EXTERIOR CASE FOR LITHIUM SECONDARY BATTERY, INSPECTION METHOD OF EXTERIOR CASE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY

An exterior case for a lithium secondary battery according to an embodiment of the present disclosure includes: an outer layer including one or more of a polyester-based resin and a polyamide-based resin; an inner layer including a polyolefin-based resin, and including a first inner layer, a second inner layer, and a third inner layer; and a barrier layer disposed between the outer layer and the inner layer. The first inner layer is disposed between the barrier layer and the second inner layer. The second inner layer is disposed between the first inner layer and the third inner layer and has a different crystal structure from the first inner layer and the third inner layer. An onset temperature of the third inner layer is 100° C. or higher.