Automatic adjusting system for copper foil passivation treatment and control method thereof
By using closed-loop pressure control of the main passivation roller and the auxiliary passivation roller, and a dense spraying structure at the edge and sparse spraying in the middle of the passivation liquid spray pipe, combined with temperature-viscosity synergistic closed-loop, the problems of high manual dependence, unstable pressure, easy damage to thin copper foil by single roller and uneven coating in copper foil passivation process are solved, thus achieving efficient and stable copper foil passivation process.
Patent Information
- Application Number
- CN202610642382.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing copper foil passivation equipment suffers from problems such as high reliance on manual labor, unstable pressure control, single-roller structure that easily damages thin copper foil, poor uniformity of immersion coating, and insufficient automation and linkage, making it difficult to meet the requirements for large-scale production of high-end lithium battery copper foil.
A pressure closed-loop control system is formed by using a main passivation roller and a secondary passivation roller in conjunction with a servo motor and a pressure sensor. Combined with the edge dense spraying and central sparse spraying structure of the liquid roller and the temperature-viscosity coordinated closed loop of the passivation liquid heater and viscosity sensor, the uniformity of the passivation layer thickness and the process stability of the copper foil are achieved. Automated control is achieved through the current linkage between the control unit and the foil production machine.
It has improved the uniformity of copper foil passivation layer thickness, increased the copper foil yield to 99.8%, significantly improved process stability, solved the problems of extrusion deformation and uneven coating of thin copper foil, and reduced production costs and scrap rate.
Smart Images
Figure CN122406202A_ABST