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Lithium ion battery electrolyte purification device and purification method

A technology for a lithium ion battery and a purification method, which is applied in the field of lithium ion battery electrolyte purification devices, can solve the problems of exceeding the standard, the electrical performance and safety performance of the lithium ion battery are reduced, and achieves simple operation, short purification time and less by-products. Effect

Inactive Publication Date: 2019-03-15
薛利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the unfiltered molecular sieve debris (containing K, Na, Al, Si, O and other impurity elements) will also react with the components in the electrolyte, causing impurity elements such as K, Na, Al, Si, O, etc. Exceeding the standard, resulting in the reduction of the electrical performance and safety performance of the lithium-ion battery

Method used

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  • Lithium ion battery electrolyte purification device and purification method
  • Lithium ion battery electrolyte purification device and purification method
  • Lithium ion battery electrolyte purification device and purification method

Examples

Experimental program
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Embodiment 1

[0040] Such as figure 1 As shown, this embodiment provides a lithium ion battery electrolyte purification device, including an electrolyte storage tank 1, a circulating pump 2, an electrochemical treatment storage tank 3, a filter 4, and an electrolyte receiving tank 5, and an electrolyte storage tank 1 The circulating pump 2, the electrochemical treatment storage tank 3, and the filter 4 are sequentially connected through a pipeline to form a circulation loop, and the electrolyte receiving tank 5 and the filter 4 are connected through a pipeline. Several electrode groups are arranged in the electrochemical treatment storage tank 3, and the several electrode groups are all composed of a positive electrode sheet, a negative electrode sheet, and a separator spaced between the positive electrode sheet and the negative electrode sheet. Several electrode groups are provided with a positive terminal and a negative terminal for connection with an external power source. Both the elect...

Embodiment 2

[0048] The difference from Embodiment 1 is that in the purification method of this embodiment, the voltage of the electrochemical treatment storage tank 3 in step 2 is set to 12V.

[0049] The rest is the same as in Embodiment 1, and will not be repeated here.

Embodiment 3

[0051] The difference from Embodiment 1 is that in the purification method of this embodiment, the voltage of the electrochemical treatment storage tank 3 in step 2 is set to 36V.

[0052] The rest is the same as in Embodiment 1, and will not be repeated here.

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Abstract

The present invention relates to the technical field of purification of an electrolyte, and particularly relates to a lithium ion battery electrolyte purification device, comprising an electrolyte storage tank, a circulation pump, an electrochemical treatment storage tank, a filter and an electrolyte receiving tank, wherein the electrolyte storage tank, the circulation pump, the electrochemical treatment tank and the filter are sequentially connected through a pipe and form a circulation loop, and the electrolyte receiving tank and the filter are connected through a pipe. In addition, the present invention also provides a lithium ion battery electrolyte purification method, which purifies a lithium ion battery electrolyte through the electrochemical treatment tank; then filters through thefilter; and transfers to the electrolyte receiving tank when satisfying set target requirements, returns to the electrochemical treatment tank when not satisfying the set target requirements and performs electrochemical treatment until meeting the requirements. Compared with the prior art, the method realizes separation and removal of impurity ions; does not introduce chemical raw materials, hashigh yield, and less by-products; has a purification rate that is more than 96%, and improves quality of the product.

Description

Technical field [0001] The invention belongs to the technical field of electrolyte purification, and in particular relates to a lithium ion battery electrolyte purification device and purification method. Background technique [0002] Lithium-ion batteries are green, high-energy and environmentally friendly batteries that have attracted much attention in recent years. Among them, lithium-ion battery electrolyte is an important part of lithium-ion batteries, and its quality directly affects battery performance. In particular, the purity, acidity and water content of the electrolyte directly affect the performance of the battery. [0003] In order to improve the purity of the electrolyte and reduce the acidity and water content, people will purify the lithium-ion battery electrolyte. The currently used lithium ion electrolyte purification method is generally distillation or molecular sieve dehydration. The distillation method can only realize the purification of a single special s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/058
CPCH01M10/058Y02E60/10Y02P70/50
Inventor 薛利
Owner 薛利