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54results about How to "Low-temperature performance" patented technology

Constant temperature measurement-type micro humidity sensor and producing method thereof

The invention discloses a constant temperature measurement-type micro humidity sensor and a producing method thereof, relating to the sensor technology; the sensor consists of a humidity sensitive film capacitor and a pedestal, wherein at least one electrode in the lower electrode of the humidity sensitive film capacitor acts as a capacitance or impedance measuring electrode and a constant temperature-control heating electrode and works with a temperature sensor in the lower electrode under the control of an external circuit of the sensor to cause the micro humidity sensor to measure humidityat certain constant temperature. A thin supporting film for supporting the humidity sensitive film capacitor in the sensor has through holes or clearance structures, thereby reducing heat loss and causing the sensor to realize constant temperature measurement under relatively low power consumption. The micro humidity sensor is not affected by the environmental temperature, has small temperature coefficient and good low-temperature performance, realizes the humidity measurement at negative temperatures and has a volume smaller than 2mm*2mm*2mm. The invention is applied to daily life, industrial production, weather forecast, environment monitoring, aeronautics, astronautics and other fields.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI

Capacitor type nickel-hydrogen power battery and preparation method thereof

The invention belongs to the technical field of water-based power batteries, and particularly relates to a capacitive nickel-hydrogen power battery and a preparation method thereof. An electric core is formed by alternately stacking positive pole pieces, negative pole pieces and gel diaphragms and then being performed with shell installation, welding, top cover sealing, liquid injection and pulsepressure; the negative pole piece is prepared by following the steps of: dissolving lignin powder in alkali liquor at high speed, adding water-soluble polymer into alkali liquor, vacuum stirring to form solution, adding hydrogen storage alloy into solution, stirring uniformly, vacuum defoaming to obtain slurry, freeze drying to obtain precursor, performing vacuum carbonization on the precursor toprepare the negative pole piece; the alkali liquor is an aqueous solution of zinc oxide and sodium hydroxide. The method realizes the large-scale production of the positive pole sheet, negative pole sheet and gel diaphragm. The power battery has the advantages of low temperature performance and long service life. The times of charging and discharging of 1C in the SOC range of 20-80% is more than 20,000, which completely meets the requirements of electric automobiles, starting power supplies and the like; the invention also provides a preparation method thereof, which is safe in operation and green and environment-friendly.
Owner:包头昊明稀土新电源科技有限公司

Compound elastomer film with heat-insulating property and preparation method

ActiveCN109177414AGood environmental resistanceGood bonding performance and matching performanceSynthetic resin layered productsChemistryTransmittance
The invention relates to a compound elastomer film with a heat-insulating property and a preparation method and belongs to the technical field of a heat-insulating elastomer film for safety glass witha sandwich structure. The compound elastomer film with the heat-insulating property comprises a first layer of thermoplastic polyurethane elastomer film, a second layer of heat-insulating PET and a third layer of thermoplastic polyurethane elastomer film in turn; the thickness of the heat-insulating PET is controlled within 50-250mum; the heat-insulating function is achieved by preparing a near-infrared short wave obstructing nano-film on a PET substrate; the nano-film includes one or more of indium tin oxide, indium zinc oxide and silver; the thickness of the nano-film is controlled within 50-200mum; the first layer of thermoplastic polyurethane elastomer film, the second layer of heat-insulating PET and the third layer of thermoplastic polyurethane elastomer film are compounded and bonded through a heating and pressurizing method, so as to acquire the compound elastomer film with the heat-insulating property. The prepared glass with the sandwich structure has visible light transmittance reaching up to 60-80% and near-infrared transmittance not above 10%.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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