Electrochemical matching rapid evaluation method

Abstract

The invention provides an electrochemical matching rapid evaluation method. The method comprises the following steps: coating, piece preparing, laminating and packaging, liquid injecting and testing.A complete battery system is evaluated and verified in a full battery form; a single battery is manufactured by adopting a lamination mode of a single-layer positive plate and a single-layer negativeplate, so that the manufacturing period is shortened, the manufacturing difficulty and cost are reduced, and the test efficiency is improved; and the rapid evaluation of the electrochemical matching of the battery material is realized, the matching of the positive and negative electrode materials of the lithium ion battery and the electrolyte can be accurately and rapidly evaluated, and the firstefficiency and capacity exertion of the lithium ion battery can be rapidly evaluated.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a rapid evaluation method for electrochemical matching. Background technique [0002] At present, the new energy industry is developing rapidly. Lithium-ion batteries have become the main medium of important electric energy storage. They have high energy density, high output voltage, excellent cycle performance, small self-discharge, and low environmental pollution. People's attention. Lithium-ion batteries are composed of positive electrodes, negative electrodes, diaphragms, and electrolytes. The electrochemical performance of batteries is determined by various materials such as positive and negative electrodes and electrolytes, as well as complex manufacturing processes and process parameters. Therefore, in order to obtain batteries with good performance, it is necessary to Evaluation of battery materials and coordination systems is also necessary. ...

AI Technical Summary

Problems solved by technology

Among them, the electrochemical workstation focuses on the mechanism research of material reaction, and is more used in scientific research institutions; the button battery test is a method for quickly evaluating the electrical properties of battery materials, and is more used in the research and development of lithium-ion battery positive or negative electrode materials. The button battery has strict environmental requirements in the production process and needs to be carried out in an anaerobic and dry environment, and the production process level of the button battery directly affects the performance of the battery and the accuracy of the test data. In addition, the button battery test consistency Poor, unable to reflect the true characteristics of some materials; symmetrical batteries are batteries assembled with the same polarity, and are mostly used to evaluate the performance of electrode materials in different states of lithium-ion batteries, suitable for activated batteries such as pre-charged batteries. Cells after formation, cycle, short-term test and failure analysis are used to evaluate the impedance of electrode materials and screen low-impedance materials; evaluate the ionic conductivity of solid electrolytes, etc.; the production and test cycles of soft-pack batteries are long, which is harmful to equipment and The production line has certain requirements, and the cost of material performance evaluation and matching research is relatively high

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