Advanced winding tension method for preventing axial slip of the center-wound roll

Abstract

Center winding is one of the most suitable and universal schemes in the winding mechanism. In general, the quality of wound rolls is significantly degraded by axial slip. In this paper, an advanced winding tension method is proposed to overcome axial slip. Firstly, the axial slip mechanism is analyzed by means of the mutual mechanical relationship between the layers of the center-wound roll. Secondly, a mathematical model for overcoming axial slip was developed based on the correlation between axial slip and winding tension. Then, based on the mathematical model, a special neural network structure with back propagation training is developed so that the winding tension is dynamically updated with the winding radius. Finally, a roll-to-roll slitting system for lithium-ion battery pole pieces is proposed and used to verify the performance of the proposed method. The experiments show that there is no quality problem of axial slip in the center-wound rolls wound by the winding tension control method proposed in this paper. It shows that the winding tension control method proposed in this paper is effective in preventing axial slip.