Battery pack box body with sealed side surfaces and battery pack

Abstract

The utility model discloses a side sealed battery pack box body and battery pack, the battery pack box body comprises a battery box body and a battery box cover, the battery box cover is covered on the battery box body, the side wall of the battery box body is provided with a plurality of first mounting holes, and the first mounting holes are communicated with the battery box body. A plurality of second mounting holes corresponding to the first mounting holes are formed in the side surface of the battery box cover; and the battery box body and the battery box cover are hermetically connected through fasteners penetrating through the first mounting holes and the second mounting holes. According to the battery pack box body with the side surface provided with the holes, the space can be more effectively utilized, the battery pack is allowed to be provided with more battery cells in a limited space, and meanwhile, the compactness of the structure is kept; the assembling process can be simplified, the connecting holes are located in the side face, and therefore the fasteners can be installed more easily, and assembling efficiency and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack manufacturing technology, specifically to a side-sealed battery pack housing and battery pack. Background Technology

[0002] With the shift from lead-acid batteries to lithium batteries, more and more automakers are beginning to use cylindrical lithium batteries in small-capacity vehicles such as two-wheeled and three-wheeled vehicles. This shift not only improves battery energy density and cycle life but also reduces the overall weight of the vehicle. However, as battery pack design continues to evolve, the space left for the battery pack within the vehicle is gradually decreasing, posing new challenges to battery pack size control and design.

[0003] For ease of assembly, the sealing structure of traditional cylindrical battery packs for small-capacity vehicles is usually located on the upper surface. The upper and lower housings of the battery pack typically feature a curved, flanged design, with a sealing gasket added between the flanges to ensure a tight seal. The bolt holes of the sealing gasket are pressed into the rivet nuts on the flanges of the lower housing, and the flanges of the upper and lower housings are fully compressed and coupled to the sealing gasket by tightening the bolts.

[0004] While this design ensures the battery pack's sealing to some extent, the flanged design on its upper surface occupies the longitudinal installation space of the battery. In cases where the enclosure space is relatively compact, this design may cause difficulties in installing the battery pack, and the space between the battery and the enclosure is restricted, increasing the complexity and difficulty of assembly. Utility Model Content

[0005] This invention proposes a side-sealed battery pack housing and battery pack, which improves assembly efficiency by optimizing the longitudinal space utilization of the battery pack.

[0006] To achieve the above objectives, this utility model provides a side-sealed battery pack housing, comprising: a battery housing and a battery cover, wherein the battery cover is disposed on the battery housing, the side wall of the battery housing has a plurality of first mounting holes, and the side of the battery cover has a plurality of second mounting holes corresponding to the first mounting holes, and the battery housing and the battery cover are sealed together by fasteners passing through the first mounting holes and the second mounting holes.

[0007] Preferably, the top of the side wall of the battery box is provided with a mounting flange, a plurality of first mounting holes are provided on the mounting flange, the outer contour of the mounting flange is located within the outer contour of the side wall, and the battery box cover is provided on the mounting flange.

[0008] Preferably, a plurality of the first mounting holes are evenly spaced on the mounting flange.

[0009] Preferably, it further includes a sealing ring, which is sleeved on the mounting flange, and the sealing ring is provided with a third mounting hole that matches the first mounting hole.

[0010] Preferably, the side wall of the battery box is provided with a plurality of first grooves, and the first mounting hole is opened in the first groove. The side of the battery box cover is provided with a plurality of second grooves that match the first grooves, and the second mounting hole is opened in the second groove.

[0011] Preferably, the fasteners are bolts and press-fit nuts.

[0012] Preferably, the depth of the first groove and the second groove is greater than the length of the bolt head.

[0013] Preferably, the battery box body is a cuboid with an opening at the top, and the battery box cover is a cuboid with an opening at the bottom.

[0014] This utility model also provides a battery pack, including the above-mentioned side-sealed battery pack housing, and the battery pack further includes multiple battery cells arranged in a matrix.

[0015] Preferably, the battery cell is a cylindrical battery cell, and the first mounting hole is formed in the gap between two adjacent cylindrical battery cells.

[0016] The advantages of this utility model include at least the following:

[0017] 1. The battery pack housing design with side openings can make more efficient use of space. This design allows the battery pack to install more cells in a limited space while maintaining a compact structure.

[0018] 2. The battery pack housing design with side openings simplifies the assembly process. Since the connection holes are located on the side, fasteners can be installed more easily, thereby improving assembly efficiency and accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the side-sealed battery pack housing according to an embodiment of the present invention;

[0020] Figure 2 This is a top cross-sectional view of the side-sealed battery pack housing according to an embodiment of the present invention;

[0021] Figure 3 This is a partial cross-sectional view of the side-sealed battery pack housing according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the side-sealed battery pack housing according to an embodiment of the present invention.

[0023] In the diagram: 1-Battery housing; 11-First mounting hole; 12-First groove; 2-Battery housing cover; 21-Second mounting hole; 22-Second groove; 3-Mounting flange; 4-Sealing ring; 41-Third mounting hole; 5-Bolt; 6-Pressure nut; 7-Battery cell. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 As shown, this utility model provides a side-sealed battery pack housing, including: a battery housing 1 and a battery cover 2. The battery cover 2 is disposed on the battery housing 1. The side wall of the battery housing 1 has a plurality of first mounting holes 11. The side of the battery cover 2 has a plurality of second mounting holes 21 corresponding to the first mounting holes 11. The battery housing 1 and the battery cover 2 are sealed together by fasteners passing through the first mounting holes 11 and the second mounting holes 21.

[0026] This embodiment of the invention utilizes space more effectively by opening holes on the side of the battery pack housing. This design allows for the installation of more battery cells within a limited space while maintaining structural compactness. The side-opening battery pack housing design simplifies the assembly process; since the connection holes are located on the side, fasteners can be installed more easily, thereby improving assembly efficiency and accuracy.

[0027] Specifically, a mounting flange 3 is provided on the top of the side wall of the battery box 1, and multiple first mounting holes 11 are provided on the mounting flange 3. The outer contour of the mounting flange 3 is located within the outer contour of the side wall, and the battery box cover 2 is placed on the mounting flange 3.

[0028] Since the mounting flange 3 does not extend beyond the outer contour of the sidewall, the battery pack is more compact and does not increase the overall size of the battery pack. This allows the battery pack to accommodate more cells or other components in a limited space, improving space utilization.

[0029] Specifically, multiple first mounting holes 11 are evenly spaced on the mounting flange 3.

[0030] The evenly spaced first mounting holes 11 help to form a more uniform sealing contact between the battery housing 1 and the battery cover 2, enhancing sealing performance. At the same time, the evenly spaced hole design simplifies the assembly process, making it easier for operators to align and install fasteners, thus improving assembly efficiency.

[0031] Specifically, the battery pack housing also includes a sealing ring 4, which is fitted onto the mounting flange 3, and the sealing ring 4 is provided with a third mounting hole 41 that matches the first mounting hole 11.

[0032] The sealing ring 4 can improve the protection level of the battery pack, effectively prevent moisture and dust from entering the battery pack, and ensure the safe operation of the battery in various environments.

[0033] Specifically, the side wall of the battery box 1 is provided with a plurality of first grooves 12, and the first mounting hole 11 is opened in the first groove 12. The side of the battery box cover 2 is provided with a plurality of second grooves 22 that match the first grooves 12, and the second mounting hole 21 is opened in the second groove 22.

[0034] The groove design can better accommodate the sealing ring 4, improve the sealing effect between the battery box 1 and the battery box cover 2, and the groove design can improve the space utilization inside the battery pack.

[0035] Specifically, the fasteners are bolt 5 and press-fit nut 6.

[0036] Bolt 5 and press-fit nut 6 provide a high-strength connection, ensuring the stability and reliability of the battery box 1 and battery box cover 2 under various operating conditions. At the same time, the bolted connection method is suitable for automated assembly lines, which can improve production efficiency and reduce labor costs.

[0037] Specifically, the depth of the first groove 12 and the second groove 22 is greater than the length of the head of the bolt 5.

[0038] like Figure 2 As shown, in order to maximize the saving of battery pack space while satisfying the sealing of the box, the depth of the first groove 12 and the second groove 22 is greater than the length of the head of the bolt 5, so that the battery pack of this utility model embodiment has no protruding structure in the entire outer casing after assembly.

[0039] Specifically, the battery box 1 is a cuboid with an opening at the top, and the battery box cover 2 is a cuboid with an opening at the bottom.

[0040] The cuboid shape maximizes the use of internal space, and because of its simple geometry, it is easy to machine or cast, which helps to improve production efficiency and reduce costs.

[0041] This utility model embodiment also provides a battery pack, including the above-mentioned side-sealed battery pack housing, and also includes a plurality of battery cells 7, which are arranged in a matrix.

[0042] Matrix arrangement can make more efficient use of the internal space of the battery pack, increase the number of cells, and thus improve the energy density of the battery pack. The regular arrangement of cells is conducive to automated assembly and improves the production efficiency of the battery pack.

[0043] Specifically, cell 7 is a cylindrical cell, and the first mounting hole 11 is opened in the gap between two adjacent cylindrical cells.

[0044] like Figure 3 As shown, this design ensures that the bolt's thread is located in the gap formed by the sides of the two cylindrical cells, providing sufficient space between the cells and the casing, thus maximizing the use of the large spacing between cylindrical cells.

[0045] In this embodiment of the invention, the battery pack is packaged by first inserting the cylindrical battery pack into the casing through the gap in the bolts. After all components, including the battery pack, are inserted, a sealing ring is affixed to the side of the casing. Finally, the casing lid is closed and secured with bolts, resulting in the final product as shown. Figure 4 The battery pack housing shown is sealed on the side.

[0046] In summary, the side-sealed battery pack housing provided by this utility model effectively prevents moisture and dust from entering the battery pack by setting a sealing ring 4 between the battery housing 1 and the battery cover 2, and having a corresponding third mounting hole 41 on the sealing ring that matches the first mounting hole 11, thus improving the waterproof and dustproof rating of the battery pack. By setting multiple first grooves 12 on the upper edge of the battery housing 1 and multiple second grooves 22 matching the first grooves 12 on the side of the battery cover 2, and opening the mounting holes within the grooves, the structural stability of the connection area is enhanced, reducing deformation caused by external forces. Using bolts 5 and rivet nuts 6 as fasteners allows for quick assembly and disassembly, facilitating battery pack maintenance and repair. The multiple battery cells 7 inside the battery housing 1 are arranged in a matrix, and the first mounting holes 11 are opened in the gaps between adjacent battery cells 7. This design improves space utilization, allowing more battery cells to be accommodated in a limited space. Simultaneously, the regular matrix arrangement and groove design facilitate automated assembly, improving production efficiency and reducing labor costs.

[0047] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; only preferred embodiments of the present invention are presented. The descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. As long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0048] It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A side-sealed battery pack housing, characterized in that, include: A battery box body (1) and a battery box cover (2) are provided, wherein the battery box cover (2) is placed on the battery box body (1). The side wall of the battery box body (1) is provided with a plurality of first mounting holes (11), and the side of the battery box cover (2) is provided with a plurality of second mounting holes (21) corresponding to the first mounting holes (11). The battery box body (1) and the battery box cover (2) are sealed together by fasteners passing through the first mounting holes (11) and the second mounting holes (21). The side wall of the battery box (1) is provided with a plurality of first grooves (12), and the first mounting hole (11) is opened in the first groove (12). The side of the battery box cover (2) is provided with a plurality of second grooves (22) that match the first grooves (12), and the second mounting hole (21) is opened in the second groove (22).

2. The side-sealed battery pack housing according to claim 1, characterized in that: The top of the side wall of the battery box (1) is provided with a mounting flange (3), and a plurality of first mounting holes (11) are provided on the mounting flange (3). The outer contour of the mounting flange (3) is located within the outer contour of the side wall, and the battery box cover (2) is provided on the mounting flange (3).

3. The side-sealed battery pack housing according to claim 2, characterized in that: Multiple first mounting holes (11) are evenly spaced on the mounting flange (3).

4. The side-sealed battery pack housing according to claim 2, characterized in that: It also includes a sealing ring (4), which is sleeved on the mounting flange (3), and the sealing ring (4) is provided with a third mounting hole (41) that matches the first mounting hole (11).

5. A side-sealed battery pack housing according to claim 1, characterized in that: The fasteners are bolts (5) and press-fit nuts (6).

6. A side-sealed battery pack housing according to claim 5, characterized in that: The depth of the first groove (12) and the second groove (22) is greater than the length of the head of the bolt (5).

7. A side-sealed battery pack housing according to claim 1, characterized in that: The battery box (1) is a cuboid with an opening at the top, and the battery box cover (2) is a cuboid with an opening at the bottom.

8. A battery pack, comprising a side-sealed battery pack housing as described in any one of claims 1 to 7, characterized in that, It also includes multiple battery cells (7), which are arranged in a matrix.

9. A battery pack according to claim 8, characterized in that: The battery cell (7) is a cylindrical battery cell, and the first mounting hole (11) is opened in the gap between two adjacent cylindrical battery cells.

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