Battery module including expansion mitigation unit

The present invention relates to a battery module comprising an expansion mitigating unit, and more particularly, to a battery module comprising a cell stack in which one or more battery cells are stacked and a module case for accommodating the cell stack therein, and having an expansion mitigating unit having a convex portion, the protrusion is capable of applying pressure to at least a portion of an outermost battery cell arranged on an outermost portion of the stack of cells. 本发明涉及包括膨胀减轻单元的电池模块，并且更具体地，涉及一种包括堆叠有一个或更多个电池电芯的电芯堆叠和用于在其中容纳所述电芯堆叠的模块壳体的电池模块，并且该电池模块具有膨胀减轻单元，所述膨胀减轻单元具有凸部，该凸部能够对布置在电芯堆叠的最外侧部分上的最外侧电池电芯的至少部分施压。