Japan first: 24kWh-class lithium secondary battery electricity storage system begins grid connected operation |
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24 kWh-class lithium secondary batteries
24 kWh-class lithium secondary battery electricity storage system and 270 Wh-class battery(On the right)
After receiving approval from the Natural Resources and Energy Agency, MHI installed Japan's first electricity storage system based on the use of lithium batteries in Nagasaki Research & Development Center, a first for Japan and connected the system to a electricity grid inside the Research and Development complex for the purpose of trial operation. MHI has been carrying out a cooperative project with Kyushu Electric Power with the aim of producing safe and low cost, large-scale electricity storage batteries made from lithium containing manganese materials with the maximum energy density of 160 Wh/kg. These batteries are in the 270 Wh capacity class. Last year, the development of an electricity storage system using these batteries was begun and this year, in March, a system with the world's largest capacity that uses secondary batteries was completed. This system was a pilot-stage, 24 kWh commercial equipment that has an electric power conversion efficiency ratio of 86 %. This equipment can store relatively low cost electricity produced at night and provide this power to users during the day, that helps to low user power costs. One unit has the capacity to supply the power requirements of two average homes. Multiple units can be combined to fill power requirements of larger scale.
In the future, the trial grid connected use of this product will grow the actual experience using the test based lithium battery-manufacturing equipment in Nagasaki shipyard, furthermore, the start of shipment of test orders, development of customers and commercialization of the product is planned for beginning of the new business year.
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