BATTERY ASSEMBLY

The present disclosure relates to a battery assembly comprising: a plurality of battery groups including battery cells; a receiving case configured to accommodate the plurality of battery groups; a support portion disposed inside the receiving case with any one of the plurality of battery groups interposed therebetween; and a busbar portion supported by the support portion inside the receiving case and configured to electrically connect battery cells of the any one of the battery groups or electrically connect between the plurality of battery groups.