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Introduction to the working principle of lithium ion battery charging and discharging
Jul 26, 2018

With the increasing use of lithium-ion batteries, mobile phones, computers, electric vehicles and other tools are inseparable from lithium batteries. If the energy wall in the movie "Trath" indicates the future, lithium batteries will become modern. The core of life at home.

At present, "lithium battery" covers a wide range of technologies, but the difference is also very large. The familiar "lithium battery" is actually a "lithium-ion battery", which relies on the intercalation of lithium ions between the positive and negative electrodes. And swim out, realize the mutual conversion of chemical energy and electric energy. According to this, the process of charging and discharging is realized.

According to the difference of positive and negative materials, there are many kinds of lithium ion batteries. At present, the positive and negative electrodes of mainstream batteries are mainly used: lithium cobaltate, lithium manganate and ternary materials, and graphite for the negative electrode. When charging, the lithium ions in the positive electrode pass through. The electrolyte swims to the negative electrode and is embedded in the inner layer of graphite. When discharging, lithium ions pass through the electrolyte from the inner layer of the negative electrode and then travel to the positive electrode material. The positive and negative materials store the lithium ion capacity. The lithium removal, lithium insertion The larger the difference, the higher the energy density of the battery. Therefore, when the battery is normally detected, the internal resistance of the battery is as small as possible, so that the lithium ion deionization and lithium insertion of the battery are better, and the battery is charged and discharged. It is more complete, that is, what we usually say, the battery has good durability and good quality.


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