Electric bicycles have been enjoying tremendous popularity for quite some time, e-scooters are also increasingly roaming the streets. In addition to the supply voltage for their drive, these vehicles require a lower voltage of 12 V for indicators and headlights, which is typically buffered by a corresponding lead acid battery. A new FRIWO DC/DC converter ensures the supply of the additional battery from a 48V traction battery.
Currently the subject of electromobility is much talked about. This is attributable to the limited fossil fuels, particularly oil, and to CO2 gases generated during combustion, which contribute to global warming and therefore to environmental pollution (for example soot particles, nitrogen oxides, etc.).
Electric cars are still a niche market. There are only a few models and manufacturers worldwide. One reason for this situation is certainly owed to the increased comfort demand - including luxury. This includes, for instance, extras like air conditioning, seat heating or heated front and rear windshields which usually can be found in conventional cars.
Unlike electric cars, however, electric bicycles have become rapidly popular. The annual sales figures continue to rise: according to the ZIV industry association, 605,000 e-bikes were sold in Germany in 2016. This means that the overall market share increased from 12.5 percent in 2015 to 15 percent in 2016. If children's bicycles and racing bikes are ignored, the share is even significantly higher. According to ZIV, a total of three million e-bikes roam Germany's cycle paths since the beginning of 2017*. All of this, of course, in a comfortable way to ensure a faster and easier mobility.
E-scooters, also known as electric mopeds or electric light-weight bikes, are an extension of this product range towards more mileage and speed. Having enjoyed increasing popularity in Asia for quite some time, these vehicles are coming on strong in our country. With the improvement of the required charging infrastructure, the numbers of eco-friendly electric scooters will also increase on our streets. Especially in big cities, the quiet two-wheelers are more frequently spotted, private owners and delivery services are switching over to this eco-friendly alternative. In addition, e-scooter rentals and sharing are emerging: Apart from Berlin, Hamburg and Munich many big cities in North Rhine-Westphalia belong to the driving forces.
E-scooters typically extract the energy required for their operation from a 13-cell rechargeable battery. 13 cells with a nominal voltage of 46.8 V still fall under the so-called safety extra low voltage, but already provide a voltage level at which the resulting currents can be controlled by a predetermined power. This cell number is currently becoming industry standard. As far as e-scooters are concerned, a 12 V level for indicators and headlights is also required. These 12 V are, as practiced today, buffered by a 12 V battery. This means that the 12 V battery needs to be supplied by the 48 V traction battery. FRIWO has therefore developed a new DC/DC converter which copes with this task and which offers a variety of advantages:
With the new DC/DC converter FRIWO has engineered an ideal component for Light Electric Vehicles (LEV) which optimally completes the existing product portfolio with battery chargers and battery packs and which drives FRIWO's integration as system supplier for tomorrow's market of electromobility.
* E-scooter startups conquer Germany's cities, https://www.wired.de/collection/tech/e-roller-startups-erobern-deutschlands-staedte
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