Lithium battery winding machine common abnormal problem processing program
Abstract:
This paper discusses in detail the common abnormal problems of lithium battery winding machine in the operation process, and provides the corresponding treatment methods. Through the in-depth analysis of equipment failure, it aims to provide effective solutions for relevant technicians to improve production efficiency and product quality.
I. Introduction
Lithium battery winding machine is one of the key equipments in the production of lithium battery, and its performance and stability directly affect the quality and yield of lithium battery.
In the actual production process, the winding machine may appear a variety of abnormal problems, which need to be dealt with timely and accurately to ensure the normal production.
II. The common abnormal problems and methods of treatment
1. Pole piece deviation
1) Reasons:
The pole piece itself is bent or deformed;
The tension of the unwinding device is not uniform; the winding process is subject to external interference, such as airflow, vibration, etc.;
The mechanical precision of the equipment is not enough, such as the parallelism and perpendicularity of the guide roller deviation.
2) Processing methods:
Check the quality of incoming poles, replace or correct the bent or deformed poles;
Adjust the tension control system of the unwinding device to ensure that the tension is uniform and stable, which can be realized by adjusting the parameters of the tension controller and checking the working status of the tension sensor;
Reduce the external disturbing factors, such as improving the production environment and increasing the vibration isolation measures of the equipment;
Check and calibrate the mechanical parts of the equipment to ensure that the parallelism and perpendicularity of the guide rollers are not sufficient.
The parallelism and perpendicularity of the guide rollers are within the permissible range, and repair or replace them if necessary.
2. Folding of pole piece
1) Reason:
The flexibility of the pole piece is not enough;
The winding speed is too fast;
The tension is too big or too small;
The shape or surface condition of the needle is not good.
2) Treatment:
Choose better flexibility of the pole piece material;
Reduce the winding speed, so that it adapts to the characteristics of the pole piece;
Reasonable adjustment of the size of the tension, through the test to determine the optimal range of tension, generally need to ensure that the pole piece is closely attached to the premise of reducing the tension as much as possible;
Check the status of the winding needle, such as wear and tear, deformation, or the surface is not smooth, etc., in a timely manner for repair or replacement, in addition, choose the right shape and size of the winding needle will also help reduce the pole piece folds. In addition, choosing the right shape and size of the needle will also help to reduce the folds of the pole piece.
3. Diaphragm folds or tears
1) Causes:
Quality of diaphragm material, such as insufficient strength and poor toughness;
Uneven or excessive unwinding tension of the diaphragm;
Friction between the diaphragm and other parts during the winding process;
Extrusion of the diaphragm by some parts of the equipment.
2) Treatment:
Replace the diaphragm material with reliable quality;
Adjust the tension of the diaphragm unwinding device to make it even and moderate, refer to the equipment manual or test to determine the appropriate tension value;
Check the parts in contact with the diaphragm in the equipment, such as guide rollers, roll needles, etc., to ensure that their surfaces are smooth and free of sharp edges or burrs, and if there is any problem, promptly polish or replace them;
Optimize the structural design of the equipment to avoid unnecessary extrusion on the diaphragm by the parts. Optimize the structural design of the equipment to avoid unnecessary extrusion on the diaphragm, and avoid the diaphragm being pulled or collided by external force during the operation.
4. Folding or insertion of pole ear
1) Reason:
The shape or size of the pole ear is irregular;
The pole ear is affected by external force during feeding, such as friction and collision with other parts;
The pole ear handling mechanism of the winding machine is not reasonably designed or not working properly.
2) Treatment:
Strictly control the quality of incoming lugs, screen or correct the lugs whose shapes and sizes do not meet the requirements;
Optimize the feeding path of the lugs to reduce the contact and friction with other parts, for example, increase the guiding device, adjust the feeding angle, etc.;
Check and improve the winding machine's lug handling mechanism, such as lug smoothing mechanism, clamping device, etc., to ensure that it can accurately and stably handle the lugs, and repair or repair the relevant parts if necessary. Repair or replace the relevant parts if necessary.
5. Failure of winding
1) Reason:
The width of pole piece and diaphragm is not consistent;
The position deviation of the two is large in the process of unwinding;
The control system of the winding machine is faulty, resulting in insufficient precision of the movement of the winding needle.
2) Treatment:
Check the incoming size of the pole piece and diaphragm to ensure that their widths are in line with the design requirements, and replace or adjust the materials with large deviations in size;
Adjust the unwinding device to keep the pole piece and diaphragm in the unwinding process in the right position, which can be realized by installing deviation-rectifying devices, adjusting the unwinding speed, etc.;
Check the control system of the winding machine, including the sensors, controllers, motors and other components, and troubleshoot and repair or replace them. Examine the faults and repair or replace them; at the same time, optimize and adjust the parameters of the control system to improve the movement precision and stability of the winding needle.
6. Equipment failure shutdown
1) Reasons:
Power supply failure, such as unstable voltage, power line short circuit, etc.;
Motor failure, such as motor overload, burnt, drive failure, etc.; sensor failure, such as position sensors, tension sensors, etc., failure;
Control system failures, such as PLC program errors, communication failures.
2) processing methods:
Check the power supply, to ensure stable voltage, power line connection is normal, for short circuits and other problems in a timely manner to repair;
Check the motor's operating conditions, measure the motor's current, resistance and other parameters, to determine whether the motor is normal, such as the motor overloaded or burned out, the need to replace the motor, and at the same time, check the drive settings and working conditions, if necessary, adjust or replace;
Check the working conditions of each sensor, clean the surface of the sensor, such as faulty PLC program, communication failure. Check the working condition of each sensor, clean the surface of the sensor, check whether the sensor connection line is loose or damaged, and replace the faulty sensor;
Check the hardware and software of the control system, see whether there is any error in the PLC program, and whether the communication line is well connected, restart the control system or re-program the system, and if the problem is still not solved, it may be necessary to contact the equipment manufacturer's technicians to carry out further maintenance and debugging. If the problem still cannot be solved, it may be necessary to contact the technical personnel of the equipment manufacturer for further maintenance and commissioning.
III. Conclusion
The normal operation of lithium battery winding machine is crucial for lithium battery production. By analyzing and discussing the common abnormal problems and treatment methods, as well as taking effective preventive measures, we can reduce equipment failure, improve production efficiency and product quality, and provide a strong guarantee for the development of lithium battery industry.
