AB Simultaneous coating technology on both sides
Introduction to AB Simultaneous Coating Technology
In the 2010s, traditional lithium-ion battery coating machines typically employed a single-sided coating method. This required pole pieces to be coated twice—first on side A, dried, then rewinded for side B coating. However, advancements led to the development of double-sided coating machines designed for foldback processing, offering substantial improvements in efficiency.
Emergence of Simultaneous Coating Technology
Recent innovations have introduced AB Simultaneous Coating Technology on Both Sides, enabling both sides to be coated and dried concurrently. This new approach minimizes repetitive actions and significantly enhances coating efficiency.
Patent Advancements in Simultaneous Coating
In 2016, Professor Zhao Boyuan patented a "Simultaneous Double-sided Extrusion Coating Device." This device utilizes front and back coating units that coat substrates in a vertical upward direction. Air flotation steering converts this upward movement into horizontal, ensuring non-contact drying for superior coating results.
Panasonic's Two-sided Coating Device
Panasonic’s two-sided coating device emphasizes tensioning and substrate stabilization using a specialized adsorption mechanism. The uniform floating of substrates is achieved through positive and negative pressure balance, culminating in precise two-side coating using a floating drying oven.
Commercial Applications and Innovations
Companies like Golden Galaxy and Dürr have launched commercial solutions employing AB Simultaneous Coating Technology on Both Sides. These machines feature high-speed coating dies and unique floating ovens, overcoming challenges like jitter and ensuring quality and performance enhancements in lithium batteries.
Key Innovations in AB Simultaneous Coating Technology
- Development of combined extrusion coating dies for high-precision application.
- Introduction of floating high-speed ovens with optimized air supply structures.
- Addressing jitter issues to ensure consistent coating and drying processes.
- Utilizing enhanced tension control and deviation correction systems.
Research and Development in AB Simultaneous Coating Technology
Research teams have been focusing on improving coating uniformity using contact coating dies. Studies reveal that contact dies significantly reduce gap fluctuation, optimizing the coating process.
Modeling and Simulation for Improvement
Advanced models involving fluid dynamics and VOF two-phase flow have been developed to simulate second-side coating scenarios, providing valuable insights into factors affecting coating consistency and quality.
The Future of AB Simultaneous Coating Technology
As obstacles such as stable coating without back rollers and complete floating dries are conquered, AB Simultaneous Coating Technology on Both Sides is set to become the mainstream in lithium-ion battery manufacturing, promising continuous advancements in the industry.