News

News

The difference between fast charging and slow charging of charging piles

What is the difference between fast charging and slow charging of charging piles

Fast charging and slow charging are relative concepts. Generally, fast charging is high-power DC charging, which can charge up to 80% of the battery capacity in half an hour. Slow charging refers to AC charging, and the charging process takes 6-8 hours. The charging speed of electric vehicles is closely related to the charger power, battery charging characteristics and temperature.

With the current level of battery technology, even with fast charging, it takes 30 minutes to charge to 80% of the battery capacity. After 80%, in order to protect the safety of the battery, the charging current must be reduced, and it takes a long time to charge to 100%. In addition, when the temperature is low in winter, the charging current required by the battery becomes smaller and the charging time becomes longer.

A car can have two charging ports because there are two charging modes: constant voltage and constant current. Generally, constant current and constant voltage are used, and the charging efficiency is relatively high. Fast charging is caused by different charging voltages and currents. The larger the current, the faster the charging. When the battery is about to be fully charged, switching to constant voltage can prevent the battery from being overcharged and protect the battery.

Whether it is a plug-in hybrid car or a pure electric car, the car will be equipped with an on-board charger, which can be used to charge the car directly in a place with a 220V power socket. This method is generally used for emergency charging, and the charging speed is also the slowest. We often call it "flying line charging" (that is, pulling a line from the 220V power socket of a high-rise residential building and charging it with the car), but this charging method has great safety risks, and it is not recommended to charge the vehicle in this way for new travel.

At present, the on-board plugs corresponding to the household 220V power socket have two specifications of 10A and 16A. Different models are equipped with different plugs, some with 10A plugs and some with 16A plugs. The 10A plug has the same specifications as our daily household appliances, but the pins are smaller. The 16A plug has a larger pin, which is the same size as the empty socket at home, which is relatively inconvenient to use. If your car is equipped with a 16A on-board charger, it is recommended to buy an adapter for easy use.

How to distinguish fast and slow charging of charging piles

First of all, the fast and slow charging interfaces of electric vehicles correspond to DC and AC interfaces, DC fast charging and AC slow charging. Generally, there are 5 interfaces for fast charging and 7 interfaces for slow charging. In addition, we can also see fast charging and slow charging from the charging cable, and the charging cable of fast charging is relatively thicker. Of course, some electric vehicles have only one charging mode due to various considerations such as cost and battery capacity, so there will only be one charging port.

Fast charging, fast charging speed, but complex station construction and high cost. Fast charging is usually direct current (also alternating current) that directly charges the battery in the car. In addition to the power supply from the power grid, the fast charging pile should also be equipped with a fast charger. It is more suitable for users to replenish power midway, but not every family has the conditions to install fast charging, so for convenience, the car is equipped with a slow charging function, and for cost considerations, in order to increase coverage, there are also a large number of slow charging piles.

Slow charging is a slow charging using the vehicle's own charging system. Slow charging is good for the battery and has sufficient power. Moreover, the construction of the charging station is relatively simple, only sufficient power is required. No additional high-current charging equipment is required, and the threshold is low. It is very convenient to use at home, and you can charge wherever there is power.

Slow charging takes about 8-10 hours to fully charge the battery. Fast charging has a larger current of 150-300 Amps, and can be fully charged to 80% in about half an hour. It is more suitable for mid-trip power supply. Of course, high current charging will have a little effect on battery life. In order to increase the charging speed, more and more fast charging piles are being built! Most of the charging stations built later are fast charging. Slow charging piles in some areas are no longer updated and maintained, and they are directly charged after being damaged.


Related News
X
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. By using this site, you agree to our use of cookies. Privacy Policy
Reject Accept