On Wednesday 1 March 2017, during the Energy Storage Summit conference in London, Michael Willemot presented the flywheel technology, particularly Levisys flywheel. He also presented the Levelized Cost of Storage, the most accurate way to compare cost of technologies, and why hybrid storage systems are optimal solutions. This presentation was part of a panel discussion on energy storage technology comparison and applications.

1. 1
Your partner
in the transition
to a renewable future
An Innovative Flywheel Manufacturer
Using Passive Magnetic Levitation
Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION

2. 2Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION
Flywheels
Potter in front of his tower
Greek Antiquity (Historical Museum of Berlin)
Power
Electronics
Electric
Motor
Electric
Generator
Flywheel
Power
Electronics
Energy Energy
Electric ElectricMechanical
Ek = K ⋅ mass ⋅ radius2 ⋅ RPM2

3. 3Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION
Flywheels
1. Containment
2. Flywheel
3. Motor-Generator
4. Bearings
5. Transformer
6. Vacuum pump
7. Input Current
8. Output Current
Vacuum Flywheel (without magnetic levitation)
Magnetic Levitation Flywheel

4. 4
Levisys Flywheel
Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION
 Exceptional efficiency: 97% over the entire
lifecycle
• Passive magnetic levitation technology
• High energy density rotor developed jointly with Airbus
Industrie
• High performance generator motor
• Highly integrated architecture
• No cooling system
 Very long life time and reliability:
> 500,000 cycles
13.5 kWh / 40 kW
0 10 20 30
0
50
Time (mn)
Power(kW)
Power supplied by
a LEVISYS flywheel

5. 5
Cross-technology
comparison tool
Accurate estimate
of real costs
LCOS
Scenario-based
Levelized
Cost Model
What is the most accurate way to
compare cost of technologies?
 LEVISYS can help you analyze the situation and make the right decision!!
No generalization
Project = specific aspects
Parameters:
Context-based
+
Technology-based
Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION

6. Optimal solutions
6
Energy storage technologies are complementary instead of competitive
Hybrid storage systems combine the strengths of both technologies
 flywheel-battery = power-intensive short-duration + energy-intensive
long-duration
 Additional benefits – e.g. extend batteries lifetime
Increases value proposition
 Short & medium discharge applications
(few secs to 1 day storage)
Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION
Range Covered by Hybrid Storage System

7. A Strategic Partnership
7
October 2016: historic cooperation agreement between Levisys and BYD
 Scalable system with modules
 Upstream integrated storage system
Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION

8. 8
Your partner
in the transition
to a renewable future
An Innovative Flywheel Manufacturer
Using Passive Magnetic Levitation
Energy Storage SUMMIT 2017 - TECHNOLOGY COMPARISON & APPLICATION