Charging technology – charging time per kilometre is crucial charging speed, charging power, charging time – when it comes to Recharging an electric car, is to face the buyers with completely different figures. But what you should look for? Dave Schneider0 KommentareBei electric cars, it is not only the maximum charging power, but also on the charging time and the range of the cars. Photo: PD

In connection with electric cars is with terms such as direct current and alternating current, charging time and charging performance, battery capacity and the Like, and more face. But for the buyer it is crucial: How quickly can I charge how much percent of the battery, and for how many miles will this be enough then? Because manufacturers often call only a maximum charging power, i.e. how much kW in the best case, can be loaded, is not yet clear how long the battery needed to charge an electric car can be loaded permanently with full power.

“The customer should not be interested in only the maximum value of the charging power, but rather, how these over the course of a charging operation, and optionally throttled runs”, has to be confirmed Silvia Gramlich, who works at Audi in the development of load duration and efficiency. Because the batteries during the charging process heat is strong, they must be appropriately cooled – in case of excessive heating of the battery, the charging power must be reduced. This circumstance hand, the manufacturers have quite different. How fast a battery can be charged, not only the load performance, but also authoritative by the thermal management. “The question that should be of interest to the customer, is: How many kilowatt hours I can reload in what period of time?”

yet another decisive factor: the consumption of it is Added but. Only when a customer provides the charging power, the charging time, known range, and the consumption of an electric car, and these factors in Relation, he can judge how often and how long his car at a charging station will be available. If car A can load faster, but more consumed and, thus, more often on the cable must hang, you will be well served with car B might be better because it loads less quickly, but with a charge to continue driving. Car C might have a smaller battery, it can charge significantly faster than car D, and is therefore more often, but shorter on the load column.

a unified measure that would make all of these factors in the different cars comparable to that are missing. The battery capacity is usually called the gross, how much the car uses, it is true, is, at best, in the small print. Some manufacturers call the time required for a charge of 10 to 80 percent of the battery in the ideal case, of course. Some speak of the number of kilometers that you fill in how much minutes can. Other set the maximum charging power in the foreground, not to mention how much the performance when Loading, in time, wears off, or how often and how long you download because actually need to. As long as there is no uniform Declaration, it remains the responsibility of the customer to check these values and to question and, ultimately, a “milk büechli account” to set up.

batteries heat up during charging, depending on the thermal management, the load power is derated accordingly. Photo: PD comment please Login to comment