Method for disassembling and separating waste lithium-ion battery

A method for disassembling and separating a waste lithium-ion battery, comprising:

• putting a battery pack or a cell with a voltage within 36 V of the waste lithium-ion battery into a roller tearing machine to tear with electricity directly under protection of water with a mass ratio of 1 to 10 times or directly under a water spraying condition without lowering or eliminating the voltage by physical and chemical means after removing a housing, then performing first wet screening, directly performing wet degumming without drying after recovering an electrolyte and removing iron by two-stage magnetic separation, then performing first crushing with water, third wet screening and second crushing with water after performing second wet screening, and finally performing jigging separation to obtain copper powder, aluminum powder, positive and negative electrode materials, plastic powder and separator pulp;
• and
• wherein the recovering the electrolyte comprises:
• performing oil-water separation on undersize materials of the wet screening, a light liquid being the electrolyte, and a heavy liquid and a precipitate being the water and rough positive and negative electrode materials 1, performing separation by a plate-and-frame filter press, a filter cake being the rough positive and negative electrode materials 1, and a filtrate returning to the section as tearing water, and packing the electrolyte by a closed iron drum to store in a warehouse and sent to a qualified unit for treatment as the electrolyte.