Recycling method of waste lithium battery

Abstract

The invention belongs to the recycling field of a battery, and specifically discloses a recycling method of a waste lithium battery with high resource recycling rate and green and environment protection properties. The recycling method of the waste lithium battery comprises the steps of performing pretreatment, smashing and drying on the lithium battery, performing separation on battery fragmentsand performing processing on the separated objects. By performing electrolyte filtering and recycling on the smashed lithium battery, and by performing condensing and electrolyte collecting on the exhausted air of drying equipment, the electrolyte recycling rate is improved, and sewage and waste gas processing quantity are decreased; meanwhile, by virtue of the drying equipment for drying, complete separation of the electrolyte on the battery fragments can be facilitated; the dried battery fragments are subjected to stirring and screening treatment in sequence, so that recycling of battery pole piece current collectors, noble and rare metals and other resources from the lithium battery can be facilitated separately; and in addition, the recycling rate is relatively high, and pollution in the whole recycling process is relatively low.

Description

technical field [0001] The invention belongs to the field of battery recycling, and in particular relates to a recycling method for waste lithium batteries. Background technique [0002] With the development of science and technology, electronic products have penetrated into every corner of people's lives. Compared with nickel-cadmium batteries and nickel-hydrogen batteries, lithium-ion batteries have the advantages of small size, light weight, high working voltage, high volume and mass specific energy, no memory effect, small self-discharge, wide operating temperature range, and long life. Has dominated the market of small portable electronic products, such as: used in portable phones, cameras, portable notebooks and so on. With the continuous development of society and the emergence of climate, energy and environmental issues, lithium-ion batteries have also been widely used in the field of electric vehicles. [0003] In 2010, the output of lithium-ion batteries in my co...

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Problems solved by technology

For example, the patent application with the application number 201610314509.2 discloses a device and method for the separation and collection of waste lithium battery components and materials, which mainly adopts simple dry methods such as mechanical crushing, vacuum separation, vibration screening, specific gravity separation, and air flow separation. Separation and collection of electrode materials, current collector metals, plastic diaphragms, and battery casings in waste lithium batteries; the electrolyte is recovered by vacuum, which has low recovery efficiency and large equipment investment

Another example is the patent application number 201010262198.2, which discloses a method for recovering valuable metals from waste lithium batteries. The discharged waste lithium batteries are mechanically crushed and calcined at a high temperature of 350°C-400°C to obtain materials containing cobalt, copper and aluminum. , and then carry out wet treatment; the advantage is that the early treatment is simple, and the disadvantage is that the waste gas treatment after sintering is difficult and costly

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