8results about How to "Extended operating temperature range" patented technology

The invention discloses an electrolyte of an aqueous zinc-iodine battery, and relates to the technical field of zinc-iodine batteries, the electrolyte is prepared from an I + stabilizer, a hydrogen bond ligand, a low-freezing-point hydrogen donor solvent and a zinc salt, and the molar ratio of the I + stabilizer to the hydrogen bond ligand to the low-freezing-point hydrogen donor solvent to the zinc salt is 1: 0.5: 5: 0.5-1.5. The invention also provides a preparation method of the electrolyte and a zinc-iodine battery prepared by using the electrolyte. The zinc-iodine battery constructed by the invention can realize highly reversible I- / I2 / I + conversion and rapid iodide conversion kinetics in a wide temperature range of-25 DEG C to 40 DEG C, and has high energy density and excellent long cycle stability. In addition, due to the unique solvation structure of the electrolyte, the activity of water molecules in the system is reduced, and then the hydrogen evolution reaction and other side reactions are inhibited. Therefore, the invention provides a feasible strategy for realizing wide temperature range, high capacity and high performance of the zinc-iodine battery.

The invention provides a preparation method of a special aluminum electrolytic capacitor for a low-temperature-resistant detonator trigger, and the method comprises the following steps: cutting a positive electrode foil and a negative electrode foil, and riveting the cut positive electrode foil and negative electrode foil with a positive guide pin and a negative guide pin; placing electrolytic paper between the riveted positive electrode foil and negative electrode foil, winding the electrolytic paper to form a core package, injecting electrolyte into the core package, and sealing the core package in an aluminum shell by using colloidal particles to obtain a semi-finished capacitor; and cleaning the semi-finished product capacitor, sleeving, and sequentially carrying out primary aging sorting, secondary aging sorting, appearance observation and inspection to obtain the capacitor. The preparation method of the aluminum electrolytic capacitor special for the low-temperature-resistant detonator trigger is simple in production process, common in material and low in price, and the prepared aluminum electrolytic capacitor is excellent in electrical performance, wide in working temperature range and small in size.

The application discloses a kind of eutectic solvent and its preparation method and application, the eutectic solvent is used for the dissolution, separation or regeneration of cellulose and / or starch, the eutectic solvent includes first solvent, second solvent and water;The first solvent is selected from at least one of the compounds shown in formula 1.The eutectic solvent of the application has very good solubility for cellulose and / or starch, can quickly dissolve a large amount of cellulose and / or starch, is suitable for the dissolution, separation and regeneration of cellulose and / or starch, etc., and is low in cost, easy to prepare, the raw materials used are all harmless to the environment, can be recycled, is an environmentally friendly solvent system.

The present invention relates to a liquid crystal composition. The liquid crystal composition comprises four compounds having different structural formulas and a chiral compound. The four compounds having different structural formulas are at least one compound selected from general formula I, at least one compound selected from general formula II, at least one compound selected from general formula III, and at least one compound selected from general formula IV, respectively. By optimizing the content of each component in the liquid crystal composition, a clearing point is improved while reducing a phase transition point of the N-TB. Also provided is a bistable liquid crystal dimming device prepared by applying the liquid crystal composition, which widens the working temperature range of the bistable liquid crystal dimming device, and improves the value of the bistable liquid crystal dimming device in practical applications.

This invention provides a liquid crystal composition comprising 40%–70% component I, 0%–20% component II, 0%–20% component III, 5%–40% component IV, and 0%–30% component V. This liquid crystal composition exhibits a high clearing point and low rotational viscosity, which is beneficial for increasing the operating temperature range of the liquid crystal material and improving its response speed.

The present invention discloses a low-voltage bandgap reference voltage circuit without curvature compensation, comprising: a current source, a low-voltage loop oscillator, a charge pump, a clock amplitude converter, a voltage generator inversely proportional to absolute temperature, and a voltage generator directly proportional to absolute temperature; the current source generates a bias current; the clock signal output by the low-voltage loop oscillator is used as the input clock signal of the charge pump, and the charge pump obtains a voltage-multiplied output clock and a DC voltage, which are input into the clock amplitude converter to obtain a two-phase clock; the two-phase clock inputs a voltage generator inversely proportional to absolute temperature to obtain a voltage inversely proportional to absolute temperature; the voltage inversely proportional to absolute temperature is input into a voltage generator directly proportional to absolute temperature to obtain a reference voltage output. The present invention broadens the normal operating temperature range of the circuit and improves the power supply rejection ratio under the condition of low power supply voltage and no curvature compensation.

This invention discloses a method for measuring the attitude of a moving object based on a dual-line laser, belonging to the field of attitude measurement technology. A laser penetrates a reference laser receiving target and strikes a standard laser receiving target. One laser beam is fixedly illuminating a point on the reference laser receiving target. The line connecting the center points of the two targets is parallel to the laser beam and moves synchronously with the moving object. Coordinate systems are established at the center of the left side of both the reference and standard laser receiving targets. The coordinate values ​​of the laser illumination point in each target coordinate system are read, and the attitude angle of the moving object in space is calculated using spatial geometry. The attitude measurement method includes: measuring the yaw angle obtained by rotating the moving object around the Y-axis of the coordinate system, measuring the pitch angle obtained by rotating the moving object around the X-axis of the coordinate system, measuring the roll angle obtained by rotating the moving object around the Z-axis of the coordinate system, and calculating the coordinate value of one of the laser illumination points in the coordinate system of the standard laser receiving target (when no roll occurs).

The invention provides a highly-integrated two-axis rotary table, and relates to the technical field of rotary tables. The rotary table comprises an orientation transmission device. The pitching transmission device comprises a power arm and a data arm which are symmetrically arranged, the pitching transmission device is arranged on the turntable device, and a high-frequency box device used for installing an antenna array plane is arranged between the power arm and the data arm; the two sides of the high-frequency box device are rotationally connected with the corresponding power arm and data arm; an outer circulation channel and an inner circulation channel are arranged in the turntable device; the inner circulation channel is provided with a refrigerating system. A complete air cooling circulation channel is formed by combining the pitching transmission device and the high-frequency box device, independent heat dissipation of the rotary table is achieved, the heat dissipation requirements of different antenna array planes and related equipment in the high-frequency box can be met, and the applicability of the rotary table is improved.