Thermal management system for high power electrical equipment

A method for system for a battery pack being used to drive high power electrical equipment, the battery pack including multiple cells that are located in at least one enclosure, the system including at least one small temperature adjustment unit, at least one large temperature adjustment unit that has a thermal adjustment capacity greater than the small temperature adjustment unit, and at least one selector capable of operating the small temperature adjustment unit and the large temperature adjustment unit, the small temperature adjustment unit being thermally connected to the cells, the large temperature adjustment unit being thermally connected to the enclosure;

• at least one temperature sensor to measure temperature of the cells, and at least one capacity sensor to measure remaining capacity of the cells available for the electrical equipment;
• a microcontroller, so that the cells are maintained at a predetermined range of temperature;
• the method comprising:
• (a) configuring the temperature sensor to measure temperature of the cells and to output signals representative of the temperature, and configuring the capacity sensor to measure remaining capacity of the cells and to output signals representative of the remaining capacity;
• and
• (b) configuring the microcontroller to receive the signals from the temperature sensor and the capacity sensor, wherein the microcontroller decides whether or not to enable the small temperature adjustment unit, the large temperature adjustment unit, and the selector according to the signals of the temperature of the cells, and then operates the selector to start the small temperature adjustment unit;
• wherein when the remaining capacity of the battery pack is low, the system is configured to start the small temperature adjustment unit to reduce energy consumption of the battery pack when the small temperature adjustment unit, the large temperature adjustment unit, and the selector are enabled.