POWER BATTERY AND BATTERY PACK

The present application relates to the technical field of batteries. Disclosed are a power battery and a battery pack. The power battery in the present application comprises a housing, a pressure relief mechanism and an electrode group. When the dimensions of a pressure relief channel are determined, an equivalent sectional area S of the pressure relief channel is calculated on the basis of the dimensions of the housing and the formula S=LHTβ/(L+H)/2, S is made to satisfy S 1