Battery pack box body, battery pack and vehicle

Abstract

The utility model relates to the technical field of automobiles, in particular to a battery pack box body, a battery pack and a vehicle. The battery pack box body comprises a frame body assembly, the frame body assembly is provided with a plurality of connecting structures, and all the connecting structures are used for being fixedly connected with a frame component. Therefore, the battery pack box body can be specifically arranged according to the number of the battery cells required to be accommodated in the battery pack box body. And the size of the device does not need to be increased to adapt to a threshold beam of the vehicle. Therefore, on one hand, the volume of the battery pack box body is reduced, and materials required for processing the battery pack box body are reduced. And on the other hand, the internal space of the battery pack can be matched with the required number of the battery cells, and no additional filler is needed, so that the self weight of the battery pack is reduced, and the load of a vehicle carrying the battery pack is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a battery pack housing, a battery pack, and a vehicle. Background Technology

[0002] Current new energy vehicles generally have two door sill beams. As a core component of new energy vehicles, the battery pack is usually directly and fixedly connected to the two door sill beams.

[0003] In low-range new energy vehicles, the number of battery cells in the battery pack is generally relatively small. If low-range and high-range new energy vehicles use the same size battery pack housing, it will result in a large amount of unused space inside the battery pack housing, which can easily affect the stability of the battery pack structure. If the external dimensions of the battery pack housing are reduced to accommodate the change in the number of cells, the battery pack housing will not fit the existing vehicle body. To avoid this situation, technicians add filler to the inside of the existing battery pack housing to fill the unused space. However, the battery pack housing itself still occupies a large amount of space and has a significant weight, and the filler will further increase the vehicle's load. Utility Model Content

[0004] This utility model provides a battery pack housing, a battery pack, and a vehicle to solve the technical problems of heavy weight and large space occupation of battery pack housings in low-range new energy vehicles in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a battery pack housing, the battery pack housing comprising:

[0006] The frame assembly is provided with multiple connection structures, all of which are used for fixed connection with the vehicle frame components.

[0007] Optionally, the battery pack housing includes a sealing assembly;

[0008] The connection structure includes a connection hole; the sealing assembly is sealed and installed at the opening of the connection hole.

[0009] Optionally, the sealing assembly includes a cylinder, a sealing ring, and threaded components;

[0010] The cylindrical body is sealed and installed on the frame assembly. The first end of the cylindrical body is sealed and connected to the opening of the connecting hole, and the second end of the cylindrical body is threaded and connected to the threaded component. The sealing ring is sealed and disposed between the threaded component and the second end of the cylindrical body.

[0011] Optionally, the cylindrical body is sealed and welded to the frame assembly.

[0012] Optionally, the frame assembly includes a first structural member;

[0013] Along the first direction, there are two of the first structural members spaced apart;

[0014] The first structural member includes a first part and a second part; along the first direction, the first parts of two first structural members are adjacent to each other; the thickness of the first part is not less than the thickness of the second part.

[0015] Optionally, the battery pack housing includes a cover plate;

[0016] The cover plate is disposed between the two first structural members, and one side of the cover plate along the thickness direction is coplanar with one side of the first structural member along the thickness direction.

[0017] Optionally, the junction between the cover plate and the first structural member is filled with sealant.

[0018] Optionally, the battery pack housing includes a base plate;

[0019] The frame assembly includes a second structural member connected between two first structural members; two second structural members are spaced apart along a second direction; the first direction intersects the second direction;

[0020] The base plate and the cover plate are respectively disposed on both sides of the first structural member and the second structural member along the thickness direction; the base plate, the cover plate, the first structural member, and the second structural member form a receiving cavity.

[0021] Optionally, the frame assembly includes a third structural member;

[0022] The third structural member is located within the receiving cavity, and the third structural member is connected between two first structural members or between two second structural members;

[0023] The connection structure includes a threaded hole, which is disposed on the third structural member. The cover plate is provided with a clearance hole opposite to the threaded hole. The threaded hole and the clearance hole are used to be fixedly connected to the frame component by fasteners.

[0024] Secondly, this utility model provides a battery pack, which includes battery cells and a battery pack housing as described above, wherein the battery cells are disposed within the battery pack housing.

[0025] Thirdly, this utility model embodiment provides a vehicle, the vehicle including a frame component and a battery pack housing as described above, the battery pack housing being fixedly connected to the frame component.

[0026] Optionally, the vehicle includes a sealing gasket, the frame component is a crossbeam, and the battery pack housing is fixedly connected to the crossbeam.

[0027] Compared with prior art, the present invention has the following advantages:

[0028] The battery pack housing provided in this embodiment includes a frame assembly. The frame assembly has multiple connecting structures, all of which are used for fixed connection to at least one of the vehicle frame components. During installation, the battery pack housing does not need to be mounted to the door sill beam. This allows the battery pack housing to be specifically configured according to the number of battery cells it needs to accommodate, eliminating the need to increase its size to fit the vehicle's door sill beam. This reduces the size of the battery pack housing and the amount of material required for its fabrication. Furthermore, it allows the internal space of the battery pack housing to be matched to the required number of battery cells without the need for additional filler, thus reducing the weight of the battery pack and consequently reducing the load on the vehicle carrying the battery pack housing.

[0029] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0031] Figure 1 This is a schematic diagram showing the connection between a portion of the vehicle body and the battery pack described in this application;

[0032] Figure 2 This is an exploded view of the sealing assembly of the battery pack housing described in this application;

[0033] Figure 3 This is a cross-sectional schematic diagram of the sealing assembly of the battery pack housing described in this application;

[0034] Figure 4 This is an isometric view of the battery pack housing and sealing gasket described in this application;

[0035] Figure 5 for Figure 4 Exploded view;

[0036] Figure 6 for Figure 4 A bottom view;

[0037] Figure 7This is an axonometric view of part of the vehicle body and battery pack described in this application;

[0038] Figure 8 for Figure 7 A bottom view;

[0039] Figure 9 for Figure 7 Exploded view;

[0040] Figure 10 This is a partial cross-sectional view of part of the vehicle body and battery pack described in this application.

[0041] Reference numerals: 1. Battery pack housing; 11. Frame assembly; 111. Connecting structure; 111a. Connecting hole; 111b. Threaded hole; 112. First structural component; 1121. First part; 1122. Second part; 113. Second structural component; 114. Third structural component; 12. Sealing assembly; 121. Cylinder; 1211. Outer stepped surface; 1212. Inner stepped surface; 122. Sealing ring; 123. Threaded component; 1231. Annular groove; 13. Cover plate; 131. Clearance hole; 14. Base plate; 15. Receiving cavity; 2. Fastener; 3. Sill beam; 31. Body panel; 4. Frame component; 41. Crossbeam; 5. Sealing gasket; X - First direction; Y - Second direction. Detailed Implementation

[0042] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0043] With technological advancements, in some new energy vehicles, the battery pack can now be directly integrated into the vehicle body, achieving higher space utilization, better structural strength, and a lighter design. Compared to traditional battery pack designs, this further optimizes the integration of the battery pack with the vehicle body. The battery pack is no longer a separate module but is directly integrated into the chassis or body. The upper and lower battery covers are integrated with the vehicle floor or chassis structure to form a unibody design. This significantly improves the internal space utilization of new energy vehicles, while also increasing the energy density of the battery pack and saving interior space. The battery pack itself becoming part of the vehicle body also improves its structural strength and reduces the overall vehicle weight, contributing to increased driving range and energy efficiency.

[0044] However, because the battery pack is integrated into the vehicle body, changes in the battery pack size can easily lead to adaptive changes in the vehicle body as well. (See reference...) Figure 7 , Figure 8 and Figure 9 Existing new energy vehicles generally have two sill beams 3 and a frame component 4. The frame component 4 can be a crossbeam 41 connecting the two sill beams 3, or a longitudinal beam located between the two sill beams 3. When the battery pack is integrated into the vehicle body, it is usually directly fixedly connected to the two sill beams 3. Specifically, the battery pack housing has two mounting ears, which are fixedly connected to the bottom of the sill beams 3 using bolts or other fasteners, so that the battery pack can be suspended below the sill beams 3.

[0045] In low-range new energy vehicles, the number of battery cells in the battery pack is usually small. If the aforementioned battery pack housing, which is fixedly connected to the sill beam 3, is continued to be used, it will result in a large amount of unused space inside the battery pack housing. This can easily affect the stability of the battery pack structure and also lead to a larger volume and weight of the battery pack housing. The amount of material required to process the battery pack housing will increase accordingly, and the vehicle will bear unnecessary loads.

[0046] Reducing the external dimensions of the battery pack enclosure to accommodate the change in the number of battery cells would result in the battery pack enclosure becoming incompatible with existing vehicle models. (See reference...) Figure 10 For example, a body sealing plate 31 is typically installed on the sill beam 3 of the vehicle body, and the body sealing plate 31 is sealed to the battery pack. This prevents water leakage and other problems from occurring inside the vehicle cabin when the battery pack serves as the vehicle floor. If the battery pack housing is reduced in size, the body sealing plate 31 would need to be enlarged accordingly. This would lead to a series of changes in subsequent vehicle body manufacturing and assembly, thereby increasing the production and processing costs of new energy vehicles. At the same time, the reduced battery pack housing is not easily compatible with the existing sill beam 3 of the vehicle body, resulting in poor interchangeability and versatility.

[0047] To avoid this situation, existing technologies typically incorporate internal filler material into the battery pack of low-range new energy vehicles to fill unused space. This filler material is generally made of aluminum alloy or other metal profiles. While this improves the stability of the battery pack, the space occupied and weight of the battery pack remain significant. Furthermore, the filler material further increases the vehicle's load, thus affecting its driving range.

[0048] Therefore, this utility model embodiment provides a battery pack housing 1. See reference... Figure 1 and Figure 10The battery pack housing 1 described in this embodiment of the present invention includes a frame assembly 11. In this embodiment, the frame assembly 11 is a frame-shaped structure used to form the battery pack housing 1 in a horizontal plane. Multiple connecting structures 111 are provided on the frame assembly 11, and all connecting structures 111 are used for fixed connection with the vehicle frame component 4 of the vehicle body. In this embodiment, the position of the connecting structures 111 on the frame assembly 11 depends on the position of the vehicle frame component 4 of the vehicle body. For example, refer to... Figure 9 When the battery pack housing 1 is suspended below the crossbeam 41 of the vehicle body, the connecting structure 111 is preferably positioned vertically opposite the crossbeam 41 of the vehicle body on the frame assembly 11. When the battery pack housing 1 is suspended below the longitudinal beam of the vehicle body, the connecting structure 111 is preferably positioned vertically opposite the longitudinal beam of the vehicle body on the frame assembly 11. Of course, in other examples, the connecting structure 111 may also be positioned in a direction inclined to the vertical direction opposite to the crossbeam 41 or longitudinal beam of the vehicle body. The number of connecting structures 111 on the frame assembly 11 depends on actual needs and may be three, four, five, or even more.

[0049] Since the frame assembly 11 is connected to the vehicle frame component 4 via the connecting structure 111, it no longer needs to be installed on the sill beam 3. Therefore, during the design process, the battery pack housing 1 can be specifically configured according to the number of cells required to be accommodated internally. It avoids increasing its own volume to fit the vehicle's sill beam 3. This helps reduce the volume of the battery pack housing 1, decreases the material required for manufacturing the battery pack housing 1, and simultaneously reduces the weight of the battery pack housing 1. Furthermore, this allows the internal space of the battery pack housing 1 to match the required number of cells, eliminating the need for additional filler, thus further reducing the weight of the battery pack. Therefore, the battery pack using the aforementioned battery pack housing 1 has a relatively small weight and space occupation, which helps reduce the load on the vehicle equipped with this battery pack and increases the vehicle's range.

[0050] refer to Figure 1In some embodiments of this application, the connection structure 111 may specifically be a connection hole 111a. The connection hole 111a is formed on the frame assembly 11 and extends through the frame assembly 11 along its thickness direction, so that the frame assembly 11 can be fixedly mounted on the vehicle frame component 4 of the vehicle body using fasteners 2 such as bolts, screws, and rivets. When the battery pack constitutes the floor of the vehicle, the connection hole 111a formed on the frame assembly 11 can easily lead to leakage problems such as water ingress into the vehicle cabin. Therefore, the battery pack housing 1 also includes a sealing assembly 12. The sealing assembly 12 is sealed at the opening of the connection hole 111a; specifically, the sealing assembly 12 can cover the opening of the connection hole 111a and enclose the fastener 2 within it. In this embodiment, the sealing assembly 12 can be sealed from the side of the battery pack housing 1 facing away from the vehicle cabin to the opening of the connection hole 111a, or it can be sealed from the side of the battery pack housing 1 facing the vehicle cabin to the opening of the connection hole 111a, so as to prevent liquid from entering the vehicle cabin from the connection hole 111a.

[0051] refer to Figure 2 and Figure 3 In some embodiments of this application, the sealing assembly 12 specifically includes a cylinder 121, a sealing ring 122, and a threaded component 123. The first end of the cylinder 121 is sealed to the opening of the connecting hole 111a. During installation, the fastener 2 can pass through the cylinder cavity of the cylinder 121 into the connecting hole 111a. The second end of the cylinder 121 has an internal thread for connection with the threaded component 123. The sealing ring 122 can be fitted onto the unthreaded portion of the threaded component 123, so that after the threaded component 123 is screwed into the second end of the cylinder 121, a seal is achieved between the second end of the cylinder 121 and the threaded component 123. To facilitate the installation of the sealing ring 122, an annular groove 1231 can be formed on the unthreaded portion of the threaded component 123, and the sealing ring 122 is fitted into the annular groove 1231. The sealing assembly 12, consisting of a cylinder 121, a threaded part 123, and a sealing ring 122, has a simple structure and is easy to install. While meeting the installation requirements of the fastener 2, it can effectively seal the fastener 2 and the connection hole 111a.

[0052] In some embodiments of this application, the cylinder 121 is sealed and welded to the frame assembly 11. The welding method between the cylinder 121 and the frame assembly 11 can be laser welding, or it can be argon arc welding, gas shielded welding, resistance welding, etc. The specific welding method between the cylinder 121 and the frame assembly 11 depends on actual needs and will not be elaborated in detail in this embodiment. Sealing and welding the cylinder 121 to the frame assembly 11 simplifies the connection between the cylinder 121 and the frame assembly 11, making it easier to implement; while satisfying the sealing requirement, it also avoids introducing other structures to achieve a sealed connection between the cylinder 121 and the frame assembly 11. To save space, a cavity for accommodating the cylinder 121 can be opened in the frame assembly 11, and the cylinder 121 is inserted into the cavity and fixed by sealing welding. The outer diameter of the first end of the cylinder 121 can be smaller than the other parts of the cylinder 121 to form an outer stepped surface 1211 at the first end of the cylinder 121. During installation, the first end of the cylinder 121 can be sealed and inserted into the connecting hole 111a, and the outer stepped surface 1211 is sealed and connected around the opening of the connecting hole 111a. The diameter of the cylinder cavity at the first end of the cylinder 121 is smaller than that of the other parts of the cylinder 121, so that the cylinder cavity at the first end of the cylinder 121 forms an internal stepped surface 1212. During installation, the fastener 2 is inserted into the connecting hole 111a through the cylinder cavity of the cylinder 121. When the fastener 2 is a bolt, the threaded shank of the bolt can be inserted into the connecting hole 111a through the cylinder cavity, and the bolt head contacts the internal stepped surface 1212 of the cylinder 121. The threaded shank of the bolt is fixedly installed on the frame component 4 of the vehicle body by a nut.

[0053] refer to Figure 4 , Figure 5 and Figure 6 In some embodiments of this application, the frame assembly 11 includes a first structural member 112. The first structural member 112 may be a long strip-shaped metal structural member, and its material may be made of relatively lightweight metal materials such as aluminum alloy. Two first structural members 112 are spaced apart along the first direction X to form two opposite sides of the frame assembly 11 in the first direction X. To facilitate adaptation to the vehicle body, the dimensions of the first structural members 112 in the first direction X can be specifically set according to actual needs. The distance between the two first structural members 112 can be set according to the total size of the battery cells that the battery pack housing 1 needs to accommodate. The sum of the dimensions of the two first structural members 112 in the first direction X and the distance between the two first structural members 112 can remain unchanged, that is, the dimensions of the battery pack housing 1 in the first direction X remain unchanged. This ensures that the battery pack housing 1 accommodating different numbers of battery cells can be adapted to the same type of vehicle body, thereby improving the versatility of the battery pack housing 1 and the interchangeability between battery pack housings 1 accommodating different numbers of battery cells.

[0054] When the number of cells in the battery pack is small, the spacing between the two first structural members 112 needs to be appropriately reduced. To ensure that the dimensions of the battery pack housing 1 in the first direction X remain unchanged, the dimensions of the first structural member 112 in the first direction X need to be appropriately increased. This results in a simultaneous increase in the space occupied and the weight of the first structural member 112. (Reference) Figure 1 To reduce the space occupied and weight of the first structural component 112, the thickness of a portion, or even the entire portion, of the first structural component 112 can increase gradually along the first direction X. During installation, the side of the first structural component 112 with greater thickness is adjacent to the battery cell, and the side with less thickness is adjacent to the sill beam 3 of the vehicle body. This reduces the space occupied and weight of the first structural component 112 while ensuring sufficient strength. When the battery pack housing 1 is mounted on the vehicle frame component 4 using fasteners 2, the first structural component 112 is less prone to deformation due to factors such as the weight of the battery cell. In this application, the first structural component 112 can be divided into a first part 1121 and a second part 1122. The first part 1121 and the second part 1122 are arranged side by side in the first direction X. Specifically, along the first direction X, the first parts 1121 of the two first structural components 112 are adjacent, that is, the first parts 1121 of the two first structural components 112 are spaced apart and opposite each other. After the battery pack housing 1 houses the battery cells and is installed on the vehicle body, the first part 1121 is adjacent to the battery cells, and the second part 1122 is adjacent to the door sill beam 3 of the vehicle body. The thickness of the first part 1121 is not less than the thickness of the second part 1122, so that the thickness of at least a portion of the first structural member 112 increases progressively.

[0055] The thickness between the first part 1121 and the second part 1122 can be arranged in various ways. (See reference) Figure 1 For example, the thickness of the first part 1121 can increase along the first direction X. The side with the greater thickness of the first part 1121 is adjacent to the battery cell, and the side with the lesser thickness is connected to the second part 1122. This ensures the strength of the first structural component 112 itself. The thickness of the second part 1122 can be consistent with the thickness of the side with the lesser thickness of the first part 1121, so as to minimize the weight and space occupied by the first structural component 112 while ensuring that the dimensions of the battery pack housing 1 remain unchanged in the first direction X. For another example, the thickness of the first part 1121 can increase along the first direction X. The side with the greater thickness of the first part 1121 is adjacent to the battery cell, and the side with the lesser thickness is connected to the second part 1122. The thickness of the second part 1122 also increases, with the side with the greater thickness connected to the first part 1121, and the side with the lesser thickness adjacent to the sill beam 3.

[0056] refer to Figure 4 and Figure 5 In some embodiments of this application, the battery pack housing 1 includes a cover plate 13 disposed between two first structural members 112. One side of the cover plate 13 along the thickness direction may be coplanar with one side of the two first structural members 112 along the thickness direction. When the battery pack housing 1 is installed onto the vehicle frame component 4 of the vehicle body, the coplanar side of the cover plate 13 with the first structural members 112 can serve as the floor of the vehicle body, providing a flat mounting base for other structures within the vehicle cabin. In other words, the first structural members 112 and the cover plate 13 in the battery pack housing 1 are integrated into the vehicle body as the vehicle floor. This significantly improves the space utilization rate inside the new energy vehicle, saving interior space; it also helps to reduce the overall vehicle weight, contributing to improved vehicle range and energy efficiency.

[0057] In some embodiments of this application, the junction between the cover plate 13 and the first structural member 112 is filled with sealant to prevent gaps from appearing at the junction. This ensures the sealing of the battery pack housing 1. Furthermore, when the first structural member 112 and the cover plate 13 serve as the vehicle floor, sealing is typically required between the vehicle sill beam 3, the frame component 4, and the first structural member 112 and the cover plate 13. If gaps exist at the junction between the cover plate 13 and the first structural member 112, it will severely affect the sealing effect between the vehicle sill beam 3, the frame component 4, and the first structural member 112 and the cover plate 13, potentially leading to leakage problems in the vehicle cabin at that location.

[0058] refer to Figure 5 and Figure 6 In some embodiments of this application, the battery pack housing 1 further includes a base plate 14. The frame assembly 11 includes a second structural member 113, which is connected between two first structural members 112. Two second structural members 113 are provided, and the two second structural members 113 are spaced apart along the second direction Y. The first direction X intersects the second direction Y, and the included angle between them can be acute, obtuse, or right. In this application, the first direction X and the second direction Y are preferably orthogonal, so that the first structural members 112 and the second structural members 113 together form a rectangular frame assembly 11.

[0059] The base plate 14 and the cover plate 13 are respectively disposed on both sides of the first structural member 112 and the second structural member 113 along the thickness direction. The base plate 14, the cover plate 13, the first structural member 112, and the second structural member 113 together form a receiving cavity 15 for accommodating the battery cell.

[0060] refer to Figure 5In some embodiments of this application, the frame assembly 11 includes a third structural member 114. The third structural member 114 is located within the receiving cavity 15 formed by the first structural member 112, the second structural member 113, the cover plate 13, and the bottom plate 14. The third structural member 114 can be connected between two first structural members 112 or between two second structural members 113. The third structural member 114 is also provided with a connecting structure 111 to increase the number of connection points between the frame assembly 11 and the vehicle frame component 4. This can improve the connection strength between the frame assembly 11 and the vehicle frame component 4. The connecting structure 111 provided on the third structural member 114 can be a threaded hole 111b. Corresponding to the position of the threaded hole 111b, the cover plate 13 is provided with a clearance hole 131 opposite to the threaded hole 111b. During installation, screws or other fasteners 2 can be screwed into the threaded hole 111b from the vehicle cabin side. Fastener 2 is inserted into threaded hole 111b via clearance hole 131 to achieve a fixed connection between third structural member 114 and frame component 4. Since third structural member 114 is located within the receiving cavity 15 of battery pack housing 1, the connection between third structural member 114 and frame component 4 will not cause sealing failure in the vehicle cabin. Therefore, the above arrangement increases the connection point between frame assembly 11 and frame component 4 while avoiding the introduction of additional sealing structures, thereby simplifying the structure.

[0061] Secondly, this utility model embodiment provides a battery pack, which includes a battery pack housing 1 as described above and battery cells. The battery cells are disposed within the battery pack housing 1.

[0062] Specifically, the battery pack includes a battery pack housing 1 and battery cells. The number of battery cells depends on actual needs. For battery packs suitable for high-mileage vehicles, the number of battery cells can be relatively large; for battery packs suitable for low-mileage vehicles, the number of battery cells can be relatively small. Battery packs of the same model but with different numbers of battery cells can maintain the same external dimensions. To ensure that the housing cavity 15 inside the battery pack accommodates the battery cells and is compatible with the size of the required number of battery cells, the width of the first structural member 112 in the battery pack housing 1 can be adaptively increased.

[0063] refer to Figure 4 , Figure 5In the battery pack housing 1, a plurality of connecting structures 111 are provided on the frame assembly composed of the first structural member 112 and the second structural member 113. The connecting structures 111 are used for fixed connection with the vehicle frame component 4 of the vehicle body. This eliminates the need for the frame assembly 11 to be installed on the sill beam 3. Therefore, during the design process, the battery pack housing 1 can be specifically configured according to the number of battery cells required to be accommodated inside. It does not need to increase its own volume to adapt to the vehicle's sill beam 3. This is beneficial in reducing the volume of the battery pack housing 1, reducing the material required for processing the battery pack housing 1, and simultaneously reducing the weight of the battery pack housing 1. On the other hand, this also allows the internal space of the battery pack housing 1 to be adapted to the required number of battery cells, eliminating the need for additional filler, thus further reducing the weight of the battery pack. Therefore, the battery pack with the above-mentioned battery pack housing 1 has a relatively small weight and space occupation, which is beneficial in reducing the load on the vehicle equipped with the battery pack and increasing the range of the vehicle equipped with the battery pack.

[0064] This utility model embodiment also provides a vehicle, which includes a frame component 4 and a battery pack housing 1 as described above. The frame component 4 of this application includes at least one of a crossbeam 41 and a longitudinal beam. The vehicle also includes two sill beams 3. The frame component 4 is disposed between the two sill beams. The battery pack housing 1 is fixedly connected to the frame component 4.

[0065] In some embodiments of this application, the frame component 4 is specifically a crossbeam 41. The aforementioned battery pack housing 1 is fixedly connected to the crossbeam 41.

[0066] In some embodiments of this application, the vehicle includes a sealing gasket 5. The sealing gasket 5 is sealed between the frame component 4 and the battery pack housing 1 to prevent leakage between the battery pack housing 1 and the frame component 4.

[0067] refer to Figure 4 , Figure 5 Specifically, the battery pack housing 1 includes a first structural member 112, a second structural member 113, a cover plate 13, and a bottom plate 14. Two first structural members 112 are spaced apart along a first direction X. Two second structural members 113 are connected between the two first structural members 112, and two second structural members 113 are spaced apart along a second direction Y. The first direction X intersects the second direction Y, so that the first structural members 112 and the second structural members 113 together constitute a frame assembly 11. The bottom plate 14 and the cover plate 13 are respectively disposed on both sides of the first structural member 112 and the second structural member 113 along their thickness direction. The bottom plate 14, the cover plate 13, the first structural member 112, and the second structural member 113 together form a receiving cavity 15 for accommodating the battery cells.

[0068] refer to Figure 4 , Figure 5A cover plate 13 is disposed between two first structural members 112. One side of the cover plate 13 along the thickness direction can be coplanar with one side of the two first structural members 112 along the thickness direction. When the battery pack housing 1 is installed onto the crossbeam 41 of the vehicle body, the coplanar side of the cover plate 13 with the first structural member 112 can serve as the floor of the vehicle body, providing a flat mounting base for other structures within the vehicle cabin. A body sealing plate 31 is provided on the sill beam 3 of the vehicle body. After the battery pack housing 1 of the battery pack is installed onto the crossbeam 41 by fasteners 2, a sealing gasket 5 is sandwiched between the body sealing plate 31 and the battery pack housing 1 to achieve a seal. The sealing gasket 5 can be annular to avoid the connection position between the battery pack housing 1 and the crossbeam 41. The joint between the first structural member 112 and the cover plate 13 is filled with sealant to prevent gaps from appearing at the joint between the cover plate 13 and the first structural member 112, which would affect the sealing effect between the sill beam 3 and the crossbeam 41 of the vehicle body and the first structural member 112 and the cover plate 13.

[0069] The connection structure 111 on the battery pack housing 1 can specifically be a connection hole 111a. The connection hole 111a is formed on the frame assembly 11 of the battery pack housing 1 and extends through the frame assembly 11 along its thickness direction, allowing the frame assembly 11 to be fixedly mounted to the vehicle body's crossbeam 41 using fasteners 2 such as bolts, screws, and rivets. When the battery pack forms the floor of the vehicle, the connection hole 111a on the frame assembly 11 can easily lead to water ingress and leakage problems inside the vehicle's cabin. Therefore, the battery pack housing 1 also includes a sealing assembly 12. The sealing assembly 12 is installed to seal the opening of the connection hole 111a and covers the fastener 2 inside.

[0070] refer to Figure 2 , Figure 3The sealing assembly 12 specifically includes a cylinder 121, a sealing ring 122, and a threaded component 123. The first end of the cylinder 121 is sealed to the opening of the connecting hole 111a. During installation, the fastener 2 can pass through the cavity of the cylinder 121 into the connecting hole 111a. The second end of the cylinder 121 has an internal thread for connection with the threaded component 123. The sealing ring 122 can be fitted onto the unthreaded portion of the threaded component 123, so that after the threaded component 123 is screwed into the second end of the cylinder 121, a seal is achieved between the second end of the cylinder 121 and the threaded component 123. The cylinder 121 is sealed and welded to the frame assembly 11 to prevent leakage between the cylinder 121 and the frame assembly 11. To save space, a cavity for accommodating the cylinder 121 can be formed in the frame assembly 11, and the cylinder 121 is inserted into this cavity and fixed by sealing welding. The outer diameter of the first end of the cylinder 121 can be smaller than that of the other parts of the cylinder 121, so as to form an outer stepped surface 1211 at the first end of the cylinder 121. During installation, the first end of the cylinder 121 can be sealed and inserted into the connecting hole 111a, and the outer stepped surface 1211 is sealed and connected around the opening of the connecting hole 111a. The diameter of the cylinder cavity at the first end of the cylinder 121 is smaller than that of the other parts of the cylinder 121, so that the cylinder cavity at the first end of the cylinder 121 forms an inner stepped surface 1212. During installation, the fastener 2 is inserted into the connecting hole 111a through the cylinder cavity of the cylinder 121. When the fastener 2 is a bolt, the threaded shank of the bolt can be inserted into the connecting hole 111a through the cylinder cavity, and the bolt head contacts the inner stepped surface 1212 of the cylinder 121. The threaded shank of the bolt is fixedly installed on the crossbeam 41 of the vehicle body by a nut.

[0071] The frame assembly 11 includes a third structural member 114. The third structural member 114 is located within the receiving cavity 15 formed by the first structural member 112, the second structural member 113, the cover plate 13, and the base plate 14. The third structural member 114 can be connected between two first structural members 112, and it is also provided with a connecting structure 111 to increase the connection points between the frame assembly 11 and the crossbeam 41 of the vehicle body. The connecting structure 111 on the third structural member 114 can be a threaded hole 111b. Corresponding to the position of the threaded hole 111b, the cover plate 13 is provided with a clearance hole 131 opposite to the threaded hole 111b. During installation, screws or other fasteners 2 can be screwed into the threaded hole 111b from the vehicle cabin side. The fasteners 2 are inserted into the threaded hole 111b through the clearance hole 131 to achieve a fixed connection between the third structural member 114 and the crossbeam 41. Since the third structural member 114 is located inside the receiving cavity 15 of the battery pack housing 1, the connection between the third structural member 114 and the crossbeam 41 will not cause the sealing failure in the vehicle cabin.

[0072] Since the frame assembly 11 no longer needs to be installed on the door sill beam 3, the battery pack housing 1 can be specifically designed according to the number of cells it needs to accommodate, without increasing its own size to fit the vehicle's door sill beam 3. For low-range vehicles, this avoids having a large amount of unused space inside the battery pack housing 1, thus eliminating the need for additional filler. This helps reduce the vehicle's load and simultaneously increases its range.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0074] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. For the embodiments of the battery pack and vehicle, since they are basically similar to the embodiment of battery pack housing 1, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0075] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A battery pack case characterized by comprising: include: The frame assembly (11) is provided with multiple connection structures (111), all of which are used to be fixedly connected to the frame component (4); The battery pack housing includes a sealing assembly (12). The connection structure (111) includes a connection hole (111a); the sealing assembly (12) is sealed and installed at the opening of the connection hole (111a); The sealing assembly (12) includes a cylinder (121), a sealing ring (122), and a threaded component (123). The cylinder (121) is sealed and installed on the frame assembly (11). The first end of the cylinder (121) is sealed and connected to the opening of the connecting hole (111a). The second end of the cylinder (121) is threaded and connected to the threaded part (123). The sealing ring (122) is sealed and disposed between the threaded part (123) and the second end of the cylinder (121).

2. The battery pack enclosure of claim 1, wherein, The cylinder (121) is sealed and welded to the frame assembly (11).

3. The battery pack enclosure of any of claims 1-2, wherein, The frame assembly (11) includes a first structural member (112); Along the first direction (X), there are two of the first structural members (112) spaced apart; The first structural member (112) includes a first part (1121) and a second part (1122); along the first direction (X), the first parts (1121) of the two first structural members (112) are adjacent; the thickness of the first part (1121) is not less than the thickness of the second part (1122).

4. The battery pack housing according to claim 3, characterized in that, The battery pack housing includes a cover plate (13); The cover plate (13) is disposed between the two first structural members (112), and one side of the cover plate (13) along the thickness direction is coplanar with one side of the first structural member (112) along the thickness direction.

5. The battery pack housing according to claim 4, characterized in that, The junction between the cover plate (13) and the first structural member (112) is filled with sealant.

6. The battery pack enclosure of claim 4, wherein, The battery pack housing includes a base plate (14). The frame assembly (11) includes a second structural member (113) connected between two first structural members (112); two second structural members (113) are spaced apart along the second direction (Y); the first direction (X) intersects the second direction (Y); The bottom plate (14) and the cover plate (13) are respectively disposed on both sides of the first structural member (112) and the second structural member (113) along the thickness direction; the bottom plate (14), the cover plate (13), the first structural member (112), and the second structural member (113) form a receiving cavity (15).

7. The battery pack enclosure of claim 6, wherein, The frame assembly (11) includes a third structural member (114). The third structural member (114) is located within the receiving cavity (15), and the third structural member (114) is connected between two first structural members (112) or between two second structural members (113); The connection structure (111) includes a threaded hole (111b), which is disposed on the third structural member (114). The cover plate (13) is provided with a clearance hole (131) opposite to the threaded hole (111b). The threaded hole (111b) and the clearance hole (131) are used to be fixedly connected to the frame component (4) by fasteners (2).

8. A battery pack, characterized in that, It includes a battery cell and a battery pack housing (1) as described in any one of claims 1-7, wherein the battery cell is disposed within the battery pack housing (1).

9. A vehicle characterized by comprising: It includes a frame component (4) and a battery pack housing (1) as described in any one of claims 1-7, wherein the battery pack housing (1) is fixedly connected to the frame component (4).

10. The vehicle of claim 9, wherein, The frame component (4) is a crossbeam (41), and the battery pack housing (1) is fixedly connected to the crossbeam (41).

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