The invention relates to a battery of an electric automobile. The battery comprises a plurality of battery units, an external contour frame and an induction signal device, wherein the battery units are arranged in the external contour frame in a stacking way; the induction signal device is arranged on the external contour frame in a pattern form and is used for providing a metal material communication line of a film for the external contour frame; the two sides of the induction signal device are respectively connected with poles of the battery units and a terminal. According to the battery provided by the invention, induction signals can be smoothly transmitted by using the induction signal device.