Power source system and power source system control method

A power source system comprising:

• a power source mounted in a vehicle;
• a drive motor;
• a thermometer configured to measure a temperature of the power source;
• one or more processors that execute computer-executable instructions stored in a memory,
• wherein the one or more processors execute the computer-executable instructions to cause the power source system to:
• sense a sloped road;
• control at least torque of the drive motor,
• in a case that a demand for high output is made to the drive motor and the temperature of the power source is less than a prescribed temperature, or in a case that the demand for high output is made to the drive motor, the temperature of the power source is greater than or equal to the prescribed temperature and the vehicle is travelling on a downhill road, implement a torque limitation of the drive motor to limit the torque to be lower than a maximum torque output by the drive motor,
• make a detection, after a period in which the demand for high output was made while the temperature of the power source was less than the prescribed temperature or when the temperature of the power source is greater than or equal to the prescribed temperature while the vehicle is traveling downhill, that the demand for high output is no longer being made to the drive motor or that the temperature of the power source is no longer less than the prescribed temperature and the vehicle is no longer travelling downhill, and
• suspend the torque limitation in response to the detection.