Battery mounting structure and electric automobile

The utility model belongs to the technical field of electric automobile accessories, and particularly relates to a battery mounting structure and an electric automobile. The battery installation structure comprises a base installed on a rear tail door of the electric automobile, an auxiliary battery pack shell used for installing a battery module and an installation support used for detachably installing the auxiliary battery pack shell on the base. According to the battery installation structure, the auxiliary battery pack shell provided with the battery module is detachably installed on the rear tail door of the electric automobile through the installation support, the installation structure is simple, universality is high, and the battery installation structure can be used for electric automobiles of different types; moreover, the auxiliary battery pack shell is mounted on the rear tail door, so that the design space of other parts in the vehicle is not occupied, the design height of the whole vehicle is n