A kind of treatment method of waste lithium iron phosphate power battery

Abstract

The invention discloses a processing method of a waste lithium iron phosphate power battery, wherein the processing method comprises the following steps: (1) recycling tabs of the power battery; (2) drilling holes on an aluminum plastic film of the power battery, carrying out constant temperature soaking of the battery in a 70-90 DEG C first strong alkali solution for 3-12 h, and filtering to obtain a first filtrate; (3) separating the aluminum plastic film with an electrical core; (4) placing the electrical core in a second strong alkali solution, soaking, and filtering the second strong alkali solution to obtain a filter residue and a second filtrate; (5) adding diluted hydrochloric acid into the filter residue, regulating the pH to 7, and then filtering to obtain a filtered substance and a third filtrate; and (6) drying the filtered substance to obtain a solid waste, merging the first filtrate, the second filtrate and the third filtrate to obtain an alkali-containing solution, adding a strong alkali into the alkali-containing solution to prepare a strong alkali solution having the same OH<-> concentration as the first strong alkali solution, and then replacing the first strong alkali solution for recycling. The processing method has the advantages of simple process steps, low cost, thorough treatment on the lithium iron phosphate power battery, high recycling rate, environmental protection, and high safety.

Description

technical field [0001] The invention relates to the technical field of recycling waste lithium ion batteries, in particular to a treatment method for waste lithium iron phosphate power batteries. Background technique [0002] Lithium iron phosphate batteries are widely used as power batteries because of their safety, good cycle performance, stable voltage, and good rate performance. Correspondingly, the treatment of waste lithium iron phosphate batteries has attracted more and more attention and attention. [0003] Application publication number CN102664294A, the Chinese patent application publication date 2012.09.12 discloses a recycling method for waste lithium iron phosphate batteries, the steps are as follows: remove the residual power from waste lithium iron phosphate batteries, take out the batteries and crush them into batteries Fragments, soaked in sodium hydroxide solution and stirred, then filtered, washed, dried and vibrating sieved, the pure aluminum, pure coppe...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems that the prior art lithium iron phosphate power battery treatment method is not thorough, the process steps are complicated, the treatment cost is high, and it will affect the environment. It provides a treatment method for waste lithium iron phosphate power battery. The process steps of the treatment method are simple, low in cost, and environmentally friendly. It not only treats the lithium iron phosphate power battery thoroughly, but also has a high recycling rate for the lithium iron phosphate power battery.