55results about How to "Stable discharge voltage" patented technology

Disclosed are method and apparatus for improving battery performance by transferring waste heat generated from heat generating components to the battery that, when brought to a high temperature, attains better performance according to temperature characteristics of the battery. According to the disclosure, an electronic device capable of effecting improved battery performance comprises a central processing unit generating waste heat when being operative; a battery for supplying power to said electronic device; and thermal conducting means, first end thereof making thermal contact with said central processing unit and second end thereof making thermal contact with said battery, causing heat transfer between said central processing unit and said battery. Said waste heat generated by said central processing unit is transferred to alter the temperature of said battery such that its output voltage is stabilized and capacity enlarged. Thermal pads can be disposed between said first end of said thermal conducting means and said electronic component, or between said second end of said thermal conducting means and said battery for increasing heat transfer rate. A fan can also be incorporated to cool the central processing unit.

The invention relates to a positive pole of a lithium manganese battery, which comprises active substances of the positive pole, namely manganese dioxide, graphite, polyfluortetraethylene and a fluorocarbon material, wherein the ratio of the contents of the manganese dioxide to the graphite to the polyfluortetraethylene to the fluorocarbon material is equal to 1:(0.06-0.08):(0.05-0.08):(0.01-0.3) according to the mass ratio. The cathodic formula greatly improves the capacity and high-current discharge capability of lithium batteries, and is particularly suitable for being taken as a driving power supply of digital products.

The invention discloses a preparation method of a PEO based polymer diaphragm. The preparation method of the PEO based polymer diaphragm is characterized by comprising the following steps: polyethylene glycol PEG and isocyanate silane coupling agents are placed in a solvent to make the polyethylene glycol completely react; after the obtained product is purified, the purified product is mixed withsilicon dioxide hydrosol according to the molar ratio of the contained silicon dioxide to react completely, wherein the molar ratio is 2:1 to 2:1.5; after the obtained product is purified, the purified product and polypropylene glycol PPG are placed in the solvent according to the ratio of 1:8 to 1:10 to react completely; and the PEO based polymer diaphragm is obtained by drying and diaphragm forming. The PEO based polymer diaphragm prepared by the invention has excellent mechanical properties and safety performance; and the primary battery prepared with the PEO based polymer diaphragm has long storage life, stable discharge, safety and reliability.

The invention provides a high voltage discharge tube. The discharge tube comprises insulating tubes, connection loops, conducting rods and electrodes, wherein the connection loops are respectively connected at the two ends of the insulating tubes and are used for sealing the insulating tubes; one end of the conducting rods is fixedly arranged at the inner sides of the connection loops; the electrodes are fixed at the other end of the conducting rods; binding posts for connecting the discharge tube to a circuit are arranged at the outer sides of the connection loops; and the insulating tubes are filled with pure hydrogen for extinguishing arc. The discharge tube has the following advantages: the discharge tube has small volume, bears high overvoltage, prevents explosion, protects the environment and does not have polarity (the polarity is not obvious), residual voltage or noises; the overvoltage energy rapidly breaks down and is discharged in the discharge tube and is earthed to be released via the discharge tube, so the discharge tube is suitable for the inflammable and explosive hostile environment; the sealed discharge tube ensures the discharge voltage to be stable and not to be affected by the humidity and air pressure of the ambient environment; and the discharge tube has low capacitance and inductance, thus not affecting the protected circuit.

The invention discloses a heteroatom-doped porous carbon material and a preparation method thereof and an application in a zinc-air battery. A three-dimensional network structure self-assembly body isformed by a biomass material in an alkaline solution through self-assembly; and the three-dimensional network structure self-assembly body is freeze-dried, put into a protective atmosphere and carbonized to obtain the heteroatom-doped porous carbon material. The heteroatom-doped porous carbon material is high in catalytic activity and good in stability and can replace existing Pt / C for use, and the zinc-air battery with stable discharge voltage and high capacity can be obtained when the heteroatom-doped porous carbon material is applied to the zinc-air battery as an oxygen reduction catalyst.The heteroatom-doped porous carbon material is simple in preparation process and low in cost and is expected to be applied to industrial production.

A built-in maintenance-free Ni-Cd alkaline storage battery mainly comprises a positive plate, a negative plate, a spacer, a battery container, an assembling air plug, auxiliary parts and electrolyte. The storage battery is characterized in that: a pored absorption box with dehydrogenation catalyst arranged inside is also arranged above the electrolyte inside the battery container; the assembling air plug is preferably a valve-controlled assembling air plug. The adoption of the present invention can maintain the advantages of the prior Ni-Cd alkaline storage battery, improve charge efficiency by 20 percent, ensure discharge rate can meet the discharge requirements of a Ni-Cd alkaline storage battery at high, middle and low rate, and guarantee stable discharge voltage as well as safe and reliable quality. Liquid adding maintenance period can reach twenty times more than the prior Ni-Cd storage batteries, so as to realize the real maintenance exemption of Ni-Cd storage batteries.

The invention relates to a dual-phase electrolyte and a lithium-silver battery, belonging to the technical field of chemical power supplies. The dual-phase electrolyte comprises a water solution electrolyte and a hydrophobic organic electrolyte, wherein an organic polymer film of polypropylene, polyethylene or a mixture of polypropylene and polyethylene is arranged between the two phases of the electrolytes as a diaphragm; and the water solution electrolyte comprises a lithium salt and water, the hydrophobic organic electrolyte comprises a lithium salt, propene carbonate, dimethyl carbonate, diethyl carbonate or a mixture thereof, and lithium ions in the electrolytes are 0.5-1mol / L. The battery comprises the dual-phase electrolyte, a silver oxide positive pole arranged in the alkaline water solution electrolyte, a lithium negative pole arranged in the hydrophobic organic electrolyte and a conducting wire. The hydrophobic organic electrolyte in the dual-phase electrolyte has the advantages of high electric conductivity, low diaphragm impedance and good hydrophobicity, flexibility and chemical stability; and the battery has the advantages of steady discharge voltage, high energy density and high power density.

The invention discloses a negative electrode material applied to a lithium ion battery and a preparation method of the negative electrode material. The negative electrode material applied to the lithium ion battery is composed of a spinel lithium titanate nanotube and an activated carbon material. The method comprises the following steps: uniformly mixing tetrabutyl titanate and Li2CO3 (or lithium sources such as LiOH), regulating the mixture to be alkaline by using ammonia water and hydroxylamine hydrochloride, and then transferring into a high-pressure kettle and performing hydrothermal reaction at 100-200 DEG C for 24 hours above; cleanly washing the reacted product by respectively using deionized water and absolute ethyl alcohol, and roasting in vacuum at a certain temperature to obtain the spinel lithium titanate nanotube; and heating the activated carbon material at high temperature, and uniformly mixing the activated carbon material with the spinel lithium titanate nanotube to prepare the negative electrode material for the lithium ion battery. Spinel lithium titanate can guarantee the excellent circulating stability of the lithium ion battery, also has the advantages of over-charge resistance, heat stability, high security and large specific capacity, and has wide application prospect when serving as the material for the negative electrode of the lithium ion battery.

The invention provides a preparation method of a high-performance silicon carbon-graphite negative material. The preparation method comprises the following steps: taking silicon powder as a raw material, smashing titanium-containing compound and the silicon powder through ball-milling to obtain nanometer silicon slurry; mixing the nanometer silicon slurry and high-molecular compound and then performing vacuum-drying to obtain the silicon carbon precursor; performing dynamic carbonization and screening on the silicon carbon precursor, the high-molecular compound and the graphite, thereby obtaining the silicon carbon-graphite composite material. The problem that the conventional Si / C is bad in cycle performance and easy to expand is solved, and the cycle stabilization performance is improved.

The invention relates to a discharge circuit with a constant voltage and a constant current. An input end of a power inductor is connected with a power supply input end; a switching control end of a switching circuit is connected with a control chip, one switching connection end of the switching circuit is connected with an output end of the power inductor, and the other switching connection end of the switching circuit is grounded; an anode of a freewheel diode is connected with the output end of the power inductor and a cathode of the freewheel diode forms a power supply output end; a sampling connection end of a voltage sampling circuit is connected with the power supply output end, and a sampling output end of the voltage sampling circuit is connected to the control chip; one end of acurrent sampling resistor is grounded, and the other end of the current sampling resistor is connected with an output end of an Atmosphere Pressure Glow Discharge (APGD) excitation source; a first comparison signal input end of a comparison feedback circuit is connected to the other end of the current sampling resistor, a second comparison signal input end of the comparison feedback circuit is connected with a reference voltage, and a feedback signal output end of the comparison feedback circuit is connected to the control chip; and the control chip respectively implements negative feedback regulation of the voltage and the current according to sizes of signals transmitted by the voltage sampling circuit and the comparison feedback circuit. The discharge circuit disclosed by the inventionis stable in discharge voltage and current and small in time delay in the discharging process.

The invention relates to the field of lithium batteries, and discloses a lithium-ion electrode material and a lithium-ion power battery. The lithium-ion electrode material is composed of the following constituents at a mass ratio: 93%-95% of active substance, 0.5%-1.5% of conductive binder, 1.5%-2.5% of polyvinylidene fluoride, 0.5%-3% of carbon nano tube and 0%-2.5% of conductive carbon black. Application of the technical scheme of the embodiment is beneficial to improvement on the rate capability, safety and service life of the battery.

The invention provides spherical spinel lithium titanate and a preparation method and an application thereof. The preparation method includes the following steps: successively dissolving cetyl trimethyl ammonium bromide and lithium acetate in absolute ethyl alcohol to obtain a mixed solution; slowly dripping butyl titanate into the mixed solution under magnetic force stirring to form a yellow transparent solution, and continuing to stir to form yellow transparent gel; aging the yellow transparent gel in the air to form white gel, drying the obtained white gel in the air at 100 DEG C to form a dry gel precursor; grinding the dry gel precursor, pre-sintering the dry gel precursor at 700-900 DEG C for 4 hours, and carrying out heat treatment at temperature of 700-900 DEG C for 12 hours to obtain the spherical spinel lithium titanate, and the spherical spinel lithium titanate can be applied in lithium ion battery cathode materials. The spherical spinel lithium titanate provided by the invention has the characteristics of high tap density, good processing performance, good compatibility with electrolyte, excellent electrochemical performance and the like, and is wide in preparation raw material source, low in cost, short in period, low in temperature, simple and reliable in process and easy to achieve industrial production.

The invention relates to a high-security long-life ternary material battery. Cathode size comprises the following solid matters by mass percent: 92.0-95.5% of ternary material, 3.0-7.0% of polyvinylidene fluoride and 1.5-2.5% of oily carbon nanofibers, and anode size comprises the following solid matters by mass percent: 90.0-93.5% of lithium titanate, 1.0-2.4% of sodium carboxymethylcellulose, 3.5-7.0% of a binding agent, 0.3-1.0% of SP type conductive carbon black, 0.5-1.8% of C45 type conductive carbon black and 1.2-2.4% of KS-6 type conductive carbon black. The high-security long-life ternary material battery provided by the invention is qualified in security, under room temperature condition, continuous charging and discharging is carried out according to 1C charge-discharge system, capacity retention ratio after 2000 cycles is higher than 80%, and operating requirements of a small electric tool, aviation, spaceflight and new energy automobiles can be met.

The invention discloses a preparation method of graphitized hollow carbon microspheres capable of being applied to sulfur carrying and application thereof. A hollow carbon microsphere is high in graphitization degree, and can provide a fast channel for electron transfer, so that the hollow carbon microsphere has high ionic conductivity; the hollow carbon microsphere is complex in structure, has good mechanical strength, can not only improve electron transfer of lithium-sulfur batteries, but also enlarge the contact area between sulfur and electron and improve the sulfur utilization. The methodis simple to operate, and the hollow carbon microsphere can improve the rate capability and cycle performance of the lithium-sulfur batteries when being applied to the batteries.

The invention provides a preparation method of a high-stability composite positive electrode material for a lithium-sulfur battery, and the method employs carbon-coated carbon fluoride as a functionalcarrier of sulfur, so that the cycling stability, the rate capability, the first discharge capacity and the discharge voltage platform of the composite positive electrode material can be remarkably improved; the utilization rate of the active material in the positive electrode material is improved, and the important significance is realized on prolonging the service life, energy and power performance of the lithium-sulfur battery. By adopting the preparation method disclosed by the invention, two solid-phase products with coated structures can be subjected to ball milling and then are meltedand diffused to enable sulfur to be melted and permeated into two phases, so that the positive electrode material is prepared through combination. The process has the technical advantages that after sulfur is coated with carbon, the sulfur can be more uniformly dispersed in the prepared positive electrode material through ball milling and melting diffusion, thereby reducing the agglomeration of the sulfur; and the coating size can reach the nanoscale. However, conventional mixing of elemental sulfur and a conductive agent cannot effectively coat sulfur, and the sulfur agglomeration phenomenonis serious.

The invention discloses a charging and discharging control and management method and device for SC-Li-SC hybrid energy storage, and belongs to the field of hybrid energy storage. The device comprisessuper capacitors, a rechargeable battery, a voltage stabilizing device, a current sensor, and a controller. The method comprises a method of smoothing charging power with strong randomness and large fluctuation amplitude, a method of judging whether a single super capacitor finishes charging the rechargeable battery, a method of switching the super capacitors to enable the super capacitors to performing charging and discharging efficiently, and a method of realizing the approximate voltage-stabilizing discharging of the rechargeable battery. The current sensor is used for detecting the currentwhen the super capacitors charge the rechargeable battery; the controller controls the working states of the super capacitor SC1 and the super capacitor SC2 according to the current between the supercapacitors and the rechargeable battery. According to the charging and discharging control and management method and device of the invention, through a corresponding control strategy, a whole hybridenergy storage device can stably and safely charge and discharge energy under the conditions of unstable new energy generation power and large fluctuation amplitude by utilizing respective performanceadvantages of the super capacitors and the rechargeable battery.

The invention relates to a preparation method of lithium vanadium phosphate of lithium ion batteries cathode materials, which comprises the following steps: weighing a vanadium-containing compound, a lithium-containing compound and phosphate according to mol ratio of 1:(2.8-3.2):3; weighing citric acid which accounts for 30%-60% of mass of raw material, adding distilled water to prepare a 20%-50% of solution, uniformly mixing the vanadium-containing compound, the lithium-containing compound and phosphate, adding 15-45% of deionized water and reacting for 0.5-2 hours; adding a citric acid solution in the reactive raw material and heating to obtain a solid phase, drying, performing ball milling, putting into an inert atmosphere furnace and heating to the temperature of 300-1000 DEG C, and keeping the temperature for 2-24 hours to prepare lithium vanadium phosphate. The preparation method provided by the invention uses an autocatalytic reaction to uniformly mix the raw material, and is good for providing primary particles with small size to lithium vanadium phosphate.

The invention relates to an insulator protection device and belongs to the field of electric protection in an electric power grid, and particularly, relates to a discharge gap device with voltage-equalizing rings. The discharge gap device can prevent flashover on the surface of an insulator. With the discharge gap device adopted, the problem of corona produced by a composite insulator under overvoltage and the problem of the burning of the insulator caused by the flashover on the surface of the insulator can be solved. High-voltage arc-striking rings and voltage-equalizing arcing horns which are in longitudinal symmetry are connected on fittings at two ends of a composite insulator, such that the discharge gap device can be formed. The discharge gap device of the invention is directly fixed on the fittings at the two ends of the composite insulator and is suitable for composite insulators; and the discharge gap device is a novel discharge gap device which is advantageous in quick installation, voltage-equalizing and anti-corona properties, stable discharge voltage, excellent arc-resistant arc-distinguishing performances and long service life.

The invention relates to a preparation method of an anode material compounding three-dimensional porous silicon doped titanium source with carbon. The preparation method comprises the following steps:preparing porous silicon, adding deionized water or absolute ethyl alcohol and a titanium source, and grinding, so that nano slurry is obtained; carrying out spray drying with nano mixed slurry, so that a precursor is obtained; roasting the precursor, cooling, sieving, carrying out deposition coating through CVD, and then cooling in an inert gas atmosphere, so that a three-dimensional porous silicon composite is obtained. The preparation method provided by the invention solves the problems of the conventional Si / C cycle performance and expansion.

Characters of the invention are that LiFePO4 prepared through method of high temperature solid phase is olivine type structured active material of battery; the anode material of lithium ion battery in use for miner's lamp gives full play to features of simple preparing technique, low cost, high safety performance and environment friendly. With LiFePO4 being as anode material and packed by aluminum-plastic, lithium ion battery for miner's lamp can pass each security testing. The material possesses foreground applicable to anode material of lithium ion battery in use for miner's lamp.

The invention provides a nickel-hydrogen storage battery electrode plate with larger capacity and a preparation method thereof and also provides a nickel-hydrogen storage battery which has long service life, good use safety and larger capacity and can be reused. The nickel-hydrogen storage battery electrode plate comprises an electrode plate blank spliced by a plurality of electrode plate strips, an electrode plate frame for installing the electrode plate blank, and a positive and negative active substance packed in the middle of the electrode plate strips. The nickel-hydrogen storage battery comprises a positive electrode plate, a negative electrode plate, a partition, a battery container, electrolyte, a positive collector plate, a negative collector plate and a post terminal, wherein the positive electrode plate and the negative electrode plate of the nickel-hydrogen storage battery adopt the nickel-hydrogen storage battery electrode plate. The electrode plate of the storage battery can be machined into a needed size according to needs; the collector plates are in acetylene welding or convex rivet welding with the positive electrode plate and the negative electrode plate, and the welded electrode assembly has very high mechanical strength, thus the capacity of the produced storage battery is greatly improved as compared with that of a traditional cylindrical or a square nickel-hydrogen storage battery.

The invention discloses an alkaline manganese battery negative electrode additive containing a wetting dispersant, and the alkaline manganese battery negative electrode additive comprises the following components in percentage by weight: 60-70% of zinc powder, 1-3% of zinc oxide, 0.1-0.3% of anionic wetting dispersant, 0.3-0.8% of nonionic surfactant, 0.1-0.25% of cationic surfactant composition,0.2-0.3% of indium hydroxide, 0.1-0.5% of cerium oxide, 0.1-0.3% of thickener, 0.1-0.4% of tin powder, 0.1-0.2% of bismuth powder and 9.2 mol / L of potassium hydroxide solution which is supplemented to100%. The addition of the alkaline manganese battery negative electrode additive can significantly improve the discharge capacity and the average discharge time of the alkaline manganese battery which has better market prospect.

The invention discloses a novel cavel combination gap. The novel cavel combination gap comprises an H-shaped steel base, a first base sliding block, a second base sliding block, a third base sliding block, a cavel gap combination, an adjustable supporting column, a metal plate and a metal plate supporting seat. The first base sliding block, the second base sliding block and the third base sliding block are respectively embedded in the H-shaped steel base, and can slide along the H-shaped steel base; a first supporting column insulator is carried by the first base sliding block; the second base sliding block is used for supporting a second supporting column insulator; the metal plate is fixed to the second supporting column insulator through the metal plate supporting seat; the third base sliding block is used for carrying the adjustable supporting column; the cavel gap combination comprises a first insulator supporting column, a first cavel electrode arranged on the first insulator supporting column, the adjustable supporting column and a second cavel electrode arranged on the adjustable supporting column. Due to the implement of the novel cavel combination gap, the metal plate is additionally arranged between the cavel electrodes, and accordingly gap thunder and lightning withstand voltages of the gap under the same gap length condition can be increased and the power-frequency breakdown voltages of the gap can be reduced.

The invention relates to the technical field of electronics, and provides a battery charging and discharging control circuit. The circuit comprises a charging control module, a capacitor, a first power transistor, a second power transistor, an inductor, a third power transistor, a fourth power transistor and a discharging control module, wherein the charging control module is used for detecting and controlling the on and off of the first power transistor and the second power transistor according to the charging current when the charging control module is connected with the adapter so as to perform constant-current charging on the battery; and detecting and controlling on and off of the first power transistor and the second power transistor according to the battery voltage so as to performconstant-voltage charging on the battery. The discharge control module is used for detecting and controlling the connection and disconnection of the third power transistor and the fourth power transistor according to the discharge voltage when the discharge control module is connected with electric equipment or floats, so the discharge voltage is kept stable. According to the invention, the problems of low battery charging efficiency and easy heating when a drive-by-wire control mode is adopted for charging in the prior art are solved.

The invention discloses an air cathode of an aluminum air battery, and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out ultrasonic dispersion, hydrothermal treatment, centrifugal washing and drying on GO, KMnO4 and MnSO4 to obtain an alpha-MnO2@MnO(OH)@GO composite material in which alpha-MnO2 nanorods, MnO(OH) nanorods and flaky GO are uniformly distributed, then pressing a slurry obtained by mixing the alpha-MnO2@MnO (OH)@GO composite material, conductive carbon black and polytetrafluoroethylene emulsion (with the solid content of 58-63%) according to a mass ratio of (1-1.5): (2-3): (1-2) as a catalyst layer, a foamed nickel current collection layer coated with the catalyst layer slurry and a waterproof breathable layer together to obtain the air cathode. According to the air cathode, the discharge voltage and the discharge stability of the aluminum air battery can be remarkably improved, the performance of the air cathode is close to that of a commercial 20% Pt / C air cathode, and the air cathode has a wide commercial application prospect.

The invention is concerned with the plasma display that can maintain the discharge stably, includes: the top base panel forming the scanning electrode and the maintaining electrode on it abreast; the below base panel forming the addressing electrode on it that crosses with the scanning electrode and the maintaining electrode. The addressing electrode includes: the addressing main electrode that is vertical with the scanning electrode and the maintaining electrode and inphase discharge with the scanning electrode; the addressing auxiliary electrode that extends certain extent form both side of the addressing main electrode in the area between the scanning electrode and the maintaining electrode according to the vertical direction of the addressing electrode. The invention can prevent the mis-discharge because of the instable wall electric-charge by self-removing discharge between the scanning electrode and the maintaining electrode, in order to maintain the stable discharge.