A system and method for variable speed winding of a square winder

Abstract

The invention provides a square winder variable-speed winding system and a method. The square winder variable-speed winding system comprises a servomotor module, a coding module, an acquisition module and a control module, the servomotor module comprises a winding pin-driving unit and a pulse generator unit, and the pulse generator unit outputs the working pulses of the servomotor module; the coding module adopts a coder unit to periodically interrupt and output feedback pulses; the acquisition module simultaneously acquires the working pulses and the feedback pulses; the control module comprises a central processor unit, a memory unit and a control unit, the central processor unit is used for calculating the winding speed corresponding to the feedback pulses and storing the corresponding relation between the winding speed, the working pulses and the feedback pulses into the memory unit, and the control unit changes the winding speed of the system according to the corresponding relation between the working pulses and the corresponding relation.

Description

technical field [0001] The invention relates to a square winding machine system, in particular to a variable speed winding system and method for a square winding machine. Background technique [0002] The development of the lithium battery industry is currently a hot industry that is developing day by day in the world, especially the square battery has its unique advantages and is widely used, and the winding of lithium-ion battery cells is one of the key links in the production of lithium-ion batteries. Its winding tension control accuracy, winding speed, yield and other indicators directly determine the performance of the battery. Especially for common prismatic batteries, since the winding needle for winding the prismatic battery cells is flat, during the winding process, when the winding needle rotates at a constant speed for winding, the actual linear speed of the tape actually changes periodically. As a result, the tension of the strip material also changes periodical...

AI Technical Summary

Problems solved by technology

Especially for common prismatic batteries, since the winding needle for winding the prismatic battery cells is flat, during the winding process, when the winding needle rotates at a constant speed for winding, the actual linear speed of the tape actually changes periodically. As a result, the tension of the strip material also changes periodically, which directly leads to the deformation of the wound battery cells, and the winding of the battery cells is uneven, which seriously affects the quality and production efficiency of the battery. a problem in the process

[0003] At present, the common method is to use the usual mathematical modeling or drawing points to control. After changing the winding needle, because the shape of the winding needle is different, it is necessary to recalculate or draw the points. The debugging time is quite long, and the winding needle is winding In the process, as the number of winding turns increases, the width will change. Under the same angle and corresponding angular velocity, the winding line speed will also change, which will also restrict the increase in winding speed. It increases the difficulty of tension fluctuation and debugging, so there is an urgent need for a fast, simple and accurate winding system for square winding machines

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