A battery case of a roll-press structure

Abstract

The utility model discloses a kind of battery box of roll-pressing structure, including roll-pressing battery box, support sleeve is equipped in inside four corners of roll-pressing battery box, support sleeve top end is connected with upper support plate, support sleeve bottom end is connected with lower support plate, upper support plate is connected with roll-pressing battery box with lower support plate, upper support plate includes fixed part and positioning part, positioning part is located at the outside of roll-pressing battery box, the main load-carrying structure of the battery box body is prepared by using roll-pressing forming process in the utility model, compared with traditional aluminum profile box, raw material cost and mould investment are significantly reduced;Meanwhile, roll-pressing piece can be through the length adjustment to realize the quick adaptation of different specifications box, avoid multiple mould development, effectively reduce product development and production cost, and support sleeve is set in the inside four corners of box, and it is firmly connected with roll-pressing battery box body through upper support plate and lower support plate, form stable four-point support force transmission path.

Description

Technical Field

[0001] This utility model relates to the field of battery box technology, and more specifically, to a roll-pressed battery box. Background Technology

[0002] In practical applications, to meet the demands of high-energy-consuming scenarios such as long-term continuous operation of engineering vehicles and long-distance transportation of heavy trucks, power battery systems need to have large capacity and long range. Therefore, existing electric commercial vehicles generally adopt a combination of multiple battery packs to provide sufficient energy reserves.

[0003] Currently, common battery box structures mainly adopt aluminum profile welded frames or sheet metal stamping splicing. While aluminum profile boxes have certain advantages in terms of lightweighting, the high cost of raw materials, complex processing technology, and large investment in molds result in high overall manufacturing costs, hindering large-scale promotion and application. On the other hand, sheet metal stamping boxes generally suffer from problems such as heavy weight, numerous parts, and complex assembly processes. Furthermore, they have poor compatibility between different vehicle models, making it difficult to achieve platform-based design and increasing development cycles and maintenance costs. In addition, the connection between the upper and lower boxes often relies on complex fastening structures, lacking standardized positioning and support interfaces, resulting in low installation accuracy and inconvenient disassembly and assembly. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a roll-pressed battery box to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A roll-formed battery box includes a roll-formed battery box with support sleeves at the four corners inside. The top of the support sleeve is connected to an upper support plate, and the bottom of the support sleeve is connected to a lower support plate. The upper and lower support plates are connected to the roll-formed battery box. The upper support plate includes a fixing part and a positioning part, with the positioning part located on the outside of the roll-formed battery box.

[0007] Furthermore, the roll-formed battery box includes a roll-formed crossbeam, roll-formed longitudinal beams connected to both sides of the roll-formed crossbeam, and a bottom guard plate connected to the bottom of the roll-formed crossbeam and the roll-formed longitudinal beams.

[0008] Furthermore, to enhance the strength of the roll forming longitudinal beam, a column is connected to the inner side of the roll forming longitudinal beam, and a water-cooling plate mounting hole is provided at the bottom of the inner side of the roll forming longitudinal beam.

[0009] Furthermore, one of the roller pressing beams is connected to a first reinforcing beam on its inner side, and the other roller pressing beam is provided with an inspection port.

[0010] Furthermore, a second reinforcing crossbeam is provided below the bottom guard plate. The two sides of the second reinforcing crossbeam are connected to the roller-pressed longitudinal beams. A third reinforcing crossbeam is provided on one side of the second reinforcing crossbeam. The third reinforcing crossbeam is connected to the connecting spacer.

[0011] Furthermore, the bottom of the roll-formed battery box is provided with a base bracket, and a screw is connected through the base bracket to the inside of the support sleeve.

[0012] Furthermore, the top of the roll-formed battery box is equipped with a cover, and one end of the screw passes through the cover and is connected to the nut.

[0013] The beneficial effects of this utility model are as follows:

[0014] (1) By using roll forming process to prepare the main load-bearing structure of the battery box, the cost of raw materials and mold investment are significantly reduced compared with the traditional aluminum profile box. At the same time, the roll forming parts can be quickly adapted to different specifications of boxes by adjusting the length, avoiding the development of multiple sets of molds and effectively reducing product development and production costs. The roll forming structure has a high strength-to-weight ratio while ensuring sufficient structural strength. It reduces the weight of the box while meeting the bending and torsional performance requirements, which helps to improve the effective load and range of the whole vehicle.

[0015] (2) Support sleeves are set at the four corners inside the box and are firmly connected to the roll-fed battery box through the upper support plate and the lower support plate to form a stable four-point support force transmission path; with the pre-tightening connection structure of the bottom bracket and the through screw, the whole box has good overall rigidity and anti-vibration and anti-impact capabilities, effectively protecting the safety of the internal battery cell module. In addition, the upper support plate is equipped with a positioning part located on the outside of the roll-fed battery box, which can realize quick alignment and precise installation between the upper and lower battery boxes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view of a roll-pressed battery box according to an embodiment of the present utility model;

[0018] Figure 2 This is a structural diagram of the internal structure of a roll-pressed battery box according to an embodiment of the present utility model;

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a bottom structural diagram of a roll-pressed battery box according to an embodiment of the present utility model;

[0021] Figure 5 This is a stacking diagram of a roll-pressed battery box according to an embodiment of the present utility model.

[0022] In the picture:

[0023] 1. Rolled battery box; 2. Support sleeve; 3. Upper support plate; 301. Fixing part; 302. Positioning part; 4. Lower support plate; 5. Rolled crossbeam; 6. Rolled longitudinal beam; 7. Bottom guard plate; 8. Column; 9. Water-cooled plate mounting hole; 10. First reinforcing crossbeam; 11. Inspection port; 12. Second reinforcing crossbeam; 13. Third reinforcing crossbeam; 14. Connecting spacer; 15. Bottom bracket; 16. Screw; 17. Top cover. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] According to an embodiment of the present invention, a roll-pressed battery box is provided.

[0026] Example 1

[0027] like Figures 1-5 As shown, the roll-formed battery box according to an embodiment of the present invention includes a roll-formed battery box 1. Support sleeves 2 are provided at the four corners inside the roll-formed battery box 1. The support sleeves 2 are hollow tubular structures. The top end of the support sleeves 2 is connected to an upper support plate 3, and the bottom end of the support sleeves 2 is connected to a lower support plate 4. Both the upper support plate 3 and the lower support plate 4 are rigidly connected to the inner wall structure (such as longitudinal beams or transverse beams) of the roll-formed battery box 1 by welding. The upper support plate 3 includes a fixing part 301 and a positioning part 302. The fixing part 301 is used to connect with the support sleeves 2 and the box structure to ensure structural stability. The positioning part 302 extends outward and is located on the outside of the roll-formed battery box 1. When the upper and lower battery boxes are stacked and assembled, it can be inserted into the corresponding positioning hole or sleeve of the upper box to achieve rapid centering and precise positioning, avoiding installation misalignment and significantly improving modular integration efficiency and assembly accuracy.

[0028] The bottom of the roll-formed battery box 1 is provided with a base bracket 15. A screw 16 is connected through the base bracket 15 and the support sleeve 2. The screw 16 starts from the base bracket 15, passes through the lower support plate 4, the support sleeve 2, and the upper support plate 3 in sequence, and extends to the top of the box. A top cover 17 is provided at the top of the roll-formed battery box 1. The upper end of the screw 16 passes through the top cover 17 and is screwed and locked with a nut, thereby tightly connecting the base bracket 15, the support sleeve 2, the upper and lower support plates, and the top cover 17 into a whole through pre-tightening force, forming a "pull rod" prestressed structure that runs through the entire height of the box. This structure can effectively resist external vibration and impact loads, prevent the box from loosening or deforming during long-term use, and greatly improve the stability and fatigue resistance of the overall structure.

[0029] like Figures 1-4 As shown, the roll-formed battery box 1 includes a roll-formed crossbeam 5 in the front-to-back direction and a roll-formed longitudinal beam 6 in the left-to-right direction. The two ends of the roll-formed crossbeam 5 are fixedly connected to the roll-formed longitudinal beams 6 on both sides by welding to form a stable rectangular frame structure with high bending stiffness and dimensional stability. The bottom ends of the roll-formed crossbeam 5 and the roll-formed longitudinal beams 6 are connected to bottom guard plates 7. The inner side of the roll-formed longitudinal beams 6 is connected to columns 8, which extend vertically to further enhance the lateral bending resistance of the longitudinal beams. The bottom inner side of the roll-formed longitudinal beams 6 is provided with water-cooled plate mounting holes 9. These mounting holes 9 are used to firmly fix the water-cooled plate to the inner side of the bottom of the box, ensuring that the water-cooled plate is tightly attached to the bottom of the battery module. One of the roll-formed crossbeams 5 is connected to a first reinforcing crossbeam 10 to enhance the lateral stiffness of the frame on that side and suppress torsional deformation caused by external loads. Another roller-pressed crossbeam 5 is provided with an inspection port 11. This opening allows operators to inspect, maintain, or replace the internal high-voltage connectors, wiring harnesses, cooling pipes, or BMS (Battery Management System) modules without disassembling the entire housing, greatly improving the convenience of later operation and maintenance. A second reinforcing crossbeam 12 is provided below the bottom guard plate 7, forming an effective support for the bottom guard plate 7 and preventing it from vibrating and deforming due to road bumps during vehicle operation. The two sides of the second reinforcing crossbeam 12 are connected to the roller-pressed longitudinal beam 6. A third reinforcing crossbeam 13 is provided on one side of the second reinforcing crossbeam 12. The third reinforcing crossbeam 13 is connected to the connecting spacer 14, which can play the role of supporting and fixing the battery cells.

[0030] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0031] In summary, with the help of the above-mentioned technical solution of this utility model, in actual use, the core components such as battery modules, electrical components (such as high-voltage boxes and BMS acquisition modules), and liquid cooling systems are first installed inside the roll-formed battery box 1. The water-cooled plate is firmly fixed to the bottom of the box through the water-cooled plate mounting holes 9 provided at the bottom inner side of the roll-formed longitudinal beam 6, and is tightly fitted to the bottom surface of the battery module, forming an efficient heat conduction path. This ensures that the heat generated by the battery during charging and discharging can be dissipated in a timely manner, maintaining system temperature uniformity and safety. When multiple battery boxes need to be stacked to meet high power requirements, the positioning part 302 of the upper support plate 3 of the lower battery box protrudes outward from the outside of the box. When assembling the upper box, it can be accurately inserted into the inner side of the corresponding positioning part 302 at the bottom of the upper box, achieving rapid alignment and precise positioning, avoiding connection difficulties or stress concentration due to misalignment. Meanwhile, the upper and lower boxes can be connected by sharing the same set of through screws 16 to achieve layer-by-layer pressing, forming a stable and reliable multi-layer stacked structure. This not only ensures the continuous transmission of force but also simplifies the assembly process and improves on-site installation efficiency. Furthermore, by sealing the battery box with the top cover 17 and then locking the screws 16 with nuts, multiple battery boxes can be combined.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A roll-pressed battery case, characterized in that, The device includes a roll-formed battery box (1), with support sleeves (2) located at the four corners inside the roll-formed battery box (1). The top end of the support sleeve (2) is connected to the upper support plate (3), and the bottom end of the support sleeve (2) is connected to the lower support plate (4). The upper support plate (3) and the lower support plate (4) are connected to the roll-formed battery box (1). The upper support plate (3) includes a fixing part (301) and a positioning part (302). The positioning part (302) is located on the outside of the roll-formed battery box (1).

2. The roll-pressed battery case according to claim 1, characterized in that, The roll-pressed battery box (1) includes a roll-pressed crossbeam (5), roll-pressed longitudinal beams (6) are connected to both sides of the roll-pressed crossbeam (5), and a bottom guard plate (7) is connected to the bottom of the roll-pressed crossbeam (5) and the roll-pressed longitudinal beams (6).

3. The battery case with a roll-pressed structure according to claim 2, characterized in that, The inner side of the roller-pressed longitudinal beam (6) is connected to a column (8), and the bottom of the inner side of the roller-pressed longitudinal beam (6) is provided with a water-cooled plate mounting hole (9).

4. The roll-pressed battery case according to claim 2, characterized in that, One of the roller pressing beams (5) is connected to a first reinforcing beam (10) on its inner side, and the other roller pressing beam (5) is provided with an inspection port (11).

5. A roll-pressed battery case according to claim 2, characterized in that, A second reinforcing beam (12) is provided below the bottom guard plate (7). The second reinforcing beam (12) is connected to the roller pressing longitudinal beam (6) on both sides. A third reinforcing beam (13) is provided on one side of the second reinforcing beam (12). The third reinforcing beam (13) is connected to the connecting sleeve (14).

6. The battery case with a roll-pressed structure according to claim 1, characterized in that, The bottom of the roll-pressed battery box (1) is provided with a bottom bracket (15), and a screw (16) is connected through the bottom bracket (15) and the support sleeve (2).

7. A roll-pressed battery case according to claim 1, characterized in that, The top of the roll-pressed battery box (1) is provided with a cover (17), and one end of the screw (16) passes through the cover (17) and is connected to the nut.

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