in the high-voltage mounting hole 105 of the frame 110; then place the copper busbar assembly into the outer protrusion 111 through the operating port 104, and connect the copper busbar assembly to the pole ear of the collecting plate and the lower part of the through terminal 320 through the high-voltage bolt 340; finally, connect the high-voltage operating cover 150 to the frame 110 to cover the operating port 104, as shown in Figure 36.

[0175] When installing the low-voltage component, the wiring between the low-voltage component and the fuel cell stack 200 and / or the wiring inside the low-voltage component is mainly carried out. After the wiring is completed, the cover 180 is installed. As shown in Figure 36, the cover 180 covers the low-voltage component inside.

[0176] After the high-pressure operating cover plate 150 and the cover body 180 are installed, the housing 100 is encapsulated into a complete box structure, completing the assembly of the entire fuel cell module 1000 .

[0177] The fifth embodiment of the present application provides a vehicle, comprising at least one fuel cell module 1000 as described in any embodiment of the second aspect. Specifically, the vehicle includes a fuel cell power system, which includes a fuel cell system, a DC / DC converter, a drive motor and its motor controller, and an on-board energy storage device. The fuel cell system includes the fuel cell module 1000 and a fuel cell auxiliary system. The fuel cell system can operate normally when connected to an external fuel supply source.

[0178] The vehicle can be a hydrogen-powered vehicle or a hydrogen-powered + rechargeable hybrid electric vehicle, and can be a family car, bus, truck, etc. Since the specific structure of the vehicle is not improved in this embodiment, the structure of the vehicle that has not been modified in this embodiment can refer to the prior art, and the specific content is not described in detail here. As a result, the vehicle has all the features and advantages described above for the fuel cell power system, fuel cell system, fuel cell module 1000, and fuel cell stack 200, and will not be repeated here.

[0179] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0180] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0181] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0182] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0183] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A packaging assembly for a fuel cell, comprising a shell and a plurality of insulating support members arranged in the shell, wherein the plurality of insulating support members are distributed at intervals and arranged between the shell and the fuel cell module stack, and the plurality of insulating support members are distributed at least on each side of the stack and are in contact with each component of the stack; the insulating support members located on two adjacent sides of the stack are provided with through grooves that pass through the stack in the stacking direction, and the notches of the through grooves face the stack.

2. The package assembly according to claim 1, wherein: The housing comprises: a frame having an air intake port and a blind port; An air intake side plate connected to the frame and covering the air intake port; The blind end side plate is connected to the frame and covers the blind end port.

3. The package assembly according to claim 2, wherein: At least one side surface of the frame is provided with an opening, and the shell further comprises at least one side plate, which is connected to the frame and covers the opening.

4. The package assembly according to claim 3, wherein: The packaging assembly also includes two or more cross beams, which are spaced apart and located between the blind end plate assembly and the blind end side plate of the battery stack, and opposite to one of the opening positions; the shell applies a fastening force along the stacking direction to the battery stack through the cross beams.

5. The packaging assembly according to any one of claims 1 to 4, wherein: The plurality of insulating support members are distributed on each side and each corner of the battery stack.

6. The packaging assembly according to any one of claims 1 to 4, wherein: The inner surface of the shell is provided with one or more local convex surfaces for contacting the insulating support member and / or the positioning rod.

7. A fuel cell module, comprising a fuel cell stack, a high-voltage component, a low-voltage component and a packaging component according to any one of claims 1 to 6, wherein the high-voltage component and the low-voltage component are both installed in the shell; the fuel cell stack is encapsulated in the inner cavity of the shell of the packaging component, and the shell applies a fastening force along the stacking direction to the fuel cell stack; or, the air intake end plate of the fuel cell stack is connected to one side of the shell to form one of the end plates of the shell, and the air intake end plate and the shell jointly apply a fastening force along the stacking direction to the fuel cell stack.

8. An assembly structure, applied to a fuel cell, comprising a packaging assembly according to any one of claims 1 to 6 and four or more positioning rods, at least two of the positioning rods extending into the through grooves of the insulating support member; along the stacking direction of the fuel cell stack, the length of each of the positioning rods is not less than the sum of the length of the shell and the height difference Δh of the fuel cell stack before and after pressing.

9. The assembly structure according to claim 8, wherein: The thickness H1 of the positioning rod located in the through slot is not greater than the depth H2 of the through slot; and the width L1 is smaller than the width L2 of the through slot.

10. The assembly structure according to claim 9, wherein: The thickness H1 of the positioning rod located in the through slot is smaller than the depth H2 of the through slot; The assembly structure further includes a positioning rod fixing bracket, wherein the positioning rod fixing bracket connects the housing and the positioning rod so that the end surface of the positioning rod facing the fuel cell stack protrudes outside the through slot; The assembly structure further includes a contouring tool, the outer envelope surface or the inner envelope surface of the contouring tool being the same as the outer contour of the core of the fuel cell stack.

11. The assembly structure according to claim 8, wherein: The thickness H4 of the positioning rod located outside the through slot is not greater than the thickness H3 of the insulating support member located on the same side.

12. The assembly structure according to claim 8, wherein: The inner surface of the shell is provided with a partial outer convex surface corresponding one-to-one to the positioning rod located outside the through slot; the width L4 of the positioning rod located outside the through slot is not less than the width of the corresponding partial outer convex surface.

13. A method for assembling a fuel cell module based on the assembly structure according to any one of claims 8 to 12, comprising the following steps: A plurality of insulating support members are placed in the inner cavity of the shell along two adjacent side surfaces of the shell at intervals, wherein at least two of the insulating support members are provided with the through slots, and the at least two insulating support members provided with the through slots are distributed on different side surfaces of the shell; placing a portion of the components of the battery stack into the inner cavity; The four or more positioning rods are placed in the inner cavity at intervals along each side of the shell, and at least two of the positioning rods are The positioning rod extends into the corresponding through slot; stacking other components of the battery stack in sequence in the area of ​​the inner cavity surrounded by the four or more positioning rods; Compressing the blind end plate assembly of the stack by a press to press the stack to a set height; placing the remaining insulating support members in the inner cavity of the shell at intervals along the other two adjacent side surfaces of the shell; Remove all the positioning rods; The high-pressure component and the low-pressure component of the fuel cell module are installed, and the shell is packaged to complete the assembly of the fuel cell module.

14. The assembly method according to claim 13, wherein: After the fuel cell stack is pressed to a set height, the fuel cell assembly method further comprises: Two or more crossbeams are placed on the blind-end end plate assembly of the stack, with ends of the crossbeams extending between the blind-end end plate assembly and the shell; and the press is evacuated.

15. The assembly method according to claim 13, wherein: After the four or more positioning rods are placed in the inner cavity at intervals along the sides of the housing, and at least two of the positioning rods extend into the corresponding through grooves, the fuel cell assembly method further includes: The positions of the positioning rods are adjusted so that the end surfaces of the positioning rods in the through slots facing the fuel cell stack protrude outside the through slots, and the areas enclosed by the positioning rods completely match the outer contour of the fuel cell stack core.

Images