| 摘要 |
PROBLEM TO BE SOLVED: To prevent a battery from falling into such a state in which sufficient power cannot be extracted from the battery before temperature rising control is performed.SOLUTION: Before performing temperature rising control, a control unit calculates: a timer temperature rising start time tfor starting the temperature rising control; and a lower limit threshold arrival time twhen a battery temperature Tb becomes lower than a lower limit threshold T. When the lower limit threshold arrival time tis earlier than the timer temperature rising start time t, the control unit performs, before performing the temperature rising control, temperature retaining control of raising temperature of a drive battery using a heater so that the battery temperature Tb becomes equal to or more than the lower limit threshold Tand less than a target temperature T.SELECTED DRAWING: Figure 3 |
