1063results about How to "Avoid explosion" patented technology

The invention discloses a chemical gas leakage detection management method and system, and relates to the technical field of chemical gas leakage detection, and the method comprises the following steps: determining a detection region and the gas type and characteristics of the detection region, collecting the environment data of the chemical detection region, constructing an environment parameter database, carrying out the preprocessing according to the collected environment data, and obtaining a detection result. The method comprises the following steps: analyzing environmental data influencing gas leakage detection to obtain an environmental data analysis sequence table, configuring detection equipment according to the environmental data analysis sequence table, establishing a data acquisition system and an anomaly detection mechanism, and collecting detection data and identifying anomaly detection data in the detection data by utilizing the detection equipment. The gas concentration in the environment is monitored in real time, abnormal conditions are rapidly detected, an alarm mechanism is triggered, a leakage source is found and controlled in time, the emission amount of harmful gas is reduced, the time difference from leakage occurrence to detection is shortened, and safety accidents such as fire disasters and explosions are effectively prevented.

The invention belongs to the technical field of battery maintenance, and discloses a new energy automobile battery maintenance device which comprises a base, mounting grooves are formed in the upper surface of the base at equal intervals, clamping grooves are symmetrically formed in the front side and the rear side of the bottom of each mounting groove, a mounting shell is fixedly mounted on the upper surface of the base, and a plurality of guide grooves are formed in the upper surface of the mounting shell at equal intervals. Side grooves are symmetrically formed in the side faces of the guide groove, and electric heating plates fixedly sleeve the middles of the front side groove and the rear side groove. Mercury in the telescopic sleeve is heated to expand, so that the expanded mercury in the telescopic sleeve pushes the telescopic end of the telescopic sleeve to move upwards, the telescopic end of the telescopic sleeve drives the heat conducting plate to move upwards through the electric plate to be in contact with the heat dissipation plate, and at the moment, the heat dissipation plate dissipates heat of the battery through the sleeve column and the heat conducting plate; therefore, the problems that the charging and discharging efficiency of the battery is low and the service life is shortened when the battery works in a high-temperature or low-temperature environment are solved.

The embodiment of the invention provides a heat management device and an energy storage cabinet. The heat management device is used for the energy storage cabinet and comprises a first loop unit, a second loop unit, a multi-way valve and a phase change heat storage unit. The first loop unit comprises a first heat exchange pipeline, and the first heat exchange pipeline is used for exchanging heat with an energy storage device of the energy storage cabinet; the second loop unit comprises a second heat exchange pipeline; the phase change heat storage unit comprises a first flow channel, a second flow channel and a phase change part, the first flow channel can selectively communicate with the first heat exchange pipeline through a multi-way valve, and the second flow channel directly communicates with the second heat exchange pipeline; the phase change part is in heat conduction contact with the first flow channel and the second flow channel. The heat management device is arranged, and the phase change part is in heat conduction contact with the flow channel, so that efficient heat exchange between the phase change material and the cooling liquid in the flow channel can be realized. When the temperature of the cooling liquid in the flow channel rises, the phase change material absorbs heat and generates phase change, and vice versa, so that the temperature fluctuation in the flow channel is balanced.

The invention provides an OFDM signal receiving and processing system and method suitable for an NAVDAT system. According to the method, the characteristics that NAVDAT system signals have synchronous headers, pilot frequencies and the like are fully considered, firstly, the synchronous headers are used for carrying out correlation operation on received data to search a frame starting point, and a signal frame to be demodulated and decoded is obtained in combination with a constant false alarm detection algorithm; and subsequently, carrying out symbol synchronization to determine the FFT window position. Secondly, in combination with a discrete pilot signal, estimating an integral multiple frequency offset error, namely coarse synchronization, and further realizing estimation of a decimal multiple frequency offset error, namely fine synchronization, so as to realize frequency synchronization. And then, channel estimation is carried out by using the pilot signal and adopting a least square method to obtain the channel frequency response of the pilot, the frequency response of the complete signal is obtained through interpolation, and the rough estimation result is further processed through the designed RCAFCN network to obtain accurate channel estimation, so that the original OFDM signal is recovered. And finally, extracting a data part in the OFDM signal according to a frame structure, realizing soft demodulation through a log-likelihood ratio mode, decoding data of a signaling part by using a polarization code, and decoding data of a service part by using a low-density parity check code, thereby realizing complete demodulation and decoding. The method provided by the invention can effectively reduce inter-symbol interference and inter-carrier interference existing in OFDM signals, compensate channel distortion, reduce noise influence, improve decoding precision, improve communication quality, realize optimization of NAVDAT system baseband processing, and guarantee sailing safety of ships on the sea by combining with an existing marine broadcast system.

The invention relates to the technical field of energy storage system anomaly detection, and particularly discloses an abnormal state detection method for a liquid-cooled energy storage system, and the method comprises the steps: analyzing the environment where the liquid-cooled energy storage system is located, obtaining the feature value of the environment, analyzing the use state of a cooling system of the liquid-cooled energy storage system, and obtaining the feature value of the environment; judging whether the cooling system is abnormal or not and determining a cooling threshold value of the liquid-cooled energy storage system, analyzing an actual operation state of the liquid-cooled energy storage system, judging whether the liquid-cooled energy storage system is abnormal or not and performing abnormal detection on a battery unit of the liquid-cooled energy storage system, and determining an overheating detection abnormal level of the battery unit; the problem that traditional liquid cooling system anomaly detection depends on a fixed rule or a preset threshold value and lacks intelligent data processing and self-adaptive adjustment capability is solved, the intelligent level of system operation is improved, and the stability and safety of the system are further improved.

The invention discloses an ablation-resistant long-fiber reinforced nylon material for a battery pack, and relates to the technical field of nylon materials, the ablation-resistant long-fiber reinforced nylon material comprises the following raw material components by weight: 60-80 parts of nylon resin powder, 30-50 parts of a long-fiber reinforced material, 10-18 parts of aluminum diethylhypophosphite master batch, 8-15 parts of bromine-antimony composite master batch, 3-7 parts of montmorillonite, 12-20 parts of aluminum hydroxide, and 2-6 parts of nano-silica. The composite material is prepared from the following components in parts by weight: 1-4 parts of carbon nanotubes, 0.5-1.2 parts of an antioxidant I, 0.3-0.8 part of a lubricant I, 2-5 parts of a compatilizer, 0.1-0.4 part of a nucleating agent and 0.2-0.6 part of an anti-ultraviolet agent. By adding the diethyl aluminum hypophosphite master batch, the flame retardant property of the nylon material is improved, the processability of the nylon material is improved, the ablation resistance of the nylon material is improved, and the problems of insufficient flame retardant property, poor processability and poor ablation resistance of the nylon material can be solved.

The invention discloses a three-dimensional human body posture estimation method and system based on machine learning. The method comprises the following steps: constructing a posture estimation data set; training and optimizing network parameters of the feature extraction model, the feature dimension reduction model and the regression model; and extracting a feature vector of the target image by using the feature extraction model, performing feature dimension reduction by using the feature dimension reduction model, and finally inputting the feature vector after dimension reduction into the regression model to predict the three-dimensional coordinates of each key point of the human body. According to the method, the generative adversarial network based on two-stage enhancement is used for data expansion, so that the generalization ability of the model can be improved; network parameters of the feature extraction model are optimized by adopting a neural network parameter optimization algorithm based on a fusion phenomenon, so that the problem of gradient disappearance or explosion is avoided; a sparse self-expression layer is introduced between an encoder and a decoder, so that the correlation between features is reduced; and the prediction strategy of the regression model is adjusted by adopting a reverse reinforcement learning mechanism, so that the prediction accuracy is remarkably improved.

The utility model discloses an explosion-proof valve and a battery, the explosion-proof valve comprises a body, the body is provided with a nick and a buffer groove, and the nick and the buffer groove are both runway-shaped; the nick comprises a deep groove section and a shallow groove section, the depth of the shallow groove section is D, the distance between the bottom wall of the shallow groove section and the bottom wall of the body is T1, and the distance between the bottom wall of the deep groove section and the bottom wall of the body is T2; the distance between the bottom wall of the buffer groove and the bottom wall of the body is T3; wherein D is greater than 0, T3 is greater than T2, and T1 is greater than T2. According to the anti-explosion valve disclosed by the utility model, the buffer groove is arranged, so that the stress borne by the nick can be greatly reduced under the working conditions of battery cell production, pack assembly and whole vehicle vibration, and the fatigue cracking failure caused by overlarge stress borne by the nick is prevented; the nick is in a runway shape and comprises the deep groove section and the shallow groove section, and the depth of the shallow groove section is not zero, so that the set opening pressure of the anti-explosion valve can be effectively reduced while the manufacturing cost is reduced.

The invention relates to a perfluoro wide-temperature electrolyte for a lithium battery and application thereof, the wide-temperature electrolyte comprises a lithium salt, an additive and a plurality of perfluoro mixed solvents, the electrolyte capable of stably working in a wide temperature range (-80-80 DEG C) is successfully constructed, and the excellent electrochemical performance of the lithium battery at the wide temperature is realized. The electrolyte additive disclosed by the invention mainly comprises one or more of hexafluoroisopropoxy cyclotriphosphazene, 3-(2, 2, 2-trifluoroethoxy) propionitrile, 3-(2, 2, 2-trifluoroethoxy) butyronitrile, 3, 4-fluoroethylene sulfate and 4-trifluoromethyl-ethylene sulfate, and the fluorine-containing additive is good in flame retardant effect, moderate in viscosity, good in system compatibility, good in corrosion resistance and good in corrosion resistance. And a protective film can be formed on the surface of the positive electrode of the lithium battery, so that the high-pressure and high-temperature cycle performance of the battery is improved, the electrochemical performance of the battery is not influenced at all, the self-extinguishing time of the electrolyte is obviously shortened, the flame retardant property and the conductivity are excellent, the overcharge resistance of the lithium ion battery is also obviously improved, and the safety performance of the battery is improved.

The invention discloses a simulation sample generation method, system equipment and a medium, which are used for constructing a training sample set of a dynamic safety and stability evaluation model. The method comprises the following steps: acquiring a historical data set of a power grid within a preset time range, and constructing data of the same power system and the same time in the historical data set into a historical scene; constructing a WGAN-GP initial model, and training a generator and a discriminator of the WGAN-GP initial model by using a historical scene; adopting the trained WGAN-GP model to generate a simulation scene; inputting the simulation scene into a preset power flow model to obtain power system operation parameters for realizing the simulation scene; abnormal scene control verification and sparsity verification are carried out on the power system operation parameters of the simulation scene; and taking a plurality of simulation scenes passing the abnormal scene control verification and the sparsity verification as simulation samples to obtain a simulation sample set.

The utility model discloses a dustproof heat dissipation type LED mining lamp which comprises a miner lamp body, heat dissipation fins are arranged on the upper surface of the miner lamp body, a fixing box is fixedly connected to the outer surface of the miner lamp body, a motor is fixedly connected to the top inner wall of the fixing box, the output end of the motor is fixedly connected with a rotating shaft, and the rotating shaft is fixedly connected with a power source. The outer surface of the rotating shaft is fixedly connected with a fan, and the inner surface of the fixing box is fixedly connected with an air pipe. Heat generated by the miner lamp body is effectively dissipated out in time through the cooling fins, the motor, the rotating shaft, the fan and the filter screen, so that the temperature of the miner lamp body in the using process is kept within a safe range, the miner lamp body is prevented from being damaged or exploded at a high temperature, the filter screen can also prevent external dust from entering the fixing box, and the miner lamp is convenient to use. And the miner lamp body can be effectively kept clean under the cooperation of the air pipe and the spray head, so that the stability of the lighting effect is ensured, and the safe operation of miners in a well is ensured.

The invention relates to the technical field of battery heat dissipation devices, and discloses a battery heat dissipation method, a battery heat dissipation device and a battery pack, the battery heat dissipation device comprises a shell, a sealing cover is arranged on the inner wall of the shell, and a water cooling plate is fixedly assembled at the top of the sealing cover. By means of the shell, the sealing cover, the water cooling plate and the fan structure, in the operation process of the device, when the temperature of the body rises rapidly due to rapid rising, air pressure can be increased through the internal temperature, a piston is pushed to move, a second reset spring is compressed, and the space where one body is located is communicated with the space where the other body is located; meanwhile, a water cooling plate is controlled to operate through a controller, energy loss caused by continuous operation of water cooling in the normal operation state of the body is prevented from being increased, a movable plate is pushed to conduct bump detection operation on the body in cooperation with movement of a piston, and then the operation temperature of the body is accurately monitored, and the bump condition of the body is detected; therefore, a user can maintain the device and the body in time.

The utility model discloses a connecting structure of a cover plate and a cathode collector plate and a cylindrical battery, the cover plate is provided with a micro boss which slightly protrudes towards the inside of the battery, the top end of the micro boss is a platform, the middle part of the cathode collector plate is provided with an annular second nick, and the platform is welded with the inner side area of the second nick. In the application, the cover plate is provided with a structure slightly protruding towards the inside of the battery, the top end of the slightly-protruding structure is provided with a plane platform, the cover plate is externally welded with the inner ring of the collector plate through the plane platform, the inner ring of the collector plate is provided with a circle of nicks, and the welding area of the cover plate and the collector plate is in the nicks, so that when the internal pressure of the battery exceeds a certain value, the slightly-protruding surface of the cover plate rotates reversely, and the nick weak area of the collector plate is torn; therefore, the positive electrode and the negative electrode of the battery are disconnected, and battery explosion caused by external short circuit is avoided.

The invention discloses a vehicle-mounted LNG cylinder external supercharging device, and relates to the technical field of vehicle-mounted LNG cylinders, the vehicle-mounted LNG cylinder external supercharging device comprises a mounting plate, a cover plate is rotatably mounted at the top of the mounting plate, a supercharging device is fixedly mounted at the rear part of the mounting plate, a gas cylinder is arranged at the top of the mounting plate, and the gas cylinder is fixedly mounted at the rear part of the mounting plate. A gas inlet is fixedly formed in the left side of the gas cylinder, a valve is fixedly mounted on the circumferential surface of the gas inlet, a protection device is arranged at the top of the mounting plate, a leakage-proof device is arranged at the top of the mounting plate, and a connecting device is arranged at the top of the mounting plate. According to the device, a gas cylinder is placed on the top of the mounting plate, the cover plate is rotated downwards, the cover plate is rotated downwards to make contact with the inclined face of the top of the spring bolt, the spring bolt is stressed to retract into the switch box, the cover plate continues to be rotated downwards, when the spring bolt makes contact with the pressing block, the spring bolt stretches out under the elastic force of the third elastic piece, the spring bolt limits the cover plate, and the cover plate is prevented from being in the operation process of the device.

The invention provides a front-end flue gas isolation and discharge device for lithium ion battery thermal runaway exhaust, and belongs to the technical field of lithium ion batteries, the front-end flue gas isolation and discharge device for lithium ion battery thermal runaway exhaust comprises a fixed support, a silica gel ring, a thermal insulation layer, a cushioning layer, a flue and a piezoelectric film sensor, the fixed bracket is clamped between the positive pole and the negative pole of the lithium battery and is used for providing stable support for the installation of the device; the flue is arranged at the top of the fixing support and comprises a plurality of branch pipelines, and each branch pipeline is directly connected with the corresponding safety valve; the silica gel ring is filled between a branch pipeline of the flue and the fixed bracket; the device can solve the problem of diffusion of thermal runaway gas in a battery pack, and prevent heat transfer of unburned gas to a normal battery in a thermal runaway exhaust process and combustion heat transfer possibly generated after ignition, so that the spreading of thermal runaway in a module is delayed.

The invention relates to an electric vehicle charging control method and circuit, a charging device and a storage medium. The method comprises the following steps: detecting whether the charging device obtains direct-current input voltage; if the direct-current input voltage is obtained, the charging device is started to charge a vehicle battery; and carrying out charging monitoring on the charging process to obtain a charging current, and if the charging current reaches a preset current value, stopping charging by the charging device. Whether the DC input voltage exists or not is detected before charging, and then whether the charging device is started for charging or not is determined; real-time monitoring is carried out in the charging process, charging is cut off in time when the charging current reaches the preset current value, battery explosion, battery life damage and electric quantity waste caused by long-time charging after the battery is fully charged are avoided based on multi-layer charging protection, and the charging safety of the electric vehicle battery is improved.

The invention relates to the technical field of gas-solid phase catalytic reaction equipment, and discloses a gas-solid phase catalytic reactor, which comprises a reactor body and a plurality of catalyst bed layers arranged in the inner cavity of the reactor body, the plurality of catalyst bed layers are arranged at intervals along the flowing direction of reaction raw materials, the discharge side of each catalyst bed layer is provided with a quenching filler layer, and the discharge side of each catalyst bed layer is provided with a quenching filler layer. The quenching filler layer is arranged to be capable of quenching flames generated by the reaction raw materials; according to the invention, through a plurality of catalyst bed layers arranged at intervals, the intensity of gas-solid phase catalytic reaction is directly reduced, so that combustion explosion of combustible gas in reaction raw materials caused by release of excessive heat is avoided; the quenching filler layer is used for quenching flames possibly generated by reaction raw materials, so that combustible gas and oxygen can be subjected to a gas-solid phase catalytic reaction within the explosion limit, the reaction rate is increased, the reaction efficiency is improved, the economic benefits are further improved, and the device has the advantages of being safe and reliable.

The invention discloses a refrigerant recovery device of refrigeration equipment, and relates to the technical field of refrigerant recovery, the refrigerant recovery device comprises a heat dissipation explosion-proof mechanism, the heat dissipation explosion-proof mechanism comprises an air inlet guide plate, the top end of the air inlet guide plate is fixedly connected with a heat dissipation bin, and the bottom end of the inner wall of the air inlet guide plate is fixedly connected with two sets of fans; a plurality of sets of discharging ports are formed in the side wall of the air inlet guide plate, a plurality of sets of containing grooves corresponding to the discharging ports are formed in the inner wall of the heat dissipation bin, and a plurality of sets of ventilation buffer grooves located outside the containing grooves are formed in the inner wall of the heat dissipation bin. By means of airflow and copper sheets, internal energy accumulated in the process that a refrigerant is compressed into the recycling tank is consumed, explosion caused by too high temperature of the recycling tank is avoided, and a ventilation buffer groove is located in a cavity in a heat dissipation bin and located in the outer walls of multiple sets of containing grooves, so that when collision occurs, the heat dissipation bin is prevented from being blocked. Impact force can be consumed through deformation of the ventilation buffer grooves, and the recovery tank is prevented from being damaged and broken.

The utility model discloses an automatic drilling and monitoring device of a coal mine drilling machine, which relates to the technical field of coal mine drilling and comprises a base, a machine body and drilling equipment, a round cylinder is arranged on a shell of the drilling equipment, a round hole is arranged on the inner bottom surface of the round cylinder, and a methane detector body is arranged in the round cylinder. Control equipment matched with the methane detector body is arranged on the front end surface of a shell of the machine body, and an alarm is mounted on the top surface of the shell of the machine body; through cooperative use of the methane detector body, the control equipment and the alarm, methane at the punching position can be conveniently detected, the phenomenon of explosion caused by too high methane content is avoided, and the safety of coal mining is improved.

The invention relates to a battery thermal runaway protection structure, the battery thermal runaway protection structure comprises a heat insulation part, an explosion-proof valve and a fire-retardant heat release part, and the fire-retardant heat release part is arranged and covers one side, deviating from a battery tray, of a battery cell group so as to prevent flame generated by the battery cell group from spreading towards a vehicle body chassis; the heat insulation part is arranged on the side, facing the fire-retardant heat release part, of the vehicle body chassis so as to prevent heat of flames from being transmitted to the vehicle body chassis, the heat insulation part and the fire-retardant heat release part are arranged at intervals to form an exhaust cavity, and the anti-explosion valve is used for exhausting gas in the exhaust cavity. According to the battery thermal runaway protection structure provided by the invention, the problem that the overall effect of an existing battery thermal runaway control scheme is poor is solved.

The invention relates to the technical field of water electrolysis hydrogen production, and provides a safety control method and control device of an alkaline electrolysis hydrogen production system and the hydrogen production system.The safety control method of the alkaline electrolysis hydrogen production system comprises the steps that the current-moment oxygen concentration and the current-moment hydrogen concentration of each alkaline electrolysis bath are obtained; and when the current oxygen concentration of at least one alkaline electrolytic cell is smaller than a first oxygen concentration threshold value or the current hydrogen concentration of at least one alkaline electrolytic cell is smaller than a first hydrogen concentration threshold value, the alkaline electrolytic hydrogen production system is controlled to stop running, and inert gas is injected into the hydrogen separator and the oxygen separator. By means of the arrangement, the gas concentration of the oxygen side outlet and the hydrogen side outlet of each alkaline electrolytic cell is monitored, the working condition of each alkaline electrolytic cell can be accurately known, and when the concentration exceeds the threshold value range, the hydrogen production system can be stopped, inert gas can be injected into the separator, and therefore the hydrogen production efficiency is improved. The hydrogen concentration in the oxygen separator and the oxygen concentration in the hydrogen separator are reduced, and explosion is effectively avoided.

The invention discloses a method for preserving a meat product based on a self-assembled multifunctional double-layer coating film, and belongs to the technical field of preservation of fresh agricultural products. The method for preserving the meat product based on the self-assembled multifunctional double-layer coating comprises the following steps: dissolving chitosan and glycerol in an acetic acid solution to obtain a chitosan solution; the preparation method comprises the following steps: dispersing citral and Tween 80 in water, and carrying out homogenization and ultrasonic treatment to obtain a citral nano-emulsion; uniformly mixing the chitosan solution and the citral nano-emulsion to obtain a citral nano-emulsion-chitosan solution; the preparation method comprises the following steps: dissolving vital gluten in an ethanol solution, extracting and centrifuging to obtain supernate, and adding glycerol to obtain an extract solution; according to the method, fresh meat products are soaked in a citral nanoemulsion-chitosan solution and drained, then soaked in an extract solution and drained, and placed in a self-sealing bag to be stored, and the shelf life of the meat products can be effectively prolonged through the method.

According to the energy storage device, the energy storage module and the electric equipment, smooth exhaust of the energy storage device can be guaranteed, it is guaranteed that an anti-explosion valve cannot be opened in time for pressure relief, and the safety of the energy storage device is improved. The energy storage device comprises a shell, an electrode assembly and a cover plate, the electrode assembly is contained in a containing cavity of the shell, the cover plate is installed on the shell and seals an opening of the shell, the cover plate comprises a main body part and a boss part, the main body part comprises a first surface and a second surface which are oppositely arranged, and the boss part is fixedly connected to the main body part and protrudes relative to the first surface; the boss part comprises a first surface deviating from the electrode assembly and a second surface arranged back to the first surface, the second surface is convexly provided with at least one first sub-bulge, the at least one first sub-bulge and the explosion-proof hole of the boss part are arranged at an interval, and the first sub-bulge and the explosion-proof hole of the boss part are arranged along the height direction of the energy storage device. The surface, facing the electrode assembly, of the at least one first sub-protrusion is located on the side, away from the first surface, of the second surface, and the at least one first sub-protrusion and the electrode assembly are oppositely arranged.

The invention discloses a safety control method for blast furnace top pressure, which is characterized in that the blast furnace top pressure is adjusted in three stages, and the blast furnace top pressures at different stages are respectively adjusted through a pressure adjusting valve, a blast furnace blower, a blast furnace blower and a blast furnace blow-off valve. According to the safety control method for the top pressure of the blast furnace, the top pressure of the blast furnace is adjusted in three stages by combining the characteristics of each adjustment path, during each stage of adjustment, the problem of pressure reduction of the top pressure of the blast furnace is considered, the problem of production of the blast furnace is also considered, and the top pressure of the blast furnace is finely controlled in a targeted manner from the two aspects of pressure reduction of the top pressure of the blast furnace and production of the blast furnace; on the premise that the top pressure of the blast furnace is safe and controllable, the production efficiency of the blast furnace is ensured to the greatest extent, and the overall production of the blast furnace is further ensured.

The invention provides a battery and engineering machinery. The battery includes a battery cell. The battery unit comprises a battery box body, a battery module and an anti-explosion valve. The battery case includes a bottom plate and a plurality of side plates extending in a circumferential direction of the bottom plate. A containing cavity is defined by the bottom plate and the side plates. The battery modules are arranged in the accommodating cavity, and each battery module comprises a plurality of single batteries; and at least one side plate in the plurality of side plates comprises a smoke exhaust cavity. The smoke exhaust cavity comprises an inner cavity, a flue hole formed in the cavity wall, close to one side of the containing cavity, of the smoke exhaust cavity, and a smoke exhaust hole formed in the cavity wall, away from one side of the containing cavity, of the smoke exhaust cavity. The explosion-proof valve is mounted at the smoke exhaust hole, a flue is formed in an inner cavity of the smoke exhaust cavity, and when the battery module is subjected to thermal runaway, a high-temperature and high-pressure medium enters the flue through the flue hole and acts on the explosion-proof valve. According to the battery unit provided by the embodiment of the invention, the use safety of the battery is improved.

The invention discloses a polyarylether sulfone polymer and a preparation method and application thereof. The preparation method of the polyarylether sulfone polymer comprises the following steps: carrying out condensation polymerization on a bisphenol compound and a dihalogen diphenyl sulfone derivative, boiling, washing and drying to obtain polyarylether sulfone resin. According to the polyarylether sulphone resin disclosed by the invention, by introducing benzoyl, the conjugation degree of a main chain of a polymer is increased, and the rigidity of the main chain is improved, so that the polyarylether sulphone resin has good thermal stability and dimensional stability; meanwhile, the hydrophilicity of the resin is improved due to the increase of carbonyl. The development and utilization prospects in the fields of sewage treatment, gas separation, solid electrolyte, battery diaphragms and the like are very wide. The invention aims to provide a novel high-temperature-resistant hydrophilic polyarylether sulfone resin and a preparation method thereof, i.e., a benzoyl group is introduced into a main chain structure of polyarylether sulfone, so that the structural rigidity of a polymer is improved, and the hydrophilicity is increased.

The invention discloses a real-time pressure maintaining device of a new energy automobile tire and a control method. The real-time pressure maintaining device comprises a hub motor arranged in a hub, a tire pressure sensor arranged on the inner side of the tire and an inflating valve arranged on the inner side of the tire. A rotating shaft is arranged in the hub and connected with the rotating end of the hub motor. An air pump machine is arranged on the side wall of the rotating shaft, the output end of the air pump machine is connected with an electromagnetic regulating valve, and the electromagnetic regulating valve is connected with an inflating valve of a tire through a pipeline; one end of the rotating shaft is provided with a conductive slip ring, the conductive slip ring comprises a rotor arranged in the rotating shaft, one end of the rotor is electrically connected with the air pump machine, the other end of the rotor is sleeved with a rotor bearing, the outer end of the rotor bearing is provided with a stator end cover, the other end of the stator end cover is provided with a stator, and the stator is provided with a stator interface connected with a vehicle body power supply and a signal end. Real-time pressure maintaining of the tire can be achieved, the service life of the tire is prolonged, and the reliability of the tire is improved.

The invention provides a foam dust suppression material as well as a preparation method and application thereof. The foam dust suppression material comprises a foaming agent, a surfactant, a thickening agent, inorganic salt and a solvent; wherein the foaming agent comprises soybean protein isolate and / or collagen; the surfactant comprises an anionic surfactant and / or a nonionic surfactant; the inorganic salt comprises one or more of potassium sulfate, magnesium chloride, sodium sulfate and sodium chloride. According to the foam dust suppression material, specific components are adopted, all the components cooperate with one another, and the dust suppression material is high in foaming rate, good in stability, good in dust suppression effect, environmentally friendly, non-toxic to the human body, capable of protecting the health of workers and improving the comfort level of the working environment, low in cost and good in economic benefit and social benefit.

The utility model discloses a battery and electric equipment. The battery comprises a shell, a top cover and a battery cell, the shell comprises a bottom plate; the battery cell comprises a first pole piece, a second pole piece and a diaphragm which are laminated; a through mounting hole is formed in the bottom plate, and an anti-explosion valve is arranged in the mounting hole; on one side close to the top cover, the length of the diaphragm exceeding the second pole piece is L1; and on one side close to the bottom plate, the length of the diaphragm exceeding the second pole piece is L2, and L2 is less than L1. The explosion-proof valve is arranged on the bottom plate of the shell, and the part, exceeding the pole piece, of the diaphragm covers the end part of the pole piece on the side close to the explosion-proof valve (namely the side close to the bottom plate), so that the size L2, exceeding the second pole piece, of the diaphragm is controlled, L2 is ensured to be less than L1, and the length, exceeding the pole piece, of the diaphragm on the side close to the explosion-proof valve is not too long; and electrolyte and gas in the battery cell are more easily discharged from the bottom plate of the battery cell, so that the normal explosion of the explosion-proof valve and the pressure relief smoothness after explosion are ensured, and the explosion of the battery is avoided.

The invention belongs to the field of mining equipment and is a crushing coal mining equipment. The crushing coal mining equipment includes a chassis, a power chamber is provided in the lower side wall of the chassis, a power device is provided in the power chamber, and the power device is used to provide movement for the crushing coal mining equipment. A rotating table is provided on the upper side wall of the chassis, and a mining device is provided on the rotating table. The mining device is used to knock down and crush the coal that has been consolidated on the mine wall. The invention is simple to operate, and can remotely control coal mining without the need for personnel to operate on site, thereby protecting the lives of miners. It can be crushed in a wide range at multiple angles. A crushing device is installed in the shovel plate, and the collected coal can be further crushed for easy transportation. A cooling device is installed to avoid sparks and explosions during the crushing process. It is small in size and adopts a crawler structure. The overall structure is flat, which is conducive to working in narrow and rugged areas.