The main classifications of EV chargers are as follows:
(1) According to the different currents, it can be divided into DC charger and AC charger.
(2) According to the different powers, it can be divided into high-power chargers and low-power chargers.
(3) According to the different charging frequency, it can be divided into power frequency charger and high-frequency charger.
(4) In addition, there are negative pulse chargers, three-stage chargers, transformer chargers and switching power supply chargers, etc
Nowadays, the most widely used for EV charging are power frequency chargers and high-frequency chargers.
The characteristics of power frequency charger are: large size, large weight, high power consumption, but reliable performance and low price.
The characteristics of high-frequency charger are: small size, small weight, short charging time, good high-current discharge performance, high efficiency, intelligent activation function, which is conducive to the full dissolution, penetration and diffusion of battery activation substances, full and thorough electrochemical reaction and concentration polarization, basically completely activates and exerts the battery energy, and prolongs its service life, which is impossible for traditional thyristor chargers. The high-frequency charger truly embodies the characteristics of safe, fast, efficient and cost-effective charging technology.
In addition, with the progress of science and technology and people's continuous in-depth research on charger technology, many new chargers have emerged, such as: high-power intelligent high-frequency chargers, thyristor rectifier chargers, etc. On the basis of the original charger, they learn from each other's strengths and weaknesses, and have made great progress in charging efficiency, charging time, charging safety protection, and charging automation management, representing the trend and direction of future charger development.