61 results about "Cold climate" patented technology

Heat pump systems that include vapor injection feature are disclosed. Embodiments may include a heat pump system that has two tandem scroll compressors. Each compressor is paired with a control valve that regulates the flow of vapor to the respective compressor. Both the control valves are in fluid communication with a single or common source for vapor injection and to the controller. During operation, the controller dynamically determines how much vapor injection is needed for each of the compressors based on the operational data of the compressors and, optionally, ambient environment data. The controller then operates the two valves to ensure that the right amount of vapor is injected into each compressor.

This invention discloses a method, apparatus, device, and storage medium for testing the charging gun insulation function of an electric vehicle. The method involves immersing the electric vehicle in a predetermined low-temperature environment and charging it to a preset SOC range, causing the temperature of the electric vehicle's power battery to drop below a predetermined low-temperature threshold. While maintaining a physical connection between the charging gun and the electric vehicle, the method monitors the temperature change of the power battery, the output parameters of the charging equipment, and the SOC value of the power battery. When the battery temperature drops to the predetermined low-temperature threshold, the charging gun insulation function is triggered, and key parameters during the function's operation are recorded. Based on the changes in key parameters and the SOC value, the energy source of the charging gun insulation function is determined. This comprehensively verifies the reliability of the function's triggering conditions, temperature control performance, and exit logic, ensuring the normal operation of the electric vehicle's battery thermal management function in low-temperature environments and improving the safety and user experience in cold climates.

The invention discloses a few-crack durable first-grade highway pavement structure suitable for a seasonal frozen region, and belongs to the technical field of highway engineering. Comprising an upper surface layer, a middle surface layer, a stress absorption layer, a first cement stabilized macadam double-layer base layer, a second cement stabilized macadam double-layer base layer, a macadam hardcore and a roadbed. However, interlayer tensile strain is concentrated, base layer air shrinkage and reflection cracks are difficult to effectively restrain, and interlayer weakening is easily caused by construction and operation temperature gradient. And the problem that structural forms and parameter ranges considering crack resistance, rut resistance and water stability are incomplete under the conditions of cold weather and large traffic load due to the lack of a system solution of pavement layer combination, stress absorption and construction window coordination in a seasonal frozen area is solved.

The invention relates to a capsule type oxygen cabin for animal experiments, which adopts a modular structure, comprehensively considers the influence of multiple factors such as temperature, humidity, pressure and oxygen concentration, and also considers the influence of breathing oxygen consumption of experimental animals and the influence of a first / second accommodating part, and on the basis, the first / second accommodating part is centrally controlled through a touch screen; according to the method, the combination of multiple modes can be realized, so that the climate conditions of different regions can be accurately, efficiently and stably simulated, and accurate and scientific guidance can be provided for the research on'high reflection ', the work and life of personnel in high and cold climate regions and the pathology research of hospitals. Besides, the electrical parts are classified and placed in the first accommodating part, the second accommodating part, the touch screen and the bearing part, so that the cabin body can be transparent and visual, and the electrical parts in the first accommodating part and the second accommodating part are convenient to overhaul through detachable connection between the first partition plate and the second partition plate and the first accommodating part and between the first partition plate and the second partition plate and the second accommodating part.

The invention provides a rural domestic sewage treatment system of an enhanced biological filter, which sequentially comprises a pretreatment unit, a biological filter unit, a biological filter unit and a sewage treatment unit along the water flow direction, and the pretreatment unit comprises a grating, a regulating tank and a hydrolysis acidification tank; the core biological treatment unit is communicated with a water outlet of the pretreatment unit, and the core biological treatment unit is formed by connecting a multi-stage anaerobic biological filter and a baffling type micro-aeration biological filter in series; and the deep treatment unit is communicated with the water outlet of the core biological treatment unit and comprises an inclined plate sedimentation tank and a cloth filter tank. The invention aims to overcome the defects of the existing rural domestic sewage treatment technology, particularly a centralized treatment technology, in the aspects of coping with complex water quality and cold climate, decentralized management, cost control and the like. The enhanced biological filter sewage treatment system and the enhanced biological filter sewage treatment method provided by the invention can stably operate under various terrain and climate conditions (especially in high and cold areas and high altitude areas), and are high in treatment efficiency and low in construction and operation cost.

The invention belongs to the technical field of heating ventilation and air conditioning, and relates to an intelligent frost detection control method and system for an air source heat pump system, and the method comprises the steps: S1, collecting refrigerant pressure and temperature data at an inlet and an outlet of an evaporator, and collecting real-time operation condition parameters, environment parameters and meteorological prediction parameters in a future period; s2, preprocessing the collected data and constructing a multi-dimensional state feature vector; s3, obtaining a current frost layer grade index L1; s4, obtaining a frost layer grade trend index L2 in a future time period; s5, a comprehensive frost detection index Sdefault is obtained, and whether defrosting operation is carried out or not is judged based on the comprehensive frost detection index Sdefault; and S6, when defrosting operation needs to be conducted, a defrosting control strategy is dispatched from a preset defrosting strategy library based on the current frost layer grade index L1, the real-time operation working condition parameters and the environment parameters, and defrosting operation is conducted based on the dispatched defrosting control strategy. The annual energy efficiency and the operation reliability of the air source heat pump system under the wet and cold climate can be improved.

The petroleum distribution sampler comprises a driving device, a support is fixedly connected to the position, close to the bottom end, of the outer side of the driving device, a telescopic rotating rod is fixedly connected to the bottom end of the driving device, a collecting mechanism is movably connected to the bottom end of the telescopic rotating rod, a circular opening is formed in the center of the middle of the support, and a sleeve penetrates through the opening; a fixing ring frame is fixedly connected to the outer side of the top end of the sleeve, an air supply device is arranged on the left side of the fixing ring frame and fixedly connected with the support, the collecting mechanism comprises a collecting drill pipe, and the inner side of the top end of the collecting drill pipe is movably connected with the bottom end of a telescopic rotating rod. The invention relates to the technical field of oil exploitation, and has the characteristics that the practicability is high, fluid and non-fluid samples can be classified, and the influence of cold climate is relatively small.

This invention belongs to the field of adhesive technology. This invention provides a paste-like adhesive for exterior walls in extremely cold climates and its preparation method. The paste-like adhesive for exterior walls in extremely cold climates comprises, by weight, the following components: 35-37 parts polyacrylic acid emulsion, 14-16 parts quartz sand, 45-48 parts granulated blast furnace slag powder, 1.5-1.7 parts aluminum sulfate, 0.25-0.35 parts dispersant, and 2.5-3 parts methyl methacrylate-hydroxypropyl methylcellulose graft copolymer. This invention can effectively extend the construction window period, reducing the decrease in tensile bond strength of the prepared adhesive during construction.

The application discloses a kind of drinking water defluorination purification equipment, especially applicable to the treatment of high-fluorine groundwater in Inner Mongolia region.The equipment includes main tank body, heat preservation system, composite adsorption layer, water distribution system and regeneration system;Composite adsorption layer includes first activated alumina adsorption layer, modified zeolite molecular sieve layer and second activated alumina adsorption layer, forming gradient defluorination structure.Heat preservation system is built-in circulating liquid to cope with extremely cold climate in Inner Mongolia region in winter.Water distribution system includes upper water distributor and lower water distributor to ensure that raw water and defluorination medium are in full contact.Regeneration system is connected with main tank body through pipeline to realize in-situ regeneration of adsorption medium.The application solves the problem of low defluorination efficiency of existing equipment in low temperature environment through multilayer composite adsorption and cold resistance design, and the fluoride concentration of effluent is stably lower than 0.8 mg / L, which is suitable for decentralized water supply projects in rural and pastoral areas of Inner Mongolia.

The utility model relates to the technical field of irrigation, in particular to a directly-heated electric heating irrigation device which comprises a water inlet pipe, an electric heating body, a water outlet pipe and a control unit, a water inlet temperature sensor and a water flow switch are installed on the water inlet pipe, a water outlet temperature sensor is installed on the water outlet pipe, and a temperature control switch is installed on the electric heating body. The control unit is electrically connected with the electric heating body, the water inlet temperature sensor, the water flow switch, the water outlet temperature sensor and the temperature control switch, water flows through the water flow switch during irrigation, the water flow switch starts to act, and the control unit controls the electric heating body to start heating after detecting a water flow signal and controls the electric heating body to stop heating after water is cut off; the control unit adjusts the heating power of the electric heating body according to the water inlet temperature, the water outlet temperature and the water flow signals, the water outlet temperature is stabilized to be close to the set temperature, and therefore warming irrigation can be achieved in the cold climate, and the survival conditions of crops are improved.

The utility model discloses a pressure gauge with anti -freezing protection, including pressure gauge body, anti -freezing wrapping mechanism, connecting piece and control part, anti -freezing wrapping mechanism is set to the outer wall of pressure gauge body, and anti -freezing wrapping mechanism is used for the wrapping anti -freezing of pressure gauge body, connecting piece sets up in the both ends of anti -freezing wrapping mechanism, and connecting piece is used for the through connection of anti -freezing wrapping mechanism both ends, and control part sets up in one end of anti -freezing wrapping mechanism, and control part is with the through of connecting piece, and control part is used for the on -off control of anti -freezing wrapping mechanism. The utility model discloses through this anti -freezing wrapping mechanism provides the wrapping anti -freezing protection, and the inside of this anti -freezing wrapping mechanism adopts the through structure, when carrying out the anti -freezing protection, can heat the anti -freezing protection through the steam or hot water and thus under the setting of this scheme, the pressure gauge can use under the cold climate, guarantee the pressure gauge steady measurement under the cold climate.

A system such as a fueling station and a method for fueling hydrogen to vehicles are disclosed. The system includes a cryotank configured to store a liquid hydrogen, a cryo pump to provide a hydrogen stream with an elevated pressure, a first heat exchanger to accept a first portion of the hydrogen stream and exchange energy with ambient air to increase temperature, a by-pass line to accept a second portion of the hydrogen stream and combine it with the first portion of the hydrogen stream to provide a combined stream, a second heat exchanger to optionally provide heating to the combined stream in cold climates, and a dispenser to a dispense the hydrogen fuel of a desired pressure, a desired temperature, and a predetermined flow rate to a vehicle having an onboard storage system. The ratio of the compression energy input (Ws) to thermal management energy input (Qth) is greater than one.

The application discloses a control method for ARA equipment road surface load in the freezing and thawing period, which is as follows: 1, corresponding sensors are arranged on each structural layer of the asphalt pavement; 2, the temperature and humidity at different depths are studied in relation to the freezing and thawing time; 3, the strain of each layer and the deflection of the road mark are studied in relation to the freezing and thawing time; 4, an empirical model is established based on the evolution law of the mechanical response of the asphalt pavement under freezing and thawing; 5, the relationship between the independent variables in the empirical model and the pavement structure performance is analyzed to determine the related parameters in the empirical model; 6, the error of the empirical model is determined, the change of the mechanical response caused by the overload during the freezing period is summarized, the damage characteristics of the road surface caused by the winter load are determined according to the test and modeling results, and the load limitation in the freezing and thawing process in winter is proposed. The method can explore the change of the asphalt pavement structure performance during the freezing period, and provides a reference for the proposal of the dynamic load limitation range in the cold climate area.

The utility model discloses a hidden handle with a heating mechanism, which belongs to the technical field of automobile handles and comprises a handle mounting shell, mounting plates are fixedly mounted on the left side and the right side of the handle mounting shell, mounting holes are formed in the mounting plates, a handle groove is formed in the front side of the handle mounting shell, and a heating mechanism is arranged in the handle groove. A driving cavity is formed in the handle mounting shell, a handlebar is arranged in the handle groove, a plurality of sliding columns are fixedly mounted on the back face of the handlebar, and the sliding columns slidably penetrate through the handle mounting shell and extend into the driving cavity; the heating wire net is arranged to be matched with the air guide fan for use, in the cold climate environment, the heating wire net works to generate heat to be matched with blowing of the air guide fan, hot air is blown to the handlebar through the heat conduction holes, and therefore the handlebar can be preheated and heated, and the phenomenon that the handlebar is frozen in the low-temperature environment is effectively prevented; normal ejection of the handlebar in a low-temperature environment is guaranteed, and the protective net is used for isolating and protecting the air guide fan.

The utility model belongs to the technical field of car body corrosion prevention, and particularly relates to a car body coating structure used in low-temperature cold weather. The device comprises an electrophoresis layer which is coated on the inner and outer surfaces of a vehicle body; the floating coat is coated on the electrophoresis layer on the outer surface of the vehicle body; the finishing coat layer is coated on the floating coat layer; and the hydrophobic layer is at least coated on the finishing coat layer on the outer surface of the skirt edge of the vehicle body. The anti-corrosion device is used for solving the problem that the anti-corrosion effect of a vehicle body is poor in cold weather. The hydrophobic layer is sprayed on the outer side of the vehicle body skirt which is easy to contact with ice and snow outside the finishing coat layer, so that ice and snow are not easy to freeze when contacting with the hydrophobic layer, and even if the ice and an ice layer frozen on the surface of the hydrophobic coating are frozen, the ice and the ice layer are also easy to remove. A large amount of snow frozen on the outer skirt of the automobile body is reduced, and corrosion of a snow-melting agent to the skirt is reduced.

This invention proposes a dust suppression system suitable for cold climates, comprising a chemical tank, a water supply pipeline, a mixer, a liquid storage tank, an air compressor, an air storage tank, a foaming tank, and a spraying device. The foaming outlet of the foaming tank is connected to the inlet of the spraying device via a pipeline, and the spraying device is located in the area to be suppressed. The advantages are: the foaming tank uses a low-pressure foaming principle to produce foam, which is then sprayed through spray nozzles to areas prone to dust generation, thereby achieving dust suppression. Simultaneously, since the coal conveyor belt vibrates during operation, it can cause secondary dust generation; the foam can form a continuous "covering film" above the belt, thus providing a continuous dust suppression effect. Due to the poor fluidity of the foam, it will not affect the working environment. By installing a dust detection probe and a spray nozzle at each belt transfer point, individual control of each spray valve is achieved, allowing for optimal dust control with minimal chemical dosage.

The invention discloses a vehicle door dynamic airtight system based on an ion air curtain and thermoelectric coupling and a control method, and belongs to the technical field of vehicle airtight control and thermal management. The system comprises an ion wind curtain generator arranged on the inner side of a vehicle body threshold, a thermoelectric coupling barrier installed on the edge of a vehicle door inner plate, eddy current delay systems arranged on the inner sides of a B column and a C column, biological radar pre-judgment systems distributed inside and outside a vehicle door and a main controller. The door opening action of a passenger is recognized through the millimeter wave radar, the controller starts the eddy current system and the thermoelectric barrier in advance, and the ion air curtain is synchronously activated at the moment when the vehicle door is opened, so that triple barriers of the ion air curtain, a thermal boundary layer and a turbulent flow field are formed at a door opening, and cold air is actively prevented from entering a compartment. The system can adjust the voltage, the current and the wind speed in real time according to the environment temperature, the wind speed and the door opening angle, and low-energy-consumption and high-response intelligent airtight control is achieved. According to the invention, the riding comfort and the energy utilization efficiency of the vehicle in the cold climate are effectively improved.

This utility model relates to the field of power cord technology, specifically a power cord with cold-resistant function. It includes an outer sheath, with multiple mounting blocks fixedly installed on the periphery inside the outer sheath. An insulation layer is provided on the surface of each mounting block, and several limiting rings are fixedly installed on the surface of the insulation layer. A cold-resistant buffer layer is provided inside the insulation layer, and several power cords are arranged inside the cold-resistant buffer layer. An inner sheath is provided on the surface of each power cord. A connecting ring is fixedly installed at one end of the outer sheath, and a power connector is fixedly installed at one end of the connecting ring. This utility model, through its multi-layered structural design, significantly improves the power cord's cold resistance, crack resistance, and mechanical strength in low-temperature environments, making it suitable for power transmission needs in cold climates.

The application discloses a kind of urban river water quality evaluation systems suitable for cold climate, belong to water quality management field, the present application obtains river water quality index, weather data and snowmelt related data, through sub-basin and hydrological response unit division and combine snowmelt and rainfall process, the daily average runoff of hydrological response unit is evaluated, through snowmelt agent input, particulate matter deposition and hydrological response unit runoff process, the surface accumulation of pollutant and river flux are evaluated, through river surface water temperature information identification thermal anomaly area, and comparative analysis thermal anomaly area and the ice condition change characteristics of non-thermal anomaly area, through historical and real-time water quality data, meteorological data, pollutant river flux and thermal anomaly area change characteristics to the evaluation of dissolved oxygen and ion concentration in river, and compared with water quality threshold, to identify water quality anomaly in advance and issue early warning, improve the accuracy and reliability of urban river water quality evaluation of cold climate.

The invention belongs to the field of rock weathering research, and particularly relates to a device and a method for simulating rock particle weathering in a dry and cold climate environment in a cold and cold mountain area. Solar radiation and temperature rise are simulated through the ultraviolet radiation lamp and the bath heater lamp, the condensation pipe devices are arranged on the periphery of the interior of the box body, rapid cooling is achieved, moisture of rock mass can be dried by arranging the air heater, and high-frequency freezing and thawing and dry-wet cycle conditions of the high-altitude mountainous area are reproduced by combining multi-sensor monitoring such as the air temperature and the slope surface temperature. The water power system sprays water from the upper portion in a directional mode, scouring of rainfall or ice and snow melting water flow with different intensities on rock particles is achieved, and hydraulic erosion of rock is simulated. Rock body particles are turned over through the vibration device below the rock body, so that different faces of the rock body can be weathered, and fine particles are easily generated through weathering. Through multi-factor coupling simulation, parameter adjustment and real-time monitoring technologies, the device provides an experimental platform for the research on the weathering mechanism of the rock mass in the high-altitude mountainous area under the actions of radiation, freeze thawing, dryness, wetness, weak water power scouring and the like.

The CO2 refrigerating and heating system comprises a plurality of CO2 compressors which are arranged in parallel, a condenser, a liquid CO2 storage tank, a heat recovery heat exchanger, an expansion valve group and a refrigerating and heating device. The compressor compresses CO2 gas, the condenser condenses and cools the CO2 gas, the liquid storage tank stores liquid refrigerants, the heat recovery heat exchanger conducts supercooling treatment on CO2, the expansion valve set conducts throttling expansion, and the refrigerating and heating device achieves the cooling and heating functions. The system further comprises a solar heat collector which absorbs solar energy in winter to evaporate liquid CO2, and the energy utilization efficiency is improved. The parallel CO2 compressor is configured and integrated with a storage battery and a solar thermal collector multi-element energy system, and an artificial intelligence algorithm is combined to intelligently regulate and control thermodynamic cycle and valves, so that the system efficiently and stably operates in cold climate, the defrosting problem is effectively solved, peak load shifting utilization of energy is achieved, and the energy utilization efficiency is improved. And therefore, the purposes of comprehensively improving the heating and cooling reliability, adaptability and annual operation economy are achieved.

The invention belongs to the technical field of gum. The invention provides external wall paste gum used in extremely cold climate and a preparation method of the external wall paste gum used in extremely cold climate. Comprising the following components in parts by weight: 35 to 37 parts of polyacrylic emulsion, 14 to 16 parts of quartz sand, 45 to 48 parts of granulated blast furnace slag powder, 1.5 to 1.7 parts of aluminum sulfate, 0.25 to 0.35 part of dispersing agent and 2.5 to 3 parts of methyl methacrylate-hydroxypropyl methyl cellulose grafted copolymer. According to the invention, the construction window period can be effectively prolonged, and the reduction amplitude of the tensile adhesive strength of the prepared gum in the construction process is reduced.

The application discloses a high-mineralization water desalination treatment system and method based on a strip mine dump, and utilizes the stripping material of the strip mine and the wide site of the dump to construct a freeze-thaw cycle desalination system, which is divided into a plurality of freeze-thaw sub-pools to improve the system processing capacity and arrangement flexibility; the high-mineralization water is changed into ice with lower salinity and water with higher salt content by fully utilizing the cold climate condition in the northern region in winter, and the ice is further melted into fresh water by using the waste heat of the mine area or seasonal temperature rise. The application utilizes the natural freeze-thaw cycle process to realize the quality and quantity utilization of the high-mineralization water, does not need to add chemical reagents and special equipment, has strong adaptability to water quality, low technical difficulty, small investment and low operation cost; the large-scale freeze-thaw pool is constructed by using the strip mine dump, has large capacity and high efficiency, does not need to newly occupy land, and has small influence on the ecological environment of the mine area.

The invention relates to the technical field of new energy, in particular to a hydrogen energy bus fuel cell stack suitable for a low-temperature environment, a power unit comprises a first support frame fixedly arranged on a shell, a hydrogen storage tank is fixedly arranged on the first support frame, a conveying pipe is fixedly arranged at the output end of the hydrogen storage tank, and a second support frame is fixedly arranged on the shell; a heating tank is fixedly arranged on the second supporting frame, the wheels arranged at the bottom end of the shell are used for driving the whole device to move, the rearview mirror arranged at the front end of the shell is convenient for a driver to observe the surrounding condition of the automobile body, and the power unit arranged in the shell can ensure that the automobile has stable power during running. When the bus is used in cold weather, hydrogen in the hydrogen storage tank can enter the reactor of the device through the conveying pipe, the heating tank can enable hot steam to pass through the heating pipe to keep gas in the conveying pipe in a good reaction state, the starting time in a low-temperature environment is shortened, and normal operation of the device is guaranteed.

The application discloses a kind of hot release repair materials suitable for cold area rush-repair engineering, hot release capsule and preparation method thereof, the hot release repair material suitable for cold area rush-repair engineering of the present application includes the following weight fraction proportion of raw materials: Portland cement 40-70 parts, sulphoaluminate cement 22.5-45 parts, gypsum 7.5-15 parts, hot release capsule 1-5 parts, quartz sand 97-103 parts, water 25.5-26.5 parts, high efficiency water reducing agent 0.25-0.35 parts.The present application incorporates the heat release amount, the heat release rate controllable hot release capsule, forms artificial controllable heat source in the interior of repair material matrix, solves the problem that cement-based repair material is influenced by low temperature under cold climate and strength develops slowly even produces frost injury etc., simultaneously is favorable to reduce cold area rush-repair engineering dependence external heat source, reduce high energy consumption and high carbon emission thus generated.

A solar-powered waste treatment system comprising a waste treatment vessel with interior chamber for processing waste material, and reflective elements configured to concentrate solar radiation onto the vessel to elevate internal temperature. The system includes adjustment means for optimizing solar radiation concentration based on varying conditions, thermal retention means for minimizing heat loss, and supplemental heating means providing thermal energy when solar radiation is insufficient. Temperature control means maintain predetermined conditions for optimal biological waste processing. The system features modular construction enabling disassembly and deployment in remote locations, with gas processing means treating generated gases before atmospheric release. Multiple processing chambers facilitate sequential waste treatment stages. The reflective elements comprise mirror panel assemblies with enhanced reflectivity coatings mounted on exterior surfaces and positioned to focus solar radiation onto predetermined heating zones, maintaining optimal temperatures for efficient waste decomposition in extreme environmental conditions including high-altitude and cold climate regions.

Disclosed in the present invention is a method for smart testing and automatic matching of a locally sourced material suited to severe cold climate in Northern China, comprising acquisition of basic site data, acquisition of a building case data set of a target site, construction of a standard model library of the target site, structural stability testing of standard building models, automatic matching of "building-material" climate suitability, and comparison and selection on a large holographic screen and output of building material information. In the method, by acquiring basic site data and data in an Inner Mongolia building case data set, constructing a standard model library of a target site, testing structural stability and climate suitability, and performing matching between building elements and building materials, thereby achieving suitability to the climate of Inner Mongolia.

The utility model provides a natural forage grass impurity cleaning device suitable for a high and cold climate area, which belongs to the technical field of screening equipment and comprises a frame body, a cleaning roller, a first conveyor and a second conveyor, the frame body is obliquely arranged, the cleaning roller is rotatably connected to the frame body, and the cleaning roller is used for screening and filtering forage grass and impurity mixtures; the first conveyor is connected to the frame body and located below the cleaning roller, and the first conveyor is used for receiving impurities screened and discharged from the interior of the cleaning roller and conveying the impurities in the length direction of the frame body so that the impurities can be stacked; the second conveyor is arranged on the side of the frame body and used for receiving the forage grass screened out from the end of the cleaning roller and conveying the forage grass so that the forage grass can be stacked. According to the natural forage grass impurity cleaning device suitable for the high and cold climate area, two conveyors need to be arranged, screened forage grass is stacked, meanwhile, cleaned soil and other impurities can be arranged nearby to be stacked, and the sorting efficiency is improved.

The invention relates to a heavy metal stabilizing agent simultaneously suitable for normal temperature and freeze-thaw environments and application, the stabilizing agent comprises 50%-70% of modified blast furnace slag, 10%-20% of charcoal and 10%-40% of limestone, and the sum of the mass percentages of all the raw materials is 100%. According to the stabilizing agent for the Cd, Pb and Zn combined polluted soil, the stabilizing efficiency is obvious compared with the remediation effect of a single stabilizing agent. The method has the advantages of good stabilization effect, cheap materials and no secondary pollution, the stabilization rate is also improved under freezing and thawing cycles, and the method can be used in the field of remediation of multi-metal compound polluted soil such as Cd, Pb and Zn, especially in regions where the climate is cold and freezing and thawing cycles occur repeatedly.

A method and system for low-temperature protection of a battery cell, which method and system relate to the technical field of automobile batteries. The method comprises: acquiring first sensing information of a vehicle every a first time period, wherein the first sensing information comprises the temperature of a battery cell, the duration of the first time period is positively correlated with the temperature of the battery cell and / or a first ambient temperature of the vehicle, and the first ambient temperature is used for indicating the temperature of the environment where the vehicle is located; and on the basis of the first sensing information, heating the battery cell. On the basis of the method, a battery cell can be monitored at relatively low energy consumption overheads, and when the battery cell is at risk of failure to discharge due to a low temperature, the battery cell is heated in a timely manner, so as to ensure that the battery cell can also operate normally to provide electrical energy for a vehicle even in cold climates.