Battery module

A battery module, comprising:

• a plurality of batteries, arranged sequentially along a thickness direction of the battery module;
• side plates, disposed on two opposite ends of the plurality of batteries in a width direction of the battery module;
• and
• a composite pad, disposed between two corresponding adjacent batteries along the thickness direction, wherein the composite pad comprises a cushion material sheet and a connecting strip disposed around the cushion material sheet, and a first bulge is disposed on the connecting strip;
• wherein a first via hole is disposed on each side plate, and the first via hole corresponds to the first bulge;
• and
• the first bulge is inserted into the first via hole so that the connecting strip is fixedly connected to the side plate;
• and wherein
• the composite pad further comprises an overlay film layer, laid on two sides of the cushion material sheet and the connecting strip in the thickness direction, and configured to connect the cushion material sheet and the connecting strip together and expose the first bulge.