Cell mylar film, energy storage device and electric equipment

The invention discloses a battery core mylar film, an energy storage device and electric equipment, the battery core mylar film comprises a bottom surface coating area and a peripheral surface coating area, the bottom surface coating area is used for wrapping the bottom end surface of a naked battery core, the peripheral surface coating area is connected with the bottom surface coating area, and the peripheral surface coating area is used for wrapping the peripheral surface of the naked battery core. An accommodating cavity is formed in the peripheral surface coating area and/or the bottom surface coating area, and is filled with an insulating heat-conducting material. The embodiment of the invention provides a battery core mylar film, an energy storage device and electric equipment, which can improve the heat conduction and heat dissipation capabilities of the battery core mylar film, can timely conduct out heat generated by a naked battery core, and prevents the heat from being accumulated on the periphery