BATTERY PACK AND BATTERY SYSTEM

According to one embodiment, a battery pack includes a battery module, a frame and a sheet member. The battery module includes a plurality of batteries, and includes a module bottom surface. The frame and the sheet member have electrical insulating property, and a frame sidewall of the frame forms a storage space of the battery module. A frame protrusion portion protrudes from the frame sidewall to the inner peripheral side and supports the battery module from a side toward which the module bottom surface faces. The frame forms a through-hole having a protrusion end of the frame protrusion portion as at least a part of an edge. The sheet member is in close contact with the module bottom surface of the battery module.