Lithium battery regular degree grading evaluation method for computed tomography detection
A technology of tomography and evaluation methods, applied in sorting and other directions, can solve problems such as performance degradation, irregular internal structure, electrode fracture, etc., achieve the effect of increasing stability and safety, and promoting the improvement of battery technology level
Active Publication Date: 2019-08-30
CHINA AUTOMOTIVE TECH & RES CENT +1
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Problems solved by technology
Batteries with irregular, uneven, and defective internal structures will have uneven thermal fields and uneven current densities during use. After long-term use, safety hazards such as electrode breakage and micro-internal short circuits are prone to occur, resulting in rapid performance. fall or safety accident
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[0035] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0036] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0037] The present invention proposes that the present invention proposes a method for grading and evaluating the internal regularity of lithium batteries for computerized tomography detection, such as figure 1 shown, including the following steps:
[0038] 1. Li-ion battery pretreatment
[0039] The lithium-ion battery is charged and discharged according to the demand, and the state of charge of the battery is adjusted. If there is no special requirement, the state of charge can be adjusted to 100% to achieve the best test results.
[0040] 2. Lithium-ion battery internal regularity test
[0041] 2.1 Computed tomography test
[0042] The lithium-ion battery sample is subjected to a...
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The invention provides a lithium battery regular degree grading evaluation method for computed tomography detection. The lithium battery regular degree grading evaluation method for the computed tomography detection specifically includes following steps: pretreating a lithium ion battery; performing computed tomography tests on the lithium ion battery sample, and obtaining an inner section image of the lithium battery; measuring distance of electrode layers, and obtaining difference of distance data of a cathode and an anode; establishing regular degree evaluation criterion of the internal structure of the power battery, and performing result evaluation. The lithium battery regular degree grading evaluation method for the computed tomography detection can analyze and evaluate the regular degree of the internal structure of the lithium ion battery by performing the computed tomography tests on the lithium ion battery, finds out a vantage point and a weakness point of the inner regular degree of the battery, promotes technological level improvement of the battery, and improves stability and safety of the lithium ion battery for consumer electronics and electric automobiles.
Description
technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a method for grading and evaluating the internal regularity of a lithium battery for computerized tomography detection. Background technique [0002] Lithium-ion batteries were first invented in 1976 by Whittingham et al. Then in 1981, Bell Laboratory successfully made lithium-ion batteries using graphite as the negative electrode material, which solved the storage difficulties, high cost, and harsh conditions caused by the use of lithium sheets as the negative electrode in the past. In 1991, SONY Corporation of Japan manufactured commercial lithium-ion batteries for the first time and began the commercial application of lithium-ion batteries. Commercial lithium-ion batteries are mainly composed of positive electrodes, separators, negative electrodes and electrolytes. The positive electrode material of the lithium-ion battery is mainly a lithium-rich material, wh...
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Login to View More IPC IPC(8): B07C5/34
CPCB07C5/34
Inventor 马天翼王芳刘仕强樊彬韦振陈立铎刘磊姜成龙
Owner CHINA AUTOMOTIVE TECH & RES CENT