Battery pole piece winding tension intelligent control system

Abstract

The application belongs to the technical field of lithium battery manufacturing, and particularly relates to a battery pole piece winding tension intelligent control system, which comprises a unwinding module, a tension detection module, an intelligent control module, an execution module, a floating roller buffer module and a communication module; the intelligent control module calculates a current winding diameter and a change rate thereof in real time, outputs a basic tension setting value according to a winding diameter interval, calculates a final tension setting value through a taper tension fusion formula in combination with a pole piece elastic modulus and a thickness, introduces a winding diameter change rate to correct a tension deviation to obtain a correction deviation, and takes the correction deviation and a change rate thereof as inputs to perform online PID parameter setting through fuzzy reasoning and output control quantity; the execution module adjusts unwinding and winding tension. Through cascaded coupling control of winding diameter feedforward, material characteristic feedforward and fuzzy self-adaptive PID correction deviation, the application realizes effective suppression of dynamic disturbance and self-adaptive adjustment of tension, and improves winding precision and system stability.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery manufacturing technology, specifically relating to an intelligent control system for battery electrode winding tension. Background Technology

[0002] In the lithium battery manufacturing process, the cell winding process involves precisely winding the positive electrode sheet, separator, and negative electrode sheet into a cell according to a set sequence and tension. The winding quality directly determines the battery's capacity, safety, and cycle life. The electrode sheets (usually copper or aluminum foil substrates with a thickness between 8μm and 30μm) are thin and have low tensile strength, making tension control during the winding process crucial to the cell quality.

[0003] Prior art CN107195980A discloses a winding system and a lithium battery winding method for a lithium battery winding machine. The winding system includes a winding module and a stretching module. The winding module winds lithium battery electrodes into circular cells; the stretching module stretches the circular cells into square cells. This invention also provides a lithium battery winding method. The winding system for a lithium battery winding machine provided by this invention improves the winding shaft of a square winding machine, thereby achieving high-speed circular winding of lithium battery electrodes to form circular cells, and then stretching the circular cells into square cells. The above adopts a post-processing adjustment strategy, requiring the electrodes to be wound into cores first, then the cores to be charged and discharged while detecting pressure changes in the inner and outer layers, and then the tension adjusted during the next winding. This is an offline adjustment between batches, unable to compensate for instantaneous disturbances generated during the winding process of the same roll of electrodes in real time, resulting in significant control lag.

[0004] Therefore, a smart control system for battery electrode winding tension is provided to achieve real-time suppression of dynamic disturbances and integrate multi-dimensional feedforward compensation to achieve high-precision and adaptive tension control. Summary of the Invention

[0005] In view of the above-mentioned shortcomings in the prior art, the present invention provides an intelligent control system for battery electrode winding tension to solve the problems in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A smart control system for battery electrode winding tension includes: Unwinding module, used to load and drive the unwinding of electrode material rolls; The tension detection module is used to detect the operating tension of the electrode in real time and generate the actual tension value; The intelligent control module is used to calculate the current roll diameter and roll diameter change rate in real time; output the basic tension setpoint according to the range of the current roll diameter; calculate the final tension setpoint according to the current roll diameter, basic tension setpoint, electrode elastic modulus and electrode thickness; calculate the correction deviation according to the final tension setpoint, actual tension value and roll diameter change rate; and use the correction deviation and correction deviation change rate as input to tune the PID parameters online through fuzzy inference and output the control quantity. An execution module is used to receive the control quantity to adjust the unwinding tension and the winding tension; The communication module is used to enable data interaction between the intelligent control module and the upper-level monitoring system.

[0007] Furthermore, the intelligent control module calculates the final tension setpoint using the following formula: , in, The final tension setting value, The base tension setting value, The taper coefficient, The current volume diameter, Maximum roll diameter The diameter of the core is... This is an empirical correction factor. The elastic modulus of the electrode is... The thickness is the electrode thickness.

[0008] Furthermore, the intelligent control module calculates the correction deviation using the following formula: , in, To correct the deviation, This is the actual tension value. This is the compensation coefficient for the rate of change in roll diameter. This represents the rate of change in roll diameter.

[0009] Furthermore, the intelligent control module also includes a data monitoring and self-diagnosis unit, which is used to calculate the root mean square error of the deviation between the final tension set value and the actual tension value in real time. When the root mean square error exceeds a first threshold, an alarm is triggered, and when it exceeds a second threshold, an emergency stop is triggered.

[0010] Furthermore, the unwinding module includes an unwinding shaft, an unwinding drive device, and an unwinding encoder; The unwinding shaft is used to load the electrode roll to be wound and drive the roll to rotate to achieve unwinding; The unwinding drive device is used to provide unwinding power and adjust unwinding tension; The unwind encoder is used to detect the rotational speed of the unwinding shaft in real time and feed the unwinding speed signal back to the intelligent control module.

[0011] Furthermore, the tension detection module includes a first tension sensor, a second tension sensor, and a signal conditioning circuit; The first tension sensor is used to detect the tension of the electrode sheet at the guide roller behind the unwinding shaft and outputs a differential millivolt signal proportional to the tension. The second tension sensor is used to detect the tension of the electrode sheet at the guide roller in front of the take-up shaft and outputs a differential millivolt signal proportional to the tension. The signal conditioning circuit is used to amplify and filter the differential millivolt signals output by the first tension sensor and the second tension sensor, and convert them into standard analog voltage signals of 0~10V for acquisition by the analog input port of the intelligent control module.

[0012] Furthermore, it also includes a floating roller buffer module, which is disposed between the unwinding module and the tension detection module to absorb instantaneous tension impacts and simultaneously feed back the floating roller position signal to the intelligent control module to assist in adjusting the unwinding speed.

[0013] Furthermore, the execution module includes an unwinding side execution unit and a rewinding side execution unit; The unwinding-side execution unit is used to receive the unwinding-side component of the control quantity output by the intelligent control module. The take-up side execution unit is used to receive the take-up side component of the control quantity output by the intelligent control module.

[0014] Furthermore, the communication module is connected to the host monitoring system via an Ethernet interface to download electrode process parameters and upload real-time tension curves, alarm records, and winding quality data.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Fuzzy adaptive PID control is adopted, and a correction deviation mechanism is designed to introduce the roll diameter change rate into the PID input deviation, enabling the controller to predict tension fluctuations caused by sudden changes in roll diameter. This significantly improves the dynamic response speed and steady-state accuracy of tension control, and effectively reduces overshoot and settling time.

[0016] 2. By feeding forward the roll diameter and material properties (elastic modulus, thickness) into the tension setpoint calculation, and then inputting it into the fuzzy PID after deviation correction, a high-performance control structure with feedforward dominance and feedback fine-tuning is formed, which greatly improves the system's ability to suppress dynamic disturbances such as roll eccentricity and speed fluctuations.

[0017] 3. By adopting segmented tension planning and tapered tension integration, quality problems such as inner tightness and outer looseness or inner layer collapse can be avoided.

[0018] 4. By calculating the root mean square error of tension deviation in real time, timely alarm and emergency shutdown protection for tension abnormalities are realized, effectively reducing the risk of electrode breakage caused by tension abnormalities. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a system diagram of an intelligent control system for battery electrode winding tension according to the present invention. Detailed Implementation

[0021] Please see Figure 1 This invention provides an intelligent control system for battery electrode winding tension, including an unwinding module, a tension detection module, an intelligent control module, an execution module, a floating roller buffer module, and a communication module; it solves the problems of lagging tension control and poor dynamic disturbance suppression capability in existing systems.

[0022] Furthermore, the unwinding module is used to load and drive the electrode sheet roll to unwind; the unwinding module includes an unwinding shaft, an unwinding drive device, and an unwinding encoder; wherein: The unwinding shaft is used to load the electrode roll to be wound and drive the roll to rotate to achieve unwinding; The unwinding drive device is composed of an unwinding servo motor and a magnetic powder brake. The output shaft of the unwinding servo motor is connected to the unwinding shaft through a coupling. The rotor of the magnetic powder brake is coaxially mounted with the unwinding shaft and is used to provide unwinding power and adjust unwinding tension. The unwind encoder is installed at the end of the unwind shaft and is used to detect the rotational speed of the unwind shaft in real time and feed back the unwind speed signal to the intelligent control module.

[0023] In this embodiment, during initialization, the unwinding servo motor of the unwinding drive device rotates at a preset initial speed, and the magnetic powder brake applies an initial braking torque to draw the electrode sheet off the coil. During the winding process, the unwinding encoder detects the unwinding shaft speed in real time and outputs a pulse frequency to the intelligent control module. According to the speed compensation command issued by the intelligent control module, the unwinding servo drive adjusts the motor speed. At the same time, the magnetic powder brake changes its braking torque according to the control signal of the excitation current drive circuit. The two work together to stabilize the unwinding tension near the target value.

[0024] Furthermore, the tension detection module is used to detect the operating tension of the electrode sheet in real time and generate the actual tension value; the tension detection module includes a first tension sensor, a second tension sensor, and a signal conditioning circuit; wherein: The first tension sensor is used to detect the tension of the electrode sheet at the guide roller behind the unwinding shaft and outputs a differential millivolt signal proportional to the tension. The second tension sensor is used to detect the tension of the electrode sheet at the guide roller in front of the take-up shaft and outputs a differential millivolt signal proportional to the tension. The signal conditioning circuit is used to amplify and filter the differential millivolt signals output by the first tension sensor and the second tension sensor, and convert them into standard analog voltage signals of 0~10V for acquisition by the analog input port of the intelligent control module.

[0025] In this embodiment, both the first and second tension sensors are through-shaft strain gauge type tension sensors, respectively installed below the support bearing seats at the rear and front of the winding shaft. The signal conditioning circuit consists of an instrumentation amplifier, a low-pass filter, and an analog-to-digital converter. When the electrode is running, the radial force of the guide roller is proportional to the electrode tension, and the two tension sensors output differential millivolt signals. The differential millivolt signals are amplified by the instrumentation amplifier (100x gain), the low-pass filter (100Hz cutoff frequency) filters out high-frequency noise, and the analog-to-digital converter (16-bit, 500Hz sampling rate) converts them into a 0-10V voltage. The conditioned voltage signal is sent to the analog input port of the intelligent control module in real time, and the actual tension value is updated every 2ms. .

[0026] Furthermore, the intelligent control module, employing a PLC or embedded motion controller, integrates the following units coupled sequentially in a specific information flow: a roll diameter calculation unit, a segmented tension planning unit, a taper tension fusion unit, a deviation correction unit, a fuzzy adaptive PID adjustment unit, and a data monitoring and self-diagnosis unit. These units are used to calculate the current roll diameter and roll diameter change rate in real time; output a basic tension setpoint based on the current roll diameter's range; calculate the final tension setpoint based on the current roll diameter, basic tension setpoint, electrode elastic modulus, and electrode thickness; calculate the correction deviation based on the final tension setpoint, actual tension value, and roll diameter change rate; and, using the correction deviation and deviation change rate as input, tune the PID parameters online through fuzzy inference and output the control quantity.

[0027] In this embodiment, the roll diameter calculation unit reads the unwinding encoder pulse frequency of the unwinding module every 2ms. and the pulse frequency of the take-up encoder of the execution module and the radius of the unwinding roller As input, the current radius of the take-up roller is calculated in real time based on the linear velocity conservation formula. ; The current roll diameter is calculated using the following formula: ,in The range of values ​​is ; The rate of change in roll diameter is calculated using the following formula: , in, The roll diameter at the current sampling time. The diameter of the roll at the previous sampling time. The sampling period is 0.002s. Finally The output is sent to the segmented tension planning unit and the tapered tension fusion unit, and... The output is sent to the deviation correction unit.

[0028] The segmented tension planning unit receives the current roll diameter. According to the preset segmented volume diameter threshold and (satisfy < < < The winding process is divided into: Inner interval: < Middle layer: ≤ < Outer interval: ≥ This unit outputs the basic tension set value. The basic tension setting values ​​are process parameters calculated in advance through experimental calibration or empirical formulas based on the electrode material type, thickness, width, and other process parameters. These parameters are stored in tabular form in the non-volatile memory of the intelligent control module or downloaded from the host control system (MES) via the communication module. For example, for a 12μm thick copper foil electrode, the basic tension setting is 8N for the inner layer, 15N for the middle layer, and 22N for the outer layer. The system automatically matches the corresponding tension parameter table according to the current electrode model. The inner layer range output... Mid-level interval output Outer interval output And satisfy < ≤ And output to the tapered tension fusion unit.

[0029] The taper tension fusion unit receives the current roll diameter and basic tension setting as input, as well as other known parameters: taper coefficient. (Value range: 0.6~1.0), empirical correction factor (Value range 0.02~0.08), Elastic modulus of electrode (Value range 30×10) 9 ~110×10 9 Pa), electrode thickness (Value range 8×10) -6 ~30×10 -6 m); known constant: diameter of the winding shaft core. Maximum roll diameter when rewinding is complete The final tension setpoint is calculated using the following formula. : , Finally, the final tension setting value is output to the deviation correction unit.

[0030] The deviation correction unit is input with the final tension setpoint. The actual tension value The roll diameter change rate The correction deviation is calculated using the following formula: , in, This is the compensation coefficient for the rate of change in roll diameter, with a value ranging from 0.01 to 0.05. Calculate the rate of change of correction deviation: Let the correction deviation at the current sampling time be... The correction bias at the previous sampling time is Correction deviation rate of change The calculation formula is: , in, The sampling period is 0.002s.

[0031] The fuzzy adaptive PID control unit receives the correction deviation. and the rate of change of correction deviation The processing flow is as follows: Fuzzification: The actual values ​​of the correction deviation and the rate of change of the correction deviation are mapped to the fuzzy universe of discourse [-3,3] through a quantization factor, and divided into 7 fuzzy subsets using a triangular membership function: {NB,NM,NS,ZO,PS,PM,PB}. Fuzzy reasoning: Based on the 49 Mamdani rules (e.g., if...) For NB and If it is NB, then For PB, For NB, (e.g., PS), calculate the trigger strength of each rule; Defuzzification: Obtaining PID parameter corrections using the centroid method. , , ; Update PID parameters: , , ; Then, the control quantity is calculated using the incremental PID formula: , , in, This is the control quantity at the current moment; it is output to the execution module.

[0032] The data monitoring and self-diagnosis unit, upon inputting the final tension setpoint and the actual tension value, calculates and defines the tension deviation. ; Calculate the root mean square error of the most recent 1000 sampling points every 100ms: , Threshold determination: like > First threshold (e.g., 2.0N) and duration > Output alarm signal; among which The alarm delay time (e.g., 2 seconds) is used to prevent false alarms caused by momentary interference. like >The second threshold (e.g., 5.0N) will immediately output an emergency stop signal.

[0033] Furthermore, the execution module is configured to receive the control quantity to adjust the unwinding tension and the winding tension; the execution module includes an unwinding-side execution unit and a winding-side execution unit: The unwinding-side execution unit includes a magnetic powder brake excitation current drive circuit and an unwinding servo driver, used to receive the unwinding-side component of the control quantity output by the intelligent control module; wherein the magnetic powder brake excitation current drive circuit is used to convert the braking torque component into excitation current to adjust the resistance torque of the magnetic powder brake, and the unwinding servo driver is used to adjust the speed of the unwinding servo motor according to the speed compensation component, and the two work together to achieve precise control of the unwinding tension; The take-up side execution unit includes a take-up servo driver, a take-up servo motor, and a take-up encoder, and is used to receive the take-up side component of the control quantity output by the intelligent control module; wherein the take-up servo driver is used to convert the take-up torque component into drive current and adjust the output torque of the take-up servo motor, while the take-up encoder provides real-time feedback of the take-up shaft speed for use by the roll diameter calculation unit and the tension closed loop.

[0034] In this embodiment, control signals are received from the analog output port or pulse direction port of the intelligent control module. The unwinding-side execution unit converts the braking torque component in the control quantity into an excitation current of 0~2A, changing the resistance torque of the magnetic powder brake. The unwinding servo driver fine-tunes the speed of the unwinding servo motor according to the speed compensation component. The winding-side execution unit's winding servo driver converts the winding torque component in the control quantity into a drive current, adjusting the output torque of the winding servo motor. The winding encoder detects the winding shaft speed in real time and adjusts the pulse frequency. Feedback is sent to the intelligent control module; the above adjustments are executed every 2ms, forming a fast closed loop.

[0035] Furthermore, the floating roller buffer module includes a floating roller, a floating roller mounting bracket, a linear guide rail, a buffer cylinder, and a position sensor, providing mechanical buffering between the unwinding shaft and the tension sensor. The position sensor detects the current position of the floating roller in real time and outputs a position signal to the digital input terminal of the intelligent control module. When the unwinding accelerates or decelerates, the electrode tension changes instantaneously, and the floating roller moves up and down along the linear guide rail. The constant back pressure (0.2~0.5MPa) provided by the buffer cylinder absorbs the peak tension (approximately 30N impact) to absorb the instantaneous tension impact and prevent electrode breakage. The intelligent control module adjusts the unwinding speed command according to the floating roller position deviation (the difference between the current position and the center stroke zone) so that the floating roller always works within the preset center stroke zone (e.g., within ±5mm of the midpoint of the stroke), which is used to assist in adjusting the unwinding speed.

[0036] Furthermore, the intelligent control system for battery electrode winding tension also includes a communication module, which includes an Ethernet interface circuit, a protocol stack processor, and an isolation transformer, used to realize data exchange between the intelligent control module and the host monitoring system (MES), download electrode process parameters from production work orders, and upload real-time tension curves, alarm records, and winding quality data.

[0037] In this embodiment, at the start of production, the electrode process parameters (including electrode thickness, electrode elastic modulus, maximum roll diameter, core diameter, basic tension setting value, etc.) of the current work order are received from the upper-level monitoring system and written into the register of the intelligent control module; during the winding process, the tension curve, alarm records, and roll diameter data are packaged and uploaded to the upper-level monitoring system in real time; after winding is completed, a complete quality traceability data package is uploaded.

[0038] The overall process of the intelligent control system for battery electrode winding tension of the present invention is as follows: 1. Preparation stage: The communication module downloads process parameters (including basic tension setting value). , , The intelligent control module initializes the segmentation threshold according to the material type. , Taper coefficient, taper coefficient Empirical correction coefficient Compensation coefficient for roll diameter change rate and fuzzy PID initial parameters , , 2. Start-up buffer: When the unwinding module starts, the floating roller buffer module absorbs the start-up impact. The position signal assists in adjusting the unwinding speed, allowing the floating roller to quickly enter the central working area. 3. Real-time closed-loop control (every 2ms cycle): The tension detection module collects the actual tension value; the roll diameter calculation unit updates the current roll diameter based on the pulse frequency of the unwinding encoder and the pulse frequency of the winding encoder. and roll diameter change rate Segmented planning units are based on Read the corresponding basic tension setting value from the stored tension parameter table. The tapered fusion unit calculates the final tension setpoint. The deviation correction unit calculates and corrects the deviation. And calculate the rate of change of the corrected deviation. ; Fuzzy adaptive PID unit and As input, online tuning parameters and output control quantity. ; The execution module adjusts the tension. 4. Parallel assistance: The data monitoring and self-diagnosis unit calculates the root mean square error of the tension deviation in real time, and alarms or stops the machine when abnormalities occur. 5. When achieve At that time, the intelligent control module decelerates and stops, and the communication module uploads quality data. Through the above modular structure and cascaded coupling process, this invention achieves deep integration of roll diameter feedforward, material property feedforward, and fuzzy adaptive PID correction for deviation, which can effectively suppress dynamic disturbances, adapt to material differences between different batches of electrode sheets, and ensure tension control accuracy within ±2%.

[0039] Example 1 Intelligent control of the entire process of winding tension for 12μm copper foil electrodes.

[0040] Negative electrode copper foil sheet (thickness) =12×10 -6 m, elastic modulus of electrode =55×10 9 Pa); 1. System Configuration and Initialization The unwinding shaft is an air-expanding shaft (76mm diameter). The unwinding servo motor (Delta ASDA-A2, rated torque 7.16 N·m) and the magnetic powder brake (ZKB-2.5, rated torque 25 N·m) are coaxially mounted. Both the unwinding encoder and the take-up encoder are incremental encoders (2500 pulses / revolution, i.e., ... =2500), unwinding roller radius =0.1m. The tension sensor is a through-shaft strain gauge type (range 0~200N, accuracy 0.3%FS).

[0041] Before generation begins, the communication module (Profinet Ethernet) downloads process parameters from the supervisory control and data acquisition (MES) system: =0.15m, =0.35m, segmented threshold =0.20m, =0.28m, foundation tension setting value =8N, =15N, =22N. The intelligent control module applies a taper coefficient based on the material type. =0.75, empirical correction factor =0.05, compensation coefficient for roll diameter change rate =0.03, =1.2, =0.05, =0.01; Sampling period =0.002s.

[0042] 2. Start buffering The back pressure of the buffer cylinder is set to 0.3MPa, and the inductive position sensor detects the position of the floating roller in real time. When the tension peak occurs at the moment of startup, the floating roller is pulled down, and the PLC quickly increases the unwinding speed command according to the position deviation (the difference between the current position and the center stroke area), so that the floating roller returns to the center stroke area (midpoint of stroke ±5mm) within 50ms, absorbing the peak tension of about 30N and preventing the electrode sheet from breaking.

[0043] 3. Real-time closed-loop calculation (executed every 2ms) Actual tension value =13.2N; Roll diameter calculation: =1000Hz, =800Hz, calculate the current take-up radius =0.125m, current roll diameter =0.25m; =0.248m, then the rate of change of roll diameter =1m / s; because Located in the middle layer, the piecewise tension planning unit reads from memory. =15N, calculated as follows ≈12.8N; Correction deviation = -0.37N, =-0.3N, then the rate of change of the correction deviation = -35N / s.

[0044] The fuzzy PID tuning parameters output control quantity to the execution module, allowing the tension to quickly approach the set value.

[0045] 4. Anomaly Protection and Data Upload Tension deviation An alarm is triggered if the current exceeds 2.0N, and the machine is shut down if it exceeds 5.0N; after winding is completed, the entire process data is uploaded via Profinet.

[0046] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A smart control system for battery electrode winding tension, characterized in that, include: Unwinding module, used to load and drive the unwinding of electrode material rolls; The tension detection module is used to detect the operating tension of the electrode in real time and generate the actual tension value; The intelligent control module is used to calculate the current roll diameter and roll diameter change rate in real time; and output the basic tension set value according to the current roll diameter range. The final tension setting is calculated based on the current roll diameter, basic tension setting, electrode elastic modulus, and electrode thickness; the correction deviation is calculated based on the final tension setting, actual tension value, and roll diameter change rate. Using the correction deviation and the rate of change of the correction deviation as inputs, the PID parameters are tuned online through fuzzy inference and the control quantity is output. An execution module is used to receive the control quantity to adjust the unwinding tension and the winding tension; The communication module is used to enable data interaction between the intelligent control module and the upper-level monitoring system.

2. The intelligent control system for battery electrode winding tension as described in claim 1, characterized in that, The intelligent control module calculates the final tension setpoint using the following formula: ， in, The final tension setting value, The base tension setting value, The taper coefficient, The current volume diameter, Maximum roll diameter The diameter of the core is... This is an empirical correction factor. The elastic modulus of the electrode is... The thickness is the electrode thickness.

3. The intelligent control system for battery electrode winding tension as described in claim 1, characterized in that, The intelligent control module uses the following formula to calculate and correct the deviation: ， in, To correct the deviation, This is the actual tension value. This is the compensation coefficient for the rate of change in roll diameter. This represents the rate of change in roll diameter.

4. The intelligent control system for battery electrode winding tension as described in claim 1, characterized in that, The intelligent control module also includes a data monitoring and self-diagnosis unit, which is used to calculate the root mean square error of the deviation between the final tension set value and the actual tension value in real time. When the root mean square error exceeds the first threshold, an alarm is triggered, and when it exceeds the second threshold, an emergency stop is triggered.

5. The intelligent control system for battery electrode winding tension as described in claim 1, characterized in that, The unwinding module includes an unwinding shaft, an unwinding drive device, and an unwinding encoder; The unwinding shaft is used to load the electrode roll to be wound and drive the roll to rotate to achieve unwinding; The unwinding drive device is used to provide unwinding power and adjust unwinding tension; The unwind encoder is used to detect the rotational speed of the unwinding shaft in real time and feed the unwinding speed signal back to the intelligent control module.

6. The intelligent control system for battery electrode winding tension as described in claim 5, characterized in that, The tension detection module includes a first tension sensor, a second tension sensor, and a signal conditioning circuit; The first tension sensor is used to detect the tension of the electrode sheet at the guide roller behind the unwinding shaft and outputs a differential millivolt signal proportional to the tension. The second tension sensor is used to detect the tension of the electrode sheet at the guide roller in front of the take-up shaft and outputs a differential millivolt signal proportional to the tension. The signal conditioning circuit is used to amplify and filter the differential millivolt signals output by the first tension sensor and the second tension sensor, and convert them into standard analog voltage signals of 0~10V for acquisition by the analog input port of the intelligent control module.

7. The intelligent control system for battery electrode winding tension as described in claim 6, characterized in that, It also includes a floating roller buffer module, which is located between the unwinding module and the tension detection module to absorb instantaneous tension impacts and feed back the floating roller position signal to the intelligent control module to assist in adjusting the unwinding speed.

8. The intelligent control system for battery electrode winding tension as described in claim 1, characterized in that, The execution module includes an unwinding side execution unit and a rewinding side execution unit; The unwinding-side execution unit is used to receive the unwinding-side component of the control quantity output by the intelligent control module. The take-up side execution unit is used to receive the take-up side component of the control quantity output by the intelligent control module.

9. The intelligent control system for battery electrode winding tension as described in claim 1, characterized in that, The communication module is connected to the host monitoring system via an Ethernet interface, and is used to download electrode process parameters and upload real-time tension curves, alarm records and winding quality data.

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