Fuel cell module, high-voltage assembly method and vehicle

Abstract

A fuel cell module, a high-voltage assembly method and a vehicle. The fuel cell module comprises a case, a fuel cell stack, a high-voltage assembly and a low-voltage assembly. One side of the case is provided with an outer protruding portion; the high-voltage assembly comprises a copper bar assembly and a through terminal electrically connected to each other, the copper bar assembly is electrically connected to a current collector plate of the fuel cell stack and located in the outer protruding portion, and the through terminal is mounted on the outer protruding portion; and the low-voltage assembly is electrically connected to a stack core of the fuel cell stack, and the low-voltage assembly is located outside an inner cavity of the case and arranged side by side with the outer protruding portion. The outer protruding portion is provided to mount the high-voltage assembly, so that the high-voltage assembly can be mounted without using tooling; the space beside the outer protruding portion is used to mount the low-voltage assembly, so that the size of the fuel cell module is reduced, and the volume power density is increased; additionally, the outer protruding portion made of a metal material can effectively realize high-voltage and low-voltage electromagnetic shielding.

Description

Fuel cell module, high-voltage assembly method, and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410333368.3 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 fuel cell module, a high-voltage assembly method, and a vehicle. Background Art

[0004] The fuel cell stack is composed of multiple single cells connected in series, and the power output route of the stack is usually the current collector-high-voltage copper bus-high-voltage through terminal-direct current conversion device (DCDC).

[0005] Fuel cells have high output voltages and strict electrical safety requirements. To ensure electromagnetic compatibility, high-voltage and low-voltage components are typically placed opposite each other, as far apart as possible. While this arrangement can mitigate electromagnetic interference, it also negatively impacts the stack's size.

[0006] Summary of the Invention

[0007] In order to solve the technical problem that current fuel cells cannot take into account both electromagnetic interference and volume power density, the present application provides a fuel cell module and a vehicle.

[0008] In a first aspect of the present application, a fuel cell module is provided, comprising:

[0009] a housing, one side of which is provided with an outer protrusion;

[0010] A battery stack, disposed in the inner cavity of the shell;

[0011] a high-voltage assembly, comprising an electrically connected copper busbar assembly and a through-terminal; the copper busbar assembly is electrically connected to the current collecting plate of the stack and is located in the outer protrusion, and the through-terminal is mounted on the outer protrusion;

[0012] A low-voltage component is electrically connected to the core of the fuel cell stack. The low-voltage component is located outside the inner cavity of the shell and is arranged side by side with the outer protrusion.

[0013] In some optimized technical solutions, the housing includes:

[0014] a frame having an air inlet port, a blind port and a low-pressure mounting hole for mounting the low-pressure component, the outer protrusion being located on the frame;

[0015] An air intake side plate connected to the frame and covering the air intake port;

[0016] The blind end side plate is connected to the frame and covers the blind end port.

[0017] In some optimized technical solutions, an operating port is provided on the outer protrusion, and the connection between the copper busbar assembly and the collecting plate and / or the through terminal is exposed to the outside through the operating port; the shell also includes a high-voltage operating cover, which is connected to the outer protrusion and covers the operating port.

[0018] In some optimized technical solutions, the low-voltage component and the high-voltage component are both located on the short side of the shell.

[0019] In some optimized technical solutions, the fuel cell module further includes a plurality of insulating support members, and the plurality of insulating support members are all located in the inner cavity of the shell and distributed on various sides and / or corners of the fuel cell stack.

[0020] In some optimized technical solutions, the top surface of the protrusion is lower than the top surface of the main body of the shell, so that two bending structures are formed at the connection between the protrusion and the main body of the shell; one of the insulating support members located on the side of the battery stack and one of the insulating support members located at the corner of the battery stack are in contact with the two bending structures respectively.

[0021] In a second aspect of the present application, a high-voltage assembly method for a fuel cell module according to the first aspect is provided, comprising the following steps: installing the through terminal on the protrusion; electrically connecting the copper busbar assembly to the through terminal and the current collecting plate of the stack after assembly, thereby completing the assembly of the high-voltage assembly.

[0022] In a third aspect of the present application, a vehicle is provided, comprising the fuel cell module according to the first aspect.

[0023] From the above, it can be seen that the fuel cell module provided by this application has at least the following beneficial effects:

[0024] 1) The fuel cell module provided in the present application realizes the assembly of the high-voltage component by providing an external protrusion on one side of the shell. Since the through terminals of the fuel cell stack and the high-voltage component are directly connected to the shell, the through terminals and the collecting plates connected to the copper busbar assembly are installed with the shell as the installation reference. Therefore, the high-voltage component does not need to be installed with the help of other tooling structures, and the assembly operation is simple.

[0025] 2) In the fuel cell module provided in the present application, the copper busbar assembly of the high-voltage assembly is located in the outer protrusion, and the bottom plate of the outer protrusion can also prevent the high-voltage connector from falling into the inner cavity of the shell.

[0026] 3) In the fuel cell module provided in the present application, the low-pressure assembly is arranged side by side with the convex portion, and the space beside the convex portion is rationally utilized to reduce the volume of the fuel cell module and improve the volume power density.

[0027] 4) In the fuel cell module provided in the present application, the copper busbar assembly is located inside the outer convex portion, the low-pressure assembly is located outside the outer convex portion, and the high-pressure assembly and the low-pressure assembly are separated by the outer convex portion. Since the shell is usually made of metal material, the outer convex portion of the metal material can effectively achieve high-pressure and low-pressure electromagnetic shielding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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.

[0029] FIG1 shows a schematic structural diagram of a fuel cell module in one or more embodiments of the present application.

[0030] FIG. 2 shows an exploded view of the fuel cell module of FIG. 1 .

[0031] FIG. 3 shows a front view of the fuel cell module of FIG. 1 .

[0032] FIG. 4 shows a top view of the fuel cell module of FIG. 1 .

[0033] FIG. 5 shows a cross-sectional view taken along the line AA in FIG. 3 .

[0034] FIG. 6 shows a cross-sectional view taken along line BB in FIG. 4 .

[0035] FIG. 7 shows a partial enlarged view of point C in FIG. 5 .

[0036] FIG. 8 shows a cross-sectional view taken along the line DD in FIG. 3 .

[0037] FIG9 shows a schematic structural diagram of a fuel cell module in some other embodiments of the present application.

[0038] FIG. 10 shows an exploded view of the fuel cell module of FIG. 9 .

[0039] FIG. 11 shows a left side view of the fuel cell module of FIG. 9 .

[0040] FIG12 shows a schematic structural diagram of a corner support member in the fuel cell module of FIG9 .

[0041] FIG. 13 shows a left side view of a corner support member in the fuel cell module of FIG. 9 .

[0042] FIG14 shows a schematic structural diagram of a side support member in the fuel cell module of FIG9 .

[0043] FIG. 15 shows a left side view of the side support member in the fuel cell module of FIG. 9 .

[0044] FIG16 shows an assembly structure diagram of a crossbeam and a disc spring support plate in a fuel cell module according to certain embodiments.

[0045] FIG17 shows a structural block diagram of a vehicle in one or more embodiments of the present application.

[0046] Description of reference numerals:

[0047] 1000 - Fuel cell module. 10 - Insulation support assembly; 11 - Insulation support member, 11a - Side support member, 11b - Corner support member; 12 - Groove; 13 - Ridge; 14 - Purge channel; 16 - Notch; 17 - Concave-convex structure. 20 - Crossbeam. 40 - Shock absorber column.

[0048] 100-shell, 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; 110-frame, 111-external protrusion, 112-longitudinal beam, 113-boss, 114-purge inlet, 115-purge outlet, 116-drain outlet, 117-bending structure; 120-blind end side panel, 121-limiting column, 122-mounting platform; 130-upper cover; 140-side cover; 150-high-pressure operation cover; 160-mounting support; 170-air inlet side panel; 180-cover.

[0049] 200-fuel cell stack; 210-air inlet end plate; 230-air inlet current collecting plate, 231-first pole lug; 240-core; 250-blind end current collecting plate, 251-second pole lug; 260-blind end insulating plate; 270-blind end plate assembly, 271-blind end plate, 272-disc spring support plate, 273-disc spring, 274-limiting groove, 275-limiting protrusion.

[0050] 300 - High-voltage components; 311 - First copper busbar, 312 - Second copper busbar; 320 - Through terminal; 330 - Nut; 340 - High-voltage bolt. 400 - Low-voltage components. DETAILED DESCRIPTION

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Please refer to Figures 1, 2, 9 and 10. The first embodiment of the present application provides a fuel cell module 1000, which includes a fuel cell stack 200, a high-voltage assembly 300, a low-voltage assembly 400 and an externally encapsulated shell 100. The high-voltage assembly 300 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 400 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 400 are all mounted and fixed by the shell 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.

[0056] Please refer to Figures 1 and 9. One side of the shell 100 is provided with an outer protrusion 111, and the outer protrusion 111 is located on one of the four side surfaces of the shell 100 excluding the two end surfaces of the blind end and the air inlet end. The outer protrusion 111 is a part of the shell 100 that protrudes outward, and the interior of the outer protrusion 111 is connected to the inner cavity of the shell 100. The high-voltage assembly 300 of the fuel cell module 1000 is installed on the outer protrusion 111, specifically the copper busbar assembly is located in the inner cavity of the outer protrusion 111, and the through terminal 320 is installed on the outer protrusion 111. A high-voltage mounting hole 105 is provided on the top surface of the outer protrusion 111. As shown in Figure 2, the through terminal 320 is installed in the high-voltage mounting hole 105. The upper part of the through terminal 320 extends out of the outer protrusion 111 and is used to connect the high-voltage wiring harness, and then electrically connect to the DCDC. The lower portion of the through terminal 320 extends into the outer protrusion 111 and is used to be electrically connected to the copper busbar of the copper busbar assembly through the high-voltage bolt 340, as shown in FIG7 .

[0057] Referring to Figures 1, 3, and 5, the low-pressure assembly 400 is located outside the inner cavity of the housing 100 and is arranged side by side with the outer protrusion 111, making rational use of the space beside the outer protrusion 111 to reduce the volume of the fuel cell module 1000. In certain embodiments, the outer protrusion 111 is disposed on one of the vertical side surfaces of the housing 100, and the low-pressure assembly 400 is then installed below the outer protrusion 111, making rational use of the space below the outer protrusion 111. The low-pressure assembly 400 can be located entirely outside the housing 100, or partially outside the housing 100 with the remainder located within the inner cavity of the housing 100. Since the high-pressure assembly 300 and the low-pressure assembly 400 are separated by the outer protrusion 111, and since the housing 100 is typically made of metal, the metal outer protrusion 111 can effectively achieve high-voltage and low-voltage electromagnetic shielding.

[0058] A low-voltage mounting hole 108 is provided in the area on the housing 100 next to the outer protrusion 111. The low-voltage mounting hole 108 and the outer protrusion 111 are located on the same side of the housing 100. The low-voltage component 400 or the low-voltage wiring harness passes through the low-voltage mounting hole 108. Please refer to Figures 9 and 10. In some embodiments, the outer cover of the low-voltage component 400 is buckled with a cover body 180, and the cover body 180 is connected to the housing 100, and the low-voltage component 400 is encapsulated in the cover body 180. When installing the low-voltage component 400, the wiring between the low-voltage component 400 and the battery stack 200 and / or the wiring inside the low-voltage component 400 is mainly carried out. After the wiring is completed, the cover body 180 is installed, and the cover body 180 covers the low-voltage component 400 inside.

[0059] Since the low-pressure assembly 400 and the high-pressure assembly 300 are located on the same side of the housing 100, they can be arranged on either the long side or the short side of the housing 100. Referring to Figures 1, 5, 9, and 11, in some embodiments, the low-pressure assembly 400 and the high-pressure assembly 300 are both arranged on the short side of the housing 100. Compared to arrangements on the long side, arrangements on the short side result in a higher degree of integration of the entire module, which can reduce the volume of the fuel cell module 1000 and increase the volumetric power density.

[0060] In some embodiments, the tabs of the current collecting plate are bent, and the copper bars of the copper bar assembly are straight; and the connections between the copper bar assembly, the current collecting plate, and the through terminals are exposed to the outside through the operation port.

[0061] In some embodiments, nuts are provided on the copper busbars of the copper busbar assembly and / or on the current collecting plate; the nuts are punch rivet nuts or pressure rivet nuts.

[0062] Referring to Figures 2, 9, and 10, 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 collector 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 installation of the high-voltage bolt 340.

[0063] Referring to Figures 2, 9, and 10, 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 through the access port 104. One end of the copper busbar mates with the tab of the current collector plate, and the other end mates with the butt joint of the through-terminal 320. Both ends are locked with the high-pressure bolts 340.

[0064] At the two connecting ends of the copper busbar, at least one of the copper busbar and the docking part is provided with a threaded hole, and the other can have a through hole or also a threaded hole. When the thickness of the copper busbar, the tab, and the docking part is relatively thin, the effective thread length is short, which may cause the bolt to slip when tightened. To this end, please refer to Figures 7 and 8. 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 can increase the effective thread length, increase the assembly torque of the high-voltage parts of the fuel cell stack, prevent the high-voltage bolt 340 from slipping when tightened, and improve the reliability of the copper busbar connection. The nut 330 can be installed and fixed by punch riveting, press riveting or welding.

[0065] In some embodiments, the tabs of the current collector are bent, and the copper busbars of the copper busbar assembly are straight, with one end of the copper busbar abutting the bent portion of the tab and the other end abutting the mating portion of the through-terminal 320, both ends being fastened by high-pressure bolts 340. By setting the tabs to be bent, the mating surfaces of the copper busbar, the tabs, and the through-terminal 320 are substantially coplanar, facilitating assembly.

[0066] The fuel cell module 1000 can adopt a single stack solution or a multi-stack integrated solution, which is not limited in this application. Please refer to Figures 2 and 10, which show exploded views of the fuel cell module 1000 in different embodiments of the present application. The fuel cell module 1000 adopts a single stack solution, that is, only one stack 200 is provided in the stack of the shell 100. Please refer to Figure 8. The stack 200 is composed of an intake end plate 210, an intake end current collecting plate 230, a core 240, a blind end current collecting plate 250, a blind end insulating plate 260 and a blind end end plate assembly 270 from the intake end to the blind end. An insulating layer is integrated on the intake end plate 210, which acts as an intake end insulating plate. In some embodiments, the blind end end plate assembly 270 of the stack 200 includes a blind end end plate 271, a disc spring 273 and a disc spring support plate 272.

[0067] The inlet-end current collector plate 230 is provided with a protruding first electrode tab 231, and the blind-end current collector plate 250 is provided with a protruding second electrode tab 251. Accordingly, the copper busbar assembly includes a first copper busbar 311 and a second copper busbar 312. The inlet end of the first copper busbar 311 is bonded to the first electrode tab 231 and connected via a high-pressure bolt 340, while the blind end is bonded to the positive electrode mating portion of the through-hole terminal 320 and connected via a high-pressure bolt 340. The inlet end of the second copper busbar 312 is bonded to the negative electrode mating portion of the through-hole terminal 320 and connected via a high-pressure bolt 340, while the blind end is bonded to the second electrode tab 251 and connected via a high-pressure bolt 340.

[0068] In some embodiments, the air intake end plate of the fuel cell stack is connected to one side of the shell to form the air intake end side plate.

[0069] Referring to Figures 2 and 10, 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, a blind end port 103, and a low-pressure mounting hole 108 for mounting the low-pressure assembly 400. 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 side surfaces of the housing 100. 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 side plate 170.

[0070] The fuel cell housing 100 is typically provided with a purge port. Refer to Figures 1, 3, 6, 9, and 11. In some embodiments, the housing 100 is provided with a purge inlet 114, a purge outlet 115, and a drain port 116. If the main body of the housing 100 is a frame 110, the purge inlet 114, purge outlet 115, and drain port 116 are all provided on the frame 110. The purge inlet 114, purge outlet 115, and drain port 116 can be formed by drilling holes in the frame 110 and then welding the joints. Alternatively, the purge inlet 114, purge outlet 115, and drain port 116 can be integrally formed with the frame 110, with the channels formed by machining. The purge inlet 114, purge outlet 115, and drain port 116 are all provided on the housing 100 and communicate with the inner cavity of the housing 100. The specific locations of the purge inlet 114, purge outlet 115, and drain port 116 are not limited in this application.

[0071] Please refer to Figures 7, 9 and 11. 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, and the purge outlet 115 is arranged above the outer protrusion 111, utilizing the space formed by the sinking of the 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 air flow flow toward the high-voltage component 300, blow away the water vapor inside the outer protrusion 111, avoid electrical conduction caused by water vapor, and improve the safety of the fuel cell module 1000.

[0072] 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. 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.

[0073] Referring to Figures 1 and 2 , in certain embodiments, housing 100 employs a split structure, including a frame 110, an air inlet side panel 170, and a blind-end side panel 120. Frame 110 is provided with an air inlet port 102 and a blind-end port 103. Both air inlet side panel 170 and blind-end side panel 120 are connected to frame 110 and cover air inlet port 102 and blind-end port 103, respectively. Air inlet side panel 170 and blind-end side panel 120 form the two end panels of housing 100, while frame 110 forms the four sides of housing 100. A purge outlet 115 and a drain outlet 116 are both provided on frame 110, while a purge inlet 114 is provided on blind-end side panel 120. Referring to Figure 11, in some embodiments, the purge inlet 114 is located at the bottom of the blind-end side plate 120, and the purge outlet 115 is located at the upper portion of one of the side surfaces of the frame 110, close to the air inlet port 102. The purge gas flow entering from the purge inlet 114 flows along the short side of the bipolar plate, the long side of the bipolar plate, and the stacking direction, and is discharged from the purge outlet 115, so that the flow path of the air flow is long. After entering from the purge inlet 114, the gas impacts the wall surface and disperses, ensuring the purge effect. The mounting legs 160 are all connected to the frame 110, and the drain outlet 116 is located on the bottom surface of the frame 110. In some embodiments, the frame 110 is provided with an air inlet port 102, a blind port 103, and a side opening 107. The air inlet end plate 210, the blind-end side plate 120, and the side cover plate 140 of the fuel cell stack 200 are all connected to the frame 110, and respectively cover the air inlet port 102, the blind port 103, and the side opening 107. The purge outlet 115 and the drain outlet 116 are both provided on the frame 110 , and the purge inlet 114 is provided on the side cover 140 .

[0074] Referring to Figures 9, 10, and 11, in certain embodiments, the purge inlet 114 is located at the bottom of the side cover 140, and the purge outlet 115 is located on another vertical side of the frame 110, with the height of the purge outlet 115 being higher than the purge inlet 114. The bottom-in, top-out purge direction, on the one hand, utilizes the fact that hydrogen is lighter and converges above the inner cavity of the shell 100, and the purge outlet 115 is arranged at the top to facilitate hydrogen discharge; on the other hand, after entering through the purge inlet 114, the gas impacts the inner wall of the frame 110 and the insulating support 11 and disperses, ensuring a good purge effect. The mounting legs 160 are all connected to the frame 110, and the drain outlet 116 is located on the bottom surface of the frame 110, close to the side where the purge outlet 115 is located, utilizing the outlet guidance function to enhance the drainage effect of the purge.

[0075] In some embodiments, the purge inlet 114 and the purge outlet 115 are both close to the air inlet port 102. Since the air inlet end plate 210 of the fuel cell stack 200 is directly used as the air inlet end side plate 170 of the shell 100, there is no gap between the air inlet end of the fuel cell stack 200 and the shell 100. There is a large gap between the blind end of the fuel cell stack 200 and the shell 100, so the purge airflow inside the shell 100 has a tendency to flow toward the blind end. By arranging the purge inlet 114 and the purge outlet 115 on the shell 100 close to the air inlet port 102, the purge airflow will inevitably flow from the air inlet end to the blind end and then from the blind end to the air inlet end when it circulates, thereby extending the purge path and improving the purge effect.

[0076] Please refer to Figures 2 and 10, which show exploded views of the fuel cell module 1000 in different embodiments of the present application. In certain embodiments, the fuel cell module 1000 further includes an insulating support assembly 10. The insulating support assembly 10 is disposed between the housing 100 and the fuel cell stack 200. The insulating support assembly 10 is in contact with all components of the fuel cell stack 200 and is capable of supporting the sides of the fuel cell stack 200 to resist inter-layer slippage of the fuel cell stack 200. The insulating support assembly 10 includes a plurality of insulating support members 11 spaced apart. The insulating support member 11 has a certain rigidity, and at least the surface of its outer surface that is in contact with the fuel cell stack 200 and the housing 100 is an 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 insulating support 11 is a component independent of the shell 100 and the battery stack 200. Compared with the anti-collapse structure of using the shell 100 to directly press against the battery stack 200, multiple independent insulating support members 11 are easier to install and the battery stack 200 is less difficult to assemble.

[0077] A plurality of insulating support members 11 are distributed at least at each corner and / or each side of the stack 200. In some embodiments, the number of insulating support members 11 is sufficient to provide one insulating support member 11 on each side of the stack 200. In some embodiments, the number of insulating support members 11 is sufficient to provide one insulating support member 11 at each corner of the stack 200, and 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. The plurality of insulating support members 11 can fully cover the stack 200 from all directions, achieving a fully covered anti-slip effect for the core 240. When external vibration or impact excitation acts on the stack 200, it can be transferred to the frame 110 through the insulating support members 11 that are fully covered on all sides.

[0078] In some embodiments, in addition to providing one insulating support member 11 at each corner of the stack 200, the insulating support members 11 may also be arranged on the sides of the stack 200, for example, at least one insulating support member 11 is arranged on each side. Taking a rectangular bipolar plate with two sides of different lengths as an example, the number of insulating support members 11 may be 4, and the four insulating support members 11 are respectively arranged at the four corners of the stack 200; the number of insulating support members 11 may be 6, of which 4 insulating support members 11 are respectively arranged at the four corners of the stack 200, and the remaining 2 insulating support members 11 can be respectively arranged on the long side or short side of the stack 200; the number of insulating support members 11 may be 8, of which 4 insulating support members 11 are respectively arranged at the four corners of the stack 200, and the remaining 4 insulating support members 11 can be respectively arranged on the long side and short side of the stack 200.

[0079] For the sake of convenience, the insulating support members 11 distributed at the corners of the fuel cell stack 200 will be referred to as corner support members 11 b , and the insulating support members 11 distributed on the sides of the fuel cell stack 200 will be referred to as side support members 11 a .

[0080] Referring to Figures 2 and 10 , in some embodiments, the bipolar plates of the stack 200 are 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 arranged at the four corners of the stack 200, four side support members 11a are distributed in pairs on each long side of the stack 200, and the remaining two side support members 11a are distributed one-to-one on each short side of the stack 200. In some embodiments, the four side support members 11a located on the two long sides of the 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 stack 200 can be positioned one-to-one or staggered along the short sides.

[0081] Referring to Figures 7, 9, and 11, 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 in contact with the two bent structures 117, respectively. 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.

[0082] The insulating support member 11 is located between the battery stack 200 and the housing 100, enabling a single part to transmit and transfer external excitations. When external vibrations and impact excitations act on the battery stack 200, they can be transferred to the housing 100 through the insulating support member 11 that is fully wrapped on all sides. Therefore, the insulating support member 11 needs to be in direct contact with both the battery stack 200 and the housing 100, and the surface quality of the contact surface should be as high as possible. Referring to Figures 12, 13, 14, and 15, in some embodiments, at least one insulating support member 11 is provided with a groove 12, which can be provided on one of the side surfaces of the insulating support member 11, or grooves 12 can be provided on both sides of the insulating support member 11. The groove wall of the groove 12 contacts the fuel cell stack 200 and / or the shell 100. By providing the groove 12, on the one hand, the contact surface area of ​​the insulating support member 11 and the fuel cell stack 200 and / or the shell 100 is reduced and does not exceed the area of ​​the end surface of the groove wall of the groove 12. The groove 12 protrudes outward, which facilitates the processing of the end surface. After the insulating support member 11 is manufactured, only the contact surface needs to be fine-machined, which facilitates the realization of high flatness in a limited area and reduces the manufacturing difficulty. On the other hand, it can reduce the weight of the insulating support member 11, thereby reducing the weight of the entire fuel cell module 1000. In some embodiments, a local convex surface can also be provided at a corresponding position on the shell 100. The local convex surface contacts the locally processed surface of the insulating support member 11, which can not only ensure the matching accuracy of the contact surface, but also reduce the processing area of ​​the inner surface of the shell 100, facilitate the realization of high flatness in a limited area and reduce the manufacturing difficulty.

[0083] In certain embodiments, referring to Figures 13, 14, and 15, 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 battery stack 200 and the housing 100 and does not contact the battery stack 200 and the housing 100. By providing the concave-convex structure 17, the creepage clearance can be increased, so that the straight-line distance between the battery stack 200 and the housing 100 can be less than the 20mm creepage clearance requirement, reducing the volume of the fuel cell module 1000 and improving the volume power density. The concave-convex structure 17 can be a raised boss 113 and / or a concave depression on the surface of the insulating support member 11. The specific structural form is not limited in this application.

[0084] The insulating support member 11 contacts all components of the battery stack 200. The insulating support member 11 can be a straight rod or a curved rod. The extension direction of the insulating support member 11 can be along the stacking direction or inclined relative to the stacking direction. Referring to Figures 2 and 10, in some embodiments, the insulating support member 11 extends along the stacking direction. The surface of the insulating support member 11 is provided with a plurality of ridges 13 extending along the stacking direction. The ridges 13 serve as the groove walls of the groove 12. The groove 12 of the insulating support member 11 facing the battery stack 200 is a through groove that runs through the stacking direction, that is, two ridges 13 are arranged in parallel. The two ridges 13, the main body of the insulating support member 11, and the outer surface of the battery stack 200 together form a through groove. This through groove is conductive along the stacking direction and can not only serve as an airflow channel, but also be used to install the positioning rod used when the battery stack 200 is stacked. The positioning rod used when the battery stack 200 is stacked can be installed using the through groove of the side support member 11a, eliminating the need for additional positioning rod fixing tooling, reducing the number of tooling parts, and facilitating operation. In some embodiments, chamfers are arranged at both ends of the insulating support 11, and rounded corners are arranged at the sharp edges of the chamfers, and rounded corners are also set on the edges of the ridge 13 facing the fuel cell stack 200, so as to facilitate the movement of the single cells of the core 240 during the pressing and disassembly processes, while preventing scratches on the surface of the single cells.

[0085] In some embodiments, the insulating support 11 is in full contact with the battery stack 200 and the shell 100, which facilitates the transmission and transfer of external excitation, thereby allowing two adjacent insulating support members 11, the shell 100 and the battery stack 200 to enclose a cavity, and multiple insulating support members 11 divide the annular space between the battery stack 200 and the shell 100 into multiple cavities, and the corresponding purge inlet 114, purge outlet 115 and drain port 116 are all connected to at least one cavity. In some embodiments, please refer to Figure 12, a purge channel 14 for connecting two adjacent cavities is provided on the insulating support 11. By providing the purge channel 14, multiple cavities are connected in sequence, which facilitates the flow of purge air to various areas of the annular space between the battery stack 200 and the shell 100. The purge channel 14 can be a hole, a groove or a notch, and the specific structural form is not limited in this application.

[0086] In some embodiments, the purge channel 14 is an avoidance area provided at at least one end of the insulating support 11. The avoidance area is used to avoid the structure on the shell 100. The size of the avoidance area is larger than the structure to be avoided. The avoidance space not occupied by the structure forms a purge channel 14 connecting the two adjacent cavities. Referring to Figures 12, 13, 14 and 15, in some embodiments, the purge channel 14 is a plurality of recesses 16 provided on the insulating support 11. Both sides of the body of the insulating support 11 are provided with ridges 13 extending along the stacking direction, and the ridges 13 are in contact with the shell 100 and the battery stack 200. There are more than one recesses 16 distributed at intervals on the ridge 13, and the recesses 16 form a purge channel 14 connecting the two cavities. The recess 16 can be a notch obtained by removing part of the material of the ridge 13; or it can be an area between two adjacent ridges 13 when the ridge 13 is set as a multi-segment structure. In some embodiments, an avoidance area and a recess 16 may be provided on the insulating support 11 as the purge channel 14 . The purge channel 14 has a larger area, which reduces the flow resistance of the purge airflow when passing through the purge channel 14 .

[0087] In some embodiments, 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 collide with the insulating support member 11 when passing through and be dispersed, thereby increasing the purge area and improving the purge effect.

[0088] In some embodiments, through grooves may be provided on both sides of each insulating support member 11, so that airflow channels are formed between the insulating support member 11 and the housing 100, and between the insulating support member 11 and the battery stack 200, and the airflow channels are connected to the inner cavity of the housing 100 through the purge channel 14. In some embodiments, through grooves may be provided only on the side support member 11a, or only on the side of the side support member 11a facing the battery stack 200. This ensures that the positioning rods used when assembling the battery stack 200 can be installed using the through grooves of the side support member 11a, without the need for additional positioning rod fixing tooling, reducing the number of tooling parts, and facilitating operation.

[0089] Along a direction perpendicular to the stacking direction (the long side direction or the 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 Figure 2. In some embodiments, the air intake end plate 210 is provided with a plurality of mounting grooves (not shown in the figure), 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, and the other end corresponds to the plurality of limiting posts 121. One end of the insulating support member 11 extends into the mounting slot, which limits the insulating support member 11 along the long and short sides of the bipolar plates. 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.

[0090] Please refer to Figures 12 and 13. For the corner support member 11b, its cross-section is roughly L-shaped. The corner support member 11b contacts both sides of the corner of the battery stack 200 and automatically limits the position in the long side / short side direction of the bipolar plate. Please refer to Figure 16. In some embodiments, a plurality of limiting protrusions 275 are provided on the peripheral side of the blind end plate assembly 270 of the battery stack 200, and at least one insulating support member 11 is clamped between two adjacent limiting protrusions 275. The limiting protrusions 275 are arranged in pairs, and their number is the same as the number of the side support members 11a. The mounting groove limits the end of the side support member 11a, and the limiting protrusion 275 limits the middle part of the side support member 11a, further improving the limiting effect of the side support member 11a.

[0091] Please refer to Figures 2 and 10. In some embodiments, the fuel cell module 1000 further includes two or more crossbeams 20, which are spaced apart and located between the blind-end end plate assembly 270 and the blind-end side plate 120 of the stack 200. The housing 100 applies a fastening force along the stacking direction to the stack 200 through the crossbeams 20. The crossbeams 20 are parallel to the long side or short side of the bipolar plate. Both ends of the crossbeams 20 extend into the housing 100 and are restricted by the housing 100 so as not to be displaced, thereby applying a fastening force along the stacking direction to the 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 end plate assembly 270, achieving a uniform distribution of the press-fitting force, which can effectively reduce the problem of plate deformation caused by the large press-fitting force of the high-power stack 200.

[0092] Please refer to Figure 9. 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 battery stack 200. 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 battery stack 200. In conjunction with the shell 100 located at the edge of the battery stack 200, the pressing force can be evenly distributed on the entire end face.

[0093] In some embodiments, an opening is provided on one of the side surfaces of the shell 100. The opening can be provided on the other four side surfaces of the shell 100 except the air inlet end surface and the blind end surface. Each cross beam 20 is opposite to the opening so that each cross beam 20 can be inserted into the shell 100 through the opening. The provision of the opening facilitates the insertion of the cross beam 20 during the assembly process.

[0094] Referring to Figures 2 and 10 , in some embodiments, the upper surface of the housing 100 is provided with an upper opening 106, and an outer protrusion 111 is provided on one of the vertical side surfaces of the housing 100, which is perpendicular to the plane in which the upper opening 106 is located. The housing 100 also includes an upper cover plate 130, which covers the upper opening 106. The upper surface of the housing 100 faces the large surface of the stack 200 (the side edges are respectively along the long side direction of the bipolar plates and the stacking direction). The provision of the upper opening 106 reduces the structural strength of the upper surface of the housing 100. To improve the strength of the housing 100, in some embodiments, the upper surface of the housing 100 is provided with one or more longitudinal beams 112, each of which is 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 housing 100 from the space in the upper opening 106 not occupied by the longitudinal beams 112.

[0095] Referring to Figure 8 , 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.

[0096] Please refer to Figure 16. 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 the same as the position and number of the beam 20. The beams 20 are arranged in the corresponding limiting grooves 274 one by one. The limiting grooves 274 further limit the movement of the beams 20 during vibration and impact. The groove depth of the limiting groove 274 is no greater than the thickness of the beam 20, ensuring that the beam 20 can be tightly pressed against the shell 100. In some embodiments, the outer surface of the disc spring support plate 272 of the battery stack 200 is provided with a limiting groove 274. By providing the limiting groove 274, the thickness of the disc spring support plate 272 is increased, and the bending deformation is smaller.

[0097] 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.

[0098] A second embodiment of the present application provides a high-voltage assembly method for a fuel cell module, for assembling the high-voltage components of the fuel cell module 1000 described in any of the embodiments of the first aspect. The high-voltage assembly method comprises the following steps: first, installing the through-terminal 320 in the high-voltage mounting hole 105 of the frame 110; then, inserting the copper busbar assembly into the outer protrusion 111 through the operating port 104; and connecting the copper busbar assembly to the tabs of the current collector and the lower portion of the through-terminal 320 using high-voltage bolts 340; finally, connecting the high-voltage operating cover 150 to the frame 110, covering the operating port 104, thereby completing the assembly of the high-voltage components.

[0099] Taking the fuel cell module of a single stack solution as an example, the high-voltage assembly method specifically includes the following steps: first, install the through terminal 320 in the high-voltage mounting hole 105 of the frame 110; then place the first copper bar 311 and the second copper bar 312 into the outer protrusion 111 through the operating port 104, fit the air inlet end of the first copper bar 311 with the first pole ear 231 and connect them through the high-pressure bolt 340, fit the blind end with the positive electrode docking part of the through terminal 320 and connect them through the high-pressure bolt 340, fit the air inlet end of the second copper bar 312 with the negative electrode docking part of the through terminal 320 and connect them through the high-pressure bolt 340, fit the blind end with the second pole ear 251 and connect them through the high-pressure bolt 340; finally, connect the high-voltage operation cover 150 to the frame 110, cover the operation port 104, and complete the assembly of the high-voltage component.

[0100] In related designs, the installation order of the fuel cell stack is usually as follows: first, assemble the membrane electrode, bipolar plate, end plate, current collecting plate, etc. into a core; secondly, fix the copper busbar assembly on the current collecting plate, and then fix the core to the shell; finally, fix the through terminal to the shell. Since the through terminal is installed after the copper busbar assembly, it is usually necessary to use auxiliary assembly tooling to determine the position when assembling the copper busbar assembly. For example, the invention application with publication number CN117199469A discloses an assembly tool and a method for assembling high-voltage components for fuel cells. At the same time, in order to prevent the high-voltage bolts from falling off during the assembly of the through terminal in related designs, it is usually necessary to design additional anti-falling parts, such as setting a baffle in the inner cavity of the shell to block the bottom of the high-voltage bolt, or setting a sheath and installing the high-voltage bolt in the sheath.

[0101] The fuel cell module 1000 provided in the present application is directly mounted on the outer protrusion 111 of the housing 100 at the through terminal 320, and the stack 200 is also connected to the housing 100 (for example, the intake end plate 210 of the stack is connected to the housing 100, or the blind end plate assembly 270 of the stack is connected to the housing 100). The through terminal 320 and the current collecting plate connected to the copper busbar assembly are both installed with the housing 100 as the installation reference. Therefore, the high-voltage assembly 300 does not need to be installed with the help of other tooling structures, 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 bolts 340 from falling into the inner cavity of the housing 100.

[0102] Referring to FIG. 17 , an embodiment of the third aspect of the present application provides a vehicle comprising at least one fuel cell module 1000 as described in any embodiment of the first aspect. Specifically, the vehicle comprises a fuel cell power system comprising 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 comprises 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.

[0103] The fuel cell auxiliary system of the fuel cell system includes an air supply subsystem, a fuel supply subsystem, a thermal management subsystem and an automatic control system, wherein the air supply subsystem is used to provide air to each stack 200 of the fuel cell module 1000, and can optionally filter, humidify, pressure regulate and other aspects of the air. The air supply subsystem is connected to the air inlet and air outlet of each stack 200 of the fuel cell module 1000; the fuel supply subsystem is used to provide fuel to each stack 200 of the fuel cell module 1000, and can optionally humidify, pressure regulate and other aspects of the fuel to convert it into fuel gas suitable for operation in the fuel cell stack. Taking hydrogen as fuel as an example, the fuel supply subsystem is connected to the hydrogen inlet and hydrogen outlet of each stack 200 of the fuel cell module 1000; the thermal management subsystem is connected to each stack 200 of the fuel cell module 1000 to provide coolant to cool and / or heat the stack 200, and to recycle the water generated by the stack 200.

[0104] The automatic control system is electrically connected to the fuel cell module 1000, the air supply subsystem, the fuel supply subsystem, and the thermal management subsystem. The automatic control system comprises an assembly of sensors, actuators, valves, switches, and control logic components, ensuring the proper operation of the fuel cell system without human intervention. In other embodiments, the fuel cell auxiliary system may also include a ventilation system for mechanically discharging gases from the fuel cell system housing to the exterior. The fuel cell auxiliary system in this embodiment has not been modified; therefore, further details are provided in the relevant prior art disclosures and are not detailed here.

[0105] In a fuel cell power system, a DC / DC converter is electrically connected to each fuel cell stack 200 of the fuel cell system to achieve voltage conversion. The voltage generated by each fuel cell stack 200 is regulated and output to high-voltage devices such as the drive motor and the automotive air conditioning compressor, as well as energy storage devices such as batteries. The drive motor is electrically connected to the DC / DC converter to provide the torque required for vehicle travel. The motor controller is electrically connected to the drive motor to control the start, stop, and torque output of the drive motor. The motor controller is connected to the vehicle control to receive driving signals from the vehicle controller and can also be electrically connected to the fuel cell system's automatic control system. The on-board energy storage device is used to store electrical energy to power other electronic devices in the vehicle. The on-board energy storage device is electrically connected to the DC / DC converter and can be, for example, a battery.

[0106] In this embodiment, the DC / DC converter, the drive motor and its motor controller, and the on-board energy storage device in the fuel cell power system have not been improved. Therefore, for more detailed information, please refer to the relevant disclosures of the prior art and will not be described in detail here.

[0107] In addition, the vehicle also needs to include a transmission system and a fuel storage device for storing fuel. The transmission system transmits the torque of the drive motor to drive the wheels to rotate. The fuel storage device acts like a fuel tank in a fuel vehicle. The fuel storage device is connected to the fuel supply subsystem of the fuel cell system through a pipeline.

[0108] Thus, 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 in this embodiment that has not been changed can refer to the prior art, and the specific content is not described in detail here. Thus, 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.

[0109] 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.

[0110] 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.

[0111] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0112] 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.

[0113] 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 fuel cell module, comprising: a housing, one side of which is provided with an outer protrusion; A battery stack, disposed in the inner cavity of the shell; a high-voltage assembly, comprising an electrically connected copper busbar assembly and a through-terminal; the copper busbar assembly is electrically connected to the current collecting plate of the stack and is located in the outer protrusion, and the through-terminal is mounted on the outer protrusion; A low-voltage component is electrically connected to the core of the fuel cell stack. The low-voltage component is located outside the inner cavity of the shell and is arranged side by side with the outer protrusion.

2. The fuel cell module according to claim 1, wherein: The housing comprises: a frame having an air inlet port, a blind port and a low-pressure mounting hole for mounting the low-pressure component, the outer protrusion being located on the frame; 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 fuel cell module according to claim 2, wherein: The air intake end plate of the fuel cell stack is connected to one side of the shell to form the air intake end side plate.

4. The fuel cell module according to any one of claims 1 to 3, wherein: An operation port is provided on the outer protrusion, and the connection between the copper busbar assembly and the current collecting plate and / or the through terminal is exposed to the outside through the operation port; the shell also includes a high-voltage operation cover plate, which is connected to the outer protrusion and covers the operation port.

5. The fuel cell module according to claim 4, wherein: The tabs of the current collecting plate are bent, and the copper bars of the copper bar assembly are straight; the connections between the copper bar assembly, the current collecting plate, and the through terminals are all exposed to the outside through the operating port; Nuts are provided on the copper bar of the copper bar assembly and / or on the current collecting plate; the nuts are punch rivet nuts or pressure rivet nuts.

6. The fuel cell module according to any one of claims 1 to 3 and 5, wherein: The low-voltage component and the high-voltage component are both located on the short side of the shell.

7. The fuel cell module according to claim 4, wherein: The low-voltage component and the high-voltage component are both located on the short side of the shell.

8. The fuel cell module according to any one of claims 1 to 3 and 5, wherein: The fuel cell module further includes a plurality of insulating support members, which are all located in the inner cavity of the shell and distributed on each side and / or each corner of the fuel cell stack.

9. The fuel cell module according to claim 4, wherein: The fuel cell module further includes a plurality of insulating support members, which are all located in the inner cavity of the shell and distributed on each side and / or each corner of the fuel cell stack.

10. The fuel cell module according to claim 8, wherein: The top surface of the protruding portion is lower than the top surface of the main body of the shell, so that two bending structures are formed at the connection between the protruding portion and the main body of the shell; one of the insulating support members located on the side of the battery stack and one of the insulating support members located at the corner of the battery stack are respectively in contact with the two bending structures.

11. The fuel cell module according to claim 9, wherein: The top surface of the protruding portion is lower than the top surface of the main body of the shell, so that two bending structures are formed at the connection between the protruding portion and the main body of the shell; one of the insulating support members located on the side of the battery stack and one of the insulating support members located at the corner of the battery stack are respectively in contact with the two bending structures.

12. A high-voltage assembly method for a fuel cell module according to any one of claims 1 to 11, comprising the following steps: installing the through terminal on the protrusion; electrically connecting the copper busbar assembly to the through terminal and the current collecting plate of the fuel cell stack after assembly, thereby completing the assembly of the high-voltage assembly.

13. A vehicle comprising the fuel cell module according to any one of claims 1 to 11.

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