Patent ID: 9738175
Date: 2017-08-22
CPC Classifications: B60L,Y02T

Claim:
1. A drive device comprising: a first energy storage; a second energy storage which is superior to the first energy storage in energy to weight density and inferior to the first energy storage in power to weight density; a booster to boost a first voltage output from the first energy storage; a motor to be driven by power output from at least one of the first energy storage and the second energy storage; and a controller to control the booster to operate in a first mode while a voltage point is within a referenced closed region and to operate in a second mode while the voltage point is outside the referenced closed region, the voltage point representing a relationship between the first voltage and a second voltage output from the second energy storage in a two-dimensional coordinate system having a first axis representing the first voltage and having a second axis representing the second voltage, the first axis being perpendicular to the second axis.