Development of Japan’s First Large Capacity Cargo Container-Type Energy Storage System
Mitsubishi Heavy Industries has announced the development of Japan’s First cargo container-type large capacity storage system that uses lithium-ion rechargeable battery. This mobile energy storage system is capable of providing up to one megawatts of power ideal for use in emergency situations. The newly developed, “megawatt-class large capacity energy storage system (ESS)” is a 40ft container unit, housing more than 2,000 units of lithium-ion rechargeable batteries, plus a 20ft long container unit, where to power conditioners is installed.
The power conditioners on-board are used for DC/AC conversion and their input/output control. This mobile system has a capacity of storing 408 KWh of power and designed to have system efficiency of 90%. The power generated by this power storage system is enough to provide electricity to some 100 households for three to eight hours. Through use of multiple units of the system, power output can be increased to several tens of thousands of kilowatts. The development of this sort of large capacity energy storage systems are done mainly in countries and regions that are dependent largely on renewable energy, such as wind power and solar energy, that are susceptible to fluctuations in weather conditions.