Generally, the \"slow charge\" used is basically AC charging, and the \"fast charge\" mostly uses DC charging. The former has lower charging efficiency, while the latter has higher charging efficiency.
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Ac charging: A power supply device that is fixed outside the electric vehicle and connected to the AC power grid to provide AC power to the on-board charger of the electric vehicle. Provides only power output, no charging function, plays the role of a control power supply.
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Dc charging: mainly installed in a large charging station, connected to the power grid in a three-phase four-wire system, can provide sufficient power, and the output voltage and current adjustment range is large.
fast charge
The normal charging time of the battery is about 10 ~ 20h, and how to charge the battery quickly without damaging the performance and life is a hot research topic. After the output voltage is set (such as 36V), if the charging bottle plate falls off and is disconnected, causing a group of batteries to be blocked, or a short circuit occurs, the battery terminal voltage is reduced or zero, then the charger will have no output current.
Dc is fast charging, the fast charging pile is DC, and the AC charging pile is slow charging.