Battery pack

A battery pack comprising:

• a pack housing structured to enclose battery cells;
• a partition member coupled to the pack housing and partitioning a space of the pack housing into a plurality of accommodation spaces;
• a plurality of pack units respectively disposed in the plurality of accommodation spaces, each pack unit includes one or more battery cells;
• a first pack cover covering at least one of the plurality of accommodation spaces or the plurality of pack units;
• a second pack cover covering the first pack cover and the pack housing;
• and
• one or more heat propagation blocking members are disposed between the plurality of battery cells,
• wherein the first pack cover is in contact with the one or more heat propagation blocking members to isolate the plurality of battery cells from each other in the plurality of pack units, and
• a contact region between the one or more heat propagation blocking members and the first pack cover is positioned between the plurality of battery cells.