Battery pack

A battery pack comprising:

• a plurality of battery stacks provided such that the battery stacks are placed at intervals in an arrangement direction;
• a battery outer case in which the battery stacks are accommodated;
• a cooler placed on a bottom face of the battery outer case;
• and
• a buffer member, wherein:
• the cooler includes a plurality of cooling modules provided such that the cooling modules are placed at intervals in the arrangement direction;
• and
• a connecting portion configured to connect adjacent cooling modules in the arrangement direction to each other;
• in each of the cooling modules, a refrigerant passage through which refrigerant flows is formed, the connecting portion fluidly separated from the refrigerant passage in each of the cooling modules;
• the buffer member is placed between the connecting portion and a protection plate placed below the cooler;
• a vulnerable portion is formed in a part of the connecting portion, the part being where the buffer member is placed;
• and
• the vulnerable portion is a mark-off line.