Check patentability & draft patents in minutes with Patsnap Eureka AI!

Thermolysis method and thermolysis system of waste lithium ion battery

A technology for lithium-ion batteries and waste, which is applied in the field of pyrolysis methods and systems for waste lithium-ion batteries, and can solve the problems that organic solvents cannot be degraded or adsorbed

Pending Publication Date: 2019-06-14
CHINA ENFI ENGINEERING CORPORATION
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although spraying can effectively adsorb LiPF in the electrolyte 6 , but the organic solvent in the electrolyte cannot be degraded or adsorbed by spraying

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
  • Thermolysis method and thermolysis system of waste lithium ion battery
  • Thermolysis method and thermolysis system of waste lithium ion battery
  • Thermolysis method and thermolysis system of waste lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] use figure 1 and 2 The process and device in the treatment of waste ternary lithium-ion batteries:

[0058] Put the waste ternary lithium-ion battery into 2mol / L NaCl solution and discharge for 24h, and take out the battery to dry after discharge. Freeze the dried battery in a -80°C deep freezer for 3 hours to reduce the activity of its electrolyte. Take out the frozen battery, cut open the outer packaging shell of the battery under the protection of nitrogen gas, and take out the battery cell. Put 300g of battery cells into a tube furnace, raise the temperature to 650°C at a rate of 10°C / min under a nitrogen protection atmosphere of 0.8L / min, keep it warm for 3 hours, and then cool it down to room temperature naturally. The gas outlet of the tube furnace is connected to the activated carbon adsorption device and the alkali absorption device. The mass of activated carbon is 100g, and 2L of sodium hydroxide solution with a concentration of 2mol / L is installed in the a...

Embodiment 2

[0062] use figure 1 and 2 The process and device in the treatment of waste ternary lithium-ion batteries:

[0063] Put the waste ternary lithium-ion battery into 4mol / L NaCl solution and discharge it for 24h, and take out the battery to dry after discharge. Freeze the dried battery in a -60°C deep freezer for 8 hours to reduce the activity of its electrolyte. Take out the frozen battery, cut open the outer packaging shell of the battery under the protection of nitrogen gas, and take out the battery cell. Put 300g of battery cells into a tube furnace, raise the temperature to 600°C at a rate of 5°C / min under a nitrogen protection atmosphere of 1L / min, keep it warm for 5 hours, and then cool it down to room temperature naturally. The gas outlet of the tube furnace is connected to the activated carbon adsorption device and the alkali absorption device. The mass of activated carbon is 200g, and 2L of sodium hydroxide solution with a concentration of 4mol / L is installed in the alk...

Embodiment 3

[0067] use figure 1 and 2 The process and device in the treatment of waste ternary lithium-ion batteries:

[0068] Put the waste ternary lithium-ion battery into 1mol / L NaCl solution and discharge it for 24h, and take out the battery to dry after discharge. Freeze the dried battery in a -20°C deep freezer for 8 hours to reduce the activity of its electrolyte. Take out the frozen battery, cut open the outer packaging shell of the battery under the protection of nitrogen gas, and take out the battery cell. Put 300g of battery cells into a tube furnace, raise the temperature to 650°C at a rate of 20°C / min under a 0.2L / min nitrogen protective atmosphere, keep it warm for 1 hour, and then cool it down to room temperature naturally. The gas outlet of the tube furnace is connected to the activated carbon adsorption device and the alkali absorption device. The mass of activated carbon is 600g, and 2L of NaHCO with a concentration of 5mol / L is installed in the alkali absorption devi...

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
Concentrationaaaaaaaaaa
Login to View More

Abstract

The invention provides a thermolysis method and a thermolysis system of a waste lithium ion battery. The method comprises the following steps of S1, performing cooling treatment on the waste lithium ion battery, S2, removing an external packing shell of the cooled waste lithium ion battery under protection of nitrogen or inert gas to obtain a battery cell, S3, performing a pyrolytic reaction on the battery cell under the protection of the nitrogen or the inert gas to obtain a solid remainder and thermolysis gas, and S4, sequentially performing physical adsorption and alkali absorption on the thermolysis gas. With the adoption of the method, innocent treatment can be effectively performed on an electrolyte in the waste lithium ion battery.

Description

technical field [0001] The invention relates to the technical field of waste lithium ion battery treatment, in particular to a pyrolysis method and system for waste lithium ion batteries. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, small size, high specific energy, small self-discharge, and high safety. They are widely used in consumer electronics, electric vehicles, and industrial energy storage. Studies have shown that the charging cycle of lithium-ion batteries is about 500 times, and the service life is generally 3 to 5 years. With the rapid increase in the production and use of lithium-ion batteries, the number of waste lithium-ion batteries is also increasing. [0003] Lithium-ion batteries are mainly composed of positive electrodes, negative electrodes, separators, electrolytes, and outer packaging. The recycling processes of waste lithium-ion batteries at home and abroad can be divided into physical separation, pyrometallu...

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
IPC IPC(8): H01M10/0525H01M10/54
CPCY02W30/84Y02E60/10
Inventor 刘诚苟海鹏余跃陈学刚裴忠冶杜士帽
Owner CHINA ENFI ENGINEERING CORPORATION
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com