| CPC B60L 1/08 (2013.01) [B60L 58/27 (2019.02); B60L 2240/36 (2013.01)] | 5 Claims |
|
1. A battery electric vehicle comprising:
a battery;
an inverter that includes three arm circuits, in each of which an upper switching element connected to a positive electrode of the battery and a lower switching element connected to a negative electrode of the battery are connected in series;
a motor that includes three coils, one end of each of which is connected to a neutral point and another end of each of which is connected to a midpoint of a corresponding one of the three arm circuits;
a relay that connects between the neutral point and a positive electrode of an external power supply;
a ground wire that connects between the negative electrode of the battery and a negative electrode of the external power supply; and
a controller configured to perform control so as to independently turn on and off three lower switching elements and three upper switching elements, and to be capable of charging the battery by boosting a voltage of the external power supply, wherein:
the controller is capable of selectively executing normal charging operation and heat generation charging operation;
in the normal charging operation, an equal current flows in all the three coils in a positive direction from the neutral point toward the arm circuit; and
in the heat generation charging operation, a first current flows in the positive direction in at least one of the three coils, and a second current flows in an opposite direction from the arm circuit toward the neutral point in another coil of the three coils, a total value of the first current being greater than a total value of the second current.
|