Online full-automatic cleaning device and method for lithium battery slit extrusion type coating die head

Abstract

The invention relates to an online full-automatic cleaning device and method for a lithium battery slit extrusion type coating die head. A die head lip opening and a coating steel roller are included. A cleaning mechanism is arranged between the die head lip opening and the coating steel roller and comprises a cleaning cavity plate. The cleaning cavity plate comprises a seal long strip and a flow guiding arc groove. The end portions of the front end and the rear end of the cleaning cavity plate are connected with an inlet seal plate and an outlet seal plate. The flow guiding arc groove makes contact with the upper slope and the lower slope of the die head lip opening through the seal long strip, and after pressing and sealing, a closed cleaning tunnel is formed. The inlet seal plate and the outlet seal plate make contact with the two ends of the formed closed cleaning tunnel for pressing, circumferential sealing is conducted, an inlet and an outlet are connected with pipelines, and the pipelines are provided with electromagnetic valves. When coating is stopped, the equipment automatically opens various valves, slurry circulation in the die head and die head lip opening slit periodical flushing and blowing-dry cleaning procedures are executed, deposited slurry and air in the die head are avoided, the lip opening slit is free of dry and hard slurry, and the lip opening is clean.

Description

technical field [0001] The invention belongs to the technical field of slit extrusion coating, in particular to an online automatic cleaning device and method for a lithium battery slit extrusion coating die head. Background technique [0002] At present, lithium batteries are developing rapidly in the new energy industry, from the initial mobile phone lithium batteries to the current new energy vehicle power batteries, and the power batteries mostly use the slit extrusion method. Slot extrusion coating is a precise wet coating technology, the working principle is that the coating slurry is extruded and sprayed along the gap of the coating mold under a certain pressure and a certain flow rate, and then transferred to the substrate. Slot extrusion coating has fast speed, high precision, uniform wet thickness, closed coating system, can prevent pollutants from entering during the coating process, high slurry utilization rate, stable slurry properties, and can adapt to differen...

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Problems solved by technology

This method relying on manual processing is more complicated, takes a long time to clean, and the cleaning effect varies depending on the proficiency of the manual technology. There will also be operational errors that cause equipment or personnel injuries; personnel entering the coating room and wiping with alcohol will also affect the indoor temperature. Humidity and cleanliness have a certain impact on coating stability and coating quality and safety; it is also a waste of slurry resources to spray a large amount of slurry in the die and remove air; it is neither economical nor expensive to wipe with a large amount of dust-free cloth. waste

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