DC charging. Photo: https://www.audi-mediacenter.com/
As we all know, There are a lot of variables that affect each vehicle’s charging speed. In this passage, the nuts and bolts of what affects the EV charging speeds will be involved.
The battery size is the most important variable. The bigger the battery is, the longer it will take to charge. The state of charge is measured in kilo-hours(kwh), which is similar to a liter or a gallon. The kwh is a composite unit of energy equal to one kilowatt sustained for an hour. In fact, the vast majority of our electric car batteries can hold somewhere between 25 and 100 kwh when fully charged.
Charging capacity of the vehicle
The key parameter when choosing an electric car is the capacity of the on-board charger. The charging speed depends on the output of the on-board charger, which determines how fast the car can receive the alternating current from the source. The power output that a car receives differs from car to car and even varies between different models. The charging capacity is shown for both AC charging and DC charging. For example, if we charge two vehicles with the same high-power DC charging station and one can receive 50kw of DC and the other 100kw, the latter will charge faster than the former.
Charging output of the charging station
As a basic factor in determining the charging speed, the charging output of the charging station plays an important role in how long it will take to charge your electric car. The higher the output is, the faster the charging will.
AC charging and DC charging
When charged with an alternating current, the car’s on-board charger(also called on-board system) is used and it converts the outlet current into the battery current. As a result, it receives alternating current and converts it into direct current, which is sent to the car battery.
DC charging(also called fast charging) is done using a DC charging station, which can change alternating current to direct current, it then bypasses the on-board charger on the electric car and sends the direct current through the battery management system to the battery.
With AC charging, the electric car charger at the same speed from 0 to 100 percent full. However, with DC charging, the car’s battery receives a quicker flow of power at the first and then accepts less power as it starts to fill up. That’s because the vehicle needs to protect its battery from a skyrocketing of power. As a result, with a DC or level 3 charger, the time used to charge an electric car from 0 to 80 percent full is almost the same as it takes to charge the last 20 percent.
The weather is another factor that exerts a great influence on the charging time. At colder temperatures, the battery’s ability to provide sufficient power to start and run a vehicle is diminished. At extremely hot temperatures, the battery’s ability can also be under the normal level. As a result, it will take longer to charge a vehicle at colder and extremely hot temperatures.
Post time: Jul-11-2022