GS Yuasa installed a lithium-ion battery system at testing facilities in Iki City, Nagasaki Prefecture in order to study the optimal methods to use storage batteries to control power system frequency fluctuation on remote islands. The system was constructed by Mitsubishi Electric Corporation Kyushu Electric Power Co., Inc., and has been operating successfully at the power company’s Ashibe substation in Iki City since March 2013. The tests are scheduled to continue through fiscal 2014. The lithium-ion battery system is being used to charge and discharge power during periods when power generation from wind, solar and other renewable power sources changes suddenly, thereby stabilizing the amount of power delivered to the power grid and controlling the system’s frequency fluctuation.
The lithium-ion battery system installed at the testing facilities comprises eight storage battery units, housing 96 LIM50E modules. The entire system is housed within two storage battery enclosures measuring 10 meters wide by 7 meters deep.
System Overview:
Module type: LIM50E-12G2-C2 (12-cell modules)
Number of batteries: 9,216 cells (8 units, each comprising 16 modules connected in series and 6 modules in parallel)
Capacity (kWh): 1,616 (202 x 8 units)
Nominal voltage (V): 710.4
Dimensions (mm): W4800 x D850 x H2050 (per unit)
Mass (kg): Approx. 4,600 (per unit)
Cooling system: Self-cooling

Lithium-ion Battery