The main difference between the two is that the charging current and power of slow charging are relatively small, which has little impact on the service life of the power battery itself. Fast charging requires large current and power, which will have some impact on the life of the power battery pack. In addition, supporting facilities are needed. At present, most of the fast charges can be filled with 80% of the electricity in half an hour. The charging time of slow charge is generally 6-8 hours. Finally, the household 220V can be charged slowly, and fast charging can not be done.