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 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.

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 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 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 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 provides a charge quantity measuring device which comprises an electrostatic simulation mechanism. The electrostatic simulation mechanism comprises a direct current high voltage power supply, an energy storage capacitor, a metal ball and an electrostatic conductive plastic sheet. The direct current high voltage power supply and the energy storage capacitor are connected in parallel. The positive pole of the energy storage capacitor is connected with the metal ball through a switch. The electrostatic conductive plastic sheet is adhered on the surface of the metal ball through an electrostatic conductive adhesive. The electrostatic simulation mechanism is provided with a sampling circuit and a measuring mechanism. The sampling circuit is connected in parallel with the measuring mechanism. The sampling circuit is composed of an input wire, a value set resistor and an output wire, wherein the input wire, the value set resistor and the output wire are connected in series. The measuring mechanism is a digital oscilloscope. Voltage waveforms in the sampling circuit during an electrostatic discharging process are measured by the measuring mechanism. The voltage waveforms are integrated. The quantity of charges, which flow to the ground during the process of electrostatic discharging to the ground, of an object is acquired.

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 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.