Keihanna Eco-City Next-Generation Energy and Social Systems Demonstration Project

V2X; aiming at alleviating power demand in a wide range of facilities with the use of EVs

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Optimal control over recharging/discharging storage batteries without compromising the functions of the vehicle.

Release:2013/02/05Click here for news items >>
An initiative to alleviate power demand in factories by using electric vehicles (EVs) as storage batteries when parked together with reused EV storage batteries has been started as part of the Keihanna Eco-City verification experiment. A V2X (Vehicle to X) experiment is taking place in Mitsubishi Motors' factory estate. The main issue here is how to make the most effective use of EV storage batteries without compromising the true function of electric vehicles as modes of transportation. This involves methods of controlling the recharge and discharge of electricity incorporating the use of vehicles in order to discover the potential of EVs as "mobile storage batteries."

The Keihanna Eco-City Next-Generation Energy and Social Systems Demonstration Project aims at establishing energy management for the entire town. One of the themes of the project is to utilize the storage batteries mounted onto electric vehicles (EVs) as they become more and more widely used.

The development of technology aimed at extending the distance that EVs can travel and reducing vehicle costs, as well as establishing recharge infrastructures, are indispensable elements in attaining the widespread use of EVs. However, focusing our attention on the storage batteries mounted onto EVS will show that the way in which EVs can be used and their value is greater than the sum of their conventional use as modes of transportations. In other words, they can be used as mobile storage batteries; a function that gasoline-operated cars cannot aspire to.

The verification experiment for utilizing these mobile storage batteries is represented by V2X (Vehicle to X), which is being carried out at Mitsubishi Motors' Nagoya Plant in the Okazaki district (Okazaki City, Aichi Prefecture). (Photo #1) Similar verification experiments include V2G (Vehicle to Grid) and V2H. (Vehicle to Home) The V2X experiment envisages establishing connections to communities, factories and offices, etc., in addition to the grid and homes.


Photo #1. A panoramic view of the building in which the V2X verification experiment is being carried out at Mitsubishi Motors' Nagoya production plant in the Okazaki district.

Photo #1. A panoramic view of the building in which the V2X verification experiment is being
   carried out at Mitsubishi Motors' Nagoya production plant in the Okazaki district.

    The building in the background is the main production building. (Photograph by Hidekazu Ueno)


The experiment equipment being used for this project has been constructed by Mitsubishi Corporation, Mitsubishi Electric Corporation and Mitsubishi Motors Corporation between the main production building and the employee parking lot in Mitsubishi Motors' Okazaki district. Solar power panels with an output capacity of 20 kW manufactured by Mitsubishi Electric have been installed on the roof. Parking space for five i-MiEV (EV) vehicles is available beneath the roof, and five storage batteries that have been used in i-MiEVs for one year have been installed in the loft of the building. (Photo #2) This is to run an experiment on the reuse of EV storage batteries.


Photo #2. i-MiEVs used to control the supply and demand of electricity (bottom) and reused storage batteries installed in the loft. (top)

Photo #2. i-MiEVs used to control the supply and demand of electricity (bottom) and reused
   storage batteries installed in the loft. (top)

    The optimal control of i-MiEVs and reused storage batteries for recharging purposes in accordance with the
    power demand of the main production building and the amount of electricity generated by the solar power
    panels. (Photograph by Hidekazu Ueno)


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