A method for separating positive and negative poles and separators of lifepo4 batteries

A membrane separation and battery technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., to achieve good separation effect and simplify recycling steps.
CN103474720BActive Publication Date: 2015-12-02STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
Publication Date
2015-12-02

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Abstract

A method for separating the positive and negative electrodes and diaphragms of LiFePO4 batteries: a. Mechanically crush the batteries (including the mixture of positive and negative electrodes and diaphragms) of LiFePO4 batteries that have been removed from the shell into fragments with a size of 1cm2~100cm2; b. The feeder evenly feeds the above-mentioned fragments to the conveyor belt, and the fragments are flattened on the conveyor belt and advance at a constant speed. By setting a magnet above the conveyor belt, or using a magnetic roller, the magnetic positive electrode material is separated from the negative electrode material and the diaphragm; c. After immersing the negative electrode and diaphragm material obtained after separating the positive electrode into water, collect the diaphragm material floating on the upper layer, and salvage and collect the negative electrode material sinking at the bottom, so as to realize the separation of the negative electrode and the diaphragm. The invention can conveniently and efficiently realize the separation of the positive electrode, the negative electrode and the diaphragm of a large-scale LiFePO4 battery, and avoids possible harm to the environment caused by methods such as the use of organic solvents and high-temperature heating.
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Description

technical field

[0001] The content of the present invention belongs to the technical field of recycling and processing of waste batteries, and in particular relates to a LiFePO 4 A method for separating the positive electrode, the negative electrode and the diaphragm of the battery cell. Background technique

[0002] The positive and negative electrode materials, electrolytes, and electrolyte solvents of lithium-ion batteries have certain impacts on the environment and human health. As the number of spent lithium-ion batteries increases, the cumulative effect of pollution increases. The United States has classified lithium-ion batteries as a battery with flammability, leaching toxicity, corrosion, reactivity and other toxic and harmful properties. It is the battery that contains the most toxic substances among all types of batteries. If batteries are discarded randomly in the environment, harmful substances will enter the soil and water bodies to cause pollution, and event...

Claims

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