Battery module and battery pack

A battery module, comprising:

• a case including a front case, a rear case opposing the front case, an upper case, and a lower case opposing the upper case;
• a battery stack including a plurality of battery cells stacking in a first direction, the battery stack is accommodated in the case, and each of the plurality of battery cells includes a first electrode lead protruding in a second direction toward the front case, and a second electrode lead protruding in the second direction toward the rear case, wherein the first and second directions are perpendicular to each other;
• and
• a plurality of flame blocking members, each of the plurality of flame blocking members includes a plurality of exhaust passages connecting an inside and an outside of the case together, and a partition wall part disposed between the plurality of exhaust passages,
• wherein the plurality of flame blocking members is disposed along the first direction on the front case and along the first direction on the rear case and facing the second direction,
• wherein the lower case includes a bottom surface supporting the plurality of battery cells, and side surfaces facing each other in the first direction and covering lateral sides of the battery stack, and
• wherein the each of the plurality of flame blocking members includes a first portion including a sponge having irregular holes constituting at least a first portion of the plurality of exhaust passages, and a second portion including sheet members having a corrugated form, and a second portion of the plurality of exhaust passages are defined by spaces formed between the sheet members, and
• wherein each of the plurality of flame blocking member includes a material having a thermal conductivity of 5 W/mK or more.