The invention discloses a battery structure formed by the steps of: securing and adhering upper and lower plastic casings; sealing lithium cell raw material using plastic; connecting a contact of the lithium cell raw material to an metal contact of the embedded plastic extrusion contact; and the characteristics thereof are that the upper plastic casing is provided with an explosion-proof ventilator, the cell raw material is sealed by means of plastic, and the explosion-proof ventilator is able to prevent explosions caused by overheating from short circuit and collisions of the battery.