Stadtwerke Münster Introduces Electric Bus Fleet Capable Of 500 kW Charging

MAY 26 2015 BY MARK KANE 12

VDL Citeas Electric for Stadtwerke Münster

VDL Citeas Electric for Stadtwerke Münster

Stadtwerke Münster in Münster, Germany has a new fleet of five all-electric buses from VDL bought through two separate projects.

Environmental topics seem\ to be very important to Stadtwerke Münster, as earlier the company installed a solar system on the depot.

As always, it’ll be interesting to see how the buses perform for the full shift or two in terms of range.

We don’t know the range, but there is no need for long range when buses can be fast charged from 500 kW chargers at the two end points of the line. VDL implemented a unique charging system with a robotic arm that automatically connects to the bus charging inlet.

“The VDL Citeas Electric delivered in Münster in connection with the SEB and ZeEUS projects feature an IFAS rapid charging system on the side of the roof of the bus. IFAS (Institute for Fluid Power Drives and Controls) is part of the RWTH Aachen University of Technology, as is the ISEA (Institute for Power Electronics and Electrical Drives) which coordinated both Münster projects. A robotic arm that emerges from the roof of a bus shelter automatically makes contact with the charging system of the bus. With this system up to 500 kW of power can be charged within 4-6 minutes. The firm Pintsch Bamag developed the electronics for the power system. The Citea for the SEB project is fitted with a Hoppecke battery. The Citeas Electric taking part in the ZeEUS project are each fitted with a Microvast battery. All 5 of the electric buses will be put in service on line 14, which according to the plans will make this line fully electric. The rapid charging stations are located at the two end points of this line. An additional rapid charging station is present at the bus depot.”

VDL Citeas Electric for Stadtwerke Münster

VDL Citeas Electric for Stadtwerke Münster

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12 Comments on "Stadtwerke Münster Introduces Electric Bus Fleet Capable Of 500 kW Charging"

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500kw in 4-6 mins… What does that even mean… Isn’t it more like 500kwh in 4-6 mins? Or it can peak at 500kw after 4-6 mins being plugged?

The charging power is 500kW, which means it takes about 5-10 minutes to charge the 86kWh battery up enough to cover the bus route. So the turn-around time at the terminus is just a few minutes.

According to a German article they intentionally chose relatively small batteries (for a bus). The 86kWh are dimensioned for up to 3 times the one-way route of 12km on the pilot line, meaning the range is about 36km total.

According to the German website the Lithium batteries have a capacity of only 86 kWh. The route “14” is about 12 km long and the bus is able to “skip” two charges before it has to charge. Does someone feel like doing the Math now ?

There’s a place in Germany called Munster? Huh… Forgetting that, woah, 500kW?! I always thought something like that was overkill, or at least through a charging cable.

So… a 86 kWh battery can be charged at 6C in 10 minutes. If Tesla superchargers where that fast, who would need bigger batteries? Besides the countries with no speed limit on highways – so Germany basically.

These busses would typically have Lithium-Titanium cells. They’re dreadful regarding size, density, old, almost everything else, but they’re cheap and charge very well.

Mitsubishi sold this kind of cell in Japan in their MiEV fleet. Instead of fitting 16kWh, it could only fit 12kWh, but they rapid charged in 10 minutes!

they are not cheap

LTO, that’s right .but LTO could be the most expensive battery. Mitsubishi uses Toshiba’s LTO. To developed a commercialized LTO is a challenge, gassing was always a problem.

interesting to see that the batteries accept such power, even for only 5min (it’s enough at 500kw).
Anyone has clues regarding the technology ? Li-ion ? primatic ?

more interesting would be the impact on the durability of the battpack

Li-Ti as said above.

There are actually two types of batteries being tested: The ZEUS busses use Lithium Titanate as you said, but the SEB model uses a Lithium Ion Battery:

LTO based material as anode, lifespan could be the longest among all types of lithium battery. The new London double deckers use the same battery for series hybrid. fast charge is one of the advantages, high cycle life is another.