BATTERY PACK

A battery pack is capable of maximizing or increasing a cooling effect of a module by concurrently performing conduction-type heat dissipation by a heat dissipation member extended from the inside to the outside of the module, and convection-type heat dissipation by a duct and a cooling fan. A battery pack includes: at least one module including a plurality of unit cells, a plurality of spacers between the unit cells, and a module case accommodating the unit cells and the spacers; a plurality of heat dissipation members inserted into the module and extended from the inside to the outside of the module; a duct including an opening and provided at one side of the module; and a cooling fan connected to the opening of the duct.