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A gas collection method for internal gas analysis of lithium-ion batteries

A lithium-ion battery and gas technology, applied in the analysis of materials, sampling, instruments, etc., can solve the problems of external impurity gas mixing, achieve convenient analysis, convenient collection, and realize the effect of gas production composition and mechanism analysis

Active Publication Date: 2020-04-17
HEFEI GUOXUAN HIGH TECH POWER ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of mixing in external impurity gases when using conventional gas collection methods, and to provide a gas collection method for internal gas analysis of lithium-ion batteries

Method used

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  • A gas collection method for internal gas analysis of lithium-ion batteries
  • A gas collection method for internal gas analysis of lithium-ion batteries

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Embodiment Construction

[0014] In order to better understand the present invention, the present invention will be further described below in conjunction with the examples and accompanying drawings, and the following examples are only to illustrate the present invention rather than limit it.

[0015] Step 1: Seal the inner core 1 of the lithium-ion battery to be analyzed with an aluminum-plastic film 2 soft package.

[0016] Step 2. After the sealing is completed, bake the battery, inject liquid, and perform the first packaging along the first packaging line (such as figure 1 ), the package is completed and put on hold.

[0017] Step 3. After putting aside for a certain period of time, carry out tests on the battery for formation, capacity separation, heating, overcharging, overdischarging or other possible gas production.

[0018] Step 4. Select the stage to be analyzed and tested. Clamp the aluminum-plastic film 2 with the external pressure 4 and then perform secondary packaging along the secondary...

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Abstract

The invention relates to the field of detection of a lithium battery, and particularly relates to a gas collection method used for analysis of gas production inside the lithium battery. An inner core of the to-be-analyzed lithium battery is subjected to a gas production test after being primarily packaged by an elastic sealing material, the analysis stage is chosen, the elastic sealing material is secondarily packaged after being clamped along the periphery of the inner core of the lithium battery, and then the produced gas is stored and packaged into a gas pocket. According to the technical scheme, the gas produced by the soft packaged lithium battery is conveniently collected, the foreign gas is avoided, and the in-situ analysis of a component is facilitated. The gas pocket is substantially in-site collection of the gas, meanwhile, the free position transfer of the gas pocket is implemented, so as to be favorable for the test on an analytical instrument like a gas chromatograph, as well as the in-site analysis of the produced gas composition and the mechanism of the lithium battery.

Description

technical field [0001] The invention relates to the field of lithium-ion battery detection, in particular to a gas collection method for analyzing gas produced inside the lithium-ion battery. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, long charge and discharge life, less environmental pollution, and low self-discharge efficiency. In recent years, it has gradually moved from mobile phones, notebooks, digital cameras, etc. to the field of electric vehicle power. With the rapid development of lithium-ion batteries, the requirements for battery energy density are getting higher and higher, and the remaining space of the battery is getting smaller and smaller. Once abnormal gas is generated inside the lithium-ion battery, it will cause battery expansion, deformation, leakage, and life expectancy. Attenuation, energy loss and other serious damage. Therefore, it is very important to analyze the composition and mechanism of gas product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/22
CPCG01N1/2226
Inventor 魏家兴张佳瑢张春艳范吉峰
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
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