Battery pack and vehicle

The utility model relates to a battery pack and a vehicle. The battery pack comprises a lower box body, a partition plate, battery cells, an anti-explosion valve and a heat insulation layer, a cavity is defined by the partition plate and the bottom wall and the side wall of the lower box body, the anti-explosion valve is arranged in the battery cell, and the battery cell is located in the lower box body and communicated with the cavity through the anti-explosion valve; wherein the heat insulation layer is arranged on the partition plate, and a discharge part communicated with the cavity is arranged on the bottom wall of the lower box body, so that gas, discharged into the cavity, of the battery cell is allowed to be discharged through the discharge part. Compared with the prior art, the explosion-proof battery has the advantages that once one battery cell is subjected to thermal runaway, gas in the battery cell can be discharged into the cavity through the explosion-proof valve and then is discharged towards