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Lithium-Ion Capacitor - Advanced Technology

for Rechargeable Energy Storage Systems

N. Omar1, J. Ronsmans2, Yousef Firozu1, Mohamed Abdel Monem1, A. Samba, H. Gualous3, O.

Hegazy1, J. Smekens, Th. Coosemans1, P. Van den Bossche1, J. Van Mierlo1

1Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium,2JSR Micro N.V., Technologielaan 8, Leuven, 3001, Belgium3Université de Caen Basse Normandie, Cherbourg-Octeville, France

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Outline

• Introduction

• Lithium-ion capacitors

• Methodology

• Performances

• Model

• results

• Summary and conclusions

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Introduction

• Traction� Energy recovery/saving

� Fast charging

� Start-stop

� Peak power absorption

• Renewable Energy & Grid Quality� Stabilization of electric power

� Peak power absorption

� Power quality improvement

� Wind power generation

� Photovoltaics

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Introduction

• Energy regeneration� Forklift

� Cranes

� Construction machinery

• Back-up power & peak assist� UPS

� Telecommunication power systems

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RESS

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Lithium-ion capacitors

LIC’s capacitance is twice

compared to EDLC

JM Energy

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Methodology

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Energy evolution

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Power evolution

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

0 10 20 30 40 50 60 70 80 90 100 110

Po

we

r d

en

sity

(W

/kg

)

State of charge (%)

60°C

40°C

25°C

10°C

0°C

-10°C

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Discharge capacity

performances

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Electrochemical impedance

spectroscopy

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Model for LiCap

C (T,SoC,LC)

I

Ro,dis(T,I,LC)

VL

+

-

Rp,d(T,I,LC)

Ip,d

Rp(T,LC)

Ro,ch(T,I,LC)

Rp,c(T,I,LC)

Ip,c

Cp,c(T,I,LC) Cp,d(T,I,LC)

Voltage

Current

Temperature

Temperature

SoC

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New estimation tool

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Simulation results

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Simulation results

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Thermal characteristics

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Summary and conclusions

�Lithium-ion capacitor is an interesting technology

�Pre-doping of lithium is essential for increase of

energy

�Extended analysis

�High power capabilities

�Energy density: 14 Wh/kg

�Long cycle

�New model

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Future work

• Optimization of the LiCap system based on the

developed model (interdisciplinary)

• Development op dedicated control strategies

• Assessment of performances

• Sizing of the LiCap system

• Various applications

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Contact

Dr. Eng. Noshin Omar

Vrije Universiteit Brussel

Faculty of Engineering

ETEC - Department of Electrical Engineering and Energy Technology

MOBI – Mobility, Logistics and Automotive Technology Research Centre

ZE102 / Building Z / first floor/Elektrotechniek

Pleinlaan 2 / 1050Brussel / BELGIUM

Mobile: +32 486 99 74 51

Fax +32 2 629 36 20

http://mobi.vub.ac.be