BATTERY MODULE, BATTERY PACK, AND VEHICLE

The application relates to a battery module, a battery pack and a vehicle. The battery module includes: secondary batteries, in which two or more secondary batteries are arranged side by side in an arrangement direction; a busbar arranged on a top of the secondary batteries and electrically connected to at least two of the secondary batteries; a sampling assembly including a sampling circuit board arranged on the top of the secondary batteries and a sampling leg extending from the sampling circuit board toward the busbar, the sampling leg and the busbar being welded to form a welded zone; a connector, the sampling leg and the busbar being connected by the connector, the connector being located at a side of the welded zone close to the sampling circuit board. The sampling leg and the busbar included in the battery module of the application are connected and fixed by the welded zone, and a connection structure is formed at the side of the welded zone by the connector. The connection structure can decompose a tensile force, which is beneficial to reduce the tensile force borne by the welded zone and reduce the possibility of tearing or breaking of the sampling leg in the welded zone.