| 摘要 |
<p>An electric vehicle which can travel under a heavy load while satisfying miniaturization and reducing an impact on the environment by lengthening a range without driving an engine. The electric vehicle comprises an electric machine, inverters (28, 29) for driving the electric machine, a secondary battery connected with the inverters (28, 29) and supplying a current to the electric machine, a primary battery (33) connected with the secondary battery and having a lower output density and a higher energy density than the secondary battery, a section (44) for detecting the residual quantity of charge of the secondary battery, and a means for charging the secondary battery by supplying a current from the a primary battery (33) to the secondary battery when the residual quantity of charge becomes smaller than a threshold. Since the output density of the secondary battery is high, an electric vehicle can travel under a heavy load; and since the energy density of the primary battery (33) is high, a range can be lengthened by supplying the current of the primary battery (33) to the secondary battery.</p> |
