Electrically powered vehicle and method for controlling electrically powered vehicle

A method for controlling an electrically powered vehicle,

• the electrically powered vehicle including
• a motor configured to generate vehicle driving power,
• a secondary battery configured to supply electric power to the motor, and
• a temperature sensor configured to detect a temperature of the secondary battery,
• the method comprising:
• determining whether or not the temperature of the secondary battery is more than a threshold temperature, the threshold temperature being determined based on a thermal destruction temperature of a sealing member configured to seal a space between a case of the secondary battery and an electrode terminal;
• determining whether or not an acceleration time period indicating a time period of continuous acceleration of the electrically powered vehicle is more than a predetermined time period;
• determining whether or not a temperature increase ratio of the secondary battery is more than a predetermined restriction value;
• and
• performing output restriction control to restrict an output of the secondary battery if the acceleration time period is more than the predetermined time period and the temperature increase ratio is more than the restriction value when the temperature of the secondary battery is more than the threshold temperature, wherein
• even when the temperature of the secondary battery is more than the threshold temperature, the output restriction control is not performed if the acceleration time period is less than or equal to the predetermined time period or if the temperature increase ratio is less than or equal to the restriction value.