Battery module, battery pack and electric device

The invention discloses a battery module, a battery pack and a power utilization device, the battery module comprises a first bus member and at least two parallel battery cell groups, the first parallel battery cell group at least comprises a first battery cell and a second battery cell, and the second parallel battery cell group at least comprises a third battery cell and a fourth battery cell; wherein the first tab of the first battery cell and the first tab of the second battery cell are stacked and welded to the first side of the first bus piece, and the second tabs of the third battery cell and the fourth battery cell are stacked and welded to the second side of the first bus piece. According to the battery module, two layers of tabs can be welded on the front surface of the first bus piece, and two layers of tabs can be welded on the back surface of the first bus piece, so that the tabs of a plurality of battery cells can be welded on the first bus piece while the battery module is formed by the plurality of battery cells, and the welding space is saved.