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Closed sampling method of lithium ion battery electrolyte

A lithium-ion battery, electrolyte technology, applied in the direction of sampling devices, etc., to avoid material waste, easy to operate, easy to operate

Inactive Publication Date: 2015-06-17
TIANJIN JINNIU POWER SOURCES MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Analysis and testing are the eyes of industrialized production. The reliability of test data needs to be guaranteed by samples that can represent the product. The electrolyte has such a high standard requirement for moisture and free acid content, and the electrolyte is easy to absorb moisture in the environment. Electrolyte products are not disturbed by the external atmosphere, and the sampling work that accurately reflects the quality of the product poses a challenge

Method used

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  • Closed sampling method of lithium ion battery electrolyte
  • Closed sampling method of lithium ion battery electrolyte
  • Closed sampling method of lithium ion battery electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0021] A kind of airtight sampling method of electrolyte for lithium ion battery, comprises the following steps process:

[0022] (1) Clean the airtight sampler and the airtight sampler and dry them for later use;

[0023] (2) Connect one end of the airtight sampler to the pipeline, storage tank, and packaging barrel equipment to be sampled through the corresponding quick connector, and connect the other end of the airtight sampler to the airtight sampler through the corresponding quick connector;

[0024] (3) Open the valve of the airtight sampler, and then pressurize the equipment. The electrolyte enters the airtight sampler through the quick connector and then enters the airtight sampler. During the sampling process, the airtight sampler is continuously exhausted through the quick connector until the airtight sampler filled with electrolyte;

[0025] (4) Finally close the equipment valve, close the airtight sampler valve, unplug the airtight sampler from the equipment and ...

Embodiment 2

[0027] Use a 500ml PTFE beaker to take an appropriate amount of electrolyte from the electrolyte storage tank, and place it with the open mouth in an environment with a temperature of 25±0.5°C and a relative humidity of 60±2% for electrolyte storage experiments. The electrolyte moisture and free acid (calculated as HF) content were detected at different times, and the experimental data are shown in Table 1.

[0028] Table 1: Experimental data of electrolyte storage in the open

[0029]

Embodiment 3

[0031] Use a conventional sampling bottle with a cover to sample twice from the electrolyte preparation system, storage tank and electrolyte packaging barrel respectively. During the sampling process, the moment the electrolyte sample flows into the sampling bottle, it contacts with the air, and the cap of the bottle is tightened after sampling. Each sample was repeatedly tested and analyzed for moisture and free acid (calculated as HF) content. See Table 2 for the experimental data.

[0032] Table 2: Experimental data of conventional sampling methods

[0033]

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Abstract

The purpose of the invention is providing a closed sampling method of a lithium ion battery electrolyte. A closed sampler for realizing the method comprises rapid joints, a sampler ball vale and a bottle body, the upper portion of the bottle body is provided with the sampler ball valve, and two sides of the sampler ball valve are provided with the rapid joints. Compared with original open sampling, the closed sampling method has the following obvious advantages: waste of a large amount of a material is avoided, and problems of discharging and flushing of the closed sampler are solved; the material floes in a closed state in the operating process, so a sample is not interfered by extraneous environment factors, and the quality of the sample is guaranteed; and the rapidly joints are respectively connected with an apparatus to be sampled and a sampling bottle, and the sampler ball valve is opened and closed to sample, so sampling is simple and convenient, and is convenient to operate.

Description

technical field [0001] The invention relates to the technical field of physical and chemical analysis operations, and belongs to a closed sampling method for volatile and moisture-sensitive liquid organic chemical raw materials and products, in particular to a closed sampling method for an electrolyte used in a lithium-ion battery. Background technique [0002] Lithium-ion batteries are a new generation of green, environment-friendly and high-energy batteries. In recent years, relying on their own comprehensive advantages, the output of lithium-ion batteries has grown rapidly, and their application fields have continued to expand. The development of aerospace and wider fields has become a high-tech product of great significance to the national economy and people's life in the 21st century. [0003] Electrolyte is one of the four key materials of lithium-ion batteries (positive electrode, negative electrode, diaphragm, and electrolyte). It is known as the "blood" of lithium-i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/10
Inventor 桑俊利赵庆云郭西凤张丽红
Owner TIANJIN JINNIU POWER SOURCES MATERIAL
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