Lithium iron phosphate positive plate comprehensive recycling equipment

Abstract

The invention relates to the technical field of waste lithium ion battery recycling, in particular to lithium iron phosphate positive plate comprehensive recycling equipment which comprises a separation mechanism, a lifting mechanism, a filtering mechanism, a material taking mechanism, a liquid conveying mechanism and a shell, and is characterized in that the separation mechanism is fixedly mounted at the top of the lifting mechanism; the lifting mechanism is slidably connected to the inner wall of the shell, the material taking mechanism is fixedly installed on the side wall of the separating mechanism, the filtering mechanism is fixedly installed at the bottom of the separating mechanism and slidably connected to the inner wall of the shell, and the liquid conveying mechanism is fixedly installed at the bottom of the shell; according to the device, the dissolution rate of NMP and a binding agent can be increased, the undissolved binding agent is prevented from being attached to a collector electrode, the working efficiency of the device is improved, meanwhile, centrifugal force generated by the device can counteract part of adhesive force of lithium iron phosphate on the collector electrode, and therefore the dissolution amount of NMP and the binding agent is reduced, the use amount of NMP is reduced, and the recovery cost is reduced.

Description

technical field [0001] The invention relates to the technical field of recycling and utilization of waste lithium ion batteries, in particular to a comprehensive recycling device for lithium ferrous phosphate positive plates. Background technique [0002] Lithium ferrous phosphate, chemical formula: LiFePO4, lithium ferrous phosphate is a newly developed lithium-ion battery electrode material, mainly used in power lithium-ion batteries, as a positive active material. Compared with the traditional cathode materials for lithium ion secondary batteries, LiMn2O4 with spinel structure and LiCoO2 with layered structure, LiMPO4 has a wider source of raw materials, lower prices and no environmental pollution. Lithium iron phosphate has the characteristics of high working voltage, high energy density, long cycle life, good safety performance, low self-discharge rate, and no memory effect. The positive electrode sheet is an electrode of a battery composed of a current collector, an a...

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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a comprehensive recycling equipment for lithium ferrous phosphate positive plate, which solves the problem that: in the existing equipment, roasting and chemical methods are mostly used to recover lithium ferrous phosphate, and the method of roasting Although it is simple, it consumes a lot of energy, and the recovered product will produce impurities, which leads to the low purity and quality of the recovered lithium iron phosphate, which can no longer be used as a battery positive electrode material. However, through chemical recovery, the positive electrode sheet The current collector, conductive agent, binder and lithium iron phosphate are separated to obtain lithium iron phosphate with high purity. This method consumes a large amount of chemical preparations and produces chemical waste liquid. The waste liquid is time-consuming and labor-intensive and may cause pollution. environmental problems

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