Patent application number | Description | Published |
20080218176 | Power Supply Device - A power supply device has a capacitor unit in which capacitors are interconnected in series, a charging unit for charging the capacitor unit at a constant current, a detecting unit for detecting voltage on the high potential side of each of the capacitors, a determining unit for determining the existence of an abnormality based on the voltage detected by the detecting unit. The determining unit determines the abnormality when the difference between respective voltages on the high potential sides of some adjacent capacitors exceeds upper-limit voltage value Va, when the difference is lower than lower-limit voltage value Vb, or when a voltage is negative. | 09-11-2008 |
20090009145 | CHARGING APPARATUS - A charging apparatus suppresses rise in temperature of an internal chip of a charging element. The output signal obtained from a current detecting portion for detecting charging current to a capacitor and from a voltage detecting portion for detecting a difference between a voltage (VC) of capacitor and a voltage corresponding to DC power supply is integrated by integrator. The charging is carried out by controlling power of a charging element to a predetermined value using an output signal of the integrator and at a time near the completion of the charging, the charging element is controlled by constant-voltage-control-circuit so as to charge the capacitor up to a predetermined voltage. Consequently, the maximum temperature inside the charging element is reduced, thereby providing a charging apparatus with high reliability. | 01-08-2009 |
20090033294 | VEHICLE SOURCE DEVICE - A vehicle source device capable of performing a more accurate temperature-rise corresponding to the ability of the capacitor is provided. The correlation of the temperature and the internal resistance corresponding to the ability of the current capacitor in time of activation is obtained in advance, the internal resistance is obtained for every repetition of charge/discharge, and the temperature of the inside of the capacitor is obtained from the correlation. Since the accurate temperature of the inside of the capacitor is obtained, the capacitor is accurately temperature-raised to the target temperature. | 02-05-2009 |
20090059470 | CAPACITOR UNIT, AND ITS MANUFACTURING METHOD - According to the configuration and the manufacturing method of forming a moisture proof agent on both surfaces of a circuit substrate after soldering a capacitor connection pin in a vertical direction to the circuit substrate, and electrically connecting the capacitor so as to be in a perpendicular direction to the length direction of the capacitor connection pin at the upper space of the circuit substrate, the possibility of the moisture proof agent attaching to the capacitor is eliminated, the productivity enhances since the moisture proof agent can be easily formed on both surfaces of the circuit substrate, and a capacitor unit of miniaturized and low height configuration is realized since the capacitor is mounted in the horizontal direction in the upper space with respect to the circuit substrate. | 03-05-2009 |
20090072791 | Electric Storage Device - Electric storage device is provided which is capable of smoothly charging storage elements and reliably detecting an overvoltage of each of the storage elements. Electric storage device includes charging/discharging limiting circuit. Charging/discharging limiting circuit includes charge element, discharge element, control unit, charging current detection unit, voltage detection unit, valuable reference voltage source, and voltage comparison unit. A magnitude of valuable reference voltage source that is connected to an input terminal on a first side of voltage comparison unit is adjusted by charging current detection unit. Detection signal from the voltage detection unit is given to an input terminal on a second side of voltage comparison unit. | 03-19-2009 |
20090088993 | VEHICLE POWER SUPPLY DEVICE AND ITS DEGRADATION JUDGMENT METHOD - A vehicle power supply device has a capacitor unit including capacitors storing auxiliary power; a temperature sensor; a charge circuit; a capacitor-unit current detector; a capacitor-unit voltage detector; a controller; a storage; and a determination unit. The determination unit determines the degradation level of the capacitor unit based on at least one of an internal resistance standard value and a corrected calculated value of capacitance. This structure determines degradation of the vehicle power supply device more accurately than ever, so that the device can be used until the end of the actual life. | 04-02-2009 |
20090167575 | Analog-To-Digital Converting Apparatus And Vehicle Power Supply Apparatus Using The Same - The A/D conversion apparatus and the vehicle power-supply device using the apparatus calculate errors at a plurality of reference voltages and reference errors prior to error correction. Each reference error is applied to a digital-output range that is divided by digital output corresponding to the reference voltages. In the calculation, when the errors obtained at adjacent reference voltages have same signs, the reference error is determined as an average of the errors obtained at adjacent reference voltages; on the other hand, when the errors obtained at adjacent reference voltages have different signs, the reference error is determined to be zero. The apparatus provides a corrected digital output by subtracting the reference error—which is applied to the digital-output range including the digital output—from the digital output corresponding to analog input voltage. | 07-02-2009 |
20090261782 | ELECTRICITY STORAGE DEVICE - An electric storage device is disclosed, this device can balance voltages across each one of energy storage devices with each other in a short time even if the voltages disperse in a wide range, and also it can reduce needless power consumption. This device includes the energy storage devices and an equalizing voltage circuit coupled in parallel with the energy storage devices. The equalizing voltage circuit includes a balancing resistor, a balancing switch coupled between respective energy storage devices and respective balancing resistors, a discharging resistor coupled in parallel with the respective energy storage devices and having a smaller resistance value than the balancing resistor, and a discharging switch coupled between the respective energy storage devices and the respective discharging resistors. All the balancing switches and all the discharging switches are turned on during the charge to the energy storage devices, and after the voltages across the respective energy storage devices can be balanced with each other, all the discharging switches alone are turned off. | 10-22-2009 |
20100007213 | ACCUMULATOR - DC blocking capacitor and resistor are coupled in series with electricity storing section at its both ends, and ON/OFF circuit is coupled in parallel with resistor. Peak voltage holding circuit is coupled in parallel with ON/OFF circuit, and current sensing section is coupled in series with storing section, and an output from current sensing section is supplied to peak current holding circuit. In the structure of the storage device discussed above, a flowing direction of an electric current from a positive electrode to a negative electrode of storing section is referred to as a positive direction. ON/OFF circuit is controlled such that circuit is turned on when the current flows in a negative direction, and such that it is turned off when the current flows in the positive direction. An internal resistor of storing section can be found based on a peak voltage resulting from the control and held by circuit and a peak current resulting from the control and held by circuit. A degree of degradation of electricity storing section is determined with this internal resistor. | 01-14-2010 |
20100308659 | POWER SUPPLY DEVICE - A power supply device is used for an apparatus which includes a power generator and a parallel assembly including a main power supply and a load. The power supply device includes a input port connected to an output terminal of the power generator, an output port connected to the parallel assembly, an electric storage element charged with electric power generated by the power generator, a switching unit, a current switcher for restricting a current flowing from the main power supply to the electric storage element, a controller for controlling the power generator such that the voltage of the output port becomes a predetermined voltage. The switching unit is connected to the first input port, the output port, and the electric storage element. The switching unit connects the electric storage element, the power generator, and the parallel assembly in parallel to each other when the electric storage element is charged with the electric power generated by the power generator. The switching unit connects the electric storage element, the power generator, and the parallel assembly in series to each other when the electric storage element is discharged to supply electric power stored in the electric storage element to the parallel assembly. This power supply device can provide an apparatus including only one power generator with a regenerating function. | 12-09-2010 |
20110115427 | ENERGY STORAGE DEVICE - In an energy storage device, a charging circuit is electrically coupled to the energy storage section. A first comparator is electrically coupled to an energy storage section, and its output is inverted when voltage Vc of the energy storage section reaches first predetermined voltage Vc | 05-19-2011 |
20120025613 | ELECTRIC POWER SUPPLY DEVICE - A power supply device includes an electric storage unit connected to a main power supply and a load via a charging circuit; and a control circuit connected to the main power supply, the charging circuit, a voltage detection circuit, and a current detection circuit. When the electric storage unit is charged up to a steady-state voltage Vcs of the electric storage unit, the control circuit controls the electric storage unit to be charged until the voltage Vc of the electric storage unit reaches a voltage for determining the property deterioration of the electric storage unit. During the charge process, the control circuit calculates at least one of the internal resistances and the capacitance of the electric storage unit from the variation width ΔVcr of the voltage Vc, the current Ic of the electric storage unit, the variation width ΔVct per unit time of the voltage Vc, and the current-time product ∫(Ic)dt of the electric storage unit. One of these values is used to determine the property deterioration of the electric storage unit. | 02-02-2012 |
20130105210 | CAPACITOR MODULE | 05-02-2013 |
20130154579 | CAPACITOR DEVICE - A capacitor device includes a capacitor unit, a voltage-dividing circuit for outputting a divided voltage obtained by dividing a voltage of the capacitor unit, and a comparator circuit. The comparator circuit causes the charge circuit to operate such that the voltage of the capacitor unit reaches a full-charge voltage. The voltage-dividing circuit includes a semiconductor switching element, and outputs a divided voltage. A control circuit is operable to determine the full-charge voltage to be a high-temperature full-charge voltage by turning off the first semiconductor switching element when a temperature at the capacitor unit exceeds a reference temperature. The control circuit is operable to determine the full-charge voltage to be a low-temperature full-charge voltage that is higher than the high-temperature full-charge voltage by turning on the first semiconductor switching element when the detected temperature is not higher than the reference temperature. | 06-20-2013 |