Product News January 27, 2012

"Energy-generation" & "energy-storage"-type Energy Management System
Installed in Komekurayama Mega-solar PR Facility in Yamanashi

Ippei Takeda, Chairman & CEO
Contact: Tadahiro Yamaguchi, Director,
General Manager "NECST" Project
  TEL. 81-75-231-8461
FAX. 81-75-256-4158


NICHICON CORPORATION will install and begin operations of an "energy-generation" & "energy-storage"-type energy management system in the public relations facilities of Komekurayama Mega-solar Power Plant in Yamanashi prefecture ("Solar power facility in Yamanashi Prefecture Public Relations"). This system is able to store renewable energy generated by photovoltaic and hydro power generators and supply energy for charging electric vehicles (EV) and also provide illumination and air conditioning in the facilities.

We have installed a solar power system with storage capabilities utilizing our own electric double layer capacitors on the roof top of the headquarters building. We have also been working on the development of utility grid interface storage systems that can store electricity generated by wind power generators in lithium-ion batteries in order to smooth out the significant fluctuations inherent in wind-based production. To take full advantage of these technologies, we combined photovoltaic power generation, lithium-ion battery packs, and quick chargers into this single management system, thereby unifying the battery management, electric double layer capacitor (EDLC), and utility interaction power electronics technologies that we have accumulated so far in order to achieve even higher performance. Furthermore, we will be delivering similar systems for rapid charging systems for EV in the Suita Service Area of the Meishin Expressway etc. and extend our reach.


Background of Development

Since the Tohoku Earthquake that occurred last year, the methods of supplying power in Japan underwent a complete change; addressing electric power shortages and further implementation of renewable energy are now the pressing issues. In response to this situation, the Komekurayama Mega-solar Power Plant was constructed in Yamanashi prefecture, and the plan of introducing a power supply system that can operate independently using renewable energy only for the PR facility was put into motion. We worked hard on the development, making use of existing technologies as well as developing new engineering methods and know-how along the way in order to construct this system, which is the first of its kind in the world.

We supply DC-DC converters integrated with in-vehicle chargers for Mitsubishi Motors Corporation's "i-MiEV" and in-vehicle chargers for Nissan Motor Co., Ltd.'s "LEAF" electric vehicles. We also started volume production of the lightest and smallest quick-chargers in the world for use in in-vehicle chargers. Our systems, which combine photovoltaic power generators, lithium-ion battery packs, and quick-chargers, were evaluated highly for the technologies and won the State Minister for the Environment award at the Excellent Electrical Construction Equipment and Materials Fair in 2011.

The greatest feature of the power supply system we developed this time is that it is able to store electric energy generated by photovoltaic and hydro power generators in lithium-ion battery packs and EDLC devices and supply it to the PR facility and quick chargers for EV. It also aims to be carbon-free by operating independently on fuel cells, thereby using minimum system power.


Main Features

  • It combines renewable power generated by multiple sources, power storage devices, and fuel cells and is able to supply stable power with optimal control.
  • By utilizing both lithium-ion battery packs and EDLC devices as storage devices, it is able to absorb rapid fluctuations in the renewable energy supply and extend the lifetime of the lithium-ion batteries.
  • By utilizing a direct-current system for the quick chargers, it achieves higher total efficiency.

Main Specifications

Output voltage : DC 50V - 500V (rapid charging, CHAdeMO)
AC 200V 1 (in-house electricity)
Output capacity : 30kW (rapid charging)
6kVA (in-house electricity)
6.8kW (hydrogen generator)
Input capacity : 20kW (photovoltaic generation)
1.5kW (hydro power generation)
0.75kW (fuel cell)
Storage capacity : 32kWh (lithium-ion battery)
External dimensions : 3130 mm (W) x 850 mm (D) x 2300 mm (H)
Energy management system, energy storage device, charger for EV (not including stands)
3-1, Yagura 2-chome, Kusatsu-shi, Shiga Pref., 525-0053 Japan
(Obtained ISO9001, ISO14001 certifications)


Head Office Location : Karasumadori Oike-agaru, Nakagyo-ku, Kyoto
Representative : Ippei Takeda, Chairman & CEO
Established : August 1, 1950
Capital : 14,286 million yen (As of March 31, 2011)
Employees : 8,219 (As of March 31, 2011 Consolidated)
Business Description : Production and sales of: Various kinds of Capacitors for Electronics, Electric Apparatuses and Power Utilities
Function Modules
Positive thermistors
Switching power supplies
Capacitor applied system and equipment
Net Sales : 105,914 million yen (As of March 31, 2011 Consolidated)

"Energy-generation" & "energy-storage"-type energy management system installed in the Komekurayama Mega-solar PR facility in Yamanashi Prefecture

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