Apparatus, method, and system for measuring thermal conductivity of secondary battery using detachable jig

A method of measuring thermal conductivity of a secondary battery using a detachable jig to measure thermal conductivities of respective surfaces of the secondary battery, the method comprising:

• placing the secondary battery in a thermal conductivity measurement apparatus;
• inducing thermal runaway by attaching a heat source to a specific surface of the secondary battery;
• and
• comparing temperatures before and after the thermal runaway by using a thermal measurement unit on another surface of the secondary battery.

A system for measuring thermal conductivity of a secondary battery using a detachable jig to evaluate the thermal conductivity of the secondary battery under a thermal runaway condition, the system comprising:

• a plurality of independent thermal conduction blocks corresponding to respective surfaces of the secondary battery;
• a heat source provided on at least one of the plurality of independent thermal conduction blocks, the heat source being configured to induce thermal runaway;
• a thermal measurement unit located outside the plurality of independent thermal conduction blocks, the thermal measurement unit being configured to collect thermal data;
• and
• a controller configured to calculate thermal conductivity of each of the surfaces of the secondary battery based on the thermal data,
• wherein the system is configured to quantitatively evaluate an independent thermal conductivity for each of the surfaces of the secondary battery.