NOVELTY - The system has a temperature sensor (1) for sensing an internal temperature of a battery pack assembly. A current sensor (2) senses an output current of the battery pack assembly. A fuzzy controller (3) performs fuzzy control by using outputs of the temperature sensor and the current sensor as inputs to output a duty ratio of a cooling blower. A pulse-width modulation (PWM) controller (7) performs PWM control by using an output of the fuzzy controller as an input to output a control signal for driving the cooling blower.    USE - System for controlling a cooling blower that is utilized for reducing heat generated in driving of a high-voltage battery of a hybrid vehicle e.g. gasoline-powered and electric-powered motor vehicle such as sports utility vehicle (SUV), bus and lorry, a watercraft e.g. boat and ship, and an aircraft. Can also be used for an electric vehicle, plug-in hybrid electric vehicle, hydrogen-powered vehicle, and vehicle with fuels derived from resources other than petroleum.    ADVANTAGE - The fuzzy controller performs the fuzzy control by using the outputs of the temperature sensor and the current sensor as the inputs to output the duty ratio of the cooling blower, and the PWM controller performs the PWM control by using the output of the fuzzy controller as the input to output the control signal for driving the cooling blower, thus dynamically, practically and efficiently controlling the cooling blower with respect to heat emission of a battery pack, and hence lengthening a lifespan of the battery pack assembly.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) a cooling blower control method    (2) a non-transitory computer readable medium comprising instructions for performing a cooling blower control method.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a cooling blower control device for a high-voltage battery.    Temperature sensor (1)    Current sensor (2)    Fuzzy controller (3)    PWM controller (7)