Composite lithium battery box of mobile charging vehicle

Abstract

The composite lithium battery box comprises a box body, the box body comprises a lower box body which is located at the bottom and provided with an upward opening, and fixing holes are formed in the two side edges of the lower box body respectively; the at least one middle box body is stacked at the top of the lower box body, an integrated cavity is formed in the middle box body, and a battery module is placed in the cavity; and the upper cover covers the top of the middle box body. In conclusion, the composite lithium battery box disclosed by the utility model has remarkable advantages in the aspects of light weight, space optimization, flexible capacity configuration, structural stability, safety and the like, and effectively solves the problems in the prior art.

Description

Technical Field

[0001] This utility model relates to a lithium battery box, and more particularly to a composite lithium battery box for a mobile charging vehicle. Background Technology

[0002] Existing mobile charging stations generally rely on battery racks for battery box installation. While this method meets basic installation and fixation requirements, its inherent limitations and shortcomings are gradually becoming apparent, specifically the following drawbacks:

[0003] 1) Increased overall vehicle weight: Battery racks are typically made of high-strength metals or alloys, ensuring structural strength but also adding significant weight. This increases the overall weight of the mobile charging station, with the battery rack accounting for approximately 20% of the total weight. This not only increases energy consumption but also affects the driving performance of the mobile charging vehicle, contradicting the current trend towards lightweight design.

[0004] 2) Low space utilization and difficulty in flexible adjustment: With technological advancements, the requirements for the number and layout of battery boxes are increasing. However, traditional battery rack designs are inadequate in terms of space utilization and lack flexibility. When the number of battery boxes needs to be increased, it is often necessary to redesign or even manufacture entirely new battery racks, which not only increases costs but also prolongs the equipment upgrade cycle and fails to respond quickly to changes in market demand.

[0005] 3) Potential safety and stability risks: The design of the battery rack must balance static load-bearing capacity with stability and safety under dynamic operating conditions. Inappropriate load-bearing design or material selection may lead to deformation or even breakage of the battery rack, seriously threatening the safety of the battery box and mobile charging vehicle. Furthermore, the battery rack has weak resistance to horizontal impacts; once subjected to external forces, its overall stability will be challenged, increasing the risk of accidents.

[0006] In summary, the existing battery rack mounting method used in mobile charging vehicle battery boxes has significant drawbacks in terms of weight control, space utilization, and safety and stability. Therefore, there is a need for a lightweight, space-optimized, and safe and stable lithium battery box for mobile charging vehicles. Utility Model Content

[0007] To address the shortcomings of the aforementioned technologies, this invention provides a composite lithium battery box for a mobile charging vehicle.

[0008] To solve the above technical problems, the technical solution adopted by this utility model is: a composite lithium battery box for a mobile charging vehicle, comprising a box body, the box body including:

[0009] The lower box is located at the bottom and opens upwards, with fixing holes on both sides of the lower box;

[0010] An intermediate box is stacked on top of the lower box, and there is at least one intermediate box, which forms an integrated cavity in which the battery module is placed.

[0011] The top cover that covers the top of the middle box.

[0012] Preferably, the top edge of the middle box is folded outward to form an upper flange, and the bottom edge is folded outward to form a lower flange.

[0013] Preferably, when there is one intermediate box, the top and bottom of the intermediate box are connected to the upper cover and the lower box, respectively.

[0014] Preferably, when there are multiple intermediate boxes, the lower flange of each intermediate box is fastened to the upper flange of its adjacent intermediate box by bolts, and the multiple intermediate boxes are stacked in sequence.

[0015] Preferably, the bottom of the top cover has a fixed edge that cooperates with the upward-curved edge.

[0016] Preferably, the fixed edge of the top cover is fastened to the upper flange of the middle box body by bolts.

[0017] Preferably, the top of the lower housing has a folded edge that matches the lower flange, and the folded edge is fastened to the lower flange by bolts.

[0018] Preferably, the fixing holes of the lower housing are fastened to the chassis of the mobile charging vehicle by bolts.

[0019] Preferably, silicone sealing gaskets are provided between the folded edge of the lower box and the lower folded edge of the middle box, and between the upper folded edge of the middle box and the fixed edge of the upper cover.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1) Lightweight and Space Optimization: The composite lithium battery box adopts a structure of a lower box, a middle box, and a top cover, eliminating the need for battery rack installation. This design not only achieves lightweighting but also optimizes space utilization and saves costs. Furthermore, the structure facilitates disassembly and assembly, improving maintenance convenience.

[0022] 2) Flexible capacity configuration and sustained power support: The number of intermediate cabinets can be flexibly configured according to system capacity requirements, resulting in a significant increase in battery pack capacity. This provides users with more sustained and reliable power support, meeting charging needs in different scenarios.

[0023] 3) Enhanced Structural Stability and Safety: The middle chamber in the composite lithium battery box structure adopts an integrated upper and lower cavity design, significantly enhancing structural stability. Furthermore, high-strength bolts are used to connect the lower chamber, the middle chamber, and the top cover, as well as between the lower chamber and the mobile charging vehicle chassis. This connection method not only improves the battery box's resistance to horizontal impacts but also maintains overall stability, ensuring the safety of both the battery box and the mobile charging vehicle.

[0024] In summary, the composite lithium battery box of this invention exhibits significant advantages in terms of lightweight design, space optimization, flexible capacity configuration, structural stability, and safety, effectively solving the problems existing in the prior art. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the intermediate box structure.

[0027] In the diagram: 1. Lower housing; 11. Folded edge; 12. Fixing hole; 13. Rivet nut; 2. Middle housing; 21. Upper folded edge; 22. Lower folded edge; 23. Cavity; 3. Upper cover; 31. Fixing edge. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Example 1

[0030] like Figure 1 The illustrated composite lithium battery box for a mobile charging vehicle includes a box body, the box body comprising:

[0031] The lower box 1 is located at the bottom and has an opening facing upwards. Fixing holes 12 are provided on both sides of the lower box 1.

[0032] The lower housing serves as the same foundation for the entire system, used to install the battery modules and support the middle housing. Its base plate is securely connected to the mobile charging vehicle chassis using M8×25 bolts, ensuring the stability of the entire battery system.

[0033] An intermediate box 2 is stacked on top of the lower box, and there is at least one intermediate box 2, which forms an integrated cavity 23, and a battery module is placed in the cavity 23.

[0034] The middle box, as the core component, adopts an integrated cavity design, which simplifies the structure and improves strength.

[0035] The top cover 3 covers the top of the middle box.

[0036] The top cover serves as the top seal and is connected to the uppermost middle box with M5×16 bolts to ensure the sealing and integrity of the entire battery box.

[0037] like Figure 2 As shown, the top edge of the middle box 2 is folded outward to form an upper flange 21, and the bottom edge is folded outward to form a lower flange 22. Multiple rivet nuts 13 are spaced apart on the upper flange.

[0038] When there is only one intermediate box 2, the top and bottom of the intermediate box 2 are connected to the upper cover and the lower box, respectively.

[0039] The bottom of the top cover 3 has a fixed edge 31 that mates with the upper flange. Several through holes are spaced apart on the fixed edge. The fixed edge 31 of the top cover 3 is fastened to the upper flange 21 of the intermediate box by bolts. The fixed edge is connected to the upper flange nut of the uppermost intermediate box by M5×16 bolts.

[0040] The top of the lower housing 1 has a folded edge 11 that matches the lower flange 22, and the folded edge 11 is fastened to the lower flange 22 by bolts. Multiple rivet nuts 13 are arranged at intervals on the folded edge 11. The lower flange 22 is connected to the rivet nuts on the lower housing by M5×16 bolts.

[0041] The mounting holes of the lower housing 1 are fastened to the chassis of the mobile charging vehicle by bolts. The lower housing is also tightly connected to the welded nuts on the chassis of the mobile charging vehicle by M8×25 bolts.

[0042] To ensure airtightness, silicone sealing gaskets are provided between the folded edge 11 of the lower box 1 and the lower folded edge of the middle box, as well as between the upper folded edge of the middle box and the fixed edge of the upper cover.

[0043] Example 2

[0044] The difference between this embodiment and Embodiment 1 is that:

[0045] When there are multiple intermediate boxes 2, the lower flange of each intermediate box is fastened to the upper flange of its adjacent intermediate box by bolts, and the multiple intermediate boxes are stacked in sequence.

[0046] This application allows for flexible expansion of battery capacity by increasing the number of intermediate housings. The lower flange of each intermediate housing is connected to the upper flange of the previous intermediate housing by M5×16 bolts, enabling sequential stacking.

[0047] This invention proposes an innovative composite lithium battery box structure, abandoning the traditional battery rack mounting method and instead adopting a more compact and efficient composite structure. It has the following advantages:

[0048] 1. Lightweight, Space Optimization, and Cost Savings: Compared to traditional battery rack installation structures, this new composite lithium battery box requires no additional support structure, significantly reducing the weight of the entire battery system and effectively saving space. The compact stacking method allows for more efficient use of previously occupied space, increasing the energy density of the battery system. Eliminating the battery rack reduces material usage and lowers the overall price of the battery system.

[0049] 2. Efficiently Increased Battery Pack Capacity: By increasing the number of intermediate cells, this invention achieves a significant increase in battery pack capacity. Each battery cell is equipped with a 1P48S, 300Ah lithium-ion cell, with a capacity of 46.08kWh. When the main cell is combined with five intermediate cells, the system's maximum capacity reaches 276.48kWh, providing users with longer-lasting and more reliable power support.

[0050] 3. Safe and stable, meeting the performance requirements of mobile charging vehicles: The composite lithium battery box structure of this utility model includes three parts: a lower box, a middle box, and a top cover. The middle box adopts an integrated upper and lower cavity design, which significantly enhances the stability of the structure.

[0051] The enclosure is made of high-quality AlSi10MnMg aluminum profiles, and the shelves are welded to the enclosure by friction stir welding to ensure the strength and airtightness of the enclosure.

[0052] High-strength bolts are used to securely connect the mobile charging vehicle chassis to the lower, middle, and upper covers of the composite lithium battery box, ensuring the stability and safety of the battery box in both vertical and horizontal directions.

[0053] In summary, the composite lithium battery box for mobile charging vehicles of this invention performs excellently in terms of lightweight design, space optimization, cost saving, high-efficiency capacity expansion, and safety and stability. It meets the performance requirements of mobile charging vehicles during low-speed operation and provides users with a more reliable and efficient power solution.

[0054] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. A composite lithium battery box for a mobile charging vehicle, comprising a box body, characterized in that: The enclosure includes: The lower box (1) is located at the bottom and has an opening facing upwards. Fixing holes (12) are provided on both sides of the lower box (1). An intermediate box (2) is stacked on top of the lower box, and there is at least one intermediate box (2), which has an integrated cavity (23) inside, and a battery module is placed inside the cavity (23). The top cover (3) covers the top of the middle box.

2. The composite lithium battery box of the mobile charging vehicle according to claim 1, characterized in that: The top edge of the intermediate box (2) is folded outward to form an upper flange (21), and the bottom edge is folded outward to form a lower flange (22).

3. The composite lithium battery box of the mobile charging vehicle according to claim 2, characterized in that: When there is one intermediate box (2), the top and bottom of the intermediate box (2) are connected to the upper cover and the lower box, respectively.

4. The composite lithium battery box of the mobile charging vehicle according to claim 2, characterized in that: When there are multiple intermediate boxes (2), the lower flange of each intermediate box is fastened to the upper flange of its adjacent intermediate box by bolts, and the multiple intermediate boxes are stacked in sequence.

5. The composite lithium battery box of the mobile charging vehicle according to claim 3 or 4, characterized in that: The bottom of the upper cover (3) has a fixed edge (31) that cooperates with the upper flange.

6. The composite lithium battery box of the mobile charging vehicle according to claim 5, characterized in that: The fixed edge (31) of the upper cover (3) is fastened to the upper flange (21) of the middle box body by bolts.

7. The composite lithium battery box of the mobile charging vehicle according to claim 3 or 4, characterized in that: The top of the lower housing (1) is formed with a folded edge (11) that matches the lower flange. The folded edge (11) is fastened to the lower flange (22) by bolts.

8. The composite lithium battery box of the mobile charging vehicle according to claim 7, characterized in that: The fixing holes of the lower housing (1) are fastened to the chassis of the mobile charging vehicle by bolts.

9. The composite lithium battery box of the mobile charging vehicle according to claim 7, characterized in that: Silicone sealing gaskets are provided between the folded edge (11) of the lower box (1) and the lower folded edge of the middle box, as well as between the upper folded edge of the middle box and the fixed edge of the upper cover.

Images