COOLING STRUCTURE OF BATTERY PACK, INCLUDING HEAT PIPE

The present invention provides a structure of a battery pack including: a plurality of battery modules arranged in widthwise direction; a pack frame having a side wall and a bottom plate and accommodating the plurality of battery modules;a heat pipe in contact with a lower outer surface of the plurality of battery modules and extending in lengthwise direction; and a cooling channel comprising: a coolant path where a coolant circulates, the coolant path being connected to one lengthwise end of the heat pipe; an inlet where the coolant enters; and an outlet where the coolant exits.