Battery module end plate quick connection structure

Abstract

The utility model provides a quick connecting structure for end plates of a battery module. The quick connecting structure comprises a first end plate and a second end plate, the first end plate comprises a first end plate body, and a first clamping groove and a second clamping groove communicated with the first clamping groove are formed in the two ends of the first end plate body respectively. The cross section of the first clamping groove is circular, and the diameter of the first clamping groove is larger than the width of the second clamping groove. The second end plate comprises a second end plate body, bent plate bodies are arranged at the two ends of the second end plate body respectively, arc-shaped expansion plate bodies are arranged at the ends of the bent plate bodies, the bent plate bodies are inserted into the second clamping grooves, the arc-shaped expansion plate bodies are inserted into the first clamping grooves, and the arc-shaped expansion plate bodies are matched with the inner walls of the first clamping grooves in an expansion mode. According to the utility model, the first end plate and the second end plate are connected in an inserting manner, so that the assembling manner is simple, the time required for assembling is short, and the production efficiency of the battery pack is improved; and the first end plate and the second end plate are stably connected and are not easy to separate from each other.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery module end plate quick connection structure. Background Art

[0002] With the development of the domestic new energy vehicle industry, the demand for battery packs has gradually increased, and higher requirements have been placed on the production efficiency and yield rate of manufacturers. Existing battery packs usually include internal battery modules and external end plates, which are connected to each other and wrap the battery modules therein; in existing battery modules, the connection between the end plates is usually made by welding or bolting;

[0003] Among them, the welding method requires a high level of welding skills from the operator. If the welding level is not in place, cracks are likely to occur at the weld, causing the two adjacent end plates to separate. In the bolt connection method, the two adjacent end plates need to be connected by multiple sets of bolts. The bolts are more complicated to install and take a long time to assemble, resulting in low production efficiency of the battery pack. In addition, the bolts are prone to loosening in a vibrating environment, resulting in a loose connection between the two adjacent end plates.

[0004] Therefore, there is an urgent need to provide a battery module end plate connection structure that has reliable connection, is not easy to disengage after installation, and has high installation efficiency. Summary of the invention

[0005] The utility model aims to solve the deficiencies in the prior art and provide a battery module end plate connection structure which has reliable connection, is not easy to be disengaged after installation and has high installation efficiency.

[0006] The purpose of the utility model is achieved through the following technical solutions: a battery module end plate quick connection structure, comprising a first end plate and a second end plate, the first end plate and the second end plate are enclosed to form a accommodating space for accommodating a battery module; the first end plate comprises a first end plate body, and the two ends of the first end plate body are respectively provided with a first card slot and a second card slot connected to the first card slot; the cross-section of the first card slot is circular and the diameter of the first card slot is greater than the width of the second card slot; the second end plate comprises a second end plate body, and the two ends of the second end plate body are respectively provided with a bent plate body, and the end of the bent plate body is provided with an arc-shaped expansion plate body, the bent plate body is inserted into the second card slot, the arc-shaped expansion plate body is inserted into the first card slot, and the arc-shaped expansion plate body is expansion-fitted with the inner wall of the first card slot.

[0007] In the utility model, the first end plate and the second end plate are assembled by plugging. During assembly, it is only necessary to insert the bent plate on the second end plate into the second slot on the first end plate, and insert the arc-shaped expansion plate on the second end plate into the first slot on the first end plate. Since the arc-shaped expansion plate and the inner wall of the first slot are tightly matched, the first end plate and the second end plate are firmly connected, and the first end plate and the second end plate are not easy to separate. The arc-shaped expansion plate and the inner wall of the first slot are tightly expanded, and the surface of the arc-shaped expansion plate is in close contact with the inner wall of the first slot, so that the first end plate and the second end plate are tightly matched, and the connection between the two has good sealing, so that even if the battery module leaks, the liquid cannot leak from the connection between the first end plate and the second end plate. In the utility model, the first end plate and the second end plate are connected by plugging, the assembly method is simple, the assembly time is short, and the production efficiency of the battery pack is improved; and the first end plate and the second end plate are firmly connected, and the two are not easy to separate. The arc-shaped expansion plate body is tightly matched with the inner wall of the first clamping groove, so that the connection between the first end plate and the second end plate has good sealing performance.

[0008] Preferably, the cross section of the arc-shaped expansion plate body is in the shape of an arc, and the central angle of the cross section of the arc-shaped expansion plate body is 240-280 degrees.

[0009] Preferably, before the arc-shaped expansion plate is inserted into the first slot, the outer diameter of the arc-shaped expansion plate is larger than the diameter of the first slot. Since the outer diameter of the arc-shaped expansion plate is larger than the diameter of the first slot before the arc-shaped expansion plate is inserted into the first slot, when the arc-shaped expansion plate is inserted into the first slot, the diameter of the arc-shaped expansion plate will be forced to shrink, and the shrunk arc-shaped expansion plate will be tightly tightened with the inside of the first slot, so that the first end plate and the second end plate are tightly connected.

[0010] Preferably, the difference between the outer diameter of the arc-shaped expansion plate and the diameter of the first clamping groove is 1-2 mm.

[0011] Preferably, the angle between the bent plate body and the second end plate body is 90 degrees.

[0012] Preferably, the first end plate is made of steel plate.

[0013] Preferably, the second end plate is made of metal material.

[0014] The beneficial effects of the utility model are as follows: in the utility model, the first end plate and the second end plate are connected by plugging, the assembly method is simple, the assembly time is short, and the production efficiency of the battery pack is improved; and the first end plate and the second end plate are firmly connected and are not easy to be separated. The arc-shaped expansion plate body and the inner wall of the first card slot are tightly matched, so that the connection between the first end plate and the second end plate has good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded view of the utility model.

[0016] Figure 2 It is a schematic structural diagram of the first side panel.

[0017] Figure 3 It is a schematic structural diagram of the second side panel.

[0018] Figure 4 It is a schematic diagram of the structure of the connection between the first side plate and the second side plate.

[0019] In the figure: 1. battery module, 2. first end plate, 21. first end plate body, 22. first slot, 23. second slot, 3. second end plate, 31. second end plate body, 32. bent plate body, 33. arc-shaped expansion plate body. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0021] like Figures 1 to 4 As shown, a battery module 1 end plate quick connection structure includes a first end plate 2 and a second end plate 3. The first end plate 2 and the second end plate 3 enclose a storage space for accommodating the battery module 1, and the battery module 1 is installed in the storage space. The first end plate 2 includes a first end plate body 21, and the first end plate body 21 is provided with a first card slot 22 and a second card slot 23 connected to the first card slot 22 at both ends. The cross section of the first card slot 22 is circular and the diameter of the first card slot 22 is greater than the width of the second card slot 23. The second end plate 3 includes a second end plate body 31, and the second end plate body 31 is provided with a bending plate body 32 at both ends, and the end of the bending plate body 32 is provided with a circular arc expansion plate body 33, the bending plate body 32 is inserted into the second card slot 23, and the circular arc expansion plate body 33 is inserted into the first card slot 22, and the circular arc expansion plate body 33 is tightly matched with the inner wall of the first card slot 22.

[0022] In the present utility model, the first end plate 2 and the second end plate 3 are assembled by plugging. During assembly, it is only necessary to insert the bent plate 32 on the second end plate 3 into the second slot 23 on the first end plate 2, and insert the arc-shaped expansion plate 33 on the second end plate 3 into the first slot 22 on the first end plate 2. Since the arc-shaped expansion plate 33 and the inner wall of the first slot 22 are tightly matched, the first end plate 2 and the second end plate 3 are firmly connected, and the first end plate 2 and the second end plate 3 are not easily separated. The arc-shaped expansion plate 33 and the inner wall of the first slot 22 are tightly expanded, and the surface of the arc-shaped expansion plate 33 is in close contact with the inner wall of the first slot 22, so that the first end plate 2 and the second end plate 3 are tightly matched, and the connection between the two has good sealing, so that even if the battery module 1 leaks, the liquid cannot leak from the connection between the first end plate 2 and the second end plate 3.

[0023] There are two first end plates 2 and two second end plates 3 respectively, and the first end plates 2 and the second end plates 3 are enclosed together to form a rectangular accommodating space.

[0024] The cross section of the arc-shaped expansion plate 33 is arc-shaped, and the central angle of the cross section of the arc-shaped expansion plate 33 is 240-280 degrees. The bending plate 32, the arc-shaped expansion plate 33 and the first end plate body 21 are an integral structure and constitute a complete first end plate 2.

[0025] In this embodiment, the first end plate 2 is made of a steel plate. The arc-shaped expansion plate 33 has a certain elasticity. When the arc-shaped expansion plate 33 is constrained by an external force and radially contracts, the arc-shaped expansion plate 33 will tend to restore its original shape.

[0026] Before the arc-shaped expansion plate 33 is not inserted into the first slot 22, the outer diameter of the arc-shaped expansion plate 33 is larger than the diameter of the first slot 22. Since the outer diameter of the arc-shaped expansion plate 33 is larger than the diameter of the first slot 22 before the arc-shaped expansion plate 33 is not inserted into the first slot 22, when the arc-shaped expansion plate 33 is inserted into the first slot 22, the diameter of the arc-shaped expansion plate 33 will be forced to shrink, and the shrunk arc-shaped expansion plate 33 will be firmly tightened with the inside of the first slot 22, so that the first end plate 2 and the second end plate 3 are tightly connected.

[0027] Furthermore, the difference between the outer diameter of the arc-shaped expansion plate 33 and the diameter of the first clamping groove 22 is 1-2 mm. The difference between the outer diameter of the arc-shaped expansion plate 33 and the diameter of the first clamping groove 22 is determined to be 1-2 mm. Within this difference range, it can ensure that the expansion effect is generated between the arc-shaped expansion plate 33 and the first clamping groove 22, and it can also ensure that the arc-shaped expansion plate 33 can be inserted into the first clamping groove 22 more easily.

[0028] The angle between the bent plate body 32 and the second end plate body 31 is 90 degrees. When manufacturing the second end plate, the bent plate body 32 can be obtained by bending both ends of the steel plate.

[0029] The second end plate 3 is made of metal material. Metal material has good thermal conductivity. When the internal battery module 1 generates heat during operation, the second end plate 3 can dissipate the heat in time, which is helpful for heat dissipation of the battery pack.

[0030] In the present invention, the first end plate 2 and the second end plate 3 are connected by plugging, which is simple to assemble and takes a short time to assemble, thereby improving the production efficiency of the battery pack; and the first end plate 2 and the second end plate 3 are firmly connected and are not easily separated. The arc-shaped expansion plate 33 is tightly matched with the inner wall of the first card slot 22, so that the connection between the first end plate 2 and the second end plate 3 has good sealing performance.

[0031] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A battery module end plate quick connection structure, characterized in that: It includes a first end plate and a second end plate, and the first end plate and the second end plate are enclosed to form an accommodating space for accommodating a battery module; the first end plate includes a first end plate body, and two ends of the first end plate body are respectively provided with a first card slot and a second card slot connected to the first card slot; the cross-section of the first card slot is circular and the diameter of the first card slot is greater than the width of the second card slot; the second end plate includes a second end plate body, and two ends of the second end plate body are respectively provided with a bent plate body, and the end of the bent plate body is provided with an arc-shaped expansion plate body, the bent plate body is inserted into the second card slot, and the arc-shaped expansion plate body is inserted into the first card slot, and the arc-shaped expansion plate body is tightly matched with the inner wall of the first card slot.

2. A battery module end plate quick connection structure according to claim 1, characterized in that: The cross section of the arc-shaped expansion plate body is in an arc shape, and the center angle of the cross section of the arc-shaped expansion plate body is 240-280 degrees.

3. A battery module end plate quick connection structure according to claim 2, characterized in that: Before the arc-shaped expansion plate is inserted into the first clamping groove, the outer diameter of the arc-shaped expansion plate is greater than the diameter of the first clamping groove.

4. A battery module end plate quick connection structure according to claim 3, characterized in that: The difference between the outer diameter of the arc-shaped expansion plate and the diameter of the first clamping groove is 1-2 mm.

5. A battery module end plate quick connection structure according to any one of claims 1 to 4, characterized in that: The angle between the bent plate body and the second end plate body is 90 degrees.

6. A battery module end plate quick connection structure according to any one of claims 1 to 4, characterized in that: The first end plate is made of a steel plate.

7. A battery module end plate quick connection structure according to any one of claims 1 to 4, characterized in that: The second end plate is made of metal material.

Images