Lithium battery manufacturing filtration system

How is a lithium ion battery made?

A lithium ion battery is primarily comprised of electrodes (cathode and anode), separators and an electrolyte solution. The manufacturing process, which is outlined in Figure 1, involves forming the electrodes, stacking the cells, adding the electrolyte solution, charging the battery, aging and final inspection.

Does filtration improve battery performance?

Filtration has been found to significantly improve battery quality and performance. Proper filter selection is required to remove particulate contaminants and gels from solvents, water and the high viscosity slurries used in forming the electrodes. Filters are also needed to remove particle contamination during the electrolyte filling process.

How to choose a Li-ion battery filter?

The internal filter element, micron rating and efficiency are selected based on the specific operating conditions of the Li-Ion battery manufacturing process. 5-micron polyester (99+% efficient) performs well in most cases; however, different filter media, micron ratings, and efficiencies are available depending on the specific process conditions.

Which filter media is suitable for battery electrolytes?

Since electrolyte constituents vary considerably among battery manufacturers, the appropriate filter needs to be determined in each case. As indicated in Figure 8, Pall has a number of different filter media that are suitable for use with battery electrolytes: polytetrafluoroethylene (PTFE), high density polyethylene (HDPE) and polypropylene (PP).

What is the future of lithium-ion batteries?

The global market for rechargeable (secondary) lithium-ion battery manufacturing continues to grow due to the explosive demand for electric vehicles (EV's) driven by government policies and changing consumer behavior. Additionally, energy storage from renewable energy sources (solar and wind) is the next frontier for lithium-ion batteries.

What is a lithium electrolyte?

The electrolyte is typically comprised of lithium salts (e.g, LiPF6 or LiBF4) in organic solvents, such as ethylene carbonate (EC) or dimethyl carbonate (DMC). These salts may not completely dissolve in the solvents, and consequently must be removed by filtration.