| 摘要 |
<p>PURPOSE:To provide a power supply for an electric vehicle capable of travelling for a given period of time even in the case of trouble due to unexpected storage battery capacity shortage. CONSTITUTION:This electric power supply is furnished with a main battery X to drive a motor, an auxiliary battery Y for a on-vehicle load except for a motor load and a storage battery connection switch RY1, the motor load at the time of steady-state travelling is supplied from the main battery X, and when capacity of the main battery is used up, by changing over the storage battery connection switch RY1, electric power is supplied to the motor load from the main battery X and the auxiliary battery Y serially connected to each other. A discharge current at the time of starting an electric automobile reaches several times of a discharge current in the travelling state, but if only this large electric current is supplied at the time of starting, it becomes possible to travel with comparatively small electric current discharge, and accordingly, it is possible to completely use remaining capacity of the main battery and to travel at the lowest limit.</p> |
