39results about How to "Increase battery voltage" patented technology

The battery pack charging method charges a battery pack, which is a plurality of lithium ion rechargeable batteries connected in series, to full charge by constant current and constant voltage charging. Constant current charging is performed until total voltage reaches a prescribed total voltage. Subsequently, constant current charging is switched to constant voltage charging until full charge is reached. In addition, the voltage of each battery being charged is detected. When the voltage of any battery exceeds a first specified voltage, charging is switched to pulse charging.

A power storage device with reduced initial irreversible capacity is provided. The power storage device includes a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode active material and a water-soluble polymer. The electrolyte solution includes an ionic liquid. The ionic liquid includes a cation and a monovalent amide anion.

The invention discloses an inductor-capacitor quasi-resonance-based equalization circuit. The equalization circuit comprises a battery pack and an inductor-capacitor quasi-resonance unit and also comprises a gating switch network and a master controller, wherein the gating switch network is connected with a battery pack and the inductor-capacitor quasi-resonance unit; and during the equalization process, the master controller controls the gating switch network and the inductor-capacitor quasi-resonance unit so that the inductor-capacitor quasi-resonance unit is switched in states of charging, discharge and resonance in a circulation way, and a battery with highest energy transfers the energy to a battery with lowest energy through an inductor-capacitor. By the equalization circuit, zero-current switching of a switch can be achieved, zero-voltage differential equalization among batteries is achieved, and the technical effect of higher speed than that of an existing quasi-resonance circuit is achieved. By the equalization circuit, the switch loss of a switch device can be greatly reduced, and the equalization circuit has the advantages of a few energy storage devices, small circuit size and fast equalization speed, and is applicable to a battery management system of an energy storage device in an electric vehicle or an energy storage power station.

The invention realizes a nonaquesous alectrolyte battery with high energy density, high battery voltage and excellent life features, and the voltage management can be easily carried out; in general, according to one embodiment, there is provided an active material. The active material contains a composite oxide having an orthorhombic crystal structure. The composite oxide is represented by a general formula of Li 2+w Na 2-x M1 y Ti e-z M2 z O 14+delta. In the general formula, the M1 is at least one selected from the group consisting of Cs and K; the M2 is at least one selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn, and Al; and w is within a range of 0 <=w <= 4, x is within a range of 0 < x < 2, y is within a range of 0 <= y < 2, z is within a range of 0 < z <= 6, and delta is within a range of -0.5 <= <= 0.5.

A two-stage charging device including a power supply device and a battery module is provided. The battery module is equipped with a linear charging device, a controller and a battery. During the charging process, the controller determines the voltage difference between the main supply voltage provided by the power supply device and the battery voltage, and then outputs an adjusting signal to the power supply device according to the obtained voltage difference. Then the power supply device adjusts the supply voltage according to the adjusting signal to maintain the voltage difference between the supply voltage and the battery voltage approximately at a pre-set voltage level. The battery voltage will rise along with the passing of the charging time. If the voltage difference between the main supply voltage and the battery voltage is smaller than a lower voltage level, the controller will increase the voltage level of the adjusting signal so as to increase the power supplied by the power supply device. Conversely, if the voltage difference between the supply voltage and the battery voltage is larger than an upper voltage level, the controller will reduce the voltage level of the adjusting signal to enable power supply device to reduce the power supplied by the power supply device. Therefore, by making appropriate adjustments according to the level of the adjusting signal, the main supply voltage can be maintained at a voltage level slightly above the battery voltage.

A method for controlling injection timing for a gaseous fuel injector is described. In one example, the fuel injector is opened with a saturating fuel injector at a predetermined crankshaft angular position. In one embodiment, the predetermined crankshaft angular position corresponds to at least one crankshaft angular position where battery voltage increases during engine cranking.

An implantable electroacupuncture device (IEAD) treats a specified medical condition of a patient through application of electroacupuncture (EA) stimulation pulses applied substantially at or near a specified acupoint, its underlying nerves, or other target tissue location. The IEAD includes an IEAD housing having an electrode configuration thereon that includes at least two electrodes, and pulse generation circuitry located within the IEAD housing and electrically coupled to the at least two electrodes. The pulse generation circuitry is adapted to deliver stimulation pulses to the patient's body tissue at or near the target tissue location in accordance with a specified stimulation regimen, the stimulation regimen requiring that the stimulation session have a duration of T3 minutes and a rate of occurrence of once every T4 minutes, and wherein a ratio of T3/T4 is no greater than 0.05.

A thin battery with improved properties containing a cathode paste is presented. The cathode paste comprises a cathode active material, an electrolyte solution, one or more binding agent and boric acid. A method for preparing a cathode paste and a cathode are also provided.

Disclosed are a high-capacity negative electrode active material and a lithium secondary battery including the same. More particularly, the negative electrode active material includes 50 wt % or more of an alkali metavanadate based on the total weight of a negative electrode active material, wherein the alkali metavanadate has a crystalline phase or an amorphous phase, and a composition of formula AVO₃.

An engine control system includes an ignition switch, a starter switch which operates a starter of an engine after the ignition switch has been turned on, and a voltage increasing circuit which increases a battery voltage to a higher voltage. The engine control system controls the voltage increasing circuit to start to increase a voltage from a battery to the higher voltage upon a timing of turning on the starter switch. Thus, radio noises caused by an operation of the voltage increasing circuit may be avoided from time at which the ignition switch is turned on to time at which the starter switch is turned on (during a quiet time period).

A positive electrode active material of a nonaqueous electrolyte secondary battery according to an embodiment of the invention includes lithium cobalt compound oxide in which at least zirconium and magnesium are added, and lithium nickel manganese compound oxide having a layered structure. The lithium cobalt compound oxide contains at least two types of zirconium- and magnesium-added lithium cobalt compound oxides having zirconium added amounts different from each other. The charging potential of the positive electrode active material is more than 4.3 V and 4.6 V or less versus lithium. With such a constitution, a nonaqueous electrolyte secondary battery using a plurality of positive electrode active materials having different physical properties which not only is capable of being charged at a high charging voltage of more than 4.3 V and 4.6 V or less versus lithium, but also has excellent charging/discharging cycle property and excellent charged storage properties without lowering the battery capacity.

The invention provides a battery including a power generating element container, a positive electrode mixture, and a hydrogen gas permeable sheet provided in an opening of the power generating element container, the hydrogen gas permeable sheet having a water repellence of 2 kPa or more and a He gas permeability at 30° C. in a range of 2×10⁻⁶ to 10000×10⁻⁶ (cm³ (STP) cm/sec·cm²·cmHg), wherein a distance between the positive electrode mixture and the hydrogen gas permeable sheet gradually decreases toward a side wall of the power generating element container.

The invention provides a charging and discharging control method and an energy storage system, which are applied to the technical field of direct current energy storage. The method characterized in that a preset voltage range is set, the lower limit value of the preset voltage range is greater than the upper limit value of the rated voltage range of a DC/DC converter, and after the battery voltage of an energy storage battery is acquired, if the obtained battery voltage is within the preset voltage range, the following battery storage mode is executed: controlling a DC/DC converter in the energy storage inverter to be in a bypass state, and controlling a DC/AC converter in the energy storage inverter to perform current conversion work. According to the method, under the condition that the battery voltage is larger than the upper limit value of the rated voltage range of the DC/DC converter, the DC/DC converter is controlled to be in a bypass state, the DC/AC converter directly carries out current conversion work, limitation of the DC/DC converter is removed, and therefore the higher battery voltage is matched, and the use range of the energy storage inverter can be widened within a certain range.

The present invention provides a charge storage device, comprising a pair of electrodes, each electrode being operable to store electric charge and having a respective capacitance Cp, CN that is different to the other, with the ratio of the capacitances CP/CN being greater than 1. In exemplary embodiments, the charge storage device may be an asymmetrical supercapacitor, which is operable to provide an enhanced energy capacity by increasing the cell voltage through unequalising the electrode capacitance. Hence, by increasing the CP/CN ratio an improved power capability can be achieved over conventional devices, while offering a simple and low cost manufacturing strategy. The present invention has particular application with cameras, electric vehicles, elevators, renewable energy stores, fuel cells, batteries and many forms of electronic devices.

Disclosed is an aluminum negative electrode battery comprising a closed space provided by at least one member including a hydrogen gas permeating member that contains an organic material having a He gas permeability of 2×10⁻¹⁰ (cm³(STP)cm/sec·cm²·cmHg) or more at 30° C., and a power generating element including an electrolyte, a positive electrode and a negative electrode containing at least one of aluminum and aluminum alloy, and the power generating element provided in the closed space.

Provided are a solid electrolyte composition containing an inorganic solid electrolyte having conductivity of ions of metals belonging to Group I or II of the periodic table, a binder, and a dispersion medium, in which the dispersion medium includes an alicyclic compound composed of a carbon atom, a hydrogen atom, and/or a halogen atom, and a boiling point of the alicyclic compound at 760 mmHg is 100° C. or higher and 180° C. or lower, a solid electrolyte-containing sheet, an all-solid state secondary battery, and methods for manufacturing a solid electrolyte-containing sheet and an all-solid state secondary battery.

The invention discloses a lithium battery positive pole piece, a preparation method thereof and a lithium battery adopting the positive pole piece, and belongs to the field of lithium ion power batteries. The positive pole piece comprises a positive current collector and a positive coating layer, the positive current collector has two opposite surfaces, and the positive coating layer is arranged on at least one surface of the positive current collector; and the positive electrode coating layer comprises a first coating layer, a second coating layer and a third coating layer from one side of the positive electrode current collector to the outside. The lithium-rich lithium manganate in the positive pole piece is low in price, and several materials are mixed, so that the material cost and the battery cost can be reduced, and the benefit is increased. The technical process method is simple, the battery capacity is improved on the premise that the sizes of the battery and the battery pack are not changed, and the safety performance of the battery is improved.

The invention belongs to the fields of chemical engineering and industries, and especially relates to the field of a flow battery with large scale energy storage ability. The negative electrode pair of the battery is a titanium pair, the positive electrode of the battery is Co (III)/Co (II), Mn (III)/Mn (II), Mn (IV)/Mn (II), I (VII)/I (V) or I (V)/I, the electrolyte solutions of the positive electrode and the negative electrode are separated through an ion exchange membrane, and the electrolyte solutions of the positive electrode and the negative electrode respectively flow between a solution storage tank and the battery under the promotion of a pump. The fluid battery has the advantages of high battery voltage, simple manufacturing process, low cost and high cycle life.