The Mystery Of The Blue Grease in Large Lithium Battery Coating Machines

Key Lubrication Points in the Coating Process
During the coating of lithium-ion battery electrode sheets, the precision guide rails of the coating machine require specialized lubrication. A specific blue-colored grease is commonly applied to the following components:

Guide rails for the lateral movement of the coating head

Sliding components within the winding and unwinding mechanisms

Threaded drive mechanisms of the doctor blade adjustment assembly

This grease features high-temperature resistance, maintaining stable lubrication performance in environments reaching up to 80°C.

 The Specialized Formulation of the Blue Grease
Unlike conventional greases, this blue grease incorporates the following key ingredients:

Synthetic Base Oil: Ensures excellent fluidity at low temperatures

Lithium-based Thickener: Provides superior mechanical stability

Specialized Pigments: Facilitate visual monitoring of the lubrication status

Its coefficient of friction is precisely controlled within the range of 0.08 to 0.12, thereby ensuring smooth operation while effectively preventing slippage.

The Impact of Lubrication Quality on Battery Performance
Inadequate lubrication can lead to the following issues:

Non-uniform coating thickness (deviations exceeding 2 μm)

Formation of burrs along the edges of the electrode sheets

Equipment vibration that adversely affects coating density

During routine maintenance, technicians assess the grease's condition-specifically through changes in its color-to determine the appropriate replacement interval; typically, the grease is replenished every 200 hours of operation.