JockoT |
07-26-2021 09:00 AM |
According to this piece from Mercedes Benz it has 25% more energy density but slower recharging.
"New: solid-state batteries – a pioneering achievement in automotive construction
The new eCitaro G is the first city bus in its category anywhere in the world to be equipped with solid-state batteries. These lithium-polymer batteries are also part of the lithium-ion group of batteries. Because they contain electrolyte in its solid form as a polymer instead of the usual liquid, they are known as solid-state batteries. The battery anode is made of graphite with pure lithium, and the cathode of lithium iron phosphate.
Solid-state batteries are characterised by their extremely high energy density, which is around 25 percent greater than in the coming generation of traditional lithium-ion batteries with liquid electrolyte. Each battery assembly in the eCitaro and eCitaro G has an energy content of 63 kWh. With seven assemblies on board this amounts to an impressive total of 441 kWh. This gives the eCitaro G a range of up to 220 kilometres in favourable conditions with average demands on speed, topography and load along with straightforward climatic conditions. In the winter with the heating in operation, the eCitaro G covers an impressive 170 kilometres. The characteristics of solid-state batteries differ significantly from NMC batteries: overall they have a greater volume and they cannot be swapped for NMC batteries.
As solid-state batteries operate at a temperature of around 80 degrees Celsius, there is no need for a complex cooling system as is the case with NMC batteries. Solid-state batteries reach their operating temperature solely through energy metabolism during use. During extended breaks, heating elements maintain the batteries at an ideal temperature. This occurs automatically in the eCitaro G with no need for the driver to take action.
In contrast to NMC batteries, the suitability of solid-state batteries for rapid charging is very limited as they have a maximum charging output of around 80 kW. Their suitability for intermediate charging is therefore severely restricted, and they are only supplied by Mercedes-Benz in combination with charging via connector. The solid-state batteries have an impressively long service life of up to ten years. Furthermore, this battery technology does not require the use of cobalt."
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