Battery technology

Battery technology

Both solo bus and articulated bus feature the same drive system with identical output of 125 kW. Of modular structure like the drive system, the array of lithium-ion batteries is also of modular design. Two, four or six battery modules are mounted on the roof of a solo bus. As standard these batteries are supplemented by four further battery modules in the rear of the vehicle. Each of these modules consists of 15 cell modules and a control unit. Each individual cell module consists of twelve battery cells. The total capacity of the batteries is 24 kWh.

Whether your charging requirements are depot based or high-performance: the modern nickel-manganese-cobalt (NMC) cells used by Mercedes-Benz are equally suitable for both. Six, eight, ten or twelve battery clusters can currently be integrated, distributed over the roof and rear of the eCitaro. With maximum battery capacity and a total capacity of 292 kWh (NMC Level 1), the rigid bus achieves a range of up to 200 kilometres while the articulated bus achieves a range of up to 180 kilometres* with a total capacity of 396 kWh (NMC Level 2).

With fewer battery clusters, passenger capacity increases – if a longer range is desired, it can be achieved through 300-kW intermediate charging via the pantograph if necessary. In future, it will also be possible to increase the range by charging via charging rails. With the next generation of NMC batteries (Level 2), the range will increase again. An optional battery update of the eCitaro is also possible.

NMC battery – The advantages:

  • Long, practical ranges.
  • Modular capacity.
  • High charging capacity.
  • High-performance charging possible via pantograph and charging rail.

Another futureoriented battery technology is already in sight at Mercedes-Benz: solid-state batteries, or more precisely: lithium metal polymer solid-state batteries. They are characterised by a particularly long service life and a high energy density. Up to seven clusters can be installed, allowing for a maximum battery capacity of approximately 441 kWh. Thus, for example, the eCitaro G rigid bus with a maximum load of solid-state batteries achieves a corresponding range of up to 320 kilometres while the eCitaro G articulated bus achieves up to 220 kilometres.* City buses with solid-state batteries cover other service profiles in which the technological benefits of the system are shown to their best advantage.

Solid-state battery – The advantages:

  • High energy density for longer ranges.
  • Long service life.
  • No battery cooling required.
  • Forward-looking technology.

* Favourable conditions: Average requirements in terms of speed, topography and loading, simple climatic conditions.

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