LEAF Batteries Enter After-Life Use As Energy Storage At Nissan Development Center In Japan
The joint venture between Nissan and Sumitomo, 4R Energy, is preparing to offer energy management services to businesses in Japan starting as early as next fall.
4R Energy is using old Nissan LEAF batteries, with 20-30% capacity loss.
One of the final steps before commercialization will be the set up of a 250 kW / 400 kWh power storage system at a Nissan development center in Atsugi, Kanagawa Prefecture. It should be ready in June 2015 and consists of 24 battery packs.
The purpose of the 400 kWh system will be to store electricity generated at night (off peak), when costs are cheaper, and to use it during the day. Expected savings should reach about 10% of energy costs.
There will be an implemented function to accommodate requests from power companies to curb usage. Additionally, the system will serve as an emergency power source.
If we assume 10-year use of batteries in electric cars (hopefully longer), we are just few years before the time when there will be thousands of old battery packs available. The number of old batteries with 70-80% capacity will then rise every year.