This document discusses power management strategies for hybrid vehicles using super capacitors and batteries. It evaluates using multi-boost and full-bridge converter topologies to define the best approach. A hybrid vehicle uses electric motors and renewable/fossil fuel power sources. Super capacitors can charge/discharge continuously without degrading like batteries. The paper aims to study managing energy from two super capacitor packs of 108 cells each at 270V maximum using the converter topologies.

2. Super capacitors and Battery power
management for Hybrid Vehicle
Applications Using multi boost and full
bridge Converters
Under the guidance of
Miss .M.Padma
(Assistant Professor)
Batch no-EE5
1. M.Krishnaveni (11B71A0206)
2. A.Pradeep (11B71A0244)
3. E.Soumya (11B71A0249)
4. P.Srinivas (11B71A0246)

3. ABSTRACT
 In the last few years , the pollution problems & increase of the cost of fossil energy
(oil, gas) have became planetary problems.
 The Hybrid electric vehicle (HEV) has become one of the most promising vehicles in
the automobile industry due to its energy saving ability and low emission of harmful
pollutants.
 It consists of high power density batteries (lead acid)with a rated voltage of 540v
,two motors each one coupled with one alternator.
 The main objective of this paper is to study the management of the energy provides
by two super capacitor packs. Each super capacitors module is made of 108 cells with a
maximumvoltage of 270V.
 The multi boost and multi full bridge converter topologies are tested to
define the best topology for the embarked power management.
 This method achieve good power management strategy by using the multi boost
and multi fu bridge converter topologies.

4. Hybrid vehicle:
An hybrid vehicle is also called as an electric drive
vehicle.
Uses one or more electric motors for propulsion.
Generally the power generates through fossil fuels and
renewable sources.
The advantage of hybrid vehicle is regenerative
breaking.

5. SUPER CAPACITORS:
super capacitors also called ultra
capacitors and electric double
layer capacitor.
Super capacitors are based on a
carbon (nano tube) technology .
the most important advantage of
super capacitors over the
batteries is ability to charge and
discharge continuously without
Figure-1 degrading.

6. Block Diagram :
First solution

7. Multi Full Bridge Converter:
 the conversion of AC
input to the DC output
is called as bridge
rectifier.
 the conversion of DC
input to AC output is
called as inverter.
Schematic diagram of full
Bridge Converter

8. Second solution

9. Multi Boost Converter :
Circuit Diagram of Boost Converter
A process that changes one DC
voltages to a different DC
voltage is called DC to DC
conversion.
A boost converter is a DC to
DC converter with an output
voltage greater than the source
voltage.

10. Block diagram:

11. Advantages and limitations of super capacitors Power Flow:
Advantages:
Limitations:
 Charges in seconds.
 Virtually unlimited cycle life.
 Service life of vehicle is high.
 High cost per watt.
 Low cell voltage.
 High self-discharge.

12. Applications :
Telecommunication
power quality
reliability requirements for uninterruptable
power supply (UPS) installations.