成果報告書詳細
管理番号20120000000062
タイトル*平成22年度中間年報 蓄電複合システム化技術開発 要素技術開発 既存都市再開発型スマートコミュニティモデル構築に向けた蓄電池利用技術及びエネルギーマネジメントシステムの開発実証(9)
公開日2012/6/29
報告書年度2010 - 2010
委託先名株式会社エヌ・ティ・ティ・ドコモ
プロジェクト番号P10008
部署名スマートコミュニティ部
和文要約和文要約等以下本編抜粋:
1. 共同研究の内容及び成果等
(1) 平成22 年度の研究開発の範囲
本研究は、分散型電源の大量導入に伴い今後普及が見込まれる定置型蓄電池の普及に関する課題のうち、蓄電池単体では解決することが難しい問題について、リチウムイオン蓄電池を複数利用し、それらを管理および共同利用する「定置型蓄電池のシェアモデル」の実現で解決が図られるかを検討することを目的としている。
英文要約Title : R&D of Practical and integrated Energy storage systems for smart
community/elemental technology development/Development and Demonstration of Battery-Application Technologies and of Energy Management Systems Aimed at the Creation of a Smart Community Model for the Redevelopment of Existing Urban Areas (FY2010-2012) FY2010 Annual Report
With the spread of stationary battery systems expected with bulk installations of distributed power sources, there are problems with single batteries systems. This research aims to demonstrate that these problems can be solved by using and controlling multiple lithium ion battery systems, through a “stationary battery share model.” This 3-year research project is in its first year. To realize this stationary battery share model, an intermediate platform, home ICT and battery systems were designed and prototyped in FY2010.The platform collects consumption data from households, charge data for shared batteries etc, and issues charging/discharging instructions. The home ICT system consists of a home server that communicates with the platform and battery systems, sensors to obtain information such as household power consumption, and a monitor to display the information. Monitoring is possible with a mobile phone, however mobile functions were not developed in FY2010, since a PC was used as the home server. The battery system consists of a controller section to communicate with the home servers and the platform and receive instructions, battery management section to monitor batteries and collect data, bidirectional converters, and the batteries themselves. This development focuses on the following two technological issues. One is reducing the life cycle cost of batteries, by lengthening battery life. To achieve this, we are developing new technologies that control and optimize charge/discharge cycles of batteries by sharing multiple batteries, unlike single battery systems, in which charge/discharge cycles depend only on customer’s usage. The control system lowers the upper SOC voltage to prevent full charge or complete discharge and limits the charge/discharge current to extend battery life. Also, battery availability must be raised, because battery capacity is limited, and extra power must be sold to the grid or wasted. Similarly, if solar generation is lower than consumption, demand can be covered by battery discharge, but the shortfall must be bought. Thus, more battery availability can reduce the time that charging/discharging is impossible, and reduces the need to either buy or sell power to the grid. This operating efficiency is expressed by the equation below. Operating efficiency = average possible charge and discharge time /(average possible charge and discharge time + average impossible charge and discharge time) We aim to increase battery availability by using differences in consumption at different time slots. Power generated with solar in the same area is mostly transmitted at the same time, but households and business use electricity at different times for different reasons, so, we are developing technologies to group customers with different usage patterns to increase availability through battery sharing. We plan to begin demonstrating this in company housing in Yokohama from FY2011.
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