EC Capacitor modules are designed to optimally meet energy-storage requirements of specific applications at the highest level of reliability and lowest possible cost. In some applications, the EC Capacitor is the only energy-storage technology used while in others it is combined with power generation or battery storage. ECCAP Session 3 reviewed EC module design and system engineering to meet performance goals of key applications, including those related to transportation, to industrial energy conservation, and to the utility grid.
Session Chairman:
Michael Meinert, Head of R&D-group Energy Storage Systems, Smart Grid Division, Infrastructure & Cities Sector, Siemens AG
Dr. Meinert graduated in electrical engineering, Electrical Railway Systems, from Dresden University of Technology, Germany in 1995 and received his doctorate in electrical engineering from Darmstadt University of Technology, Germany in 2007. His employment experience included the Siemens AG, Erlangen since 1995 in the field of Rolling Stock and Railway Power Supply as well as the Darmstadt University of Technology from 2001 to 2004. He is currently the Head of the R&D-group for energy storage units/systems as well as overhead contact line free systems at the Siemens AG, Infrastructure & Cities Sector. His special experience include railway systems, High Temperature Superconductivity and innovative energy systems.
SESSION AGENDA
Today's Research in Aqueous Electrochemical Capacitors: from Oxides to Nitrides Prof. Thierry Brousse, Professor of Material Science, University de Nantes
Abstract
This presentation is dedicated to the improvement of energy density of carbon-based electrochemical double layer capacitors (EDLCs). Carbons are reaching a limitation in terms of pore size distribution and specific surface area. Even if the recent progress in tuning pore size and size of ions from ionic liquids have led to interesting perspectives for enhancing double layer capacitance, other ways must be found to drastically improve the energy density of carbon/carbon EDLCs.
Since the last 5 years, our group has developed a strategy aiming at functionalizing carbon surface in order to improve the capacity of EDLCs. Redox electroactive molecules can be attached at the surface of activated carbon in order to add a faradic component to double layer capacitance. The energy density is thus increased up to a factor of 2. However, special attention must be given at the power capability of such composite electrode compared to pristine carbon as well as cycling ability. Indeed, the electrode performances are drastically dependant on the way the electroactive molecules are linked to the carbon surface. This can be achieved for aqueous based electrolytes or even organic based electrolytes thus increasing the overall capacitance and as a side effect enlarging the cell voltage of the EDLCs.
This communication will focus on:
Expected gain from functionalized carbons:
What is the level of energy density that can be achieved by surface functionalization of carbons?
What are the main parameters governing the improvement of capacitance (capacity) of carbon based EDLCs by grafting electroactive molecules?
Practical examples:
Some example of functionalized carbons in aqueous or organic electrolytes will be presented
An asymmetrical design in organic electrolyte will be detailed
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Ultracapacitor Solutions: Do the Math! Michael Everett, Chief Technical Officer, Maxwell Technologies
Abstract
This talk will take a detailed look at energy storage economic modeling using ultracapacitors in 5 different applications and show how ultracapacitors cost less (most of the time) than solutions using other energy storage or alternative power deliver methods. The intent is to bring appreciation to the considerations of the value proposition for ultracapacitors and to enlighten the listener with regards to the often overlooked economics of using ultracapacitors. In a developing market, selling on value proposition is difficult at best. Reduced or minimized initial cost outlay is the best way to penetrate such a market and this is absolutely the case for ultracapacitors. Therefore, the listener should not consider this talk as backing off from the hard position that without reduced costs of the raw materials and the devices themselves, the market is forever limited and market penetration will be stunted. But for the sake of the future and to gain an appreciation for another way to dice up the consideration we will shed light on the aspects of economics for ultracapacitor projects and the cost benefits of the technology. Don’t expect to dissect the costs down to bill of materials level, but rather be ready to look at and challenge the broadly accepted myths and lore about why the false economics keep ultracapacitors out of the most appropriate applications for their capability.
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Elton Asymmetric Supercapacitors in Energy Storage Applications Sergey Ulyakhin, Project Director, ELTON, JSC
Abstract
Bulk energy storage has become one of the critical issues nowadays. While the amount of intermittent power (wind, solar, etc.) is increasing, the more energy storage comes into need. ELTON has developed the so called Asymmetric Lead-Acid Supercapacitors – a new cheap alternative to the available candidates for the bulk energy storage systems.
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16V 200F Ultracapacitor Module for Automotive Application Ken Rudisuela, Chief Technical Officer, Ioxus
Abstract
This presentation describes the development of an ultracapacitor module to be used in a micro-hybrid automotive application. The size of the module considers start/stop applications with voltage stabilization for auxiliary loads. To facilitate the Japanese market, a new 1200F PC cylindrical ultracapacitor has been developed, which has high durability and cycle-life and charge acceptance suited for brake energy re-cooperation.
The presentation describes the engineering process which focuses on designing specifically to International conformance standards. Simplicity of design was considered to minimize cost and to maximize manufacturing efficiency. Details associated with shock, vibration and thermal characterization will be shown.
Finally, ongoing start/stop performance data will be shown.
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Automobile Fuel Efficiency Improvement with DLCAPTM Electrochemical Capacitor Energy Storage Toshihiko Furukawa, Senior Manager, Nippon Chemi-Con Corporation
Abstract
There are two typical energy storage technology in automotive application which will be Battery and Ultracapacitor (Electrochemical Capacitor). Battery is most likely energy device and Ultracapacitor is a power device. The battery has been dramatically improved the power performance. However, the charge acceptance capability of the short duration time 1 -10 second is ultracacapacitor is over 90% efficiency and battery will be less than 60%. DLCAP™ Electrochemical Capacitors have been implemented into passenger vehicles for the energy recovery system to save fuel consumption. Newly developed concept car at MAZDA motor corporation has i-ELOOP™ energy recovery system with DLCAP™ Electrochemical Capacitors and it has been started production. The average fuel consumption has been improved over 10% with the energy recovery system i-ELOOP™.
Focusing pints here in this presentation are:
Charge acceptance for Battery vs Electrochemical Capacitor
Fuel saving with the energy recovery system
Requirements
Life expectancy
Abuse test.
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New Progress in Lithium Ion Capacitors(LIC), ULTIMO™ Atsushi Shirai, Assistant Manager, Product Development, JM Energy Corporation
Abstract
JM Energy, part of the JSR group develops, manufactures, markets and sells lithium ion capacitors, ULTIMO™ for a wide range of efficient energy storage solutions.
Lithium ion capacitors, ULTIMO™ are asymmetric capacitors developed & commercialized by JM Energy. Their major features are high power, high energy, slow self discharge, and safety.
Significant performance improvements have been realized by utilizing improved materials sets on the generation 2 cells. This has resulted in a 70% reduction in DCIR relative to the first generation ULTIMO™ cells.
Comparison table of cell properties
Fig. 1 and Fig. 2 illustrates the performance of the improved generation 2 cells. In the presentation, cell performances and recent applications in various fields will be explained in detail.
Gen 2 ULTIMO™ cells with low resistance and high durability will extend LIC applications to the automotive market.
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DLC Applications - a Long Way to the Railway Market Dr. Michael Meinert, Head of Energy Storage Systems, Smart Grid Division, Infrastructure & Cities Sector, Siemens
Abstract
Mobile and stationary Energy Storage Systems (ESS) can be a key element which increases the energy efficiency while reducing overall energy consumption for urban public transport. Furthermore ESS on trams can avoid using the overhead contact line entirely along segments of the track. The overall system is designed for an optimal use of energy because it stores the vehicle’s braking energy for later usage by the propulsion and other vehicle auxiliary loads. Less energy consumption leads to lower CO2 and “greenhouse gas” emissions. Reduced “visual impact” ensures an appropriate integration of Light Rail Vehicles (LRV) into an already existing infrastructure.
Since more than 10 years the railway business is pioneering Double-Layer Capacitor-ESS for several applications by prototypes and small series. Nowadays it seems that DLC-ESS are more and more requested by the railway market. Nevertheless ESS are additional components causing additional effort and costs for the overall integration onto trams and into the rail power supply systems. The benefits of DLC-ESS has to satisfy their usage by new functionalities and / or a ROI (Return On Invest) within a short time. Preconditions for their successful way to the railway market have to be safe operations and high availability and reliability as well as less LCC. And, DLC-ESS have to compete against other energy storage technologies by forthcoming improvements of their power end energy density.
The presentation will focus on some mentioned issues above and will close with a prospective view.
JM Energy, part of the JSR group develops, manufactures, markets and sells lithium ion capacitors, ULTIMO™ for a wide range of efficient energy storage solutions.
