Method for analyzing and testing charge-discharge performance and charge-discharge mechanism of lithium battery

A charge and discharge performance, analysis and testing technology, applied in the field of lithium battery charge and discharge test, can solve the problems of inability to cooperate with battery test equipment and high and low temperature test chambers, inability to effectively detect changes in electrode products, lack of versatility, etc., to achieve saving Expensive, reliable results, low-cost results

Inactive Publication Date: 2017-08-08
TIANJIN LIGHT IND VOCATION TECHN COLLEGE
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Problems solved by technology

[0003] However, X-ray diffractometers and in-situ X-ray diffractometers currently on the domestic market cannot effectively detect product changes in electrodes at different charging and discharging stages at different temperatures
The reason is: on the one hand, (in-situ) X-ray diffractometers are independent instruments and equipment, which cannot cooperate with battery testing equipment of d

Method used

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  • Method for analyzing and testing charge-discharge performance and charge-discharge mechanism of lithium battery
  • Method for analyzing and testing charge-discharge performance and charge-discharge mechanism of lithium battery
  • Method for analyzing and testing charge-discharge performance and charge-discharge mechanism of lithium battery

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Embodiment Construction

[0047] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0048] A method for analyzing and testing lithium battery charging and discharging performance and charging and discharging mechanism, such as figure 1 shown, including the following steps:

[0049] Step 1, making the electrode active material particles into lithium battery electrodes, performing X-ray diffraction analysis on the electrode active material particles and lithium battery electrodes respectively, and then assembling the lithium battery electrodes into lithium batteries;

[0050] The specific method of step 1 is: after performing X-ray diffraction analysis on the active material particles used to make lithium battery electrodes, use the electrode active material particles to make lithium battery electrodes; then perform X-ray diffraction analysis on lithium battery electrodes, and determine Whether the phase composition of the active m...

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Abstract

The invention relates to a method for analyzing and testing the charge-discharge performance and charge-discharge mechanism of a lithium battery. The method is technologically characterized by comprising the following steps: S1, making electrode active material particles into lithium battery electrodes, and assembling the lithium battery electrodes into a lithium battery; S2, preprocessing the lithium battery; S3, testing the charge-discharge performance of the lithium battery under different temperatures and currents; S4, setting cut-off points of the lithium battery charge-discharge process; S5, dismantling the lithium battery and stripping the electrodes in an inert gas environment; S6, making a X-ray diffraction analysis of the lithium battery electrodes under different cut-off points, and detecting the change in charge-discharge product of the lithium battery electrodes; and S7, deducing the mechnism of electrode reaction according to reaction mechanism equations of different cut-off points. The change of the active material in the charge-discharge process and the degree the electrochemical reaction reaches can be judged effectively, and the charge-discharge reaction mechanism of the battery can be studied.

Description

technical field [0001] The invention belongs to the technical field of lithium battery charge and discharge testing, and relates to lithium battery testing technology and staged characterization analysis technology, in particular to an analysis and testing method for lithium battery charging and discharging performance and charging and discharging mechanism. Background technique [0002] At present, lithium batteries have become a very promising new energy carrier due to their advantages such as small size, large capacity and stable working voltage. An in-depth understanding of the internal working principle of lithium batteries, the changes of active substances and the degree of reaction during the charging and discharging process of the battery is an important link in the design and development of lithium batteries. In the process of developing and preparing lithium batteries, it is necessary to analyze and test the performance of lithium batteries and the working principl...

Claims

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/378G01R31/385
Inventor 丁玮王建明李娜姚策
Owner TIANJIN LIGHT IND VOCATION TECHN COLLEGE
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