Recovery method of multi-model waste lithium ion batteries

Abstract

The invention provides a method for recycling multiple types of waste lithium ion batteries. The method comprises the following steps: discharging; disassembling a lithium ion battery shell, and separating by a crushing winnowing machine; collecting the electrolyte and carrying out reduced pressure distillation to respectively recover a low-boiling-point organic solvent and a high-boiling-point organic solvent; adding a diluted hydrochloric acid solution into the electrolyte to obtain a mixed solution A; crushing, dissolving and filtering residual components of the lithium ion battery to obtain a mixed solution B and a solid component B; mixing and heating the mixed solution A and the mixed solution B until the solvent is volatilized, calcining to obtain a solid C, and adding a sufficient diluted hydrochloric acid solution for dissolving to obtain a mixed solution C; carrying out electrolysis and chelating resin adsorption on the mixed solution C; adding sodium carbonate, stirring, standing to form lithium carbonate precipitate, filtering and drying; mixing the generated waste liquid to obtain a mixed liquid E, and carrying out electrolysis and chelating resin adsorption on the mixed liquid E; and collecting the electrolytic waste liquid. According to the recycling method disclosed by the invention, the waste lithium ion batteries of various models can be subjected to full-flow type recycling treatment, and the treatment cost is greatly reduced.