1. Three major issues facing the world in the 21st century are increased energy consumption from fossil fuels, rising CO2 emissions and their impact on global warming, and deteriorating air quality from growing vehicle usage. 2. Toyota has continuously improved its hybrid technology over multiple Prius models, reducing size and weight of components while improving performance. This includes smaller, lighter battery packs with higher power density. 3. The Toyota Hybrid Synergy Drive system was further enhanced in later Prius models with more powerful electric motors and generators, higher voltage electrical systems, and improved battery charging capacity. These advancements have increased the electric drive contribution for better efficiency and performance.

2. Three Major Issues
Accelerated
Global development of 1. Energy
consumption of
industry & technology
fossil fuels
in the 21st century
2. CO2
(global warming measures)
Population growth
(in USA, Asia, etc.)
Growing number 3. Air quality
of motor vehicles

7. Prius (THS) 1997~2003
Features of System
1 Two electric motors
2 Ni-MH battery
3 Power split device
Power Control Unit
Generator Inverter
Battery
Power split device
Motor
Engine
Reduction Gear Mechanical
power path
Electrical
Transmission for HV power path

8. Evolution of Hybrid Units
•Continuous improvements (KAIZEN)
•The challenge to achieve higher performance
• Smaller, lighter units with improved output
Inverter
Main hybrid
system units
Generator Traction motor
Battery

9. Prius (THSII) 2003~
Features of System
1 Two electric motors
2 Ni-MH battery
3 Power split device
Power Control Unit
Generator Inverter
Battery
Power split device
Motor
High-voltage boost
Engine circuit
Reduction Gear Mechanical
power path
Electrical
Transmission for HV power path

10. Basic components
Toyota Hybrid Synergy Drive®
HV battery Pack improvements:
 - 26% Modules (38  28 modules)
 - 30% weight (56 kg  39 kg)
 - 15 % volume (- 6 l)
 - 23% static current drop
 more efficient Added connection portion
between each cell
Module
(6 Cells)
Cell
(1,2 V)
38  28 modules 273,6 V  201,6 V

11. Battery
1600
1400
Lighter ‘03 Prius
(Prismatic resin case)
Output density (W/kg)
1200 35%up
1000
800 ‘00 Prius
Prismatic resin case
600
‘97 Prius
400 (Cylindrical)
200 Smaller
0
0 500 1000 1500 2000 2500 3000 3500
Output density (W/L)

12. Toyota Hybrid Synergy Drive®
Improvements Toyota Hybrid Synergy Drive® vs. THS:
+ 8% petrol power: 53 kW  57 kW
+ 50% electric power: 33 kW  50 kW
+ 14 % electric torque: 350 Nm  400 Nm over a 3 x wider range
Substantial increase in contribution of electric motor
Higher voltage to electric motor/generator: 273,6 V  500 V
– superior power
– minimised electrical losses
Enhanced charging capacity of generator: more power and speed
– 33,8 kW  37,8 kW
– 6,500  10,000 rpm
Newly developed battery pack
– more compact and lighter (-30%)
– superior output density
– improved charge and discharge capacity
Aluminium High voltage wire harness (weight reduction)

13. HV Market: Cumulative sales (worldwide)
1500
1 million
Cumulative number of hybrid sales
All HVs including other
company’s HVs (Total)
1000
TOYOTA / LEXUS
(Thousand)
HVs (Total)
PRIUS(Total)
500
PRIUS (US, Europe, …)
PRIUS (Japan)
0
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007
(Year

14. Irish Market Experience
• Hybrid sales exceed 2,500 at end of 2008
• Mainly private buyers
• Toyota Ireland role in promoting Hybrid
• No.1 in customer satisfaction J.D. Power
• Resale value is very strong
• Appeal of Hybrid reaching a wider
customer base

16. 300
Source: VCA data
Low CO2 emission
European C segment vehicles
Gasoline
Petrol
250
TtW CO2(g/km)
200 Diesel
LPG
150
CNG
100 Prius hybrid
50
EV
Plug-in hybrid
0 0.05 0.10 0.15 0.20 0.25 0.30
Clean TtW NOx(g/km)
Plug-in technology can further enhance the environmental
performance of hybrids both in CO2 & pollutant emissions

20. FT-EV Concept

21. Plug-in Hybrid

22. Plug-in Hybrid Vehicle
Motor Engine Motor
Mainly EV in city Mainly HV in long distance and
driving high speed driving
Recharging circuit
Engine
Battery
Motor Household
120 / 240 VAC single phase
electrical
Recharged mainly at night energy
Plug-in hybrids : A new style of electricity utilization