A turret-free double-station automatic winding equipment for coating lithium battery foil

Abstract

The present invention proposes a turret-free double-station automatic winding device for coating lithium battery foil, which belongs to the field of lithium battery electrode processing. The present invention includes a traction mechanism and a turret-free reel-changing mechanism. The turret-free reel-changing mechanism includes a reeling base, a reel-changing assembly, and a reeling assembly. Reeling wall panels are provided on both the inner and outer sides of the reeling base. The reel-changing assembly is slidably mounted on the inner reeling wall panels. The reel-changing assembly is driven by a transmission mechanism to slide up and down relative to the reeling wall panels. The reeling assembly includes a reeling swing arm and a reeling cylinder. The reeling swing arm has three swing positions in its swing trajectory. The reeling swing arm is driven by the reeling cylinder to swing to the tape reel-changing position, the full reel position, or the unloading position. The reel-changing assembly cooperates with a pair of reeling assemblies to complete reeling and reel-changing. The present invention adopts a turret-free reeling method to solve the problem that the weight of the A / B axis of the turret-type automatic reeling cannot always be balanced. During the process of the A / B axis changing positions through the turret, the parallelism difference of the roller on the turret causes the reeling electrode to deviate.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery substrate processing, and in particular to a turret-free double-station automatic winding device for coating lithium battery foil. Background Art

[0002] The preparation of positive and negative electrodes is crucial in the core process of lithium battery manufacturing. These electrodes rely on aluminum foil and copper foil as substrates, respectively. These substrates require coating and drying with the corresponding slurry before they become the battery's positive and negative electrodes. During the production process, these substrates are unwound in continuous rolls, undergoing precise coating, drying, and curing processes before being wound up. To improve production efficiency and optimize substrate utilization, winding equipment often utilizes a dual-station automatic winding mechanism. Conventional dual-station automatic winding equipment consists of a traction cutter mechanism that provides substrate transport and automatic splicing during roll-changing, while the turret-type dual-axis winding mechanism enables active winding and automatic roll-changing between the A / B axes. While dual-station automatic winding equipment offers significant advantages in increasing production capacity, its performance faces challenges when handling relatively heavy substrates such as aluminum and copper foil. Factors such as substrate load, width, tension, speed, and structural factors can easily lead to poor winding.

[0003] First of all, due to the inherent quality characteristics of aluminum foil and copper foil, their mass is larger than that of isolation film, PET film, optical film, etc., and the weight imbalance problem caused by the left and right layout of the A / B axes in the turret structure makes it difficult to maintain the parallelism of the rollers during the turret replacement process, which in turn causes the winding pole piece to deviate, seriously affecting the winding quality.

[0004] Secondly, the substrate's layout characteristics are also a factor that cannot be ignored. As the substrate width increases, the coated electrode is more susceptible to stress concentration in the tab blank area, causing wrinkles or even bulging. This not only damages the electrode's flatness but may also adversely affect subsequent battery assembly.

[0005] Furthermore, the increase in width and roll diameter directly correlates to complex changes in winding tension. The difficulty of controlling tension during the winding process of wide, large-diameter pole pieces increases significantly. Tension mismatch can easily lead to roll slippage and end-face misalignment, seriously affecting winding stability and finished product quality.

[0006] Furthermore, if the cutter arm's lifting motion during the roll change process isn't precisely synchronized, it can lead to poor bottoming and wrinkling of the bottom roll. This not only increases the need for manual intervention and wastes valuable material resources, but can also pose safety risks due to improper operation.

[0007] Finally, while increasing winding speed significantly improves production efficiency, it also introduces new challenges. During high-speed winding, air becomes more difficult to effectively expel, resulting in voids within the coil and insufficient winding tightness, which in turn can lead to quality issues such as slippage and end-face misalignment.

[0008] In summary, in response to the above-mentioned problems existing in the existing double-station automatic winding equipment when processing aluminum foil and copper foil substrates, it is necessary to carry out technological innovation and optimization to improve the winding accuracy, stability and efficiency, and ensure the high-quality preparation of positive and negative electrode materials for lithium batteries. Summary of the Invention

[0009] The purpose of the present invention is to provide a turret-free double-station automatic winding device for coating lithium battery foil to solve the above technical problem of poor winding.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A turret-less dual-station automatic winding device for coating lithium battery foil includes a traction mechanism located at the traction station and a turret-less reel-changing mechanism located at the reeling station. The traction station and the reeling station are arranged side by side. The foil electrode is first pulled by the traction mechanism into the turret-less reel-changing mechanism, and the reel-changing or reeling process is performed by a control unit.

[0012] The turret-less roll-changing mechanism includes a winding base, a roll-changing assembly and a winding assembly, wherein winding wall panels are provided on both inner and outer sides of the winding base, and the two winding wall panels are tightened and positioned by wall panel cross braces, and the roll-changing assembly is slidably mounted on the inner winding wall panel, and the roll-changing assembly is driven by a transmission mechanism to slide up and down relative to the inner winding wall panel, and the roll-changing assembly cooperates with a pair of the winding assemblies arranged on its right side and symmetrically arranged up and down to complete winding and changing.

[0013] The winding assembly includes a winding swing arm, a winding air shaft and a winding cylinder. The winding swing arm has three swing positions in its swing trajectory, which are, from left to right, the tape splicing and roll changing position, the full roll position and the unloading position. The winding swing arm is composed of two oppositely arranged swing rods, and a swing shaft is provided between the same ends of the two swing rods. Two swing rods are passed through the two ends of the swing shaft and are fixed between the two winding wall panels. The winding air shaft is provided between the other identical ends of the two swing rods. Each swing rod is driven by one of the winding cylinders, and together pushes a pair of swing rods to make the winding swing arm swing to the tape splicing and roll changing position, the full roll position or the unloading position.

[0014] As a preferred embodiment of the present invention, the roll-changing assembly includes a roll-changing support body, a first winding rubber roller and a second winding rubber roller. The roll-changing support body is composed of two roll-changing slides arranged upright and inside and outside. The two roll-changing slides are tightened and fixed by a slide cross brace. A linear guide pair is vertically arranged on the inner winding wall panel. A slider is provided on the inner roll-changing slide to cooperate with the linear guide pair. Under the drive of the transmission mechanism, the roll-changing assembly slides up and down relative to the winding wall panel;

[0015] The second winding rubber roller and the first winding rubber roller are arranged symmetrically up and down, and the same end of each roller is fixed to the inner roll-changing slide via a first bearing seat. A driving assembly is provided at the extended shaft position of the same other end, which synchronously pulls the foil electrode with the corresponding winding air shaft during winding.

[0016] A glue sensor is provided on one side of the first / second winding rubber roller close to the winding swing arm at the tape splicing and roll changing position. The glue sensor is fixed to the roll changing slide through a bracket, and the glue sensor is electrically connected to the control unit.

[0017] Furthermore, a cutter mechanism is provided below the first winding rubber roller and above the second winding rubber roller, the cutter mechanism includes a cutter assembly, a cutter cylinder and a second bearing seat, the second bearing seat is fixed on the inner side of the roll-changing slide, the cutter assembly includes a cutter body and a rotating shaft, one end of the cutter body is provided with the rotating shaft that cooperates with the second bearing seat, and the other end is a blade for cutting the electrode piece, one end of the cutter cylinder is connected to the rotating shaft, and when the glue sticking sensor detects that the winding shaft approaches the first / second winding rubber roller and is close to it, the control unit receives a close signal, controls the action of the cutter cylinder, drives the rotating shaft to rotate, and the cutter cuts the electrode piece to realize roll changing.

[0018] As a preferred embodiment of the present invention, the glue sensor is fixed on the inner roll-changing slide plate through a bracket.

[0019] As a preferred embodiment of the present invention, the transmission mechanism includes a transmission rack and a driving gear, the transmission rack is vertically installed on the inner winding wall panel, the driving gear is installed on the inner roll-changing slide, and a motor is provided on the driving gear, and the motor drives the driving gear to move on the transmission rack.

[0020] As a preferred embodiment of the present invention, both ends of the swing shaft are fixed between the two rolling wall panels through flanges.

[0021] As a preferred embodiment of the present invention, a reel is sleeved on the reeling air shaft, and the reeling air shaft is used to expand the reel and is fixed between a pair of rocker arms through a quick-release structure. The reeling air shaft is connected to the reeling motor through a synchronous belt for active reeling.

[0022] As a preferred embodiment of the present invention, the traction mechanism includes a traction roller assembly, a traction pressure roller assembly, a traction base and a traction wall panel, and a traction wall panel is fixedly provided on the inner and outer sides of the traction base, and the two traction wall panels are tightened and positioned by a first cross brace; the traction roller assembly includes a main drive roller, a third bearing seat and a main cylinder, and the main drive roller is fixed to the inner traction wall panel through the third bearing seat, and the main drive roller is connected to the protruding end of the main cylinder to drive the foil pole piece; the traction pressure roller assembly includes a pressure roller, a rotating seat and a clamping cylinder, and the pressure roller is fixed to the inner traction wall panel through the rotating seat, and the pressure roller is connected to the protruding end of the clamping cylinder, and the pressure roller is driven by the clamping cylinder to clamp the foil pole piece, and the pressure roller cooperates with the main drive roller to pull the foil pole piece.

[0023] Furthermore, the traction mechanism also includes a correction component, which is installed on the top of the traction wall panel. The foil pole piece passes through the correction component before passing through the traction roller assembly. Several tension rollers fixed on the traction wall panel are also provided between the correction component and the traction pressure roller assembly.

[0024] Furthermore, the traction mechanism also includes a floating swing roller assembly for detecting and controlling the winding tension. The floating swing roller assembly is arranged below the traction roller assembly. The foil pole piece passes through the traction roller assembly and then passes through the floating swing roller assembly. The floating swing roller assembly is provided with a plurality of supporting rollers on the side close to the winding station.

[0025] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The turret-less winding technology introduced in this invention innovatively solves the inherent imbalance problem of traditional turret-based automatic winding systems for aluminum and copper foil in lithium battery manufacturing. This design completely eliminates the electrode deviation caused by uneven weight and roller parallelism during the A / B axis rotation process, directly improving winding accuracy and stability. This lays a solid foundation for subsequent coating and electrode slitting processes, significantly reduces the risk of electrode breakage, and ensures the continuity and efficiency of the production line.

[0027] 2. The application of the present invention effectively addresses the challenges brought about by the increase in the width of electrode substrates in the lithium battery industry. By optimizing tension control, it avoids the problems of slippage and end face misalignment caused by tension mismatch, significantly reduces material scrap due to poor winding, and eliminates the tediousness and cost of secondary rewinding, directly improving the economic benefits of production. In the roll changing process, the roll changing assembly design of the double-winding rubber roller achieves precise position fixation, abandons the traditional swing arm lifting method, and ensures that the first / second winding rubber roller is parallel to the winding A / B axis during the roll changing process. This not only improves the roll changing efficiency, but also fundamentally solves the problem of poor bottoming during roll changing, completely eliminates the safety hazards that may arise from manual bottom wrinkle removal, and enhances the safety of production operations.

[0028] 3. The winding equipment of this invention adopts a compact active winding method, which tightly integrates the winding rubber roller and the winding A / B shafts, effectively reducing the air content in the coil. The finished product is more compact and uniform, effectively avoiding quality issues such as slippage and end face misalignment. Particularly noteworthy is that this design also automatically smoothes wrinkles and bulges in the wide center tab margin during the winding process, significantly improving the smoothness and aesthetics of the coiled surface. This provides a higher-quality substrate for subsequent coating and slitting processes, further improving product yield and overall production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the turret-free double-station automatic winding device of the present invention;

[0030] Figure 2 This is a front sectional view of the turret-free double-station automatic winding device of the present invention;

[0031] Figure 3 Schematic diagram of the three-dimensional structure of the roll changing assembly in the turret-free double-station automatic winding device of the present invention;

[0032] Figure 4 This is a front cross-sectional view of a roll-changing assembly in a turret-free double-station automatic winding device according to the present invention;

[0033] Figure 5 It is a three-dimensional structural diagram of the winding swing arm in the turret-free double-station automatic winding device of the present invention;

[0034] Figure 6 Schematic diagram of the swing trajectory of the winding swing arm in the turret-free double-station automatic winding device of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the traction mechanism in the turret-free double-station automatic winding device of the present invention;

[0036] Figure 8 Schematic diagram of the winding process of replacing the winding shaft A with the winding shaft B according to an embodiment of the present invention;

[0037] Figure 9 Schematic diagram of the winding process of replacing the winding B axis with the winding A axis according to an embodiment of the present invention;

[0038] In the figure, 100-traction mechanism, 101-traction base, 102-traction wallboard, 103-floating swing roller assembly, 1030-tension sensor, 104-traction roller assembly, 1041-main drive roller, 1042-third bearing seat, 1043-main cylinder, 105-traction pressure roller assembly, 1050-pressure roller, 106-first cross brace, 107-correction assembly, 108-tension roller, 109-support roller; 200-turretless roll changing mechanism, 201-winding base, 202-winding wallboard, 203-wallboard cross brace, 204-linear guide pair, 205-glue sensor, 210-roll changing assembly, 211-roll changing support, 2110-roll changing slide, 2111-slide cross brace, 212 -First winding rubber roller, 213-Second winding rubber roller, 214-First bearing seat, 215-Drive assembly, 216-Cutter mechanism, 2160-Cutter assembly, 21601-Cutter body, 21602-Rotating shaft, 2161-Cutter cylinder, 2162-Second bearing seat; 220-Winding assembly, 221-Winding swing arm, 2210-Swing track, 2211-Tape splicing and reel changing position, 2212-Full roll position, 2213-Unloading position, 2220-Swing rod, 2221-Swing shaft, 2222-Winding cylinder, 2223-Timing belt, 2224-Winding motor, 222-Winding air shaft; 230-Transmission mechanism, 231-Drive rack, 232-Drive gear, 233-Drive motor;

[0039] 1-foil electrode, 10-winding axis A, 20-winding axis B; Ⅰ-A axis unloading position, Ⅱ-B axis reel changing position, Ⅲ-B axis full reel position, Ⅳ-upper reeling position; Ⅴ-B axis unloading position, Ⅵ-A axis full reel position, Ⅶ is A axis reel changing position, and Ⅷ is lower reeling position. DETAILED DESCRIPTION

[0040] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments given here are only used to illustrate and explain the present invention and cannot be used to limit the present invention.

[0041] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also have other implementations and variations thereof. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0042] Reference Attachment Figure 1 To the attached Figure 9A lithium battery foil coating turret-free double-station automatic winding device comprises a traction mechanism 100 provided at the traction station and a turret-free reel-changing mechanism 200 provided at the reeling station. The traction station and the reeling station are arranged side by side on the left and right. The foil electrode 1 is first pulled by the traction mechanism 100 into the turret-free reel-changing mechanism 200, and the reel-changing or reeling process is performed by a control unit (not shown in the figure). The control unit of the present invention is a controller. As the core component of the automation and intelligent system of the reeling equipment, the controller controls the reeling equipment and obtains data and signals through sensors, input devices or network interfaces. The logic circuit or microprocessor inside the controller processes the input signals and makes decisions according to a preset control algorithm or program. Based on the processing results, the controller generates control signals such as traction, reel changing or reeling.

[0043] Reference Figure 2 The turret-less roll-changing mechanism 200 includes a winding base 201, a roll-changing assembly 210 and a winding assembly 220. Winding wall panels 202 are provided on both the inner and outer sides of the winding base 201. The two winding wall panels 202 are tightened and positioned by a wall panel cross brace 203. The roll-changing assembly 210 is slidably installed on the inner winding wall panel 202. The roll-changing assembly 210 is driven by a transmission mechanism 230 to slide up and down relative to the inner winding wall panel 202. The roll-changing assembly 210 cooperates with a pair of the winding assemblies 220 arranged on its right side and arranged symmetrically up and down to complete winding and roll changing.

[0044] Reference Figure 5 and Figure 6 The winding assembly 220 includes a winding swing arm 221, a winding air shaft 222 and a winding cylinder 2222. The swing trajectory 2210 of the winding swing arm 221 has three swing positions, which are a tape-splitting and roll-changing position 2211, a full roll position 2212 and a material-unloading position 2213 from left to right. The full roll position 2212 can be set according to the actual roll diameter. The winding swing arm 221 is composed of two oppositely arranged swing rods 2220. A swing shaft 2221 is provided between the same ends of the two swing rods 2220. Two ends of the swing shaft 2221 are penetrated by The rocker arm 2220 is fixed between the two winding wall panels 202, and the winding air shaft 222 is provided between the other ends of the two rocker arms 2220. Each rocker arm 2220 is driven by a winding cylinder 2222, and jointly pushes a pair of rocker arms 2220 to make the winding swing arm 221 swing to the tape splicing and roll changing position 2211, the full roll position 2212 or the unloading position 2213. The mentioned winding cylinder 2222 is a gas-liquid conversion cylinder, and the winding swing arm 221 swings smoothly through the gas-liquid conversion cylinder, while realizing the functions of tape splicing, roll changing and unloading.

[0045] On the basis of the foregoing, a further embodiment of the present invention is described with reference to Figures 3 and 4The roll-changing assembly 210 includes a roll-changing support body 211, a first winding rubber roller 212 and a second winding rubber roller 213. The roll-changing support body 211 is composed of two roll-changing slides 2110 that are upright and arranged inside and outside. The two roll-changing slides 2110 are tightened and fixed by a slide cross brace 2111. A linear guide pair 204 is vertically arranged on the inner winding wall panel 202. A slider is provided on the inner roll-changing slide 2110 to cooperate with the linear guide pair 204. Under the drive of the transmission mechanism 230, the roll-changing assembly 210 slides up and down relative to the winding wall panel 202. At the same time, the linear guide pair 204 is used to fix the roll-changing assembly 210 to ensure that the roll-changing assembly 210 slides up and down smoothly; the second winding rubber roller 213 and the first winding rubber roller 212 are arranged symmetrically up and down and the same end is passed through the first axis. The support 214 is fixed on the inner roll-changing slide 2110, and a driving component 215 is provided at the same protruding shaft position at the other end. When winding, it pulls the foil electrode 1 synchronously with the corresponding winding air shaft 222, and can discharge the air in the foil electrode 1 coil, compact the foil electrode 1 coil, and solve the problem that during high-speed winding, the air is more difficult to be effectively discharged, resulting in gaps inside the coil, insufficient winding tightness, and further causing quality problems such as slippage and end face staggering; the first / second winding rubber roller is close to the winding swing arm 221 at the tape splicing and roll-changing position 2211. A glue sensor 205 is provided on the side for detecting whether the winding air shaft 222 is in the tape splicing and roll-changing position 2211. The glue sensor 205 is fixed to the roll-changing slide through a bracket, and the glue sensor 205 is electrically connected to the control unit.

[0046] On the basis of the foregoing, a further embodiment of the present invention is described with reference to Figures 3 and 4 , a cutter mechanism 216 is provided below the first winding rubber roller 212 and above the second winding rubber roller 213. The cutter mechanism 216 includes a cutter assembly 2160, a cutter cylinder 2161 and a second bearing seat 2162. The second bearing seat 2162 is fixed on the inner roll-changing slide 2110. The cutter assembly 2160 includes a cutter body 21601 and a rotating shaft 21602. One end of the cutter body 21601 is provided with the rotating shaft 21602 that cooperates with the second bearing seat 2162, and the other end is a blade for cutting the electrode piece. One end of the cutter cylinder 2161 is connected to the rotating shaft 21602. When the glue sensor 205 detects that the winding shaft approaches the first / second winding rubber roller and is close to it, the control unit receives a close signal, controls the cutter cylinder 2161 to move, drives the rotating shaft 21602 to rotate, and the cutter cuts the foil electrode piece 1 to achieve roll changing.

[0047] In some implementations, the glue sensor 205 is fixed to the inner roll-changing slide 2110 via a bracket.

[0048] In some implementations, the transmission mechanism 230 includes a transmission rack 231 and a drive gear 232. The transmission rack 231 is vertically mounted on the inner winding wall panel 202, and the drive gear 232 is mounted on the inner roll-changing slide 2110. A transmission motor is provided on the drive gear 232, which drives the drive gear 232 to move on the transmission rack 231. In some implementations, both ends of the swing shaft 2221 are fixed between the two winding wall panels 202 via flanges.

[0049] In some implementation processes, reference Figure 5 As shown, a reel (not shown in the figure) is sleeved on the reeling inflatable shaft 222. The reeling inflatable shaft 222 is used to expand the reel and is fixed between a pair of rocker arms 2220 through a quick-release structure. The reeling inflatable shaft 222 is connected to the reeling motor 2224 through a synchronous belt 2223 for active reeling.

[0050] A further embodiment of the present invention is described with reference to Figure 2 and Figure 7 As shown, the traction mechanism 100 includes a traction roller assembly 104, a traction pressure roller assembly 1050, a traction base 101 and a traction wall plate 102. A traction wall plate 102 is fixed on the inner and outer sides of the traction base 101. The two traction wall plates 102 are tightened and positioned by a first cross brace 106; the traction roller assembly 104 includes a main drive roller 1041, a third bearing seat 1042 and a main cylinder 1043. The main drive roller 1041 is connected to the inner side of the traction base 101 through the third bearing seat 1042. The traction wall panel 102 is fixed, and the main driving roller 1041 is connected to the protruding end of the main cylinder 1043 to drive the foil pole piece 1; the traction pressure roller 1050 assembly 105 includes a pressure roller 1050, a rotating seat and a clamping cylinder. The pressure roller 1050 is fixed on the inner side of the traction wall panel 102 through the rotating seat, and the pressure roller 1050 is connected to the protruding end of the clamping cylinder. The pressure roller 1050 is driven by the clamping cylinder to clamp the foil pole piece 1, and the pressure roller 1050 cooperates with the main driving roller 1041 to pull the foil pole piece 1.

[0051] Further, refer to Figure 2 and Figure 7The traction mechanism 100 further includes a deflection correction component 107, which is mounted on the top of the traction wall panel 102. The foil pole piece 1 first passes through the deflection correction component 107 before passing through the traction roller assembly 104. A plurality of tension rollers 108 fixed to the traction wall panel 102 are further provided between the deflection correction component 107 and the traction pressure roller 1050 assembly 105. The deflection correction component 107 of the present invention is used to correct the foil pole piece 1 and prevent it from deviating. Two tension rollers 108 are rationally arranged according to the physical parameters of the traction wall panel 102. After passing through the deflection correction component 107, the foil pole piece 1 first passes through the first tension roller 108, then passes through the traction roller assembly 104 and the traction pressure roller 1050 assembly 105, and finally passes through the second tension roller 108. The tension rollers 108 are used to control the coiling speed of the foil pole piece 1 to ensure that no unwinding or wrinkling occurs.

[0052] Further, refer to Figure 2 and Figure 7 The traction mechanism 100 also includes a floating swing roller assembly 103 for detecting and controlling the winding tension. The winding tension value is collected by the tension sensor 1030, and the control unit processes the data and sends a control signal to control the action of the floating swing roller assembly 103 to obtain a suitable winding tension. The floating swing roller assembly 103 is arranged below the traction roller assembly 104. The foil electrode 1 passes through the traction roller assembly 104 and then passes through the floating swing roller assembly 103. The floating swing roller assembly 103 is provided with a plurality of supporting rollers 109 on the side close to the winding station. In some implementation processes, the present invention is provided with three supporting rollers 109, and the specific positions of the supporting rollers 109 are arranged according to the sizes of the two workstations, wherein two supporting rollers 109 are arranged on one side of the floating swing roller assembly 103, and the other supporting roller 109 is installed on the winding wall panel 202; after the foil electrode 1 passes through the second tension roller 108, it first passes through a supporting roller 109 and then passes through the floating swing roller assembly 103 and then passes through a supporting roller 109, and finally passes through the supporting roller 109 set on the winding wall panel 202, so that the foil electrode 1 can smoothly transition to the winding station.

[0053] In actual application, refer to Figure 8 and Figure 9, the two winding assemblies 220 of the present invention are arranged up and down and symmetrically, namely the upper winding assembly 220 and the lower winding assembly 220, the corresponding winding air shaft 222 set at the top is the winding B axis 20, and the three swings of the corresponding winding swing arm 221 are respectively the B axis tape change position 2211Ⅱ, the B axis full roll position 2212Ⅲ and the B axis unloading position 2213Ⅴ; the corresponding winding air shaft 222 set at the bottom is the winding A axis 10, and the three swings of the corresponding winding swing arm 221 are respectively the A axis tape change position 2211Ⅶ, the A axis full roll position 2212Ⅵ and the A axis unloading position 2213Ⅰ; start the machine, first the deviation correction assembly 107 corrects the foil pole piece 1, bypasses the tension roller 108, and passes through the traction roller assembly 104 The winding tension is controlled by the floating swing roller assembly 103 between the traction pressure roller 1050 assembly 105, bypassing the supporting roller 109, and then bypassing the supporting roller 109 of the traction station and then winding around the supporting roller 109 of the winding station, and then being wound onto the reel of the winding A / B axis by the roll changing assembly 210 and the winding assembly 220. The roll changing assembly 210 of the present invention is driven by the gear rack of the transmission mechanism 230 to realize reciprocation between the upper winding position IV and the lower winding position VIII on the linear guide pair 204. It can be seen that the turret-free roll changing mechanism 200 of the winding device of the present invention is different from the conventional turret-type roll changing structure in that the winding A axis 10 and the winding B axis 20 do not need to switch the position of the A / B axis by rotating the turret when changing the roll. The specific process of winding and changing the roll is as follows:

[0054] (1) The winding process of winding A axis 10 and winding B axis 20: refer to Figure 8 After the winding A shaft 10 is fully wound, the winding B shaft 20 is replaced. The winding A shaft 10 is at the A shaft unloading position I, and the roll-changing assembly 210 is driven by the gear rack of the transmission mechanism 230 from the lower winding position VIII to the upper winding position IV; during the rising process of the roll-changing assembly 210, the electrode piece detaches from the second winding rubber roller 213 and fits with the first winding rubber roller 212. At the same time, the winding B shaft 20 swings from the B shaft unloading position V to the B shaft reel-changing position II, triggering the cutter assembly 2160 to cut off the foil electrode piece 1 of the winding A shaft 10, and the tape on the winding drum of the winding B shaft 20 sticks to the foil electrode piece 1, thereby realizing the change from the winding A shaft 10 to the winding B shaft 20.

[0055] (2) The winding process of winding B axis 20 to change to winding A axis 10: refer to Figure 9When the winding B shaft 20 is fully wound, it swings from the B shaft full winding position III to the B shaft unloading position V, and the roll changing assembly 210 is driven by the gear rack of the transmission mechanism 230 to descend from the upper winding position IV to the lower winding position VIII; during the descent of the roll changing assembly 210, the electrode piece detaches from the first winding rubber roller 212 and fits with the second winding rubber roller 213; at the same time, the winding A shaft 10 swings from the A shaft unloading position I to the A shaft changing position VII, triggering the cutter assembly 2160 to cut off the B shaft foil electrode piece 1, and the tape on the winding drum of the winding A shaft 10 sticks to the foil electrode piece 1, thereby realizing the change from the winding B shaft 20 to the winding A shaft 10.

[0056] In the aforementioned roll-changing process, the roll-changing assembly 210, which has dual rewinding rubber rollers arranged vertically, achieves a fixed position during roll-changing, eliminating the need for lifting via a swing arm. This ensures the parallel accuracy of the dual rewinding rubber rollers and the dual reel-changing shafts, thereby avoiding poor bottoming during roll-changing and eliminating the safety hazards of manual bottom wrinkle removal. A compression-type active rewinding method is used between the rewinding rubber rollers and the rewinding shaft, reducing the amount of air introduced into the coil, making the rewinding more compact and avoiding problems such as rewinding slippage and end-face misalignment. At the same time, when the rewinding rubber rollers are in close contact with the rewinding spindle, wrinkles and bulges in the blank area of ​​the wide middle tab are effectively smoothed by the rewinding rubber rollers, improving the quality of the rewinding appearance and thereby increasing the yield rate of subsequent coating or slitting processes.

[0057] It is particularly noted that the deviation correction assembly 107, floating swing roller assembly 103, traction roller assembly 104, traction pressure roller 1050 assembly 105, tension roller 108, and support roller 109 described in the present invention can be adjusted to the corresponding layout according to different film feeding positions. The deviation correction assembly 107 can be before or after the traction roller, and the floating swing roller assembly 103 can be other forms of pole piece floating mechanisms. The turret-less structure can be a one-piece or one-piece double-station winding; the up-and-down layout of the winding A / B axis can also be changed to a left-and-right layout according to the structure, not limited to the up-and-down position; the gear rack in the transmission mechanism 230 of the roll changing assembly 210 can be realized by a transmission form such as a cylinder, an electric cylinder, or a screw; the first winding rubber roller 212 in the roll changing assembly 210 can be a winding pressure roller 1050 with a main drive, an approach roller, an exhaust roller, etc.; the winding swing arm 221 can be a horizontal push structure or an oblique push layout, not limited to the form of this embodiment.

Claims

1. A turret-free double-station automatic winding equipment for coating lithium battery foil, characterized by: It includes a traction mechanism located at the traction station and a turret-less reel-changing mechanism located at the reeling station. The traction station and the reeling station are arranged side by side. The foil electrode is first pulled by the traction mechanism into the turret-less reel-changing mechanism, and the reel-changing or reeling process is performed by the control unit. The turret-less roll-changing mechanism includes a winding base, a roll-changing assembly and a winding assembly. Winding wall panels are provided on both sides of the winding base. The two winding wall panels are tightened and positioned by wall panel cross braces. The roll-changing assembly is slidably mounted on the inner side of the winding wall panels. The roll-changing assembly is driven by a transmission mechanism to slide up and down relative to the inner side of the winding wall panels. The roll-changing assembly cooperates with a pair of winding assemblies arranged on its right side and symmetrically arranged up and down to complete winding and changing. The winding assembly includes a winding swing arm, a winding air shaft and a winding cylinder. The winding swing arm has three swing positions in its swing trajectory, which are, from left to right, a tape splicing and roll changing position, a full roll position and a material unloading position. The winding swing arm is composed of two oppositely arranged swing rods, a swing shaft is provided between the same ends of the two swing rods, two swing rods are passed through the two ends of the swing shaft and are fixed between the two winding wall panels, and the winding air shaft is provided between the other same ends of the two swing rods. Each swing rod is driven by one of the winding cylinders, and together they push a pair of swing rods to make the winding swing arm swing to the tape splicing and roll changing position, the full roll position or the material unloading position. The roll-changing assembly includes a roll-changing support body, a first winding rubber roller, and a second winding rubber roller. The roll-changing support body is composed of two vertically arranged roll-changing slides, which are tightened and fixed by a slide cross brace. A linear guide pair is vertically arranged on the inner side of the winding wall panel. A slider is provided on the roll-changing slide to cooperate with the linear guide pair. Under the drive of the transmission mechanism, the roll-changing assembly slides up and down relative to the winding wall panel; The second winding rubber roller and the first winding rubber roller are arranged symmetrically up and down and are fixed to the inner side of the roll-changing slide plate at the same end through the first bearing seat. The extending shaft position of the same other end is provided with a driving assembly, which pulls the foil electrode synchronously with the corresponding winding air shaft during winding; A glue sensor is provided on one side of the first / second winding rubber roller close to the winding swing arm at the tape splicing and roll changing position. The glue sensor is fixed to the roll changing slide via a bracket and is electrically connected to the control unit. A cutter mechanism is provided below the first winding rubber roller and above the second winding rubber roller. The cutter mechanism includes a cutter assembly, a cutter cylinder and a second bearing seat. The second bearing seat is fixed to the inner side of the roll-changing slide. The cutter assembly includes a cutter body and a rotating shaft. One end of the cutter body is provided with the rotating shaft that cooperates with the second bearing seat, and the other end is a blade for cutting the electrode piece. One end of the cutter cylinder is connected to the rotating shaft. When the glue sticking sensor detects that the winding air shaft approaches the first / second winding rubber roller and is pressed against it, the control unit receives a pressing signal, controls the action of the cutter cylinder, drives the rotating shaft to rotate, and the cutter cuts the electrode piece to realize roll changing. The winding device adopts a compacting active winding method, so that the winding rubber roller and the winding air shaft are tightly combined.

2. The turret-free double-station automatic winding equipment for coating lithium battery foil according to claim 1, characterized in that: The glue sensor is fixed on the inner side of the roll-changing slide plate through a bracket.

3. The turret-free double-station automatic winding equipment for coating lithium battery foil according to claim 1, characterized in that: The transmission mechanism includes a transmission rack and a driving gear. The transmission rack is vertically installed on the inner side of the winding wall panel. The driving gear is installed on the roll-changing slide. A transmission motor is provided on the driving gear. The transmission motor drives the driving gear to move on the transmission rack.

4. The lithium battery foil coating non-turret double-station automatic winding equipment according to claim 1, characterized in that: The two ends of the swing shaft are fixed between the two rolling wall panels through flanges.

5. The turret-free double-station automatic winding equipment for coating lithium battery foil according to claim 1, characterized in that: A reel is sleeved on the reeling air shaft, and the reeling air shaft is used to expand the reel and is fixed between a pair of rocker arms through a quick-release structure. The reeling air shaft is connected to a reeling motor through a synchronous belt for active reeling.

6. The turret-free double-station automatic winding equipment for coating lithium battery foil according to claim 1, characterized in that: The traction mechanism includes a traction roller assembly, a traction pressure roller assembly, a traction base and a traction wall panel. A traction wall panel is fixed on both sides of the traction base, and the two traction wall panels are tightened and positioned by a first cross brace; the traction roller assembly includes a main drive roller, a third bearing seat and a main cylinder. The main drive roller is fixed to the inner side of the traction wall panel through the third bearing seat, and the main drive roller is connected to the protruding end of the main cylinder to drive the foil; the traction pressure roller assembly includes a pressure roller, a rotating seat and a pressing cylinder. The pressure roller is fixed to the inner side of the traction wall panel through the rotating seat, and the pressure roller is connected to the protruding end of the pressing cylinder. The pressure roller is driven by the pressing cylinder to press the foil, and the pressure roller cooperates with the main drive roller to pull the foil.

7. The turret-free double-station automatic winding equipment for coating lithium battery foil according to claim 6, characterized in that: The traction mechanism also includes a correction component, which is installed on the top of the traction wallboard. The foil passes through the correction component before passing through the traction roller assembly. Several tension rollers fixed to the traction wallboard are also provided between the correction component and the traction pressure roller assembly.

8. The turret-free double-station automatic winding equipment for coating lithium battery foil according to claim 7, characterized in that: The traction mechanism also includes a floating swing roller assembly for detecting and controlling the winding tension. The floating swing roller assembly is arranged below the traction roller assembly. The foil pole piece passes through the traction roller assembly and then passes through the floating swing roller assembly. The floating swing roller assembly is provided with a plurality of supporting rollers on the side close to the winding station.

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