BATTERY PACK

Embodiments provide a battery pack. The battery pack includes: a pack housing including a base plate and side walls; a plurality of battery cell assemblies provided on the base plate and each including a plurality of battery cells and an integrated circuit assembly that is coupled to the plurality of battery cells and includes a first antenna; a battery management system (BMS) including a second antenna; and a lid coupled to the side walls, in which the lid includes a waveguide overlapping the first antenna of each of the plurality of battery cell assemblies and the second antenna and further includes a base part and an ascending part farther spaced apart from the base plate than the base part, and the waveguide is on the ascending part.