Method for comprehensively recycling waste lithium ion batteries

The invention discloses a method for comprehensively recycling waste lithium ion batteries, and belongs to the field of recycling of regeneration resource. The method comprises the following steps: a, performing discharging processing on waste lithium ion batteries; b, fragmenting waste lithium ion batteries into sheets with a diameter of 10-20 mm in a closed shearing-type crusher, and spraying during fragmentation to dissolve lithium hexafluorophosphate in the waste lithium ion batteries into a spraying solution; c, peeling carbon powder on the surface of aluminium foils through stirring, dissolving electrolyte into the spraying solution, and recovering carbon powder; d, sending the sheets into a sodium hydroxide solution, peeling lithium cobalt oxide powder on the surface of aluminium foils through stirring, and recovering lithium cobalt oxide powder; e, cleaning the sheets, and recovering lithium cobalt oxide powder; and f, separating and recovering plastic and a copper-aluminium mixture. The method realizes recovery of carbon powder, lithium cobalt oxide powder, the copper-aluminium mixture and plastic through a simple environment-friendly process, and has certain economic benefit and social benefit.