Lithium battery automatic winding machine and intelligent winding control method thereof

Abstract

The present application relates to the field of winding machine lithium battery automatic winding machine and its intelligent winding control method, including installation panel, installation panel is provided with first diaphragm unwinding mechanism and second diaphragm unwinding mechanism for conveying diaphragm, and installation panel is provided with first pole piece unwinding mechanism and second pole piece unwinding mechanism for conveying pole piece, and installation panel is provided with winding mechanism for winding diaphragm and pole piece, the installation panel is provided with the pre-winding correction mechanism for the pole piece and diaphragm, the heating gas pipe for heating diaphragm and pole piece is arranged on the pre-winding support seat, the present application is accurately centered by pre-winding correction mechanism Diaphragm and pole piece are attached, further reduce the displacement of unwinding transmission process, at the same time, by heating diaphragm and pole piece, it is helpful to improve the softness and ductility of pole piece and diaphragm Adhesion, improve the close fit of diaphragm and pole piece winding, improve production efficiency and quality.

Description

Technical Field

[0001] The present invention relates to the field of winding machines, and in particular to an automatic winding machine for lithium batteries and an intelligent winding control method thereof. Background Art

[0002] Lithium batteries, as the core of modern energy storage technology, have a wide range of applications, including but not limited to new energy vehicles, portable electronic products and equipment, energy storage systems, and other fields. As key equipment in lithium battery production, lithium battery automatic winding machines have a wide range of applications and are becoming increasingly important. During the lithium battery production process, winding machines have the important task of winding positive and negative electrode sheets, separators, and other materials into lithium battery cells in a specific order. This process directly determines the structural quality of the cell and the overall performance of the battery. Therefore, lithium battery winding machines occupy a pivotal position in the lithium battery industry chain.

[0003] Existing winding machines primarily consist of a frame, winding shaft, tension control system, and transmission system. They operate by rotating the winding shaft to wind the positive and negative electrode sheets and separator into battery cells according to a specific order and tension requirements. The tension control system adjusts the material tension to ensure stability and uniformity during the winding process. The transmission system transmits power through a motor, reducer, and other devices to drive the winding shaft. Furthermore, the winding machine is equipped with various sensors and detection devices to monitor various parameters during the winding process in real time to ensure winding quality.

[0004] However, although the existing lithium battery winding machines are relatively complete in structure and function, there are still some significant defects in actual applications. First, during the winding process, due to factors such as material tension fluctuations and equipment vibrations, the centering accuracy of the positive and negative electrodes and the diaphragm when entering the winding mechanism is difficult to ensure, resulting in uneven internal structure of the battery cell made by winding the diaphragm and the electrode, affecting the performance and safety of the battery cell. Secondly, during the winding process, if the tension is improperly controlled, it may cause the electrode to bend and deform, and the existing electrode will be repeatedly stretched and bent during the transmission and transportation process. The transmission electrode and diaphragm of the transmission mechanism will generate internal stress, making the stress uneven during the winding process, affecting the winding effect of the diaphragm and the electrode, and the existing winding machine has a poor tight fitting effect on the winding of the electrode and diaphragm, making it difficult to stably wind the electrode and diaphragm, affecting the production efficiency and production quality of the automatic winding machine.

[0005] The winding process of the lithium battery automatic winding machine mainly includes the following steps: first, the positive and negative electrode sheets, diaphragms and other raw materials are dusted and inspected, and then sent to the winding mechanism through the corresponding unwinding mechanism. Secondly, the positive and negative electrode sheets and diaphragms are arranged in the order of diaphragm-positive electrode sheet-diaphragm-negative electrode sheet through the winding mechanism and wound to form a battery cell structure. Then, the electrode sheets and diaphragms are precisely cut through the cutting mechanism. Finally, the tail ends of the battery cell electrode sheets and diaphragms are bonded using the gluing mechanism to complete the manufacture of the battery cell.

[0006] In the existing winding method of the lithium battery winding machine, the conveying of the electrode and the diaphragm is generally provided with a correction and detection mechanism to perform the correction action, and then directly enters the winding mechanism to wind the battery cell. The winding and bonding effect of the battery cell still has certain defects, and it is not easy to make the electrode and the diaphragm fit tightly, which affects the stable winding of the electrode and the diaphragm in the winding mechanism. In addition, the existing electrode and the diaphragm will be subjected to certain stretching and bending during the transmission through the conveying mechanism, and generate internal stress, which affects the winding effect of the electrode and the diaphragm, and is not conducive to the automatic winding and production of the lithium battery winding machine. Summary of the Invention

[0007] The purpose of the present invention is to solve the above defects and provide a lithium battery automatic winding machine and an intelligent winding control method thereof, so as to solve the technical problem that the tight fitting effect of the electrode and the diaphragm in the above background technology is poor, making it difficult to accurately and stably wind the electrode and the diaphragm, affecting the production efficiency and production quality of the automatic winding machine battery cell winding.

[0008] The object of the present invention is achieved in the following ways:

[0009] The automatic winding machine for lithium batteries includes a mounting panel, a first diaphragm unwinding mechanism and a second diaphragm unwinding mechanism for conveying the diaphragm, a first pole piece unwinding mechanism and a second pole piece unwinding mechanism for conveying the pole piece, and a winding mechanism for winding the diaphragm and the pole piece is provided on the mounting panel, and a winding correction mechanism for pre-winding the pole piece and the diaphragm is provided on the mounting panel, and the winding correction mechanism includes a winding support seat, a winding correction cylinder, and two winding correction mechanisms. Roller and two in-roll deflection correction sensors, the two in-roll deflection correction rollers are symmetrically installed on both sides of the in-roll support seat, so that they are used to correct the deflection of the in-roll pole piece, the telescopic end of the in-roll deflection correction cylinder extends to one end of the in-roll deflection correction roller, and the telescopic end of the in-roll deflection correction cylinder is provided with a deflection correction bracket for installing the in-roll deflection correction sensor, the two in-roll deflection correction sensors are symmetrically distributed on one end of the two in-roll deflection correction rollers, so that the in-roll deflection correction sensor can detect the position of the pole piece after passing through the in-roll deflection correction roller and correcting the winding under the drive of the in-roll deflection correction cylinder;

[0010] The winding support seat is provided with a heating air pipe for heating the diaphragm and the electrode piece. One end of the heating air pipe passes through the winding support seat and is used to introduce external heating gas through the installation valve. The heating air pipe is provided with a plurality of conductive air outlet holes, which extend toward the outer surface of the electrode piece, so that the heating air pipe passes through the air outlet holes to heat the electrode piece and the diaphragm passing through the winding correction mechanism.

[0011] The first diaphragm unwinding mechanism and the second diaphragm unwinding mechanism are used to introduce the two diaphragms into the pre-wound winding correction mechanism respectively along the unwinding conveying direction, and the first electrode sheet unwinding mechanism and the second electrode sheet unwinding mechanism are used to introduce the positive and negative electrode sheets into the pre-wound winding correction mechanism respectively along the unwinding conveying direction, so that the winding correction mechanism is used to calibrate the two diaphragms and the positive and negative electrode sheets and then transport them into the winding mechanism for winding;

[0012] The unwinding and conveying directions of the first electrode unwinding mechanism and the second electrode unwinding mechanism are provided with a clamping and feeding mechanism for clamping and conveying the electrode, and a electrode cutting mechanism for cutting the electrode is provided between the clamping and feeding mechanism and the winding correction mechanism, so that the winding mechanism winds the electrode to a set length, clamps it by the clamping and feeding mechanism, cuts it by the electrode cutting mechanism, and is reeled up by the winding mechanism, and a diaphragm cutting mechanism for cutting the diaphragm wound to a set length is provided on the installation panel, and a gluing mechanism is used on the installation panel to finish gluing the diaphragm and the electrode to form a battery cell, so that the battery cell is unloaded by the unloading mechanism after gluing.

[0013] Further in the above description, a powder brushing component, a measuring component and a correcting component are distributed in the direction of conveying the first pole piece unwinding mechanism and the second pole piece unwinding mechanism toward the winding mechanism, and are used to brush powder, measure and correct the pole pieces respectively. The powder brushing component includes a brush and a dust box. The dust box is installed on the installation panel, and the brush is arranged in the dust box. The outer surface of the brush is pressed and contacted with the outer surface of the pole piece, so that the pole piece is brushed and dusted along the outer surface of the brush during transportation.

[0014] Further in the above description, the heating air pipe is connected to the air inlet pipe through an installation valve, one end of the air inlet pipe is connected to the heating box, and an electric heating wire for heating the gas is provided in the heating box. The heated air is evenly sent into the heating air pipe through a heat-conducting blower in the heating box to heat the electrode and the diaphragm.

[0015] Further in the above description, the entry support seat is provided with an entry guide roller for introducing the electrode for transportation. There are two entry guide rollers, and the two entry guide rollers are symmetrically distributed on both sides of the entry support seat, so that the two entry guide rollers are used to press the electrode for transportation.

[0016] Further in the above description, the clamping and feeding mechanism comprises a feeding clamping support, a feeding clamping upper roller support, a feeding clamping lower roller support and two feeding plates, the feeding clamping support is connected to the mounting panel through a moving rod, the feeding clamping upper roller support is installed on the feeding clamping support, the feeding clamping lower roller support is installed on the feeding clamping support through a driving cylinder, the driving cylinder is connected to the feeding clamping lower roller support through the extension end, and the feeding clamping lower roller support can be driven to move towards the feeding clamping upper roller support, the feeding clamping upper roller support and the feeding clamping lower roller support form a clamping gap for clamping the pole piece, and the two feeding plates are installed on the feeding clamping support close to one end of the pole piece cutting mechanism.

[0017] Further in the above description, the mounting panel is provided with a first pressing mechanism and a second pressing mechanism for pressing and tensioning the pole piece and the diaphragm, the first pressing mechanism and the second pressing mechanism are distributed on both sides of the winding correction mechanism, the first pressing mechanism and the second pressing mechanism each comprise a mounting base, a feeding pressure roller, a tensioning roller and a pressing roller, the pressing cylinder is connected to the mounting base through a moving piece, the extension end of the pressing cylinder extends towards the winding correction mechanism and is connected to the pressing roller, the tensioning cylinder is provided on the moving piece, the extension end of the tensioning cylinder extends obliquely towards the winding correction mechanism and is connected to the tensioning roller, the feeding guide seat is connected to the moving piece through a connecting plate, the low-pressure plate is connected to the feeding guide seat through a guide rod, the pressing part is formed at the end of the pressing plate extending towards the winding correction mechanism, the feeding pressure roller is installed at the end of the pressing plate close to the winding correction mechanism, so that when the moving piece is driven to move towards the winding correction mechanism by the pressing cylinder, the feeding pressure roller, the tensioning roller and the pressing roller move towards the winding correction mechanism and press the corresponding diaphragm and pole piece.

[0018] Further in the above description, the inside of the pressing plate is formed with a cavity, and the side surface of the pressing plate is connected to a cooling assembly through a connecting valve, the cooling assembly comprises a cooling box, a cooling pipeline and a cooling fan, one end of the cooling pipeline is in communication with the connecting valve, and the other end of the cooling pipeline is in communication with the cooling box, so that the cooling fan is installed in the cooling box, and the cooling hole in communication with the cavity is provided on the pressing plate, the cooling hole extends in communication with the winding correction mechanism through the pressing part.

[0019] The intelligent winding method of the automatic winding machine for lithium batteries comprises the following steps:

[0020] Step one: winding the diaphragm and the pole piece by using the automatic winding machine for lithium batteries;

[0021] Step two: unwinding, controlling the unwinding of the diaphragm and the pole piece through the diaphragm unwinding module and the pole piece unwinding module of the controller, the first diaphragm unwinding mechanism and the second diaphragm unwinding mechanism pass the two diaphragms through the ultrasonic detection mechanism in the unwinding conveying direction for detection, so as to respectively enter the pre-rolling into the rolling correction mechanism, the first pole piece unwinding mechanism and the second pole piece unwinding mechanism are used to convey the positive and negative pole pieces to the into rolling correction mechanism respectively, the positive and negative pole pieces pass through the powder brushing assembly, the measuring assembly and the correction assembly in turn for powder brushing, dust removal, length measurement and correction action, and are conveyed to the clamping and feeding mechanism, and then pass through the pole piece cutting mechanism to enter the into rolling correction mechanism of the pre-rolling through the clamping and feeding of the clamping and feeding mechanism.

[0022] Step three: heating, the heating module of the controller controls the power heating of the heating wire in the heating box, and the heated hot air is conveyed to the heating air pipe through the air inlet pipe using the heat conduction fan, and the diaphragm and the pole piece passing through the into rolling correction mechanism are heated and treated through the air outlet hole on the heating air pipe.

[0023] Step four: into rolling correction, the into rolling correction mechanism is controlled by the into rolling correction module of the controller to guide the diaphragm, the positive pole piece, the diaphragm and the negative pole piece into rolling, when the diaphragm and the pole piece are rolled to the set length, the pole piece cutting mechanism cuts the pole piece of the set length, the into rolling correction rollers correct the positive pole piece and the negative pole piece respectively, the into rolling correction sensor on the into rolling correction bracket is driven by the into rolling correction cylinder to correct the corrected positive pole piece and negative pole piece, and the diaphragm and the pole piece are pressed by the first pressing mechanism and the second pressing mechanism, so that the diaphragm, the positive pole piece, the diaphragm and the negative pole piece form accurate fitting before passing through the into rolling correction mechanism into the winding mechanism, and the diaphragm and the pole piece are cooled through the cooling holes on the pressing plate;

[0024] Step five: winding, the winding module of the controller controls the winding mechanism to wind the diaphragm, the positive pole piece, the diaphragm and the negative pole piece after the into rolling correction, and the diaphragm cutting mechanism is used to cut the wound diaphragm;

[0025] Step six: gluing, the gluing module of the controller controls the gluing mechanism to glue and bond the diaphragm and the pole piece, so that the two diaphragms and the positive and negative pole pieces are wound to form a lithium battery cell product;

[0026] Step seven: discharging, the discharging module of the controller controls the discharging mechanism to discharge the wound cell product.

[0027] Further in the above description, in step three, a temperature sensor for monitoring the temperature of the winding area in real time is installed in the heating box, and a cooling fan for cooling is arranged in the heating box. The temperature of the hot air in the heating box is 70-85°C, so that the pole piece and the diaphragm are bonded.

[0028] Further in the above description, in step four, the sheet feeding pressure roller, the tension roller and the pressure roller on the first pressure mechanism and the second pressure mechanism extend to the roll-in correction mechanism to abut the diaphragm and the pole piece.

[0029] Advantages of the present application:

[0030] 1. By setting the first and second diaphragm unwinding mechanisms and the first and second pole piece unwinding mechanisms, the diaphragm and the pole piece are synchronously and stably supplied to ensure the continuity and stability of the production process. After the diaphragm and the pole piece are conveyed to the roll-in correction mechanism, the two roll-in correction rollers of the roll-in correction mechanism can accurately correct the deviation of the pole piece entering the roll-in correction mechanism, and the roll-in correction sensor on the roll-in correction bracket can correct the pole piece on the two roll-in correction rollers, and accurately guide and correct the diaphragm. Under the pressure of the first and second pole piece unwinding mechanisms, the diaphragm and the pole piece are accurately centered and laminated, further reducing the displacement in the unwinding and conveying process, thereby effectively reducing the deviation of the diaphragm and the pole piece in the winding process, improving the winding accuracy and the consistency of the battery quality. The pole piece and the diaphragm are heated through the air outlet, further releasing the internal stress in the unwinding and conveying process of the diaphragm and the pole piece, thereby reducing the internal stress caused by stretching and bending in the unwinding process. At the same time, heating the diaphragm and the pole piece helps to improve the softness and ductility of the diaphragm and the pole piece, making the winding process after entering the winding mechanism more smooth, improving the close lamination of the diaphragm and the pole piece, and improving the production efficiency and quality.

[0031] 2. In the intelligent winding method of the lithium battery, the heating module is used to control the heating process in step three. The hot air generated by the electric heating wire is delivered to the heating air pipe through the heat conduction fan. The diaphragm and the pole piece are heated to release the internal stress uniformly in the unwinding and conveying process, thereby reducing the internal stress caused by stretching and bending in the unwinding process. The air outlet on the heating air pipe allows hot air to directly act on the surface of the diaphragm and the pole piece, thereby uniformly heating the diaphragm and the pole piece. At the same time, the flexibility and adhesion of the material are improved, which is beneficial to the subsequent winding and lamination process. The roll-in correction mechanism in step four is controlled by the roll-in correction module to ensure that the diaphragm and the pole piece are accurately wound according to the predetermined path. The roll-in correction rollers correct the deviation of the pole piece entering the roll-in correction mechanism, and the roll-in correction sensor accurately corrects the pole piece. This further improves the winding accuracy and consistency, reduces the deviation of the pole piece and the diaphragm entering the winding mechanism, and ensures the close lamination between the diaphragm and the pole piece, thereby accurately and stably conveying to the winding mechanism for subsequent winding action, improving the production quality. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a perspective view of the overall structure of the present embodiment.

[0033] Figure 2 It is a partial structural plan view of this embodiment;

[0034] Figure 3 It is a partial structural perspective diagram of this embodiment;

[0035] Figure 4 Schematic diagram of the connection structure of the heating gas pipe in this embodiment;

[0036] Figure 5 Schematic diagram of the structure of the roll-in correction mechanism in this embodiment;

[0037] Figure 6 Schematic diagram of the structure of the clamping and feeding mechanism in this embodiment;

[0038] Figure 7 Schematic diagram of the structure of the first pressing mechanism and the second pressing mechanism in this embodiment;

[0039] Figure 8 2 is a bottom view schematic diagram of the first pressing mechanism and the second pressing mechanism in this embodiment;

[0040] Figure 9 Schematic plan view of the first pressing mechanism and the second pressing mechanism in this embodiment;

[0041] Figure 10 Schematic diagram of the winding method in this embodiment;

[0042] The reference numerals in the figure are: 1-installation panel, 2-first diaphragm unwinding mechanism, 3-second diaphragm unwinding mechanism, 4-first pole piece unwinding mechanism, 5-second pole piece unwinding mechanism, 6-winding mechanism, 7-heating air pipe, 8-installation valve, 9-air outlet, 10-pole piece cutting mechanism, 11-diaphragm cutting mechanism, 12-unloading mechanism, 13-powder brushing assembly, 14-measuring assembly, 15-correction assembly; 100-reeling correction mechanism, 101-reeling support seat, 102-reeling correction cylinder, 103-reeling correction roller, 104-reeling correction sensor, 105-correction bracket, 106-feed guide roller; 200-clamping and feeding mechanism, 201-feeding clamping support, 202-feeding clamp upper roller seat, 203-feeding clamp lower roller seat, 204-feeding plate, 205-driving cylinder;

[0043] 300a-first pressing mechanism, 300b-second pressing mechanism, 301-mounting base, 302-sheet feeding pressure roller, 303-tensioning roller, 304-pressing roller, 305-pressing cylinder, 306-tensioning cylinder, 307-connecting plate, 308-sheet feeding guide seat, 309-low pressure plate, 310-pressing part, 311-connecting valve. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] In this embodiment, refer to Figures 1-10 The specific implementation of the lithium battery automatic winding machine includes an installation panel 1, on which a first diaphragm unwinding mechanism 2 and a second diaphragm unwinding mechanism 3 for conveying the diaphragm are provided, and a first electrode unwinding mechanism 4 and a second electrode unwinding mechanism 5 for conveying the electrode are provided on the installation panel 1, and a winding mechanism 6 for winding the diaphragm and the electrode is provided on the installation panel 1. The specific structure and operation principle of the unwinding of the electrode and the diaphragm and the subsequent winding are well-known technologies that those skilled in the art should know, so they will not be repeated here.

[0046] Reference Figure 2 and Figure 3 In the direction in which the first electrode unwinding mechanism 4 and the second electrode unwinding mechanism 5 are conveyed toward the winding mechanism 6, there are distributed a powder brushing component 13, a measuring component 14 and a correcting component 15 for respectively brushing powder, measuring and correcting the electrode. The powder brushing component 13 includes a brush and a dust box. The dust box is installed on the installation panel 1. The brush is arranged in the dust box, and the outer surface of the brush is pressed against the outer surface of the electrode, so that the electrode is brushed with powder and dusted along the outer surface of the brush during transportation.

[0047] Specifically, after the electrode is unwound, it is powdered, measured and corrected to further ensure the quality of the electrode unwinding. Its specific structure and operating principle are well-known technologies that those skilled in the art should know, so they will not be described here in detail.

[0048] Reference Figure 4 and Figure 5 , the mounting panel 1 is provided with a winding correction mechanism 100 for pre-winding the pole piece and the diaphragm, the winding correction mechanism 100 includes a winding support seat 101, a winding correction cylinder 102, two winding correction rollers 103 and two winding correction sensors 104, the two winding correction rollers 103 are symmetrically installed on both sides of the winding support seat 101, so that they are used to correct the winding of the pole piece, the telescopic end of the winding correction cylinder 102 extends toward one end of the winding correction roller 103, and a correction bracket 105 for installing the winding correction sensor 104 is provided on the telescopic end of the winding correction cylinder 102, the two winding correction sensors 104 are symmetrically distributed at one end of the two winding correction rollers 103, so that the winding correction sensor 104 can detect the position of the pole piece after being corrected by the winding correction roller 103 under the drive of the winding correction cylinder 102;

[0049] The bottom of the winding support seat 101 is provided with a sheet guide roller 106 for guiding the incoming sheet for conveying. The sheet guide roller 106 is provided with two, and the two sheet guide rollers 106 are symmetrically distributed on both sides of the winding support seat 101, so that the two sheet guide rollers 106 are used to press the conveyed sheet. The sheet guide roller 106 can guide the incoming sheet for conveying. Through the symmetrical arrangement of the sheet guide roller 106, the accuracy of conveying the two sheets is further ensured, so that the subsequent winding is accurate.

[0050] Referring to Figure 4 , the winding support seat 101 is provided with a heating gas pipe 7 for heating the diaphragm and the sheet. One end of the heating gas pipe 7 passes through the winding support seat 101 and is connected to the installation valve 8 for guiding the external heating gas. A plurality of gas outlet holes 9 are formed in the heating gas pipe 7. The gas outlet holes 9 extend to the outer surface of the sheet, so that the heating gas pipe 7 is used to heat the sheet and the diaphragm passing through the winding correction mechanism 100 through the gas outlet holes 9. The heating gas pipe 7 is connected to the gas inlet pipe through the installation valve 8. One end of the gas inlet pipe is connected to the heating box (not shown). The heating box is provided with an electric heating wire (not shown) for heating the gas. The heating box is provided with a heat conduction fan (not shown) for uniformly sending the heated air into the heating gas pipe 7 to heat the sheet and the diaphragm.

[0051] Specifically, the heated air in the heating box is conveyed by the heat conduction fan, so that the diaphragm and the sheet are heated in the area by the gas outlet holes 9 of the heating gas pipe 7. In this way, the internal stress of the diaphragm and the sheet during the unwinding process can be uniformly released, and the phenomenon of poor winding quality and consistency caused by uneven internal stress can be further reduced. In this embodiment, the heating mainly acts on the diaphragm. The action principle is a known technology known to those skilled in the art, and will not be described here.

[0052] The unwinding conveying direction of the first sheet unwinding mechanism 4 and the second sheet unwinding mechanism 5 is provided with a clamping sheet conveying mechanism 200 for clamping and conveying the sheet. The clamping sheet conveying mechanism 200 and the winding correction mechanism 100 are provided with a sheet cutting mechanism 10 for cutting the sheet. The winding mechanism 6 winds the sheet to a set length. The sheet is clamped by the clamping sheet conveying mechanism 200, cut by the sheet cutting mechanism 10, and wound by the winding mechanism 6. The installation panel 1 is provided with a diaphragm cutting mechanism 11 for cutting the diaphragm wound to a set length. The installation panel 1 is provided with a gluing mechanism for gluing the diaphragm and the sheet to form a battery cell. After gluing, the battery cell is discharged by the discharging mechanism 12.

[0053] Referring to Figure 2 , Figure 3 and Figure 6The film feeding mechanism 200 includes a film feeding clamping support 201, an upper film feeding clamp roller seat 202, a lower film feeding clamp roller seat 203 and two film feeding plates 204. The mounting panel 1 is connected to the film feeding clamping support 201 through a moving rod. The upper film feeding clamp roller seat 202 is installed on the film feeding clamping support 201. The lower film feeding clamp roller seat 203 is installed on the film feeding clamping support 201 through a driving cylinder 205. The telescopic end of the driving cylinder 205 is connected to the lower film feeding clamp roller seat 203 and can drive the lower film feeding clamp roller seat 203 to move toward the upper film feeding clamp roller seat 202. A clamping gap for clamping the electrode is formed between the upper film feeding clamp roller seat 202 and the lower film feeding clamp roller seat 203. The two film feeding plates 204 are installed at one end of the film feeding clamping support 201 close to the electrode cutting mechanism 10.

[0054] After the electrode is unwound and conveyed through the winding correction mechanism 100 and enters the winding mechanism 6, it is wound by the winding mechanism 6 to the set length, and the unwinding conveying end of the electrode is clamped by the upper roller seat 202 and the lower roller seat 203 of the clamping and feeding mechanism 200, and the electrode is clamped by the feeding plate 204. After the electrode is cut by the electrode cutting mechanism 10, the mobile module is used to drive the clamping and feeding mechanism 200 to feed the electrode to the winding correction mechanism 100 for the next step of winding the electrode and diaphragm, thereby repeating the action to complete the manufacture of the battery cell. The specific structure and operation principle of the clamping and feeding mechanism 200 are well-known technologies that should be known to those skilled in the art, so they will not be described here.

[0055] Reference Figure 7-Figure 9 , the mounting panel 1 is provided with a first pressing mechanism 300a and a second pressing mechanism 300b for pressing and tensioning the electrode sheet and the diaphragm, the first pressing mechanism 300a and the second pressing mechanism 300b are distributed on both sides of the winding correction mechanism 100, the first pressing mechanism 300a and the second pressing mechanism 300b each include a mounting base 301, a sheet feeding pressure roller 302, a tensioning roller 303 and a pressing roller 304, the mounting base 301 is connected to a pressing cylinder 305 through a moving part, the telescopic end of the pressing cylinder 305 extends toward the winding correction mechanism 100 and is connected to the pressing roller 304, a tensioning cylinder 306 is provided on the moving part, and the tensioning cylinder 306 is provided on the moving part. The telescopic short tilt of the cylinder 306 extends toward the winding correction mechanism 100 and is connected to the tensioning roller 303. The movable part is connected to the film feed guide seat 308 through a connecting plate 307. The film feed guide seat 308 is connected to the low-pressure plate 309 through a guide rod. The end of the pressure plate extending toward the winding correction mechanism 100 is formed with a pressure portion 310. The film feed pressure roller 302 is installed on the end of the pressure plate close to the winding correction mechanism 100, so that when the pressure cylinder 305 drives the movable part to move toward the winding correction mechanism 100, the film feed pressure roller 302, the tensioning roller 303 and the pressure roller 304 move toward the winding correction mechanism 100 and press the corresponding diaphragm and pole piece.

[0056] Specifically, the first pressing mechanism 300a and the second pressing mechanism 300b are symmetrically arranged, so that they can accurately press the electrode piece and the diaphragm, further improving the fitting effect of the electrode piece and the diaphragm, thereby enabling subsequent accurate winding.

[0057] A cavity is formed inside the pressure plate, and a cooling assembly (not shown) is connected to the side of the pressure plate through a connecting valve. The cooling assembly includes a cooling box, a cooling pipe and a heat dissipation fan. One end of the cooling pipe is connected to the connecting valve, and the other end of the cooling pipe is connected to the cooling box, so that the heat dissipation fan is installed in the cooling box. A cooling hole connected to the cavity is provided on the pressure plate. The cooling hole extends through the pressure portion 310 to the winding correction mechanism 100. The cooling assembly can cool the pressed diaphragm and pole piece through the cooling hole, thereby preventing the heating air pipe 7 from heating the diaphragm and pole piece to high temperature.

[0058] The specific usage principle in this embodiment is:

[0059] The diaphragm and the electrode are supplied synchronously and stably through the first and second diaphragm unwinding mechanisms 3 and the first and second electrode unwinding mechanisms 5. After the electrode is powdered and dusted, the length is measured and the defect is detected along the unwinding conveying direction, the electrode enters the correction component 15 for correction, so that the electrode passes through the clamping and feeding mechanism 200 and the electrode cutting mechanism 10 to enter the winding correction mechanism 100 for secondary correction, and the electrode is conveyed along the sheet guide roller 106 through the two winding correction rollers 103 to perform precise correction adjustment on each of the wound electrode sheets. At the same time, the winding correction sensor 104 on the correction bracket 105 is driven by the winding correction cylinder 102 to correct the electrode sheets corrected on the two winding correction rollers 103, and the second diaphragm unwinding mechanism 3 conveys the diaphragm between the two electrode sheets, so that it passes through the winding correction mechanism 100 for precise guidance and correction, so that the positive electrode sheet-diaphragm-negative electrode sheet are arranged in sequence;

[0060] The first diaphragm unwinding mechanism 2 introduces the diaphragm from the side into the winding correction mechanism 100 for correction and correction, so that it forms a diaphragm-positive electrode sheet-diaphragm-negative electrode sheet in sequence. When passing through the winding correction mechanism 100, the external set stable hot air is introduced through the heating air pipe 7 and discharged from the air outlet 9, thereby heating the electrode sheet and the diaphragm, further releasing the internal stress of the diaphragm and the electrode sheet during the unwinding and transmission process, thereby reducing the internal stress caused by stretching and bending during the unwinding process. At the same time, by heating the diaphragm and the electrode sheet, it helps to improve the electrode sheet and The softness and ductility of the diaphragm, as well as the pressure of the first and second electrode unwinding mechanisms 5 on the diaphragm and electrode, make the winding process of the diaphragm and electrode into the winding mechanism 6 smoother, so that the diaphragm and electrode are accurately aligned and fitted, further reducing the displacement of the unwinding transmission process, improving the winding accuracy and consistency of the battery cell quality, making the diaphragm and electrode tightly fitted to form a battery cell, and rotated to the unloading position under the drive of the winding mechanism 6, and the battery cell is unloaded through the unloading mechanism 12, further improving production efficiency and quality.

[0061] The intelligent winding method of the lithium battery automatic winding machine in this embodiment includes the following steps:

[0062] Step 1: Use a lithium battery automatic winding machine to wind the diaphragm and electrode;

[0063] Step 2: Unwinding, the unwinding of the diaphragm and the electrode sheet is controlled by the diaphragm unwinding module and the electrode sheet unwinding module of the controller, the first diaphragm unwinding mechanism 2 and the second diaphragm unwinding mechanism 3 pass the two diaphragms through the ultrasonic detection mechanism in the unwinding conveying direction for detection, and thus enter the pre-wound winding correction mechanism 100 respectively, the first electrode sheet unwinding mechanism 4 and the second electrode sheet unwinding mechanism 5 are used to convey the positive and negative electrode sheets to the winding correction mechanism 100 respectively, and the positive and negative electrode sheets pass through the powder brushing component 13, the measuring component 14 and the correction component 15 in turn for powder brushing and dust removal, length measurement and correction, and are conveyed to the clamping and feeding mechanism 200, and pass through the electrode sheet cutting mechanism 10 under the clamping and feeding mechanism 200 to enter the pre-wound winding correction mechanism 100;

[0064] Step 3: Heating. The heating module of the controller controls the electric heating wire in the heating box to energize and heat it. A heat-conducting blower is used to transport the heated hot air through the air inlet pipe to the heating air pipe 7. The diaphragm and the electrode piece passing through the winding correction mechanism 100 are heated through the air outlet 9 on the heating air pipe 7. A temperature sensor for real-time monitoring of the temperature of the winding area is installed in the heating box, and a cooling blower for cooling is provided in the heating box. The temperature of the hot air inside the heating box is 80°C when it passes through the air outlet 9, so that the electrode piece and the diaphragm are bonded together.

[0065] Step 4: Correction of winding deviation. The winding correction module of the controller controls the winding correction mechanism 100 to guide the incoming diaphragm, positive electrode sheet, diaphragm and negative electrode sheet. When the diaphragm and electrode sheet are wound to the set length, the electrode sheet cutting mechanism 10 cuts the electrode sheet of the set length. The positive electrode sheet and the negative electrode sheet are corrected respectively by two winding correction rollers 103. The winding correction cylinder 102 drives the winding correction sensor 104 on the correction bracket 105 to correct the positive and negative electrode sheets after correction. , and the diaphragm and the electrode sheet are pressed by the first pressing mechanism 300a and the second pressing mechanism 300b, so that the diaphragm, the positive electrode sheet, the diaphragm and the negative electrode sheet pass through the winding correction mechanism 100 and enter the winding mechanism 6 to form a precise fit. At the same time, the diaphragm and the electrode sheet are cooled by the cooling holes on the pressing plate. The sheet feeding roller 302, the tensioning roller 303 and the pressing roller 304 on the first pressing mechanism 300a and the second pressing mechanism 300b extend toward the winding correction mechanism 100 to abut against the diaphragm and the electrode sheet;

[0066] Step 5: Winding: The winding module of the controller controls the winding mechanism 6 to wind the separator, positive electrode sheet, separator, and negative electrode sheet after the deviation correction, and the separator cutting mechanism 11 is used to cut the wound separator;

[0067] Step 6: Gluing: The gluing module of the controller controls the gluing mechanism to glue and bond the diaphragm and the electrode, so that the two diaphragms and the positive and negative electrode sheets are wound to form a finished lithium battery cell;

[0068] Step 7: unloading: the unloading module of the controller controls the unloading mechanism 12 to unload the wound battery cell products.

[0069] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention are all within the scope of the technical solution of the present invention without departing from the content of the technical solution of the present invention.

Claims

1. A lithium battery automatic winding machine, comprising a mounting panel, on which are provided a first diaphragm unwinding mechanism and a second diaphragm unwinding mechanism for conveying diaphragms, and a first electrode sheet unwinding mechanism and a second electrode sheet unwinding mechanism for conveying electrode sheets, and a winding mechanism for winding the diaphragms and electrode sheets, characterized in that: The mounting panel is provided with a winding correction mechanism for pre-winding the pole piece and the diaphragm, and the winding correction mechanism includes a winding support seat, a winding correction cylinder, two winding correction rollers and two winding correction sensors. The two winding correction rollers are symmetrically installed on both sides of the winding support seat, so that they are used to correct the winding of the pole piece. The telescopic end of the winding correction cylinder extends toward one end of the winding correction roller, and a correction bracket for installing the winding correction sensor is provided on the telescopic end of the winding correction cylinder. The two winding correction sensors are symmetrically distributed at one end of the two winding correction rollers, so that the winding correction sensor can detect the position of the pole piece after passing through the winding correction roller for correction and winding under the drive of the winding correction cylinder. The winding support seat is provided with a heating air pipe for heating the diaphragm and the electrode piece. One end of the heating air pipe passes through the winding support seat and is used to introduce external heating gas through the installation valve. The heating air pipe is provided with a plurality of conductive air outlet holes, which extend toward the outer surface of the electrode piece, so that the heating air pipe passes through the air outlet holes to heat the electrode piece and the diaphragm passing through the winding correction mechanism. The first diaphragm unwinding mechanism and the second diaphragm unwinding mechanism are used to introduce the two diaphragms into the pre-wound winding correction mechanism respectively along the unwinding conveying direction, and the first electrode sheet unwinding mechanism and the second electrode sheet unwinding mechanism are used to introduce the positive and negative electrode sheets into the pre-wound winding correction mechanism respectively along the unwinding conveying direction, so that the winding correction mechanism is used to calibrate the two diaphragms and the positive and negative electrode sheets and then transport them into the winding mechanism for winding; The unwinding and conveying directions of the first electrode unwinding mechanism and the second electrode unwinding mechanism are provided with a clamping and feeding mechanism for clamping and conveying the electrode, and a electrode cutting mechanism for cutting the electrode is provided between the clamping and feeding mechanism and the winding correction mechanism, so that the winding mechanism winds the electrode to a set length, clamps it by the clamping and feeding mechanism, cuts it by the electrode cutting mechanism, and is reeled up by the winding mechanism, and a diaphragm cutting mechanism for cutting the diaphragm wound to a set length is provided on the installation panel, and a gluing mechanism is used on the installation panel to finish gluing the diaphragm and the electrode to form a battery cell, so that the battery cell is unloaded by the unloading mechanism after gluing.

2. The automatic lithium battery winding machine according to claim 1, characterized in that: The first pole piece unwinding mechanism and the second pole piece unwinding mechanism are distributed with a powder brushing component, a measuring component and a correcting component for respectively brushing powder, measuring and correcting the pole piece in the direction of conveying toward the winding mechanism. The powder brushing component includes a brush and a dust box. The dust box is installed on the installation panel. The brush is arranged in the dust box, and the outer surface of the brush is pressed and contacted with the outer surface of the pole piece, so that the pole piece is brushed with powder and dusted along the outer surface of the brush during transportation.

3. The automatic lithium battery winding machine according to claim 2, characterized in that: The heating air pipe is connected to the air inlet pipe through an installation valve, one end of the air inlet pipe is connected to the heating box, and an electric heating wire for heating the gas is provided in the heating box. The heated air is evenly sent into the heating air pipe through a heat-conducting blower in the heating box to heat the electrode and the diaphragm.

4. The automatic lithium battery winding machine according to claim 1, characterized in that: The roll-in support seat is provided with a roll-in guide roller for introducing the electrode for transportation. There are two roll-in guide rollers, and the two roll-in guide rollers are symmetrically distributed on both sides of the roll-in support seat, so that the two roll-in guide rollers are used to press the electrode for transportation.

5. The automatic lithium battery winding machine according to claim 1, characterized in that: The film clamping and feeding mechanism includes a film feeding clamping support, an upper film feeding clamp roller seat, a lower film feeding clamp roller seat and two film feeding plates. The mounting panel is connected to the film feeding clamping support through a moving rod. The upper film feeding clamp roller seat is installed on the film feeding clamping support. The lower film feeding clamp roller seat is installed on the film feeding clamping support through a driving cylinder. The telescopic end of the driving cylinder is connected to the lower film feeding clamp roller seat, and can drive the lower film feeding clamp roller seat to move toward the upper film feeding clamp roller seat. A clamping gap for clamping the electrode is formed between the upper film feeding clamp roller seat and the lower film feeding clamp roller seat. The two film feeding plates are installed at one end of the film feeding clamping support close to the electrode cutting mechanism.

6. The automatic lithium battery winding machine according to claim 1, characterized in that: The first pressing mechanism and the second pressing mechanism are distributed on both sides of the winding correction mechanism, and the first pressing mechanism and the second pressing mechanism include a mounting base, a sheet feeding pressure roller, a tensioning roller and a pressing roller, and a pressing cylinder is connected to the mounting base through a moving part, and the telescopic end of the pressing cylinder extends toward the winding correction mechanism and is connected to the pressing roller. The moving part is connected to the sheet feeding guide seat through a connecting plate, and the sheet feeding guide seat is connected to the low-pressure plate through a guide rod, and a pressing portion is formed at one end of the pressing plate extending toward the winding correction mechanism. The sheet feeding pressure roller is installed on the pressure plate near the winding correction mechanism, so that when the pressing cylinder drives the moving part to move toward the winding correction mechanism, the sheet feeding pressure roller, the tensioning roller and the pressing roller move toward the winding correction mechanism and press the corresponding diaphragm and the electrode.

7. The automatic lithium battery winding machine according to claim 6, characterized in that: The inner part of the pressure plate is formed with a cavity, and the side of the pressure plate is connected to the cooling unit through a connecting valve. The cooling assembly includes a cooling box, a cooling pipe and a heat dissipation fan. One end of the cooling pipe is connected to the connecting valve, and the other end of the cooling pipe is connected to the cooling box, so that the heat dissipation fan is installed in the cooling box. A cooling hole connected to the cavity is provided on the pressure plate, and the cooling hole extends through the pressure part to the winding correction mechanism.

8. Intelligent winding method of lithium battery automatic winding machine, characterized in that, The intelligent winding method comprises the following steps: Step 1: Winding the separator and the electrode using the lithium battery automatic winding machine according to any one of claims 1 to 7; Step 2: Unwinding, the unwinding of the diaphragm and the electrode sheet is controlled by the diaphragm unwinding module and the electrode sheet unwinding module of the controller, the first diaphragm unwinding mechanism and the second diaphragm unwinding mechanism pass the two diaphragms through the ultrasonic detection mechanism in the unwinding conveying direction for detection, so that they enter the pre-wound winding correction mechanism respectively, the first electrode sheet unwinding mechanism and the second electrode sheet unwinding mechanism are used to convey the positive and negative electrode sheets to the winding correction mechanism respectively, the positive and negative electrode sheets pass through the powder brushing component, the measuring component and the deviation correction component in turn for powder brushing and dust removal, length measurement and deviation correction, and are conveyed to the clamping and feeding mechanism, pass through the clamping and feeding mechanism, pass through the electrode sheet cutting mechanism and enter the pre-wound winding correction mechanism; Step 3: Heating: The heating module of the controller controls the electric heating wire in the heating box to energize and heat it. A heat-conducting blower is used to transport the heated hot air through the air inlet pipe to the heating air pipe. The diaphragm and electrode that have passed through the winding correction mechanism are heated through the air outlet holes on the heating air pipe. Step 4: Roll-in correction. The roll-in correction module of the controller controls the roll-in correction mechanism to guide the incoming diaphragm, positive electrode sheet, diaphragm and negative electrode sheet. When the electrode sheet is wound to a set length, the electrode sheet cutting mechanism cuts the electrode sheet of the set length, and the positive electrode sheet and the negative electrode sheet are corrected respectively by two winding correction rollers. The winding correction cylinder drives the winding correction sensor on the correction bracket to correct the corrected positive and negative electrode sheets, and the diaphragm and the electrode sheet are pressed by the first pressing mechanism and the second pressing mechanism, so that the diaphragm, positive electrode sheet, diaphragm and negative electrode sheet pass through the winding correction mechanism and form a precise fit before entering the winding mechanism. At the same time, the diaphragm and the electrode sheet are cooled and cooled through the cooling holes on the pressing plate. Step 5: Winding: The winding module of the controller controls the winding mechanism to wind the separator, positive electrode sheet, separator, and negative electrode sheet after the winding correction, and the separator cutting mechanism is used to cut the wound separator; Step 6: Gluing: The gluing module of the controller controls the gluing mechanism to glue and bond the diaphragm and the electrode, so that the two diaphragms and the positive and negative electrode sheets are wound to form a finished lithium battery cell; Step 7: Unloading: The unloading module of the controller controls the unloading mechanism to unload the wound battery cell products.

9. The intelligent winding method of the lithium battery automatic winding machine according to claim 8, characterized in that: In step three, a temperature sensor for real-time monitoring of the temperature of the winding area is installed in the heating box, and a cooling fan for cooling is provided in the heating box. The temperature of the hot air inside the heating box that passes through the air outlet is 70°C-85°C, so that the electrode and the diaphragm are fitted together.

10. The intelligent winding method of the lithium battery automatic winding machine according to claim 8, characterized in that: In the step 4, the sheet feeding roller, the tensioning roller and the pressing roller on the first pressing mechanism and the second pressing mechanism extend toward the winding correction mechanism so as to abut against the diaphragm and the electrode sheet.

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