Pressing module and pole piece slitting device

Abstract

The utility model relates to the technical field of lithium ion battery processing, in particular to a pressing module and a pole piece slitting device. Comprising a connecting arm, a cross beam, a pressing wheel and a pre-tightening piece, and one end of the connecting arm is used for being connected with a driving mechanism; the cross beam is arranged at the other end of the connecting arm and can swing on the connecting arm to adjust the heights of the two ends of the cross beam; the pressing wheel is rotatably arranged on the side, away from the connecting arm, of the cross beam. The pre-tightening piece is arranged at the end, close to the cross beam, of the connecting arm and can fix the cross beam and the connecting arm. In the actual application process of the structure, when the pressing module is installed, the problem that the pressing force on the two sides of the pressing wheel in the length direction and the pressing force on the two sides of the pole piece are not uniform can be solved, and overpressure on one side and underpressure on the other side of a formed roll material are prevented, so that the phenomena that the thickness of one side of the formed roll material is accumulated, the roll material is of a tower-shaped structure, and the production efficiency is improved are avoided. Quality problems such as waving of the edge of the pole piece are reduced, the quality of roll material rolling is improved, and the pole piece can be conveniently used in the follow-up process.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery processing technology, and in particular to a pressing module and an electrode slitting device. Background Technology

[0002] After lithium-ion batteries are slit into electrodes, a clamping module is necessary to press the electrodes firmly during the winding process. Currently, the electrode slitting clamping module cannot guarantee that the left and right sides of the electrode are clamped with the same force during installation and use, resulting in inconsistent winding tightness on both sides. As the roll diameter increases, the thickness accumulates on one side of the roll, forming a tower-like structure. This also easily causes wavy edges on the electrodes, which is detrimental to their use in subsequent processes. Utility Model Content

[0003] The technical problem to be solved by this utility model embodiment is to provide a pressing module to solve the problem in the prior art where the thickness of the coil accumulates on one side, the entire coil has a tower-like structure, and it is also very easy to cause wavy edges on the electrode sheet, which is not conducive to the use of the electrode sheet in subsequent processes.

[0004] This utility model discloses a clamping module, including: a connecting arm, a crossbeam, a pressure roller, and a pre-tightening member. One end of the connecting arm is used to connect to a drive mechanism; the crossbeam is located at the other end of the connecting arm and can swing on the connecting arm to adjust the height of both ends of the crossbeam; the pressure roller is rotatably located on the side of the crossbeam away from the connecting arm; the pre-tightening member is located at the end of the connecting arm near the crossbeam and can fix the crossbeam and the connecting arm.

[0005] Optionally, a mounting base is provided on the crossbeam, the connecting arm is inserted into the mounting base, and the preload is threadedly connected to the connecting arm.

[0006] Optionally, the mounting base is located at the center of the crossbeam along its length.

[0007] Optionally, the clamping module further includes: a mounting frame; the mounting frame is located on the side of the crossbeam away from the connecting arm, the side of the mounting frame away from the crossbeam forms an installation space with an opening, and an installation shaft is provided in the installation space along the length direction of the mounting frame, and the pressure roller is rotatably sleeved on the installation shaft.

[0008] Optionally, a bearing is provided between the pressure roller and the mounting shaft.

[0009] Optionally, the clamping module further includes: a first elastic adjustment component and a second elastic adjustment component, both of which are used to connect the crossbeam and the mounting frame, and are located on both sides of the connecting arm along the length of the crossbeam; the first elastic adjustment component and the second elastic adjustment component are capable of elastic deformation in the vertical direction to adjust the height of the pressure roller and balance the clamping force on both sides of the pressure roller in the length direction.

[0010] Optionally, the first elastic adjustment assembly includes a first connecting rod, a first elastic element sleeved on the first connecting rod, and a first fastener; the second elastic adjustment assembly includes a second connecting rod, a second elastic element sleeved on the first connecting rod, and a second fastener; one end of the first connecting rod is fixedly connected to the mounting frame, and the other end is movably inserted into the crossbeam and extends out of the crossbeam; the first fastener is provided on the portion of the first connecting rod extending out of the crossbeam; one end of the second connecting rod is fixedly connected to the mounting frame, and the other end is movably inserted into the crossbeam and extends out of the crossbeam; the second fastener is provided on the portion of the second connecting rod extending out of the crossbeam.

[0011] Optionally, the first fastener is threaded to the first connecting rod, and the second fastener is threaded to the second connecting rod.

[0012] Optionally, the first elastic element and the second elastic element have the same specifications and are both helical springs.

[0013] This utility model also discloses an electrode slitting device, which includes the aforementioned pressing module.

[0014] Compared with the prior art, the advantages of the pressing module and electrode slitting device provided in this utility model embodiment are as follows: the pressing module is connected to the driving mechanism during use, and the height of the pressing module is controlled by the driving mechanism so that the pressing module can be located on one side of the coil (not shown in the figure) and can press the electrode on the coil; specifically, one end of the connecting arm is connected to the driving mechanism, and the driving mechanism is used to control the reciprocating motion of the connecting arm, thereby adjusting the height of the connecting arm so that the overall height of the pressing module changes; a crossbeam is provided at the other end of the connecting arm, and the crossbeam can swing on the connecting arm to adjust the height of both ends of the crossbeam so that the pressure rollers on both sides of the length direction correspond to the outer surfaces of the two sides of the electrode on the coil and press the electrode. Then, the pre-tightening member is operated so that the pre-tightening member can fix the crossbeam and the connecting arm, fix the crossbeam on the connecting arm, and maintain the state of the pressure roller pressing the electrode. In practical applications, the above structure can avoid uneven pressure on both sides of the electrode sheet when installing the clamping module. It prevents over-pressure on one side of the coil and under-pressure on the other, thus avoiding thickness accumulation on one side of the coil. The coil has a tower-like structure, reducing quality problems such as edge wavy patterns on the electrode sheet and improving the quality of coil winding, so that the electrode sheet can be used in subsequent processes. Attached Figure Description

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0016] Figure 1 This is a three-dimensional schematic diagram of the clamping module provided in this embodiment of the utility model;

[0017] Figure 2 This is a front view of the clamping module provided in this embodiment of the utility model;

[0018] Figure 3 This is a side view of the clamping module provided in an embodiment of the present invention;

[0019] Figure 4 This is a top view of the clamping module provided in this embodiment of the utility model.

[0020] The labels for the attached figures are as follows:

[0021] 10. Connecting arm; 20. Crossbeam; 210. Mounting base; 30. Preload; 40. Pressure roller; 50. Mounting frame; 501. Opening; 510. Mounting shaft; 60. First elastic adjustment assembly; 610. First connecting rod; 620. First elastic element; 70. Second elastic adjustment assembly; 710. Second connecting rod; 720. Second elastic element. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] This utility model embodiment provides a clamping module, such as Figures 1 to 4 As shown, the device includes a connecting arm 10, a crossbeam 20, a pressure roller 40, and a pretensioner 30. One end of the connecting arm 10 is used to connect to a drive mechanism (not shown in the figure). The crossbeam 20 is located at the other end of the connecting arm 10 and can swing on the connecting arm 10 to adjust the height of both ends of the crossbeam 20. The pressure roller 40 is rotatably located on the side of the crossbeam 20 away from the connecting arm 10. The pretensioner 30 is located at the end of the connecting arm 10 near the crossbeam 20 and can fix the crossbeam 20 and the connecting arm 10.

[0024] The clamping module is connected to the drive mechanism during use. Under the drive mechanism, the height of the clamping module is controlled so that it can be positioned on one side of the coil (not shown in the figure) and can clamp the electrode sheet on the coil. Specifically, one end of the connecting arm 10 is connected to the drive mechanism, which controls the reciprocating motion of the connecting arm 10 to adjust its height, thereby changing the overall height of the clamping module. A crossbeam 20 is provided at the other end of the connecting arm 10. The crossbeam 20 can swing on the connecting arm 10, and the height of both ends of the crossbeam 20 is adjusted so that the pressure rollers 40 are aligned with the outer surfaces of the electrode sheets on both sides of the coil along the length direction and clamp the electrode sheets. Then, the pre-tightening member 30 is operated to fix the crossbeam 20 and the connecting arm 10, fixing the crossbeam 20 to the connecting arm 10 and maintaining the state of the pressure rollers 40 clamping the electrode sheets. In practical applications, the above structure can avoid uneven pressure on both sides of the electrode sheet when installing the clamping module. It prevents over-pressure on one side of the coil and under-pressure on the other, thus avoiding thickness accumulation on one side of the coil. The coil has a tower-like structure, reducing quality problems such as edge wavy patterns on the electrode sheet and improving the quality of coil winding, so that the electrode sheet can be used in subsequent processes.

[0025] In this embodiment, the driving mechanism can be a cylinder. The cylinder controls the pressing module to rise or fall, so that the entire pressing module presses the electrode sheet or moves away from the electrode sheet.

[0026] In this embodiment, the pressure roller 40 rotates with the rotation of the coil, thereby flattening the electrode surface of the coil.

[0027] In this embodiment, the appendix Figure 1 In this diagram, the Z direction represents the height direction, and the X direction represents the length direction.

[0028] In this embodiment, the length of the pressure roller 40 is set to be sufficient to cover the electrode sheet on the coil, and no specific limitation is made here.

[0029] As a preferred embodiment of this invention, such as Figure 1 and Figure 2 As shown, a mounting base 210 is provided on the crossbeam 20, the connecting arm 10 is inserted into the mounting base 210, and the pre-tightening member 30 is threadedly connected to the connecting arm 10.

[0030] The mounting base 210 provided on the crossbeam 20 provides a stable installation environment for the connection between the connecting arm 10 and the crossbeam 20. The connecting arm 10 is inserted into the mounting base 210, and the pre-tightening member 30 is threadedly connected to the connecting arm 10. By controlling the pre-tightening member 30 to screw in or out on the connecting arm 10, the crossbeam 20 can swing on the connecting arm 10. The pressure roller 40 is adjusted to press the electrode plates on both sides in the length direction, and then the crossbeam 20 is fixed on the connecting arm 10.

[0031] In this embodiment, the preload 30 can be a nut, which is convenient to operate and use, and improves the ease of use of the clamping module.

[0032] As a preferred embodiment of this invention, such as Figure 1 , Figure 2 and Figure 4 As shown, the mounting base 210 is located at the center of the crossbeam 20 along the length of the crossbeam 20.

[0033] The mounting base 210 is positioned at the center of the crossbeam 20, ensuring that the crossbeam 20 is symmetrically arranged on both sides of the connecting arm 10. This avoids the problem of inconsistent lever arms on both sides of the pressure roller 40 after the pressing module is pressed down, guaranteeing that the pressing module presses the electrode sheet on both sides of the coil with the same force. This improves the winding quality of the coil and facilitates the use of the electrode sheet in subsequent processes.

[0034] As a preferred embodiment of this invention, such as Figures 1 to 4 As shown, the clamping module also includes: a mounting frame 50, which is located on the side of the crossbeam 20 away from the connecting arm 10. The side of the mounting frame 50 away from the crossbeam 20 forms an installation space with an opening 501. Along the length of the mounting frame 50, an installation shaft 510 is provided in the installation space, and the pressure roller 40 is rotatably sleeved on the installation shaft 510.

[0035] In this embodiment, the pressure roller 40 is mounted using a mounting frame 50. Specifically, an installation space with an opening 501 is formed on the side of the mounting frame 50 away from the crossbeam 20 to provide space for the pressure roller 40. A mounting shaft 510 is provided within the installation space along the length of the mounting frame 50 to provide a stable installation environment for the pressure roller 40, allowing the pressure roller 40 to be rotatably mounted on the mounting shaft 510. This method of fixing the pressure roller 40 is stable and reliable, and can flatten the electrode sheets on the coil during use.

[0036] As a preferred embodiment, a bearing (not shown in the figure) is provided between the pressure roller 40 and the mounting shaft 510.

[0037] The bearing configuration reduces the friction between the pressure roller 40 and the mounting shaft 510, thereby reducing energy loss, improving the rolling efficiency of the pressure roller 40, enhancing the smoothness and continuity of the pressing module, and ultimately improving the working efficiency of the coil.

[0038] As a preferred embodiment of this invention, such as Figure 2 As shown, the clamping module also includes: a first elastic adjustment component 60 and a second elastic adjustment component 70. Both the first elastic adjustment component 60 and the second elastic adjustment component 70 are used to connect the crossbeam 20 and the mounting frame 50, and the first elastic adjustment component 60 and the second elastic adjustment component 70 are located on both sides of the connecting arm 10 along the length direction of the crossbeam 20. The first elastic adjustment component 60 and the second elastic adjustment component 70 can undergo elastic deformation in the vertical direction to adjust the height of the pressure roller 40 and balance the clamping force on both sides of the pressure roller 40 in the length direction.

[0039] In actual use, as the diameter of the electrode sheets wound on the coil increases, the coil compresses the pressure roller 40, causing the first elastic adjustment component 60 and the second elastic adjustment component 70 to be subjected to compressive force. The first elastic adjustment component 60 and the second elastic adjustment component 70 undergo elastic deformation along the height direction, while the pressure roller 40 moves away from the coil. This allows the position of the pressure roller 40 in the height direction to adaptively adjust as the coil diameter increases, improving the smoothness of operation and the flexibility of use of the pressing module in this embodiment. When the diameter of the coil changes on either side of the length direction, the first elastic adjustment component 60 and the second elastic adjustment component 70 can balance the pressing force on both sides of the pressure roller 40 in the length direction, ensuring that the pressure roller 40 is always in close contact with and presses the coil on both sides of the length direction, guaranteeing the pressure of the pressure roller 40 on the coil.

[0040] As a preferred embodiment of this invention, such as Figures 1 to 4As shown, the first elastic adjustment assembly 60 includes a first connecting rod 610, a first elastic element 620 sleeved on the first connecting rod 610, and a first fastener (not shown in the figure). The second elastic adjustment assembly 70 includes a second connecting rod 710, a second elastic element 720 sleeved on the first connecting rod 610, and a second fastener (not shown in the figure). One end of the first connecting rod 610 is fixedly connected to the mounting frame 50, and the other end is movably disposed on the crossbeam 20 and extends out of the crossbeam 20. The first fastener is disposed on the portion of the first connecting rod 610 that extends out of the crossbeam 20. One end of the second connecting rod 710 is fixedly connected to the mounting frame 50, and the other end is movably disposed on the crossbeam 20 and extends out of the crossbeam 20. The second fastener is disposed on the portion of the second connecting rod 710 that extends out of the crossbeam 20.

[0041] In practical applications, as the diameter of the coil increases, a thrust is applied to the pressure roller 40. Under the action of this thrust, the mounting frame 50 tends to move closer to the crossbeam 20. Because the first connecting rod 610 and the second connecting rod 710 are movably inserted into the crossbeam 20, the mounting frame 50 moves closer to the crossbeam 20 and squeezes the first elastic element 620 and the second elastic element 720, causing the pressure roller 40 to move closer to the crossbeam 20. This achieves the purpose of adaptively adjusting the vertical height of the pressure roller 40 as the diameter of the coil increases, thereby improving the smoothness of operation and the flexibility of use of the pressing module in this embodiment. Meanwhile, when there is a slight difference in the thickness of the incoming electrode sheet, it causes a slight difference in the diameter of the coil on both sides in the length direction. When the diameter of the coil increases on the side closer to the first elastic member 620, the first elastic member 620 is squeezed, so that the pressure roller 40 located on the side of the second elastic member 720 presses the coil tightly. Similarly, when the diameter of the coil increases on the side closer to the second elastic member 720, the second elastic member 720 is squeezed, so that the pressure roller 40 located on the side of the first elastic member 620 presses the coil tightly, so as to balance the pressing force of the pressure roller 40 on both sides in the length direction, ensuring that the pressure roller 40 can press the electrode sheet on both sides in the length direction, thereby eliminating the imbalance of pressure on both sides of the electrode sheet and ensuring improved quality of coil winding.

[0042] When the first elastic member 620 and the second elastic member 720 are in a free state, their two ends abut against the mounting frame 50 and the crossbeam 20, respectively.

[0043] As a preferred embodiment, the first fastener and the first connecting rod 610 are threaded together, and the second fastener and the second connecting rod 710 are threaded together.

[0044] The threaded connection described above facilitates the installation of the first fastener on the first connecting rod 610 and the second fastener on the second connecting rod 710, and ensures the stability and robustness of the connection.

[0045] In this embodiment, the first fastener and the second fastener can be nuts.

[0046] As a preferred embodiment of this invention, such as Figure 1 and Figure 2 As shown, the first elastic element 620 and the second elastic element 720 have the same specifications and are both helical springs.

[0047] The first elastic element 620 and the second elastic element 720 are of the same specifications. When adjusting the position of the pressure roller 40 in the vertical direction, the adjustment range of the pressure roller 40 on the left and right sides in the length direction can be kept consistent, thereby ensuring the pressing force of the pressure roller 40 on both sides of the roll length direction so that the tension of the electrode sheet is consistent.

[0048] The first elastic element 620 and the second elastic element 720 are set as helical springs, which are convenient to be sleeved on the first connecting rod 610 and the second connecting rod 710. The helical springs have the advantages of high elasticity, high reliability, strong load-bearing capacity and long service life, which can ensure the working stability of the pressing module.

[0049] This application also discloses an electrode slitting device, including the pressing module in the foregoing embodiments. This electrode slitting device has the same structure and beneficial effects as the pressing module in the foregoing embodiments. The structure and beneficial effects of the pressing module have been described in detail in the foregoing embodiments and will not be repeated here.

[0050] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A clamping module, characterized in that, include: A connecting arm, one end of which is used to connect to a drive mechanism; A crossbeam is located at the other end of the connecting arm, and the crossbeam can swing on the connecting arm to adjust the height of both ends of the crossbeam. The pressure roller is rotatably located on the side of the crossbeam opposite to the connecting arm; A preload is provided at one end of the connecting arm near the crossbeam, and the preload can fix the crossbeam and the connecting arm.

2. The clamping module according to claim 1, characterized in that, A mounting base is provided on the crossbeam, the connecting arm is inserted into the mounting base, and the preload is threadedly connected to the connecting arm.

3. The clamping module according to claim 2, characterized in that, The mounting base is located at the center of the crossbeam along its length.

4. The clamping module according to claim 3, characterized in that, The clamping module also includes: Mounting framework; The mounting frame is located on the side of the crossbeam away from the connecting arm. The side of the mounting frame away from the crossbeam forms an installation space with an opening. Along the length of the mounting frame, an installation shaft is provided in the installation space, and the pressure roller is rotatably sleeved on the installation shaft.

5. The clamping module according to claim 4, characterized in that, A bearing is provided between the pressure roller and the mounting shaft.

6. The clamping module according to claim 4, characterized in that, The clamping module also includes: A first elastic adjustment component and a second elastic adjustment component are both used to connect the crossbeam and the mounting frame, and the first elastic adjustment component and the second elastic adjustment component are located on both sides of the connecting arm along the length direction of the crossbeam. The first elastic adjustment component and the second elastic adjustment component are capable of elastic deformation in the vertical direction to adjust the height of the pressure roller and balance the clamping force on both sides of the pressure roller in the length direction.

7. The clamping module according to claim 6, characterized in that, The first elastic adjustment assembly includes a first connecting rod, a first elastic element sleeved on the first connecting rod, and a first fastener; the second elastic adjustment assembly includes a second connecting rod, a second elastic element sleeved on the first connecting rod, and a second fastener. One end of the first connecting rod is fixedly connected to the mounting frame, and the other end is movably inserted into the crossbeam and extends out of the crossbeam. The first fastener is provided on the part of the first connecting rod that extends out of the crossbeam. One end of the second connecting rod is fixedly connected to the mounting frame, and the other end is movably inserted into the crossbeam and extends out of the crossbeam. The second fastener is provided on the part of the second connecting rod that extends out of the crossbeam.

8. The clamping module according to claim 7, characterized in that, The first fastener is threadedly connected to the first connecting rod, and the second fastener is threadedly connected to the second connecting rod.

9. The clamping module according to claim 8, characterized in that, The first elastic element and the second elastic element have the same specifications and are both helical springs.

10. An electrode slitting device, characterized in that, Includes the clamping module as described in any one of claims 1 to 9.

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