4.2 Electrolyte Removal

After the battery has been shredded, the resulting shreds are dried to remove residual electrolyte solvents and, depending on the temperature, possibly degrade active material binders such as polyvinylidene fluoride (PVDF). Drying is essential for ensuring the safety and efficiency of subsequent processing steps—by preventing clumping and improving material flow during separation. 

Common drying technologies include rotary dryers or kilns, vacuum dryers, and conventional ovens. 

The selected drying temperature influences the design of the off-gas treatment system, as higher temperatures may lead to more aggressive or hazardous vapors.