Heating control device

A heating control device comprising:

• a storage battery that supplies electric power to an electric motor as a driving source of an electric vehicle;
• a heat generation portion that heats the storage battery using heat generated by current flowing;
• an effective capacity estimation portion that estimates a change in effective capacity when the heat generation portion heats the storage battery to a target temperature using heat generated by current flowing due to electric power supplied from the storage battery based on an effective capacity of the storage battery corresponding to a temperature of the storage battery and a state of charge of the storage battery;
• a first controller that causes a current to flow from the storage battery to the heat generation portion only in a case where the effective capacity estimated by the effective capacity estimation portion is expected to be improved;
• and
• a second controller that lowers a lower limit temperature of the storage battery stepwise depending on a duration time during which the electric vehicle is not operated and that controls current flowing from the storage battery to the heat generation portion every time the temperature of the storage battery decreases up to the lower limit temperature.