Control strategy and lifetime optimization of Electrochemical Double-Layer Capacitors
(2014)Department of Automatic Control
- Abstract
- Today, the most commonly used energy storage device in embedded systems is batteries. But unfortunately, batteries are associated with short lifetime. By introducing Electrochemical Double-Layer Capacitors (EDLCs) as an alternative power source, the lifetime of the backup energy source can be significantly increased.
The lifetime is dependent on two predominant factors; temperature and voltage. To evaluate the aging behavior of EDLCs, accelerated lifetime tests where performed. The measurements were carried out on capacitors from two different manufacturers (Cooper Industries and Maxwell Technologies). The results were then used for lifetime estimations.
To accomplish an increased lifetime, a control system is suggested which... (More) - Today, the most commonly used energy storage device in embedded systems is batteries. But unfortunately, batteries are associated with short lifetime. By introducing Electrochemical Double-Layer Capacitors (EDLCs) as an alternative power source, the lifetime of the backup energy source can be significantly increased.
The lifetime is dependent on two predominant factors; temperature and voltage. To evaluate the aging behavior of EDLCs, accelerated lifetime tests where performed. The measurements were carried out on capacitors from two different manufacturers (Cooper Industries and Maxwell Technologies). The results were then used for lifetime estimations.
To accomplish an increased lifetime, a control system is suggested which monitors the capacitance and controls the applied voltage i.e. ptimizing the amount of stored energy. A complete power back up system with EDLCs as power source and an associated control system, was built and simulated in Simulink. Furthermore, an electrical hardware prototype was implemented to create a proof-of-concept. It is found that the lifetime can be significantly increased when controlling the applied voltage, since the voltage can be held as low as possible at all time. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/4464268
- author
- Alagic, Samir and Nordgren, Viktor
- supervisor
- organization
- year
- 2014
- type
- H3 - Professional qualifications (4 Years - )
- subject
- keywords
- Supercapacitor, Ultracapacitor, Electrochemical Double-Layer Capacitor, Energy Storage, Power Source, MATLAB, Simulink, Embedded Systems, Aging, Lifetime Estimation, Voltage Control, Control System.
- ISSN
- 0280-5316
- other publication id
- ISRN LUTFD2/TFRT--5940--SE
- language
- English
- id
- 4464268
- date added to LUP
- 2014-06-13 11:15:14
- date last changed
- 2014-06-13 11:15:14
@misc{4464268,
abstract = {{Today, the most commonly used energy storage device in embedded systems is batteries. But unfortunately, batteries are associated with short lifetime. By introducing Electrochemical Double-Layer Capacitors (EDLCs) as an alternative power source, the lifetime of the backup energy source can be significantly increased.
The lifetime is dependent on two predominant factors; temperature and voltage. To evaluate the aging behavior of EDLCs, accelerated lifetime tests where performed. The measurements were carried out on capacitors from two different manufacturers (Cooper Industries and Maxwell Technologies). The results were then used for lifetime estimations.
To accomplish an increased lifetime, a control system is suggested which monitors the capacitance and controls the applied voltage i.e. ptimizing the amount of stored energy. A complete power back up system with EDLCs as power source and an associated control system, was built and simulated in Simulink. Furthermore, an electrical hardware prototype was implemented to create a proof-of-concept. It is found that the lifetime can be significantly increased when controlling the applied voltage, since the voltage can be held as low as possible at all time.}},
author = {{Alagic, Samir and Nordgren, Viktor}},
issn = {{0280-5316}},
language = {{eng}},
note = {{Student Paper}},
title = {{Control strategy and lifetime optimization of Electrochemical Double-Layer Capacitors}},
year = {{2014}},
}