A lithium ion battery with a carbon material as a negative electrode and a lithium-containing compound as a positive electrode has no metal lithium in the charge and discharge process, and as long as lithium ions, this 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. The carbon as the negative electrode has a layered structure, and 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.
      Similarly, when the battery is discharged (ie, the process of using the battery), the lithium ions embedded in the carbon layer of the negative electrode are released and moved back to the positive electrode. The more lithium ions return to the positive electrode, the higher the discharge capacity. The battery capacity we generally refer to is the discharge capacity.
      The no-memory effect is also an outstanding advantage of lithium-ion batteries. It is not available in other secondary batteries. Lithium-ion batteries do not have to be used up before they are charged. The biggest feature of lithium batteries is their high specific energy.
      Generally, the charging current of a lithium ion 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, the excessive current is charged, the capacity is not full, and the electrochemical reaction inside the battery is required at the moment. Just like pouring beer, if it is too fast, it will bubble, but it will not be full.