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The principle of working lithium-ion batteries

From:CTECHI GROUP Limited     Release time:2019-11-21

Overview:Lithium-ion battery A lithium battery with a lithium-containing compound as a positive electrode.

The principle of working lithium-ion batteries

Lithium-ion battery A lithium battery with a lithium-containing compound as a positive electrode. In the process of charging and discharging, no metal lithium exists, only lithium ions, which is a lithium ion battery. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. During the charge and discharge process of Li-ion Batteries, lithium ions are in a state of motion from positive electrode to negative electrode to positive electrode. Li-ion Batteries are like a rocking chair. The ends of the rocking chair are the two poles of the battery, and the lithium ion runs back and forth like an athlete. So Li-ion Batteries is also called a rocking chair battery.

When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte. The carbon as the negative electrode has a layered structure, and it has many micropores. The lithium ions reaching the negative electrode are embedded in the micropores of the carbon layer, and the more lithium ions are embedded, the higher the charging capacity is. Similarly, when the battery is discharged (ie, the process we use the battery), the lithium ions embedded in the carbon layer of the negative electrode come out and move back to the positive electrode. The more lithium ions return to the positive electrode, the higher the discharge capacity.

Generally, the charging current of the lithium battery is set between 0.2C and 1C. The larger the current, the faster the charging and the greater the heat of the battery. Moreover, excessive current charging, the capacity is not full, because the electrochemical reaction inside the battery takes time. Just like pouring beer, if it is too fast, it will produce bubbles, but it will not be full.


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