37results about How to "No effect on service life" patented technology

The invention discloses a low-temperature self-heating method for a lithium ion battery. The method comprises the steps of determining a frequency range in which the service life of the lithium ion battery cannot be affected, and selecting frequencies of charging and discharging pulses according to the range; setting a pulse current amplitude value selection basis under a selected charging and discharging mode, and calculating a charging current amplitude value Ic and a discharging current amplitude value Id; performing no-life-loss heating on the battery to be heated according to charging and discharging pulse signals of the determined frequencies and the amplitude values, wherein the inner resistance of the self-heated battery is greatly reduced, and the charging performance is greatly improved. According to the technical scheme, the low-temperature self-heating method has the effects of high self-heating speed, obvious low-temperature performance improvement and no influence on the service life of the battery.

The invention relates to a coater scraper apparatus. The apparatus comprises a scraper rack connected to a coater frame, a scarper having a cutting edge corresponding the coating roller of a coater is press-fitted on the scraper rack through a scraper press plate, a scraper rack adjusting shaft paralleling to the scraper rack is movably arranged on the coater frame in a penetrating mode, the scraper rack is connected with the scraper rack adjusting shaft and rotate around the scraper rack adjusting shaft, an adjusting worm gear is fixedly connected with the scraper rack adjusting shaft in a penetrating mode, the coater frame supports an adjusting worm having a driving cooperation with the adjusting worm gear, and the adjusting worm is connected with a hand wheel. The coater scraper apparatus accurately controls the adjustment between the scraper and the coating roller by adopting the scraper rack rotatablely far from or close to the coating roller and combining the scraper adjusting seat and a trimming cylinder, so the apparatus has the advantages of simple and compact structure, convenient and accurate adjustment, and effective ensure of the thickness of a glue solution on the coating roller for the uniform adjustment, and is suitable for the use of various different specification coating rollers and coating thicknesses.

The invention discloses a preheating system for reducing cold start emission of a motor vehicle and belongs to the technical field related to automobile engines and accessories thereof. The system mainly comprises an automobile small-sized burner, a heat exchanger which has a heat exchange relationship with pipelines such as a cooling water pipeline, an engine oil pipeline and a fuel supply pipeline, a pipeline loop, air inlet and exhaust and fuel supply pipelines of the automobile small-sized burner, a controller and the like. The preheating system for reducing cold start emission of the motor vehicle has the advantages that after the system is additionally installed, the emission of the motor vehicle during cold start is reduced, the engine heating process is shortened, the emission of harmful gas produced at the stage is reduced and the low-temperature wear of the engine is relieved.

The invention relates to a lightning protection device which comprises a shell and electrodes. Arc extinguishing chambers and at least two electrode chambers are formed in the shell, the inner-wall surface of each arc extinguishing chamber is round and smooth, the arc extinguishing chambers and the electrode chambers are arranged in a staggered manner, each arc extinguishing chamber is provided with two openings which are communicated with the two adjacent electrode chambers respectively, and each arc extinguishing chamber is communicated with the outside through an arc blowing passage; a lightning receiving face is arranged at each of two ends of each electrode, the electrodes are placed in the electrode chambers, the lightning receiving faces at the two ends of the electrodes are exposed in the arc extinguishing chambers on two sides of the electrode chambers at the same time to communicate the arc extinguishing chambers on the two sides, and a flashover gap is reserved between the two lightning receiving faces in each arc extinguishing chamber. The lightning protection device is free of charge accumulation effect, less prone to being broken down under identical gap voltage and capable of improving line insulation level; especially when being on a high-voltage power distribution line network, influence on power distribution quality caused by voltage fluctuation of the power distribution network due to great lowering of voltage of the power distribution network because of frequent misoperation discharging of the lightning protection device can be avoided.

The invention discloses a low-temperature self-heating method for a lithium-ion battery pack. Based on the principle of minimum impact on battery life, the optimal heating frequency range is determined taking into account both the aging state of the battery and the SOC; a series resonant inverter circuit is designed to explore the optimal control The strategy makes the inverter circuit output the sinusoidal AC current with target frequency and target amplitude on the battery side; the sinusoidal AC current output by the resonant inverter circuit is used to self-heat the battery pack at low temperature. As the battery temperature increases, the internal resistance of the battery gradually increases. The resonant inverter circuit adaptively increases the output current amplitude, increases the heating rate of the battery pack, and quickly raises the battery pack to the target temperature. The invention has the effects of fast self-heating rate of lithium-ion battery packs at low temperatures, obvious improvement in low-temperature performance, high self-heating efficiency, no influence on the service life of lithium-ion batteries, and good heating temperature uniformity, and will promote the use of electric vehicles in cold regions. Promote apps.

The invention discloses cold-type special molding sand for the integral casting of a large cast steel roller. The cold-type special molding sand is composed of the following compositions in parts by weight: 76% to 80% of quartz sand, 13% to 15% of clay, 1% to 2% of bentonite and the balance of water. When the special molding sand disclosed by the invention is used for the integral casting of a large cast steel roller having the diameter of Phi 900 to Phi 1400 and the amount of casting molten steel is 15 to 70 tons, the roller cold-type sanded thickness can be controlled within the range from 8mm to 9mm, thus improving the cold-type chilling capability of the roller body, enabling the columnar crystal thickness of the surface dense layer of the roller body to achieve about 150mm, reducing the chemical constitution aliquation of the outer layer, and enhancing the quality of the working layer of the roller body. The molding sand can prevent casting defects on roller surface excellently, such as sand adhesion and sand inclusion, results in smooth roller surface, improves the casting quality and the casting qualified rate of the large cast steel roller, and meets the demands on comprehensive application performances of the roller working layer of large section mills and strip mills, such as wear resistance, hot cracking resistance and accidence resistance.

The invention relates to a method for treating dinitro-diazophenol (DDNP) primary explosive production wastewater, belonging to the technical field of primary explosive sewage environmental-friendly treatment. The method is characterized by comprising the following steps: 1), carrying out classification: carrying out separation treatment on wastewater generated in the DDNP primary explosive production process according to the concentrations of poisonous compounds to obtain high-concentration wastewater and low-concentration wastewater, and respectively storing the high-concentration wastewater and the low-concentration wastewater; 2) carrying out high-concentration wastewater treatment: spraying the high-concentration wastewater on solid fuel, carrying out evaporation concentration, placing the solid fuel with less water after evaporation into a boiler, and incinerating the solid fuel with less water; 3) carrying out low-concentration wastewater treatment: introducing the low-concentration wastewater into a settling pond, settling the low-concentration wastewater, and utilizing the boiler to evaporate the supernatant liquor; and 4), periodically fishing out and cleaning the settling pond, blending solid precipitates in the settling pond into the solid fuel, and incinerating the solid precipitates and the solid fuel together. The method of the invention has the advantages that the wastewater treatment is safe and environmental-friendly, zero discharge of the DDNP primary explosive sewage is achieved, energy resources are saved, and the service life of production equipment is not influenced.

The invention provides an electrolyte stabilizing agent for an all-vanadium redox flow battery and a preparation method for the electrolyte stabilizing agent. The stabilizing agent comprises a carboxyl functional group and an amino functional group. The preparation method comprises the following steps of mixing maleic anhydride, acrylamide, glycerine and distilling water to obtain a mixed solution; taking out a part of the mixed solution for use; and stirring and heating the residual mixed solution, dropwise adding hydrogen peroxide and the mixed solution for use, and cooling to obtain the electrolyte stabilizing agent for the all-vanadium redox flow battery. The stabilizing agent can supply the carboxyl functional group which can generate chelating with pentavalent vanadium ions and the amino functional group which has an adsorption effect on the pentavalent vanadium ions, so that self polymerization of the pentavalent vanadium ions can be effectively prevented or restrained, generation of sediments can be prevented, and the stability of the electrolyte can be effectively improved.