Electric buses are an eco-friendly alternative to diesel. With several project partners, Fraunhofer researchers have developed a concept to swiftly recharge buses while they operate routes.
System testing in Dresden has been underway since November last year.
Electric vehicles are supposed to make urban transport more environmentally friendly in the future. Using buses for short-range public transportation is a good way of helping to implement this vision: fixed routes and stops make it easier to plan and provide the requisite infrastructure. In addition, public transport sets an example to the wider public. “However, electric buses will only gain acceptance if they adapt to established operational practices and do not create a need for additional vehicles or personnel,” says Dr. Thoralf Knote from the Fraunhofer Institute for Transportation and Infrastructure Systems IVI. This poses some challenges: regular urban public transport buses travel up to 400 kilometers a day without returning to the depot. To supply the electric energy this requires, huge batteries would be needed, for which there is not enough space available in a bus. The alternative is to quickly recharge the vehicle’s battery while it is serving its route – for example, while the bus is waiting at the terminus. This requires high charging capacity.
Contact system for recharging fitted to roof of bus
Working with several partners in the EDDA Bus project, Fraunhofer scientists have developed a solution that permits fast, uncomplicated recharging. EDDA Bus is part of the Fast Charging Systems for Electric Buses in Public Transport joint research project funded by the German Federal Ministry of Education and Research (BMBF). The solution is based on four core technologies: the Dresden-based company M&P GmbH designed a charging station with very high charging capacities; HOPPECKE Advanced Battery Technology GmbH supplied special batteries designed for such high power capacities; Vossloh Kiepe GmbH was responsible for adapting the power electronics; and finally, the heart of the development work is the contact system located on the roof of the bus, which was realized by Fraunhofer IVI together with Schunk Bahn- und Industrietechnik GmbH.
For the contact head, six powerful contacts were housed in a small installation space. There are two contact poles – one positive, one negative – on each side. Fitted to the top, there is an earth contact and a control pilot, which monitors the earthing. “This means our system meets the most stringent safety requirements,” explains Knote. Schunk Bahn- und Industrietechnik GmbH developed heat-stable components for the contact system. This was necessary because, in contrast to streetcars for instance, where energy is transferred while the vehicle is moving, transferring power to a stationary vehicle generates high local temperatures that would damage conventional components.
The charging process is very straightforward: “We don’t want to burden drivers with extra tasks,” emphasizes Knote.
Read more: Fast charging electric bus does overtime
The Latest on: Electric bus
via Google News
The Latest on: Electric bus
- Cheaper fares, electric buses and buying depots agreed by leaderson August 3, 2022 at 3:08 am
Plans to bring buses in Greater Manchester back under public control are progressing as leaders agree to buy new electric buses and bus depots.
- Global Coach and Bus Growth Outlook Report 2022: India and Latin America are Candidates for Strong Growthon August 3, 2022 at 1:08 am
The "Global Coach and Bus Growth Outlook, 2022" report has been added to ResearchAndMarkets.com's offering. The COVID-19 pandemic continued to have a global impact in 2021, with transit and bus ...
- San Diego Electric School Buses to Gird Grid During Peak Timeson August 2, 2022 at 4:24 pm
A pilot project between a regional utility and the Cajon Valley Union School District is turning eight electric school buses into battery storage devices to supplement the electric grid during peak ...
- Propane school buses make more sense than electric for Tennessee school districts| Opinionon August 2, 2022 at 4:00 pm
The Clean School Bus Program affords Tennessee school districts a choice to better serve their students, parents, teachers and administrators.
- CT: NTSB joins probe of CT's 'rare' electric bus fire; only 18 verified incidents globally since 2010on August 2, 2022 at 4:34 am
The fire, which destroyed one of CTtransit's dozen electric buses, was the first of its kind for the state's fleet. The rest of the electric fleet was pulled from service since then.
- These electric school buses can help power the gridon August 2, 2022 at 12:00 am
A new pilot is using eight electric buses to store solar power and send it back to the grid when it’s under stress.
- 100% electric trucks and buses by 2050on August 1, 2022 at 1:33 pm
A coalition of 17 states, Washington, D.C., and the Canadian province of Quebec has released a roadmap to make 100 percent of truck and bus sales electric by 2050.
- ABQ Ride debuts first five electric buseson August 1, 2022 at 8:49 am
The five buses are the first electric vehicles to be utilized by ABQ Ride, and the city hopes to continue adding electric vehicles over the coming years, with the goal of utilizing them exclusively by ...
- NTSB Joins Investigation of CT Electric Bus Fireon August 1, 2022 at 8:12 am
"Working with Connecticut State Police and state officials, NTSB is investigating a fire that consumed a CTtransit battery ( July 23) in Hamden, Connecticut. The bus was in a maintenance facility at ...
- NTSB joins probe of CT’s ‘rare’ electric bus fire; only 18 verified incidents globally since 2010on August 1, 2022 at 6:00 am
It’s rare for an electric bus to burst into flames in the way a state-operated one did last month at a Hamden bus depot, but the same can’t be said for all electric vehicles, according to industry ...
via Bing News