23results about How to "Lower peak temperature" patented technology

The invention relates to the technical field of batteries, and provides a battery protection plate integrated with combustible gas regulation and control, a preparation method thereof and a battery module, and the battery protection plate integrated with combustible gas regulation and control comprises a porous heat insulation base material; the phase change hydrogel is adsorbed in the porous structure of the porous heat insulation base material; the aerogenesis flame retardant layer is arranged on the surface of at least one side of the porous heat insulation base material; and the packaging film is arranged on the outer sides of the aerogenesis flame retardant layer and the porous heat insulation base material and is used for packaging the porous heat insulation base material and the aerogenesis flame retardant layer. The battery protection plate integrated with combustible gas regulation and control can uniformly heat under the normal working condition of the battery, so that local overheating in the battery is avoided; when the battery is in thermal runaway, the temperature of the battery can be reduced and the detonation risk can be reduced.

The utility model relates to the technical field of mobile phone heat dissipation films, in particular to a high-heat-conduction mobile phone middle frame graphite heat dissipation film which comprises a heat dissipation film body, the heat dissipation film body sequentially comprises matte black single-faced adhesive tape, a high-heat-conduction graphite layer and double-faced adhesive tape from top to bottom, the high-heat-conduction graphite layer is formed by stacking low-temperature carbonization layers and is 0.2 mm in thickness, and the high-heat-conduction graphite layer is formed by stacking low-temperature carbonization layers. The low-temperature carbonization layer is formed by graphene through low-temperature carbonization treatment, the heat conductivity coefficient reaches 2000-2100 W / M.K, energy consumption is reduced through low-temperature treatment, the production cost is indirectly reduced due to the low temperature requirement, the graphene is subjected to low-temperature carbonization treatment, the lattice defect density is reduced, and the stability of the heat conductivity coefficient is ensured; and meanwhile, the 0.2 mm high-thermal-conductivity graphite layer is formed by stacking the low-temperature carbonization layers, so that the occupied space of the heat dissipation film body in the middle frame is reduced.

The invention discloses a phase change heat transfer motor stator heat dissipation structure and a design method, and belongs to the technical field of motor heat management, the structure comprises a stator iron core, a copper wire winding and a flattening type phase change heat transfer device, the copper wire winding is arranged on the inner side of the stator iron core, and the flattening type phase change heat transfer device is arranged on the outer side of the stator iron core; the flattening type phase change heat transfer device is arranged in a groove, in contact with the stator core, in the radial interior of the copper wire winding. The invention further discloses a design method of the heat dissipation structure. By adopting the heat dissipation structure and the design method, the thermal control technology of the motor stator winding is researched and developed based on the phase change heat transfer device, and the purposes of greatly reducing the peak temperature of the motor, enhancing the temperature uniformity of the motor and realizing high-overload-multiple safe operation are achieved.

The invention discloses a reactor core for achieving 18-month circulation of a pressurized water reactor with the power exceeding 4000 MW and a loading method of the reactor core, the reactor core is composed of 177 groups of annular fuel assemblies, a 20-month refueling strategy is adopted in the first circulation, each assembly is divided into four areas to be loaded, the enrichment degrees of the assemblies in the four areas are 4.1%, 4.25%, 4.45% and 4.95% respectively, the number of the assemblies is 21, 64, 72 and 20 groups respectively, and the number of the assemblies in the four areas is 4.1%, 4.25%, 4.45% and 4.95% respectively. Placing 4.95% of the components in an outer area of the reactor core, and arranging 4.45% of the components, 4.25% of the components and 4.1% of the components in an inner area of the reactor core according to a checkerboard format; in the second cycle and the third cycle, a low-leakage refueling mode is adopted, and 2 / 3 of the reactor core, namely 108 groups of new assemblies, is loaded into the reactor core during refueling each time; and in the fourth cycle, balanced refueling is achieved, and the reactor core adopts a low-leakage refueling mode. According to the invention, after the annular fuel assembly is adopted by the pressurized water reactor consisting of 177 groups of fuel assemblies, the reactor core power is improved by 30% and reaches 4130MW compared with that when rod-shaped fuel is adopted, and the balance cycle life length still meets 18 months, so that the economical efficiency of the reactor core is obviously improved.

The utility model relates to the technical field of batteries, and discloses a battery pole group fixing structure and a battery, the battery pole group fixing structure comprises a shell, the inner side peripheral wall of the shell is enclosed to form a containing cavity, and the containing cavity is suitable for containing a pole group; an anti-explosion valve is arranged on the cover plate, and the anti-explosion valve and the pole group are arranged in a spaced mode in the first direction; the end plate is arranged on one side, facing the cover plate in the first direction, of the pole group; and the wrapping body wraps the end, close to the anti-explosion valve, of the end plate in the second direction, and the wrapping body is suitable for delaying and / or isolating heat transfer between the end plate and the pole group when the battery cell triggers thermal runaway. According to the battery pole group fixing structure provided by the utility model, the wrapping body can independently support the pole group and / or the wrapping body and the wrapped part of the end plate can simultaneously support the pole group, so that the pole group is prevented from moving towards the end plate along the first direction, the pole group is prevented from shielding the anti-explosion valve, the temperature rise speed of the battery cell due to thermal runaway is effectively delayed, and the safety of the battery cell is improved. The peak temperature of the battery cell is reduced, and the battery cell thermal runaway test passing rate is greatly improved.

The invention discloses a grate-rotary kiln pellet process biomass-hydrogen-based fuel gas composite heat supply method, which comprises the following operation steps A, B and C in a grate-rotary kiln pellet production process: A: mixing biomass charcoal and a pellet material for pelletizing; b, the biomass solid fuel and the hydrogen-based fuel gas are injected into the rotary kiln at the same time; and C, fuel gas and / or air are / is injected to the joint of the chain grate machine and the rotary kiln head so as to regulate and control the oxygen content and temperature of the flue gas of the second preheating section. According to the method, under the condition that normal production of the pellets is not affected, due to the fact that a renewable, clean and low-carbon fuel structure is fully adopted, the number of CO2 and gas pollutants generated by combustion of fossil fuel is remarkably reduced.

The invention discloses a reactor core of a pressurized water reactor with power of 4000 MW for 18 months of first circulation and a loading method of the reactor core, the reactor core is composed of 177 groups of annular fuel assemblies, the enrichment degree of each annular fuel assembly is 4.1%, 4.25% or 4.45%, the annular fuel assembly with the highest enrichment degree of 4.45% is arranged in an outer area of the reactor core, and 88 groups of annular fuel assemblies with the enrichment degree of 4.25% are arranged in total; 4.25% of annular fuel assemblies with relatively low enrichment degree and 4.1% of annular fuel assemblies with low enrichment degree are arranged in the inner area of the reactor core according to a checkerboard format, 68 groups of annular fuel assemblies with the enrichment degree of 4.25% are arranged, and 21 groups of annular fuel assemblies with the enrichment degree of 4.1% are arranged. According to the invention, on the premise that the shape and size of the pressurized water reactor core composed of 177 groups of fuel assemblies are not changed, after the annular fuel assemblies are adopted, the power of the reactor core is improved by 25% and reaches 4000 MW compared with that of a pressurized water reactor core adopting rod-shaped fuel, and the first cycle life length reaches 18 months, so that the economical efficiency of the reactor core is obviously improved.

The utility model relates to the technical field of batteries, and discloses a cover plate structure and a battery, the cover plate structure comprises a cover plate, an end plate, a lower insulating part and an elastic part; the cover plate is suitable for being connected to an opening of a shell of the battery, and an anti-explosion valve is arranged on the cover plate; the end plate is suitable for being arranged in the shell and is located between the cover plate and the pole group in the shell; the lower insulating part is connected between the cover plate and the end plate; and the elastic piece is connected to the lower insulating piece and is suitable for being propped between the pole group and the cover plate when the battery is in thermal runaway. According to the cover plate structure, when the battery is in thermal runaway and insulation protection structures such as the end plate are melted, the elastic piece abuts against the position between the pole group and the cover plate, the pole group is effectively prevented from moving in the direction where the anti-explosion valve is located, the pole group is prevented from shielding the anti-explosion valve, and an exhaust channel communicated with the anti-explosion valve is always formed between the cover plate and the pole group.

The invention discloses a rice non-sticky control method in the heat preservation stage of a cooking utensil and an electric cooker, the cooking utensil completes rice cooking through a coating-free inner container, and the method comprises the steps that cooking is completed, and the cooking utensil is controlled to enter the heat preservation stage; acquiring bottom temperature data of an inner container of the cooking utensil, and controlling a heating device to intermittently heat the inner container according to the bottom temperature data and a preset value; obtaining the uncovering state of the cooking utensil, and if it is detected that the pot cover is opened, executing a first heat preservation stage after the pot cover is closed; if it is not detected that the pot cover is opened, a second heat preservation stage is executed; in the first heat preservation stage, the heating device is controlled at a first preset value to heat the liner; in the second heat preservation stage, the heating device is controlled at a second preset value to heat the inner container; the second preset value is greater than the first preset value. By means of the control method, the non-stick effect of the uncoated inner container can be improved.

The application discloses an optimization method of integrated micro-modules based on complex power distribution, and relates to the technical field of integrated circuit thermal management, comprising the following steps: constructing a power distribution characteristic matrix by multi-physical field coupling analysis based on a structured data set, and generating micro-channel geometric parameters by using a gradient descent algorithm; constructing a structure thermal conduction efficiency mapping model, combining the micro-channel geometric parameters to obtain flow channel cross-section thermal resistance characteristic change data, and outputting a thermal conduction efficiency optimization matrix; extracting thermal resistance distribution characteristics in the thermal conduction efficiency optimization matrix, combining the flow channel cross-section thermal resistance characteristic change data to generate a collaborative optimization parameter instruction; obtaining thermal power distribution characteristics by executing the collaborative optimization parameter instruction, calculating an equivalent thermal resistance gradient, and obtaining a heat dissipation efficiency regulation and control instruction through dynamic mapping. By constructing the structure thermal conduction efficiency mapping model, real-time prediction of the micro-channel geometric parameters to thermal performance is realized, the efficiency is improved, and the global performance optimization is ensured.

The application provides a kind of high efficiency DC-DC power module of power saving type for tractor, it is related to power module technical field, including substrate, DC-DC power module, top plate, air-cooled heat sink and at least one heat conducting piece.The application, by setting heat conducting piece between the heat generating element of DC-DC power module and top plate, the equivalent thermal conductivity of the heat conducting piece from first end (heat source end) to second end (top plate end) shows decreasing trend;It is realized that the equivalent thermal conductivity is high near the heat generating element, the heat can be quickly exported from heat source, avoid heat accumulation to cause element junction temperature too high;With the heat transfer along the heat conducting piece to top plate direction, the equivalent thermal conductivity gradually reduces, and the heat flow transmission capacity weakens, to make heat more dissipate through the side wall of heat conducting piece to the surrounding environment (especially the airflow driven by air-cooled heat sink).

The application discloses a low-density corrosion-resistant thin-gauge high-aluminum medium-manganese steel, and chemical components and mass percentages of the low-density corrosion-resistant thin-gauge high-aluminum medium-manganese steel include the following: C: 0.1-0.4%, Mn: 3-12%, Al: 2-5%, and the balance of Fe and inevitable impurities. The application has the advantages that a stirring friction processing method is used to introduce a microstructure feature of a phase and a grain size in a matrix in a gradient distribution into the medium-manganese steel, so that the surface modification purpose is achieved, and then the corrosion resistance is effectively improved.

The utility model relates to the technical field of batteries, in particular to a battery cell, which comprises a battery cell pole group, the end plate assembly is arranged at the end part of the battery cell pole group; the anti-explosion valve is arranged on the end plate assembly; the end plate assembly is provided with a mounting part, and the limiting assembly is arranged on the mounting part; the limiting assembly is arranged between the anti-explosion valve and the battery cell pole group; and the limiting assembly can limit the distance between the battery cell pole group and the anti-explosion valve. According to the battery cell provided by the invention, when the battery cell triggers thermal runaway, the positions of the battery cell pole groups and the anti-explosion valves arranged on the battery cell pole groups relative to the end plates can be effectively limited, so that the battery cell pole groups are prevented from shielding the anti-explosion valves, the exhaust and heat dissipation effects of the anti-explosion valves are effectively improved, the temperature rise speed of the battery cell due to thermal runaway can be effectively delayed, and the peak temperature is reduced; the passing rate of the thermal runaway test of the battery cell is greatly improved, and the safety performance of the battery cell and even the whole PACK pack is improved.

The invention relates to a system for cooling catalytically combusted exhaust gases of hydrocarbon-fueled internal combustion engines used in small power plants and power tools. An exhaust gas cooling system for cooling catalytically combusted exhaust gas in a small power plant is disclosed. The system includes a cooling air guide and a mixing chamber. The mixing chamber includes an intake end, an exhaust end, and at least one cooling inlet. A short length exhaust device including a catalytic converter is operably connected to the intake end of the mixing chamber and is operable to direct catalytically combusted exhaust through the intake end into the mixing chamber. A cooling air guide is operably connected to the at least one cooling inlet and is operable to direct cooling air through the at least one cooling inlet into the mixing chamber. The mixing chamber is operable to promote mixing of catalytically combusted exhaust gas and cooling air to reduce a peak temperature of the combined exhaust gas.

The present application relates to the technical field of diamond saw blade, and particularly relates to a matrix powder for diamond saw blade and a diamond saw blade. The matrix powder comprises, in mass percentage, metal elements, iron-based pre-alloy powder, high-thermal-conductivity micro powder, and inevitable impurities; wherein the metal elements are selected from at least one of Fe, Sn, Cu and Ni; the iron-based pre-alloy powder is selected from an iron-based pre-alloy powder containing Fe and at least two of Cu, Ni, Co, Sn and P; and the high-thermal-conductivity micro powder is selected from a copper-tin alloy or a tungsten-copper alloy. The diamond saw blade comprises a steel base and a diamond cutter head, the diamond cutter head comprises a working layer and a transition layer; the transition layer is made of the above-mentioned matrix powder, and the working layer is made of the above-mentioned matrix powder and diamond. By adopting the synergistic design of the multi-layer matrix structure and the high-thermal-conductivity micro powder material, the peak temperature of the local chip groove of the multi-layer structure is greatly reduced.

The utility model relates to the technical field of batteries, and discloses a cover plate structure and a battery, the cover plate structure comprises a cover plate, an end plate and an elastic member; the cover plate is suitable for being connected to an opening of a shell of the battery, and an anti-explosion valve is arranged on the cover plate; the end plate is connected with the cover plate, is suitable for being arranged in the shell and is positioned between the cover plate and the pole group in the shell; a containing groove is formed in the end plate, and a groove opening of the containing groove faces the cover plate; and the elastic piece is arranged in the accommodating groove and is suitable for being propped between the pole group and the cover plate when the battery is in thermal runaway. According to the cover plate structure, when the battery is in thermal runaway and insulation protection structures such as the end plate are melted, the elastic piece abuts against the position between the pole group and the cover plate, the pole group is effectively prevented from moving in the direction where the anti-explosion valve is located, the pole group is prevented from shielding the anti-explosion valve, and an exhaust channel communicated with the anti-explosion valve is always formed between the cover plate and the pole group.

The invention aims to provide a W-shaped boiler burner based on pulverized coal particle size separation, belongs to the technical field of pulverized coal combustion, and can solve the problems that coarse pulverized coal particles are located on the periphery of the burner and fine pulverized coal particles are located in the center due to airflow rotation inertia of the W-shaped boiler burner; and the problems of delayed pulverized coal ignition, low combustion efficiency, high NOx emission and the like are solved. A vertical downward injection type structure is adopted, and a cross deflection flow guide structure is arranged in the combustor, so that pulverized coal is finally distributed at a contraction nozzle of the combustor in the mode of'centralized injection of center coarse powder and coating of outer layer fine powder '. By means of the structure, fine pulverized coal can be preferentially ignited in a hearth with the low temperature to establish a stable high-temperature field, central coarse-particle pulverized coal is promoted to be completely burnt out, the burning stability of inferior coal and wide-particle-size pulverized coal is remarkably improved, and the loss of unburnt carbon and the generation amount of NOx are effectively reduced.

The utility model provides a battery cell cover plate, a battery cell and a battery cell module, and relates to the field of battery cell structures. The battery cell cover plate comprises a main body, lower plastic is arranged at the bottom of the main body, and a boss protruding in the direction away from the main body is formed on the lower plastic; the high-temperature-resistant part corresponds to the boss and is arranged on the outer wall of the boss, and a plurality of through holes are formed in the high-temperature-resistant part so that the lower plastic can make contact with the external space. A boss protruding towards the direction far away from the battery cell cover plate main body is formed on the lower plastic, and the limiting effect on the pole group can be realized through the boss; besides, the outer wall of the boss is provided with a corresponding high-temperature-resistant part, so that when the interior of the battery cell reaches the temperature at which the lower plastic made of the PP material can be melted, the high-temperature-resistant part cannot be melted so as to play a good role in fixing the pole group, and the pole group is further prevented from moving up and down.

This invention relates to the field of chemical mechanical polishing (CMP) pad technology, specifically to a highly hydrophilic and wear-resistant CMP polishing pad, its preparation method, and its application. The invention uses cyanosiloxane monomers as raw materials, preparing highly active carboxylate silsesquioxane powder through one-step alkaline hydrolysis, and achieving nanoscale uniform dispersion of this powder in polyurethane. After pre-treating the base fabric with an acid-base oscillating impregnation agent, the nanoscale uniformly dispersed slurry is coated onto the base fabric, and then solidified to obtain the target product. This invention solves the technical problems of difficulty in balancing hydrophilicity and wear resistance, and poor polishing uniformity in existing hydrophilic modification polishing pads. The polishing pad produced is used for wafer polishing, exhibiting less than 3% intra-wafer non-uniformity, fewer surface defects, and extended service life. The process of this invention is fully compatible with existing wet production lines for polyurethane polishing pads, requiring no additional equipment. The process is simplified, batch stability is strong, and industrial mass production is possible, adapting to the high-precision, low-defect polishing requirements of advanced semiconductor processes below 14nm.

The present invention discloses a low-nitrogen combustion device and a combustion boiler, belonging to the technical field of low-nitrogen combustion components, including a main air duct, one end of which is provided with an air outlet, a central gas pipe is provided therein, the central gas pipe is coaxial with the main air duct, and a flame stabilizing mechanism is provided on the central gas pipe; the central air duct is sleeved on the central gas pipe and is located outside the air outlet, the flame stabilizing mechanism is located in the inner cavity of the central air duct, and one end of the central gas pipe provided with a gas outlet extends out of the central air duct; a plurality of gas spray guns are provided, the plurality of gas spray guns are arranged around the central air duct, and in the axial direction of the main air duct, the distance between the gas nozzle of the gas spray gun and the end face of the end of the main air duct provided with the air outlet is greater than the distance between the flame stabilizing mechanism and the end face on the side away from the gas outlet. The combustion of the gas starts outside the air outlet, no flame is generated in the inner cavity of the main air duct, the heat of the gas combustion can be promptly dissipated into the furnace, the peak temperature of the flame is reduced, and the generation of thermal NOx is reduced.

The present disclosure provides a soft package battery, a battery device and a power utilization device. The soft package battery comprises a soft package battery core body and a shell. The soft package battery core body is arranged in the shell. The shell is provided with a weak area which melts or ruptures before other areas of the shell when the soft package battery core body has thermal runaway, so as to serve as a pressure relief structure of the soft package battery. Through the above structural design, the present disclosure can increase the area of the region where the shells of adjacent soft package batteries contact each other, greatly improve the heat conduction efficiency, and can regulate the temperature of the internal battery by heating or cooling the shell of the peripheral battery after grouping. The present disclosure can realize the directional spray valve of the soft package battery, and reduce the possibility of thermal runaway spreading between adjacent battery devices. By utilizing the good heat conduction performance of the shell itself, the heat dissipation can be accelerated, the peak temperature of the thermal runaway battery can be reduced, and the heat conduction to the rear battery can be accelerated, thereby reducing the heat absorption of the battery adjacent to the thermal runaway battery.

The application discloses a kind of chip thermal risk pre-judgment and active thermal management method and related equipment, including in training phase according to the first chip is collected to obtain time shift training sample according to prediction lead time, using time shift training sample to train thermal state prediction model, in prediction phase second chip is surface thermal map collection and obtains second surface thermal map sequence, second surface thermal map sequence is input to the thermal state prediction model and is handled to obtain thermal state prediction value, according to the thermal state prediction value, second chip is carried out thermal risk pre-judgment and active thermal management etc. Step.The application can output early warning result before future internal thermal risk occurs, and control action is executed in advance, therefore, can reduce internal temperature out-of-range times, reduce hotspot peak temperature, and relieve reliability risk caused by control action lag, can more accurately judge future internal thermal risk.The application is widely applied in chip thermal management technical field.

The invention discloses lead-free soldering paste and a soldering method thereof. The lead-free soldering paste comprises, by weight, 50-80 parts of first solder alloy, 20-50 parts of second solder alloy and 10-13 parts of scaling powder. The first solder alloy comprises Sn, Sb, Cu and Ag, and the mass ratio of Sn to Sb is 2-3; and the solder alloy II comprises more than 90 wt% of Sn. The welding method comprises the following steps that welding paste is applied between a substrate and an element to form an assembly, first reflow welding is carried out at the peak temperature of 290-300 DEG C, and the welding paste forms a welding connector; and then carrying out second reflow soldering at the peak temperature of 250-260 DEG C. The solder can meet the requirement for high strength of 260 DEG C or above, the welding reflow peak temperature is lower than 300 DEG C, the reflow peak temperature is reduced, the solder can be directly applied to a mainstream process, and a special production line does not need to be additionally arranged; and the multi-level backflow requirement of a device without high temperature resistance can be met.