Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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.

Active Publication Date: 2015-12-02
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In laboratory experiments, the positive and negative electrodes and the separator can be separated manually. For example, the Chinese patent application with the patent publication number CN102017276A (application number 200980100912.3) discloses a method for manually separating the positive electrode, the negative electrode, and the separator. However, in industrial production, There must be an easy and efficient way to do this

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for separating positive and negative poles and separators of lifepo4 batteries
  • A method for separating positive and negative poles and separators of lifepo4 batteries
  • A method for separating positive and negative poles and separators of lifepo4 batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a LiFePO 4 The method for separating positive and negative poles and diaphragms of batteries comprises the following steps:

[0021] a. LiFePO with shell removed 4 The core of the aluminum-plastic soft pack battery (including positive, negative and separator mixture), mechanically crushed into a size of 1cm 2 fragments of

[0022] b. If figure 1 As shown, place a large amount above 1cm 2 The fragments are uniformly fed to the conveyor belt 2 by the feeder 1, and the width of the conveyor belt 2 is 1m, so that the fragments are flattened on the conveyor belt 2 and advance at a constant speed. A circular magnet with a magnetic field strength of 15,000 gauss and a diameter of 1m is set above the conveyor belt. The suspended magnet 4 is 5cm away from the surface of the conveyor belt. During work, the positive electrode material is adsorbed by magnetic force. The conveyor belt advances to the end to be collected. When the feeding and trans...

Embodiment 2

[0025] Such as figure 2 As shown, a LiFePO 4 The method for separating positive and negative poles and separators of batteries comprises the following steps:

[0026] a. LiFePO with shell removed 4 The cell of the aluminum shell battery (including positive, negative and diaphragm mixture), mechanically crushed into a size of 100cm 2 fragments of

[0027] b. Put a large amount of the above 100cm 2 The fragments are evenly fed to the conveyor belt 2 by the feeder 1, and the width of the conveyor belt 2 is 1m. The fragments are spread on the conveyor belt and advance at a constant speed. At the end of the conveyor belt is a magnetic roller 3 with a magnetic field strength of 10,000 gauss. When the conveyor belt is driven by rotation, it absorbs the positive pole material. The negative pole and the diaphragm have no adsorption force and are separated from the conveyor belt by gravity. The positive pole rotates to the back with the magnetic roller and then detaches. conveyor ...

Embodiment 3

[0030] Such as image 3 As shown, a LiFePO 4 The method for separating positive and negative poles and separators of batteries comprises the following steps:

[0031] a. LiFePO with shell removed 4 The cell of the steel shell battery (including positive, negative and diaphragm mixture), mechanically crushed into a size of 50cm 2 fragments of

[0032] b. Put a large amount of the above 100cm 2 The fragments are evenly fed to the conveyor belt 2 by the feeder 1, and the width of the conveyor belt 2 is 1m. The fragments are spread on the conveyor belt and advance at a constant speed. At the end of the conveyor belt are two magnetic rollers 3 with a magnetic field strength of 5000 gauss. While the conveyor belt is driven by rotation, the positive electrode material is adsorbed. The negative electrode and the diaphragm have no adsorption force and are detached from the conveyor belt by gravity. The absorbed positive electrode material passes through a conveyor belt again. And ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
magnetic flux densityaaaaaaaaaa
Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54
CPCY02W30/84
Inventor 李东梅唐国鹏王锋超何睦赵光金
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com