Comparison of DC Charging Solution and AC Charging Solution

EV Chargers are generally divided into AC charging stations and DC charging stations. The biggest difference or the only difference between the two ev chargers is that one belongs to slow charging and the other belongs to fast charging. It only takes 1-2 hours for the DC charging pile to fully charge the electric vehicle，and 6-7 hours for ac ev chargers. Various types of electric vehicles have a maximum allowable charging current limit when charging, and the battery capacity is also different, resulting in a large difference in the time required for full charging.

Considering the charging time, DC charging piles have great advantages, and the fast charging time is particularly attractive. However, considering various factors, the two types of charging piles have their own application scenarios.

AC charging station

AC electric vehicle charging station, commonly known as "slow charging", is fixedly installed outside the electric vehicle and connected to the AC power grid to provide AC power for the electric vehicle on-board charger (that is, the charger fixedly installed on the electric vehicle) power supply unit. The AC charging pile only provides power output and has no charging function. It needs to be connected to the on-board charger to charge the electric vehicle. It is equivalent to just playing a role in controlling the power supply.

DC charging station

DC electric vehicle charging station, commonly known as "fast charging", is a power supply device that is fixedly installed outside the electric vehicle and connected to the AC power grid to provide DC power for the power battery of off-board electric vehicles. The input voltage of the DC charging pile adopts three-phase four-wire AC380V±15%, the frequency is 50Hz, and the output is adjustable DC, which can directly charge the power battery of the electric vehicle. Since the DC charging pile is powered by a three-phase four-wire system, it can provide sufficient power, and the output voltage and current can be adjusted in a large range, which can meet the requirements of fast charging.
 

General situation of large power grid

Small charging stations can directly use the existing transformers to get 380V / 240V /110V AC power.  Medium and large charging stations require additional transformers to meet power requirements.

​General principle diagram of DC charging station（fast charging）

• DC charging is suitable for fast charging of commercial vehicles, and charging piles can be shared.
• No need for on-board chargers on the vehicle side.
• DC charging pile power from 20kw to 600kw.

General principle diagram of AC charging station

• AC charger is suitable for slower charging of passenger car
• There need an on-board charger on the vehicle side for AC rectified to DC.
• The power of AC charger is 7kw, 11kw and 22kw .

Comparison of AC charger and DC EV charger

1. The average added cost of charging facilities of AC charging piles is higher than that of DC charging piles;

2. The DC charging pile has advantages in cost, charging convenience, and vehicle weight;

60-160KW Floor-mounted DC EV Charger

Applicable scenarios

DC charging piles are suitable for urban special charging stations (buses, taxis, official vehicles, sanitation vehicles, logistics vehicles, etc.), urban public charging stations (private cars, commuter vehicles, buses), intercity expressway charging stations, etc. In the case of DC fast charging, it is especially suitable for rapid deployment in the case of limited space.

7、11、22KW AC EV Charger

Applicable scenarios:

Short-distance trips, such as charging in public places such as supermarkets, shopping malls, and parking lots...

Welcome to contact us for our ev chargers!