How do DC charging piles and AC charging piles work during the charging process of electric vehicles?

In recent years, the development of new energy vehicles has become faster and faster, and the main factors limiting the development of new energy electric vehicles are cruising range and charging problems. The cruising range should be solved by improving the battery performance, and the solution to the charging problem should be achieved by the popularization of charging piles. Let's take you to understand how DC charging piles and AC charging piles work in the process of charging electric vehicles!
Charging pile is a kind of equipment for charging electric vehicles, which is divided into AC charging pile and DC charging pile, which is the so-called slow charging and fast charging. The AC charging pile is simply to directly connect the 220V electricity of the grid to the electric vehicle for charging, like the household air conditioning socket can fully meet the requirements. What is slightly more complicated is to add some control switches and human-machine interface processing on this basis. Charging can be controlled, including charging time, charging volume, and measures such as start-up shutdown and protection. Therefore, AC charging is the same voltage as household electricity, but the charging current needs to be larger, and the wire is slightly thicker.
When the AC charging pile is connected to the electric vehicle, the electric vehicle will change the alternating current into direct current through the on-board rectifier device to charge the battery on the vehicle.
DC charging pile simply means that the charging voltage is DC, DC charging pile takes power through the power grid, and the charging pile itself has an inverter, which changes alternating current to direct current, and then directly connects to both ends of the battery of the electric vehicle. In order to prevent the emergence of factors such as battery overcharge or uneven charging, there is a battery management system (BMS) at both ends of the battery, which is the core technology of DC charging, it can be said that this is the battery steward, which can prevent many unsafe factors and improve the performance and life of the battery.
DC charging pile adds a lot of safety detection and control, which greatly improves the safety of charging. Since the DC charging pile directly applies DC power to both ends of the battery, the charging current can be set very large, so the charging time can be greatly shortened.