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|1. (WO2013157722) SECONDARY BATTERY, SECONDARY BATTERY COMPONENT, AND METHOD FOR MANUFACTURING SECONDARY BATTERY|
|Applicants:||LG CHEM, LTD.
|Title:||SECONDARY BATTERY, SECONDARY BATTERY COMPONENT, AND METHOD FOR MANUFACTURING SECONDARY BATTERY|
The secondary battery according to the present invention comprises: an electrode assembly including an electrode tab; an electrode lead attached to the electrode tab and including at least one lead hole; a pouch case accommodating the electrode assembly in such a manner that the electrode lead is withdrawn to the outside; and a venting pattern portion formed in an area corresponding to the lead hole, and sealing tape provided in such a manner as to be interposed between the electrode lead and the inner surface of the pouch case. According to the present invention, the sealing state of the pouch case is swiftly released in the event that gas is generated in the pouch case due to an abnormality such as excess current flowing through the secondary battery caused by abnormal operation of a protective circuit, and thus the secondary battery can be used safely.