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Structure And Working Principle Of Lithium Ion Battery

Dec. 16, 2019
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18650  lithium ion battery supplier to share with you: lithium ion battery is a secondary battery with two reversibly embedded and de-embedded lithium ion compounds as the anode and cathode.People will rely on the transfer between the positive and negative lithium ions to complete the battery charging and discharging work, the unique mechanism of lithium ion battery is known as "rocking chair battery", commonly known as "lithium battery".

Lithium ion batteries (LIB) and polymer lithium ion batteries (LIP) are divided into two categories according to the electrolyte materials used in lithium ion batteries.

Both liquid lithium ion batteries and polymer lithium ion batteries use the same anode and cathode materials as liquid lithium ions, and the battery works on the same principle.Generally, the positive electrode USES LiCoO2, while the negative electrode USES a variety of carbon materials such as graphite, while aluminum and copper are used as collecting fluids.

The main difference is in the electrolyte. Lithium-ion batteries use a liquid electrolyte, while lithium-ion polymer batteries use a polymer electrolyte, which can be "dry" or "colloidal".

Lithium-ion polymer batteries use colloidal electrolytes that do not leak like liquid fluids, so assembly is easy, making the overall battery very light and thin.Also will not produce leakage and combustion explosion and other safety issues, so you can use aluminum-plastic composite film to make the battery shell, which can improve the specific capacity of the whole battery;Polymer lithium-ion batteries can also be used as a cathode material, and their mass to energy ratio will be more than 50 percent higher than current liquid lithium-ion batteries.In addition, polymer lithium ion batteries are better than liquid lithium ion batteries in operating voltage, charge and discharge cycle life.Based on these advantages, polymer lithium ion batteries are known as the next generation of lithium ion batteries.

The operating principle of high temperature resistance 18650 battery is the principle of charge and discharge.When the battery is recharged, lithium ions are formed at the positive end of the battery, and the resulting lithium ions travel through the electrolyte to the negative end.The negative carbon has a layered structure, and it has many micropores. The lithium ions that reach the negative electrode are embedded in the micropores of the carbon layer. The more lithium ions are embedded, the higher the charging capacity.In the same way, when the battery is discharged (the process by which we use the battery), the lithium ions embedded in the negative carbon come out and move back to the positive. The more lithium ions go back to the positive electrode, the higher the discharge capacity.What we usually mean by battery capacity is discharge capacity.It is not difficult to see that during the charging and discharging process of lithium ion battery, lithium ion is in the motion state from positive electrode to negative electrode to positive electrode. If we compare the lithium ion battery to a rocking chair, the two ends of the rocking chair are the two poles of the battery, and lithium ion, like a good athlete, runs back and forth between the two ends of the rocking chair. So, experts have given lithium-ion batteries a cute name: rocking-chair batteries.

The 18650 cylindrical battery is an alternative to the lithium metal battery that emerged a few years ago. Its anode USES a carbon pole that traps lithium ions.Lithium ions move between the anode and cathode, and the electrode itself does not change.This is the lithium ion battery and lithium metal battery in essence of the difference.Lithium ion batteries have graphite crystals at the anode and lithium dioxide at the cathode.During charging, the lithium atoms in the cathode ionize into lithium ions and electrons, and the lithium ions move toward the anode to synthesize lithium atoms with electrons.During the discharge, lithium atoms are ionized from the anode surface of the graphite crystal to lithium ions and electrons, and lithium atoms are synthesized at the cathode. So, lithium is always present in the form of lithium ions, not lithium metal, so this kind of battery is called lithium ion battery.

18650 Cylindrical Battery

18650 Cylindrical Battery


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