High-speed stable accurate cutting equipment for aluminum foil of lithium battery

Abstract

The utility model relates to the technical field of lithium battery manufacturing equipment, and discloses lithium battery aluminum foil high-speed stable accurate cutting equipment which comprises a PLC (programmable logic controller), an accurate cutting winding device and an unwinding device, the accurate cutting and winding device comprises a rack and a plurality of winding servo motors; the rolling servo motors are arranged on the rack; the upper winding roller, the lower winding roller, the multiple fixing rollers used for being connected with the machine frame and the fine cutting assembly are arranged in the machine frame in parallel and matched with one another. Through multi-aspect structural improvement, the unwinding device and the fine cutting winding device are separated, so that the problems of complex structure and difficulty in maintenance caused by integration of unwinding and fine cutting equipment are solved; and through mutual cooperation of the PLC, the servo motor, the tension sensors, the edge correcting assembly and the precise cutting assembly, the stability and precision during high-speed slitting of the aluminum foil are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing equipment, in particular to a high-speed, stable and precise cutting device for lithium battery aluminum foil. Background Art

[0002] Lithium battery aluminum foil often has unstable tension during the slitting process, with tension fluctuating around 15N. Excessive tension fluctuations can easily cause damage to the lithium battery aluminum foil; even slight strains can damage the surface structure of the lithium battery aluminum foil, and strains and scratches will cause a significant decrease in battery capacity and battery life in the later stage; severe strains can cause the entire roll of material to be scrapped, and the cost of scrapping a roll of lithium battery aluminum foil is between 30,000 and 50,000 yuan, or even higher; the cutting method in the existing technology has low precision and uneven incisions due to large tension fluctuations, and is also prone to local stretching of materials, resulting in waste; the slitting process has a low degree of automation, requires manual intervention, is complex to operate, and is inefficient. The general aluminum foil slitting speed is about 250m / min; the equipment structure is complex, maintenance is difficult, and the failure rate is high.

[0003] For example, in the prior art, Chinese utility model patent document CN217476119U discloses an aluminum foil slitting device, which is provided with a box unit, a slitting knife unit provided in the box unit and used for cutting aluminum foil, and a collecting roller unit provided on the box unit and used for classifying and storing the cut aluminum foil. Although the prior art sets the collecting roller unit to achieve the technical effect of storing the slit aluminum foil in batches, its cutting has problems of uneven incisions and stretched incisions; it realizes the batch storage of the slit aluminum foil by setting two front and rear collecting rollers, and cuts the aluminum foil by rotary cutting to facilitate the storage work, but this cutting method has low precision and large errors, and also causes material waste in cutting; the equipment is also prone to problems such as aluminum foil tearing when used in conjunction with the unwinding unit, and is not suitable for high-precision, high-speed precision cutting scenarios.

[0004] In summary, existing lithium battery aluminum foil slitting equipment has problems such as complex equipment structure, unstable slitting tension, slow cutting speed, low precision, low degree of automation, inconvenient operation, and inability to display equipment status. These problems make it difficult to meet the demand for high-speed, high-precision, and high-efficiency lithium battery aluminum foil slitting, which reduces the consistency of the final lithium battery production. Therefore, there is an urgent need to develop a high-speed, stable, and precise cutting equipment for lithium battery aluminum foil. Summary of the Invention

[0005] The purpose of the utility model is to provide a high-speed and stable precision cutting equipment for lithium battery aluminum foil, which is designed to be split into a unwinding device and a precision cutting and rewinding device, and through various structural improvements, to solve the problems of complex structure and difficult maintenance caused by the integration of unwinding and precision cutting equipment in the above-mentioned background technology, as well as the problems of slow speed, poor stability and low precision during high-speed slitting of aluminum foil, so as to meet the high-speed, high-precision and high-efficiency slitting requirements of lithium battery aluminum foil and improve the consistency of the final production of lithium batteries.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A high-speed and stable precision cutting device for lithium battery aluminum foil, comprising a PLC controller and a precision cutting rewinding device and an unwinding device that work in conjunction with each other and are designed in a split manner;

[0008] The precision cutting and winding device includes a frame, a plurality of winding servo motors; each winding servo motor is arranged on the frame; the device also includes an upper winding roller, a lower winding roller, a plurality of fixed rollers for connecting to the frame, and a precision cutting assembly, which are arranged inside the frame and cooperate with each other and are arranged in parallel; the upper winding roller and the lower winding roller are arranged in cooperation; each fixed roller is arranged horizontally on the inner side of the top of the frame; the precision cutting assembly is arranged on one of the fixed rollers, and the precision cutting assembly is arranged parallel to the fixed roller; the precision cutting assembly includes a knife shaft and at least one slitting knife arranged on the knife shaft;

[0009] The unwinding device includes an unwinding roller for loading lithium battery aluminum foil, an unwinding tension sensing roller, and multiple unwinding servo motors; the unwinding roller and the unwinding tension sensing roller are respectively located parallel to the inner ends of the unwinding device, and the unwinding roller is connected to the unwinding servo motor in a transmission manner; the lithium battery aluminum foil output by the unwinding device passes through the unwinding tension sensing roller and enters the precision cutting and rewinding device;

[0010] The PLC controller is electrically connected to each winding servo motor of the precision cutting and winding device and each unwinding servo motor of the unwinding device.

[0011] Furthermore, the precision cutting and winding device also includes a mechanical box arranged on the left side of the frame, an electrical control box and a control panel arranged on the right side of the frame; the mechanical box and the electrical control box are arranged in parallel, and the PLC controller is arranged in the electrical control box; the control panel is arranged on the front side of the electrical control box, the control panel is electrically connected to the PLC controller, and the control panel also includes a display screen and control buttons.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this application separates the unwinding device and the precision cutting and rewinding device. Through the split design and other structural improvements, the PLC controller, servo motor, various tension sensors, edge correction components, precision cutting components, etc. cooperate with each other. On the one hand, it solves the problem of complex structure and difficult maintenance caused by the integration of unwinding and precision cutting equipment; on the other hand, it solves the problems of slow speed, poor stability and low precision during high-speed slitting of aluminum foil. It can meet the high-speed, high-precision and high-efficiency slitting needs of lithium battery aluminum foil, and improves the consistency of the final lithium battery products produced.

[0014] 2. The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this application replaces the three-phase asynchronous motor in the traditional equipment with a servo motor, thereby improving the speed, efficiency and stability of slitting. During the high-speed precision cutting process, the incision size of the aluminum foil is made uniform, and the maximum precision cutting speed can reach 300m / min, which is better than the traditional precision cutting speed of 250m / min. It can simultaneously ensure the stability and accuracy of slitting, and solve the problems of high failure rate, large tension fluctuation and slow speed of traditional three-phase asynchronous motor slitting equipment.

[0015] 3. The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this application ensures the stable tension of the output lithium battery aluminum foil by setting an unwinding tension sensing roller on the unwinding device; the lithium battery aluminum foil can also remain flat during the cutting process, avoiding cutting deviation and improving cutting accuracy. Combined with the set edge correction component to ensure high-precision cutting, the energy storage effect of the lithium battery aluminum foil after cutting is greatly improved.

[0016] 4. The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this application ensures that the structure of the lithium battery aluminum foil is not damaged by tension after cutting by setting tension sensors in conjunction with the upper and lower winding shafts in the precision cutting and winding device, thereby improving the service life of the lithium battery aluminum foil.

[0017] 5. The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this application is equipped with a PLC controller and a control panel, which makes the operation simple and convenient, and has a high degree of automation. By being equipped with a display instrument, the working status of the equipment and multiple working parameters can be displayed in detail, which is convenient for staff to monitor and adjust, and can ensure the stability of the performance of the precision cutting equipment when working for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the lithium battery aluminum foil high-speed and stable precision cutting equipment according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the main structure of the high-speed and stable precision cutting equipment for lithium battery aluminum foil according to an embodiment of the present utility model;

[0021] Figure 3 This is a rear structural schematic diagram of the high-speed and stable precision cutting equipment for lithium battery aluminum foil according to an embodiment of the present utility model;

[0022] Figure 4 This is a left-side structural schematic diagram of a high-speed, stable, and precise cutting device for lithium battery aluminum foil according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the right side structure of the high-speed and stable precision cutting equipment for lithium battery aluminum foil according to an embodiment of the present utility model;

[0024] Figure 6 This is a schematic top view of the structure of the high-speed and stable precision cutting equipment for lithium battery aluminum foil according to an embodiment of the present utility model;

[0025] Figure 7 This is a bottom-up structural schematic diagram of a high-speed, stable, and precise cutting device for lithium battery aluminum foil according to an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the precision cutting control process of the high-speed and stable precision cutting equipment for lithium battery aluminum foil according to an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 1. Precision cutting and rewinding device; 2. Unwinding device; 3. Precision cutting assembly; 4. Control panel; 5. Instrument display area; 11. Mechanical box; 12. Electric control box; 13. Upper rewinding roller; 14. Lower rewinding roller; 15. Fixed roller; 16. Adjustment support; 20. Edge correction assembly; 21. Unwinding tension sensing roller; 22. Lithium battery aluminum foil; 23. Unwinding power roller; 24. Cylinder; 25. Magnetic powder controller; 26. Unwinding roller; 27. Auxiliary roller. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figures 1 to 7 The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided by the utility model is a targeted improvement to the problems existing in the existing integrated lithium battery aluminum foil precision cutting equipment. It includes a PLC controller and a precision cutting rewinding device 1 and an unwinding device 2 that work in conjunction with each other and are designed in a split manner.

[0032] The precision cutting and winding device 1 includes a frame, a plurality of winding servo motors; each winding servo motor is arranged on the frame; and further includes: an upper winding roller 13, a lower winding roller 14, a plurality of fixed rollers 15 for connecting to the frame, and a precision cutting assembly 3, which are arranged inside the frame and cooperate with each other and are arranged in parallel; the upper winding roller 13 and the lower winding roller 14 are arranged in cooperation with each other; each fixed roller 15 is arranged horizontally on the inner side of the top of the frame; the precision cutting assembly 3 is arranged on one of the fixed rollers 15, and the precision cutting assembly 3 is arranged parallel to the fixed roller 15; the precision cutting assembly 3 includes a knife shaft and at least one slitting knife arranged on the knife shaft;

[0033] The unwinding device 2 includes an unwinding roller 26 for loading the lithium battery aluminum foil 22, an unwinding tension sensing roller 21, and multiple unwinding servo motors. The unwinding roller 26 and the unwinding tension sensing roller 21 are respectively located parallel to each other at the two ends of the unwinding device 2, and the unwinding roller 26 is connected to the unwinding servo motor. The lithium battery aluminum foil 22 output from the unwinding device 2 passes through the unwinding tension sensing roller 21 and enters the precision cutting and rewinding device 1.

[0034] The PLC controller is electrically connected to each winding servo motor of the precision cutting and winding device 1 and each unwinding servo motor of the unwinding device 2. The PLC controller realizes process coordinated control and process parameter adjustment of the precision cutting and winding device 1 and the unwinding device 2 by adjusting each unwinding servo motor.

[0035] The precision cutting and winding device 1 also includes a mechanical box 11 arranged on the left side of the frame, an electrical control box 12 arranged on the right side of the frame, and a control panel 4; the mechanical box 11 and the electrical control box 12 are arranged in parallel, and the PLC controller is arranged in the electrical control box 12; the control panel 4 is arranged on the front side of the electrical control box 12, and the control panel 4 is electrically connected to the PLC controller. The control panel 4 also includes a display screen and control buttons for staff to observe and operate; the staff can set or modify the operating program and working parameters of the PLC controller through the control panel 4.

[0036] The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this embodiment achieves the effects of simplifying the equipment structure, reducing the failure rate and facilitating maintenance and repair through split design and various structural improvements to other parts; by arranging various tension sensing rollers and tension sensors in the precision cutting and rewinding device, the tension changes of unwinding and rewinding can be monitored in real time, and the signal is transmitted to the PLC controller; the PLC controller adjusts the speed of the servo motor in real time according to the tension signal, combined with the PID algorithm of the prior art, to accurately control the tension of the upper and lower rewinding shafts to keep it within the set range, realize closed-loop control, ensure that the structure of the lithium battery aluminum foil after cutting is not damaged by tension, and improve the service life of the lithium battery aluminum foil; it generally solves the problems of slow speed, poor stability and low precision in high-speed slitting of aluminum foil, can meet the high-speed, high-precision and high-efficiency slitting requirements of lithium battery aluminum foil, and improves the consistency of lithium battery products finally produced by the slitting aluminum foil.

[0037] Example 2

[0038] See also Figures 1 to 7 This embodiment further improves upon Example 1. Each winding servo motor is housed within a mechanical box 11 and is connected to an upper winding roller 13 and a lower winding roller 14, respectively. Each upper winding roller 13 and lower winding roller 14 is equipped with a tension sensor, which is electrically connected to a PLC controller. The winding servo motor is typically directly connected to each winding power roller 14 via a shaft. However, for more complex scenarios, gears, chains, or other transmission connections may also be used.

[0039] The electrical control box 12 also includes an instrument display area 5, which is arranged above the control panel 4; the instrument display area 5 includes a plurality of instruments arranged therein, specifically a rewinding tension display instrument, a rewinding speed monitoring instrument, a rewinding servo motor status instrument, an upper rewinding tension display instrument, and a lower rewinding tension display instrument, and each of the instruments is electrically connected to the PLC controller.

[0040] The electric control box 12 also includes two adjustable supports 16 for adjusting the stability of the rack, which are both arranged on the outside of the bottom of the electric control box 12. The adjustable supports 16 can fine-tune the horizontality of the rack to avoid abnormal vibration caused by uneven force on the rack.

[0041] The unwinding device 2 further includes a plurality of unwinding power rollers 23 ; each of the unwinding power rollers 23 is arranged in parallel with the unwinding roller 26 and the unwinding tension sensing roller 21 ; each of the unwinding power rollers 23 is respectively connected to the unwinding servo motor in a transmission manner.

[0042] The unwinding device 2 further includes an edge correction component 20, which is arranged at the discharge port position below the unwinding power roller 23; the edge correction component 20 is electrically connected to the PLC controller and ensures the transportation accuracy of the aluminum foil under the control of the PLC controller.

[0043] The unwinding device 2 also includes multiple auxiliary rollers 27 and multiple cylinders 24. Each auxiliary roller 27 is arranged in parallel with the unwinding roller 26 and the unwinding tension sensing roller 21; each auxiliary roller 27 is connected to the unwinding servo motor; and the cylinder 24 is arranged on the outside of both ends of the auxiliary roller 27.

[0044] The unwinding device 2 also includes a magnetic powder controller 25 for braking. This controller is located at one end of the unwinding roller 26 and is electrically connected to a programmable logic controller (PLC). The cylinders 24, the unwinding servo motor, and the magnetic powder controller 25 are all controlled by the PLC. In an emergency, they coordinate with each other to brake the battery, preventing damage to the lithium battery foil 22.

[0045] In this embodiment, the adjustable distance between the unwinding device 2 and the precision-cutting and rewinding device 1 is 2m-5m, which can be specifically selected according to the design of the production line and the strength of the aluminum foil.

[0046] See also Figures 1 to 8 The high-speed and stable precision cutting equipment for lithium battery aluminum foil provided in this embodiment has undergone many aspects of structural improvement design. The three-phase asynchronous motor in the traditional equipment is replaced by a servo motor, and the servo motor is automatically adjusted by the PLC controller to move at a uniform speed. During the precision cutting process, the size of the cut surface is uniform and consistent, and the maximum precision cutting speed can reach 300m / min, which is better than the traditional precision cutting speed of 250m / min, and the precision cutting accuracy is also improved synchronously; by arranging an unwinding tension sensing roller in the unwinding device, the tension of the lithium battery aluminum foil during the transmission process is guaranteed to be stable, and the lithium battery aluminum foil can also be kept flat during the cutting process, avoiding cutting deviation and improving cutting accuracy. It can also be further combined with the set edge correction component to enable the equipment to maintain high cutting precision under long-term working conditions, greatly improving the consistency of the lithium battery aluminum foil after cutting. The high-speed and stable precision cutting equipment for lithium battery aluminum foil of this embodiment can ensure, through actual testing, that the tension fluctuation is controlled within ±2N during high-speed precision cutting, so that the lithium battery aluminum foil can pass through the slitting process intact, and can ensure that the internal structure of the lithium battery aluminum foil after slitting is not damaged by tension, thereby avoiding the problems of traditional slitting tension fluctuations of around 15N that easily damage the lithium battery aluminum foil, causing unexpected shutdowns, and poor consistency of subsequently manufactured lithium batteries.

[0047] See also Figure 8 The PLC controller of the lithium battery aluminum foil high-speed and stable precision cutting equipment in this embodiment controls the working process of the servo motor as follows:

[0048] (1) Control bus 5V analog circuit: The bus controller sends 5V cross analog voltage to control the servo motor to output constant torque and ensure that the servo motor does not jitter.

[0049] (2) Control bus differential circuit: The bus 5V differential circuit outputs a high-frequency short pulse square wave to control the high-speed rotation of the servo motor and ensure the high-speed stability of the servo motor.

[0050] (3) Control the dual PID closed-loop control circuit: the first layer of PID controls the lithium battery aluminum foil to rotate at high speed without shaking, and the second layer of PID controls the tension fluctuation of the lithium battery aluminum foil within ±2N to ensure that the lithium battery aluminum foil is not damaged.

[0051] The main working process of the lithium battery aluminum foil high-speed stable precision cutting equipment of this embodiment of the invention is as follows:

[0052] (1) The unwinding device transfers the lithium battery aluminum foil with stable tension to the precision cutting and winding device. The precision cutting and winding device first cuts the front section of the lithium battery aluminum foil material into two parts according to about 10 meters. The left part is wound on the upper winding roller position, and the right part is wound on the lower winding roller position.

[0053] (2) When the start button is pressed on the control panel, the upper winding roller and the lower winding roller begin to rotate, and the unwinding power roller also begins to rotate the slitting knife. At the same time, the lithium battery aluminum foil is transported to the dynamic slitting knife position and is cut and fed to the upper winding roller and the lower winding roller respectively to continue cutting the lithium battery aluminum foil and winding the lithium battery aluminum foil.

[0054] (3) Optimize the control process and replace the traditional motor in the equipment with a bus servo motor, which has faster speed, stronger anti-interference ability and higher stability; cooperate with the PLC controller, preset two control modes to control all servo motors, and use two existing PID algorithms and tension sensors to perform closed-loop control of the upper and lower winding shafts, ensuring the stability of operation and also ensuring that the aluminum foil will not be damaged.

[0055] In summary, the above embodiments of the present invention focus on the split design of the unwinding device and the precision cutting and rewinding device and other improvements, which reduce the structural complexity of the precision cutting equipment, and adopt the PLC controller, servo motor, and various tension sensors to work together to realize precise automatic control of unwinding, slitting, and rewinding, ensuring that the various components work in coordination with each other; a control panel is set, which is simple and convenient to operate; equipped with display instruments, the working status of the equipment can be displayed in detail, ensuring the stable operation of the precision cutting equipment; by setting various tension sensors in the precision cutting and rewinding device, the tension changes of the upper and lower rewinding shafts can be monitored in real time, and the signals are transmitted to the PLC controller; the PLC controller adjusts the servo motor speed in real time according to the signals of each tension sensor and combines the PID algorithm to accurately control the tension of the upper and lower rewinding shafts to keep it within the set range, realizing closed-loop control, ensuring that the lithium battery aluminum foil structure after cutting is not damaged by tension, and improving the service life and quality consistency of the lithium battery aluminum foil.

[0056] The applicant has conducted a small-scale trial production of the prototype of the high-speed, stable, and precise cutting equipment for lithium battery aluminum foil provided in the above embodiment of the present utility model under confidentiality, and has applied it to a lithium battery aluminum foil production enterprise. The enterprise has an annual output of 1,000 tons of lithium battery aluminum foil, and currently has a 5% scrap rate due to damage to the lithium battery aluminum foil. After applying the high-speed, stable, and precise cutting equipment for lithium battery aluminum foil provided in this embodiment, according to actual measurements, the scrap rate due to damage has been reduced to 1%, and the precise cutting efficiency has been improved by about 15%. The amount of scrapped lithium battery aluminum foil is reduced by 40 tons each year, which directly increases the economic benefits by 1.2 million yuan at a price of 30,000 yuan per ton. The high-speed, stable, and precise cutting equipment for lithium battery aluminum foil provided by the present utility model effectively solves the problems of both process and product quality, can increase the service life of the lithium battery aluminum foil after slitting, and improve the consistency and other performance of lithium batteries manufactured from the lithium battery aluminum foil, making the product more competitive in the market.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-speed and stable precision cutting equipment for lithium battery aluminum foil, characterized in that: It includes a PLC controller and a precision cutting and rewinding device (1) and an unwinding device (2) that work in conjunction with each other and are of split design; The precision cutting and winding device (1) comprises a frame, a plurality of winding servo motors; each winding servo motor is arranged on the frame; and further comprises: an upper winding roller (13), a lower winding roller (14), a plurality of fixed rollers (15) for connecting the frame, and a precision cutting component (3) arranged inside the frame and cooperating with each other and arranged in parallel; the upper winding roller (13) and the lower winding roller (14) are arranged in cooperation; each fixed roller (15) is arranged horizontally on the inner side of the top of the frame; the precision cutting component (3) is arranged on one of the fixed rollers (15), and the precision cutting component (3) is arranged parallel to the fixed roller (15); the precision cutting component (3) comprises a knife shaft and at least one slitting knife arranged on the knife shaft; The unwinding device (2) comprises an unwinding roller (26) for loading the lithium battery aluminum foil (22), an unwinding tension sensing roller (21), and a plurality of unwinding servo motors; the unwinding roller (26) and the unwinding tension sensing roller (21) are respectively located parallel to the inner ends of the unwinding device (2), and the unwinding roller (26) is connected to the unwinding servo motor in a transmission manner; the lithium battery aluminum foil (22) output by the unwinding device (2) passes through the unwinding tension sensing roller (21) and enters the precision cutting and rewinding device (1); The PLC controller is electrically connected to each winding servo motor of the precision cutting and winding device (1) and each unwinding servo motor of the unwinding device (2).

2. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 1 is characterized in that: The precision cutting and winding device (1) further comprises: a mechanical box (11) arranged on the left side of the frame, an electric control box (12) arranged on the right side of the frame, and a control panel (4); the mechanical box (11) and the electric control box (12) are arranged in parallel, and the PLC controller is arranged in the electric control box (12); the control panel (4) is arranged on the front side of the electric control box (12), the control panel (4) is electrically connected to the PLC controller, and the control panel (4) further comprises a display screen and control buttons.

3. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 2, characterized in that: Each of the winding servo motors is arranged in a mechanical box (11), and each of the winding servo motors is respectively connected to an upper winding roller (13) and a lower winding roller (14); each of the upper winding roller (13) and the lower winding roller (14) is provided with a tension sensor; and the tension sensor is electrically connected to a PLC controller.

4. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 2, characterized in that: The electric control box (12) further comprises an instrument display area (5), and the instrument display area (5) is arranged above the control panel (4); the instrument display area (5) comprises a plurality of instruments arranged therein, specifically an unwinding tension display instrument, a winding speed monitoring instrument, a winding servo motor status instrument, an upper winding tension display instrument, and a lower winding tension display instrument, and each of the instruments is electrically connected to the PLC controller.

5. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to any one of claims 2 to 4, characterized in that: The electric control box (12) further comprises two upwardly and downwardly adjustable adjustment supports (16) for adjusting the stability of the frame, and the adjustment supports (16) are both arranged on the outside of the bottom of the electric control box (12).

6. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 1, characterized in that: The unwinding device (2) further comprises a plurality of unwinding power rollers (23); each of the unwinding power rollers (23) is arranged in parallel with the unwinding roller (26) and the unwinding tension sensing roller (21); and each of the unwinding power rollers (23) is respectively connected to the unwinding servo motor in a transmission manner.

7. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 6, characterized in that: The unwinding device (2) further comprises an edge correction component (20), which is arranged at a discharge port below the unwinding power roller (23) and is electrically connected to a PLC controller.

8. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 1, characterized in that: The unwinding device (2) further comprises a plurality of auxiliary rollers (27) and a cylinder (24), wherein each auxiliary roller (27) is arranged in parallel with the unwinding roller (26) and the unwinding tension sensing roller (21); each auxiliary roller (27) is connected to the unwinding servo motor by transmission; and the cylinder (24) is arranged on the outside of both ends of the auxiliary roller (27).

9. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 1, characterized in that: The unwinding device (2) further includes a magnetic powder controller (25) for braking. The magnetic powder controller (25) is arranged at one end of the unwinding roller (26). The magnetic powder controller (25) is electrically connected to the PLC controller.

10. The high-speed and stable precision cutting equipment for lithium battery aluminum foil according to claim 1, characterized in that: The adjustable distance between the unwinding device (2) and the precision-cutting and rewinding device (1) is 2m-5m.

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