Module size investigation on fast chargers for BEV
Övrigt - Teknisk Rapport, 2018

Fast chargers as defined by CharIN are DC-chargers up to a power level of 50 kW and are usually
built to charge one vehicle. New High Speed Chargers can have a power up to 150 kW and Ultra
High Speed Chargers up to 350 kW. They are to be used by some of the biggest battery vehicles and
the charger could be made out of several modules that can be combined and charge several vehicles.
The report investigates how module size to a 150 kW charger influences the charge process of a
vehicle type that will be available fairly soon. The best is to use many small modules if the
efficiency can be high enough. A module size of 17 kW is a rather good alternative and nine such
modules could provide 150 kW. The fixed cost of signal electronics has become insignificant and
the size is so low that it is possible to combine several modules to the needed power. If a lower
number of bigger modules are to be used the knowledge of the target vehicle is important, otherwise
for instance four modules can behave worse than three modules. Just one big module is not
recommended as it is inflexible in terms of charging different sized vehicles and the utilisation of
the charger is low. If the charger are divided in two modules the charger will be much more flexible
and with the ability to charge two vehicles at the same time a better utilisation of the charger is



Mikael Alatalo

Elmaskiner och kraftelektronik


Hållbar utveckling




Transportteknik och logistik


Annan elektroteknik och elektronik

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