battery Charging And Discharging Principle

The working principle of lithium-ion batteries refers to its charging and discharging principle.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 used as the negative electrode has a layered structure with 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 (that is, the process when we use the battery), the lithium ions embedded in the carbon layer of the negative electrode are released and move back to the positive electrode.The more lithium ions that return to the positive electrode, the higher the discharge capacity.What we usually call battery capacity refers to the discharge capacity.It is not difficult to see that during the charging and discharging process of lithium-ion batteries, lithium ions are in a state of movement from positive electrode → negative electrode → positive electrode.If we compare the lithium-ion battery to a rocking chair, the two ends of the rocking chair are the poles of the battery, and the lithium ions are like excellent athletes, running back and forth on both ends of the rocking chair.So, experts gave the lithium-ion battery a cute name: rocking chair battery.