Heat preservation device for battery of portable electronic equipment of transformer substation

The utility model relates to a heat preservation device for a battery of portable electronic equipment of a transformer substation, belonging to the technical field of power supply equipment. According to the technical scheme, the heat preservation device is characterized in that an electrothermal film (1) and heat preservation cotton (7) are arranged in a device cloth cover (8), the device cloth cover is arranged in an elastic transparent plastic cover (9), and one outer surface of the device cloth cover is tightly fixed with one inner surface of the elastic transparent plastic cover; and a gap is available between another outer surface of the device cloth cover and another inner surface of the elastic transparent plastic cover, the portable electronic equipment is inserted into the gap, the battery side of the portable electronic equipment is next to the device cloth cover, and the keyboard side or the screen side of the portable electronic equipment is next to the elastic transparent plastic cover. The hea