Fast charging and slow charging are relative concepts. Generally fast charging is high power DC charging, half an hour can be charged to 80% of the battery capacity. Slow charging refers to AC charging, and the charging process takes 6-8 hours. Electric vehicle charging speed 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%, the charging current must be reduced in order to protect the safety of the battery, and it takes a long time to charge to 100%. In addition, when the temperature is lower 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. Constant current and constant voltage are generally used for relatively high charging efficiency. Fast charging is caused by different charging voltages and currents, the higher the current, the faster the charging. When the battery is about to be fully charged, switching to constant voltage prevents overcharging and protects the battery.
Whether it’s a plug-in hybrid or a pure electric vehicle, the car is equipped with an on-board charger, which allows you to charge the car directly at a place with a 220V power outlet. This method is generally used for emergency charging, and the charging speed is also the slowest. We often say “flying wire charging” (that is, from the 220V power outlet in high-rise homes to pull a line, with the car charging), but this charging method is a big security risk, the new travel is not recommended to use this way to charge the vehicle.
Currently home 220V power socket corresponding to the car plug 10A and 16A two specifications, different models equipped with different plugs, some with 10A plug, some with 16A plug. 10A plug and our daily household appliances with the same specifications, the pin is smaller. 16A plug pin is bigger, and the size of the home of the empty socket, the use of a relatively inconvenient. If your car is equipped with a 16A car charger, it is recommended to purchase an adapter for easy use.
How to recognize 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, from the charging cable we can also see the fast charging and slow charging, the charging cable of fast charging is relatively thicker. Of course, some electric cars 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 is fast, but building stations is complicated and costly. Fast charging is usually DC (also AC) power that directly charges the batteries in the car. In addition to power from the grid, fast charging posts should be equipped with fast chargers. It is more suitable for users to replenish the power in the middle of the day, but not every family is in a position to install fast charging, so the vehicle is equipped with slow charging for convenience, and there are a large number of slow charging piles for cost considerations and to improve coverage.
Slow charging is slow charging using the vehicle’s own charging system. Slow charging is good for the battery, with plenty of power. And charging stations are relatively simple to build, requiring only adequate power. No additional high-current charging equipment is needed, and the threshold is low. It’s easy to use at home, and you can charge anywhere there is power.
Slow charging takes about 8-10 hours to fully charge the battery, fast charging current is relatively high, reaching 150-300 Amps, and it can be 80% full in about half an hour. It is more suitable for midway power supply. Of course, high current charging will have a slight impact on battery life. In order to improve the charging speed, fast filling piles are becoming more and more common! Later construction of charging stations are mostly fast charging, and in some areas, the slow charging piles are no longer updated and maintained, and are charged directly after damage.
Post time: Jun-25-2024
