Method for recycling useful components of lithium iron phosphate battery

Abstract

The invention relates to a method for recycling useful components of a lithium iron phosphate battery, which comprises the following steps: S1, injecting a positive electrode material of the lithium iron phosphate battery into a crushing device, and crushing to obtain a first mixture; S2, injecting the first mixture into an acid liquor treatment device through a screen mesh arranged below the crushing device for acid treatment to form a first mixed liquor, and injecting the treated first mixed liquor into an alkali liquor treatment device for impurity removal; S3, injecting the separated liquid into a precipitation device, and mixing the separated liquid with an organic solvent injected into the precipitation device to form a lithium iron phosphate precipitate; and S4, injecting the lithium iron phosphate precipitate into a grinding device for grinding by the central control device, and roasting the ground lithium iron phosphate powder to form the lithium iron phosphate positive electrode material. The central control device is arranged, and parameters of related parts are adjusted through the central control device, so that the electrochemical performance of the lithium iron phosphate positive electrode material meets a preset standard.

Description

technical field [0001] The invention relates to the field of lithium iron phosphate battery recycling, in particular to a method for recycling useful parts of the lithium iron phosphate battery. Background technique [0002] Currently commonly used power lithium-ion batteries can be divided into two types according to the positive electrode 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 that uses lithium iron phosphate as the positive electrode material. The positive electrode 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 currently the positive electrode material used in most lithium-ion batteries. The cycle life of long-life lead-acid batteries is about 300 times, and the maximum is 500 times. The cycle lif...

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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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