Battery module having structure for blocking oxygen inflow during thermal propagation

Abstract

A battery module may include a cell assembly having a plurality of battery cells; a module case provided to accommodate the cell assembly and having an opening on at least one side; and an oxygen inflow blocking cover covering the opening. The oxygen inflow blocking cover may include two or more partition walls each having a vent hole, overlapping each other, provided to cover the opening, and configured such that gas is discharged to the outside of the module case through the vent hole when the gas is generated in the cell assembly; and a hole blocking member positioned between the partition walls and configured to block the vent hole by deforming its shape when heat is applied.

Dependencies are inferred from the claim text.