NOVELTY - The battery has an electrolyte including kasolite electrolytic solution, and positive and negative electrodes (21,22) containing sulfur and lithium respectively. The sulfur comprises a non porous conducting aid. A conductive interlayer (23) is provided between sulfur and Lithium, and includes a conductive fiber containing layer, and a carbon nanotube layer, or a conductive mesh that comprises metal. The conductive fiber comprises conductive non woven fabric, carbon, metals, and conductive polymers.    USE - Battery of battery pack used in electronic device such as laptop personal computer, tablet computer, cellular phone e.g. smartphones, personal digital assistant, imaging devices such as digital still camera, digital video camera, audio equipment such as portable audio player, game machine, cordless phone handset, electronic book, electronic dictionary, radio, headphone, navigation system, memory card, pacemaker, hearing aid, electrical tool, electrical shaver, refrigerator, air conditioner, TV, stereo, water heater, microwave, dishwasher, washing machine, dryer, lighting equipment, toy, medical device, robot, road conditioner, and traffic lights, electric vehicle such as electric car, electric motorcycle, electric bicycle, rail vehicle, hybrid car, electric storage device and electric power system (all claimed) such as home energy management system (HEMS), and smart grid.    ADVANTAGE - Based on information from the sensors, meteorological conditions, human conditions are grasped to make it possible to automatically control the power consumption equipment, by minimizing energy consumption. Since sulfur or lithium sulfide dissolved in the electrolytic solution in the positive electrode active material layer can migrate to the conductive interlayer without being trapped by the conducting aid, the positive electrode reaction is made to proceed to improve the positive electrode utilization. The films have excellent effect of short circuit prevention, and can make an improvement in battery safety due to the effect of shutdown.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a battery pack;    (2) an electronic device;    (3) an electric vehicle;    (4) an electric storage device; and    (5) an electric power system.    DESCRIPTION OF DRAWING(S) - The drawing shows the cross-sectional view representing an enlarged portion of the rolled electrode case of the secondary battery.    Electrode case (20)    Positive electrode (21)    Negative electrode (22)    Conductive interlayer (23)    Separator (24)