The University of Cooperative Education
Industrial Engineering
Medical Engineering
Electrical Engineering
Financial Management
Computer Science
Public Management
Bautzen
twinned with Jelenia Góra
www.ba-bautzen.de
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Conference and Exhibition on E-Mobility
More information:
http://verein.ba-bautzen.de
www.ba-bautzen.de
2
Student Project on E-Mobility
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Implementation of a
Practical Charging
Technique for
E-Bikes
Florian Hempel (11E-A) and Dr Daniel Raabe
BA-Bautzen
www.ba-bautzen.de
Agenda
I.
Introduction to E-Mobility
II. Bike Hire Scheme ‚Oberlausitz per Rad‘
III. Current charging technology
IV. Our concept for a practical charging technology
for E-Bikes within the rental network
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E-Car (Renault Twizy), BEV
E-Mobility
Charging tower
>
E-Mobility = the use of electric vehicles for
transportation
>
E-Mobility combined with renewable energies
could be one answer to global climate
change, increased global population & limited
resources
>
Aim of the German Federal Gov. is to put
1Mio Electric Vehicles on the road by 2020.
>
This seems to be unlikely considering current
registration figures of E-cars (2012 only
3,000; Source: KBA).
>
With respect to E-Bikes incl. Pedelecs we
have already hit the 1Mio threshold according
to the bike association ADFC (sales of EBikes 2011–200,000, Sr: Derby Cycles)
Number of E-cars on the road
Source: zsw.bw.de
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Pedelec and E-Bike
Pedelec
Pedelec (Pedal Electric Cycle)
supports the user during cycling
(max. power 250 Watts and max. velocity 25km/h
E-Bike (Electric Bike)
supports the user even without cycling (using the pedals)
(max. power 500 Watts and max. velocity 20km/h
National Development Plan E-Mobility
Main objectives of the plan:
I.
Improvement of energy storage/
battery technology (for
increased range)
II.
New vehicle technology (e.g.
more efficient drive technology)
III.
Development of an area wide
charging grid
Quelle: Nationaler Entwicklungsplan Elektromobilität
der Bundesregierung – BMBF, 2009
http://www.elektromobilitaet-verbindet.de
Various initiatives to support
this plan such as
Although the use of E-Bikes
has several advantages in terms of sustainability
and local development e.g. through toursim 
the further development of E-Bikes and its
infrastructure is not support by current
initiatives such as BAYERN-SACHSEN
ELEKTROMOBILITÄT VERBINDET
one example 
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Bike Hire Scheme ‚Oberlausitz per Rad‘
Network Facts:
>
An expanding cross-border network of 20 bike
rental points supporting bike toursim
>
Bikes can be picked at one rental point & returned
at a different rental point with no additional charge
>
Rental points are independently managed by
hotels, bike shops, tourist information points or local
park administrations
>
Complete technical service by Little John Bikes
>
Opening of a new int. bike rental station in Krásna
Lípa (Czech Republic) in April 2014
>
More int. partners wanted!
>
Unfortunetely, the scheme currently supports no EMobility and in particular no E-Bikes due to the lack
of a practical bike charging infrastructure
>
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E-Bike charging system
Pedelec
E-Bike
Essensial for an E-Bike or Pedelec
is a sufficient battery providing sufficient range.
Unfortuenetely, these batteries have to be charged!
How do we do this?
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E-Bike charging system
The battery of an E-Bike can be
charged removed from the bike
Drawbacks of the current system:
>
Charging
E-Bikes/
Pedelecs
requires the use of external
battery chargers that are either
carried by the user to the charging
st. or supplied at the charging st.
>
Batteries and battery chargers are
not standardized
>
Charging E-Bikes during long
distance rides requires also a safe
environment such as a dedicated
room because the charging system
of an E-Bike is currently not
lockable
> in a separate charging station to 230V
socket
Battery in the bike
Battery removed
charger
docking station
> or without moving the battery
from the bike
to 230V
socket
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What companies offer for bike users…
No battery charger available
at the charging point
Open access charging pillar
with 230V power sockets (CEE 7/5)
Not a safe environment
Quelle: Belectric Drive GmbH, Kitzingen
No network
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Our solution
> Charging tower for partners of the
bike scheme ‚Oberlausitz per Rad‘
> Having drawers for standardized and
none standardized charging
> Using renewable energy
> Drawers are lockable
www.ba-bautzen.de
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Thank you
Florian Hempel (11E-A) and Dr Daniel Raabe
BA-Bautzen
raabe@ba-bautzen.de
www.ba-bautzen.de
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