Cooling control system and control method of fuel cell

A cooling control system of a fuel cell, comprising:

• a fuel cell stack formed with a cooling flow path in which hydrogen and oxygen are received and reacted, respectively, and coolant flows between separators;
• a coolant circulation line connected with the cooling flow path of the fuel cell stack, and having the coolant flowing therein;
• a cooling pump connected to the coolant circulation line and configured to circulate the coolant to cool the fuel cell stack;
• a heat generation amount estimator configured to estimate a heat generation amount of the fuel cell stack;
• a coolant estimator configured to estimate an amount of coolant to cool the fuel cell stack based on the estimated heat generation amount of the fuel cell stack;
• and
• a driving controller configured to control an operation of the cooling pump based on the estimated amount of the coolant,
• wherein the heat generation amount estimator is configured to estimate the heat generation amount of the fuel cell stack based on a ratio between a theoretical voltage and an average cell voltage of the fuel cell stack, and an output of the fuel cell stack.