Battery module and battery

The utility model relates to a battery module and a battery, and the battery module comprises a box body provided with an accommodating cavity; the battery monomer group comprises a plurality of battery monomers stacked in the accommodating cavity, and each battery monomer comprises a shell, a pole and at least one pressure release valve arranged on the shell; the accommodating part is arranged on at least one of the side walls of the two shells parallel to the stacking direction of the battery monomers and the bottom walls of the shells, the accommodating part is provided with an accommodating space, the highest point of the accommodating space is lower than the height of the side walls, and the pressure release valve is communicated with the accommodating space. And when the internal pressure or temperature of the battery is released through the pressure release valve, the influence of the brought-out electrolyte on the circuit board and other batteries can be prevented. 本实用新型涉及一种电池模组及电池，其中电池模组包括：箱体，具有容纳腔；电