BATTERY TEMPERATURE REGULATING METHOD AND CONTROL DEVICE

A battery temperature regulating method includes: acquiring outside temperature information representing a future outside temperature transition around the vehicle, searching for an intersection time, which is a time when the outside temperature becomes a threshold temperature, predicting, based on the outside temperature information, a future temperature transition of the battery when it is assumed that predetermined temperature regulation is performed each time the battery reaches the threshold temperature, creating a temperature regulating plan for the battery, which is performed by the temperature regulating device, based on a search result of the intersection time and a prediction result of the temperature transition of the battery, and controlling the temperature regulating device based on the temperature regulating plan. In the processing of creating the temperature regulating plan, the temperature regulating plan in which details of the temperature regulation performed when the battery once reaches the threshold temperature is adjusted is created.