Battery cell pole post support and battery module

Abstract

This utility model relates to the field of battery technology, and more particularly to a battery cell terminal support and a battery module. The battery cell terminal support includes a connecting piece, a buffer cantilever, and a connecting sleeve. The connecting piece is used for welding to the terminal of the battery cell. A buffer cantilever is provided on the side of the connecting piece, and the connecting sleeve is disposed on the buffer cantilever. By providing a buffer cantilever on the side of the connecting piece and a connecting sleeve on the buffer cantilever, the battery cell terminal support connects to the busbar, effectively ensuring the strength and stability of the connection between the battery cell terminal support and the busbar. Furthermore, by providing a buffer cantilever, the expansion force of the battery cell can be buffered, preventing the expansion force from concentrating at the weld and ensuring the quality of the weld.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell terminal support and battery module. Background Technology

[0002] In existing technology, the terminals of the battery cell and the busbar need to be connected by a bracket. When the battery cell expands during charging and discharging, the resulting expansion force will subject the bracket to lateral tension. Due to the high overall structural strength of the bracket, the weak point of the bracket appears at the weld between the thin sheet structure and the terminal. The expansion force can easily cause the weld to crack, greatly reducing the welding quality.

[0003] Therefore, there is an urgent need for a cell terminal support and battery module to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a cell terminal support bracket and a battery module to ensure the strength and stability of the connection between the cell terminal support bracket and the busbar, and to ensure the quality of the welding.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A battery cell terminal support, comprising:

[0007] A connecting piece, which is used for welding to the terminal of the battery cell;

[0008] A buffer cantilever is provided on the side of the connecting piece;

[0009] A connecting sleeve is disposed on the buffer cantilever.

[0010] As an optional solution, the buffer cantilever includes a connecting arm and a cantilever that are bent and connected in sequence. The connecting arm is connected to the side of the connecting piece, and the cantilever and the connecting piece are arranged at intervals relative to each other. The cantilever is provided with the connecting sleeve.

[0011] As an optional solution, the cantilever has a through mounting hole, and the connecting sleeve is press-fitted and fixed in the mounting hole.

[0012] As an optional feature, the thickness of the connecting piece is 1.5mm to 4mm;

[0013] And / or, the thickness of the buffer cantilever is 1.5mm to 4mm.

[0014] As an optional solution, the connecting piece is provided with a welding groove, and the bottom wall of the welding groove is used for welding connection with the electrode post of the battery cell.

[0015] As an optional feature, an observation hole is provided on the bottom wall of the welding groove, which is aligned with the center hole of the battery cell.

[0016] As an optional solution, the buffer cantilever is provided with a clearance part, which is used to avoid the operation position of welding the connecting piece to the electrode post of the battery cell.

[0017] As an optional solution, the materials of the connecting piece and the buffer cantilever are the same as the materials of the battery cell's terminals.

[0018] As an optional solution, the connecting piece is provided with buffer cantilever on both opposite sides, and each buffer cantilever is provided with connecting sleeve.

[0019] A battery module includes a battery cell, a busbar, and a battery cell terminal support as described above. The battery cell is provided with a terminal, the connecting piece is welded to the terminal, and the connecting sleeve is connected to the busbar.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a battery cell terminal support bracket. By setting a buffer cantilever on the side of the connecting piece and placing the connecting sleeve on the buffer cantilever, the connecting sleeve is connected to the busbar, which effectively ensures the strength and stability of the connection between the battery cell terminal support bracket and the busbar. Furthermore, by setting the buffer cantilever, the buffer cantilever can undergo a certain buffer deformation relative to the connecting piece, thereby buffering the expansion force of the battery cell and avoiding the expansion force generated by the battery cell from concentrating at the weld between the connecting piece and the terminal, thus ensuring the quality of the welding.

[0022] This utility model also provides a battery module that, by applying the above-mentioned cell terminal bracket, can ensure the strength and stability of the connection between the cell terminal bracket and the busbar, ensure the quality of welding, and thus improve the electrical performance, safety and reliability of the battery module. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the battery module provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the battery cell electrode support provided in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the battery cell electrode support after removing the connecting sleeve, provided in an embodiment of this utility model.

[0026] In the picture:

[0027] 10. Cell terminal support; 20. Cell; 201. Terminal; 30. Busbar; 40. Fastener;

[0028] 1. Connecting piece; 11. Welding groove; 12. Observation hole; 2. Buffer cantilever; 21. Connecting arm; 22. Cantilever; 221. Mounting hole; 23. Clearance part; 3. Connecting sleeve. Detailed Implementation

[0029] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] In the existing technology, the terminals of the battery cell and the busbar need to be connected by a bracket. When the battery cell expands during charging and discharging, the expansion force will cause the bracket to be subjected to lateral tension. Since the overall structural strength of the bracket is high, the weak point of the bracket is at the weld between the thin sheet structure and the terminal. The expansion force can easily cause the weld to crack, which greatly reduces the welding quality.

[0034] To solve the above problems, such as Figure 1 and Figure 2 As shown, this embodiment provides a battery cell terminal support 10, which includes a connecting piece 1, a buffer cantilever 2, and a connecting sleeve 3. The connecting piece 1 is used for welding to the terminal 201 of the battery cell 20. The buffer cantilever 2 is provided on the side of the connecting piece 1, and the connecting sleeve 3 is disposed on the buffer cantilever 2. The battery cell terminal support 10 provided in this embodiment, by providing the buffer cantilever 2 on the side of the connecting piece 1 and disposing of the connecting sleeve 3 on the buffer cantilever 2, allows the connecting sleeve 3 to connect to the busbar 30, effectively ensuring the strength and stability of the connection between the battery cell terminal support 10 and the busbar 30. Furthermore, by providing the buffer cantilever 2, the buffer cantilever 2 can undergo a certain buffer deformation relative to the connecting piece 1, thereby buffering the expansion force of the battery cell 20 and preventing the expansion force generated by the battery cell 20 from concentrating at the weld between the connecting piece 1 and the terminal 201, thus ensuring the quality of the welding.

[0035] Optionally, in this embodiment, the connecting sleeve 3 is threadedly connected to the busbar 30 via fastener 40, which further ensures the strength and stability of the connection between the cell terminal bracket 10 and the busbar 30.

[0036] It should be noted that in this embodiment, the connecting sleeve 3 has an internal thread, and the fastener 40 passes through the busbar 30 and connects with the internal thread of the connecting sleeve 3. Optionally, the fastener 40 can be a bolt. Optionally, in this embodiment, the connecting sleeve 3 can be made of carbon steel, stainless steel, alloy steel, or copper alloy. This embodiment does not limit the specific material of the connecting sleeve 3, as long as the structural strength and hardness of the connecting sleeve 3 are guaranteed, so as to avoid stripping of the threads during the threaded connection between the connecting sleeve 3 and the fastener 40.

[0037] Furthermore, existing brackets are typically machined from a single piece of aluminum alloy. A thin sheet structure, which is welded to the pole, is milled into the aluminum alloy, leaving a boss on the unmilled portion. This boss is then connected and fixed to the busbar. This setup requires milling a thin sheet structure from a single piece of aluminum alloy, significantly increasing waste generated during bracket manufacturing, reducing material utilization, increasing costs, and failing to guarantee the strength and stability of the connection between the boss and the busbar.

[0038] To address the aforementioned issues, in this embodiment, the side portion of the connecting piece 1 is integrally bent to form a buffer cantilever 2. This configuration allows for direct bending of the sheet material during the fabrication of the battery cell terminal support 10, eliminating the need for milling. This reduces waste generated during the processing of the battery cell terminal support 10, avoids material waste, improves material utilization, and ultimately lowers costs.

[0039] In this embodiment, as Figure 2 and Figure 3 As shown, the buffer cantilever 2 includes a connecting arm 21 and a cantilever 22 connected by bending in sequence. The connecting arm 21 is connected to the side of the connecting piece 1, and the cantilever 22 is arranged at intervals relative to the connecting piece 1. The cantilever 22 is provided with a connecting sleeve 3. The above-mentioned structural design of the buffer cantilever 2 ensures the buffer deformation performance of the buffer cantilever 2, facilitates the bending process of the buffer cantilever 2, and ensures the structural strength of the entire cell terminal support 10. In addition, since the cantilever 22 is arranged at intervals relative to the connecting piece 1, the installation of the connecting sleeve 3 on the cantilever 22 is avoided, making the layout more compact and reasonable. Optionally, in this embodiment, the side of the connecting piece 1 is first bent upward by 90° to form the connecting arm 21, and then the connecting arm 21 is bent horizontally by 90° to form the cantilever 22 above the connecting piece 1.

[0040] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, a through mounting hole 221 is provided on the cantilever 22, and the connecting sleeve 3 is press-fitted and fixed in the mounting hole 221. By press-fitting and fixing the connecting sleeve 3 in the mounting hole 221 on the cantilever 22, the installation operation of the connecting sleeve 3 on the cantilever 22 is more convenient, and the stability of the connecting sleeve 3 installed and fixed on the cantilever 22 is also guaranteed.

[0041] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, the two opposite sides of the connecting piece 1 are integrally bent to form a buffer cantilever 2, and each buffer cantilever 2 is provided with a connecting sleeve 3. The above configuration not only enhances the buffering effect of the entire cell terminal bracket 10 on the expansion force of the cell 20, further ensuring the quality of welding, but also effectively ensures the connection strength and stability between the cell terminal bracket 10 and the busbar 30.

[0042] Optionally, in this embodiment, the materials of the connecting piece 1 and the buffer cantilever 2 are the same as the material of the terminal post 201 of the battery cell 20. Since the connecting piece 1 and the terminal post 201 are made of the same material, it is easier to achieve the welding connection between the connecting piece 1 and the terminal post 201, ensuring the easy welding performance of the connecting piece 1, reducing the requirements for welding process parameters, ensuring welding yield, and improving production stability and product qualification rate. Optionally, in this embodiment, the materials of the connecting piece 1, the buffer cantilever 2, and the terminal post 201 can all be selected from 1060-O temper aluminum alloy to ensure good conductivity, ductility, elongation, and tensile strength. It should be noted that since the buffer cantilever 2 is formed by bending the side of the connecting piece 1, the material of the connecting piece 1 is the same as the material of the buffer cantilever 2.

[0043] Optionally, in this embodiment, the thickness of the connecting piece 1 is 1.5mm to 4mm. Specifically, the thickness of the connecting piece 1 can be 1.5mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, or 4mm. In this embodiment, the thickness of the buffer cantilever 2 is 1.5mm to 4mm. Specifically, the thickness of the buffer cantilever 2 can be 1.5mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, or 4mm. The above configuration not only ensures the structural strength of the battery cell terminal support 10 but also reduces the amount of material used and lowers the cost. It should be noted that since the buffer cantilever 2 is formed by bending the side of the connecting piece 1, the thickness of the connecting piece 1 is the same as the thickness of the buffer cantilever 2.

[0044] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, a welding groove 11 is provided on the connecting piece 1, and the bottom wall of the welding groove 11 is used for welding connection with the electrode post 201 of the battery cell 20. The above arrangement not only ensures the structural strength of the connecting piece 1, but also facilitates the welding through the bottom wall of the welding groove 11, ensuring the reliability of the welding connection between the bottom wall of the welding groove 11 and the electrode post 201.

[0045] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, an observation hole 12 is provided on the bottom wall of the welding groove 11, which is aligned with the center hole of the battery cell 20. By providing the observation hole 12, it is easy to observe the placement position of the battery cell electrode support 10 relative to the battery cell 20, ensuring the accuracy of the placement position of the battery cell electrode support 10 on the electrode 201, and ensuring the welding precision of the connecting piece 1 and the electrode 201.

[0046] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, the buffer cantilever 2 is provided with a clearance portion 23, which is used to avoid the operation position of welding the connecting piece 1 to the electrode post 201 of the battery cell 20. This arrangement avoids interference between the buffer cantilever 2 and the welding operation between the connecting piece 1 and the electrode post 201, facilitating the welding operation. Specifically, in this embodiment, the cantilever 22 is provided with a clearance portion 23, which is in the form of a clearance groove. It should be noted that the clearance groove and the welding groove 11 are directly opposite each other in the vertical direction, and the outline of the clearance groove is the same as the outline of the opposite welding groove 11.

[0047] like Figure 1 As shown, this embodiment also provides a battery module, which includes a battery cell 20, a busbar 30, and the aforementioned battery cell terminal support 10. A terminal 201 is disposed on the battery cell 20, and a connecting piece 1 is welded to the terminal 201. A connecting sleeve 3 is threadedly connected to the busbar 30 via a fastener 40. The battery module provided in this embodiment, by applying the aforementioned battery cell terminal support 10, improves material utilization, reduces costs, and ensures the strength and stability of the connection between the battery cell terminal support 10 and the busbar 30, guaranteeing welding quality, thereby improving the electrical performance, safety, and reliability of the battery module. Optionally, in this embodiment, a battery cell terminal support 10 is welded to each terminal 201 of the battery cell 20.

[0048] It should be noted that the battery module includes multiple cells 20, which are arranged sequentially and connected in series and / or in parallel through cell terminal brackets 10 and busbars 30.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery cell electrode support, characterized in that, include: A connecting piece (1) is used for welding to the terminal (201) of the battery cell (20); Buffer cantilever (2), the buffer cantilever (2) is provided on the side of the connecting piece (1); Connecting sleeve (3), the connecting sleeve (3) is disposed on the buffer cantilever (2).

2. The cell post support of claim 1, wherein, The buffer cantilever (2) includes a connecting arm (21) and a cantilever (22) that are bent and connected in sequence. The connecting arm (21) is connected to the side of the connecting piece (1). The cantilever (22) is arranged at intervals relative to the connecting piece (1). The cantilever (22) is provided with the connecting sleeve (3).

3. The cell post support of claim 2, wherein, The cantilever (22) has a through mounting hole (221), and the connecting sleeve (3) is riveted and fixed in the mounting hole (221).

4. The cell post support of any one of claims 1 to 3, wherein, The thickness of the connecting piece (1) is 1.5mm to 4mm; And / or, the thickness of the buffer cantilever (2) is 1.5mm to 4mm.

5. The cell post support of any one of claims 1-3, wherein, The connecting piece (1) has a welding groove (11) and the bottom wall of the welding groove (11) is used to weld to the electrode (201) of the battery cell (20).

6. The electrode post support of claim 5, wherein, The bottom wall of the welding groove (11) is provided with an observation hole (12), which is used to be directly opposite the center hole of the battery cell (20).

7. The cell post support of any one of claims 1-3, wherein The buffer cantilever (2) is provided with a clearance part (23), which is used to avoid the operation position where the connecting piece (1) is welded to the terminal post (201) of the battery cell (20).

8. The cell electrode support according to any one of claims 1 to 3, characterized in that, The materials of the connecting piece (1) and the buffer cantilever (2) are the same as the materials of the terminal (201) of the battery cell (20).

9. The cell post support of any one of claims 1-3, wherein, The connecting piece (1) is provided with buffer cantilever (2) on two opposite sides, and each buffer cantilever (2) is provided with connecting sleeve (3).

10. A battery module, characterized by It includes a battery cell (20), a busbar (30), and a battery cell terminal support as described in any one of claims 1 to 9. The battery cell (20) is provided with a terminal (201), the connecting piece (1) is welded to the terminal (201), and the connecting sleeve (3) is connected to the busbar (30).

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