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

The invention discloses a switched switch capacitor type AC-AC converter with the fixed transformation ratio of 1 / 4 or 4. The switched switch capacitor type AC-AC converter comprises seven capacitors and eight power switch sets, the eight power switch sets are sequentially connected in series, each power switch set comprises two power switch tubes, and the source electrodes of the power switch tubes are connected in series. The two ends of two connected adjacent power switch sets in series are both connected with the capacitors, and a driving circuit is connected with the grid electrode of each power switch set. When the voltage of the converter drops, the input end of the converter is connected to the two ends of the eight power switch sets, and the output end is connected to the two ends of any capacitor. When the voltage of the converter rises, the input end of the converter is connected to the two ends of any capacitor, and the output end is connected to the two ends of the eight power switch sets. According to the switched switch capacitor type AC-AC converter, only the capacitors serve as energy storage elements, magnetic elements are not arranged, the input and output fixed transformation ratio is 1 / 4 or 4, the size of the converter is reduced, and the switched switch capacitor type AC-AC converter has the advantages of being low in equivalent internal resistance, high in power density, small in size, light in weight, high in power efficiency and the like.

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 an electrolyte for a capacitor and the capacitor using the electrolyte. The electrolyte comprises ionic liquid and nano-silver particles in a mass ratio of (1:0.001)-(1:0.01). The electrolyte has the following beneficial effects that the electrolyte is prepared through the mixture and reaction of the ionic liquid and the nano-silver particles; and after the ionic liquid and the nano-silver particles are mixed, the internal resistance of the electrolyte is reduced in the presence of silver ions, and the silver ions are partially reduced to silver simple substances in the charge-discharge process and the silver simple substances are relatively stable and can uniformly attach to the gaps of electrode materials to reduce the internal resistance of the electrode materials, thus greatly reducing the equivalent internal resistance of the electrical double layer capacitor.

A charge pump circuit and its control circuit and control method. The method includes: detecting the difference between the output voltage of the charge pump circuit and the input voltage in real time, comparing the current difference between the output voltage and the input voltage with a predetermined expected value of the difference, and outputting an error amplification signal; Generate a control voltage signal for controlling the charge pump circuit according to the error amplification signal, so that when the difference is greater than the expected value of the difference, the frequency of the control voltage signal changes positively with the difference , until the difference converges to the expected value of the difference. The application of this technical scheme can not only improve the response speed of the charge pump circuit, but also reduce the steady-state power of the circuit, which is beneficial to the miniaturization and integration of the chip.

The invention discloses an ultra-thin, self-supporting, flexible and all-solid-state super capacitor and a manufacturing method of the ultra-thin, self-supporting, flexible and all-solid-state super capacitor. The super capacitor comprises a position electrode, a solid electrolyte and a negative electrode, wherein the solid electrolyte is located between the positive electrode and the negative electrode to separate the positive electrode and the negative electrode, and the solid electrolyte evenly permeates inside a porous structure of the positive electrode and a porous structure of the negative electrode. The positive electrode and the negative electrode are made of carbon nanometer materials or carbon nanometer composite materials, and the outer side of the positive electrode and the outer side of the positive electrode are not completely embedded by the solid electrolyte and can be used for collecting currents. The thickness of the super capacitor is within the range of 10 nanometers to 10 micrometers, the inner portion of the capacitor is provided with no diaphragm, the outer portion of the capacitor needs no metal current collecting electrode or encapsulation, self-supporting can be realized, and at the same time the capacitor has high specific capacitance, high power density, high energy density, long life and high stability. The super capacitor has the advantages of being superior in performance, simple in manufacturing technology, and capable of satisfying the development demands of flexible, miniature, light electronic products at the same time, and having wide application prospects.

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 discloses an electrolyte solution for double-layer capacitors, the electrolyte solution for double-layer capacitors comprises morpholine ionic liquid and polyoxyethylene alkanolamide, the morpholine ionic liquid and polyoxyethylene alkyl alcohol The mass ratio of amides is 1:0.001 to 1:0.05. The invention also discloses a preparation method of the electrolytic solution for double-layer capacitors. The invention can greatly reduce the equivalent internal resistance of the electric double layer capacitor.

The invention provides a novel three-dimensional silicon structure supercapacitor electrode material and a preparation method thereof. The three-dimensional silicon structure is used as a base, an active layer is prepared on its surface, and a charge collection layer is covered on the surface of the active layer; the two-dimensional conductive material of the charge collection layer As the main body, the conductive polymer is used as the binder, and a porous network charge collection layer with high conductivity is prepared on the surface of the active layer. When preparing a large-area electrode material, in order to increase the charge collection efficiency, the metal gate electrode material is evaporated on the surface of the high-conductivity layer. The three-dimensional silicon structure electrode material prepared by the method does not need to consider the conductivity, purity and crystal form of the silicon substrate, and does not need to passivate the silicon surface, which reduces the raw material cost of the silicon electrode material and simplifies the preparation method of the silicon electrode.

The invention discloses an all-solid-state winding type supercapacitor and a production method thereof. The supercapacitor comprises a first electrode, a first interlayer, a second electrode, and a second interlayer which are sequentially arranged and wind firmly an integral film, wherein the second interlayer is an outermost layer; and the electrodes employs carbon nanomaterials or carbon nanocomposite materials. In the invention, a concrete scheme and an implementation process are provided for expanding and controlling the electrode size, so that an accommodation area of the electrode is substantially increased and a capacity of the supercapacitor is increase. The first interlayer employs a solid electrolyte to separate the adjacent electrodes, and the solid electrolyte can flatten a surface and bond electrodes during a device assembling process so that the electrodes and the interlayers are bonded in a firmer manner; and the outermost second interlayer can employ the solid electrolyte or an insulating layer. The supercapacitor is made entirely by flexible materials and has the advantages of being good in elasticity, extrusion-resistant, collision-resistant, simple, and portable; and application of the supercapacitor is widened.

The invention relates to a preparation method and application of a photo-anode, in particular, a preparation method and application of a homogenous barrier layer / frame titanium dioxide structure. Theinvention mainly aims to solve the problems of low electron transport efficiency and susceptibility of photoelectrons to recombination of a dye-sensitized solar cell with a mesoporous material-made photo-anode. The method includes the following steps that: 1, an impurity-removed conductive substrate is prepared; 2, a barrier layer reaction liquid is prepared; 3, a barrier layer / substrate is prepared; and 4, a TiO2 frame is prepared, so that the homogenous barrier layer / frame TiO2 structure can be obtained. The homogenous barrier layer / frame titanium dioxide structure prepared by using the preparation method can be used as the photo-anode of a dye-sensitized solar cell. With the method adopted, the homogenous barrier layer / frame titanium dioxide structure can be obtained.

The invention discloses a capacitor electrolyte solution with low internal resistance, which comprises lithium salt, organic solvent, ionic liquid and modified nano-silver, and the mass ratio of the lithium salt, organic solvent, ionic liquid and modified nano-silver is (0.5 ~1): (0.8~1.5): (0.3~0.8): (0.005~0.01). The present invention contains high-concentration lithium salts and high ionic liquid content, which can effectively improve the capacity and service life of capacitors; after silver ions are modified, it is beneficial to reduce the internal resistance of electrolyte; silver ions will have Part of it is reduced to a single substance and attached to the gap of the electrode material, thereby greatly reducing the equivalent internal resistance of the electric double layer capacitor.