As an energy supply device for electric vehicles, the charging performance of electric vehicle EV Chargers is related to the service life and charging time of the battery pack. This is also one of the aspects that consumers are most concerned about before buying electric vehicles. The basic principle of electric vehicle charger design is to achieve fast, efficient, safe and reasonable power supply to power batteries. In addition, the applicability of chargers to various power batteries must also be considered.
The control system of the fast charger consists of:
The control system of the fast charger
It adopts an intelligent variable pulse charging method, that is, it adopts charging current pulses, including charging pulses T1, intermittent pulses T2 and discharge pulses T3.
The solution of the charger in the ground charging station
The solution of the charger in the ground charging station, the charger consists of a rectifier that can convert the input AC power into DC power and a power converter that can adjust the DC power. By inserting the plug with a wire into the matching socket on the electric vehicle, DC power is input into the battery to charge it. The charger is equipped with a locking lever to facilitate the insertion and removal of the plug, and the lever can also provide a signal to confirm that it has been locked to ensure safety. According to the communication between the charger and the battery management system on the vehicle, the power converter can adjust the DC charging power online, and the charger can display the charging voltage, charging current, charging amount and charging cost. This is only the basic principle of the EV Chargers. Many details should be continuously improved in practical applications to obtain the most convenient use solution.