A battery assembly of an electronic cigarette according to the present application is configured to form an electronic cigarette in combination with an atomizing assembly. The atomizing assembly is provided with a gas storage chamber configured to store cigarette-liquid odor to be detected. The battery assembly includes a sensor group and a microcontroller. After the sensor group detects the cigarette-liquid odor to be detected, the microcontroller is configured to control a circuit between the battery assembly and the atomizing assembly to be switched on in a case that the cigarette-liquid odor to be detected matches the preset odor information, to enable the electronic cigarette to work normally. Thus, the electronic cigarette has an identification function and can be normally used only when the battery assembly and the atomizing assembly of the electronic cigarette are matched.