System for measuring shutdown temperature and meltdown temperature of separator

A system for determining shut-down temperature and melt-down temperature of a separator, comprising:

• an air permeability-determining unit determining air permeability (Gurley value) of the separator;
• a first jig arranged on one side of the separator and having a first through-hole through which air discharged from the air permeability-determining unit is introduced;
• a second jig arranged on other side of the separator which is an opposite surface of the one side of the separator, and having a second through-hole through which air passing through the first through-hole and pores in the separator is introduced;
• a heating unit heating the first jig and the second jig;
• a temperature sensor measuring temperature of the first jig or the second jig;
• and
• a controlling unit controlling the heating unit and the temperature sensor,
• wherein the controlling unit calculates the shut-down temperature and the melt-down temperature of the separator by using the temperature measured by the temperature sensor as a function of time and the air permeability (Gurley value) of the separator determined by the air permeability-determining unit,
• the heating unit is included in the first jig and the second jig,
• the heating unit comprises a hot wire, and
• the hot wire is installed on the other surface where the first jig or the second jig is in contact with the separator.