Battery module and vehicle

The invention discloses a battery module and a vehicle. The battery module comprises a plurality of battery cells, a first material layer and a second material layer; the plurality of battery cells are sequentially arranged along a first direction, and each battery cell comprises a negative plate, a diaphragm and a positive plate which are sequentially stacked along the first direction; the first material layer and the second material layer are arranged between two adjacent battery cells, the first material layer is located at the edge of the battery cell, and the second material layer covers the central position of the battery cell; the hardness of the first material layer is greater than that of the second material layer. According to the battery module provided by the invention, the first material layer and the second material layer which are different in hardness are arranged between the battery cells, so that the lithium precipitation phenomenon of the pole piece can be avoided in a charge-discharge cycle state, and the capacity retention ratio of the battery module is improved.