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Novel method for producing electrolyte of lithium ion battery

A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of high heat preservation energy consumption, increase energy consumption, increase process time, etc., to improve production efficiency, reduce overall costs, The effect of low internal resistance

Active Publication Date: 2016-12-21
宁德市凯欣电池材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insulation of storage tanks and pipelines consumes a lot of energy. However, in the process of electrolyte preparation, the temperature of the solvent needs to be controlled at about 10°C. Therefore, after the EC enters the preparation kettle, further cooling treatment is required. consumption, while increasing process time

Method used

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  • Novel method for producing electrolyte of lithium ion battery
  • Novel method for producing electrolyte of lithium ion battery
  • Novel method for producing electrolyte of lithium ion battery

Examples

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specific Embodiment approach

[0024] A new method for producing lithium-ion battery electrolyte. Before producing and preparing lithium-ion battery electrolyte, first mix EC and at least one organic solvent required for preparing lithium-ion battery electrolyte according to 50%-80%: 20% -50% mass fraction ratio pre-mixed into an EC mixed solvent with a melting point less than or equal to 20°C, store or transport the EC mixed solvent at room temperature; when producing and preparing lithium-ion battery electrolyte, then add the EC mixed solvent to the Prepare in a reaction vessel.

[0025] Further, the other at least one organic solvent required for preparing the lithium-ion battery electrolyte is formed by mixing one or two or more of DMC, DEC or EMC in any proportion.

[0026] Further, when producing and preparing the lithium-ion battery electrolyte, electrolyte lithium salt and additives are also added, and the mass percent content of the EC mixed solvent in the lithium-ion battery electrolyte is 20-60%;...

Embodiment 1

[0041] A new method for producing lithium-ion battery electrolyte. Before producing and preparing lithium-ion battery electrolyte, EC and other at least one organic solvent required for preparing lithium-ion battery electrolyte are mixed according to the mass fraction of 80%: 20%. After pre-mixing into an EC mixed solvent with a melting point of less than or equal to 20°C, the EC mixed solvent is stored or transported at room temperature; when producing and preparing lithium-ion battery electrolyte, the EC mixed solvent is then added to the reaction container for preparation.

[0042] The at least one organic solvent required to prepare the lithium-ion battery electrolyte is DMC.

Embodiment 2

[0044] A new method for producing lithium-ion battery electrolyte. Before producing and preparing lithium-ion battery electrolyte, EC and other at least one organic solvent required for preparing lithium-ion battery electrolyte are mixed according to the mass fraction of 50%:50%. After pre-mixing into an EC mixed solvent with a melting point of less than or equal to 20°C, the EC mixed solvent is stored or transported at room temperature; when producing and preparing lithium-ion battery electrolyte, the EC mixed solvent is then added to the reaction container for preparation.

[0045] The at least one organic solvent required for other preparations of the lithium-ion battery electrolyte is provided by DEC.

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Abstract

The invention relates to a novel method for producing an electrolyte of a lithium ion battery. The novel method is characterized by comprising the following steps of mixing EC and at least one organic solvent required for preparation of the electrolyte of the lithium ion battery in advance to form an EC mixed solvent with a melting point less than or equal to 20 DEG C according to a mass percentage being (50-80)%:(20-50)% before the electrolyte of the lithium ion battery is produced and prepared, and preserving or transporting the EC mixed solvent in a normal temperature; and adding the EC mixed solvent to a reaction container for preparation when the electrolyte of the lithium ion battery is produced and prepared. The melting point of the EC-containing mixed solvent containing the of the electrolyte of the lithium ion battery is smaller than 20 DEG C, and the mixed solvent is in a liquid state in a normal-temperature state; and during the preparation process of the electrolyte, EC is not needed to be preserved and then cooled, the cooling time of the solvent can be saved, moreover, the throw-in time of a lithium salt can be reduced, the separate input time of the solvent can be reduced, the production efficiency is improved, the integral cost of the electrolyte is reduced, and the novel method has great significance to industrial production of the electrolyte.

Description

technical field [0001] The invention belongs to the technical field of manufacturing electrolyte materials for lithium ion batteries, and in particular relates to a new method for producing electrolytes for lithium ion batteries. Background technique [0002] The solvents of lithium-ion battery electrolytes currently on the market include DMC (dimethyl carbonate), DEC (diethyl carbonate), EMC (ethyl methyl carbonate), EC (ethylene carbonate), etc., EC is in each formula A substance that will always be contained in the system, but the melting point of EC is 35-38°C, and it is a crystalline solid at room temperature, so it must be kept warm during the entire storage and use process to ensure that it will not crystallize. Insulation of storage tanks and pipelines consumes a lot of energy. However, in the process of electrolyte preparation, the temperature of the solvent needs to be controlled at about 10°C. Therefore, after the EC enters the preparation kettle, further cooling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567
CPCH01M10/0567Y02E60/10
Inventor 温雄廖帅玲王盛吴良煜
Owner 宁德市凯欣电池材料有限公司
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