| 摘要 |
Provided is a battery temperature control device configured to automatically heat a battery with a battery-driven heater so that the battery does not freeze at a minimum electric power consumption when the battery is out of use. The battery temperature control device predicts, based on a combination of a battery temperature and an outside air temperature, a predictive time that the battery temperature is likely to be less than a first set temperature, while the battery temperature is higher than or equal to the first set temperature at which there is no risk of freezing, and sets the predictive time as the next controller startup time, and determines whether or not the battery temperature has fallen to below the first set temperature with a control program wakeup when the predictive time has expired, and battery-drives the heater when the battery temperature fall has occurred, to heat the battery. |
| 主权项 |
1. A battery temperature control device for temperature-controlling by heating a battery with a heater when the battery becomes less than a predetermined temperature, comprising:
a battery-temperature fall time prediction means for predicting, based on a combination of a temperature of the battery and an outside air temperature, a predictive time before the temperature of the battery is likely to be less than the predetermined temperature, such that the battery temperature control device shifts to a sleep state that disables operation for determining whether or not the temperature of the battery is less than the predetermined temperature, after the predictive time for a battery temperature fall has been predicted; and a heating necessity determination means for determining a necessity of heating with the heater by starting up the battery temperature control device from the sleep state that disables operation for determining whether or not the temperature of the battery is less than the predetermined temperature and by determining whether or not the temperature of the battery is less than the predetermined temperature when the predictive time, predicted by the battery-temperature fall time prediction means, has expired, wherein, during a turned-OFF state of an ignition switch, (i) operation for predicting the predictive time before the temperature of the battery is likely to be less than the predetermined temperature, (ii) operation for shifting to the sleep state after the predictive time for a battery temperature fall has been predicted, and (iii) operation for determining the necessity of heating with the heater by starting up the battery temperature control device from the sleep state and by determining whether or not the temperature of the battery is less than the predetermined temperature when the predictive time, predicted by the battery-temperature fall time prediction means, has expired, are repeatedly executed. |
