The difference between slow charging and fast charging is that the main body, circuit characteristics, principles and charging methods are different. Slow charge refers to AC charging, the use of lower power direct current to supplement the battery and other equipment, charging power is generally between 3kw and 7kw; The fast charge refers to high-power DC charging, using high-power DC to charge, the fastest can be charged to 80% within half an hour. Fast charging and slow charging have their own advantages and disadvantages. Fast charging takes up a short time, but it will have a great impact on the battery pack. Too fast charging speed may lead to battery deficiency and aging. Slow charge charges the battery at a lower speed, with high safety but a longer charging time1.