Ultrasonic Technology And Battery Manufacturing
Batteries are an indispensable thing in our daily life, and in the process of making batteries, the technical wingman, the ultrasonic wave, has contributed greatly.
Dispersed battery slurry:
The preparation of lithium battery slurry includes a series of processes such as mutual mixing, dissolution and dispersion between liquid and liquid, liquid and solid materials, and the process is accompanied by changes in temperature, viscosity, and environment. The mixing and dispersion of lithium battery slurry always accompanies the whole process of lithium battery slurry preparation.
Lithium battery slurry dispersion is stirred due to the instantaneous acoustic cavitation effect of ultrasonic waves. Ultrasonic stirring can achieve the same effect as stirring based on hydrodynamic technology. Ultrasonic agitation of ultrasonic technology is particularly advantageous for battery slurry preparation.
Ultrasonic dispersion is more suitable for slurries with relatively high solids content than slurries with low solids content. For slurries, a high solids content is advantageous. The increase of the solid content will make the active substances and conductive agents in the slurry less likely to settle, which is beneficial to the uniformity of the slurry, and can reduce the amount of solvent, reduce the coating and drying time, and improve the battery production efficiency.
By utilizing ultrasonic technology, ultrasonic lithium battery slurry dispersion can not only reduce battery production cost, but also improve battery capacity and cycle stability.
Catalyst materials for fuel cells can be synthesized by ultrasonic nozzles and then sprayed onto the surface of polymer electrolyte membranes for fuel cells. Ultrasonic spray systems can be used to accurately, precisely and uniformly spray catalyst onto electrolyte membrane layers, thereby minimizing overspray, which can lead to spray equipment optimization, repeatability, sustainability, and cost savings. effect.
Battery spot welding:
Compared to Resistance Spot Welding (RSW) and Laser Beam Welding (LBW), Ultrasonic Metal Welding (UMW) is a more ideal joining process for Li-ion battery applications. RSW relies on the resistance of the material to generate heat to make the connection. However, aluminum and copper foils commonly used in the battery industry have extremely low electrical resistance, and the tough oxide layer formed on the surface of the aluminum foil inhibits the application of RSW. LBW is very sensitive to material layer gaps at both ends of the weld. A general rule of thumb is that the gap should be less than 10% of the material thickness, i.e. a 12µm foil will require a gap of 1.2µm or less, and these requirements are difficult to achieve. For the ultrasonic metal welding process, there are no such problems as above.
Contact Person: Ms. Hogo Lv