Cover plate connecting structure for battery stacking box

Abstract

A cover plate connecting structure for a battery stacking box comprises a box body and a cover plate body, the box body is used for containing a battery module, a plurality of positioning columns are arranged in a to-be-covered area of the box body, and a plurality of guide holes matched with the positioning columns are formed in the cover plate body; and the cover plate body is fixedly connected with the box body through a screw. According to the utility model, on one hand, the positioning columns are adaptively connected with the guide holes, so that the cover plate main body can be quickly positioned and connected with the box body, and the guide columns can limit the transverse displacement of the cover plate main body; and on the other hand, only one screw is needed for fixation, so that the structure is greatly simplified, disassembly and assembly are facilitated, the exterior of the box body is kept attractive, local stress concentration of the cover plate main body is not easily caused by applied force, and internal wiring of the box body is effectively protected from external damage.

Description

Technical Field

[0001] The utility model relates to the technical field of battery stacking boxes, in particular to a cover plate connecting structure for a battery stacking box. Background Art

[0002] Energy storage system is a technology used to store electrical energy. The main function of energy storage system is to store excess electrical energy and release it when needed, so as to balance the load of the power grid, improve the predictability of renewable energy, provide backup power, etc. At present, the core component of most energy storage systems is the battery pack, which is a collection of multiple battery cells and is a direct component for storing electrical energy. The energy efficiency, life and reliability of the battery pack are crucial to the performance of the entire energy storage system. Therefore, technicians in this field have been continuously optimizing the design and management of energy storage systems and battery packs.

[0003] There are two main mainstream directions of battery stacking structures currently on the market. One is a battery stacking structure with a connector plug-in design inside the box. In this design, the batteries are stacked inside a box, with the male connector installed on one side of the box and the female connector installed on the other side; the design of the connector allows the battery cells to be connected through the electrodes and the corresponding sockets of the connector. For example, the positive pole of each battery cell is inserted into the female connector through a connector, and the negative pole is inserted into the male connector through another connector. In this way, a series or parallel circuit is formed between the batteries to form a battery pack. The connector is usually designed as a plug-in structure, which makes the assembly and disassembly of the battery pack relatively convenient. However, due to certain limitations of the connector plug-in design, it may cause loose connection or poor contact, resulting in overcurrent, affecting the performance and safety of the battery pack.

[0004] The other is an external wiring design, where the batteries are stacked in a box and connected through external wiring; after the connection is completed, plastic parts or other insulating materials are used to cover the wiring part to ensure the safety and stability of the connection. This design is relatively simpler, but the existing plastic parts are fixed by screws, and there are multiple screws, which not only destroys the appearance, but also causes local stress concentration due to the applied force, which can easily cause cracks or deformation on the surface of the plastic parts.

[0005] Therefore, the present application aims at the defects of external wiring and designs a cover plate connection structure for a battery stacking box to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a battery stacking box cover connection structure which has a simple structure, is easy to assemble and disassemble, and has a high structural strength.

[0007] The technical solution of the utility model is: a cover plate connection structure for a battery stacking box, comprising a box body for accommodating battery modules and a cover plate body; the box body is provided with a plurality of positioning columns in the area to be covered, and the cover plate body is provided with a plurality of guide holes adapted to the positioning columns; the cover plate body is fixedly connected to the box body by a screw.

[0008] Furthermore, the cover plate body includes a main panel, and an upper end plate, a lower end plate and at least one side panel formed by bending around the main panel; the multiple guide holes are respectively arranged on the upper end plate and the lower end plate.

[0009] Furthermore, the inner wall of the main panel is provided with a plurality of first reinforcing ribs arranged longitudinally and / or transversely; and the surface of the main panel is provided with a first ventilation structure.

[0010] Furthermore, a second ventilation structure is provided on the upper end plate and / or the lower end plate.

[0011] Furthermore, the positioning column is provided with a screw thread at the end away from the column head, and the positioning column is fixed to the box body through the screw thread. A positioning groove for adapting and connecting with the guide hole is provided between the column body and the column head of the positioning column, and the column head and the column body form a conical structure at the end connected to the positioning groove.

[0012] Furthermore, the guide hole includes a tapered opening and a square opening connected to the tapered opening, the size of the tapered opening gradually decreases toward the square opening to form a trumpet shape; the square opening is used to clamp the positioning column.

[0013] Furthermore, among the multiple guide holes, at least one guide hole is arranged on a guide block with three sides, and the guide block includes a top surface, a side surface and a front end surface. The guide hole is opened on the front end surface and opens from the end away from the side surface toward the middle area of ​​the front end surface.

[0014] Furthermore, the upper end plate and the lower end plate are provided with second reinforcing ribs near the guide holes.

[0015] Furthermore, the cover plate body is provided with a threaded hole for passing the screw, and third reinforcing ribs are provided above and below the threaded hole respectively; the box body is provided with a connecting piece at a position opposite to the threaded hole, and the screw is threadedly connected to the connecting piece by passing through the threaded hole on the cover plate body.

[0016] Furthermore, the screw is a countersunk screw.

[0017] Beneficial effects of the utility model:

[0018] (1) The positioning column and the guide hole are adapted to connect the cover body to the box body, so that the cover body can be quickly positioned and connected, and the guide column can limit the lateral displacement of the cover body;

[0019] (2) Only one screw is needed for fixing, which not only greatly simplifies the structure, facilitates disassembly and assembly, and maintains the appearance of the box, but also does not easily cause local stress concentration on the cover body by the applied force, effectively protecting the internal wiring of the box from external damage;

[0020] (3) By setting the first ventilation structure and the second ventilation structure, the heat dissipation speed is fast, which can effectively improve the heat dissipation efficiency of the solar panel;

[0021] (4) By providing reinforcing ribs on the main panel of the cover body, as well as reinforcing ribs near the guide holes and threaded holes, the strength of the cover body is greatly improved, making it less likely for the cover body to deform during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the area to be covered by the box body of the utility model embodiment;

[0024] Figure 3 This is a schematic diagram of the structure of the positioning column of the embodiment of the utility model;

[0025] Figure 4 It is a schematic diagram of the outer structure of the cover plate body of the embodiment of the utility model;

[0026] Figure 5 It is a schematic diagram of the inner structure of the cover body of the embodiment of the utility model;

[0027] Figure 6 It is an enlarged structural schematic diagram of the guide hole in the embodiment of the utility model.

[0028] Description of the accompanying drawings:

[0029] 1. Cover plate body; 2. Box body; 3. Positioning column; 4. Guide hole; 5. Countersunk screw; 6. First ventilation structure; 7. Second ventilation structure; 8. Guide block; 9. Guide panel;

[0030] 11. Main panel; 12. Upper end panel; 13. Lower end panel; 14. Side panel; 21. Connector; 31. Screw thread; 32. Column head; 33. Column body; 34. Positioning groove; 41. Conical mouth; 42. Square mouth; 111. First reinforcing rib; 112. Threaded hole; 113. Third reinforcing rib; 121. Second reinforcing rib. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] like Figure 1 and Figure 2 As shown: A cover plate connection structure for a battery stacking box, comprising a box body 2 for accommodating a battery module and a cover plate body 1, wherein the box body 2 is provided with positioning posts 3 at the four corners of the area to be covered, and the cover plate body 1 is provided with a guide hole 4 adapted to the positioning post on the side facing the positioning post 3; the lateral displacement of the cover plate body 1 is limited by the positioning post 3 being snapped into the guide hole 4; the cover plate body 1 is also fixedly connected to the box body 2 by a countersunk screw 5.

[0033] In this embodiment, at least one battery module is provided in the box, and multiple battery modules can also be provided in the upper and lower layers. Each battery module is composed of multiple battery cells. After the battery module is fixed in the box, wiring banks are usually provided on both sides of the battery module to connect the battery cells inside the battery module to form a series or parallel circuit; module integral connection banks are provided on both sides of the box 2 to connect the communication and control signals between different battery modules, so that the BMS can uniformly manage and monitor the entire battery pack. Both sides of the box 2 are covered with a cover body 1 to cover the aforementioned external wiring part.

[0034] Positioning posts 3 are provided at the four corners of the plate body of the external connection area of ​​the box body 2. Figure 3 As shown: the positioning column 3 is provided with a screw thread 31 at the end away from the column head, and the positioning column is fixed to the box body 2 through the screw thread 31. The column head 32 of the positioning column 3 is an M4 hexagonal head, which is convenient for fixing the positioning column to the box body. A positioning groove 34 is provided between the column body 33 and the column head 32 of the positioning column, and the column head 32 and the column body 33 form a tapered structure at the end connected to the positioning groove 34, so that the positioning column is more easily aligned with the guide hole of the cover body and the positioning accuracy is improved. Preferably, the screw thread length is greater than 8mm, so as to facilitate fastening with the box body and prevent the positioning column from loosening due to force when it is stuck in the guide hole.

[0035] like Figure 4 and Figure 5As shown: In this embodiment, the cover body 1 includes a main panel 11 and an upper end panel 12, a lower end panel 13 and a side panel 14 formed by bending around the main panel 11; wherein, in this embodiment, two side panels can be set according to the structure of the box, or only one side panel can be designed. For example, the present invention only designs one side panel, and the other end is not bent, because the box is provided with an L-shaped connector at this end that needs to extend to the outside, so as to facilitate the fixing of the box to the wall or other platforms. Specifically, the inner wall of the main panel 11 is provided with a first reinforcing rib 111 arranged vertically and horizontally to improve the strength of the cover body. The surface of the cover body 1 is provided with a first ventilation structure 6, and the first ventilation structure 6 preferably includes a plurality of long strip ventilation holes arranged along the length direction of the main panel, which expands the heat dissipation surface area of ​​the cover and effectively improves the heat dissipation efficiency of the battery panel. Two indentations are punched inward in the middle area of ​​the outer surface of the main panel 11 to form a shallow concave cavity, and the first ventilation structure 6 is arranged on the concave cavity. The upper end plate 12 and the lower end plate 13 are both provided with a second ventilation structure 7, which is preferably designed as a C-shaped structure, that is, a plurality of ventilation holes are arranged to form a C-shaped structure, which, when combined with the first ventilation structure 6, can further enable more heat to be quickly dissipated through air flow.

[0036] In this embodiment, two guide holes 4 are respectively provided on the upper end plate 12 and the lower end plate 13 of the cover body, that is, a total of four guide holes, which are arranged opposite to the four positioning columns 3. One guide hole in each of the upper end plate 12 and the lower end plate 13 is provided on a guide block 8 with three sides, and the guide block 8 includes a top surface, a side surface and a front end surface to strengthen the structure of the guide hole. The guide hole 4 is opened on the front end surface, and is opened from the end away from the side surface (that is, the exposed end) toward the middle area of ​​the front end surface, so that the cover body can insert the guide hole into the positioning groove of the positioning column during the lateral movement. Preferably, as Figure 6 As shown: the guide hole 4 includes a tapered opening 41 and a square opening 42 connected to the tapered opening, which are opened in sequence along the middle area of ​​the exposed end toward the front end surface. The size of the tapered opening 41 gradually decreases toward the square opening 42 to form a trumpet shape to connect with the square opening. The square opening 42 is used to clamp the positioning column 3, and the tapered opening 41 is used to accurately locate and smoothly clamp the positioning column into the square opening 42 during the transverse movement of the cover body 1 toward the positioning column 3. Another guide hole in the upper end plate 12 and the lower end plate 13 is provided on a single guide panel 9, and the structures of the four guide holes are the same.

[0037] In this embodiment, the upper end plate and the lower end plate are provided with second reinforcing ribs 121 at the positions where they are connected to the guide block and the guide panel. The second ventilation structure 7 is provided in the area between the guide block 8 and the guide panel 9.

[0038] In this embodiment, a threaded hole 112 is provided on one side of the cover body 1. The threaded hole 112 is provided in the middle of the outer convex surface of one side of the concave cavity. A third strip-shaped reinforcing rib 113 is provided above and below the threaded hole 112 to strengthen the strength around the threaded hole. The box body 2 is provided with a connecting piece 21 with a C-shaped cross-section at a position opposite to the threaded hole 112. The countersunk screw 5 passes through the threaded hole 112 on the cover body and is threadedly connected to the connecting piece 21 to achieve the fixation of the cover body 1 and the box body 2. It can be said that in this embodiment, only one countersunk screw 5 is required, and not too many screws are required, thereby greatly simplifying the structure, facilitating disassembly and assembly, and the applied force is not likely to cause local stress concentration on the cover body, effectively protecting the internal wiring of the box body from external damage. In this embodiment, by using the countersunk screw 5, compared with other screws, it can be flush with the surface of the cover body main board after being fixed on the cover body main board, keeping the exterior of the box body beautiful.

[0039] The installation method of the cover body of this embodiment is: the four guide holes 4 of the cover body 1 are respectively directed toward the four positioning columns 3 of the box body 2, and then the cover body 1 is moved horizontally and pushed in the direction of the positioning columns 3, so that the square openings 42 of the guide holes 4 are inserted into the positioning grooves 34 of the positioning columns 3, so that the positioning columns 3 limit the lateral displacement of the cover body 1, and then the countersunk screws 5 are screwed in to limit the displacement in all directions, so that the cover body is beautiful and safe, and easy to disassemble and assemble.

[0040] To sum up, on the one hand, the utility model facilitates the quick positioning and connection of the cover body with the box body through the adaptor connection of the positioning column and the guide hole, and the guide column can limit the lateral displacement of the cover body; on the other hand, only one screw is needed for fixing, which not only greatly simplifies the structure, facilitates disassembly and assembly, and maintains the appearance of the box body, but also the applied force is not easy to cause local stress concentration of the cover body, effectively protecting the internal wiring of the box body from external damage.

Claims

1. A cover plate connection structure for a battery stacking box, comprising a box body for accommodating a battery module and a cover plate body; characterized in that: The box body is provided with a plurality of positioning posts in the area to be covered, and the cover body is provided with a plurality of guide holes matched with the positioning posts; the cover body is fixedly connected to the box body by a screw.

2. The battery stack box cover connection structure according to claim 1, characterized in that: The cover plate body comprises a main panel, and an upper end plate, a lower end plate and at least one side panel formed by bending around the main panel; the plurality of guide holes are respectively arranged on the upper end plate and the lower end plate.

3. The cover plate connection structure for a battery stack box according to claim 2, characterized in that: The inner wall of the main panel is provided with a plurality of first reinforcing ribs arranged longitudinally and / or transversely; the surface of the main panel is provided with a first ventilation structure.

4. The battery stack box cover connection structure according to claim 2 or 3, characterized in that: A second ventilation structure is provided on the upper end plate and / or the lower end plate.

5. The battery stacking box cover connection structure according to claim 1, characterized in that: The positioning column is provided with a screw thread at the end away from the column head, and the positioning column is fixed to the box body through the screw thread. A positioning groove for adapting and connecting with the guide hole is provided between the column body and the column head of the positioning column, and the column head and the column body form a conical structure at the end connected to the positioning groove.

6. The battery stack box cover connection structure according to claim 1, characterized in that: The guide hole comprises a tapered opening and a square opening connected to the tapered opening, the size of the tapered opening gradually decreases toward the square opening to form a trumpet shape; the square opening is used to clamp the positioning column.

7. The battery stack box cover connection structure according to claim 6, characterized in that: Among the multiple guide holes, at least one guide hole is arranged on a guide block with three sides, wherein the guide block includes a top surface, a side surface and a front end surface. The guide hole is opened on the front end surface and opens from the end away from the side surface toward the middle area of ​​the front end surface.

8. The battery stack box cover connection structure according to claim 2, characterized in that: The upper end plate and the lower end plate are provided with second reinforcing ribs near the guide holes.

9. The battery stack box cover connection structure according to claim 1, characterized in that: The cover plate body is provided with a threaded hole for passing the screw, and third reinforcing ribs are respectively provided above and below the threaded hole; the box body is provided with a connecting piece at a position opposite to the threaded hole, and the screw is threadedly connected to the connecting piece by passing through the threaded hole on the cover plate body.

10. The battery stack box cover connection structure according to claim 1, characterized in that: The screw is a countersunk screw.

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