Patent ID: 9731620
Date: 2017-08-15
CPC Classifications: B60L,Y02T

Claim:
1. A drive device comprising: a first energy storage; a second energy storage superior to the first energy storage in energy to weight density and inferior to the first energy storage in power to weight density; a boosting unit configured to boost an output voltage of the first energy storage to perform power distribution control; and a motor driven by power obtained from at least one of the first energy storage and the second energy storage, wherein in a two-dimensional coordinate system using a voltage of the first energy storage and a voltage of the second energy storage as variables, a voltage point representing a relationship between the voltage of the first energy storage and the voltage of the second energy storage is within a region that satisfies all the following conditions: a first condition which is that the voltage of the second energy storage does not exceed a withstand voltage limit of the motor; a second condition which is that the voltage of the second energy storage is lower than or equal to a value obtained by the boosting unit by multiplying the voltage of the first energy storage by a maximum boosting ratio; and a third condition which is that the voltage of the second energy storage is higher than or equal to a value obtained by the boosting unit by multiplying the voltage of the first energy storage by a minimum boosting ratio.