Daimler Buses’ and Akasol’s long-term cooperation for the development and mass-production of battery systems for the electric bus eCitaro is going from strength to strength. In autumn, serial production of the first-generation battery system Akasystem OEM will begin in Langen (Hesse, Germany) as planned. Meanwhile, Akasol is starting to develop second-generation lithium-ion battery systems in close cooperation with Daimler Buses. These will offer about 35 percent more energy and contribute to an improved range in 2020.
Instead of currently 25 kWh storage capacity per battery pack, the second generation will be able to store 33 kWh per battery pack. This means an increase of 35 percent from 243 to 330 kWh per vehicle while maintaining the same constructed space, weight and upwards compatibility. This is made possible thanks to the unique, flexible system architecture that Akasol offers its clients. According to Daimler Buses this technology leap, in conjunction with other factors, contributes to an increase of the vehicle’s range to approximately 200 km (SORT2 cycles, medium traffic) and up to 250 km when operating under ideal circumstances.
The lithium-ion battery systems of both generations are able to charge rapidly (at up to 300 kW) and supply energy to additional units such as air conditioning and electrical systems. The key factor for providing robustness and durability is Akasol’s efficient water-cooling which guarantees stable tempering at 25 ºC and allows battery-run buses to operate in all climates. The high-performance battery systems are partly mounted on the roof, partly in the rear.
Akasol has developed and distributed a variety of battery systems for electric and hybrid electric buses for many years. In addition to EvoBus, one of Akasol’s clients of series produced battery systems for buses, buses using Akasol’s innovative battery technology are in daily operation in London, Berlin, Cologne and Braunschweig amongst others.