Technology
According to a
research company, the world capacitor market that combines the lithium-ion type
and electric double layer type is expected to increase 3.5 times over the level
in 2010 to about 300 billion yen in 2016. Meidensha developed a capacitor whose
volume is one third of the volume of the conventional capacitor in alliance
with Sumitomo Electric using Sumitomo Electric’s lightweight metallic material
that is excellent in conductivity. Because a capacitor can run electric components
of a car besides lengthening the life of a lithium-ion battery, it will helpful
to reduce the capacity of a battery and increase fuel consumption.
The conventional
electric double layer capacitor uses aluminum foil or activated charcoal for
the electrode material, but the newly developed capacitor uses Aluminum Celmet developed by Sumitomo Electric. Because this material has small holes on the surface and
inside, it is 30% lighter than nickel and two times higher in electric
conductivity than the existing capacitor. The new capacitor is 15 cm deep and
13 cm wide. Despite the small size, it has five times more storage capacity and
creates 10 times more instantaneous power than the existing capacitor.
Meidensha plans to commercialize the new capacitor before 2015 to get 30% share
in the environmentally friendly vehicle market by 2020 with sales of 50 billion
yen.
Introduction of lithium-ion capacitor
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