Pouch type battery cell and battery pack including the same

A battery pack comprising:

• a battery cell assembly formed by stacking a plurality of battery cells each comprising an electrode tab lead portion and a heat exchange portion;
• a battery pack housing in which a plurality of battery cell assemblies are seated and which comprises a bottom portion and a sidewall portion;
• and
• a heat conduction member disposed on above the bottom portion of the battery pack housing,
• wherein at least one center beam formed across a housing space is formed inside the battery pack housing,
• wherein the electrode tab lead portion further includes a corner portion at one end thereof, and the corner portion protrudes more toward the bottom portion than the heat exchange portion,
• wherein the battery cell assembly includes a bus bar assembly including a metal bus bar coupled to the electrode tab lead portion and an insulator supporting the metal bus bar, and a lower portion of the insulator extends between the corner portion and the bottom portion,
• wherein the electrode tab lead portion comprises a sealed surface formed by thermally compressing a pouch accommodating an electrode assembly, and
• the heat exchange portion is in contact with the heat conduction member without the sealed surface,
• wherein the corner portion of each of the plurality of battery cells of the battery cell assembly is prevented from directly contacting the bottom portion of the battery pack housing by the lower portion of the insulator extending between the corner portion of each battery cell and the bottom portion of the battery pack housing, and
• wherein the bottom portion of the battery pack housing comprises a step portion for accommodating the corner portion formed to protrude more toward the bottom portion than the heat exchange portion, and
• wherein the heat exchange portion of each of the plurality of battery cells of the battery cell assembly is configured to be exposed downwardly, and is configured to be in direct contact with the heat conduction member disposed on the bottom portion of the battery pack housing so as to be in close contact with each other.