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[B-17.4 Preparation of System for Adequate Charge and Operation]

[Contact Person]

Yoshitaka Tatsue
Director, Machinery Dept.
Mechanical Engineering Lab., AIST, MITI
1-2 Namiki, Tsukuba, Ibaraki 305 Japan
Phone +81-298-58-7058, Fax +81-298-58-7129

[Total Budget for FY1991-1993]

33,873,000 Yen (FY1993 11,475,000 Yen)

[Abstract]

　Wide spreading of electric vehicles(EVs) is anticipated to reduce the emission of carbon di-oxide in traffic use. But, many factors affect the wide spreading of EVs. How to manage battery charging/discharging is not only important to get higher energy efficiency but also important to get longer battery life.
　Following devices and methods are developed to clarify the adequate charging procedure to get high charging efficiency and managing procedure to get longer battery life.
　State of charge indicator have been made and was tested with the battery installed in the charge/discharge simulator. Universal charger has also been developed to discuss the charging algorithm suitable for every EVs. Unbalance of battery in battery blocks are also discussed.

[Key Words]

Electric Vehicle, Battery, Charge, Maintenance, State of Charge