Saturday, November 27

Specially cooled cable fully charges electric cars in five minutes

In recent years, automakers have brought ever greater range electric cars onto the market. In the meantime, this is already quite comparable with combustion engines in many models. The big difference: While a refueling stop only takes a few minutes in the best case and then the entire range is available again, things are much more complicated with electric cars. Either significantly more time is required here or the battery is not fully charged. Physical limits are responsible for this. So far, the charging cables have been a limiting factor. Because these can overheat if too much electricity is transmitted too quickly. Researchers at Purdue University in the United States have therefore now developed a special cooling technology together with the car manufacturer Ford. A coolant is used, which evaporates during the charging process and thus dissipates the heat.

Image: Purdue University image / Issam Mudawar

The charging cables can even carry more power than necessary

During tests in the laboratory, the researchers were able to safely conduct electricity with a strength of 2,400 amperes through the cooled cable. To put it into perspective: around 1,400 amps are required to fully charge the battery of an electric car. The new technology also has a second advantage: although more current can be conducted through the cable, the diameter is reduced. This in turn can simplify everyday use. This also reduces material costs. However, there is still one limitation: So far, the charging cable with the evaporating coolant has only been tested in the laboratory. The next step now is to develop a practical design that will also enable use on classic charging stations. From a technical point of view, however, this should not be an insurmountable problem. The new charging cable could then do its part to make electric cars even more attractive.

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The battery and charging station must also be powerful enough

Especially since the researchers have announced that they will be able to further develop the technology. However, it is only one piece of the puzzle in a much more complex process. Because in theory the cable can carry large amounts of electricity in a short time. The prerequisite for this is of course that the power source and the receiving battery are also capable of doing this. So far, however, only a small part of the existing charging stations have a fast charging function. On the battery side, on the other hand, it is not least a question of price, how quickly it can be charged. It is therefore quite conceivable that different versions of electric cars will become established in the future. Rather inexpensive models with longer charging times also on the go, as well as premium class vehicles, where the downtimes are then comparable to today’s refueling processes.

Via: Purdue University

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Reference-www.trendsderzukunft.de

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