Seal assembly, fuel cell system, and vehicle

Abstract

The application discloses a sealing assembly, a fuel cell system and a vehicle, and relates to the technical field of fuel cell systems. The sealing assembly comprises a first shell, a plug-in connector and a sealing element. The first shell defines an electric pile space in the first shell, and the electric pile space is used for mounting a battery pile of the fuel cell system. The first shell is formed with a through hole which is in communication with the electric pile space. The plug-in connector is plugged into the through hole and comprises a second shell and a plug-in bus bar. The plug-in bus bar has a first connecting end and a second connecting end. The first connecting end is electrically connected with the battery pile. The second connecting end is adapted to be electrically connected with a power distribution unit of the fuel cell system. The sealing element is arranged between the first shell and the second shell. At least one of the first shell and the second shell is formed with a receiving groove for accommodating the sealing element. The receiving groove is arranged around the through hole and is located at the radial outer side of the through hole. The second shell is fixedly connected with the first shell to extrude the sealing element. The sealing assembly according to the application has good sealing performance, and has the advantages of simple structure, convenient assembly and low processing cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a sealing assembly, a fuel cell system and a vehicle. BACKGROUND

[0002] In the related art, the sealing assembly is usually sealed in the following two ways. First, two matching components of the sealing assembly are matched to realize sealing by setting a large interference fit. This sealing method is easy to exceed the manual assembly precision range and cannot guarantee the sealing requirement, resulting in that the fuel cell system cannot guarantee safe and stable operation. Second, the busbar and the rubber sealing gasket are integrally injection molded to realize sealing between the busbar and the rubber sealing gasket. However, due to the different expansion coefficients of metal materials and rubber materials, the sealing requirement between the two cannot be guaranteed in the injection molding process. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a sealing assembly, which has good sealing performance and is simple in structure, easy to assemble and low in processing cost.

[0004] The present application also provides a fuel cell system having the above sealing assembly.

[0005] The present application also provides a vehicle having the above fuel cell system.

[0006] According to the sealing assembly of the first aspect of the present application, the sealing assembly is used in a battery system and includes a first housing, a plug-in connector and a sealing member. The first housing defines an electric stack space for mounting a battery stack of the battery system, and is formed with a through hole communicating with the electric stack space. The plug-in connector is plugged into the through hole and includes a second housing and a plug-in busbar. The plug-in busbar has a first connecting end and a second connecting end. The first connecting end extends into the electric stack space and is electrically connected to the battery stack. The second connecting end extends out of the electric stack space and is adapted to be electrically connected to a power distribution unit of the battery system. The sealing member is arranged between the first housing and the second housing. At least one of the first housing and the second housing is formed with a receiving groove for accommodating the sealing member. The receiving groove is arranged around the through hole and is located radially outward of the through hole. The second housing is fixedly connected to the first housing to extrude the sealing member.

[0007] According to the sealing assembly, the plug-in part is inserted into the through hole of the first shell, the assembly of the plug-in part and the first shell is facilitated, at least one of the first shell and the second shell is provided with the accommodating groove for accommodating the sealing part, and the installation of the sealing part is facilitated, so that the first shell, the plug-in part and the sealing part are assembled conveniently and simply, the assembly efficiency is high, the working hours are saved, and the manufacturing cost is low. Moreover, the sealing groove is arranged around the through hole and is arranged at the radial outer side of the through hole, and the second shell is connected with the first shell by the fastener to extrude the sealing part, so that the sealing performance between the first shell and the second shell is effectively ensured, and the safe and stable operation of the fuel cell system is ensured.

[0008] In some embodiments, in the radial direction of the through hole, the interval between the peripheral wall of the through hole and the accommodating groove is x, and x is greater than or equal to 5 mm.

[0009] In some embodiments, the first shell and the second shell are provided with a fastener for connecting the first shell and the second shell, in the radial direction of the through hole, the fastener is arranged outside and spaced from the accommodating groove, and the fastener is arranged in the first shell and the second shell along the axial direction of the through hole.

[0010] In some embodiments, the second shell comprises: a plug-in part inserted into the through hole; a stop part arranged around the edge of the plug-in part, the sealing part is arranged between the stop part and the first shell, and the fastener connects the stop part and the first shell.

[0011] In some embodiments, the plug-in busbar is integrally injection molded in the second shell.

[0012] In some embodiments, the sealing assembly further comprises: a connecting busbar connected between the first connecting end and the battery stack, and having a third connecting end and a fourth connecting end, the third connecting end is electrically connected with the first connecting end, and the fourth connecting end is used for electrically connecting with the battery stack; a connecting piece comprising a connecting rod and a first connecting head and a second connecting head arranged at intervals along the length direction of the connecting rod, the first connecting head is adapted to pass through at least the third connecting end and is limitedly fitted in the limiting groove of the second shell, so that the first connecting end and the third connecting end are electrically connected through the connecting rod.

[0013] In some embodiments, the second housing comprises a connecting portion extending into the stack space through the through hole, the connecting portion forms a limiting hole, the limiting hole is arranged along the length direction of the connecting rod and spaced apart from the limiting slot, the connecting rod is arranged in the limiting hole and is in sliding fit with the limiting hole along the length direction of the connecting rod, the limiting hole is used for limiting the connecting member from being separated from the second housing, and when the first connecting head is matched with the limiting slot, the second connecting head is abutted against one side of the limiting hole which is away from the first connecting head.

[0014] According to the fuel cell system of the second aspect of the embodiments of the present application, the stack is arranged in the stack space.

[0015] According to the fuel cell system of the embodiments of the present application, by using the sealing assembly, the fuel cell system can work normally in a high-temperature and high-humidity environment, and the safe and stable operation of the fuel cell system is ensured.

[0016] According to the vehicle of the third aspect of the embodiments of the present application, the fuel cell system of the second aspect of the embodiments of the present application is used.

[0017] According to the vehicle of the embodiments of the present application, by using the fuel cell system, the safe and stable operation of the vehicle is ensured.

[0018] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a schematic view of a sealing assembly according to an embodiment of the present application;

[0021] Figure 2 is Figure 1 is a schematic view of a first housing and a second housing shown in FIG. 1;

[0022] Figure 3 is Figure 2 is a schematic view of a first housing shown in FIG. 2;

[0023] Figure 4 is Figure 1 is a schematic view of a connecting member shown in FIG. 3;

[0024] Figure 5 is Figure 1a schematic view of a first housing, a fitting portion, and a connecting member shown in FIG. 1;

[0025] Figure 6 is Figure 1 an assembly schematic view of a connecting portion, a connecting member, a first connecting end, and a third connecting end shown in FIG. 2.

[0026] Reference Signs:

[0027] a sealing assembly 100,

[0028] a first housing 1, a through hole 110a, a receiving groove 110b,

[0029] a plug-in member 2,

[0030] a second housing 21, a fitting portion 211, a stop portion 212, a connecting portion 213,

[0031] a limiting groove 211a, a limiting hole 211b, a first mounting hole 211c, a second mounting hole 211d,

[0032] a plug-in busbar 22, a first positive electrode wiring row 221, a first negative electrode wiring row 222,

[0033] a first connecting end 22a, a second connecting end 22b,

[0034] a sealing member 3, a fastener 4,

[0035] a connecting busbar 5, a second positive electrode wiring row 51, a second negative electrode wiring row 52,

[0036] a third connecting end 5a, a fourth connecting end 5b,

[0037] a connecting member 6, a connecting rod 61, a first connecting head 62, a second connecting head 63. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, for the purpose of explanation, and are not to be understood as limiting the present application.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0040] Hereinafter, with reference to the accompanying drawings, a sealing assembly 100 according to an embodiment of the present invention will be described. The sealing assembly 100 can be used in a battery system, such as a fuel cell system.

[0041] like Figure 1 As shown, the sealing assembly 100 includes a first housing 1, within which a battery stack space is defined. The battery stack space is used to install the battery stack of the battery system, and the battery stack can provide the required voltage. The first housing 1 has a through-hole 110a communicating with the battery stack space. The through-hole 110a can penetrate the sidewall of the first housing 1 along its wall thickness direction, allowing the battery stack space to communicate with the outside environment.

[0042] The sealing assembly 100 also includes a connector 2, which is inserted into the through port 110a. The through port 110a can limit the connector 2 to a certain extent, facilitating the assembly of the connector 2 with the first housing 1. The connector 2 is fixedly connected to the first housing 1, and the connector 2 includes a second housing 21 and a connector bus 22. The connector bus 22 has a first connection end 22a and a second connection end 22b. The first connection end 22a extends into the battery stack space and is electrically connected to the battery stack. The second connection end 22b extends out of the battery stack space and is suitable for electrical connection with the power distribution unit of the battery system. Thus, the connector 2 can be used to realize the electrical connection between the battery stack and the power distribution unit.

[0043] For example, the plug-in bus 22 may include a first positive terminal block 221 and a first negative terminal block 222. The first positive terminal block 221 has a first connection end 22a and a second connection end 22b. The first negative terminal block 222 also has a first connection end 22a and a second connection end 22b. The first connection end 22a of the first positive terminal block 221 can be electrically connected to the positive connection end of the battery stack, and the second connection end 22b of the first positive terminal block 221 can be electrically connected to the corresponding connection end of the power distribution unit. The first connection end 22a of the first negative terminal block 222 can be electrically connected to the negative connection end of the battery stack, and the second connection end 22b of the first negative terminal block 222 can be electrically connected to the corresponding connection end of the power distribution unit.

[0044] As shown in Figure 1 The sealing assembly 100 further comprises a sealing member 3 arranged between the first housing 1 and the second housing 21, which can be used to seal the gap between the first housing 1 and the second housing 21 to ensure the sealing performance of the first housing 1 and the second housing 21. At least one of the first housing 1 and the second housing 21 is provided with a receiving groove 110b for accommodating the sealing member 3, which includes the following schemes: 1. The first housing 1 is provided with a receiving groove 110b for accommodating the sealing member 3, and the second housing 21 is not provided with a receiving groove 110b; 2. The second housing 21 is provided with a receiving groove 110b for accommodating the sealing member 3, and the first housing 1 is not provided with a receiving groove 110b; 3. The first housing 1 and the second housing 21 are respectively provided with a receiving groove 110b for accommodating the sealing member 3. Thus, the receiving groove 110b can limit the sealing member 3 to some extent to avoid the movement of the sealing member 3 during assembly or long-term use, effectively ensure the sealing performance between the first housing 1 and the second housing 21, and facilitate the installation of the sealing member 3.

[0045] It can be understood that the sealing member 3 is one or more, and the receiving groove 110b is one or more. When the sealing member 3 is multiple, the multiple sealing members 3 can be arranged at intervals along the radial direction of the through hole 110a. One sealing member 3 can correspond to the receiving groove 110b of the first housing 1 and / or the receiving groove 110b of the second housing 21. When the first housing 1 and the second housing 21 are respectively provided with receiving grooves 110b, the receiving grooves 110b on the first housing 1 and the second housing 21 correspond to each other to accommodate the same sealing member 3, and / or the receiving grooves 110b on the first housing 1 and the second housing 21 are used to accommodate different sealing members 3.

[0046] The receiving groove 110b is arranged around the through hole 110a, the receiving groove 110b extends along the circumference of the through hole 110a to form an annular groove, the sealing member 3 is formed as an annular sealing member 3, the receiving groove 110b is arranged radially outward of the through hole 110a, the second housing 21 is fixedly connected to the first housing 1 to press the sealing member 3, so that the sealing member 3 deforms to better seal the gap between the first housing 1 and the second housing 21, and at the same time, the sealing contact surface pressure between the first housing 1 and the second housing 21 is greater than the internal pressure of the stack space, so as to avoid the humid air and gas molecules in the stack space from entering the fuel cell system through the gap between the first housing 1 and the second housing 21, which affects the normal work of the electronic components, and also avoids the humid air or water outside the stack space from entering the stack space, so that the stack assembly meets the IP67 test requirements, thereby ensuring the safe and stable operation of the fuel cell system.

[0047] It should be noted that, in the description of the present application, the axial direction of the through hole 110a is the extension direction of the central axis of the through hole 110a, the radial direction of the through hole 110a is perpendicular to the axial direction of the through hole 110a, and the radial direction of the through hole 110a passes through the central axis of the through hole 110a in the radial plane of the through hole 110a, and the radial plane of the through hole 110a is perpendicular to the central axis of the through hole 110a.

[0048] According to the sealing assembly 100 of the embodiment of the present application, the plug-in part 2 is inserted into the through hole 110a of the first shell 1, which facilitates the assembly of the plug-in part 2 and the first shell 1, and at least one of the first shell 1 and the second shell 21 is provided with a containing groove 110b for accommodating the sealing part 3, which facilitates the installation of the sealing part 3. Therefore, the first shell 1, the plug-in part 2 and the sealing part 3 are easy to assemble, simple, high in assembly efficiency, time-saving, and labor-saving, and low in manufacturing cost. Moreover, since the sealing groove is arranged around the through hole 110a and is spaced apart from the radial outside of the through hole 110a, and the second shell 21 is connected to the first shell 1 to press the sealing part 3, the sealing performance between the first shell 1 and the second shell 21 can be effectively guaranteed, so that the sealing assembly 100 can work normally in a high-temperature and high-humidity environment, ensuring the safe and stable operation of the fuel cell system. At the same time, under the premise of ensuring the sealing performance of the first shell 1 and the second shell 21, the requirement for the machining precision of the first shell 1 and the second shell 21 is reduced, which facilitates assembly and further reduces the machining cost. At the same time, it is convenient to avoid sealing failure of the sealing part 3, and the operation is simple and convenient.

[0049] Optionally, the power distribution unit is a current conversion device, for example, the power distribution unit is a DCDC converter.

[0050] For example, in the example of Figure 1 and Figure 2 , the first shell 1 is provided with the containing groove 110b, the second shell 21 is not provided with the containing groove 110b, and the sealing part 3 is an O-shaped sealing ring. In the radial direction of the through hole 110a, the width of the containing groove 110b is equal to the diameter of the sealing part 3, and in the axial direction of the through hole 110a, the depth of the containing groove 110b is less than the diameter of the sealing part 3. For example, the diameter of the sealing part 3 is 4mm, the width of the containing groove 110b is 4mm, and the depth of the containing groove 110b is 3mm.

[0051] In some embodiments of the present application, as Figure 3As shown, in the radial direction of the through hole 110a, the spacing between the peripheral wall of the through hole 110a and the accommodating groove 110b is x, x≥5mm, so as to facilitate ensuring that the edge portion of the through hole 110a has sufficient bearing capacity, so that the portion of the first shell 1 located at the edge of the through hole 110a can more uniformly extrude the sealing element 3, and ensure that the sealing element 3 is uniformly stressed on the pressure surface, so as to ensure the sealing effect.

[0052] Optionally, in Figure 3 the example, the through hole 110a is formed as a square opening, and the accommodating groove 110b extends as a square ring-shaped groove, and the four corners of the accommodating groove 110b respectively have a round corner transition portion, and the radius r of the round corner transition portion is greater than or equal to 16mm, so as to ensure that the radial spacing between the peripheral wall of the through hole 110a and the corresponding position of the accommodating groove 110b is greater than 5mm. Of course, the shape of the through hole 110a is not limited to a square shape, and for example, can also be a circular shape, an elliptical shape, a triangular shape, and other polygonal shapes, etc.

[0053] In some embodiments, as Figure 1 and Figure 6 shown, the plug-in busbar 22 includes a first positive electrode wiring row 221 and a first negative electrode wiring row 222, and the first positive electrode wiring row 221 and the first negative electrode wiring row 222 are arranged in a direction inclined with respect to the extension direction of the edge of the through hole 110a, so that the first positive electrode wiring row 221 and the first negative electrode wiring row 222 are arranged in a staggered manner, and under the premise of ensuring that the first positive electrode wiring row 221 and the first negative electrode wiring row 222 have sufficient insulation distance, the occupied space of the plug-in busbar 22 can be appropriately reduced, and the volume of the plug-in element 2 is reduced, facilitating the lightweight and integrated arrangement of the sealing assembly 100.

[0054] For example, in Figure 1 the example, the through hole 110a is formed as a square opening, and the first positive electrode wiring row 221 and the first negative electrode wiring row 222 can be arranged in the diagonal extension direction of the square opening, so as to realize the staggered arrangement of the first positive electrode wiring row 221 and the first negative electrode wiring row 222.

[0055] In some embodiments of the present application, as Figure 1As shown, the first shell 1 and the second shell 21 are provided with fasteners 4 to connect the first shell 1 and the second shell 21, in the radial direction of the through hole 110a, the fasteners 4 are located outside the accommodating groove 110b, and the fasteners 4 are spaced apart from the accommodating groove 110b in the radial direction of the through hole 110a, so that the distance between the fasteners 4 and the peripheral wall of the through hole 110a is relatively far, avoiding the edge part of the through hole 110a being easily crushed, damaged, etc., and at the same time, even if the sealing element 3 is separated from the accommodating groove 110b, the fasteners 4 can still limit the sealing element 3, to avoid the sealing element 3 from being separated from the cooperation with the first shell 1 and the second shell 21, and improve the installation reliability of the sealing element 3.

[0056] Optionally, in Figure 1 Examples, the fastener 4 is a threaded fastener 4, such as a bolt, a screw, etc.

[0057] In some embodiments of the present application, as Figure 1 shown, the fasteners 4 are arranged along the axial direction of the through hole 110a between the first shell 1 and the second shell 21, so that the fastening force of the fasteners 4 applied to the first shell 1 and the second shell 21 is parallel to the axial direction of the through hole 110a, thereby making the first shell 1 and the second shell 21 better extrude the sealing element 3, so that the sealing element 3 is deformed enough to seal the gap between the first shell 1 and the second shell 21, which is beneficial to improve the sealing performance of the sealing assembly 100.

[0058] Of course, the present application is not limited thereto; in other embodiments, the fasteners 4 can also connect the first shell 1 and the second shell 21 in a direction inclined to the axial direction of the through hole 110a, so that the fastening force of the fasteners 4 applied to the first shell 1 and the second shell 21 has a component parallel to the axial direction of the through hole 110a, and the first shell 1 and the second shell 21 can also extrude the sealing element 3 to ensure the sealing performance of the sealing assembly 100.

[0059] In some embodiments of the present application, as Figure 1 and Figure 2As shown, the second shell 21 comprises a plug-in portion 211 and a stop portion 212, the plug-in portion 211 is plugged into the through hole 110a, facilitating the assembly limiting of the first shell 1 and the second shell 21, meanwhile, the part of the plug-in portion 211 extending into the stack space can play a certain protective role on the part of the plug-in busbar 22 extending into the stack space; the stop portion 212 is arranged around the edge of the plug-in portion 211, then the stop portion 212 can be formed as an annular structure, the stop portion 212 is adapted to abut against the edge portion of the through hole 110a, the sealing element 3 is arranged between the stop portion 212 and the first shell 1, then the side of the stop portion 212 facing the first shell 1 and / or the side of the first shell 1 facing the stop portion 212 is formed with a receiving groove 110b, and the fastener 4 connects the stop portion 212 and the first shell 1 to realize the fixed connection of the plug-in element 2 and the first shell 1.

[0060] In some embodiments, the surface roughness of the surface of the stop portion 212 and the first shell 1 contacting each other is s, s≤1.2, that is, the surface roughness of the surface of the stop portion 212 contacting the first shell 1 is less than or equal to 1.2, and the surface roughness of the surface of the first shell 1 contacting the stop portion 212 is less than or equal to 1.2, avoiding that the sealing element 3 pressed is difficult to seal the gap between the stop portion 212 and the first shell 1 due to the too rough surface of the surface of the stop portion 212 and the first shell 1 contacting each other, thereby avoiding the influence of the surface roughness of the surface of the stop portion 212 and the first shell 1 contacting each other on the sealing performance of the sealing assembly 100, and ensuring the sealing reliability of the stop portion 212 and the first shell 1.

[0061] It can be understood that the surface roughness of the surface of the stop portion 212 contacting the first shell 1 can be equal to or different from the surface roughness of the surface of the first shell 1 contacting the stop portion 212. For example, the surface roughness of the surface of the stop portion 212 and the first shell 1 contacting each other is 0.8.

[0062] In some optional embodiments, the plug-in busbar 22 is integrally injection molded on the second shell 21, that is, the plug-in busbar 22 and the second shell 21 are integrally injection molded by an injection molding process, effectively ensuring the sealing performance between the plug-in busbar 22 and the second shell 21, thereby further avoiding the water vapor and the like in the stack space from entering the inside of the fuel cell system through the gap between the plug-in busbar 22 and the second shell 21, and affecting the normal work of the electronic components, and further avoiding the external water vapor and the like from entering the stack space through the gap between the plug-in busbar 22 and the second shell 21, thereby improving the sealing performance of the stack assembly.

[0063] For example, the plug-in busbar 22 is a copper bar (for example, a soft copper bar), and the second shell 21 is a hard material piece, for example, the second shell 21 is a hard plastic piece, and the like. When the second shell 21 is a hard plastic piece, the structural rigidity of the second shell 21 can be increased to ensure that the second shell 21 completely extrudes the sealing piece 3 into the accommodating groove 110b under the action of the fastener 4, while ensuring the insulation performance of the stack assembly, so as to meet the electrical insulation requirement and ensure the safety in use.

[0064] In some embodiments of the present application, as shown in Figure 1 The sealing assembly 100 further includes a connecting busbar 5 and a connecting piece 6, the connecting busbar 5 is connected between the first connecting end 22a and the battery stack to realize the electrical connection between the plug-in part 2 and the battery stack, and the connecting busbar 5 has a third connecting end 5a and a fourth connecting end 5b, the third connecting end 5a is electrically connected with the first connecting end 22a, and the fourth connecting end 5b is used to be electrically connected with the battery stack.

[0065] In some embodiments of the present application, as shown in Figures 4-6 The connecting piece 6 includes a connecting rod 61, a first connecting head 62 and a second connecting head 63, the first connecting head 62 and the second connecting head 63 are spaced apart along the length direction of the connecting rod 61, the second shell 21 forms a limiting groove 211a, and the first connecting head 62 is adapted to at least pass through the third connecting end 5a and be limitedly fitted in the limiting groove 211a, so that the connecting piece 6 is fixedly arranged on the second shell 21, and the connecting rod 61 passes through the first connecting end 22a and the third connecting end 5a, and the first connecting end 22a and the third connecting end 5a are electrically connected through the connecting rod 61 to ensure the smooth conduction of current.

[0066] The first connecting head 62 is adapted to at least pass through the third connecting end 5a and be limitedly fitted in the limiting groove 211a, including the following schemes: 1, the first connecting head 62 is adapted to pass through the third connecting end 5a and be limitedly fitted in the limiting groove 211a, obviously, whether the first connecting head 62 is fitted in the limiting groove 211a or separated from the limiting groove 211a, whether the first connecting head 62 passes through the third connecting end 5a or not, the connecting piece 6 is always electrically connected with the first connecting end 22a, for example, the connecting rod 61 always passes through the first connecting end 22a; 2, the first connecting head 62 is adapted to pass through the third connecting end 5a and the first connecting end 22a and be limitedly fitted in the limiting groove 211a, then in the process of moving the first connecting head 62 towards the limiting groove 211a, the first connecting head 62 can pass through the third connecting end 5a first and then pass through the first connecting end 22a, or pass through the first connecting end 22a first and then pass through the third connecting end 5a,

[0067] For example, in Figures 4-6In the example shown in FIG. 1, the second housing 21 is formed with a first mounting hole 211c and a second mounting hole 211d, the connecting piece 6 is arranged in the first mounting hole 211c, a limiting groove 211a is formed on the hole wall of the first mounting hole 211c and recessed by the hole wall of the first mounting hole 211c, the second mounting hole 211d is formed around the first mounting hole 211c and penetrates the entire hole wall of the first mounting hole 211c and the corresponding surface of the second housing 21, the third connecting end 5a extends into the second mounting hole 211d and is axially opposite to the first mounting hole 211c; the connecting piece 6 can be arranged in the first mounting hole 211c from the side of the second mounting hole 211d away from the limiting groove 211a and gradually move towards the limiting groove 211a until the first connecting head 62 is limitedly fitted in the limiting groove 211a.

[0068] The plug-in busbar 22 includes a first positive electrode wiring row 221 and a first negative electrode wiring row 222, the connecting busbar 5 includes a second positive electrode wiring row 51 and a second negative electrode wiring row 52, the second positive electrode wiring row 51 has the third connecting end 5a and the fourth connecting end 5b, and the second negative electrode wiring row 52 has the third connecting end 5a and the fourth connecting end 5b; the first connecting end 22a of the first positive electrode wiring row 221 and the third connecting end 5a of the second positive electrode wiring row 51 are electrically connected through the connecting rod 61, and the first connecting end 22a of the first negative electrode wiring row 222 and the third connecting end 5a of the second negative electrode wiring row 52 are electrically connected through the connecting rod 61.

[0069] Therefore, by arranging the connecting piece 6 in the limiting groove 211a, the installation efficiency of the connecting piece 6 can be improved, and the connection efficiency of the first connecting end 22a and the third connecting end 5a can be improved; compared with the conventional technology in which the outer peripheral wall of the connecting piece is formed with external threads, a pre-tightening force is applied by a torque wrench or the like to connect the connecting piece to the plug-in piece, so as to realize the electrical connection between the first connecting end and the third connecting end, in the present application, the arrangement of the connecting piece 6 facilitates the installation of the connecting piece 6, the process of applying torque to the connecting piece 6 can be omitted, the operation convenience is improved, the assembly time is saved, and the assembly efficiency is improved.

[0070] For example, as shown in FIG. 1, Figure 4As shown, in the radial direction of the connecting rod 61, at least part of the outer contour of the first connecting head 62 is located radially outside the outer contour of the connecting rod 61, and at least part of the outer contour of the second connecting head 63 is located radially outside the outer contour of the connecting rod 61. For example, the outer contours of the connecting rod 61, the first connecting head 62 and the second connecting head 63 are all circular, and the diameters of the first connecting head 62 and the second connecting head 63 are both greater than the diameter of the connecting rod 61. The first connecting end 22a and the third connecting end 5a are respectively provided with connecting holes, and the first connecting head 62 passes through the connecting holes of the first connecting end 22a and the third connecting end 5a, so that the connecting rod 61 is arranged in the connecting holes, and the hole walls of the connecting holes are tightly fitted with the connecting rod 61, so as to ensure that the first connecting end 22a and the third connecting end 5a are reliably electrically connected with the connecting rod 61. The limiting groove 211a can limit the movement of the connecting piece 6 in the length direction, so that the connecting piece 6 is stably installed on the second shell 21, and the connection of the first connecting end 22a and the third connecting end 5a is reliable.

[0071] The longitudinal section shape of the first connecting head 62 and the longitudinal section shape of the second connecting head 63 can be specifically set according to actual application, for example, the longitudinal section outer contour of the first connecting head 62 and the longitudinal section outer contour of the second connecting head 63 can be arc-shaped, and of course the longitudinal section of the first connecting head 62 and the longitudinal section of the second connecting head 63 can also be polygonal and the like.

[0072] Optionally, in the example of Figure 1 The connecting holes of the first connecting end 22a and the third connecting end 5a can be formed as long strip-shaped holes (for example, long circular holes and the like), so that when the first connecting head 62 passes through the connecting holes, the first connecting head 62 can extrude the hole walls of the connecting holes outward, so that the connecting holes are deformed, and the first connecting head 62 is smoothly passed through. After the first connecting head 62 passes through the connecting holes, the connecting rod 61 is arranged in the connecting holes, and the connecting holes have a tendency to restore to the original shape, so that the hole walls of the connecting holes are tightly fitted with the outer peripheral wall of the connecting rod 61, so as to ensure reliable connection. In addition, by setting the connecting holes as long strip-shaped holes, it is beneficial to increase the assembly operation space of the operator, reduce the processing cost of the first connecting end 22a and the third connecting end 5a, and improve the market competitiveness of the product.

[0073] Optionally, the first connecting end 22a, the second connecting end 22b, the third connecting end 5a and the fourth connecting end 5b are all sheet metal parts.

[0074] Optionally, in the example of Figure 1 The connecting busbar 5 is a soft copper bar, and the connecting busbar 5 has a certain flexibility, so as to facilitate the flexible arrangement of the plug-in connector 2 and the battery stack, and realize the diversified structure design of the sealing assembly 100.

[0075] In some embodiments, asFigure 5 and Figure 6 As shown in the drawings, the second shell 21 comprises a connecting portion 213, the connecting portion 213 extends into the stack space through the through hole 110a, the connecting portion 213 forms a limiting hole 211b, the limiting hole 211b is arranged along the length direction of the connecting rod 61, the connecting rod 61 is arranged in the limiting hole 211b, and the connecting rod 61 and the limiting hole 211b are in sliding fit along the length direction of the connecting rod 61, so that the connecting rod 61 can move along the length direction of the connecting rod 61 relative to the limiting hole 211b; the limiting hole 211b is used to limit the connecting piece 6 from being separated from the second shell 21, so that the connecting rod 61 can always be arranged in the limiting hole 211b, and under the premise that the connecting piece 6 can move relative to the limiting hole 211b to realize the cooperation and separation of the first connecting head 62 and the limiting groove 211a, the limiting hole 211b can limit the first connecting head 62 from passing through the limiting hole 211b to cause the connecting piece 6 to be separated from the second shell 21, so that the operator can no longer need to find other connecting components such as bolts when assembling the sealing assembly 100, the assembly time is effectively saved, the labor cost is reduced, and the production efficiency is improved.

[0076] When the first connecting head 62 cooperates with the limiting groove 211a, the second connecting head 63 abuts against one side of the limiting hole 211b away from the second connecting head 63, and then the second connecting head 63 directly or indirectly abuts against one side of the limiting hole 211b away from the first connecting head 62, because the limiting hole 211b can limit the second connecting head 63 from passing through the limiting hole 211b, so that the connecting piece 6 can exert the assembly force through the first connecting head 62 and the second connecting head 63, and the assembly of the connecting piece 6 and the second shell 21 is reliable.

[0077] For example, in Figure 1 , Figure 5 and Figure 6In the example shown in FIG. 1, the second housing 21 is formed with a first mounting hole 211c and a second mounting hole 211d, the connecting piece 6 is arranged in the first mounting hole 211c, the first mounting hole 211c includes a limiting hole 211b, and the limiting hole 211b is located at one end of the first mounting hole 211c away from the limiting groove 211a; the connecting busbar 5 includes a second positive electrode connecting busbar 51 and a second negative electrode connecting busbar 52, the second positive electrode connecting busbar 51 has a third connecting end 5a and a fourth connecting end 5b, and for the connecting piece 6 corresponding to the second positive electrode connecting busbar 51, the first connecting head 62 and the limiting hole 211a are respectively located on the two sides of the corresponding third connecting end 5a and the first connecting end 22a, then the second connecting head 63 directly abuts against one side of the limiting hole 211b away from the first connecting head 62, and the first connecting head 62 is adapted to pass through the third connecting end 5a and the first connecting end 22a and is limitedly fitted in the limiting groove 211b; for the connecting piece 6 of the second negative electrode connecting busbar 52, the limiting hole 211a is located between the corresponding third connecting end 5a and the first connecting end 22a, then the second connecting head 63 indirectly abuts against one side of the limiting hole 211b away from the first connecting head 62 through the first connecting end 22a, and the first connecting head 62 is adapted to pass through the third connecting end 5a and is limitedly fitted in the limiting groove 211b.

[0078] According to the fuel cell system of the second aspect of the present application, the fuel cell system can work normally in a high-temperature and high-humidity environment, and the fuel cell system can be ensured to work safely and stably.

[0079] According to the fuel cell system of the present application, by using the sealing assembly 100, the fuel cell system can work normally in a high-temperature and high-humidity environment, and the fuel cell system can be ensured to work safely and stably.

[0080] Optionally, the fuel cell system is an FTXT FS04 fuel cell system.

[0081] According to the vehicle of the third aspect of the present application, the fuel cell system of the second aspect of the present application is used, and the vehicle can be ensured to work safely and stably.

[0082] According to the vehicle of the present application, by using the fuel cell system, the vehicle can be ensured to work safely and stably.

[0083] Other configurations and operations of the vehicle according to the present application are known to those skilled in the art, and will not be described in detail here.

[0084] In the description of the application, it is required to understand that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the application. In addition, the features defined with "first", "second" can be explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0085] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0086] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0087] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A seal assembly (100) characterized by, The sealing assembly (100) is used for a battery system and comprises: a first shell (1) defining a stack space inside for mounting a battery stack of the battery system, the first shell (1) being formed with a through opening (110a) communicating with the stack space; a plug-in member (2) plugged into the through opening (110a) and comprising a second shell (21) and a plug-in busbar (22) having a first connecting end (22a) extending into the stack space and electrically connected with the battery stack and a second connecting end (22b) extending out of the stack space and adapted to be electrically connected with a power distribution unit of the battery system; a sealing member (3) arranged between the first shell (1) and the second shell (21), at least one of the first shell (1) and the second shell (21) being formed with a receiving groove (110b) for accommodating the sealing member (3), the receiving groove (110b) being arranged around the through opening (110a) and radially outside the through opening (110a), the second shell (21) being fixedly connected with the first shell (1) to extrude the sealing member (3); further comprising: a connecting busbar (5) connected between the first connecting end (22a) and the battery stack and having a third connecting end (5a) electrically connected with the first connecting end (22a) and a fourth connecting end (5b) for electrically connecting with the battery stack; a connecting member (6) comprising a connecting rod (61) and first and second connecting heads (62, 63) spaced apart along the length direction of the connecting rod (61), the first connecting head (62) being adapted to at least pass through the third connecting end (5a) and be positionally fitted into a limiting groove (211a) of the second shell (21), and the connecting rod (61) being arranged through the first connecting end (22a) and the third connecting end (5a) so that the first connecting end (22a) and the third connecting end (5a) are electrically connected through the connecting rod (61).

2. The seal assembly (100) of claim 1, wherein, In the radial direction of the through opening (110a), the spacing between the peripheral wall of the through opening (110a) and the receiving groove (110b) is x, x≥5mm.

3. The seal assembly (100) of claim 1, wherein, A fastener (4) is arranged between the first shell (1) and the second shell (21) to connect the first shell (1) and the second shell (21), in the radial direction of the through opening (110a), the fastener (4) is located outside the receiving groove (110b) and spaced apart from the receiving groove (110b), and the fastener (4) is arranged through the first shell (1) and the second shell (21) along the axial direction of the through opening (110a).

4. The seal assembly (100) of claim 1, wherein, The second shell (21) comprises: A plug-in portion (211) is plugged into the through hole (110a); A stop portion (212) is arranged around the edge of the plug-in portion (211), the sealing member (3) is arranged between the stop portion (212) and the first housing (1), and a fastener (4) connects the stop portion (212) and the first housing (1).

5. The seal assembly (100) of claim 1, wherein, The plug-in busbar (22) is integrally injection molded in the second housing (21).

6. The seal assembly (100) of claim 1, wherein, The second housing (21) comprises: A connecting portion (213) extends into the stack space through the through hole (110a), the connecting portion (213) forms a limiting hole (211b) which is arranged along the length direction of the connecting rod (61) and is spaced from the limiting groove (211a), the connecting rod (61) is arranged in the limiting hole (211b) and is slidingly fitted along the length direction of the connecting rod (61), the limiting hole (211b) is used to limit the connecting member (6) from being separated from the second housing (21), when the first connecting head (62) is fitted in the limiting groove (211a), the second connecting head (63) is abutted on the side of the limiting hole (211b) which is away from the first connecting head (62).

7. A fuel cell system characterized by comprising: Comprise: A battery stack; The sealing assembly (100) according to any one of claims 1-6, the battery stack is installed in the stack space.

8. A vehicle characterized by comprising: Comprise the fuel cell system according to claim 7.

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