Battery pack

A battery pack comprising:

• a first cooling plate including a first cooling path, along which a refrigerant is circulated, and a first inlet pipe connected to the first cooling path;
• a second cooling plate including a second cooling path, along which a refrigerant is circulated, and a second inlet pipe connected to the second cooling path and sealingly engaged to the first inlet pipe;
• a main supply pipe branching from the first inlet pipe or the second inlet pipe and supplying a refrigerant to the first inlet pipe and the second inlet pipe;
• and
• a pack unit body including at least one battery cell and disposed between the first cooling plate and the second cooling plate;
• a side frame facing the pack unit body;
• and
• a cover member disposed between the first cooling plate or the second cooling plate and the pack unit body to cover the pack unit body,
• wherein the side frame has a first venting hole and a second venting hole connected to the outside, and
• the side frame further includes a partition wall frame including a third venting hole connected to the first venting hole and connected to the side frame such that the third venting hole faces the pack unit body.