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Lithium Battery & Fuel Cell Hybrid Systems Conference Documentation
Knowledge Press, Dec 2008, Pages: 83
Conference documentation for the following topics
Fuel Cell & Battery Hybrid Systems
Zhigang Qi, PhD, Fellow, MTI Micro Fuel Cells Inc.*
A fuel cell system can hardly run smoothly without a battery (or a capacitor). The crucial functions played by the battery when it is used to assist the fuel cell comprise of starting the fuel cell system, providing power during a power demand surge, and shutting down the fuel cell system after the fuel cell stack is turned off. The battery can also be used as the primary power source with the fuel cell as a charger. MTI Micro Fuel Cells Inc. develops direct methanol fuel cell systems that utilize neat methanol and unhumidified ambient air for portable applications. Thousands of hours of single cell life tests showed that the fuel cell decay rate could be controlled to 6% or less per 1000 hours. The fuel cell stack called Mobion® Chip has demonstrated an initial power density over 60 mW/cm2, 1.8 Wh energy output per gram of methanol, and higher than 80% fuel utilization. The fuel cell system can operate from 0 to 40°C ambient temperatures at any humidification levels. *In collaboration with: G.Lu, C.Carlstrom, and J.Prueitt
Commercial Direct Ethanol Fuel Cell/Li Ion Hybrid System for Portable Power Applications
John M. Pope, PhD, Director, NDC Power
This paper will present a new commercially available direct ethanol fuel cell integrated into a Li-ion hybrid portable power charging station. Fuel cell stack performance including >3,000 hours at 50 mA/cm2 will be detailed, along with an overview of the materials and engineering that have enabled a 90% reduction in stack costs over DMFC technology. Full system performance will also be detailed for a 20 W portable charging station that utilizes replaceable fuel cartridges.
Low- to Mid-Power Fuel Cell / Battery Hybrid Systems
Jeremy Steinshnider, PhD, Director of Fuel Cell Technology, Lynntech Inc.
This presentation will address current technological advances and market opportunities for fuel cell / battery hybrid power systems. An overview of recent technological advancements in Lynntech’s low- and mid-power fuel cell / battery hybrid power systems will presented. Specific topics to be discussed will include power management, thermal management, fuel cell architecture, and hydrogen generation.
Li Battery / Fuel Cell Hybridization to Extend System Lifetime and Usability
Mack W. Knobbe, VP of Engineering, Jadoo Power
Fuel cells and batteries are natural companions to creating an optimized power solution. Fuel cell sub-systems provide improved energy storage density while lithium batteries provide high peak power capabilities. Beyond this known advantage is the ability of the combination to extend the life of both components. Additionally, a hybrid power system can enable the use of an array of fueling options, including chemical hydrides that may not have hydrogen available immediately.
Expand the Life and Capacity of Lithium Battery in Plug-In Hybrid Electric Vehicles
Chris Mi, PhD, Chief Technical Officer, 1Power Solutions
Lithium batteries are considered as the only viable energy storage solution for PHEV. The main issues of lithium battery include cost, cycle life, calendar life, energy density, power density, and safety. In particular, battery safety and longevity issues are significantly magnified in PHEV. These issues can be addressed using a battery cell voltage equalizer. This presentation compares different balancing methods of lithium batteries. Several cell equalizer configurations will be explored, including passive balancing, active balancing, and 1Power ASIC based solutions.
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