PACK box body, battery pack and new energy automobile

Abstract

The utility model provides a PACK box body, a battery pack and a new energy automobile, and relates to the technical field of power batteries, the PACK box body comprises a box body main body, a plurality of lifting lugs are arranged around the box body main body, and the cross section of each lifting lug along the installation direction is Z-shaped. The lifting lug has the beneficial effects that the section of the lifting lug is designed to be Z-shaped, the requirement of the lifting lug on the height is reduced, meanwhile, at least two faces of the lifting lug can be connected with the box body, the box body and the lifting lug have good bearing performance and deformation resistance, the height requirement can be met, and the strength requirement can also be met; the overall structure of the lifting lug comprises the first component, the second component and the metal lining between the first component and the second component, the structure is simple, the types and the number of parts are effectively reduced, the manufacturability is high, the self weight is reduced, and the energy density of the PACK box body can be improved; the lifting lugs are connected with the outer wall of the box body and the inner box girder, and the problem that the number of connecting points of a conventional lifting lug, the box body and the longitudinal girder is small is solved.

Description

Technical Field

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

[0002] Battery packs play a crucial role in electric vehicles and other applications, primarily consisting of three parts: the enclosure, modules, and cells. The design and optimization of each part directly impacts the overall performance, safety, and economy of the battery pack. The enclosure is the outer layer of the battery pack, protecting the individual battery cells and providing structural support. Typically, enclosures are made of high-strength metal materials, which possess excellent strength and durability, effectively resisting external impacts and harsh operating conditions. Therefore, the enclosure is a vital component of the pack. Currently, with the trend towards lightweight vehicles, the space available for the pack is limited. Designing a high-strength, spacious, lightweight, and easily manufactured pack enclosure within this limited space remains a key technological challenge and difficulty in current pack design.

[0003] Currently, to ensure reliable connections between modules and the housing and lifting lugs, thereby achieving load-bearing and transmission of mechanical forces and significantly improving the strength of the battery pack housing, the common design method relies primarily on sheet metal longitudinal beams, housing sidewalls, and lifting lug flange walls for connection. This approach is feasible only if the mounting height of the lifting lugs is sufficiently high, the module's center of gravity is relatively low, and the overall stress on the housing is low. However, some housing designs are constrained by vehicle layout and space limitations, requiring the mounting points of the battery pack lifting lugs to be positioned relatively low. Furthermore, due to power requirements, the battery pack employs a double-layer module design, resulting in a high center of gravity and a long lever arm at the module-to-housing connection, leading to greater overall stress on the housing. In such cases, the commonly used method of connecting only the housing sidewalls and lifting lugs cannot meet the overall strength requirements. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a PACK enclosure, including an enclosure body, with multiple lifting lugs around the enclosure body, and each lifting lug having a Z-shaped cross-section along the installation direction.

[0005] Preferably, each of the said lugs includes:

[0006] The first component includes a first connecting surface for connecting to the bottom of the main body of the housing, the first connecting surface being bent upward and connected to a second connecting surface parallel to the first connecting surface to form the Z-shape;

[0007] The second component is welded to the second connecting surface of the first component and has a third connecting surface that connects to the side of the main body of the housing.

[0008] Preferably, at least one metal bushing is provided between the first component and the second component.

[0009] Preferably, the lifting lug includes a front lifting lug disposed on the front side of the main body of the box, wherein the first connecting surface of the first component of the front lifting lug and the connection point between the first component and the second connecting surface surround the front rounded corner of the main body of the box.

[0010] Preferably, the front two ends of the main body of the box are recessed inward to form a first platform, and the connection between the first connecting surface and the second connecting surface of the first component of the front lifting lug and the third connecting surface of the second component are connected to the front crossbeam and the longitudinal beam inside the main body of the box through the first platform.

[0011] Preferably, the lifting lug includes a rear lifting lug disposed on the rear side of the main body of the box, and the rear end of the main body of the box is recessed inward to form a second recessed platform. The connection between the first connecting surface of the first component of the rear lifting lug and the second connecting surface, and the third connecting surface of the second component, are connected to the rear crossbeam and longitudinal beam inside the main body of the box through the second recessed platform.

[0012] Preferably, the lifting lugs include side lifting lugs disposed on the left and right sides of the main body of the box, and the side of the main body of the box is recessed inward to form a third recessed platform. The connection between the first connecting surface and the second connecting surface of the first component of the side lifting lugs and the third connecting surface of the second component are connected to the longitudinal beam inside the main body of the box through the third recessed platform.

[0013] Preferably, the first component and the second component are sheet metal parts.

[0014] This utility model also provides a battery pack, including the aforementioned PACK housing.

[0015] This utility model also provides a new energy vehicle, including the aforementioned battery pack.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] 1) The lifting lugs are designed with a Z-shaped cross section, which reduces the height requirement of the installation and fixing points. At the same time, it ensures that at least two sides of the lifting lugs can be connected to the main body of the box, so that the main body of the box and the lifting lugs have good load-bearing capacity and deformation resistance, thus meeting both height and strength requirements.

[0018] 2) The overall structure of the lifting lug includes a first component, a second component, and a metal bushing between the two. The structure is simple, effectively reducing the types and number of parts, making it highly manufacturable and reducing its own weight, which is conducive to improving the energy density of the PACK enclosure.

[0019] 3) In addition to connecting to the outer wall of the box body, the lifting lugs also connect to the internal beams of the box body, which solves the problem of few connection points between conventional lifting lugs and the box body and longitudinal beams. Attached Figure Description

[0020] Figure 1 A top view of a PACK enclosure, as described in a preferred embodiment of the present invention.

[0021] Figure 2 A bottom view of a PACK enclosure, which is a preferred embodiment of the present invention;

[0022] Figure 3 An exploded view of a PACK enclosure, which is a preferred embodiment of the present invention.

[0023] Figures 4(a)-4(b) This is a schematic diagram of the structure of the front lifting lug before and after assembly, in a preferred embodiment of the present invention.

[0024] Figures 5(a)-5(b) This is a schematic diagram of the structure of the rear lug before and after assembly, in a preferred embodiment of the present invention.

[0025] Figures 6(a)-6(b) This is a schematic diagram of the side lugs before and after assembly, representing a preferred embodiment of the present invention. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment; other embodiments that conform to the spirit of the present invention may also fall within its scope.

[0027] In a preferred embodiment of this utility model, based on the above-mentioned problems existing in the prior art, a PACK enclosure is now provided, such as... Figure 1 As shown in Figure 6, the enclosure includes a main body 100, and multiple lifting lugs are provided around the main body 100. The cross-section of each lifting lug along the installation direction is Z-shaped.

[0028] Specifically, such as Figures 1 to 3 As shown, in this embodiment, each lifting lug preferably includes two front lifting lugs 200 located at both ends of the front side of the main body 100, two rear lifting lugs 300 located at the rear end of the main body 100, and four side lifting lugs 400 located on both sides of the main body 100.

[0029] In a preferred embodiment of this utility model, each lifting lug includes:

[0030] The first component 1 includes a first connecting surface 11 for connecting to the bottom of the housing body 100, the first connecting surface 11 is bent upward and connected to a second connecting surface 12 parallel to the first connecting surface 11, so as to form a Z-shape;

[0031] The second component 2 is welded to the second connecting surface 12 of the first component 1 and has a third connecting surface 21 that is connected to the side of the main body 100 of the box.

[0032] Specifically, in this embodiment, each lifting lug adopts a Z-shaped design, which reduces the height requirement for its installation and fixing points, such as... Figure 2 As shown, it can be seen that the first connecting surface 11 of the first component 1 of each lifting lug is connected to the bottom of the main body 100 of the box, and the connection between the first connecting surface 11 and the second connecting surface 12 is attached to the side wall of the main body 100 of the box, so that the lifting lug has at least two surfaces that can be connected to the main body 100 of the box, so that the main body 100 of the box and the lifting lug have good load-bearing performance and deformation resistance, thus meeting both height and strength requirements.

[0033] Furthermore, by welding the second component 2 onto the second connecting surface 12 of the first component 1, the overall strength of the lifting lug can be improved, and the second component 2 is connected to the main body 100 of the box via the third connecting surface 21, further improving the load-bearing performance of the lifting lug.

[0034] In a preferred embodiment of the present invention, at least one metal bushing 3 is provided between the first component 1 and the second component 2.

[0035] Specifically, in this embodiment, by providing a metal bushing 3, deformation at the connection between the first component 1 and the second component 2 is effectively prevented, thereby improving the strength of the lifting lug. Preferably, the second connecting surface 12 of the first component 1 is provided with a mounting hole 111, and the metal bushing 3 is welded to this mounting hole 111. Subsequently, the second component 2 is spot-welded to the first component 1 to form the lifting lug. The overall structure of the lifting lug includes the first component 1, the second component 2, and the metal bushing 3 between them. This simple structure effectively reduces the types and number of parts, enhances manufacturability, and lowers the weight, thus improving the energy density of the PACK enclosure.

[0036] In a preferred embodiment of this utility model, such as Figures 4(a) to 4(b) As shown, the lifting lug includes a front lifting lug 200 disposed on the front side of the main body 100. The first connecting surface 11 of the first component 1 of the front lifting lug 200 and the connection between it and the second connecting surface 12 surround the front rounded corner of the main body 100, so that it can be welded to the main body 100 in the X, Y and Z directions, effectively improving the firmness.

[0037] In a preferred embodiment of the present invention, the front two ends of the main body 100 of the box are recessed inward to form a first recessed platform 101. The connection between the first connecting surface 11 and the second connecting surface 12 of the first component 1 of the front lifting lug 200 and the third connecting surface 21 of the second component 2 are connected to the front crossbeam 102 and the longitudinal beam 103 inside the main body 100 of the box through the first recessed platform 101.

[0038] Specifically, the main body 100 of the enclosure is a sheet metal shell, preferably formed by stamping process to form the first recessed platform 101. After the components of the front lifting lug 200 are assembled, the front lifting lug 200 can be placed in the corresponding position of the first recessed platform 101, and its connection with the shell 108 of the main body 100 of the enclosure, as well as the front crossbeam 102 and longitudinal beam 103 inside the main body 100 of the enclosure, is achieved by spot welding.

[0039] In a preferred embodiment of this utility model, such as Figures 5(a) to 5(b) As shown, the lifting lug includes a rear lifting lug 300 disposed on the rear side of the main body 100 of the box. The rear end of the main body 100 is recessed inward to form a second recessed platform 104. The connection between the first connecting surface 11 and the second connecting surface 12 of the first component 1 of the rear lifting lug 300 and the third connecting surface 21 of the second component 2 are connected to the rear crossbeam 105 and the longitudinal beam 103 inside the main body 100 of the box through the second recessed platform 104.

[0040] Specifically, the main body 100 of the box is a sheet metal shell, preferably formed by stamping process to form the second recessed platform 104. After the assembly of each component of the rear lifting lug 300, the rear lifting lug 300 can be placed in the corresponding position of the second recessed platform 104, and the connection between it and the shell 108 of the main body 100 of the box, as well as the rear crossbeam 105 and longitudinal beam 103 inside the main body 100 of the box, is achieved by spot welding.

[0041] In a preferred embodiment of this utility model, such as Figures 6(a) to 6(b) As shown, the lifting lugs include side lifting lugs 106 disposed on the left and right sides of the main body 100 of the box. The side of the main body 100 of the box is recessed inward to form a third recessed platform 107. The connection between the first connecting surface 11 and the second connecting surface 12 of the first component 1 of the side lifting lug 106 and the third connecting surface 21 of the second component 2 are connected to the longitudinal beam 103 inside the main body 100 of the box through the third recessed platform 107.

[0042] Specifically, the main body 100 of the box is a sheet metal shell, preferably formed by stamping process to form the third recessed platform 107. After the assembly of the various components of the side lifting lug 106, the side lifting lug 106 can be placed in the corresponding position of the third recessed platform 107, and the connection between it and the shell 108 of the main body 100 of the box, as well as the longitudinal beam 103 inside the main body 100 of the box, is achieved by spot welding.

[0043] In a preferred embodiment of this utility model, the first component 1 and the second component 2 are sheet metal parts.

[0044] This utility model also provides a battery pack, including the aforementioned PACK housing.

[0045] This utility model also provides a new energy vehicle, including the aforementioned battery pack.

[0046] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made using the content of this specification and illustrations should be included within the protection scope of the present utility model.

Claims

1. A PACK enclosure, characterized in that, It includes a main body of the box, and the main body of the box is provided with multiple lifting lugs around it. The cross-section of each lifting lug along the installation direction is Z-shaped. Each of the aforementioned lugs includes: The first component includes a first connecting surface for connecting to the bottom of the main body of the housing, the first connecting surface being bent upward and connected to a second connecting surface parallel to the first connecting surface to form the Z-shape; The second component is welded to the second connecting surface of the first component and has a third connecting surface that connects to the side of the main body of the housing.

2. The PACK enclosure according to claim 1, characterized in that, At least one metal bushing is provided between the first component and the second component.

3. The PACK enclosure according to claim 1, characterized in that, The lifting lug includes a front lifting lug disposed on the front side of the main body of the box, and the first connecting surface of the first component of the front lifting lug and the connection point between the first component and the second connecting surface surround the front rounded corner of the main body of the box.

4. The PACK enclosure according to claim 3, characterized in that, The front two ends of the main body of the box are recessed inward to form a first platform. The connection between the first connecting surface and the second connecting surface of the first component of the front lifting lug and the third connecting surface of the second component are connected to the front crossbeam and the longitudinal beam inside the main body of the box through the first platform.

5. The PACK enclosure according to claim 1, characterized in that, The lifting lug includes a rear lifting lug disposed on the rear side of the main body of the box. The rear end of the main body of the box is recessed inward to form a second recessed platform. The connection between the first connecting surface of the first component of the rear lifting lug and the second connecting surface, as well as the third connecting surface of the second component, are connected to the rear crossbeam and longitudinal beam inside the main body of the box through the second recessed platform.

6. The PACK enclosure according to claim 1, characterized in that, The lifting lugs include side lifting lugs disposed on the left and right sides of the main body of the box. The side of the main body of the box is recessed inward to form a third recessed platform. The connection between the first connecting surface and the second connecting surface of the first component of the side lifting lug and the third connecting surface of the second component are connected to the longitudinal beam inside the main body of the box through the third recessed platform.

7. The PACK enclosure according to claim 1, characterized in that, The first component and the second component are sheet metal parts.

8. A battery pack, characterized in that, Includes the PACK enclosure as described in any one of claims 1-7.

9. A new energy vehicle, characterized in that, Includes the battery pack as described in claim 8.

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