| 摘要 |
<p>The charging/discharging of a battery is controlled while the state of the battery is monitored to improve the efficiency of the battery and prolong the operating life of the battery. The speed of a car which is detected by a car speed sensor and the rotational speed of the internal combustion engine which is detected by a revolution sensor are inputted to a program controller, which controls an inverter which performs the AC-DC conversion or DC-AC conversion between a motor-generator coupled with the internal combustion engine and a battery loaded on the air. At the same time, the charging/discharging current (i) detected by a current sensor is inputted to the program controller, which calculates the integral I of the charging/discharging current (i) with respect to time and controls the charging current of the battery at the time of regenerative braking and the discharging current of the battery at the time of travelling. The overall life of the battery is prolonged, the energy lost by braking is regenerated as much as possible and, even if the variation in the characteristics of unit cells exists, the increase of the variation is suppressed. Further, the battery cost is reduced and the maintenance is simplified.</p> |
