A method for recycling useful parts of lithium iron phosphate battery

Abstract

The invention relates to a method for recycling useful parts of a lithium iron phosphate battery, comprising: step S1, injecting the positive electrode material of the lithium iron phosphate battery into a crushing device for crushing to obtain a first mixture; and step S2, passing the first mixture through a The screen is injected into the acid treatment device for acid treatment to form the first mixed solution, and the treated first mixed solution is injected into the lye treatment device for impurity removal; step S3, the separated liquid is injected into the precipitation device, and the organic solvent is injected into the precipitation device Mixing to form a lithium iron phosphate precipitate; step S4, the central control device injects the lithium iron phosphate precipitate into a grinding device for grinding, and the ground lithium iron phosphate powder is roasted to form a lithium iron phosphate positive electrode material. In the present invention, a central control device is provided to adjust the parameters of relevant components through the central control device, so that the electrochemical performance of the lithium iron phosphate positive electrode material meets the preset standard.

Description

technical field [0001] The invention relates to the field of recycling lithium iron phosphate batteries, in particular to a method for recycling useful parts of lithium iron phosphate batteries. Background technique [0002] At present, the commonly used power lithium-ion batteries can be divided into two types according to the cathode material system, one is a ternary material battery, and the other is a lithium iron phosphate battery. Lithium iron phosphate battery refers to a lithium ion battery using lithium iron phosphate as a positive electrode material. The cathode materials of lithium-ion batteries mainly include lithium iron phosphate, lithium manganate, lithium nickelate, ternary materials, lithium iron phosphate, etc. Among them, lithium iron phosphate is the cathode material used in most lithium-ion batteries at present. The cycle life of long-life lead-acid batteries is about 300 times, and the maximum is 500 times, while lithium iron phosphate power batteries ...

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Problems solved by technology

[0004] For this reason, the present invention provides a method for recycling useful parts of a lithium iron phosphate battery, which can solve the problem that the parameters of each step of recycling cannot be adjusted according to the charge and discharge efficiency of the recycled lithium iron phosphate positive electrode material so that the prepared lithium iron phosphate positive electrode material Standards compliant

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