Lithium battery pole piece coating and winding mechanism

Abstract

The utility model relates to a lithium battery pole piece coating and rolling mechanism which comprises a pressing belt traction assembly, a tension adjusting assembly and a rolling assembly, and the pressing belt traction assembly divides a belt walking path of a pole piece material belt into a coating section and a rolling section; the tension adjusting assembly is arranged on the winding section, the winding assembly comprises a winding shaft and a winding motor, the winding motor drives the winding shaft to wind the pole piece material belt into a material roll, and the tension adjusting assembly is matched with the winding motor to adjust the tension of the pole piece material belt on the winding section; a winding roller is arranged in parallel in the outer circumferential direction of the winding shaft, the winding roller is in transmission connection with a driving assembly, the driving assembly drives the winding roller to be tightly attached to the material roll in a rolling mode, and the roller face of the winding roller makes contact with the outermost layer pole piece material belt of the material roll so that the outermost layer pole piece material belt of the material roll can be tightly attached to the secondary outer layer pole piece material belt. The tension of the winding section is adjusted through the tension adjusting assembly, the winding pressing roller is tightly attached to a material roll, bubbles possibly generated in the winding process of a pole piece material belt are eliminated, and the pole piece coating and winding quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery pole piece production technical field especially relates to a kind of lithium battery pole piece coating winding mechanism. BACKGROUND

[0002] The pole piece coating equipment of lithium battery is a more complex system, after coating, drying, cooling, pole piece is wound into material roll, and the tension and speed of pole piece need to be stable in coating, drying, cooling stage, to ensure the consistency of pole piece, in winding stage, the diameter of material roll on winding shaft gradually becomes larger with continuous winding, if the driving motor of winding shaft does not increase output torque and reduce speed in real time according to winding process, the tension of pole piece will change, this tension change if backward transmission to coating, drying, cooling stage, will affect the coating quality of pole piece, when this tension change forward transmission to winding shaft, it will cause bubble between adjacent two layers of pole piece of material roll, bubble will cause the uneven surface of material roll, and cause the uneven pole piece near bubble, affect the precision and stability of subsequent pole piece processing, not only affect production efficiency and product quality, but also can cause serious influence to the performance and safety of battery. SUMMARY

[0003] In order to solve the deficiency of prior art, the utility model provides a kind of lithium battery pole piece coating winding mechanism.

[0004] The utility model provides a kind of lithium battery pole piece coating winding mechanism, including the pressure tape traction assembly, tension adjusting assembly and winding assembly that are sequentially arranged along the tape path of pole piece material belt, the pressure tape traction assembly is divided into coating section and winding section with the tape path of pole piece material belt, and the tension of pole piece material belt in coating section is different from the tension in winding section;The tension adjusting assembly is arranged in winding section, and the winding assembly includes winding shaft and winding motor, the winding motor drives winding shaft and winds pole piece material belt into material roll, and the tension adjusting assembly cooperates with winding motor and adjusts the tension of pole piece material belt in winding section.

[0005] Among them, the outer circumferential direction of winding shaft is provided with pressure roll in parallel, the pressure roll is drivenly connected with driving assembly, the driving assembly drives pressure roll to be close to material roll in the way of rolling, and the roll surface of pressure roll contacts with the outermost pole piece material belt of material roll, to close the outermost pole piece material belt of material roll to the next outer pole piece material belt.

[0006] In some embodiments, the driving assembly comprises a first driving cylinder, a second driving cylinder, a connecting rod and a connecting seat, the first driving cylinder and the second driving cylinder are both in driving connection with the pressing roller through the connecting rod, one end of the connecting rod is connected with the shaft end of the pressing roller, the other end of the connecting rod is pivotally connected with the supporting shaft of the connecting seat, a connecting block is vertically arranged on the middle part of the connecting rod close to the connecting seat, the driving end of the first driving cylinder and the driving end of the second driving cylinder are pivotally connected with the connecting block of the corresponding connecting rod, the first driving cylinder and the second driving cylinder pull the pressing roller to tightly contact the material roll through the corresponding connecting rod with the supporting shaft as the fulcrum.

[0007] In some embodiments, the first driving cylinder and the second driving cylinder are connected in parallel through the air circuit and are connected with the pressure reducing valve through the air circuit solenoid valve, the solenoid valve is a three-position five-way middle sealed solenoid valve, the pressure in the first driving cylinder and the second driving cylinder is kept unchanged through the overflow mode of the pressure reducing valve during the pressing roller tightly contacts the material roll.

[0008] In some embodiments, the tail part of the first driving cylinder and the tail part of the second driving cylinder are both connected with the mounting seat, and the tail part of the first driving cylinder and the tail part of the second driving cylinder are pivotally connected with the support on the corresponding mounting seat.

[0009] In some embodiments, the pressing roller is arranged on the side of the winding shaft away from the tension adjusting assembly.

[0010] In some embodiments, the coating section and the winding section are respectively provided with a first tension detecting roller and a second tension detecting roller, and the first tension detecting roller and the second tension detecting roller are both connected with a tension detector.

[0011] In some embodiments, the pressing belt traction assembly comprises a pressing belt rubber roller and a traction roller, the pressing belt rubber roller and the traction roller are parallel to each other, the pressing belt rubber roller and the traction roller clamp the pole piece material belt and drive the pole piece material belt to run through the traction roller.

[0012] In some embodiments, the tension adjusting assembly comprises a tension adjusting roller and a tension adjusting cylinder, both ends of the tension adjusting roller are connected with a movable seat, the movable seat is in driving connection with the tension adjusting cylinder, the pole piece material belt is arranged on the tension adjusting roller, and the tension adjusting cylinder drives the tension adjusting roller to adjust the tension of the pole piece material belt in the winding section in a swinging manner.

[0013] In some embodiments, the winding section is provided with an adjusting roller between the tension adjusting assembly and the winding shaft, both ends of the adjusting roller are connected with a moving seat, an adjusting seat is arranged on the outer side of the moving seat, an adjusting bolt and a guide rod are arranged on the adjusting seat, the adjusting bolt is in threaded connection with the moving seat, and the guide rod is in sliding connection with the moving seat, and the adjusting seat drives the moving seat and the adjusting roller to move along the guide rod through the adjusting bolt to adjust the height of the adjusting roller.

[0014] In some embodiments, a winding diameter monitor is arranged on the outer circumference of the winding shaft, and the winding diameter monitor is arranged on the side of the winding shaft away from the tension adjusting assembly.

[0015] Compared with the prior art, the lithium battery pole piece coating and winding mechanism has the following beneficial effects: the tension between the coating section and the winding section is disconnected by the tape pressing traction assembly, so that the tension change of the winding section is not transmitted to the coating section; meanwhile, the tension adjusting assembly only needs to adjust the tension of the pole piece tape in the winding section, thereby saving the energy consumption for adjusting the tension of the pole piece tape, improving the adjusting efficiency and accuracy, and eliminating the air bubbles that may be generated in the winding process of the pole piece tape by the driving assembly driving the pressing roller to tightly contact the material roll, thereby improving the quality of the pole piece coating and winding. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structural schematic view of the lithium battery pole piece coating and winding mechanism of the embodiment of the present application.

[0017] Figure 2 is a side structural schematic view of the lithium battery pole piece coating and winding mechanism of the embodiment of the present application.

[0018] Figure 3 is a perspective assembly structural schematic view of the winding assembly and the pressing roller of the embodiment of the present application.

[0019] Figure 4 is a side assembly structural schematic view of the winding assembly and the pressing roller of the embodiment of the present application.

[0020] Figure 5 is a gas path principle schematic view of the driving assembly of the embodiment of the present application.

[0021] Reference signs: 101, pole piece tape; 102, material roll; 103, coating section; 104, winding section; 105, driving roller; 106, passing roller;

[0022] 1, tape pressing traction assembly; 11, tape pressing rubber roller; 12, traction roller;

[0023] 2, tension adjusting assembly; 21, tension adjusting roller; 22, movable seat; 23, first tension detection roller; 24, second tension detection roller; 25, tension detector;

[0024] 3, winding assembly; 31, winding shaft; 32, winding motor;

[0025] 4, pressing roller;

[0026] 5, driving assembly; 51, first driving gas cylinder; 52, second driving gas cylinder; 53, connecting rod; 54, connecting seat; 55, mounting seat; 56, supporting shaft; 57, connecting block; 58, support.

[0027] 6, air path; 61, electromagnetic valve; 62, pressure reducing valve; 63, joint;

[0028] 7, adjusting roller; 71, moving seat; 72, adjusting seat; 73, adjusting bolt; 74, guide rod;

[0029] 8, roll diameter monitor. DETAILED DESCRIPTION

[0030] The specific implementation of the present application will be described with reference to the accompanying drawings.

[0031] Reference Figure 1 , the figure is a schematic diagram of the three-dimensional structure of the lithium battery pole piece coating and winding mechanism, the pole piece material belt 101 starts from the driving roller 105 on the left upper side and walks down, then passes through the first tension detection roller 23, the belt pressing and pulling assembly 1, the second tension detection roller 24, the tension adjusting assembly 2, the adjusting roller 7, the winding assembly 3 in turn, and changes the direction of the belt walking through the multiple over rollers 106, and finally winds into a material roll 102 at the winding shaft 31 of the winding assembly 3, the material roll 102 is tightly attached to the material roll 102 by the winding roller 4 on the right lower side of the material roll 102, which assists the winding of the pole piece material belt 101 and improves the quality of the winding of the pole piece material belt 101, ensuring that the pole piece material belt 101 of the material roll 102 has good flatness and tightness.

[0032] Reference Figures 1 to 5 A kind of lithium battery pole piece coating and winding mechanism, including belt pressing and pulling assembly 1, tension adjusting assembly 2 and winding assembly 3 which are sequentially arranged along the walking path of pole piece material belt 101, belt pressing and pulling assembly 1 divides the walking path of pole piece material belt 101 into coating section 103 and winding section 104, the tension of pole piece material belt 101 in coating section 103 is different from that in winding section 104;Tension adjusting assembly 2 is arranged in winding section 104, winding assembly 3 includes winding shaft 31 and winding motor 32, winding motor 32 drives winding shaft 31 to wind pole piece material belt 101 into material roll 102, tension adjusting assembly 2 cooperates with winding motor 32 to adjust the tension of pole piece material belt 101 in winding section 104.

[0033] Among them, winding shaft 31 is provided with winding roller 4 parallel in the circumferential direction, winding roller 4 is drivingly connected with driving assembly 5, driving assembly 5 drives winding roller 4 to tightly contact material roll 102 in the form of rolling, the roller surface of winding roller 4 contacts the outermost pole piece material belt 101 of material roll 102, so as to tightly contact the outermost pole piece material belt 101 of material roll 102 to the next outer pole piece material belt 101.

[0034] The lithium battery pole piece coating and winding mechanism of the application avoids the transmission of tension changes of the winding section 104 to the coating section 103 by separating the tension of the pole piece material strip 101 in the coating section 103 and the winding section 104 through the pressure strip traction assembly 1, at the same time, the tension adjusting assembly 2 only needs to adjust the tension of the pole piece material strip 101 in the winding section 104, saving the energy consumption for adjusting the tension of the pole piece material strip 101, improving the adjustment efficiency and accuracy, and eliminating the bubbles that may be generated in the winding process of the pole piece material strip 101 by driving the pressure winding roller 4 to tightly adhere to the material roll 102, improving the quality of the pole piece material strip 101.

[0035] In order to drive the pressure winding roller 4, in the embodiment, referring to Figures 1 to 4 , the driving assembly 5 includes a first driving cylinder 51, a second driving cylinder 52, a connecting rod 53 and a connecting seat 54, the first driving cylinder 51 and the second driving cylinder 52 are both drivingly connected with the pressure winding roller 4 through the connecting rod 53, one end of the connecting rod 53 is connected with the shaft end of the pressure winding roller 4, the other end of the connecting rod 53 is pivoted with the supporting shaft 56 of the connecting seat 54, a connecting block 57 is vertically arranged at the middle of the connecting rod 53 close to the connecting seat 54, the driving end of the first driving cylinder 51 and the driving end of the second driving cylinder 52 are pivoted with the connecting block 57 of the corresponding connecting rod 53, the first driving cylinder 51 and the second driving cylinder 52 pull the pressure winding roller 4 to tightly adhere to the material roll 102 through the corresponding connecting rod 53 with the supporting shaft 56 as the fulcrum.

[0036] It can be understood that in this way, the first driving cylinder 51 and the second driving cylinder 52 synchronously drive the pressure winding roller 4 through the respective connecting rods 53, and pry the pressure winding roller 4 through the lever principle of the connecting rod 53, so that the pressure winding roller 4 can tightly adhere to the surface of the material roll 102, thereby tightly pressing the pole piece material strip 101 on the material roll 102, and the pressure winding roller 4 follows the material roll 102 to roll by relying on the friction force, thereby eliminating the bubbles that may be generated in the winding process of the pole piece material strip 101.

[0037] In order to enable the pressure winding roller 4 to tightly adhere to the material roll 102 with constant pressure, in the embodiment, referring to Figure 5 , the first driving cylinder 51 and the second driving cylinder 52 are connected in parallel through the gas circuit 6, and are connected with the electromagnetic valve 61 and the pressure reducing valve 62 through the gas circuit 6, the electromagnetic valve 61 is a three-position five-way middle sealed electromagnetic valve 61, and the pressure in the first driving cylinder 51 and the second driving cylinder 52 is kept unchanged by the overflow mode of the pressure reducing valve 62 during the process that the pressure winding roller 4 tightly adheres to the material roll 102.

[0038] It can be understood that, in this way, the gas path 6 is connected with the electromagnetic valve 61 and the pressure reducing valve 62 through the joint 63, the electromagnetic valve 61 is connected with a gas source, the gas supply of the gas source passes through the control of the electromagnetic valve 61, and then passes through the gas path 6 and the joint 63 to make the first driving air cylinder 51 and the second driving air cylinder 52 contract, so as to drive the winding roller 4 to press the material roll 102; the electromagnetic valve 61 adopts a three-position five-way middle sealing type, when the winding roller 4 presses the material roll 102, the electromagnetic valve 61 returns to the position, the front cavity and the rear cavity of the first driving air cylinder 51 and the second driving air cylinder 52 are stable and unchanged, at the same time, the electromagnetic valve 61 closes the air inlet and the air outlet, so that the gas in the first driving air cylinder 51 and the second driving air cylinder 52 is sealed, with the gradual increase of the roll diameter of the material roll 102, the piston rod of the first driving air cylinder 51 and the second driving air cylinder 52 is gradually elongated, the pressure on the compressed cylinder side of the first driving air cylinder 51 and the second driving air cylinder 52 should be gradually increased, but due to the overflow effect of the pressure reducing valve 62, the pressure on the compressed cylinder side of the first driving air cylinder 51 and the second driving air cylinder 52 is kept constant, so that the pressure of the material roll 102 pressed by the winding roller 4 is also constant, and in this process, the constant cylinder pressure of the first driving air cylinder 51 and the second driving air cylinder 52 is self-adaptive control, without the need of PLC control of the coating equipment, so that the reliability is high and the energy consumption is low.

[0039] In order to make the first driving air cylinder 51 and the second driving air cylinder 52 better link with the connecting rod 53, in the embodiment, the first driving air cylinder 51 and the second driving air cylinder 52 are connected with the mounting seat 55 at the tail, and the tail of the first driving air cylinder 51 and the second driving air cylinder 52 is pivoted with the support 58 on the corresponding mounting seat 55. Figure 3

[0040] It can be understood that, in this way, the first driving air cylinder 51 and the second driving air cylinder 52 and the corresponding connecting rod 53 are movable, and the fixed parts are the mounting seat 55 and the connecting seat 54, the first driving air cylinder 51 and the second driving air cylinder 52 rotate around the support 58 of the mounting seat 55, the connecting rod 53 rotates around the support shaft 56 of the connecting seat 54, and the piston rod of the first driving air cylinder 51 and the second driving air cylinder 52 rotates around the connecting block 57 between the piston rod and the connecting rod 53, so that the first driving air cylinder 51 and the second driving air cylinder 52 can stably pry the winding roller 4 through the connecting rod 53.

[0041] In order to avoid affecting the tension adjustment of the winding section 104, in the embodiment, the winding roller 4 is arranged on the side of the winding shaft 31 away from the tension adjustment assembly 2. Figure 1

[0042] It can be understood that, in this way, the winding roller 4 only contacts the outermost pole piece material belt 101 wound on the material roll 102, and does not contact the pole piece material belt 101 not wound on the material roll 102, so as to avoid affecting the tension adjustment of the winding section 104.​​

[0043] In order to detect the tension of the pole piece material belt 101, in the embodiment, referring to Figure 1 and Figure 2 , the coating section 103 and the winding section 104 are respectively provided with a first tension detection roller 23 and a second tension detection roller 24, and the first tension detection roller 23 and the second tension detection roller 24 are both connected with a tension detector 25.

[0044] It can be understood that, in this way, the first tension detection roller 23 and the second tension detection roller 24 respectively detect the tension of the coating section 103 and the winding section 104, and the tension value is monitored in real time through the respective tension detector 25. The tension detector 25 adopts an Erhardt Leimer tension detection sensor, which determines the tension by measuring the force generated by the tension detection roller when it is stretched or compressed by the pole piece material belt 101. The tension detector 25 sends the detected tension value of the pole piece material belt 101 to the coating equipment PLC in real time, and the PLC controls the amplitude of the swing of the tension adjusting roller 21 driven by the tension adjusting cylinder to control the tension of the pole piece material belt 101.

[0045] In order to isolate the tension of the pole piece material belt 101 in the coating section 103 and the winding section 104, in the embodiment, referring to Figure 1 and Figure 2 , the pressure belt traction assembly 1 includes a pressure belt rubber roller 11 and a traction roller 12, the pressure belt rubber roller 11 and the traction roller 12 are parallel to each other, the pressure belt rubber roller 11 and the traction roller 12 clamp the pole piece material belt 101, and the traction roller 12 drives the pole piece material belt 101 to run.

[0046] It can be understood that, in this way, the pressure belt rubber roller 11 and the traction roller 12 are tightly attached together to clamp the pole piece material belt 101, isolate the tension of the coating section 103 and the winding section 104, so that the tension adjusting assembly 2 only needs to adjust the tension of the pole piece material belt 101 in the winding section 104 with a shorter length, saving the energy consumption for adjusting the tension of the pole piece material belt 101, improving the adjustment efficiency and accuracy, and making the tension adjustment accuracy of the pole piece material belt 101 in the winding section 104 reach ±0.2N, which can well meet the production demand.

[0047] In order to, in the embodiment, referring to Figure 1 and Figure 2 , the tension adjusting assembly 2 includes a tension adjusting roller 21 and a tension adjusting cylinder (not shown in the figure), both ends of the tension adjusting roller 21 are connected with a movable seat 22, the movable seat 22 is in transmission connection with the tension adjusting cylinder, the pole piece material belt 101 is wound on the tension adjusting roller 21, and the tension adjusting cylinder drives the tension adjusting roller 21 to adjust the tension of the pole piece material belt 101 in the winding section 104 in a swinging manner.

[0048] It can be understood that, in this way, the two ends of the tension adjusting roller 21 are connected with the tension adjusting cylinders, and the two tension adjusting cylinders drive the tension adjusting roller 21 to swing through the swing arms. In the swinging process, the tension adjusting roller 21 will loosen or tighten the pole piece material belt 101, and the swinging range is determined by the tension value of the pole piece material belt 101 monitored by the tension detector 25, so as to realize the constant tension of the pole piece material belt 101 of the material winding roll 102.

[0049] In order to fine-tune the path of the pole piece material belt 101 between the winding section 104 and the winding shaft 31, in the embodiment, referring to Figure 1 and Figure 2 , the winding section 104 is provided with an adjusting roller 7 between the tension adjusting assembly 2 and the winding shaft 31. The two ends of the adjusting roller 7 are connected with a moving seat 71, the outer side of the moving seat 71 is provided with an adjusting seat 72, the adjusting seat 72 is provided with an adjusting bolt 73 and a guide rod 74, the adjusting bolt 73 is threadedly connected with the moving seat 71, and the guide rod 74 is slidably connected with the moving seat 71. The adjusting seat 72 drives the moving seat 71 and the adjusting roller 7 to move along the guide rod 74 through the adjusting bolt 73, so as to adjust the height of the adjusting roller 7.

[0050] It can be understood that, in this way, the height of the pole piece material belt 101 is adjusted through the adjusting roller 7, so that the pole piece material belt 101 can be pulled to the winding shaft 31 at a smaller angle, and the problem of air bubbles generated on the material roll 102 is reduced. The moving seat 71 is driven to move along the guide rod 74 by screwing the adjusting bolt 73, and the moving seat 71 and the adjusting roller 7 are stably guided by the two guide rods 74, so as to ensure the stability of the adjusting roller 7.

[0051] In order to further improve the tension adjusting capability, in the embodiment, referring to Figure 1 and Figure 2 , the winding shaft 31 is provided with a roll diameter monitor 8 in the outer circumferential direction, and the roll diameter monitor 8 is arranged on the side of the winding shaft 31 away from the tension adjusting assembly 2.

[0052] It can be understood that, in this way, the servo motor adopted by the winding motor 32 has controllability and high control precision. The encoder inside the winding motor 32 monitors the rotation speed of the winding roller and the material roll 102 in real time, the roll diameter monitor 8 can detect the roll diameter of the material roll 102 in real time, and sends the information of the roll diameter to the PLC of the coating equipment. Through logical judgment, the rotation speed and the torque output by the winding motor 32 are controlled, the real-time matching of the roll diameter and the rotation speed is realized, the torque transmitted to the pole piece material belt 101 by the winding motor 32 tends to be constant, and when the torque fluctuates, it will be reflected in the tension of the pole piece material belt 101 in real time. The tension of the pole piece material belt 101 in the winding section 104 is adjusted in time through the tension adjusting assembly 2, so that the tension of the pole piece material belt 101 remains stable.

[0053] The application embodiment monitors the roll diameter of the roll 102 in real time through the roll diameter detector, matches the torque and rotating speed output by the winding motor 32 with the roll diameter of the roll 102, clamps the pole piece material belt 101 through the compression belt rubber roller 11 and the traction roller 12 of the compression belt traction assembly 1, and cuts off the tension between the coating section 103 and the winding section 104, so that the tension adjusting assembly 2 only needs to adjust the tension of the short length pole piece material belt 101 in the winding section 104, saves the energy consumption for adjusting the tension of the pole piece material belt 101, and improves the adjusting efficiency and accuracy; the compression roll 4 is always pressed against the roll 102 through the first driving cylinder 51 and the second driving cylinder 52, the compression roll 4 rolls following the roll 102 by relying on the friction force, and the air bubbles generated in the winding process of the pole piece material belt 101 can be eliminated, and the quality of the pole piece coating and winding is improved.

[0054] The above is not any limitation on the technical range of the application, and any modification, equivalent change and modification made to the above embodiments according to the technical essence of the application still belong to the range of the technical scheme of the application.

Claims

1. A lithium battery pole piece coating and winding mechanism, characterized in that, The pressure tape traction assembly, the tension adjusting assembly and the winding assembly are arranged along the tape path of the pole piece tape strip in sequence, the pressure tape traction assembly divides the tape path of the pole piece tape strip into a coating section and a winding section, the tension of the pole piece tape strip in the coating section is different from the tension in the winding section, the tension adjusting assembly is arranged in the winding section, the winding assembly comprises a winding shaft and a winding motor, the winding motor drives the winding shaft to wind the pole piece tape strip into a tape roll, the tension adjusting assembly cooperates with the winding motor to adjust the tension of the pole piece tape strip in the winding section. A pressure roll is arranged in parallel with the outer circumferential direction of the winding shaft, the pressure roll is drivingly connected with a driving assembly, the driving assembly drives the pressure roll to tightly press the tape roll in a rolling manner, the roll surface of the pressure roll is in contact with the outermost pole piece tape strip of the tape roll to tightly press the outermost pole piece tape strip of the tape roll to the next outermost pole piece tape strip.

2. The lithium battery pole piece coating and winding mechanism according to claim 1, characterized in that, The driving assembly comprises a first driving cylinder, a second driving cylinder, a connecting rod and a connecting seat, the first driving cylinder and the second driving cylinder are both drivingly connected with the pressure roll through the connecting rod, one end of the connecting rod is connected with the shaft end of the pressure roll, the other end of the connecting rod is pivotally connected with the supporting shaft of the connecting seat, a connecting block is vertically arranged at the position of the connecting rod close to the connecting seat, the driving end of the first driving cylinder and the driving end of the second driving cylinder are pivotally connected with the connecting block of the corresponding connecting rod, the first driving cylinder and the second driving cylinder pull the pressure roll to tightly press the tape roll through the corresponding connecting rod with the supporting shaft as the fulcrum.

3. The lithium battery pole piece coating and winding mechanism according to claim 2, characterized in that, The first driving cylinder and the second driving cylinder are connected in parallel through the gas circuit and are connected with the pressure reducing valve through the gas circuit solenoid valve, the solenoid valve is a three-position five-way middle-seal solenoid valve, the pressure in the first driving cylinder and the second driving cylinder remains unchanged through the overflow mode of the pressure reducing valve during the process that the pressure roll tightly presses the tape roll.

4. The lithium battery pole piece coating and winding mechanism according to claim 2, characterized in that, The tail of the first driving cylinder and the tail of the second driving cylinder are both connected with the mounting seat, the tail of the first driving cylinder and the tail of the second driving cylinder are pivotally connected with the bracket on the corresponding mounting seat.

5. The lithium battery pole piece coating and winding mechanism according to claim 1, characterized in that, The pressure roll is arranged on the side of the winding shaft away from the tension adjusting assembly.

6. The lithium battery pole piece coating and winding mechanism according to claim 1, characterized in that, The coating section and the winding section are respectively provided with a first tension detecting roller and a second tension detecting roller, the first tension detecting roller and the second tension detecting roller are both connected with a tension detector.

7. The lithium battery pole piece coating and winding mechanism according to claim 1, characterized in that, The pressure tape traction assembly comprises a pressure tape rubber roller and a traction roller, the pressure tape rubber roller and the traction roller are parallel to each other, the pressure tape rubber roller and the traction roller clamp the pole piece tape strip and drive the pole piece tape strip to run through the traction roller.

8. The lithium battery pole piece coating and winding mechanism of claim 1, wherein, The tension adjusting assembly comprises a tension adjusting roller and a tension adjusting cylinder, the two ends of the tension adjusting roller are connected with movable seats, the movable seats are drivingly connected with the tension adjusting cylinder, the pole piece tape strip is arranged around the tension adjusting roller, the tension adjusting cylinder drives the tension adjusting roller to adjust the tension of the pole piece tape strip in the winding section in a swinging manner.

9. The lithium battery pole piece coating and winding mechanism of claim 1, wherein, The winding section is provided with an adjusting roller between the tension adjusting assembly and the winding shaft, two ends of the adjusting roller are connected with a moving seat, an adjusting seat is arranged outside the moving seat, an adjusting bolt and a guide rod are arranged on the adjusting seat, the adjusting bolt is in threaded connection with the moving seat, the guide rod is in sliding connection with the moving seat, and the adjusting seat drives the moving seat and the adjusting roller to move along the guide rod through the adjusting bolt, so that the height of the adjusting roller is adjusted.

10. The lithium battery pole piece coating and winding mechanism of claim 1, wherein, A roll diameter monitor is arranged in the outer circumferential direction of the winding shaft, and the roll diameter monitor is arranged on the side, away from the tension adjusting assembly, of the winding shaft.

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