Abstract: A method for producing a sulfide solid electrolyte having an argyrodite-type crystal structure may involve: mixing a raw material containing elemental phosphorus at an integrated power of 0.5 kWh/kg or more, and heat-treating a precursor obtained in the mixing at 350 to 500° C.

Abstract: An electric power supply control system includes a plurality of electric power supply systems and a controller connected to the electric power supply systems. Each of the electric power supply systems includes a first secondary battery, a first load, a second secondary battery, a second load, and a DC-DC converter connected between the first secondary battery and the first load, and the second secondary battery and the second load. When a charge voltage of the first secondary battery of a first electric power supply system that is any one of the electric power supply systems becomes higher than the charge voltage of the first secondary battery of an electric power supply system other than the first electric power supply system by a predetermined voltage or more, the controller increases a level of output from a specific load in the first electric power supply system.

Abstract: An electric power supply control system includes a plurality of electric power supply systems and a controller connected to the electric power supply systems. Each of the electric power supply systems includes a first secondary battery, a first load, a second secondary battery, a second load, and a DC-DC converter connected between the first secondary battery and the first load, and the second secondary battery and the second load. When a charge voltage of the first secondary battery of a first electric power supply system that is any one of the electric power supply systems becomes higher than the charge voltage of the first secondary battery of an electric power supply system other than the first electric power supply system by a predetermined voltage or more, the controller increases a level of output from a specific load in the first electric power supply system.

Abstract: An electrical power tool may include an electric motor, a speed change device, and a battery pack. The speed change device is capable of changing a reduction ratio thereof and capable of automatically switching between a high speed low torque mode in which a high speed low torque is output and a low speed high torque mode in which a low speed high torque is output, based on an external torque applied to a spindle. A distance from the axis to a center of gravity of the battery pack and a mass of the battery pack are set such that an inertia moment around the axis is greater than a reaction around the axis that is produced when the high speed low torque mode is changed to the low speed high torque mode in the speed change device.

Abstract: An electrical power tool may include an electric motor, a speed change device, and a battery pack. The speed change device is capable of changing a reduction ratio thereof and capable of automatically switching between a high speed low torque mode in which a high speed low torque is output and a low speed high torque mode in which a low speed high torque is output, based on an external torque applied to a spindle. A distance from the axis to a center of gravity of the battery pack and a mass of the battery pack are set such that an inertia moment around the axis is greater than a reaction around the axis that is produced when the high speed low torque mode is changed to the low speed high torque mode in the speed change device.

Abstract: Disclosed are a heat-sealable crosslinked oriented polyethylene film having low-temperature heat sealabilitiy which enables high-speed bag making, improved in antiblocking property and excellent in clarity and moistureproofness, comprising a crosslinked, biaxially oriented high density polyethylene film in which the degree of crosslinking inwardly decreases across the thickness of the film, and a heat sealing layer placed thereon, the heat sealing layer being composed of a tackifier and an ethylene-vinyl acetate copolymer containing an antiblocking agent or composed of 1,2-polybutadiene containing an antiblocking agent, preferably further comprising a heat sealing layer free from an antiblocking agent placed between the biaxially oriented film and the heat sealing layer containing the antiblocking agent, and a process for the production of the same.

Abstract: An oriented polyethylene film with an excellent moistureproofness and optical property is provided in which the degree of crosslinking is uniform or decreases inwardly across the thickness of the film, and which consists of a composition comprising (A) 50 to 90% by weight of polyethylene with a density of at least 0.935 g/cm.sup.3 and a high load melt index to melt index ratio of at most 100 and (B) 50 to 10% by weight of a petroleum resin or linear low density polyethylene.

Abstract: Disclosed are oriented polyethylene films having specific elongation and strength, which are excellent in linear tearability and clear tearability, suitably used for packaging and produced by longitudinally stretching a polyethylene resin sheet in which the degree of crosslinking inwardly decreases across the thickness thereof at a draw ratio of at least 5 times at a temperature of not higher than the melting point of a polyethylene resin forming the polyethylene resin sheet, and laterally stretching said sheet 4 to 8 times at a temperature ranging from above the melting point of the polyethylene resin up to 10.degree. C. higher than the melting point thereof.

Abstract: An oriented polyethylene film with an excellent moistureproofness and optical property is provided in which the degree of crosslinking is uniform or decreases inwardly across the thickness of the film, and which consists of a composition comprising (A) 50 to 90% by weight of polyethylene with a density of at least 0.935 g/cm.sup.3 and a high load melt index to melt index ratio of at most 100 and (B) 50 to 10% by weight of a petroleum resin or linear low density polyethylene.

Abstract: A polyethylene composite film suitable for packaging, which is superior in moistureproofness, flex-o-crack resistance, tearability and heat-sealing property, is provided comprising an oriented polyethylene film such that the degree of cross-linking inwardly decreases across the thickness of the film and at least one lamination layer, provided on one side of the oriented polyethylene film consisting of a lamination material having a heat shrinkage of less than 5% at 120.degree. C.