38results about How to "Reduce the maximum temperature" patented technology

The utility model relates to a secondary bionic vein-shaped micro-channel cooling plate which comprises a plate body, a central main channel is arranged at the central position in the plate body, and an outlet auxiliary channel connected with the central main channel is respectively arranged at the edges of the two sides of the plate body; a plurality of first-stage bionic vein-shaped small channels are arranged between the central main channel and the two outlet auxiliary channels; and a plurality of second-stage bionic vein-shaped micro-channels are arranged on the two sides of each first-stage bionic vein-shaped small channel. Under the condition of not additionally increasing the conveying power consumption of fluid in a flow channel, the high-temperature area of a heat source center can be rapidly cooled, the temperature field in the plate body can be highly homogenized, the temperature uniformity of the cooled power battery is improved, and compared with a conventional liquid cooling plate, the cooling plate has the advantages of being simple in structure and convenient to use. And the highest temperature of the power battery and the battery tabs can be reduced, and the temperature difference between the two tabs of the battery is reduced.

The invention belongs to the technical field of battery system fire protection, and particularly relates to a battery pack liquid cooling plate runner structure with fire protection and a method thereof, the structure comprises a liquid cooling plate, a fire protection structure is fixedly mounted at the top of the liquid cooling plate, and a heat exchange structure is arranged at the top of the liquid cooling plate and far away from the fire protection structure; the fire fighting structure comprises a fire fighting intervention flow channel, the fire fighting intervention flow channel is formed in an inner cavity of the liquid cooling plate, the top of the liquid cooling plate communicates with a fire fighting liquid inlet pipe, branch flow channels are formed in the inner surface of the fire fighting intervention flow channel, and fire fighting medium spraying holes are formed in the inner surfaces of the branch flow channels. According to the battery pack liquid cooling plate flow channel structure with the fire protection function and the method thereof, the fire protection pipe is inserted into the fire protection liquid inlet pipe, then the combined battery packs are stacked into a battery cabinet, and when the battery packs emit heat, heat is exchanged through flowing of cooling liquid, so that the temperature difference of the battery packs is smaller, the temperature rise is lower, and the service life of the whole battery pack is prolonged; and meanwhile, when the temperature of a single battery pack is abnormal, cooling can be performed immediately.

The invention provides a high-safety flame-retardant lithium ion battery electrolyte with a low-reactivity coordination structure, and relates to the technical field of energy storage batteries. High-stability bis (fluorosulfonyl) imide lithium salt is used as lithium salt, an ether solvent with weak solvation ability is used as an auxiliary solvent, and an additive is added. The low-reaction-activity solvent and the high-stability salt are adopted to replace high-reaction-activity components in a traditional electrolyte, the proportion of the lithium salt, the solvent and the additive is regulated and controlled to construct the high-safety flame-retardant lithium ion battery electrolyte with a low-reaction-activity coordination structure, and the thermal safety of the battery can be remarkably improved. According to the electrolyte, the self-heat-production reaction rate of an electrolyte-electrode interface and the generation of combustible gas are effectively inhibited, the thermal failure starting temperature and the triggering temperature of the battery are increased, the maximum temperature of thermal runaway is reduced, the intrinsic thermal safety of the high-energy-density lithium ion battery is greatly improved, and the electrolyte is suitable for the high-specific-energy lithium ion battery.

The invention discloses a preparation method of a wide-temperature-range multistage phase-change temperature-adjusting asphalt mixture. The preparation method comprises the following steps: respectively preparing a plurality of different composite organic eutectic phase-change materials; a plurality of different composite organic eutectic phase-change materials are compounded according to different proportions to obtain the wide-temperature-range multistage phase-change material. The wide-temperature-range multi-stage phase-change material is doped into an asphalt mixture according to the mass ratio of 3%-5%, and the wide-temperature-range multi-stage phase-change temperature-adjusting asphalt mixture is formed. The wide-temperature-range multi-stage phase-change temperature-adjusting asphalt mixture disclosed by the invention can continuously play a phase-change heat storage function in a high-temperature environment in summer, and achieves the effects of delaying the pavement temperature change rate, reducing the pavement maximum temperature, delaying the daily maximum appearance time, reducing the pavement surface temperature and improving the pavement temperature. Therefore, the urban heat island effect can be relieved, and the pavement durability is prolonged.

This utility model discloses a water-cooling system structure and a power battery system suitable for batteries, including a shunt pipe and a manifold pipe, with several water-cooling plates disposed between the shunt pipe and the manifold pipe; one end of each water-cooling plate is connected to the shunt pipe via an inlet pipe, and the other end is connected to the manifold pipe via an outlet pipe; the manifold pipe includes a return water pipe and a connecting pipe, with a first connection port and a second connection port on both ends of the connecting pipe, the first connection port communicating with one end of the return water pipe, and the second connection port communicating with the other end of the return water pipe; the connecting pipe is provided with a baffle structure for isolating the liquid flow in the connecting pipe, the baffle structure being located between the first connection port and the second connection port and adjacent to the second connection port; the bottom end of the shunt pipe is connected to an inlet pipe with a quick-connect water inlet connector, and the bottom end of the manifold pipe is connected to an outlet pipe with a quick-connect water outlet connector. This solves the problem of large temperature differences and high temperatures in existing locomotive battery water-cooling systems, which directly affect the battery system's lifespan.

The application discloses an embedded voltage-stabilized heat-dissipation PCB structure with a thermoelectricity synergic regulation layer and a preparation method thereof. The structure comprises at least one PCB inner layer and a chip power supply pad arranged on the inner layer, and a ring-shaped or C-shaped thermoelectric material pattern (ZT>0.5 at room temperature) is embedded in a region corresponding to the chip power supply pad directly below the inner layer. A first end of the thermoelectric material pattern is electrically connected to a power supply layer, and a second end is electrically connected to a grounding layer or a heat-dissipation through hole. The application utilizes the temperature difference during the operation of a chip to drive the thermoelectric material to generate a reverse electromotive force to inhibit power supply ripple, and simultaneously utilizes the Peltier effect to actively pump heat, so that the inner layer is integrated with voltage stabilization and heat dissipation. The power supply ripple can be reduced by 25% to 42% and the surface temperature of the chip can be reduced by 11 DEG C to 14 DEG C by using the PCB structure. The application directly integrates the thermoelectric function in the PCB inner layer, does not occupy the surface layer area, and is suitable for the packaging substrate of high-performance computing chips.

The engine waterway comprises a cylinder cover water jacket and is characterized in that a guide chain cavity and a cylinder cover are arranged at the front end of the cylinder cover water jacket, an exhaust port is formed in the exhaust side of the cylinder cover, and a water outlet is formed between the guide chain cavity and the exhaust side of the cylinder; a plurality of straight water channels are arranged inside the air cylinder water jacket, the straight water channels are communicated with the air cylinder body, and cooling liquid directly enters an engine water channel through the straight water channels to cool an exhaust port pipeline. And a larger space is reserved for other structures of the whole automobile.

The present invention relates to the field of nuclear power engineering, namely the placement of unsheathed fuel assemblies in a nuclear reactor core, aiming to improve the heat dissipation of fuel elements in a nuclear reactor. The nuclear reactor core comprises a hexagonal unsheathed fuel assembly having fuel elements located on a triangular grid with a spacing greater than the diameter of the fuel element cladding. The fuel elements comprise spiral spacer ribs on the cladding and are rigidly fixed in a given angular direction so that the fuel elements are in rib-to-rib contact at a height position at which the fuel elements reach the maximum fuel element cladding temperature during reactor operation. The fuel assembly is positioned in such a way that the fuel elements located on the surface of the fuel assembly form a single triangular grid with the remaining fuel elements in the core, and ensure that all the fuel elements are in rib-to-rib contact at a height position at which the highest fuel element cladding temperature is reached during reactor operation. At the same time, incorrect placement of the fuel assembly in the core is eliminated.

The invention provides a differential friction stir welding method for an aluminum-based material part, and relates to the technical field of friction stir welding of aluminum-based materials. According to the main technical scheme, a set differential friction stir welding tool is adopted, and differential friction stir welding is conducted on an aluminum-based material part to be welded; the differential friction stir welding tool comprises a stirring needle assembly and a shaft shoulder assembly. The stirring needle assembly comprises a stirring needle and a stirring needle connecting handle; the stirring needle is made of tungsten carbide-cobalt alloy; the shaft shoulder assembly comprises a shaft shoulder and a shaft shoulder connecting handle; the shaft shoulder is made of tungsten carbide-cobalt alloy; in the tungsten carbide-cobalt alloy, the content of cobalt is 12-25 wt%. According to the method, the set differential stirring welding tool is utilized, weld nugget reinforced phase particles can be broken, the higher strengthening effect is achieved, coarse grain weld nugget grains are refined, and therefore low-heat-input differential stirring friction welding of the aluminum-based material thick plate can be achieved, coarsening of a weld joint structure is restrained, and the welding quality of the aluminum-based material thick plate is improved. And the mechanical property of the large-thickness structural part joint is obviously improved.

The invention discloses a two-stage gas producer and a coal gasification method, the gas producer comprises: a gas producer provided with a feed inlet, an upper-stage gas outlet, a lower-stage gas outlet, a second gasifying agent inlet, and a first gasifying agent inlet; the fire grate is arranged in the gas producer and is positioned below the second gasifying agent inlet; and a phenol water vapor outlet of the phenol water vapor stripping tower, which is communicated with the first gasifying agent inlet and the second gasifying agent inlet, is formed in the phenol water vapor stripping tower. The heat of the lower section coal gas is respectively used for heating phenol water in the reboiler and superheated steam in the superheater, the sensible heat of the lower section coal gas is recovered, the temperature of the lower section coal gas is reduced, the heat efficiency is high, meanwhile, the phenol water obtained after purification treatment of the upper section coal gas is recycled, and the resource utilization rate is improved.

The invention relates to an air-cooled battery pack based on two-phase flow phase change temperature equalization, and belongs to the technical field of air-cooled energy storage. The air-cooled battery pack comprises a shell and a battery module, a fan is arranged at the front end of the shell, openings are formed in the rear end and the side face of the shell, a two-phase flow temperature equalizing plate is arranged at the bottom of the shell and comprises a temperature equalizing plate body and a cavity, and an evaporation area and condensation areas located on the two sides of an evaporator are arranged in the cavity. Through the holes in the rear end and the side face of the air-cooled battery pack, cold air flow provided by the energy storage system can be introduced into the battery pack from the rear end and the two sides of the battery pack, the air flow in the battery pack is pumped out through the fan, the situation that the temperature of the rear portion of the battery pack is too high is avoided, and circulating air cooling capable of restraining the front-back heat cascade phenomenon is achieved; excessive heat in the middle of the battery pack is dispersed to the front side and the rear side through the two-phase flow temperature equalizing plate, and the temperature equalizing performance of the battery pack can be effectively improved.

The application relates to a heating assembly and an aerosol generating device comprising the same, comprising: a tubular base body having a proximal end and a distal end arranged oppositely, the proximal end of the tubular base body providing an entrance for insertion of an aerosol generating article; the tubular base body comprising a first portion and a second portion distributed along a longitudinal direction, the first portion being closer to the proximal end of the tubular base body than the second portion, and the first portion having an annular first heating zone thereon, and the second portion having a second heating zone and a third heating zone distributed along a circumferential direction and spaced from each other thereon, the heating zones being configured to provide energy to heat the aerosol generating article.

The utility model relates to an oil cooling motor with a spraying oil pipe, which comprises a shell, a stator, a rotor and a spraying pipe assembly, a cover plate A and a cover plate B are respectively fixed at two ends of the shell, a gap is reserved between the stator and the shell, the spraying pipe assembly is fixed in the gap, the spraying pipe assembly comprises an axial spraying oil pipe and a circumferential spraying oil pipe which are connected with each other, oil holes are formed in the axial spraying oil pipe and the circumferential spraying oil pipe, an oil inlet pipe is further arranged on the shell, and the oil inlet pipe is communicated with the axial spraying oil pipe and / or the circumferential spraying oil pipe; the rotating shaft is provided with an axial oil duct, the axial oil duct is further provided with a side wall oil hole, the cover plate A or the cover plate B is provided with a radial oil inlet pipeline, one end of the radial oil inlet pipeline is communicated with the axial spraying oil pipe, the other end of the radial oil inlet pipeline extends outwards into the axial oil duct, the rotor core is provided with a radial oil throwing passage, and the side wall oil hole is communicated with the radial oil throwing passage. The stator of the motor is cooled more uniformly, and the overall heat dissipation efficiency is high.

The present invention relates to a wind cooling technology design for a power battery, and in particular to a wind cooling system for heat dissipation of a power battery pack. While optimizing the heat dissipation structure of the battery pack, the air temperature is reduced, and through an electronic control device, targeted high-efficiency cooling of a battery module is achieved, so as to improve the working efficiency, safety and temperature balance of the battery pack. The system comprises a battery module (2), wherein a battery pack shell (1) is provided outside the battery module (2), a battery pack air outlet (7) is provided on the upper part of the battery pack shell (1), and the battery pack air outlet (7) can be connected to the battery module (2) through the battery pack shell (1), a battery pack air inlet (6) is provided at the bottom of the battery pack shell (1), and the battery pack air inlet (6) is also connected to the battery pack shell (1), and semiconductor refrigeration devices (3) are provided on both sides of the battery pack shell (1).

The utility model discloses a gravity dam foundation constraint area concrete construction device which comprises a peripheral steel formwork used for limiting the boundary of the appearance of a gravity dam, anti-crack formworks longitudinally and transversely spliced in the peripheral steel formwork to form a grid shape, and cooling water pipes spirally arranged in the internal area of the grid. The anti-crack formwork is of a rectangular cylindrical structure prefabricated by concrete, a primary pouring area is formed in a grid inner area, the primary pouring area is filled with pre-poured concrete pouring blocks, a secondary pouring area is formed by a cavity of the anti-crack formwork, and the secondary pouring area is filled with post-poured concrete pouring blocks. The gravity dam is divided into the primary pouring area and the secondary pouring area, shrinkage stress generated when the concrete pouring blocks in the primary pouring area are cooled is released in a cracking mode of the anti-cracking formwork, and the risk that temperature cracks are generated in concrete in the foundation constraint area of the gravity dam is effectively reduced; meanwhile, the purposes of reducing the construction cost and shortening the construction period are achieved; and the anti-crack template is prefabricated by concrete and does not need to be dismounted.

The invention belongs to the technical field of phosgene preparation and isocyanate preparation, and particularly relates to a method for obtaining hydrogen chloride with low light component content in an isocyanate production process, which comprises the following steps: (1) synthesizing phosgene from chlorine gas flow and carbon monoxide flow under the catalysis of a catalyst; the inlet temperature of a catalyst bed layer of the phosgene synthesis reactor is controlled to be 110 DEG C or above, and the highest temperature is 450 DEG C or below; (2) condensing and separating the obtained gas-phase material flow I to obtain a liquid phosgene material flow with low content of a light component i; and (3) feeding the liquid phosgene material flow into an isocyanate synthesis process for reaction, and performing condensation and impurity removal on a generated gas phase material flow II to obtain a hydrogen chloride material flow with low content of a light component ii. According to the method, the content of light component impurities in the hydrogen chloride byproduct material can be controlled in a relatively low range, so that the temperature of a catalyst of a hydrogen chloride catalytic oxidation reactor taking hydrogen chloride as a raw material is kept stable, and the stability of an isocyanate production process is improved.

A burner (1) for a reforming reactor comprising an oxidant tube (4) coaxially arranged within an annular process gas channel (5) wherein a nozzle (10) has a trumpet-shaped shape and a lip (16) of the nozzle has a waveform or sinusoidal profile.

The present invention provides a hypersonic leading edge cooling design method based on a combined tributary pipe and wall depression enhanced heat transfer method, which is suitable for leading edge areas with severe aerodynamic thermal problems in hypersonic aircraft, and relates to a hypersonic leading edge cooling technology based on a combined tributary pipe and wall depression enhanced heat transfer method, which realizes coolant diversion and increases the roughness of the pipe wall surface through a combination of adding tributary pipes and adding arc-shaped depressions on the pipe wall surface, thereby enhancing heat transfer. The present invention uses a hypersonic leading edge cooling technology based on a combined tributary pipe and wall depression enhanced heat transfer method to improve the heat transfer capacity of the cooling medium of the active convection cooling technology under limited cold source conditions, and enhance the heat reduction effect of the active cooling technology.

This utility model relates to the field of automotive brake technology and discloses a composite heat dissipation brake assembly, including a brake disc with multiple heat dissipation holes on its surface and ventilation ribs inside. A bracket is located on one side of the brake disc, and a top cover is located at the upper end of the bracket. Friction pads are located on the lower side of the top cover and inside the bracket, and the friction pads are disposed on the upper and lower sides of the brake disc. A caliper body is located on the upper side of the top cover and is connected to the friction pads. A cooling mechanism is located inside the bracket and communicates with the interior of the friction pads. This design has the advantages of reducing the maximum temperature of the brake caliper during operation, increasing braking force during prolonged braking, and reducing braking distance. It solves the problem that if heat cannot be effectively dissipated, it will lead to a decrease in braking performance, thus affecting driving safety.

The present disclosure relates to the technical field of motors, and in particular, relates to a stator assembly and a motor. The stator assembly includes: a stator core and a winding; wherein a plurality of stator slots are arranged in the stator core, the stator slots being successively arranged in an annular array along a circumferential direction of the stator core; and the winding is wound on a rectangular conductor; wherein a plurality of layers of rectangular conductors are mounted in each of the stator slots, the layers of rectangular conductors being successively arranged along a radial direction of the stator core; wherein an average cross-sectional area of the rectangular conductors close to a center of the stator core is greater than an average cross-sectional area of all the rectangular conductors in the stator slot. This reduces loss density, balances heat generation and heat dissipation of different conductors in the stator slots, so as to improve heat dissipation performance of the motor by reducing a maximum temperature of the motor.

This invention discloses a power battery module based on a PCM heat absorber plate, comprising a battery pack consisting of several cylindrical batteries arranged in an array; a PCM heat absorber plate, the interior of which is filled with a thermally conductive porous structure and paraffin phase change material, which absorbs heat through melting of the phase change material to reduce battery temperature; the PCM heat absorber plate is provided with several sleeve structures, the sleeves being connected front and rear along the air-cooling flow direction via sleeve connecting plates, and the cylindrical batteries being mounted on the PCM heat absorber plate through the sleeve structures; heating strips, located at the bottom of the PCM heat absorber plate and perforated, fitting around the sleeves, used to heat the battery pack at low temperatures; and a cooling fan, located at the head or tail of the PCM heat absorber plate, used for air-cooling heat dissipation of the battery pack and the PCM heat absorber plate. This invention, using a PCM heat absorber plate, can enhance the thermal conductivity and heat absorption capacity between batteries, thereby reducing local hot spots and temperature differences between batteries, achieving efficient thermal management.

The application relates to the technical field of turbine blade trailing edge cooling, and relates to a wave-shaped flow guide structure applied to a turbine blade trailing edge and a turbine blade. The turbine blade trailing edge is provided with a cooling channel. The wave-shaped flow guide structure comprises a plurality of rows of spoiler columns and a plurality of flow guide plates. The spoiler columns are arranged in the cooling channel and arranged along the flow direction and the span direction, and the spoiler columns in the adjacent two rows are alternately arranged. The flow guide plates are arranged in the cooling channel and extend in a wave shape along the span direction. The wave-shaped extension path of the flow guide plates alternately passes through the regions between the adjacent rows of spoiler columns in sequence. The application can regulate and control the span-wise distribution of the flow in the wedge-shaped channel, on the one hand, strengthens the heat exchange effect in the wedge-shaped channel, and on the other hand, improves the uniformity of the span-wise distribution of the cooling air.

The present invention discloses a method for optimizing the power distribution of a modular prismatic high temperature gas-cooled reactor, including: determining the average enrichment, the ratio factor of the enrichment of fuel assemblies in radial zones, and the ratio factor of the enrichment of fuel assemblies in axial layers; determining the enrichment of each fuel assembly according to the average enrichment, the ratio factor of the enrichment of fuel assemblies in radial zones, and the ratio factor of the enrichment of fuel assemblies in axial layers; and outputting the optimization result according to the enrichment of each fuel assembly. The beneficial effect of the present invention is that the present invention optimizes the enrichment of fuel assemblies at different positions according to the partitioned and layered arrangement, can effectively optimize the core power distribution, make the maximum temperature of the core fuel as low as possible, improve the core temperature rise margin, and ensure the realization of the inherent safety of the core.

The present invention provides a radiator and water heater combination structure, including: a thermal superconducting plate, with interconnected sealed channels formed inside, and the sealed channels are filled with heat transfer medium; a liquid-cooled radiator, located on the surface of the thermal superconducting plate, with a liquid channel formed inside the liquid-cooled radiator, and a liquid inlet and a liquid outlet are provided on the liquid-cooled radiator; a water heater body, with water to be heated inside; a heat exchanger, located inside the water heater body; a first circulation pipe, one end of which is connected to the liquid inlet and the other end is connected to the heat exchanger; a second circulation pipe, one end of which is connected to the liquid outlet and the other end is connected to the heat exchanger; a circulation pump, which is located on the first circulation pipeline or the second circulation pipeline. In the present invention, when the power device is working normally, the thermal superconducting plate and the liquid-cooled radiator can reasonably utilize the heat generated by the power device, which can be used to heat the cold water in the water heater body to generate hot water for domestic use or heating, saving energy consumption and improving the quality of life.

The utility model relates to a battery module, energy storage equipment and a power utilization device, the battery module comprises a battery unit, the battery unit comprises a first battery monomer and a second battery monomer, the first battery monomer and the second battery monomer are arranged in sequence, the first battery monomer comprises a first pole, and the second battery monomer comprises a second pole. The second battery monomer comprises a second pole arranged adjacent to the first pole, and at least one of the first pole and the second pole is of an elliptical structure; the sheet is provided with a first welding part and a second welding part, the first welding part is welded with the first pole column, the second welding part is welded with the second pole column, and current is transmitted between the first pole column and the second pole column through the sheet. And the elliptical long axis of the first pole and / or the second pole is perpendicular to the direction from the first welding part to the second welding part of the bar or is arranged at a preset included angle with the direction from the first welding part to the second welding part of the bar.

The present invention provides a cooling control method, device and equipment for an EGR system, the method comprising: when the EGR system of a vehicle is in operation, obtaining the operating parameters of the EGR system; wherein the operating parameters include the current intake air temperature, the current intake air flow rate and the current inlet water temperature of the EGR cooler; obtaining the current cooling water specific heat capacity and the current cooling water density corresponding to the current inlet water temperature; determining the current EGR gas heat exchange capacity according to the current intake air flow rate; determining the current inlet and outlet water temperature difference according to the current intake air temperature; determining the target inlet water flow rate according to the current EGR gas heat exchange capacity, the current inlet and outlet water temperature difference, the current cooling water specific heat capacity and the current cooling water density; and controlling the cooling water flow control element according to the target inlet water flow rate to adjust the cooling water flow rate entering the EGR cooler. The present invention can adjust the cooling water flow rate flowing into the EGR cooler according to the cooling demand of the EGR gas.

This disclosure provides an electrode, a cell assembly including the electrode, a single cell including the cell assembly, a battery device including the single cell, and an electrical device including the battery device or the single cell. The electrode includes a current collector and a material layer disposed on at least one side surface of the current collector along a first direction. The material layer includes a first material layer and a second material layer. The first material layer includes a first material, and the second material layer includes a second material. The thermal conductivity of the first material is greater than that of the second material. Along a second direction, at least one end of the electrode has a tab. The first material layer is located in the end region of the current collector near the tab. Along the second direction, the second material layer is located on the side of the first material layer away from the tab. The first and second directions intersect, enabling rapid heat transfer from the end of the cell near the tab to the end away from the tab. This reduces the temperature difference and the maximum temperature while increasing the minimum temperature of the cell, thereby improving the fast-charging performance and lifespan of the cell.

The present application relates to a flame tube, an engine and a helicopter, wherein the flame tube comprises an inner flame ring and an outer flame ring, one end of the inner flame ring and the outer flame ring are provided with an opening, the other end of the inner flame ring and the outer flame ring are connected by a mounting plate, a plurality of evaporation tubes are mounted on the mounting plate, an annular cavity is formed between the inner flame ring, the outer flame ring and the mounting plate, the evaporation tube comprises a confluence pipe and an evaporation nozzle, the evaporation nozzle is located in the annular cavity and a plurality of the evaporation nozzles are arranged in an annular shape around the axis of the annular cavity in a preset order, a plurality of jet tubes are arranged on the mounting plate, a plurality of the jet tubes are connected with the annular cavity, and a plurality of the jet tubes are arranged in a spiral shape around the axis of the annular cavity. The flame tube of the present application effectively improves the uniform distribution capability of the oil-gas mixed fluid, improves the outlet temperature field of the combustion chamber, and improves the combustion efficiency.

The invention belongs to the field of analytical chemistry instruments, and particularly relates to an analog simulation method for the temperature change of an electrospray needle along with sheath flow gas in an ion mobility spectrometry ionization region based on COMSOL Multiphysics, and the method comprises the following steps: constructing a simplified electrospray needle model; according to the obtained electrospray needle model, simulating a laminar flow field and a temperature field of sheath flow gas to simulate a heat dissipation process of the sheath flow gas; and evaluating the influence of the external temperature of the sleeve on the internal sleeve of the electrospray needle model through fluid-solid coupling heat transfer, and performing simulation operation to obtain a simulation result. According to the method, two-dimensional modeling is carried out through software, an actual three-dimensional calculation model of the electrospray needle is highly simplified in an axial symmetry mode, the time cost needed by calculation is saved, and meanwhile the accuracy of the model can be guaranteed. And carrying out compressible flow treatment on sheath flow gas in the spray needle, and carrying out finite element analog simulation of non-isothermal flow through fluid-solid coupling.

This invention relates to a lithium-ion battery thermal management system and simulation optimization method based on PCM and liquid cooling coupling, belonging to the field of lithium battery thermal management technology. It includes a lithium battery, a battery housing, spacers, a metal casing, a phase change material (PCM), and a temperature control subsystem. Each metal casing houses one lithium battery, and multiple metal casings form a metal casing array to house multiple lithium batteries. A PCM is filled between each lithium battery and the metal casing wall. Spacers are placed between adjacent metal casings to reserve coolant flow channels. The battery housing seals the metal casing array. The temperature control subsystem monitors the temperature of the lithium-ion batteries and the outflowing coolant, and adjusts the coolant flow rate based on the temperature monitoring data. It also includes umbrella-shaped metal fins embedded in the PCM, with the roots of the metal fins contacting the surface of the lithium-ion battery or the wall of the cooling plate, and the umbrella-shaped openings facing the interior of the PCM. This invention can expand the heat dissipation coverage and significantly improve temperature uniformity.