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115results about "Hybrid capacitors" patented technology

Method for synthesis of carbon-coated redox materials with controlled size

A method for the synthesis of compounds of the formula C-LixM1-yM'y(XO4)n, where C represents carbon cross-linked with the compound LixM1-yM'y(XO4)n, in which x, y and n are numbers such as 0<=x<=2, 0<=y<=0.6, and 1<=n<=1.5, M is a transition metal or a mixture of transition metals from the first period of the periodic table, M' is an element with fixed valency selected among Mg<2+>, Ca<2+>, Al<3+>, Zn<2+> or a combination of these same elements and X is chosen among S, P and Si, by bringing into equilibrium, in the required proportions, the mixture of precursors, with a gaseous atmosphere, the synthesis taking place by reaction and bringing into equilibrium, in the required proportions, the mixture of the precursors, the procedure comprising at least one pyrolysis step of the carbon source compound in such a way as to obtain a compound in which the electronic conductivity measured on a sample of powder compressed at a pressure of 3750 Kg.cm<-2 >is greater than 10<-8 >S.cm<-1>. The materials obtained have excellent electrical conductivity, as well a very improved chemical activity.
Owner:CENT NAT DE LA RECHERCHE SCI +2

Prelithiated current collector and secondary lithium cells containing same

The present invention provides a battery or supercapacitor current collector which is prelithiated. The prelithiated current collector comprises: (a) an electrically conductive substrate having two opposed primary surfaces, and (b) a mixture layer of carbon (and / or other stabilizing element, such as B, Al, Ga, In, C, Si, Ge, Sn, Pb, As, Sb, Bi, Te, or a combination thereof) and lithium or lithium alloy coated on at least one of the primary surfaces, wherein lithium element is present in an amount of 1% to 99% by weight of the mixture layer. This current collector serves as an effective and safe lithium source for a wide variety of electrochemical energy storage cells, including the rechargeable lithium cell (e.g. lithium-metal, lithium-ion, lithium-sulfur, lithium-air, lithium-graphene, lithium-carbon, and lithium-carbon nanotube cell) and the lithium ion based supercapacitor cell (e.g, symmetric ultracapacitor, asymmetric ultracapacitor, hybrid supercapacitor-battery, or lithium-ion capacitor).
Owner:GLOBAL GRAPHENE GRP INC

Apparatus for energy transfer using converter and method of manufacturing same

According to an aspect of the invention, a motor drive circuit includes a first energy storage device configured to supply electrical energy, a bi-directional DC-to-DC voltage converter coupled to the first energy storage device, a voltage inverter coupled to the bi-directional DC-to-DC voltage converter, and an input device configured to receive electrical energy from an external energy source. The motor drive circuit further includes a coupling system coupled to the input device, to the first energy storage device, and to the bi-directional DC-to-DC voltage converter. The coupling system has a first configuration configured to transfer electrical energy to the first energy storage device via the bi-directional DC-to-DC voltage converter, and has a second configuration configured to transfer electrical energy from the first energy storage device to the voltage inverter via the bi-directional DC-to-DC voltage converter.
Owner:GENERAL ELECTRIC CO

Induction-based aerosol delivery device

An aerosol delivery device is provided that includes a substrate configured to carry an aerosol precursor composition, and a resonant transformer including a transmitter coupling device and a resonant receiver coupling device that is positioned in proximity to the substrate. The aerosol delivery device also includes a pulse width modulation (PWM) inverter configured to drive the resonant transformer. The PWM inverter includes a bridge circuit coupled to the transmitter coupling device, and a PWM controller embodied as an integrated circuit and configured to output a PWM signal to the bridge circuit configured to drive the transmitter coupling device to generate an oscillating magnetic field and induce an alternating voltage in the resonant receiver coupling device when exposed to the oscillating magnetic field. The alternating voltage causes the resonant receiver coupling device to generate heat and thereby vaporize components of the aerosol precursor composition.
Owner:RAI STRATEGIC HLDG INC

Energy storage device, module thereof and electric vehicle using the same

InactiveUS20060124973A1Prevent overchargingExcellent in input/output characteristicHybrid capacitorsElectrolytic capacitorsCharge exchangeComputer module
An object of the present invention is to provide an energy storage device excellent in input / output characteristics at low temperatures, a module thereof and a vehicle using the module. The present invention provides an energy storage device comprising: a positive electrode having a region where a reaction accompanied by charge exchange occurs; a negative electrode having a region where a reaction accompanied by charge exchange occurs; a separator electrically separating the positive and negative electrodes and allowing mobile ions to pass therethrough; an electrolytic solution having an aprotic nonaqueous solvent comprising the mobile ions; and a region in at least one of the positive and negative electrodes where a charge adsorbing / desorbing reaction occurs.
Owner:HITACHI LTD

Li4Ti5O12,Li(4-alpha)ZalphaTi5O12 or Li4ZbetaTi(5-beta)O12 particles processes for obtaining same and use as electrochemical generators

Synthesis process for new particles of Li4Ti5O12, Li(4-α)ZαTi5O12 or Li4ZβTi(5-β)O12, preferably having a spinel structure, wherein β is greater than 0 and less than or equal to 0.5 (preferably having a spinel structure), α representing a number greater than zero and less than or equal to 0.33, Z representing a source of at least one metal, preferably chosen from the group made up of Mg, Nb, Al, Zr, Ni, Co. These particles coated with a layer of carbon notably exhibit electrochemical properties that are particularly interesting as components of anodes and / or cathodes in electrochemical generators.
Owner:HYDRO QUEBEC CORP

Electric power storage system using capacitors and control method thereof

InactiveUS20090134851A1High voltageSignificantly affecting the charging/discharging characteristicsHybrid capacitorsParallel/serial switchingDischarge efficiencyElectricity
In an electric power storage system according to the present invention, in the case of charging, a plurality of capacitors of each circuit block of the electric power storage system are switched to a serial connection to initiate the charging. When the output voltage of power storage means reaches the maximum input voltage of DC-AC conversion means, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. Also up to the time when the maximum input voltage is reached again, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. In the case of discharging, pluralities of capacitors of each circuit block of the electric power storage system are switched to a parallel connection to initiate the discharging. When the output voltage of power storage means reaches the minimum input voltage of DC-AC conversion means, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Also up to the time when the minimum input voltage is reached gain, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Accordingly, the electric power storage system is hardly affected by the capacitance error of the capacitors, and charging / discharging efficiency can be improved.
Owner:LIMITED COMPANY TM

Hybrid powered automobile with controller

This hybrid powered automobile has generators driven by the engine and a battery, and also includes a controller that selects the motive power in compliance with regulations on noise and NOx. The controller of the hybrid powered automobile selects whether the vehicle is to be driven by the electricity of the generators driven by the engine or by the electricity of the battery. When the battery charge level is lower than a specified level, the engine is operated in a range where the engine produces a minimum amount of NOx and the mileage does not deteriorate. When the vehicle is traveling in areas where release of exhaust emissions is permitted, the engine is operated to generate electricity to recharge the battery. The control of switching the motive power between the engine and the battery is performed by receiving a signal transmitted from a traffic light equipment elected on the road.
Owner:ISUZU MOTORS LTD

Hybrid super capacitor and manufacture method thereof

The invention discloses a hybrid super capacitor and a manufacture method thereof, belonging to novel energy storage elements and the technical field of manufacture thereof. A negative active material of the hybrid super capacitor is one or more of polymorphs TiO2-B of nano TiO2 or TiO2, and a positive active material thereof is one or more of carbon nano tube, carbon nano fiber, graphite, conductive carbon black, nickel hydroxide, manganese hydrate or molybdenum hydroxide. The hybrid super capacitor manufactures electrodes by adopting positive and negative active materials, a binder and a conductive agent as raw materials, and assemblies the electrodes into a simulative battery in a glove box so as to manufacture the hybrid super capacitor. The manufacture method provided by the invention has adjustability, simple manufacture process and easy operation, and the assembled hybrid super capacitor has the characteristics of high capacitance, low potential, stable performance, charge and discharge with large current, long cycle life, low cost, easy implementation for mechanized and large-scale production and the like.
Owner:TSINGHUA UNIV

Carbon material and method for producing same

There are provided a cluster of thin sheet graphite crystals or the like which is useful as an electrode material for lithium ion batteries, hybrid capacitors and the like, and a method for efficiently producing the same at high productivity. The method is one for producing a cluster of thin sheet graphite crystals composed of aggregates in such a state that thin sheet graphite crystals extend from the inside toward the outside, comprising charging a powdery and / or particulate material of an organic compound pre-baked to an extent of containing remaining hydrogen in a graphite vessel, and subjecting the powdery and / or particulate material together with the vessel to hot isostatic pressing treatment (HIP treatment) using a compressed gas atmosphere under the predetermined conditions.
Owner:INCUBATION ALLIANCE

Drive device, hybrid vehicle equipped with the drive device, and control method for drive device

A drive device having at least one electric motor that inputs and outputs motive power includes: a plurality of capacitors; a plurality of relays for capacitors that connects and disconnects the motor and the capacitors; and a relay control device that controls the relays for capacitors. The relay control device controls the plurality of relays for capacitors so that during a system start-up, a part of the plurality of relays for capacitors are connected, that is, a partially-on-state is established, after a first predetermined condition is satisfied during the partially-on-state, the part of relays for capacitors are disconnected and a remaining part of the plurality of relays for capacitors are connected, and after a second predetermined condition is satisfied during the remainder-on-state, all the plurality of relays for capacitors are connected.
Owner:TOYOTA JIDOSHA KK

Graphene, graphene-including layer, electrode, and power storage device

Graphene that is formed from graphene oxide and has high conductivity and a method for forming the graphene are provided. A power storage device with high charge discharge capacity and favorable electric properties such as high reliability and high durability and a method for fabricating the power storage device are provided. Chemical reduction and thermal reduction are performed on graphene oxide in this order to form graphene. In the method for fabricating the power storage device including at least a positive electrode, a negative electrode, an electrolytic solution, and a separator, graphene of one or both of a positive electrode and a negative electrode is formed by the forming method of graphene.
Owner:SEMICON ENERGY LAB CO LTD

Electric power storage system using capacitors and control method thereof including serial-parallel switching means for each circuit block of batteries based on descending order of block voltages

InactiveUS7898223B2High voltageSignificantly affecting the charging/discharging characteristicsHybrid capacitorsParallel/serial switchingElectricityDischarge efficiency
In an electric power storage system according to the present invention, in the case of charging, a plurality of capacitors of each circuit block of the electric power storage system are switched to a serial connection to initiate the charging. When the output voltage of power storage means reaches the maximum input voltage of DC-AC conversion means, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. Also up to the time when the maximum input voltage is reached again, each capacitor of a number j of circuit blocks is switched to a parallel connection in order of higher block voltage. In the case of discharging, pluralities of capacitors of each circuit block of the electric power storage system are switched to a parallel connection to initiate the discharging. When the output voltage of power storage means reaches the minimum input voltage of DC-AC conversion means, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Also up to the time when the minimum input voltage is reached gain, each capacitor of a number k of circuit blocks is switched to a serial connection in order of higher block voltage. Accordingly, the electric power storage system is hardly affected by the capacitance error of the capacitors, and charging / discharging efficiency can be improved.
Owner:LIMITED COMPANY TM

Induction-based aerosol delivery device

An aerosol delivery device is provided that includes a substrate configured to carry an aerosol precursor composition, and a resonant transformer including a transmitter coupling device and a resonant receiver coupling device that is positioned in proximity to the substrate. The aerosol delivery device also includes a pulse width modulation (PWM) inverter configured to drive the resonant transformer. The PWM inverter includes a bridge circuit coupled to the transmitter coupling device, and a PWM controller embodied as an integrated circuit and configured to output a PWM signal to the bridge circuit configured to drive the transmitter coupling device to generate an oscillating magnetic field and induce an alternating voltage in the resonant receiver coupling device when exposed to the oscillating magnetic field. The alternating voltage causes the resonant receiver coupling device to generate heat and thereby vaporize components of the aerosol precursor composition.
Owner:RAI STRATEGIC HLDG INC

Integrated DC/DC convertor and electrochemical energy storage system

ActiveCN104158397ALow costFlexible adjustment of output characteristicsFuel cells groupingHybrid capacitorsFrequency spectrumThermal energy storage
The invention relates to an integrated DC / DC convertor, which comprises a first DC / DC convertor, a second DC / DC convertor, a first voltage transducer, a second voltage transducer, a first electric current transducer, a second electric current transducer, a third electric current transducer and a controller, wherein the first DC / DC convertor is in parallel connection with the second DC / DC convertor; on / off of the second DC / DC convertor is controlled by the controller; the electrochemical alternating current impedance frequency spectrum of the electrochemical energy storage system is obtained through that the second DC / DC convertor in the open state is controlled to regulate and control the electric current of the output end of the electrochemical energy storing device in a current disturbance manner.
Owner:TSINGHUA UNIV

Energy pack

ActiveCN103000954ALossless retention of energy storage propertiesSimple structureHybrid capacitorsFinal product manufactureElectricitySelf-energy
The invention provides an energy pack. The energy pack comprises a positive electrode and a negative electrode separated by electrolyte, and also comprises a piezoelectric ion transmission layer positioned between the positive electrode and the negative electrode, wherein the piezoelectric ion transmission layer generates a piezoelectric field pointing from the positive electrode to the negative electrode under the action of mechanical force. According to the energy pack, a piezoelectric ion transmission layer material is introduced between the positive electrode and the negative electrode to replace inherent units of device construction of a cell or a super-capacitor. Therefore, the energy storage characteristics of the existing electrochemical system is nondestructively kept, and ions in the electrolyte are driven to migrate by piezoelectric potential generated by the piezoelectric material under the mechanical action, thereby causing nonuniform redistribution of ion concentration to trigger the charging process. Accordingly, the energy pack provided by the invention has a function of self energy charging.
Owner:BEIJING INST OF NANOENERGY & NANOSYST

Solid electrolyte capacitor and a method for manufacturing the same

There is provided an electrolyte capacitor, which has a low ESR, and is superior in the heat resistance and reliable under a hot condition. The electrolyte capacitors in constructed by including a conductive polymer and a conductive auxiliary liquid having a lower conductivity than usual electrolyte, having a structure below. The conductive auxiliary liquid includes a high boiling point organic solvent having a boiling point of 150° C. or more, and an aromatic compound having at least one hydroxyl group. The aromatic compounds preferably includes an aromatic compound having at least one carboxyl group or an aromatic compound having at least one nitro group, or a combination of an aromatic compound having at least one carboxyl group with an aromatic compound having at least one nitro group.
Owner:TAYCA CORP

Charge-discharge device with equalization function using both convertor and multi-stage voltage doubler rectifier circuit

The disclosure describes a charge device capable of charging electricity storage cells while eliminating a voltage variation among the electricity storage cells without a need for at least a circuit section playing a role in voltage equalization among the electricity storage cells to be designed to have a large current capacity, and describes a charge-discharge device constructed by additionally equipping a discharging function with the charge device. Provided are a charge device and a charge-discharge device each of which comprises a convertor, an input circuit, and a multi-stage voltage doubler rectifier circuit. An element in the convertor configured to be applied with a rectangular waveform voltage is connected to the multi-stage voltage doubler rectifier circuit via the input circuit to thereby realize a voltage equalization function, and an output section of the convertor is connected to the multi-stage voltage doubler rectifier circuit to thereby realize a charging-discharging function.
Owner:JAPAN AEROSPACE EXPLORATION AGENCY

Mechanical preparation method of aromatic polyimide porous material

The invention relates to a mechanical preparation method of an aromatic polyimide porous material. The method comprises the following steps: placing two monomers of benzenetricarboxaldehyde and aromatic diamine in a mortar; dropwise adding dimethylformamide and an acetic acid solution; grinding at the room temperature for 1 to 4 hours; then washing and drying to obtain the porous material. By adopting a mechanical synthesis method, a dehydration condensation reaction is carried out between an aldehyde group and an amine group to produce the aromatic polyimide porous material; the aromatic polyimide porous material has application potentials on the aspects of gas storage and separation, supercapacitors, catalyst carriers and sensors.
Owner:DONGHUA UNIV

Method and machine for manufacturing energy accumulating components, and components made thereby

A method for manufacturing electrical components of the energy-accumulating electrostatic or electrochemical type, consisting in winding at least two layers of a film on a support made of an electrically nonconducting material that has a substantially polygonal cross-section, by providing a preset number of film turns until a predefined thickness is reached, and forming a first layer; arranging respective spacers at the corners of the polygon in which the contour of the wound film is inscribed; and winding more turns of film around the first layer and around the spacers inserted at the corners, to form a second layer. A machine by means of which the method is performed comprises a rotatingly mounted frame on which the support is fixed for winding of the layer of film.
Owner:KEMET ELECTRONICS CORP

Circuit arrangement for limitation of over-voltages in energy storage modules

A circuit for the limitation of over-voltages in energy storage modules having a series circuit of energy storage elements connected between a first potential and a second potential includes voltage-limiting elements associated with combinations of the energy storage elements. Where “M” is the maximum number of directly interconnected energy storage elements of a predetermined combination, wherein for M≧2 a voltage-limiting element is connected in parallel with each combination and a respective voltage-limiting element is connected in parallel with a first energy storage element connected to the first potential and with an nth energy storage element connected to the second potential. For M>2 a respective voltage-limiting element is connected in parallel with each sub-combination of at least two directly interconnected energy storage elements of the combination having an energy storage element connected to the first potential or to the second potential.
Owner:INVENTIO AG

Charger-discharger with equalization function using both convertor and multi-stage voltage doubler rectifier circuit

The present invention addresses the problem of providing a charger which is capable of performing charging while eliminating variations in the voltages of storage cells and which does not require that at least the circuit part responsible for equalization of the voltages of the storage cells be designed to have a large current capacity, the present invention also addressing the problem of providing a charger-discharger further equipped with a discharging function in such a charger. Provided are a charger and a charger-discharger, comprising a convertor, an input circuit, and a multi-stage voltage doubler rectifier circuit. A voltage equalization function is implemented by connecting an element in the convertor to which a rectangular wave voltage is applied to the multi-stage voltage doubler rectifier circuit via an input circuit, and a charging-discharging function is implemented by connecting the output of the convertor to the multi-stage voltage doubler rectifier circuit.
Owner:JAPAN AEROSPACE EXPLORATION AGENCY
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