The company is operating on the assumption that around 66% of scheduled-service buses will be electric by 2030. The new MAN Lion’s city diesel was presented in March 2018. The countdown for the release of the electric version is now approaching the end. Its most striking feature of the electric bus MAN Lion’s City E is the lack of a rear engine compartment, with the batteries installed on the roof, making room for an ideal seating area at the back. Firstly, this positioning moves the batteries away from the vehicle’s rear, which is vulnerable in the event of a crash. Secondly, it allows for more design flexibility, more pleasant lighting and up to four additional seats in the interior. Indeed, while the layout of first electric buses was derived from that of diesel buses, future electric buses will surely be built with specific layouts that will take advantage of the characteristics of electric traction.
MAN has opted for one central motor to power its electric bus (on the second driven axle), then two to power its articulated bus (on the second and third driven axles). These, according to MAN, are easier to access and more simply designed than motors in close proximity to the wheels (that is a widespread choice: the electric axle Ave130 by ZF has been adopted both by Solaris Urbino electric and Mercedes Citaro electric). In particular, the articulated bus benefits in terms of its handling. The two driven axles increase its driving stability and, in turn, its safety, as well as providing maximum energy recovery when braking.
The fully electric driveline produces 160 to 270 kW in the solobus. The power used for this comes from the modular batteries with 480 kWh capacity (Solo) or 640 kWh (articulated). In selecting these, MAN decided to take advantage of precision-engineered battery technology from the company’s existing range. These batteries’ sophisticated temperature management guarantees especially strong availability, regardless of the time of year. This way, the Lion’s City eBus can reliably ensure their 200 km range in realistic conditions and over their batteries’ full life cycles.
The batteries are plugged into a CCS and charged at the depot, which can fully charge Solobuses in under three hours and articulated buses in under four with an average charging power of 100 kW. This length of time falls accordingly when the maximum charging power of 150 kW is supplied. MAN surveyed close to 200 customers throughout Europe and received feedback from several cities. It concluded that, for the sake of routine operations later in the day, flexible and uninterrupted service (without opportunity charging) is more important than an unlimited range. Especially since battery technology is developing at a rapid pace. The Lion’s City E will remain at the cutting edge in this regard, as it will be possible to upgrade the current battery modules to the next generation. Charging outside of peak hours will also enable operators to tap into smart charge management and benefit from lower electricity rates, further adding to the electric buses’ cost effectiveness.
