Method and device for evaluating completeness of coating of shell core structure material of lithium ion battery
A technology of lithium ion battery and shell core structure, which is applied in the direction of material analysis by electromagnetic means, analysis of materials, secondary batteries, etc.
Active Publication Date: 2019-07-02
TSINGHUA UNIV
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[0005] The purpose of the present invention is to provide an evaluation method for the completeness of coating of lithium-ion battery shell and core structural materials to solve the problem that only microscopic characterization means can be used in the coating inspection of existing battery materials. Convenient and efficient, it can reflect the overall coating state of the material, shorten the overall research and development cycle, and improve the efficiency of screening excellent and defective products
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[0095] The following description and drawings illustrate specific embodiments of the invention sufficiently to enable those skilled in the art to practice them. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of embodiments of the present invention includes the full scope of the claims, and all available equivalents of the claims. Herein, various embodiments may be referred to individually or collectively by the term "invention", which is for convenience only and is not intended to automatically limit the scope of this application if in fact more than one invention is disclosed. A single invention or inventive concept. Herein, relational terms such as first and second etc. are used only to distinguish one entity or operation from another with...
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The invention discloses a method and device for evaluating the completeness of coating of a shell core structure material of a lithium ion battery. The method comprises: carrying out Raman map detection and conductivity detection on a shell core structure material respectively; and according to results of the Raman map detection and conductivity detection, acquiring an evaluation result of the coating completeness of the shell core structure material. According to the invention, because of the employed conventional macroscopic characterization ways, the measurement is convenient and the accurate result can be obtained quickly; the coating completeness of the electrode material can be determined accurately and comprehensively; and the accuracy is verified by the electrochemical test. The method is performed rapidly and efficiently; the obtained result is accurate and convenient; the electrochemical performance of the material can be predicted preliminarily accurately; the excellent products can be screened out and defective products can be removed; the subsequent meaningless testing is saved; the test and development cycle cost of the material is saved substantially; the efficiencyis improved; and thus the method and device have the great significance in screening, research and development and testing of the battery material.
Description
technical field [0001] The invention relates to the field of material detection, in particular to a method for evaluating the completeness of coating of lithium-ion battery shell-core structural materials. Background technique [0002] Since its inception, lithium-ion batteries have developed rapidly in recent years because of their advantages such as high energy density, high average output voltage, low self-discharge, and high safety. With the widespread use of lithium-ion batteries, the requirements for battery systems are getting higher and higher, and battery systems with high energy density and safety are becoming more and more popular. [0003] Among the components of the battery system, the battery material is undoubtedly the most critical part, because the main body of the charge and discharge reaction is the battery material, and its electrochemical reaction characteristics determine the upper limit of the battery material. Therefore, the development of new batter...
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IPC IPC(8): G01N21/65G01N27/04H01M10/0525
CPCG01N21/65G01N27/04G01N27/041H01M10/0525Y02E60/10
Inventor 肖哲熙魏飞于春辉林贤清
Owner TSINGHUA UNIV