40results about How to "Reduce equivalent internal resistance" patented technology

The invention belongs to the field of electrochemistry, and discloses an electrolyte for a double-electric-layer capacitor. The electrolyte for the double-electric-layer capacitor comprises pyridines ionic liquid and alkyl trimethyl silane, and the molar ratio of the pyridines ionic liquid and the alkyl trimethyl silane is 1:0.001-1:0.05. According to the electrolyte for the double-electric-layer capacitor, the affinity of the pyridines ionic liquid and diaphragm materials such as PP and PE is small due to high viscosity and large surface tension of the pyridines ionic liquid, so that the equivalent internal resistance of the double-electric-layer capacitor with the pure pyridines ionic liquid being used as the electrolyte is large, after the alkyl trimethyl silane is added in the pyridines ionic liquid, due to the fact that the alkyl trimethyl silane is a nonionic surface active agent, the alkyl trimethyl silane can increase the affinity of the pyridines ionic liquid and the diaphragm materials such as the PP and the PE commonly used for capacitors, and the equivalent internal resistance of the double-electric-layer capacitor is greatly lowered. Therefore, the equivalent internal resistance of the double-electric-layer capacitor is greatly lowered.

The invention belongs to the field of electrolytic solutions, and discloses a double electric layer capacitor electrolytic solution which is characterized by comprising ionic liquid and carbon nano tube powder with the mass ratio of 1:0.001-0.1. The ionic liquid is formed by any one negative ion of imidazolium cation or a pyrrole positive ion and fluoboric acid positive ion, a fluorophosphoric acid negative ion, a diimine (fluoroform sulfonyl) negative ion, an acetic acid negative ion, a methyl organosulfate positive ion, a trifluoroacetic acid negative ion, a trifluoromethane sulfonic acid negative ion, a dicyandiamide negative ion and a trifluoroacetyl trifluoromethanesulfonamide negative ion. The double electric layer capacitor electrolytic solution is formed by the ionic liquid and the carbon nano tube powder in a mixed mode, the negative ions of the ionic liquid can be adsorbed by carbon nano tubes, the carbon nano tubes can promote efficient dissociation of the ionic liquid, the transference number of the ionic liquid is increased, and thus equivalent internal resistance of a double electric layer capacitor is greatly reduced; the carbon nano tubes do not volatilize, so flammable and combustible danger coefficients cannot be increased.

The invention discloses a super-capacitor high-conductive active carbon electrode manufacturing method. The method comprises the following steps of 1) manufacturing an oxidized grapheme/active carbon mixture: adding an active carbon raw material into an oxidized graphene solution, under an ultrasound condition, carrying out a reaction at a temperature of 80 DEG C to 100 DEG C for 1h to 10hs, after the reaction is ended, obtaining a mixture solution; 2) manufacturing a grapheme/active carbon electrode: adding the mixture solution obtained from the step 1 into a Teflon container, and then adding a catalyst, after sealing, carrying out the reactor at a temperature of 80 DEG C to 200 DEG C for 1h to 10 hs, after the reaction is ended, using distilled water to fully clean, and drying for 12 to 24 hs under the temperature of 80 to 100 DEG C to acquire a high-conductive active carbon electrode. The active carbon manufactured in the invention is dispersed in a grapheme three-dimensional network structure. A hydrothermal technology is used to manufacture and acquire an aerogel structure. A specific area of a composite material can be further increased and simultaneously an internal structure of a composite electrode material is improved. A hierarchical porous structure, where a macropore, a mesoporous and a micropore exist, is formed. Specific capacitance performance of an electrode material is further increased.

The invention relates to a low-temperature oscillation charging control circuit and method for a storage battery pack. According to the control circuit, the positive output end of a charger is connected to a positive wiring terminal used for connecting the storage battery pack through an inductor L1, an inductor L2 and a capacitor C1 which are connected in series, and the capacitor C1 is connectedto two ends of a switch K in parallel; the negative output end of the charger is divided into two paths, one path passes through a switching device V and a diode D1, which are in reverse parallel connection, and is connected to a connection node between the inductor L1 and the inductor L2 which are connected in series, the other path is connected to a negative wiring terminal used for connectingthe storage battery pack, and a control pole of the switching device V is connected to a switch control circuit through a driving circuit. The internal resistance increases due to the polarization orvulcanization of the storage battery in the low temperature environment, which results in a phenomenon of no charge or insufficient charge. The oscillation charging method of the invention enables high-frequency alternating current flowing through the battery pack to greatly reduce or eliminate the polarization or vulcanization of the batteries, thereby eliminating the internal resistance of the batteries caused by the low temperature in a targeted manner, reducing the internal resistance of the batteries, promoting the consistency of the internal resistance of the batteries, and further activating the batteries and prolonging the service life of the storage battery pack.

The embodiment of the invention discloses a voltage converter and a voltage change control method. The voltage converter comprises a plurality of basic unit circuits and a control signal transmissioncircuit, wherein the plurality of basic unit circuits are sequentially cascaded, and each basic unit circuit comprises two bridge arms which are symmetrically arranged and have the same circuit structure. Any one bridge arm comprises the following components: four power switch tubes which are sequentially connected in series; a first position capacitor connected in parallel with the first positionpower switch tube and the second position power switch tube; a second position capacitor connected in parallel with the third position power switch tube and the fourth position power switch tube; anda fifth position capacitor connected in parallel with the second position power switch tube and the third position power switch tube. The control signal transmission circuit is used for generating and sending control signals to control eight power switch tubes in two bridge arms in each of the cascaded basic unit circuits to be switched on by stages, so that the basic unit circuit outputs an input voltage after reducing the input voltage, and the voltage outputted by the basic unit circuit is configured to be obtained based on the number of the basic unit circuits. With the voltage converterand the voltage change control method of the invention adopted, non-inductive voltage change is realized.

The invention discloses a NiO/SiN wire and a method for preparing an integrated supercapacitor electrode material with high performance by adopting the material. The preparation method comprises the following steps: (1) the SiN wire is taken as a framework, a nickel membrane is sedimented on the SiN wire by the electroless plating technique to produce a nickel-silicon nanometer wire composite; and (2) the produced nickel-silicon nanometer wire composite is subject to rapid thermal annealing oxidation treatment. The invention adopts the advantages of the SiN wire that the scale is small, the specific surface is large, the surface atom has a large amount of nonsaturated bonds, and the tensiometric property is great, and takes the SiN wire as the framework for loading the NiO nanometer structure. The NiO/SiN wire has high specific capacitance, low equivalent essential resistance and good charging and discharging properties, is compatible with the integrated circuit technique and can be used for preparing the integrated supercapacitor electrode material with high performance.

The invention belongs to the field of electrochemistry, and discloses an electrolyte and a capacitor using the electrolyte. The electrolyte comprises hexafluorophosphate ionic liquid and an aza-ether compound with a molar ratio of 1:(0.001-1):0.05. The invention further provides the electrolyte used for the double-layer capacitor, the electrolyte is formed by mixing the hexafluorophosphate ionic liquid with the aza-ether compound, the aza-ether compound can form a coordination compound with PF6-, and accordingly dissociation level of the hexafluorophosphate ionic liquid is increased, conductivity of the hexafluorophosphate ionic liquid is greatly increased, and equivalent internal resistance of the double-layer capacitor is greatly lowered. The aza-ether compound is used as addictive, the conductivity of the hexafluorophosphate ionic liquid can be improved greatly by only needing less than 5% of the total mass of the hexafluorophosphate ionic liquid, the conductivity of the hexafluorophosphate ionic liquid is improved by adding organic solvent so that the hexafluorophosphate ionic liquid which is low in solubility and is dissolved by a great quantity of organic liquid is dissolved, and usage cost of the electrolyte is greatly saved.

The invention relates to a manufacturing method of double electric layer capacitor volume produce, especially utilizing processing technology of the sheet conductive rubber and isolation rubber to make more than two double electric layer capacitor monomers at once. Its feature is that the conductive rubber and isolation rubber are each formed to sheet, and the isolation rubber is set many corresponding perforated electrode holes sites. Then according to the order as the conductive rubber, the isolation rubber, the perforated electrode, the septum, the isolation rubber, the perforated electrode, the conductive rubber, they are superposed orderly. The perforated electrode is superposed at the destined position at the isolation rubber; then after die cutting processing, more than two double electric layer capacitor monomers are gained. The advantage of the capacitor produce is that the equivalent series connection inner resistance is low, and the uniformity is good. It suits to industrialization volume production.

The invention belongs to the field of electrochemistry, and discloses a capacitor with double electric layers and electrolyte for the capacitor. The electrolyte for the capacitor with the double electric layers comprises fluoro-fatty acid salt ionic liquid and fluoro-alkyl boride, and the molar ratio of the fluoro-fatty acid salt ionic liquid to the fluoro-alkyl boride ranges from 1:0.001 to 1:0.05. The electrolyte for the capacitor with the double electric layers is prepared by mixing the fluoro-fatty acid salt ionic liquid with the fluoro-alkyl boride, complexes can be formed by the fluoro-alkyl boride and fluoro-fatty acid radicals, accordingly, the dissociation degree of the fluoro-fatty acid salt ionic liquid is increased, the conductivity of the fluoro-fatty acid salt ionic liquid is greatly improved, and equivalent internal resistance of the capacitor with the double electric layers is greatly reduced. Besides, the fluoro-alkyl boride is used as an additive, an effect of greatly improving the conductivity can be realized only by utilizing the fluoro-alkyl boride with the dosage lower than 5% of the total mass, while a large amount of organic liquid is required to dissolve low-dissolvability fluoro-fatty acid salt ionic liquid when organic solvents are added to improve conductivity in the prior art, accordingly, the dosage of the electrolyte for the capacitor with the double electric layers is greatly reduced, and the cost of the electrolyte for the capacitor with the double electric layers is greatly saved.

The invention provides an electric heating method and an electric heating driving circuit. The method adopts a good conductor as a heating body, and comprises the steps of converting a power supply into a high-frequency oscillating electric signal, adding the high-frequency oscillating electric signal to the primary side of an isolation transformer, connecting the good-conductor heating body to the secondary side of the isolation transformer, wherein the number of turns of a secondary coil is far less than the number of turns of a primary coil. The heating driving circuit comprises a power supply capable of supplying power to the good conductor. In the invention, the power supply is converted into a high-frequency signal, and then the high-frequency signal is outputted by the secondary soil of the isolation transformer, so that extremely low battery internal resistance is generated, the power supply to the good conductor is realized, the good conductor itself is heated, the heat is directly conducted to the heated material, and the heat efficiency is improved.

The invention discloses an electrolyte for a double-layer capacitor. The electrolyte for the double-layer capacitor contains morpholine ionic liquid and polyoxyethylenealkanolamide, wherein the mass ratio of the morpholine ionic liquid to the polyoxyethylenealkanolamide is 1:0.001 to 1:0.05. The invention further discloses a preparation method of the electrolyte for the double-layer capacitor. The equivalent internal resistance of the double-layer capacitor can be greatly reduced.

The invention discloses an electrolyte for a double-layer capacitor. The electrolyte for the double-layer capacitor contains piperidine ionic liquid and polyhydroxy alcohol fatty acid ester, wherein the mass ratio of the piperidine ionic liquid to the polyhydroxy alcohol fatty acid ester is 1:0.001 to 1:0.05. The invention further discloses a preparation method of the electrolyte for the double-layer capacitor. The injection time is short, and the equivalent internal resistance of the double-layer capacitor can be greatly reduced.

The invention discloses a rubidium atomic clock working state detection signal measuring device. The rubidium atomic clock working state detection signal measuring device includes a first resistor, asecond resistor, a third resistor, a fourth resistor, a fifth resistor, a first diode, a second diode, a first operational amplifier and a second operational amplifier, and further includes two RC filters. The rubidium atomic clock working state detection signal measuring device has simple structure and stable performance; and through the combination of the two operational amplifiers and the two diodes, an alternating current detection signal can be converted into a direct current detection signal, and the temperature drift defect of an ordinary diode can be overcome; therefore, the rubidium atomic clock working state detection signal measuring device has lower equivalent internal resistance and temperature sensitivity, and can achieve a detection performance close to an ideal diode.