A pouch-type battery case with a hidden gas pocket, a pouch-type secondary battery equipped with this, and a battery module containing the pouch-type secondary battery.

摘要

A pouch-type battery case having a hidden gas pocket portion and a pouch-type secondary battery including the same according to the present invention have at least a part of the pouch-type case folded and collect gas when gas is generated inside. By configuring the gas pocket that forms the space to be used, it is possible to reduce the extent to which the battery swells when gas is generated, and it does not occupy the space under normal conditions, but it expands only when gas is generated This has the effect of forming a space and improving the space utilization efficiency of the battery.