Battery cell peripheral welding tooling

Abstract

This utility model discloses a welding fixture for the periphery of a battery cell, relating to the field of battery processing technology. It includes a first rotating mechanism, a second rotating mechanism, and a battery cell fixture. The first rotating mechanism is movable relative to the second rotating mechanism. The battery cell fixture is mounted on the first rotating mechanism and includes a first clamping mechanism and a second clamping mechanism. The two first clamping mechanisms are located on opposite sides of the first rotating mechanism, and the second clamping mechanism is located on one side of the first rotating mechanism. In this utility model, the first and second clamping mechanisms are distributed in different directions and, in conjunction with the second rotating mechanism, can apply pressure to the long battery cell from three directions, securing it omnidirectionally. This effectively prevents displacement during welding, improves welding quality, and ensures the quality and lifespan of the battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery processing technology, and in particular to a welding fixture for the periphery of a battery cell. Background Technology

[0002] In the battery manufacturing industry, the manufacturing process of battery cells is becoming increasingly critical, with the perimeter welding of the cell casing and cover plate being a crucial step in the entire manufacturing process. Currently, battery cells on the market mainly come in three types: cylindrical, pouch, and prismatic. For prismatic cells, most existing tooling is designed for short cells. It primarily includes a rotating mechanism to drive the cell's rotation, and positioning fixtures mounted on the rotating mechanism to hold the cell. These positioning fixtures are generally custom-made for the dimensions of short cells.

[0003] However, using existing short-cell tooling to weld long cells presents several challenges. Due to their considerable length, long cells are difficult to position precisely within existing tooling. Existing short-cell tooling is primarily designed to accommodate the size and shape of short cells; for long cells, the tooling cannot effectively limit and secure their ends and sides. During welding, long cells are prone to minute displacements, which, when accumulated, can cause welding trajectory deviations, thus affecting welding quality. Utility Model Content

[0004] The purpose of this utility model is to provide a welding fixture around the battery cell to solve the above-mentioned technical problems.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A battery cell peripheral welding fixture includes a first rotating mechanism, a second rotating mechanism, and a battery cell fixture. The first rotating mechanism is movable relative to the second rotating mechanism. The battery cell fixture is disposed on the first rotating mechanism. The battery cell fixture includes a first clamping mechanism and a second clamping mechanism. The first clamping mechanism is disposed on both sides of the first rotating mechanism, and the second clamping mechanism is disposed on one side of the first rotating mechanism.

[0007] Preferably, the first rotating mechanism has a positioning hole, and the clamping mechanism is installed around the positioning hole.

[0008] Preferably, the positioning hole extends through the first rotating mechanism, and the second rotating mechanism is located on one side of the first rotating mechanism.

[0009] As a further preferred embodiment, both the first pressing mechanism and the second pressing mechanism include a cylinder and a pressing plate, the cylinder being connected to the first rotating mechanism, and the pressing plate being connected to the piston rod of the cylinder.

[0010] As a further preferred embodiment, the system also includes a first fixing plate and a second fixing plate, wherein the first fixing plate is arranged parallel to the second fixing plate, the first fixing plate is located on the other side of the first rotating mechanism, and one end of the second fixing plate passes through the positioning hole and extends to one side of the first rotating mechanism.

[0011] As a further preferred embodiment, the upper inner wall of the positioning hole is in the same plane as the lower surface of the first fixing plate.

[0012] Preferably, the first pressing mechanism is distributed along a first direction, the second pressing mechanism is distributed along a second direction, and the second rotating mechanism is distributed along a third direction.

[0013] As a further preferred embodiment, one end of the second fixing plate is provided with a reinforcing rib, which is connected to the second rotating mechanism.

[0014] As a further preferred embodiment, the second rotating mechanism includes a connecting rod and a top plate, one end of the connecting rod being connected to the top plate, and the top plate being positioned directly opposite the positioning hole.

[0015] Preferably, the first rotating mechanism has baffles on both sides, and the first pressing mechanism and the second pressing mechanism are mounted on the baffles.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] (1) In this utility model, the first pressing mechanism and the second pressing mechanism are distributed in different directions and are combined with the second rotating mechanism to apply pressure to the long battery cell from three directions, fix the long battery cell in all directions, effectively prevent it from shifting during welding, improve welding quality, and ensure the quality and service life of the battery cell.

[0018] (2) In this utility model, the cross-section of the positioning hole is rectangular, and together with the first fixing plate and the second fixing plate, it can provide a basis for positioning the long battery cell, ensure the initial position of the long battery cell is accurate, and precisely constrain the long battery cell in the vertical direction, so that the long battery cell is stable in the tooling. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the welding fixture around the battery cell in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the first rotating mechanism in this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second fixing plate in this utility model;

[0022] Figure 4This is a schematic diagram of the clamping plate in the second clamping mechanism;

[0023] Figure 5 This is a schematic diagram of the first pressing mechanism in this utility model.

[0024] In the figure: 1. First rotating mechanism; 2. Second rotating mechanism; 3. First pressing mechanism; 4. Second pressing mechanism; 5. Positioning hole; 6. Cylinder; 7. Pressing plate; 8. First fixing plate; 9. Second fixing plate; 10. Reinforcing rib; 11. Connecting rod; 12. Top plate; 13. Baffle; 14. Long battery cell. Detailed Implementation

[0025] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of 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.

[0028] Figure 1 This is a schematic diagram of the welding fixture around the battery cell in this utility model; Figure 2 This is a schematic diagram of the structure of the first rotating mechanism in this utility model; Figure 3 This is a schematic diagram of the structure of the second fixing plate in this utility model; Figure 4 This is a schematic diagram of the clamping plate in the second clamping mechanism; Figure 5This is a structural schematic diagram of the first clamping mechanism in this utility model. Please refer to [link / reference]. Figures 1 to 5 The diagram illustrates a preferred embodiment of a battery cell peripheral welding fixture, comprising a first rotating mechanism 1, a second rotating mechanism 2, and a battery cell fixture. The first rotating mechanism 1 is movable relative to the second rotating mechanism 2. The battery cell fixture is mounted on the first rotating mechanism 1 and includes a first clamping mechanism 3 and a second clamping mechanism 4. The two first clamping mechanisms 3 are located on opposite sides of the first rotating mechanism 1, and the second clamping mechanism 4 is located on one side of the first rotating mechanism 1. In this embodiment, the first rotating mechanism 1 can be connected to an external first driving mechanism, and the second rotating mechanism 2 can be connected to an external second driving mechanism. The first driving mechanism drives the first rotating mechanism 1 to move horizontally and rotate, and the second driving mechanism drives the second rotating mechanism 2 to rotate. When a long battery cell 14 is installed inside the first rotating mechanism 1, moving the first rotating mechanism 1 moves the long battery cell 14, causing the cover plate on the first side of the long battery cell 14 to abut against the second rotating mechanism 2, thereby positioning the first side of the long battery cell 14, which is the surface facing the second rotating mechanism 2. The first drive mechanism may include a first motor and a first hydraulic cylinder. The first motor is located at the output end of the first hydraulic cylinder, and the output end of the first motor can be connected to the side wall of the baffle 13 in the first rotating mechanism 1. The first motor drives the first rotating mechanism 1 to rotate, thereby driving the long battery cell 14 to rotate. The first hydraulic cylinder can drive the first motor and the first rotating mechanism 1 to move. The second drive mechanism may be a second motor, which is directly connected to the connecting rod 11 in the second rotating mechanism 2, and is used to drive the second rotating machine to rotate.

[0029] By setting up the first clamping mechanism 3 and the second clamping mechanism 4, the two first clamping mechanisms 3 can position the shell on the second side of the long battery cell 14, and the second clamping mechanism 4 is located above one of the first clamping mechanisms 3 and is used to position the shell on the upper side of the long battery cell 14. In this embodiment, three clamping mechanisms are set up in different directions and cooperate with the second rotating mechanism 2 to achieve positioning of the long battery cell 14 in three directions. With the setting of the positioning hole 5, the long battery cell 14 is clamped, effectively preventing it from shifting during welding. This can greatly improve the positioning accuracy of the long battery cell 14, making the welding trajectory accurate, the weld uniform and firm, reducing problems such as false welding and missing welding, thereby improving the sealing performance and overall performance of the long battery cell 14, ultimately improving the peripheral welding yield, and ensuring the quality and service life of the long battery cell 14.

[0030] In this embodiment, the first drive mechanism, the second drive mechanism, and the cylinder 6 are all connected to an external controller, such as a PLC controller. The controller can control the operation of the first drive mechanism, the second drive mechanism, and the cylinder 6. The controller can input operating parameters to achieve automatic control.

[0031] Furthermore, as a preferred embodiment, the first rotating mechanism 1 has a positioning hole 5, and the clamping mechanism is installed around the positioning hole 5. The positioning hole 5 has a rectangular cross-section and is used to install the long battery cell 14. When the two first clamping mechanisms 3 press against the long battery cell 14, the side of the long battery cell 14 can abut against the inner wall of one side of the positioning hole 5, thereby fixing the position of the long battery cell 14.

[0032] Furthermore, as a preferred embodiment, the positioning hole 5 penetrates through the first rotating mechanism 1, and the second rotating mechanism 2 is located on one side of the first rotating mechanism 1. The positioning hole 5 facilitates the insertion of the long battery cell 14.

[0033] Furthermore, as a preferred embodiment, both the first clamping mechanism 3 and the second clamping mechanism 4 include a cylinder 6 and a clamping plate 7. The cylinder 6 is connected to the first rotating mechanism 1, and the clamping plate 7 is connected to the piston rod of the cylinder 6. In this embodiment, the cylinder 6 can quickly extend and retract its piston rod, enabling the clamping plate 7 to quickly fix and release the long battery cell 14. This convenient design reduces the clamping and disassembly time of the long battery cell 14, improves the production rhythm, and further enhances the overall production efficiency. The structure of the clamping plate 7 in the first clamping mechanism 3 is slightly different from that in the second clamping mechanism 4; for details, please refer to [link to relevant documentation]. Figure 4 and Figure 5 As shown, this configuration allows for adaptation to different sides of the long battery cell 14.

[0034] Furthermore, as a preferred embodiment, it also includes a first fixing plate 8 and a second fixing plate 9. The first fixing plate 8 and the second fixing plate 9 are arranged parallel to each other. The first fixing plate 8 is located on the other side of the first rotating mechanism 1, and one end of the second fixing plate 9 passes through the positioning hole 5 and extends to one side of the first rotating mechanism 1. The first fixing plate 8 and the second fixing plate 9 are arranged parallel to each other and work in conjunction with the positioning hole 5. The positioning hole 5 provides a reference for the installation of various components of the tooling and the positioning of the long battery cell 14, ensuring the accuracy of the initial position of the long battery cell 14. The fixing plate limits the long battery cell 14 from the vertical direction, further improving the positioning accuracy. The two work together to achieve precise constraint on the long battery cell 14, making the position of the long battery cell 14 stable in the tooling, laying the foundation for high-quality welding.

[0035] Furthermore, as a preferred embodiment, the upper inner wall of the positioning hole 5 is in the same plane as the lower surface of the first fixing plate 8, so that the first fixing plate 8 can abut against the housing on the upper side of the long battery cell 14 to achieve positioning of the long battery cell 14.

[0036] Furthermore, as a preferred embodiment, the two first pressing mechanisms 3 are distributed along a first direction, the second pressing mechanism 4 is distributed along a second direction, and the second rotating mechanism 2 is distributed along a third direction. For details, please refer to [link to relevant documentation]. Figure 1The directions shown are as follows: the first direction is left and right, the second direction is up and down, and the third direction is front and back, similar to the X-axis, Z-axis, and Y-axis in a coordinate system.

[0037] Furthermore, as a preferred embodiment, a reinforcing rib 10 is provided at one end of the second fixed plate 9. The reinforcing rib 10 is connected to the second rotating mechanism 2, enhancing the stability of the overall tooling structure. During long-term use, the second fixed plate 9 is not easily loosened due to vibration or other factors, maintaining high-precision positioning performance. Stable positioning ensures stable welding quality, reduces product defect rates caused by tooling failures, and lowers production costs. The second fixed plate 9 can be connected to the baffle 13 of the first rotating mechanism 1 via bolts.

[0038] Furthermore, as a preferred embodiment, the second rotating mechanism 2 includes a connecting rod 11 and a top plate 12. One end of the connecting rod 11 is connected to the top plate 12. The top plate 12 is positioned opposite the positioning hole 5. When the first rotating mechanism 1 drives the long battery cell 14 to move closer to the second rotating mechanism 2, the long battery cell 14 will abut against the top plate 12.

[0039] Furthermore, as a preferred embodiment, the first rotating mechanism 1 has baffles 13 on both sides, and the first pressing mechanism 3 and the second pressing mechanism 4 are mounted on the baffles 13. In this embodiment, the cylinders 6 in the first pressing mechanism 3 and the second pressing mechanism 4 are connected to the corresponding baffles 13 by bolts.

[0040] In use, the long battery cell 14 is first inserted into the positioning hole 5. Then, the controller controls the first rotating mechanism 1 to move closer to the second rotating mechanism 2, so that the cover plate on the first side of the long battery cell 14 abuts against the baffle 13 in the second rotating mechanism 2. Then, the cylinder 6 is controlled to drive the pressing plate 7 to move, so that the pressing plate 7 in the first pressing mechanism 3 abuts against the shell on the second side of the long battery cell 14, and the pressing plate 7 in the second pressing mechanism 4 abuts against the shell on the upper surface of the long battery cell 14. Then, the first rotating mechanism 1 and the second rotating mechanism 2 are driven to rotate synchronously, and the external welding equipment is started to perform peripheral welding operations on the shell and cover plate of the long battery cell 14.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electrode periphery welding tool, characterized by comprising: The device includes a first rotating mechanism, a second rotating mechanism, and a battery cell fixture. The first rotating mechanism is movable relative to the second rotating mechanism. The battery cell fixture is mounted on the first rotating mechanism and includes a first pressing mechanism and a second pressing mechanism. The first pressing mechanism is located on both sides of the first rotating mechanism, and the second pressing mechanism is located on one side of the first rotating mechanism.

2. The cell perimeter welding tooling of claim 1, wherein, The first rotating mechanism has a positioning hole, and the clamping mechanism is installed around the positioning hole.

3. The cell perimeter welding tool of claim 2, wherein the first and second electrodes are configured to be moved in a direction that is substantially parallel to the first and second electrodes. The positioning hole passes through the first rotating mechanism, and the second rotating mechanism is located on one side of the first rotating mechanism.

4. The cell periphery welding fixture as described in claim 2, characterized in that, Both the first pressing mechanism and the second pressing mechanism include a cylinder and a pressing plate. The cylinder is connected to the first rotating mechanism, and the pressing plate is connected to the piston rod of the cylinder.

5. The cell periphery welding fixture as described in claim 2, characterized in that, It also includes a first fixing plate and a second fixing plate. The first fixing plate and the second fixing plate are arranged in parallel. The first fixing plate is located on the other side of the first rotating mechanism, and one end of the second fixing plate passes through the positioning hole and extends to one side of the first rotating mechanism.

6. The cell periphery welding fixture as described in claim 5, characterized in that, The upper inner wall of the positioning hole is in the same plane as the lower surface of the first fixing plate.

7. The cell periphery welding fixture as described in claim 1, characterized in that, The first pressing mechanism is distributed along a first direction, the second pressing mechanism is distributed along a second direction, and the second rotating mechanism is distributed along a third direction.

8. The cell periphery welding fixture as described in claim 5, characterized in that, One end of the second fixed plate is provided with a reinforcing rib, which is connected to the second rotating mechanism.

9. The cell periphery welding fixture as described in claim 2, characterized in that, The second rotating mechanism includes a connecting rod and a top plate. One end of the connecting rod is connected to the top plate, and the top plate is positioned directly opposite the positioning hole.

10. The cell periphery welding fixture as described in claim 1, characterized in that, The first rotating mechanism has baffles on both sides, and the first pressing mechanism and the second pressing mechanism are mounted on the baffles.

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