| dc.description.abstract | Transportation is a basic requirement of humans. Currently, fossil fuels are the main
source used in automobiles, and the trend is moving towards electric vehicles, which
is more environmentally friendly. Battery is one of the main components in an
electric vehicle. This paper aims to introduce an intelligent battery control system
which integrates a dual battery mechanism and four riding modes. Two lithium-ion
battery packs with 48V and 16AH each are used. Full electric, paddle assist, neutral
and continuous charging are the four driving modes. The paddle assist mode is
implemented with new control mechanism, and continuous charging is a new
concept to E-bicycles. An alternator is used as an energy harvesting mechanism. The
state of charge of each battery pack is automatically detected and the pack with
lower state of charge is assigned to store the energy harvested from regenerative
mechanism. The battery pack with higher state of charge is allotted to drive the
bicycle. The system will automatically interchange the role of each pack when the
driving pack reaches to its acceptable minimum state of charge. The proposed
system will allow both battery packs to charge or discharge within its full nominal
range which is not linear. Thus, it allows an increase in per charge travelling
distance. The inter connection between subpacks are controls through a relay panel
based on voltage readings. Finally, the bicycle was subjected to road trials under
three riders with different weights. The proposed system helps to cover 41.6km
under electric mode and covers 49.4km in paddle assist mode. Bicycle needs to
cover 61km in continuous charging mode to fully charge the battery. | en_US |
