170results about How to "Reduce temperature rise rate" patented technology

A lithium ion secondary battery includes a positive electrode, a negative electrode, a porous insulating layer and a nonaqueous electrolyte. The porous insulating layer is provided between the positive electrode material mixture layer and the negative electrode material mixture layer and contains a material which does not have a shutdown function. The positive electrode is provided with a PTC layer extending substantially parallel to the positive electrode collector and the negative electrode is provided with a PTC layer extending substantially parallel to the negative electrode collector. Each of the PTC layers contains a material having a positive temperature coefficient of resistance.

The invention relates to the technical field of battery charging, in particular to a charging method of a lithium ion battery based on time and temperature. Polarization voltage limited maximum charging current is calculated based on lithium ion battery polarization characteristics, and under the constraint of the maximum charging current, charging temperature rise and charging time are considered comprehensively, genetic algorithm is employed to search the optimal charging current so as to balance the mutual contradictory objects of reducing charging time and lowering charging temperature rise. The result shows that the optimal charging current ensures charging rapidity, at the same time controls the polarization voltage and temperature rise of the charging process within an allowable range, and guarantees the charging capacity, charging efficiency and charging safety and battery life.

People can damage their medicines by taking them outside in hot or cold weather. On the other hand, some people need to carry their medicines with them wherever they go (even if the weather is extremely hot or cold). Specially constructed storage systems can protect medicines from damage due to hot and cold weather without requiring bulky structures or expensive components that consume electricity to regulate temperature.

The concrete hydration heat reducer is compounded with one kind of material selected from starch grafted polyacrylate, hydroxyl acetic acid-lactic acid copolymer, modified starch, polymethylamide, polymethyl formacrylate, polyalkyl acrylonitrile and ethyl cellulose, and through dissolving in water, reaction at 5-55 deg.c, water phase-solid phase separation after reaction to obtain the solid phase concrete hydration heat reducer. The material has molar ratio to water of 1 to 1-50. The product can reduce hydration heat of cement obviously, reduce the early adiabatic temperature raise of concrete, reduce temperature raise rate to lag the peak temperature time by about 6 days, make the concrete possess excellent heat stability, less initial stage temperature stress and less cracks.

The invention discloses a novel aging technology of a mesohigh voltage aluminum electrolytic capacitor. The novel aging technology adopts an aging mode of adding alternating current and the direct current and comprises the following steps that: 10+/-0.5 V alternating-current voltage can be applied for the preaging of a cathode first, the aging time can be 9-11 min, direct-current pulse current can be then applied for two anode and cathode ends of the capacitor for the direct-current pulse aging, the direct-current pulse aging can be subjected to section processing by a 12-stage power supply, wherein 1-8 stages of the power supply are used for normal-temperature aging, 9-12 stages of the power supply are used for high-temperature and constant-voltage aging, the direct-current pulse aging time is totally to be 180+/-5 min, the aging voltage value of the eighth stage is set to be 1.15-1.2 times than that of the rated voltage of the capacitor, the aging temperatures for the high-temperature and constant-voltage of the 9-12 stages are set to be 105+/-2 DEG C, and the aging voltage set value and the aging voltage value of the eighth stage are the same. By adopting the aging mode by adding the alternating current and the direct current, the effect of simultaneously repairing an anode oxidation film and a cathode oxidation film is reached, the problem that a whole energy-saving lamp is easily broken when an upper line of the energy-saving lamp is aged, the leakage of electricity of a product is reduced, the heat emission of the whole energy-saving lamp is reduced under a high-frequency condition, the ability of adapting to a high ripple wave of the aluminum electrolytic capacitor can be increased , and the reliability of the product is increased.

A lithium ion secondary battery includes a positive electrode, a negative electrode, a porous insulating layer and a nonaqueous electrolyte. The porous insulating layer is provided between the positive electrode and the negative electrode and contains a material which does not have a shutdown function. Each of the positive electrode and the negative electrode includes an expandable element.

The invention provides a drive circuit of a laser, which comprises a laser component and an LD drive; wherein, the laser component is connected with a bias current output terminal and a modulated current output terminal of the LD drive, and a bias current set terminal and a modulated current set terminal of the LD drive are connected with a drive current set chip which is connected with a singlechip MCU through an I<2>C communication interface; the singlechip is connected with a turn-off pin of the LD drive through an interface 2 of a second interface I/O to control drive and enable LDDDis, and is also connected with an external interface through a main I<2>C communication interface; the emission of the external interface enables TxDis and is connected with an interface 1 of a first interface I/O of the singlechip, the state of TxDis enabled by emission can be distinguished by the singlechip MCU through the interface 1 of the first interface I/O, and the state of the drive current set terminal of the drive current set chip is controlled according to the state of the TxDis enabled by emission. Therefore, wavelength shift of the laser is reduced to achieve the requirements for the stability of the wavelength of the laser when a DWDM system is applied.

The invention belongs to the technical field of charging of a lithium ion battery, and particularly relates to an optimized charging method of a vehicle-mounted energy storage lithium ion battery for rail transit. The optimized charging method comprises the steps of calculating maximum charging current and a charging cutoff voltage of a lithium ion battery within a full-life period according to cycle lifetime attenuation characteristic of the lithium ion battery; constructing an optimized charging target function under the constraint of the maximum charging current and the charging cutoff voltage by taking charging time reduction and battery charging temperature rising control as targets; and seeking an optimal charging current by a genetic algorithm so as to balance the two conflict targets of charging time reduction and the charging temperature rising reduction. A result shows that the optimal charging current is used for ensuring charging rapidness and simultaneously controlling a polarization voltage and the temperature rising during the charging process to be within allowable ranges, and the charging capacity, the charging efficiency, the charging safety and the battery lifetime are ensured.

The invention relates to the field of ultralow-temperature tests and in particular relates to an ultralow-temperature impact test device and a test method thereof. The device at least comprises a sample used as a test object, a temperature reduction assembly and an impact test assembly used for performing a sample impacting operation, wherein the surface of the sample is coated with an insulation layer. The device is simple in structure and convenient to realize, and can be used for remarkably reducing the supercooling temperature compensation value of a sample material to effectively guarantee the accuracy demand of a final impact test result. Meanwhile, the invention further provides the test method based on the ultralow-temperature impact test device, and the test method comprises the following steps: coating the surface of the sample with the insulation layer; performing temperature reducing and keeping operations on a preset temperature; performing a temperature return test on the sample; determining a lowest test temperature required to be set by a low-temperature device of a freezing machine; comparing impact tests; performing a conventional ultralow-temperature impact test; effectively and stably guaranteeing the operation demand of the device to further guarantee the accuracy of the test result.

The invention discloses a mass concrete hydration temperature rise inhibitor and a preparation method thereof. The inhibitor is composed of porous ceramsite, a phase change material and a starch-basedhydration heat regulation and control material; the particle size of the porous ceramsite is 1-25 mm, and the surface pore diameter of the porous ceramsite is 10-300 [mu] m; the phase change materialis one or a mixture of two of paraffin and barium hydroxide octahydrate in any proportion. By utilizing the characteristics of porous structure and relatively closed gaps of concrete, porous ceramsite is used as a carrier to load a phase change material and absorb heat generated by hydration of large-volume concrete, and a hydration heat regulation and control technology is combined to reduce thehydration heat release rate of cement, delay the temperature rise rate of the large-volume concrete and reduce the temperature peak of the large-volume concrete; meanwhile, the phase-change energy storage material adopted in the technology plays a role in heat compensation in the temperature drop stage of the mass concrete, the temperature difference between the inner surface and the outer surface of a concrete structure can be reduced, and the non-penetrating surface cracking phenomenon is reduced.

The invention discloses a slurry circulating pump RB control method of a thermal power generating unit. in allusion to abnormal flue-gas temperature rising of a boiler, during shutdown of all or part of slurry circulating pumps, the slurry circulating pumps RB are triggered and a spray system is started so as to realize matching control among unit coordinated control, accident spray commissioning and the slurry circulating pumps. By the slurry circulating pump RB mode, unit load is reduced while all accident sprays are all put into operation, and flue-gas temperature can fall to a safe range.

The invention discloses a hybrid vehicle energy recovery system, the hybrid vehicle energy recovery system comprises a master control module, a motor control module, a battery management system, a brake module, an information receiving module and a brake pedal stroke sensor; the invention further discloses a hybrid vehicle energy recovery method; the arranged brake pedal stroke sensor can monitorthe whole state of a brake pedal, particularly, an idle stroke section can be used to accurately pre-judge the sliding state of a vehicle actually driven by a user, the corresponding recovery power isoptimized, the fuel saving rate of the actual driving condition of the user is improved, the temperature rise of a battery under the high-speed sliding working condition is effectively reduced, the deviation of different feelings on the pedal at the same power, caused by manufacturing or assembling error, is further eliminated; by reducing the energy recovery power in the high-speed sliding process, the calorific value of the battery in the charging process of the high-frequency working condition is reduced, so that the speed of the temperature rise of the battery is reduced, the energy recovery power is increased when a driver intends to brake, and the better oil saving effect is guaranteed.

The invention relates to an electromagnetic induction pot comprising an inner pot and magnetic coils for heating, wherein the bottom of the inner pot is sleeved in the inner side of the coil seat, the electromagnetic coil is swirled on the outer side of the coil seat; the external of the electromagnetic coil is crimped with a coil guide plate. The coil seat has the similar shape as the bottom of the inner pot; one or more than one element rests are vertically arranged along the outer side of the coil seat and the electromagnetic coil is swirled in the element rest in intervals. The center of the bottom of the inner pot is connected with a temperature sensor with a reset and part of the electromagnetic coil is swirled around the center of the bottom of the inner port, that is, the outer side of the temperature sensor; the other part is swirled in the joint position between the bottom of the inner port and the inner walls and the electromagnetic coils of the two parts are intervately arranged. The coil guide plate takes the shape of the letter 'L', the middle part is transited in an arc shape and the coil guide plate is closely pressed on the electromagnetic coil; one end is connected with the center of the coil seat bottom and the other end is connected with a fixed seat on the coil seat. The electromagnetic induction pot has the advantages of simple and reasonable structure, lost production cost, high heating efficiency, flexible operation and long service life.

A solid state motor protector has a first PTC chip (positive temperature coefficient of resistivity) electrically connected in series relation with a second resistor having a generally fixed temperature coefficient of resistivity and mechanically coupled to the first resistor in close/direct thermal coupling. Another embodiment has a plate like isolator (52) formed with an opening receiving a polymer PTC chip (58) and having terminals (54, 56) which serve as fixed resistors. Yet another embodiment has an additional PTC resistor and a fixed resistor used in a motor reversing mechanism. Still another embodiment has a fixed resistor on either side of a PTC resistor for use in protecting the windings of a single phase motor. Another embodiment has a stack of polymer PTC resistor chips (82a–82d) with one chip serving as a voltage blocking chip and the other chip serving as fixed resistors.

The invention relates to a compound mouldproof additive for alfalfa hay, which is prepared from the following components in parts by mass: 10 to 30 parts of eucommia extract, 10 to 60 parts of allicin, 10 to 80 parts of ground cinnamon, 1.32 to 4 parts of potassium sorbate, 5.28 to 8 parts of sodium diacetate, and 26.4 to 40 parts of montmorillonite, when the compound mouldproof additive is used, the moisture content of the alfalfa hay is required to be 30 percent or below, 3 to 4.5kg of compound mouldproof additives are uniformly added into each ton of alfalfa hay. The compound mouldproof additive for the alfalfa hay can reduce the rising rate of temperature of bales in beginning of the storage of the alfalfa hay, reduce the temperature peak value of the bales, inhibit the growth of harmful microorganisms such as mould and the like, alfalfa can be safely stored for 60 days or more in the condition of high water content, the alfalfa hay is good in nutritional quality after being stored, and the plant source components have the effects of enhancing animal body immunity. The compound mouldproof additive for the alfalfa hay provided by the invention is simple in preparation method, low in cost, high in benefit, free from side effects, and more green and safe.

The invention discloses a refrigerator which comprises a refrigerator body, a door body, storage racks, an air flue cover plate, an evaporator and a fan, wherein a refrigerating chamber is arranged in the refrigerator body; the door body is mounted on the refrigerator body; the storage racks are arranged on walls of the refrigerating chamber, so as to separate the refrigerating chamber into a plurality of storage spaces; the air flue cover plate is arranged in the refrigerating chamber; an air outlet channel is formed between the air flue cover plate and a rear wall of the refrigerating chamber; a plurality of air outlets are arranged in the air flue cover plate at intervals along vertical direction; the air outlets are respectively and correspondingly communicated with the storage spaces; the evaporator is located in an air flue; the upper part of the evaporator is arranged on the rear wall of the refrigerating chamber; the lower part of the evaporator and the rear wall of the refrigerating chamber are separated for a preset distance; and the fan is arranged in the air flue and is used for blowing cold air in the air flue into the storage spaces. The refrigerator provided by the embodiment of the invention has the advantages of high refrigerating efficiency, low energy consumption, and the like.

The invention provides a relay which helps to solve the technical problem that temperature rise of a contact point in a conventional relay is quick, the contact point is easy to be damaged by an arc, and thus the service life of the contact point is reduced. A relay comprises a moving contact, an upper static contact and a lower static contact. The moving contact, the upper static contact and the lower static contact are respectively added with auxiliary contacts. The auxiliary contacts share half of an on-off current, so that the speed of temperature rise is allowed to be slow, the on-off current that the relay can bear wholly is twice as much as the original on-off current, contact loss is reduced, and on-off frequency of the relay is more than twice as much as the original on-off frequency.

The invention discloses a nitrogen-containing borate lubricating oil additive and a preparation method thereof and belongs to the technical field of lubricating oil. The preparation method comprises the following steps: firstly weighing raw materials according to the molar ratio of boric acid to cetanol to ethanol amine of (0.5-1.2):(0.5-3):(1-5); then adding the boric acid and the cetanol according to the molar ratio, adding a solvent, reacting for 0.8-1.2 hours at a temperature of 115-125 DEG C, then adding the ethanol amine according to the molar ratio, reacting for 4-6 hours and then refluxing. A nitrogen boron complex prepared by the invention instantaneously forms a ceramic boron nitride molecular film with super-strong wear resistance in a molecular form under the actions of temperature and pressure in a locomotive, has the efficacies of efficiently saving energy, reducing noise, protecting environment and prolonging the service life of the locomotive, is particular crucial for non-selectivity to metals and does not corrode a rubber sealing part; the additive can also efficiently slow down the rate of lubricating oil temperature rise and has more excellent performance in the high-temperature, high-speed and heavy-load locomotive; moreover, the raw materials are easy to obtain, the preparation method is simple, the cost is low, the hydrolytic stability is high, and the anti-wear and antifriction performances are good.

The invention discloses a heating ceramic kettle with an infrared heating film. The heating ceramic kettle comprises a high temperature-resistant ceramic kettle body, a heating base, a kettle controller shell, an upper power connection seat, a lower power connection seat and the heating film which performs heating by converting electric energy into far-infrared light; the outer edge of a heated bottom plate of the ceramic kettle body is fixedly connected with the heating base, the upper power connection seat is fixed in the heating base, and the lower power connection seat is fixed in the kettle controller shell; the heating film is uniformly sprayed to the outer surface of the heated bottom plate of the ceramic kettle body, the lower power connection seat conducts a current to the heating film through the upper power connection seat, the heated bottom plate of the ceramic kettle body is provided with a ring of a temperature insulation ditch which can reduce energy loss, the temperature insulation ditch is formed in the edge of the heating film in an enclosing mode, and the center position of the temperature insulation ditch is the same as the circle center position of the heated bottom plate. According to the heating ceramic kettle with the infrared heating film, energy can be saved by 30% through heating film heating compared with existing heating wire heating, no electromagnetic radiation exists, and energy conservation and health are saved.

The invention relates to an over-temperature prevention control method and system. The control method comprises following steps: determining whether a driver's demand for vehicle power meets a set high power demand condition; if the set high power demand condition is met, determining whether the temperature of the motor or its controller is greater than a first temperature set value; if the temperature is greater than the first temperature set value, controlling to reduce vehicle drive torque to limit the temperature of the motor or its controller. In the present invention, when the driver's demand for vehicle power is large, if the temperature of the motor or its controller is higher than the set value, the drive torque of the vehicle is controlled to be reduced, which effectively prevents the danger of burning the motor since the temperature of the motor and controller rises rapidly due to the driver's stepping on the accelerator or stepping on the accelerator for too long in the case of excessive temperature of the motor and controller.

A heat-insulating device for a freezer is provided, which utilizes the bottom of at least one of a plurality of plates arranged inside the freezer to form a space for storing cool-storage liquid. Therefore, a cool-storage zone is provided in the freezer, so as to increase the initial cooling rate of the freezer, reduce the start/stop frequency of a compressor of the freezer, ensure the uniform distribution of temperature inside the freezer, and reduce the rate of temperature rise during power failure or equipment failure.