In recent years, new energy vehicles have developed rapidly, but the problems of long range and difficult charging have become the main factors restricting their development. It is very effective to solve the range problem by improving the battery performance, and to solve the charging problem by popularizing charging piles. Next step New energy vehicle maintenance Xiao Bian will take you to understand how the DC charging pile and the AC charging pile operate when charging the electric vehicle!

Charging pile is a device for charging electric vehicles, which is divided into AC charging pile and DC charging pile, namely the so-called slow charging and fast charging. The AC charging pile is simply to connect the 220V power of the power grid directly to the electric vehicle for charging. For example, the household air conditioning socket can fully meet the requirements. A little more complicated is to add some control switches and human-computer interface processing on this basis. Charging can be controlled, including charging time, charging amount, startup, shutdown, protection and other measures. So AC charging is the same voltage as household electricity, only the charging current needs to be higher, and the wire needs to be slightly thicker.

When the AC charging pile is connected to the electric vehicle, the electric vehicle will change the AC power into DC power through the on-board rectification equipment to charge the battery on the vehicle.

In short, the DC charging pile is charged with DC voltage. The DC charging pile takes power through the power grid. The charging pile itself has an inverter, which converts AC power into DC power, and then directly connects to both ends of the battery of the electric vehicle. In order to prevent the battery from overcharging or uneven charging and other factors, the battery management system (BMS) is connected at both ends of the battery, which is the core technology of DC charging. It can be said that this is the battery manager, which can prevent many unsafe factors and improve the performance and life of the battery.

DC charging post adds a lot of safety detection and control, which greatly improves the security of charging. Since the DC charging pile directly adds DC power to both ends of the battery, the charging current can be set very large, so the charging time can be greatly shortened.

The relevant contents about how the AC and DC charging piles work have been introduced in great detail above. The AC charging piles are convenient, compact, and don't need too much fuss. They can be installed in garages, charging stations and other places, taking up little space. Moreover, the DC charging pile is very large, and the general equipment will be fixed in charging stations and other charging stations, occupying a large space, and the equipment price will be much higher.