Release date:

2021-07-14

The coating machine's process flow: The electrode substrate, mounted on the unwinding unit, is pulled out by rollers and, after automatic edge correction, enters the floating roller tension system. Once the unwind tension is adjusted, it moves into the coating head, where the electrode slurry is applied according to the preset program of the coating system. The wet-coated electrodes then proceed to an oven, where they are dried using hot air. After drying, the electrodes pass through another tension control system to fine-tune their tension while simultaneously regulating the winding speed—ensuring it stays synchronized with the coating speed. Finally, the electrodes are automatically corrected by the edge-tracking system to maintain proper alignment in the center, before being neatly wound up by the take-up mechanism. Unwinding → Splicing → Traction → Tension Control → Automatic Edge Correction → Coating → Drying → Automatic Edge Correction → Tension Control → Automatic Edge Correction → Winding The coated substrate (metal foil) is fed into the coating machine via the unwinding unit. At the splicing station, the leading and trailing edges of the substrate are joined to form a continuous strip, which is then conveyed by the traction system to the tension-adjusting and automatic edge-correction units. Here, the web path tension and position are precisely regulated before the material enters the actual coating section. During the coating process, the electrode slurry is applied in segments, with each segment precisely controlled for coating amount and blank length as pre-programmed. In cases of double-sided coating, the system automatically tracks both the first-side coating pattern and the corresponding blank lengths to ensure consistent application. Once coated, the wet electrodes are transferred to the drying system, where they undergo thorough drying at temperatures tailored to the coating speed and film thickness. After drying, the electrodes are further refined through tension adjustment and automatic edge correction before being wound up for subsequent processing steps. A key factor in maintaining the stability of the coating machine is critical—once a parameter is set correctly, it often needs to remain unchanged throughout an entire day. Any fluctuations or disturbances during the coating process can significantly impact battery performance. While machine stability is essential, the operator’s expertise and proficiency play an equally vital role. An exceptional operator not only masters the equipment operation but also understands how to perform routine maintenance effectively. Moreover, such an operator must be adept at identifying the root causes of any issues that arise during coating, pinpointing whether the problem stems from equipment settings, material quality, or operational practices—and, most importantly, knowing exactly how to address and resolve these challenges promptly.

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