Public network of fast chargers as the starting point of the e-mobility revolution

Photo: Siemens

What is older “chicken or egg”? We do not have the right answer to this question.

However, what is the condition for the development of eMobility, a publicly available network of fast chargers or an affordable price of electric cars and an increase in the number of their users (customers)? The answer to this second question is obvious – the development of the network or infrastructure of fast chargers is one of the main conditions (in addition to reducing the still high prices of electric cars) faster development of eMobility and mass transition to this type of transport.

The fear of an empty electric car battery while driving, and far from any charging options, is largely present (I personally witnessed the same during a test drive of an electric car when, due to works, the highway lane on the side where the gas station was closed station with the only charger on the route I drove) while your gaze is focused on the battery status indicator and the number of kilometers to the next charging point.

It is clear that charging the battery of an electric car at home and at work is not only the primary charging option for today, but also for the near future.

However, if we want to accelerate the development of eMobility and make electric cars a common means of transport, we will need to establish comprehensive public fast charging networks. According to a recent study by the German BMVI (Federal Ministry of Transport and Digital Infrastructure), the possibility of public charging of an electric car will be one of the three most important pillars for a successful eMobility environment in 2030.

According to the study, about 41 percent of the total amount of electricity needed to charge electric cars in Germany would be used on private chargers, but approximately 32 percent of publicly available chargers will cover almost the same amount of energy. The remaining 27 percent will be used for charging electric cars at workplaces and in company parking lots.

However, a couple of items should be singled out here, firstly, there are users of electric cars who do not have the option of charging the battery at home or at work, secondly, there are users who travel a large number of kilometers a day and thirdly, with charging power up to 300 kW and voltage up to 1000 V.

Photo: Siemens

Even if the charging capacity of most electric cars is limited today, they will be able to accept more charging power in the future. In this context, public networks – fast charging infrastructure are becoming increasingly important.

And what will that infrastructure look like? In addition to individual quick charging options, e.g. in city car parks or supermarkets, there is a trend of public filling stations “hubs” for fast filling – a kind of electric version of the gas station. Ideally, these filling stations are located in city centers, infrastructural intersections or along highways where e.g. ten or more e-cars can charge quickly at the same time, along with options for drivers to be busy with something while waiting 15 minutes to recharge their pet’s battery, such as cafes or shops.

To meet these market demands, Siemens last year launched its new fast charger called SICHARGE D with a maximum power of 300kW. Modernly designed and robust, it is suitable for highways and city fast charging stations, city car parks as well as shopping malls, airports or railway stations and provides high charging efficiency, scalable charging power and dynamic energy sharing when charging multiple electric cars simultaneously .

Photo: Siemens

With a constant charging efficiency of over 95.5 percent and a peak efficiency of 96 percent, the new SICHARGE D charger ensures that almost all of the electricity generated is delivered to the car being charged. This means lower operating costs for customers. Additionally, the charger is designed to meet the future technological development of electric cars and their batteries.

The charging capacities of most of today’s electric cars are limited but the new charger will be able to accept higher charging power in the future as well as higher charging voltage ranges. SICHARGE D has a scalable charging power of up to 300 kW. Since the base power of the charger is 140 kW, it can be upgraded through “plug-and-play” modules up to a maximum power of 300 kW (PowerUp option).

The charger supports voltages between 150 and 1000 V and currents up to 1000 A on all DC sockets. This allows full loads for future 800 V battery charging electric cars, as well as for most of today’s electric cars that have lower charging voltage values. The number of electric cars is growing slowly, so today’s investments in infrastructure are challenging.

Prepared by: Dejan Milovanović

You can read the full text in the Magazine of the Energy Portal ELECTROMOBILITY.

Source: Energetski portal Srbije by

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