Patent ID: 11916240
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A secondary battery comprising:
an electrode assembly comprising a plurality of electrode sheets and a separator interposed between first and second of the plurality of electrode sheets;
a pouch-like battery casing configured to receive the electrode assembly;
an electrode lead connected to the electrode assembly and protruding out from the battery casing; and
a lead film covering the electrode lead and interposed between the electrode lead and the battery casing,
wherein the lead film comprises an outer layer covering the electrode lead and an inner layer disposed inside of the outer layer, and
wherein the inner layer comprises a material having a higher air permeability as compared to an air permeability of the outer layer.