When charging the lithium battery pack, pay attention not to “overcharge”, because the lithium battery pack will generate a certain amount of heat during the charging process. If the heat is not distributed in time, the lithium battery temperature will be too high, which may cause overheating. However, if the temperature of lithium battery pack is too high, it will accelerate the loss rate of lithium battery and reduce its service life. Therefore, it is necessary to pay attention not to let the internal temperature of lithium battery pack exceed the normal temperature during charging. At the same time, the lithium battery pack cannot be charged for too long. Because too long time will also cause loss to the lithium battery, especially the over-discharge phenomenon in the charging process will have a greater impact on the life of the lithium battery. If the battery is discharged continuously during charging for a long time, it is easy to cause damage to the lithium battery. Therefore, in order to ensure its service life, we need to avoid discharging for a long time during charging.