Constant pressure control method and constant pressure adjusting device

Abstract

The invention discloses a constant-pressure control method which comprises elastic self-adaptive adjustment and closed-loop feedback adjustment. In the elastic self-adaptive adjustment, a self-adjusting module senses the change of the thickness of the product and compensates or absorbs the change of the rolling pressure on the surface of the product, so that self-adaptive telescopic adjustment is realized; in the closed-loop feedback regulation, the sensor module obtains real-time rolling pressure, the controller controls the pressure applying module to adjust the rolling pressure to a set pressure value, and pressure balance control is recovered. Through the combined action of elastic self-adaptive adjustment and closed-loop feedback adjustment, high-precision control is achieved, and the rolling pressure in the rolling process is stabilized.

Description

【Technical field】 [0001] The invention belongs to the technical field of battery pole piece processing, and in particular relates to a constant voltage control method and a constant voltage regulating device. 【Background technique】 [0002] After the battery electrode sheet is coated with the active material, it is usually necessary to roll the electrode sheet to increase the density of the solid active material. The traditional roller press drives a pair of steel rollers to exert rolling pressure on the pole piece through a hydraulic or pneumatic system. The control of the rolling pressure is mainly realized by controlling the pressure of the oil pressure in the hydraulic system. [0003] However, due to the large momentum of the hydraulic system, the oil / air pressure control accuracy is not high, the piston cylinder has motion damping, and the battery pole piece is a solid sheet, it is difficult to perform high-precision rolling pressure when rolling the pole piece during ...

AI Technical Summary

Problems solved by technology

[0003] However, due to the large momentum of the hydraulic system, the oil / air pressure control accuracy is not high, the piston cylinder has motion damping, and the battery pole piece is a solid sheet, it is difficult to perform high-precision rolling pressure when rolling the pole piece during movement. control

Furthermore, when the thickness of the battery pole piece changes in the order of microns, the traditional roll gap and rolling pressure cannot be adjusted in time according to the actual situation. The steel roller is in rigid contact with the solid active material on the pole piece, and there is no buffer mechanism, resulting in The actual rolling pressure of the pole piece will change abruptly, and the control of the rolling pressure is extremely unstable

[0004] In the traditional scheme of servo motor movement and pressure sensor feedback, due to the limited movement accuracy and resolution of the servo motor, the movement of the servo motor must be the position movement of the unit on the microcosm, rather than continuous position, so for solid matter When performing constant pressure control, the output pressure change of the servo motor must also be a step change of the unit type, and the jump of this pressure step change will definitely cause high-precision pressure control.

Images