Flatting mechanism for electrode foil unwinding

Abstract

The utility model relates to a kind of polar piece foil flattening mechanism for polar piece unwinding, including tension adjusting device and traction device, tension adjusting device is movably arranged in the position of traction device release polar piece, and tension adjusting device includes mounting seat, adjusting roller, driving motor, tension sensor, and mounting seat is drivingly connected with position adjusting device, adjusting roller includes the roller cylinder, expansion sleeve, sliding sleeve and adjusting screw pair that are coaxially arranged in order from inside to outside, the inner wall of roller cylinder is connected with expansion sleeve, expansion sleeve is installed in the inclined groove on sliding sleeve, and inclined groove is arranged along the axial direction of sliding sleeve, and sliding sleeve is connected with the nut cover of adjusting screw pair, adjusting screw pair is drivingly connected with driving motor, and roller cylinder has flexible roll surface with polar piece contact, driving motor moves sliding sleeve along axial direction by adjusting screw pair, and sliding sleeve moves expansion sleeve along radial direction by inclined groove, to drive the diameter change of roll surface.The utility model can avoid the fold of the foil area of polar piece, improve the quality of polar piece unwinding.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode production technology, and in particular to an electrode foil flattening mechanism for electrode unwinding. Background Technology

[0002] In the production process of lithium battery electrode sheets, the electrode sheets used for winding or stacking need to go through processes such as coating, rolling, slitting, and tab forming in sequence. Between two processes, the electrode sheets are wound into an electrode roll at the end of the previous process and unwound at the beginning of the next process.

[0003] The center of the electrode sheet is a coating area with slurry, while the edge is a foil area without slurry coating. The thickness of the foil area is less than that of the coating area. In the electrode coil state, both the coating area and the foil area are flattened. When the electrode sheet is released from the coil, the stress on the electrode sheet is released. However, the surface of the roller that guides the electrode sheet to unwind is flat, and the roller surface is basically in contact with the coating area, while the foil area is less likely to contact the roller surface. This results in an uneven tensile tension between the coating area and the foil area, which easily causes wrinkles in the foil area. This will affect the subsequent processing of the electrode sheet and reduce the quality of the electrode sheet. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an electrode foil flattening mechanism for electrode unwinding.

[0005] This utility model provides an electrode foil flattening mechanism for electrode unwinding, including a tension adjusting device and a traction device. The tension adjusting device is movably set at the position where the traction device releases the electrode via a position adjusting device. The tension adjusting device includes a mounting base and an adjusting roller, a drive motor, and a tension sensor mounted on the mounting base. The mounting base is driven by the position adjusting device. The adjusting roller includes a roller cylinder, a expanding sleeve, a sliding sleeve, and an adjusting screw pair arranged coaxially from the inside to the outside. The inner wall of the roller cylinder is connected to the expanding sleeve. The expanding sleeve is installed in an inclined groove on the sliding sleeve. The inclined groove is arranged along the axial direction of the sliding sleeve. The sliding sleeve is connected to the nut of the adjusting screw pair. The adjusting screw pair is driven by the drive motor. The roller cylinder has a flexible roller surface that contacts the electrode. The drive motor drives the sliding sleeve to move axially via the adjusting screw pair. The sliding sleeve drives the expanding sleeve to move radially via the inclined groove, thereby changing the diameter of the roller surface.

[0006] The two tension sensors are located on the side of the roller away from the traction device and are in contact with the foil areas on both sides of the electrode width direction. The two tension sensors detect the tension changes in the foil areas on both sides of the electrode. The position adjustment device drives the tension adjustment device to adjust its position along the electrode width direction to align the two tension sensors with the foil areas on both sides of the electrode.

[0007] In some embodiments, the two ends of the roller are connected to the mounting base through shaft heads with shaft holes, the transmission screw of the adjusting screw pair passes through the shaft holes of the two shaft heads, a first bearing is provided between the shaft head and the mounting base, a second bearing is provided between the transmission screw and the mounting base, and a third bearing is provided between the nut and the sliding sleeve of the adjusting screw pair.

[0008] In some embodiments, the expansion sleeve includes a plurality of tensioning blocks arranged along the outer circumference of the sleeve, the outer side of the tensioning block being configured as a connecting portion fixedly connected to the roller surface, and the inner side of the tensioning block being configured as a sliding portion slidingly contacting the inclined groove.

[0009] In some embodiments, the slope of the sloping groove is 2°-5°.

[0010] In some embodiments, the mounting base has a mounting plate on the outside of the roller, the tension sensor is mounted on the mounting plate, the tension sensor is mounted on a detection roller via a bracket, the detection roller is parallel to the roller and makes rolling contact with the foil area of ​​the electrode sheet.

[0011] In some embodiments, the position adjustment device includes an actuator, the drive end of which is provided with a push plate. The push plate is connected to a mounting base via a connecting rod. The mounting base is movably mounted on a base via a guide rail. The actuator drives the mounting base to move along the guide rail via the push plate and the connecting rod.

[0012] In some embodiments, the actuator is an electric cylinder, the drive end of which is pivotally connected to a push plate, and the other end of which is pivotally connected to a fixed seat, which is fixed to the frame by a fixing rod.

[0013] In some embodiments, a detection sensor is also included, which is communicatively connected to the drive motor. Two detection sensors are mounted on the side of the tension adjustment device away from the traction device via a mounting bracket. The two detection sensors detect the degree of wrinkling in the foil areas on both sides of the electrode sheet, respectively.

[0014] In some embodiments, the traction device includes a rotary motor and a hanging shaft. The rotary motor is connected to the hanging shaft via a transmission box. An electrode roll is sleeved on the hanging shaft. The rotary motor drives the hanging shaft to rotate, thereby causing the electrode roll to release the electrode sheet to the tension adjustment device.

[0015] In some embodiments, the diameter change at the contact point between the roller surface and the coating area of ​​the electrode is greater than the diameter change at the contact point with the foil area of ​​the electrode.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: by adjusting the position of the tension adjustment device through the position adjustment device, the electrode sheet is always aligned with the position set by the tension adjustment device, ensuring that the tension sensor can accurately detect the tension of the foil area. The adjusting screw pair drives the expansion sleeve to move radially through the inclined groove of the sliding sleeve to change the diameter of the roller surface, so that the tension of the foil area of ​​the electrode sheet and the coating area are kept consistent, and the foil area of ​​the electrode sheet that has just been released from the electrode roll is quickly flattened, avoiding wrinkles in the foil area and improving the quality of electrode unwinding. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an electrode foil flattening mechanism for electrode unwinding according to an embodiment of this application.

[0018] Figure 2 This is a schematic diagram of the assembly structure of the tension adjustment device and the position adjustment device according to an embodiment of this application.

[0019] Figure 3 This is a three-dimensional structural schematic diagram of the tension adjustment device according to an embodiment of this application.

[0020] Figure 4 This is a cross-sectional structural schematic diagram of the tension adjustment device according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of the structure of the adjusting roller when adjusting the tension of the electrode sheet according to an embodiment of this application.

[0022] Reference numerals: 1. Electrode roll; 11. Electrode sheet; 12. Coating area; 13. Foil area;

[0023] 2. Traction device; 21. Rotary motor; 22. Transmission box; 23. Hanging shaft; 24. Support frame;

[0024] 3. Tension adjustment device; 31. Base; 32. Guide rail; 33. Mounting seat; 34. Mounting plate;

[0025] 4. Adjusting roller; 41. Roller; 411. Roller surface; 412. Shaft end; 42. Expansion sleeve; 421. Tensioning block; 422. Connecting part; 423. Sliding part; 43. Sliding sleeve; 44. Inclined groove; 45. Drive screw; 46. Nut; 47. Drive motor; 48. Motor base; 49. Coupling;

[0026] 5. Tension sensor; 51. Detection roller; 52. Support;

[0027] 6. Position adjustment device; 61. Actuator; 62. Push plate; 63. Connecting rod; 64. Fixed base; 65. Fixed rod;

[0028] 71. First bearing; 72. Second bearing; 73. Third bearing;

[0029] 8. Detection sensor; 81. Mounting bracket. Detailed Implementation

[0030] The specific embodiments of this utility model are described with reference to the accompanying drawings.

[0031] refer to Figure 1 The figure shows a three-dimensional structural diagram of the electrode foil flattening mechanism used for electrode unwinding. The lower right side is the electrode roll 1, and the left side is the traction device 2 and the position adjustment device 6. The electrode roll 1 is released from bottom to top to the tension adjustment device 3, the tension sensor 5, and the detection sensor 8. The electrode roll 1 releases the electrode 11 through the traction device 2 to ensure that the electrode 11 travels normally.

[0032] refer to Figures 1 to 5 A sheet foil flattening mechanism for unwinding electrode sheets includes a tension adjusting device 3 and a traction device 2. The tension adjusting device 3 is movably positioned at the position where the traction device 2 releases the electrode sheet 11 via a position adjusting device 6. The tension adjusting device 3 includes a mounting base 33 and an adjusting roller 4, a drive motor 47, and a tension sensor 5 mounted on the mounting base 33. The mounting base 33 is drively connected to the position adjusting device 6. The adjusting roller 4 includes a roller 41, a tension sleeve 42, a sliding sleeve 43, and an adjusting screw pair arranged coaxially from the inside to the outside. The inner wall of the roller 41 is connected to the expansion sleeve 42. The expansion sleeve 42 is installed in the inclined groove 44 on the sliding sleeve 43. The inclined groove 44 is arranged along the axial direction of the sliding sleeve 43. The sliding sleeve 43 is connected to the nut 46 of the adjusting screw pair. The adjusting screw pair is connected to the drive motor 47. The roller 41 has a flexible roller surface 411 that contacts the electrode plate 11. The drive motor 47 drives the sliding sleeve 43 to move axially through the adjusting screw pair. The sliding sleeve 43 drives the expansion sleeve 42 to move radially through the inclined groove 44, so as to change the diameter of the roller surface 411.

[0033] Two tension sensors 5 are set on the side of the roller 41 away from the traction device 2 and are in contact with the foil areas 13 on both sides of the electrode 11 in the width direction. The two tension sensors 5 detect the tension changes of the foil areas 13 on both sides of the electrode 11. The position adjustment device 6 drives the tension adjustment device 3 to adjust its position along the width direction of the electrode 11 so as to align the two tension sensors 5 with the foil areas 13 on both sides of the electrode 11.

[0034] The electrode foil flattening mechanism for electrode unwinding in this application adjusts the position of the tension adjustment device 3 through the position adjustment device 6, so that the electrode 11 is always aligned with the position set by the tension adjustment device 3, ensuring that the tension sensor 5 can accurately detect the tension of the foil area 13. The adjusting screw pair drives the expansion sleeve 42 to move radially through the inclined groove 44 of the sliding sleeve 43, thereby changing the diameter of the roller surface 411, so that the tension of the foil area 13 of the electrode 11 is consistent with that of the coating area 12, and quickly flattens the foil area 13 of the electrode 11 that has just been released from the electrode roll 1, avoiding wrinkles in the foil area 13 and improving the quality of electrode unwinding.

[0035] To avoid interference with the rotation of roller 41 when adjusting the lead screw pair, in this embodiment, reference is made to... Figure 3 and Figure 4 The two ends of the roller 41 are connected to the mounting base 33 through shaft heads 412 with shaft holes. The transmission screw 45 of the adjusting screw pair passes through the shaft holes of the two shaft heads 412. A first bearing 71 is provided between the shaft head 412 and the mounting base 33, a second bearing 72 is provided between the transmission screw 45 and the mounting base 33, and a third bearing 73 is provided between the nut 46 of the adjusting screw pair and the sliding sleeve 43.

[0036] It should be further explained that the adjusting screw pair includes a transmission screw 45 and a nut 46. Most of the transmission screw 45 is located inside the roller 41. Both ends of the transmission screw 45 extend beyond the roller 41. One end is connected to the mounting base 33, and the other end extends out of the mounting base 33 and is connected to the drive motor 47 through the coupling 49. The drive motor 47 is fixed to the outside of the mounting base 33 through the motor base 48.

[0037] Understandably, the sliding sleeve 43, the expansion sleeve 42, and the roller 41 will rotate together. The roller 41 is guaranteed to rotate smoothly by the first bearing 71, and the transmission screw 45 is guaranteed to rotate smoothly by the second bearing 72. When the drive motor 47 drives the transmission screw 45 to rotate, the transmission screw 45 drives the nut 46 to translate axially through the thread. The nut 46 and the sliding sleeve 43 are connected by the third bearing 73, so that the sliding sleeve 43 will follow the nut 46 to translate axially. At the same time, the sliding sleeve 43 will rotate together with the roller 41, so that the rotation of the roller 41 will not be affected.

[0038] To ensure that the sliding sleeve 43 can smoothly drive the expanding sleeve 42 and the roller 41 to change their diameter, in this embodiment, reference is made to... Figure 4 The expansion sleeve 42 includes a plurality of tensioning blocks 421 arranged along the outer circumference of the sliding sleeve 43. The outer side of the tensioning block 421 is configured as a connecting part 422 fixedly connected to the roller surface 411, and the inner side of the tensioning block 421 is configured as a sliding part 423 that slides in contact with the inclined groove 44.

[0039] It should be further explained that the inclined groove 44 of the expansion sleeve 42 and the sliding sleeve 43 are in sliding contact. In order to ensure that the two can make stable contact, a spring can be sleeved between the multiple tensioning blocks 421 of the expansion sleeve 42. The spring presses the multiple tensioning blocks 421 together against the sliding sleeve 43, or the elasticity of the roller 41 itself can press the multiple tensioning blocks 421 together against the sliding sleeve 43, so that the sliding part 423 of the tensioning block 421 can make close contact with the inclined groove 44.

[0040] Understandably, the length of the connecting part 422 should be greater than that of the sliding part 423. The connecting part 422 should ensure sufficient contact area with the inner wall of the roller surface 411 to disperse the squeezing force of the tensioning block 421 on the roller surface 411. The shorter length of the sliding part 423 can reduce the sliding friction with the inclined groove 44, so that the tensioning block 421 can move smoothly along the inclined groove 44.

[0041] To avoid excessive changes in the diameter of the roller surface 411, in this embodiment, reference is made to... Figure 4 The slope of the inclined groove 44 is 2°-5°, wherein the slope of the inclined groove 44 is preferably 2°.

[0042] It is understandable that the thickness difference between the coating area 12 and the foil area 13 of the electrode 11 is 40-300 micrometers. The difference in tensile tension caused by the micrometer-level thickness difference is small. If the slope of the chute 44 is too large, the roller surface 411 is easy to over-adjust under the same displacement of the sliding sleeve 43, which is difficult to control and can easily cause cracks in the slurry of the coating area 12. Therefore, the slope of the chute 44 is preferably 2°, which can reduce the difficulty of control and facilitate real-time adjustment based on the detection of the detection sensor 8.

[0043] In order to detect the tension of the foil area 13 in real time, in this embodiment, reference is made to... Figure 3 The mounting base 33 has a mounting plate 34 on the outside of the roller 41. The tension sensor 5 is mounted on the mounting plate 34. The tension sensor 5 is mounted on the detection roller 51 through the bracket 52. The detection roller 51 is parallel to the roller 41 and makes rolling contact with the foil area 13 of the electrode 11.

[0044] Understandably, with this setup, the tension sensor 5 is a pressure sensor. After the electrode 11 passes through the adjusting roller 4 to adjust the tension of the coating area 12 and the foil area 13, the foil area 13 is flattened. The flattened foil area 13 immediately comes into contact with the detection roller 51. The detection roller 51 is subjected to the pressure of the electrode 11, and the pressure is transmitted to the tension sensor 5 through the bracket 52. The tension sensor 5 can detect the tension of the foil area 13 in real time. The detection roller 51 is relatively close to the roller 41, so it can quickly detect the tension of the foil area 13. The tension sensor 5 will feed back the value to the position adjustment device 6. When the tension values ​​detected by the two tension sensors 5 are inconsistent, the position adjustment device 6 will drive the tension adjustment device 3 to move, so that the tension adjustment device 3 moves laterally relative to the electrode 11, adjusting the position of the electrode 11 on the roller 41 until the tension data detected by the two tension sensors 5 are the same, thereby ensuring that the tension of the foil areas 13 on both sides of the electrode 11 is consistent.

[0045] In order to move the tension adjusting device 3, in this embodiment, reference is made to... Figure 1 and Figure 2 The position adjustment device 6 includes an actuator 61. The drive end of the actuator 61 is provided with a push plate 62. The push plate 62 is connected to the mounting base 33 through a connecting rod 63. The mounting base 33 is movably mounted on the base 31 through a guide rail 32. The actuator 61 drives the mounting base 33 to move along the guide rail 32 through the push plate 62 and the connecting rod 63.

[0046] It is understandable that the actuator 61 is a linear drive. As a power source, the actuator 61 pushes the mounting base 33 to move along the guide rail 32 through the push plate 62 and the connecting rod 63, so that the mounting base 33 and the roller 41 move linearly along the width direction of the pole piece 11. The displacement is calculated based on the data detected by the two tension sensors 5. It will be adjusted and fed back multiple times until the data detected by the two tension sensors 5 are the same.

[0047] To ensure that the actuator 61 can quickly drive the tension adjusting device 3 to move, in this embodiment, reference is made to... Figure 2 The actuator 61 is an electric cylinder. The drive end of the electric cylinder is pivotally connected to the push plate 62, and the other end of the electric cylinder is pivotally connected to the fixed seat 64. The fixed seat 64 is fixed to the frame (shown in the attached figure) by the fixed rod 65.

[0048] Understandably, actuator 61 is preferably an electric cylinder. Electric cylinders are excellent linear actuators with control precision up to 0.01mm and fast response speed. They can quickly drive the tension adjustment device 3 to move, thereby quickly adjusting the tension of the foil areas 13 on both sides of the electrode 11 to be consistent.

[0049] To detect whether the foil of electrode 11 is wrinkled, in this embodiment, reference is made to... Figure 1The electrode foil flattening mechanism for unwinding the electrode sheet also includes a detection sensor 8. The detection sensor 8 is connected in communication with the drive motor 47. The two detection sensors 8 are set on the side of the tension adjustment device 3 away from the traction device 2 via the mounting bracket 81. The two detection sensors 8 detect the degree of wrinkling of the foil area 13 on both sides of the electrode sheet 11.

[0050] Understandably, the detection sensor 8 can be a vision-type or laser-type sensor to detect the wrinkles in the foil area 13 in a non-contact manner and provide real-time feedback to the drive motor 47. This allows the drive motor 47 to adjust the diameter changes of the expansion sleeve 42 and the roller surface 411 in real time based on the detection results. After multiple adjustments and feedback, the data detected by the two detection sensors 8 are the same, thus achieving automatic closed-loop adjustment.

[0051] In order to achieve the unwinding of the electrode 11, in this embodiment, reference is made to... Figure 1 The traction device 2 includes a rotary motor 21 and a hanging shaft 23. The rotary motor 21 is connected to the hanging shaft 23 through a transmission box 22. The pole roll 1 is sleeved on the hanging shaft 23. The rotary motor 21 drives the hanging shaft 23 to rotate, so as to drive the pole roll 1 to release the pole piece 11 to the tension adjustment device 3.

[0052] It is understandable that the electrode roll 1 is placed on the hanging shaft 23 by the center positioning. The hanging shaft 23 is connected to the rotary motor 21 through the transmission box 22 and is set on the support frame 24. After the rotary motor 21 is powered on and rotates, it drives the hanging shaft 23 to rotate through the transmission box 22. The electrode roll 1 fixed on the hanging shaft 23 can rotate with the hanging shaft 23, so that the electrode roll 1 releases the electrode sheet 11 at a uniform speed.

[0053] In order to better adjust the tension of the coating area 12 and the foil area 13, in this embodiment, reference is made to... Figure 3 and Figure 4 The diameter change at the contact point between the roller surface 411 and the coating area 12 of the electrode 11 is greater than the diameter change at the contact point between the roller surface 411 and the foil area 13 of the electrode 11.

[0054] It is understandable that the expansion sleeve 42 is located at the center of the roller 41, the roller 41 at the expansion sleeve 42 has the largest diameter change, and the diameter change at both ends of the roller 41 is the smallest. The coating area 12 of the electrode 11 is located at the center, and the foil area 13 is located at both sides of the electrode 11 in the width direction. The foil area 13 is close to the end of the roller 41. The roller surface 411 at the expansion sleeve 42 supports the center of the coating area 12 of the electrode 11, forming an inverted V shape, so that the foil area 13 can be flattened. After the electrode 11 is flattened, it can be transported with greater tension to ensure that the foil area 13 will not wrinkle.

[0055] In this embodiment, the electrode 11 is released by the traction device 2, and the position adjustment device 6 keeps the electrode 11 aligned with the tension adjustment device 3 at a set position. When the electrode 11 passes the tension adjustment device 3, the tension of the coating area 12 and the foil area 13 of the electrode 11 is changed by the roller 41 with a variable diameter, so that the tension of the foil area 13 of the electrode 11 is consistent with that of the coating area 12, so that the foil area 13 can be flattened. During this period, the wrinkling of the foil area 13 is detected by the detection sensor 8, the detection data is fed back to the tension adjustment device 3, and the change in the diameter of the roller 41 is automatically adjusted until the foil area 13 of the electrode 11 is completely flattened, so as to realize the automatic closed-loop adjustment of the flattening of the foil area 13.

[0056] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A sheet foil flattening mechanism for unwinding electrode sheets, characterized in that, The device includes a tension adjusting device and a traction device. The tension adjusting device is movably positioned at the position where the traction device releases the electrode via a position adjusting device. The tension adjusting device includes a mounting base and an adjusting roller, a drive motor, and a tension sensor mounted on the mounting base. The mounting base is driven by the position adjusting device. The adjusting roller includes a roller, a expanding sleeve, a sliding sleeve, and an adjusting screw pair arranged coaxially from the inside to the outside. The inner wall of the roller is connected to the expanding sleeve. The expanding sleeve is installed in an inclined groove on the sliding sleeve. The inclined groove is arranged along the axial direction of the sliding sleeve. The sliding sleeve is connected to the nut of the adjusting screw pair. The adjusting screw pair is driven by the drive motor. The roller has a flexible roller surface that contacts the electrode. The drive motor drives the sliding sleeve to move axially via the adjusting screw pair. The sliding sleeve drives the expanding sleeve to move radially via the inclined groove, thereby changing the diameter of the roller surface. The two tension sensors are positioned on the side of the roller away from the traction device and are in contact with the foil areas on both sides of the electrode width direction. The two tension sensors detect the tension changes in the foil areas on both sides of the electrode. The position adjustment device drives the tension adjustment device to adjust its position along the electrode width direction to align the two tension sensors with the foil areas on both sides of the electrode.

2. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The two ends of the roller are connected to the mounting base through shaft heads with shaft holes. The transmission screw of the adjusting screw pair passes through the shaft holes of the two shaft heads. A first bearing is provided between the shaft head and the mounting base, a second bearing is provided between the transmission screw and the mounting base, and a third bearing is provided between the nut and the sliding sleeve of the adjusting screw pair.

3. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The expansion sleeve includes a plurality of tensioning blocks arranged along the outer circumference of the sleeve. The outer side of the tensioning block is configured as a connecting part that is fixedly connected to the roller surface, and the inner side of the tensioning block is configured as a sliding part that slides in contact with the inclined groove.

4. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The slope of the inclined groove is 2°-5°.

5. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The mounting base has a mounting plate on the outside of the roller, the tension sensor is mounted on the mounting plate, and the tension sensor is mounted on a detection roller via a bracket. The detection roller is parallel to the roller and makes rolling contact with the foil area of ​​the electrode sheet.

6. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The position adjustment device includes an actuator, and the drive end of the actuator is provided with a push plate. The push plate is connected to the mounting base through a connecting rod. The mounting base is movably mounted on the base through a guide rail. The actuator drives the mounting base to move along the guide rail through the push plate and the connecting rod.

7. The electrode foil flattening mechanism for electrode unwinding according to claim 6, characterized in that, The actuator is an electric cylinder. The drive end of the electric cylinder is pivotally connected to the push plate, and the other end of the electric cylinder is pivotally connected to a fixed seat. The fixed seat is fixed to the frame by a fixed rod.

8. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, It also includes detection sensors, which are communicatively connected to the drive motor. The two detection sensors are mounted on the side of the tension adjustment device away from the traction device via a mounting bracket. The two detection sensors detect the degree of wrinkling in the foil areas on both sides of the electrode sheet.

9. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The traction device includes a rotary motor and a hanging shaft. The rotary motor is connected to the hanging shaft via a transmission box. An electrode roll is sleeved on the hanging shaft. The rotary motor drives the hanging shaft to rotate, thereby causing the electrode roll to release the electrode sheet to the tension adjustment device.

10. The electrode foil flattening mechanism for electrode unwinding according to claim 1, characterized in that, The diameter change at the contact point between the roller surface and the coating area of ​​the electrode is greater than the diameter change at the contact point with the foil area of ​​the electrode.

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