使用環境を想定した電動車椅子用蓄電池の低温特性評価と積雪期走行実験

概要

論文の詳細を見る
Not only handicapped people, but also elderly people living in Hokkaido, the northern most island in Japan, desire to participate in outdoor activities during a winter season that is characterized by heavy snow and low temperatures. A wheelchair is generally used for outdoor transport. There are, however, many problems with using wheelchair during the winter; roads covered with snow and ice are very slippery, casters are easily buried in snow, and handrims are too cold to handle. In winter use of a electricwheelchair, it is much important problem that the discharge capacity of battery extremely drops for low temperatures. In this work, batteries for the electric wheelchair were examined on charging and discharging under constant lower temperature. Batteries covered with foamed polyethylene were also tested at the same condition. In addition, we carried out driving tests of electric wheelchair to investigate discharging ability on fresh snowed road and compact snowed road in winter, and normal road in summer. As a result, in 0.2 C discharge rate, the discharge capacity at outer temperature of -20℃ dropped 34% in comparison with that at 30℃. When a battery was covered with formed polyethylene, the discharge capacity was 17% down. From driving test, the discharge capacity was affected by not only the outer temperature but also the road condition.
社団法人日本機械学会の論文
1999-04-25