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Method for recycling lithium iron phosphate/ternary-lithium titanate batteries

A lithium titanate battery and lithium iron phosphate technology, applied in battery recycling, recycling technology, recycling by waste collectors, etc., can solve the problems of unclean, dead lithium, and difficulty in preparing lithium battery negative electrode materials, etc., to achieve the method Simple, easy-to-achieve effects

Active Publication Date: 2018-08-10
SHANGHAI ENNEAGON ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple and effective, but it is difficult to prepare an ideal lithium battery negative electrode material. Therefore, some trace impurities contained in the lithium orthotitanate material have not been completely removed, including some dead lithium, etc.

Method used

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  • Method for recycling lithium iron phosphate/ternary-lithium titanate batteries

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Taking the lithium iron phosphate-lithium titanate waste battery pack as an example, the recycling method is shown in the following steps:

[0030] 1. Dismantling: Mechanically disassemble the shell, BMS board, electrical wiring, screws and nuts, sensors, air cooling / liquid cooling system and other metal and plastic parts of the waste lithium titanate battery system, and sort them into warehouses.

[0031] 2. Discharge: Submerge the remaining lithium titanate battery system / module / monomer in 3.5% NaCl aqueous solution until fully discharged. Among them, the remaining lithium titanate battery system / module means that the mechanical disassembly may not be disassembled to the module level, or may be disassembled to the monomer, which needs to be disassembled according to the actual situation.

[0032] 3. Pulverization: (1) put it in a crusher and crush it into particles / fine pieces of 0-5cm level; (2) then put it in a pulverizer and pulverize it into fine powder of 0-3mm l...

Embodiment 2

[0042] Taking the waste ternary-lithium titanate battery pack as an example, the recycling method is shown in the following steps:

[0043] 1. Dismantling: Mechanically disassemble the shell, BMS board, electrical wiring, screws and nuts, sensors, air cooling / liquid cooling system and other metal and plastic parts of the waste lithium titanate battery system, and sort them into warehouses.

[0044] 2. Discharge: Submerge the remaining lithium titanate battery system / module / monomer in 3.5% NaCl aqueous solution until fully discharged. Among them, the remaining lithium titanate battery system / module means that the mechanical disassembly may not be disassembled to the module level, or may be disassembled to the monomer, which needs to be disassembled according to the actual situation.

[0045] 3. Pulverization: (1) put it in a crusher and crush it into particles / fine pieces of 0-5cm level; (2) then put it in a pulverizer and pulverize it into fine powder of 0-3mm level.

[0046]...

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Abstract

The invention belongs to the field of battery recycling, and in particular relates to a method for recycling lithium iron phosphate / ternary-lithium titanate batteries. The method comprises the following steps: disassembling, discharging, crushing, separating powder, separating diaphragms, separating plastic, separating metals, and separating lithium titanate, lithium carbonate and iron phosphate if a cathode material is lithium iron phosphate, or if the cathode material is a ternary material, separating titanium dioxide, manganese hydroxide, nickel hydroxide, cobalt hydroxide and the lithium carbonate. Compared with the prior art, the method realizes separated recovery based on the difference of physical and chemical properties of various valuable materials after full discharge, and has the advantages that all valuable elements of the lithium iron phosphate / ternary-lithium titanate batteries can be recovered from the system level to the battery cell level; in addition, the method provided by the invention is based on simple physical properties and chemical reactions such as acid-base precipitation; the method is simple and easy to implement, thus being suitable for industrial production.

Description

[technical field] [0001] The invention belongs to the field of battery recycling, in particular to a recycling and processing method for lithium iron phosphate / ternary-lithium titanate batteries. [Background technique] [0002] Lithium titanate batteries are characterized by low capacity, high rate, and long life. It is precisely because of these characteristics that lithium titanate batteries are very suitable for high-power applications, including road vehicles such as buses, as well as port cranes, mines, etc. Vehicles and off-highway vehicles such as excavators, power energy storage fields such as frequency modulation and peak regulation, peak shaving and valley filling. Lithium titanate batteries will be used more and more as the application area expands. This requires attention to the aftertreatment of lithium titanate after its performance decays, including cascade utilization and recycling. [0003] Recycling lithium titanate batteries is a new topic, so the rise o...

Claims

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Application Information

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IPC IPC(8): H01M10/54
CPCH01M10/54Y02W30/84
Inventor 张全生闵凡奇党国举张绍乙张绍凡周敦凡
Owner SHANGHAI ENNEAGON ENERGY TECH CO LTD
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