Spheros equips Volvo hybrid plug-in buses
It is not only the bus occupants who require a pleasant climate, but also the modern electrotechnology in the bus. The first 20 Volvo hybrid plug-in buses have now been equipped with the REVO-E
all-electric rooftop unit, as well as the new Spheros E-Cooler for systematic cooling of the lithium-ion battery on the roof. Further buses will be delivered in series starting in May.
Electromobility is closely reliant upon the performance of the battery. To ensure optimum exploitation of their capacity both during and prior to operation, they must be maintained within a narrow temperature window. This is where the Spheros E-Cooler comes in: with a maximum cooling capacity of 5 kW it ensures effective removal of the heat produced during charging and discharging. If necessary, the battery can also be protected from cold: a heating function can also be integrated via the E-Cooler.
Integral control for energy-optimised operation
A special emphasis is placed on low-energy operation. The electrically powered compressor is not actuated at low outside temperatures and the system switches automatically to passive cooling (water cooling only). Compressors and fans can also be regulated if required via PWM control. In addition, the vehicle has a CAN-bus connection.
The E-Cooler is a standalone solution that functions without additional equipment. Located in immediate proximity to the battery, it is an integral part of the overall battery concept. The individual components can be aligned according to the vehicle geometry and thus adapted to the requirements of the respective bus manufacturer.