Ultrasonic Lithium Battery Spraying Equipment: Precision Empowerment For High-Quality Upgrade Of The Lithium Battery Industry

The core working logic of ultrasonic lithium battery spraying equipment is to utilize piezoelectric ceramic transducers to convert electrical energy into high-frequency mechanical vibrations of 20kHz-120kHz. Through capillary wave fragmentation, the lithium battery slurry (positive electrode, negative electrode, electrolyte, or ceramic slurry, etc.) is atomized into uniform micro-droplets of 1-50μm. These droplets are then gently transported to the substrate surface at low speed (<1m/s) by a low-pressure carrier gas. After drying and curing, a dense and uniform functional coating is formed. The entire process requires no high-pressure airflow assistance, fundamentally solving the pain points of traditional processes.

Unlike traditional high-pressure airflow spraying and blade coating processes, ultrasonic spraying relies entirely on high-frequency vibration energy for atomization, eliminating the need for high-pressure impact. This avoids coating defects caused by droplet agglomeration and splashing, and enables non-contact coating, protecting fragile substrates such as ultra-thin current collectors (copper foil and aluminum foil below 6μm) and flexible separators from damage. Meanwhile, by precisely controlling parameters such as ultrasonic amplitude, spraying speed, nozzle distance, and slurry flow rate, the coating thickness can be controlled at the nanometer to micrometer level, with a thickness uniformity error of ≤±2% and a porosity uniformity error reduced to ±1%, achieving a precision control effect that is difficult to achieve with traditional processes.

Core advantages:

Superior Coating Quality, Laying a Solid Foundation for Battery Performance A uniform and dense coating is a core prerequisite for improving the performance of lithium batteries.

Ultrasonic spraying atomizes the slurry into uniform micron-sized droplets, resulting in a coating free of pinholes, agglomeration, and edge effects. This effectively avoids problems such as uneven coating thickness, cracking, and missed coatings found in traditional processes, significantly improving the consistency of the electrodes and separators. For example, in electrode coating, a uniform coating can shorten the lithium-ion migration path, reducing battery charging time by more than 30% compared to traditional processes. In separator coating, precisely controlled ceramic coatings can improve the separator's heat resistance to over 200℃, effectively suppressing high-temperature thermal shrinkage and reducing the risk of battery short circuits. Simultaneously, gradient coating designs can be achieved through parameter adjustment, such as a manganese-rich surface layer and a nickel-rich bottom layer, optimizing battery electrochemical performance and contributing to the development of high-energy-density batteries.

(II) High Material Utilization, Achieving a Win-Win Situation of Cost Reduction and Efficiency Improvement

Lithium-ion battery slurries often contain precious metals such as cobalt, nickel, and platinum, as well as high-value materials such as graphene and carbon nanotubes. Material loss directly affects production costs. Traditional spraying processes suffer from uneven atomization and severe splattering, resulting in slurry loss rates exceeding 15%. Ultrasonic spraying, with its precise atomization and directional deposition capabilities, can increase material utilization to 85%-95%, significantly reducing waste of valuable materials. This is particularly suitable for coating high-value catalyst solutions, significantly lowering enterprise production costs. In large-scale mass production, this advantage can translate into significant economic benefits, helping enterprises build a cost advantage in fierce market competition.

(III) Strong Process Compatibility, Adapting to Diverse Production Needs

Ultrasonic lithium-ion battery spraying equipment possesses extremely high process flexibility, compatible with various slurry systems such as water-based and solvent-based slurries, and adaptable to the coating needs of all core components of lithium-ion batteries, including the positive electrode, negative electrode, separator, and tabs. Whether it's the active slurry coating of high-nickel cathodes and silicon-carbon anodes, the ceramic coating and polymer coating modification of separators, or the anti-corrosion coating of tabs and the protective coating of shells, the equipment can achieve precise coating through parameter adjustments. Simultaneously, the equipment is adaptable to different scenarios such as laboratory R&D, pilot production, and industrial mass production, covering various models including desktop, pilot-scale, and conveyor types, achieving full-process coverage from formula verification to large-scale production.

(IV) Green, Environmentally Friendly, and Highly Efficient, Aligning with Industry Development Trends

Compared to traditional high-pressure spraying which requires a large amount of high-pressure air, ultrasonic spraying does not require high-pressure airflow assistance, reducing solvent evaporation by 30%-50% and lowering VOC emissions, aligning with the low-carbon manufacturing development trend of the lithium battery industry. Furthermore, the equipment adopts a non-clogging design, and atomization does not rely on small-diameter nozzles, effectively avoiding downtime maintenance caused by slurry clogging, reducing production interruption time, and improving production efficiency; coupled with a solvent recovery device, environmental costs can be further reduced, achieving a closed-loop green production system.

Core applications: Covering the entire lithium battery industry chain, empowering high-end manufacturing.

(I) Electrode Preparation: Improving Battery Energy Density and Cycle Life

(II) Separator Modification: Strengthening Battery Safety Barrier