Abstract: In a nonaqueous electrolyte secondary battery a separator includes a porous substrate, a first filler layer, and a second filler layer. The first filler layer comprises phosphate particles having a BET specific surface area of 5 to 100 m2/g and polyvinylidene fluoride and is formed on a first surface that faces the positive electrode side of the substrate and contacts the positive electrode. The second filler comprises inorganic particles which have a melting point higher than that of the phosphate particles and is formed on at least one of a second surface that faces the negative electrode side of the substrate and the area between the substrate and the first filler layer. The content of the polyvinylidene fluoride in the first filler layer is 10 to 50 mass % and is higher in a region on the positive electrode side than in a region on the substrate side.

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The separator has a multilayer structure in which a first filler layer containing phosphate particles, a porous resin substrate, and a second filler layer containing inorganic particles having higher heat resistance than the phosphate particles are stacked in this order from the negative electrode side. The first filler layer is disposed on the porous resin substrate in such a manner that the surface of the first filler layer faces the surface of the negative electrode. The phosphate particles have a BET specific surface area in the range of 5 m2/g or more and 100 m2/g or less.

Abstract: A magnetic-coupling multivibrator has a rectification circuit including first and second smoothing capacitors connected at a capacitor common junction, the first smoothing capacitor providing a high potential output, the second smoothing capacitor providing a low potential output. A switching series circuit has first and second switching elements connected in series at a common switching junction, the switching series circuit being connected in parallel to the smoothing capacitors. A first saturable transformer has a first saturation coil, a first control coil and a first gate drive coil, and a second saturable transformer has a second saturation coil, a second control coil and a second gate drive coil.

Abstract: A battery charger converter circuit is disclosed in which a half-bridge rectifier circuit formed from two diodes, a half-bridge circuit formed from two switching elements, and a series circuit formed from two capacitors are connected at either end, respectively, thereof in parallel to each other, a boosting reactor being provided at the AC side of the half-bridge rectifier circuit; a primary circuit of the converter, including a primary coil of a high-frequency transformer, connected between a common point of connection between the switching elements and a common point of connection between the two capacitors, and a control circuit for the two switching elements; and a secondary circuit of the converter, including the secondary coil of the high-frequency transformer, a full-bridge rectifier circuit connected in parallel to the secondary coil and a smoothing capacitor; a high-frequency power generated by the primary circuit of the converter being rectified by the secondary circuit and charged into cells.

Abstract: A switching power circuit for battery charger, comprising a single-phase full-wave rectifier circuit formed of diodes, a half bridge circuit formed of first and second switching elements connected in series to each other via a diode; a reactor provided between the single-phase full-wave rectifier circuit and the half bridge circuit of the switching elements and having a secondary coil, a series circuit formed of two diodes connected in parallel across the half bridge circuit, a high-frequency transformer having a primary coil connected between the source terminal of the second switching element in the half bridge circuit and the common junction of the two capacitors in the two-capacitors series circuit a secondary coil at which a high-frequency power is delivered to a load forming a battery charger, and a control circuit consisting of a variable frequency multivibrator to turn on and off the first and second switching elements alternately.

Abstract: The apparatus for non-contacting feeding of a high frequency power according to the present invention comprises a double voltage full-wave rectifier circuit which converts an AC input into a DC output, Royer oscillation circuit consisting of FETs and which receives the DC output from the voltage double full-wave rectifier circuit and provides a high frequency oscillation, the gate windings ofhe FETs being the second winding of a saturable circuit, a starting gate bias stabilization circuit for the Royer oscillation circuit, and a main transformer which delivers a high frequency power produced in the Royer oscillation circuit, through the primary winding of the oscillation-use saturable transformer.