Battery pack

The utility model belongs to the technical field of batteries, and particularly relates to a battery pack which comprises a plurality of batteries and a plurality of connecting pieces, the battery is provided with a positive electrode connecting part and a negative electrode connecting part; the connecting piece comprises a first end and a second end which are oppositely arranged, and the first end is connected with the second end; the first end is welded on the edge of the positive electrode connecting part of one battery and is close to the position of the adjacent battery, and the second end is welded on the edge of the negative electrode connecting part of the adjacent battery and is close to the position of the positive electrode connecting part of the battery; the length of the connecting piece for connecting two adjacent batteries is minimum; and a plurality of batteries are connected in series through the plurality of connecting sheets to form the battery pack. According to the battery pack provided b