Research on transient displacement response of the deviation correction mechanism of lithium-ion battery high-speed winding machine

Aiming at the common problem in the industry that response of the deviation correction mechanism of lithium-ion battery winding machine is not timely under the high-speed winding state of 3.5m/s, a theoretical dynamics model for displacement response of deviation correction mechanism of the lithium-ion battery high-speed winding machine based on lumped parameter method was established; the transient displacement response and error rate of the transient displacement response of the correction mechanism were analyzed, and the relationship between transient displacement response and the displacement input and the relationship between error rate of the transient displacement response and the displacement input were obtained. A finite element model of the transient displacement response of the deviation correction mechanism was established based on Ansys software, and the transient dynamic simulation of the deviation correction mechanism was carried out. An improved scheme was proposed to shorten the distance between motor and deviation correction roller, and change the deviation correction mechanism in series along the axis direction of the motor into a parallel arrangement. The effectiveness of the improved mechanism was verified through the high-speed winding test with winding rate of 3.5m/s. The results show that the main influencing factor of the transient displacement response of the deviation correction mechanism is overall stiffness. The time required to correct the deviation of the improved deviation correction mechanism is reduced by 38.6%. The proportion of pole pieces exceeding the allowable range of 0.2mm~0.8mm due to untimely deviation correction decreased from 12.9% to 0%. The results of test and simulation analysis conform well. The problem of untimely deviation correction was solved, which verified the effectiveness of the improved mechanism.