54results about How to "Improve temperature consistency" patented technology

The utility model provides a heat dissipation structure and a battery module, the heat dissipation structure comprises a plurality of cooling plates which are sequentially distributed at intervals along a first direction, a mounting space for mounting a battery cell is formed between every two adjacent cooling plates, and a cooling channel is formed in each cooling plate; a flow adjusting valve is arranged at an inlet or an outlet of the cooling channel of at least one cooling plate, and the flow adjusting valve is used for adjusting the flow of the cooling medium in the corresponding cooling channel. The flow regulating valve for regulating the flow of the cooling medium is arranged at the inlet or the outlet of the cooling channel of at least one cooling plate, and the flow of the cooling medium in the cooling channel of the cooling plate can be regulated through the flow regulating valve, so that the cooling efficiency of the cooling medium on the cooling plate is regulated; and the cooling speed of the cooling plate on the battery cells on one side or two sides of the cooling plate is adjusted, so that one or more battery cells with higher temperature in the plurality of battery cells can be quickly cooled, and the temperature difference of the plurality of battery cells is smaller.

The invention relates to the technical field of phase change materials, in particular to an intrinsic flame-retardant solid-solid phase change material and a preparation method and application thereof. The invention provides an intrinsic flame-retardant solid-solid phase change material which is prepared from the following raw materials in parts by mass: 65-75 parts of polyethylene glycol, 7-17 parts of epoxy resin and 18-33 parts of a flame retardant, the flame retardant is prepared from phosphorus pentoxide, expanded graphite and melamine; the epoxy resin comprises epoxy resin glue and an epoxy curing agent. The intrinsic flame-retardant solid-solid phase change material can solve the technical problems that a phase change material is easy to leak and easy to burn.

The invention belongs to the technical field of heating furnaces, and particularly relates to an oxygen-enriched combustion system and method for a coal gas single heat storage type heating furnace. Comprising an oxygen pressure regulating branch, a first heating section oxygen lance oxygen injection branch and a main pipe oxygen enrichment branch, the oxygen pressure regulating branch is provided with a pressure transmitter and a temperature transmitter, an oxygen source is communicated with the pressure transmitter and the temperature transmitter through a pipeline, and oxygen flows into the first heating section oxygen lance oxygen injection branch and the main pipe oxygen enrichment branch after being subjected to pressure regulation through a pressure valve. A flow control valve is arranged on the first heating section oxygen lance oxygen injection branch, oxygen is fed into the heating furnace, and the main pipe oxygen enrichment branch feeds enriched oxygen into the main pipe through an enriched oxygen distributor. Flexible switching of different oxygen enrichment modes of the heating furnace is achieved, the burner in the oxygen lance oxygen injection branch of the first heating section is not reversed, total-oxygen combustion of the burner is achieved, under the oxygen enrichment branch of the main pipe, oxygen is conveyed to the main pipe through the oxygen enrichment distributor through the other branch to be mixed with combustion air, and total-furnace oxygen enrichment combustion is achieved.

The utility model discloses a high heat conduction type tire curing bladder forming mould, which comprises an upper mould and a lower mould, a heat conduction mould box is arranged in the lower mould, a heat conduction base is arranged at the bottom of the lower mould, an electric heating pipeline is arranged in the heat conduction base, and a heat conduction pipe is arranged in the electric heating pipeline. A heat conduction metal cushion block is installed on the surface of the upper end of the heat conduction base, the heat conduction metal cushion block is tightly attached and fixed to the surface of the bottom end of the heat conduction mold box, a mold box sealing cover is installed in the upper mold, and the mold box sealing cover comprises a sealing rubber ring, an upper cover plate, a mold box sealing ring and a limiting clamping frame. The mold for producing the tire curing bladder is conveniently mounted and designed, the heat conduction metal cushion block is embedded in the mold to be matched with the heat conduction mold box, and meanwhile, the upper end of the heat conduction mold box is designed in a sealed protection manner, so that heat in the mold box can be stored and conducted to the maximum extent; therefore, when the high-heat-conductivity tire curing bladder is prepared, the temperature consistency of the bladder can be good.

The utility model relates to the technical field of battery packs, and provides a complementary cooling device, a liquid cooling system, a battery pack and electric equipment.The complementary cooling device comprises a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate and the second liquid cooling plate are arranged in parallel and form a containing space, and the containing space is used for containing a to-be-cooled object; the circulation direction of a cooling medium in the first liquid cooling plate is opposite to the circulation direction of a cooling medium in the second liquid cooling plate; in the flowing direction of the cooling medium, the flow speed of the cooling medium in the first liquid cooling plate and the second liquid cooling plate is gradually increased. According to the scheme, the staggered liquid inlet temperature and liquid outlet temperature can be formed at the two ends of the two side faces of the to-be-cooled object, the heat interaction capacity of the liquid outlet area can be improved, the cooling heat exchange capacity of the to-be-cooled object is improved, and the regional temperature difference is reduced.

The invention discloses a water immersion type energy storage battery box integrated system which comprises an immersion type energy storage battery box, a heat exchanger, an ultrapure water preparation machine and a liquid storage tank, a cooling liquid outlet of the water immersion type energy storage battery box is connected with an inlet of the liquid storage tank, an outlet of the liquid storage tank is connected with an inlet of the ultrapure water preparation machine, an outlet of the ultrapure water preparation machine is connected with an inlet of the heat exchanger, and an outlet of the heat exchanger is connected with a cooling liquid inlet of the water immersion type energy storage battery box; the cooling liquid inlet and the cooling liquid outlet are correspondingly formed in the two opposite sides of the water-immersed energy storage battery box, and the cooling liquid inlet is higher than the cooling liquid outlet so that local immersion can be achieved. Through a local immersion mode, the heat dissipation (heating) capability of the battery can be enhanced, the effective utilization efficiency of the battery is improved, the temperature difference between the battery monomers is balanced, the fire-fighting property of the energy storage battery is enhanced, and meanwhile, the ultrapure water preparation machine is used for preparing ultrapure water as cooling liquid, so that the cost of the immersed energy storage system is greatly reduced.

The invention provides a battery and a vehicle, the battery comprises a plurality of battery monomers and a phase change part, the phase change part is arranged on at least one side of at least one battery monomer, and the phase change part is configured to release heat when the temperature is reduced to a phase change temperature so as to heat the battery monomers. According to the battery provided by the invention, the temperature consistency of the battery monomers in the battery is improved, the risk of lithium precipitation of the battery monomers is reduced, and the service life of the battery is prolonged.

The application discloses a kind of installation methods of assembled power component radiator, belong to the technical field of power component, comprising: copper layer is sprayed on the inside welding surface of each sub-radiator;Composite solder preform is prepared by solder alloy powder and pore-forming agent particles;After the superposition of radiator, composite solder preform and power module are sent into vacuum soldering furnace and are vacuum soldered;After vacuum soldering is completed, multiple independent power component radiator assemblies are obtained;Multiple independent power component radiator assemblies are spliced to obtain assembled power component radiator.The application forms exhaust passage by pore-forming agent before solder melting, and removes welding interface gas;Directional flow of molten solder is driven by electromigration effect, and bubbles are pushed to interface edge and discharged;Densification is realized by static pressure, and three-level strategy synergies, reduces the porosity, and improves heat dissipation performance and connection reliability.

The invention provides pulping equipment. The pulping equipment comprises a circulating tank, a top cover, a dispersing structure and a heat dissipation structure. An accommodating cavity for accommodating slurry is formed in the circulating tank. The top cover is arranged at the top of the circulating tank. The dispersing structure is located in the containing cavity and arranged at the bottom of the circulating tank, and the dispersing structure is used for dispersing the slurry and enabling the slurry to circularly flow in the circulating tank. The heat dissipation structure is connected to the top cover, at least part of the heat dissipation structure is located in the containing cavity, and the heat dissipation structure is used for conducting heat dissipation on the slurry. Thus, the pulping equipment dissipates heat of the slurry close to the center of the circulation tank through the heat dissipation structure and dissipates heat of the slurry close to the inner wall of the circulation tank through the tank body of the circulation tank, so that the heat dissipation efficiency of the slurry is greatly improved, the slurry is jointly dissipated through the heat dissipation structure and the circulation tank, and the heat dissipation efficiency is improved. And the temperature consistency of the slurry is effectively improved, so that the quality of the slurry is improved.

This utility model discloses an electric heating forced-air drying oven, relating to the technical field of drying ovens. The electric heating forced-air drying oven includes an outer shell and a controller on one side. An exhaust port is provided at the upper end of the outer shell, and cavities are provided on both sides of the outer shell. Mounting holes are provided on the side walls of the cavities, and an air outlet plate (first and second) is rotatably mounted in each of the two mounting holes. The first and second air outlet plates are connected by an air duct, and the air inlet of the air duct is connected to the air outlet of a heating pipe. The air inlet of the heating pipe is connected to the air outlet of a blower. This utility model, through the rotating air outlet plates and the staggered air outlet design, achieves uniform airflow distribution inside the drying oven, effectively improving temperature consistency and drying efficiency.

This utility model discloses a cooling device for an electrically heated lithium battery material tunnel kiln, belonging to the field of tunnel kiln cooling technology. It includes a frame, an insulation layer, a track, multiple saggers, and a kiln car. The insulation layer is disposed on the inner wall of the frame. The track is disposed at the bottom of the frame along the length of the tunnel kiln. The kiln car is rotatably connected to the track. The multiple saggers are spaced apart on the kiln car. It also includes cooling pipes, a liquid supply pipe, a liquid discharge pipe, a liquid cooling station, and a circulation tower. The end of the cooling pipe is connected to the top of the frame and extends into the gap between the multiple saggers. Both ends of the liquid supply pipe are connected to one end of the cooling pipe and the liquid cooling station, respectively. Both ends of the liquid discharge pipe are connected to the other end of the cooling pipe and the circulation tower, respectively. The cooling pipes can be evenly distributed on both sides of the saggers, ensuring uniform material cooling and high consistency in material forming.

A multi-stage cooling tower used on a powder production line comprises a first-stage cooling tower and a second-stage cooling tower, the top of the first-stage cooling tower and the top of the second-stage cooling tower are each provided with a fan and a water retaining device located below the fan, and the upper portion of the first-stage cooling tower and the upper portion of the second-stage cooling tower are further provided with a cooling water inlet pipe and a spraying water pipe connected with the cooling water inlet pipe. A heat exchange coil pipe is arranged below the spraying water pipe; the heat exchange coil pipe set comprises a plurality of heat exchange pipe sets arranged from top to bottom, and each heat exchange pipe set is composed of an upper heat exchange coil pipe and a lower heat exchange coil pipe which are arranged in a staggered mode. The multi-stage cooling device has the advantages that multi-stage cooling is achieved, high-temperature cooling return water is gradually cooled, and the high-temperature return water is rapidly cooled. The cooling efficiency is high, the cooling water temperature consistency is good, and the accuracy of the reaction temperature can be guaranteed in powder production.

The invention provides an SAR satellite structure suitable for multi-satellite launching and a design method, and relates to the technical field of spacecraft design, the SAR satellite structure comprises a satellite main body, a solar wing, a radiation unit, an antenna substrate, a plate penetrating connector, a TR assembly and a semi-rigid connection assembly, the SAR satellite structure adopts a trapezoidal cross section configuration, the internal space of a rocket fairing is fully utilized, and the space of the rocket fairing is fully utilized; a heat conduction unit and a heating unit are arranged between the radiation unit and the antenna substrate and between the antenna substrate and the TR assembly, so that the radiation array plane flatness of the radiation unit and the installation flatness of the TR assembly are ensured, heat conduction between single machines is increased, and the temperature consistency of the antenna is improved; the semi-rigid connection assembly can reduce the response of the active section antenna, release the thermal deformation of the antenna, reduce the flatness change, improve the precision of a radiation array plane, and solve the problems that the space utilization rate of an existing SAR satellite is low, the flatness of the antenna is easily affected by thermal deformation, and the temperature of the antenna is difficult to control.

The invention relates to the technical field of heat exchange equipment, and provides a tube bundle type heat exchanger, a heat exchange performance calibration method thereof and a thermo-acoustic engine. The tube bundle type heat exchanger comprises a shell, a heating piece and a tube bundle, the shell comprises a heat exchange cavity and a working cavity, the heat exchange cavity and the working cavity are arranged at an interval, and liquid metal is arranged in the heat exchange cavity; the heating piece penetrates through the heat exchange cavity and is used for heating the liquid metal; the tube bundle penetrates through the heat exchange cavity and is spaced from the heating piece, openings in the two ends of the tube bundle communicate with the working cavity, and the tube bundle is used for conveying working gas. According to the tube bundle type heat exchanger, a uniform temperature field is formed through the combination of the heating piece and the liquid metal, the power of the heating piece can be directly used as reference data for measuring the heat exchange performance of the tube bundle type heat exchanger, and heat sources such as high-temperature flames and high-temperature flue gas do not participate in the heat exchange process of the tube bundle type heat exchanger; in other words, complex radiation and convective heat exchange modes do not exist, and the difficulty of accurate evaluation of the performance of the heat exchanger is effectively reduced.

The application discloses a thermal control structure, which comprises a low-precision heater in direct contact with a heating object, a heater substrate fixed to the other side of the low-precision heater, a high-precision heater fixed to the other side of the heater substrate, a temperature control boundary body fixed to the other side of the high-precision heater, and a plurality of temperature testing components fixed to the other side of the temperature control boundary body. The thermal control structure can make the temperature measuring boundary have higher temperature consistency, reduce the requirement for a temperature control algorithm, reduce the difficulty in realizing the constant-temperature boundary, and reduce the number of temperature sensors and the manufacturing cost. The application also discloses a thermal control method, which has the same advantages.

The invention relates to a front-end conditioning circuit integrated packaging module for gravitational waves and a packaging method, belongs to the technical field of semiconductor packaging, integrates a front-end circuit, greatly reduces the circuit area, facilitates temperature control, and is beneficial to improving the temperature consistency of the front-end conditioning circuit. The front-end conditioning circuit is integrally packaged, so that electromagnetic interference protection of the circuit can be realized, the influence of cosmic radiation on the front-end analog circuit of the measurement system can be avoided when the space environment is used for measurement, and the anti-interference capability of the measurement system is greatly enhanced; the method is suitable for precise measurement of gravitational wave signals in satellite-borne and intense radiation application scenes.

The application provides an oil cooling flat wire motor heat dissipation structure and motor. The heat dissipation structure is provided with oil injection ports on the side close to the stator winding. There are at least two groups of oil injection ports, and the multiple groups of oil injection ports are arranged along the axial direction of the stator winding. In the multiple groups of oil injection ports, at least one group of oil injection ports corresponds to the position of the end part of the stator winding, and at least one group of oil injection ports corresponds to the position of the end part of the stator winding close to the stator core. The cooling medium is sprayed to the position of the end part of the stator winding and the end part of the stator winding close to the stator core, so that the cooling medium flows along the direction from the end part of the stator winding to the stator core and the direction from the position of the end part of the stator winding close to the stator core to the end part of the stator winding, and flows through the inner layer of the stator winding. The beneficial effect of the application is that, under the influence of the shape of the stator winding and the gravity of the cooling medium, the cooling medium changes from random flow to directional flow, the contact area of the cooling medium and the stator winding is increased, and the heat dissipation performance of the motor is improved.

The utility model discloses an anti-thermal-diffusion air-cooled battery module structure which is characterized in that a mica plate is adhered among a plurality of square battery cells, a plurality of foams are adhered on two side surfaces of the mica plate, the mica plate and the square battery cells are separated by the foams, insulating sheets are adhered on the outer side surfaces of the head and tail square battery cells, and a plurality of foams are adhered on one side surface of each insulating sheet close to an end plate. The end plates are placed at the head and the tail of the battery module, and the steel belt is sleeved in the clamping grooves of the end plates to fix the battery module. The battery module disclosed by the utility model not only can prevent electric core level heat diffusion and greatly improve the safety performance of a product, but also can perform air-cooling large-area heat dissipation, is high in heat dissipation efficiency, uniform in electric core heat dissipation effect and high in electric core temperature consistency, improves the performance of the electric core and prolongs the service life of the electric core. The battery module is simple in structure, low in material cost, simple in grouping process, low in grouping difficulty, high in production efficiency, low in production cost, easy to realize mass production and high in market competitiveness.

The present invention is applicable to the field of battery cooling technology, and discloses a battery liquid cooling system and a vehicle having the battery liquid cooling system. The battery liquid cooling system includes a first liquid cooling plate connected to a battery module and a second liquid cooling plate sandwiched between two battery modules, the first liquid cooling plate and the second liquid cooling plate are both provided with a liquid inlet and a liquid outlet, the first liquid cooling plate and the second liquid cooling plate are internally provided with independent circulation channels whose two ends are respectively connected to the liquid inlet and the liquid outlet, and the liquid inlet and the liquid outlet of the first liquid cooling plate and the liquid inlet and the liquid outlet of the second liquid cooling plate are connected in parallel. The vehicle has the above-mentioned battery liquid cooling system. The battery liquid cooling system and the vehicle having the battery liquid cooling system provided by the present invention have good temperature consistency of the battery module, which is conducive to ensuring the normal use of the battery module.

The application discloses a kind of top box cover bottom double-channel liquid cooling immersion battery box, including the battery box and box cover plate;Battery module is installed in the battery box, and there is interval between adjacent battery module, battery box is filled with insulating immersion liquid, battery module is immersed in insulating immersion liquid, the bottom of the box cover plate is provided with the top liquid cooling channel of curved setting;The top and bottom independent liquid cooling channel of the application simultaneously cool insulating immersion liquid, form from top to bottom and from bottom to top double heat exchange path, effectively eliminate the temperature difference between module, avoid local overheating, improve the temperature consistency of whole package;Efficient balanced heat management makes battery always work in suitable temperature range, delays aging, reduces the risk of thermal runaway, guarantees long-term stable operation of energy storage system.

The present application provides a battery pack, comprising: a housing having a sealed housing inner cavity, the housing inner cavity having a cavity top and a cavity bottom; the battery cell group module is arranged in the inner cavity of the shell, and the battery cell group module comprises a connecting beam, two side plates and a plurality of battery cell stacking bodies; the plurality of battery cell stacking bodies are arranged along a first direction, and each battery cell stacking body comprises a plurality of battery cells stacked along a second direction; the connecting beams are at least arranged between two adjacent battery cell stacking bodies; the two side plates are located on the two sides, distributed in the second direction, of the battery cell stacking body, and the two side plates are connected through the connecting beam and clamp and fix the battery cell stacking body; a first flow gap is formed between the cell stack and the cavity top, a second flow gap is formed between the connecting beam and the cavity bottom, and the first flow gap and the second flow gap form a continuous snake-shaped flow channel for a heat exchange medium to flow along a first direction. According to the battery pack provided by the invention, the connecting beam can play a role in guiding the heat exchange medium flowing in the inner cavity of the shell, so that the heat exchange efficiency of the battery pack can be improved.

The invention discloses an open type immersion overflow battery pack which comprises a pack shell and a battery assembly installed in the pack shell, and the battery assembly comprises a plurality of battery monomers arranged at intervals; the wrapping shell is of an open structure with an opening in the top surface, a lower gap is formed between the battery assembly and the bottom surface of the wrapping shell and forms a lower liquid inlet area, and an upper overflow area is formed between the opening in the top surface of the wrapping shell and the top surface of the battery assembly; a middle channel for communicating the lower liquid inlet area with the upper overflow area is arranged between the battery monomers, and a side channel for communicating the lower liquid inlet area with the upper overflow area is arranged between the periphery of the battery assembly and the package shell; the lower liquid inlet area is provided with a flow distribution flow direction control assembly used for conducting liquid inlet flow distribution on the middle channel and the side channels. And a liquid inlet corresponding to the lower liquid inlet area is formed in the ladle shell. According to the open type immersion overflow battery pack, temperature control is achieved in an immersion mode, and the open type immersion overflow battery pack has the advantages of being high in heat exchange efficiency and good in temperature consistency.

The utility model relates to the technical field of batteries, in particular to a battery module with high temperature consistency, a battery and equipment, which comprise a battery cell group and a liquid cooling bottom plate, the liquid cooling bottom plate is arranged below the battery cell group and is connected to the battery cell group, a cooling channel for a cooling medium to flow is arranged in the liquid cooling bottom plate, discontinuous fins which are arranged at intervals are arranged in the cooling channel, the liquid cooling bottom plate is provided with a first end and a second end which are opposite to each other, and a liquid injection port of the cooling channel is positioned in the middle of the first end; therefore, the liquid injection port is formed in the middle of the first end of the liquid cooling bottom plate, so that a cooling medium flows in from the middle, with large heat accumulation, of the battery cell group, the middle of the battery cell group is subjected to optimal heat dissipation, the temperature difference between the middle and the periphery of the battery cell group is reduced, and the effects of improving the temperature consistency of the battery cell group and preventing the temperature difference from influencing the battery performance are achieved.

This invention discloses a multi-temperature linkage temperature-controlled aluminum nitride heater and its preparation method, belonging to the field of semiconductor ceramic technology. The heater includes an aluminum nitride ceramic substrate and a supporting base. A double-layer heating electrode is stacked on the ceramic substrate, wherein the second heating electrode layer adopts a zoned conductive circuit, dividing the temperature zones from the inside out into a center, inner ring, and outer ring. The inner and outer rings can be further subdivided into multiple independent sector-shaped zones and powered independently. A ceramic thermal resistor is built into the bottom of each temperature zone, insulated from the circuit, and works in conjunction with a PID controller to achieve zoned closed-loop temperature control. This invention solves the problems of poor temperature uniformity, localized overheating, and external temperature measurement lag in single-layer heating by using a double-layer heating synergy and a built-in temperature measurement structure, significantly improving temperature control accuracy and temperature uniformity. Simultaneously, a special aluminum nitride-based solder is used to connect the substrate and the base, resulting in good thermal expansion matching, high interface strength, excellent airtightness, and the ability to withstand high temperatures and thermal cycling shocks, adapting to the requirements of high-end semiconductor processes.

The application discloses a kind of rail vehicle power battery thermal management system and its control method, including first loop, second loop, heat exchanger and thermal management device;Thermal management device includes main controller, sub-controller and multiple water-cooling plates, each water-cooling plate is arranged one-to-one with each sub-battery pack;All water-cooling plates in each battery cluster are connected in parallel to form water-cooling plate branch, and the water inlet end or water outlet end of each water-cooling plate is provided with a first electric control valve;Each water-cooling plate branch is connected in parallel and then connected in series on the second loop, and the water inlet end or water outlet end of each water-cooling plate branch is provided with a second electric control valve;Sub-controller is used to obtain the temperature of corresponding sub-battery pack;The main controller is used to control the opening of each first electric control valve and / or second electric control valve according to the temperature of each battery pack.Compared with the prior art, the application achieves local precise temperature control of the battery system by dynamic distribution of the cooling liquid and the application of thermoelectric refrigeration heat exchange technology in the thermal management system, and improves the temperature consistency between sub-battery packs.

The present invention discloses a phase change liquid cooling device for improving the consistency of battery modules, including a porous battery rack, a temperature sensor, a flow guide assembly, an electromagnetic one-way valve, an immersion liquid cooling battery compartment and a pressure sensor. The present invention uses flow boiling technology to greatly improve the heat transfer performance of phase change liquid cooling, achieving a grouping efficiency of more than 90%. The present invention adopts gradient spacing to improve the temperature difference between groups caused by natural convection and heat accumulation effects in the design process of traditional battery modules, and reduces the maximum temperature difference of the battery module to below 2°C, with extremely high temperature consistency. The present invention can overcome the temperature difference of battery cells caused by the boundary layer effect and flow field structure of the working fluid during the immersion cooling design process through the introduction of porous battery racks and flow guide assemblies, thereby further improving temperature consistency.

The utility model provides a double-layer runner integrated liquid cooling device and a lithium ion battery cooling device, which comprise at least one group of double-layer runners which are arranged into a whole, one layer of the double-layer runners is provided with runners with the flowing direction from two sides to the middle, and the other layer of the double-layer runners is provided with runners with the flowing direction from the middle to the two sides. According to the liquid cooling device, double-circulation cooling or heating is conducted on the battery by arranging the double-layer flow channels with the opposite flow directions, the two layers of flow channels complement each other, one flow channel is from inside to outside, and the other flow channel is from outside to inside, compared with a single flow channel, the liquid cooling device can effectively improve the situation that the temperature difference of the battery is too large, the working temperature consistency of the battery is improved, and the service life of the battery is prolonged. The service life of the battery is further prolonged; the endurance mileage is improved.

The application discloses a fuel cell polar plate and a fuel cell, and relates to the technical field of batteries. The fuel cell polar plate comprises a polar plate body, a cooling medium inlet and a cooling medium outlet arranged along the length direction of the polar plate body, a distribution flow channel located between the cooling medium inlet and a main heat exchange flow channel, and the main heat exchange flow channel located between the cooling medium outlet and the distribution flow channel. A turbulence part is arranged in the distribution flow channel, and the turbulence part comprises a plurality of first turbulence structures. Two adjacent first turbulence structures are spaced apart. The distribution flow channel and the main heat exchange flow channel are formed in the polar plate body, and the turbulence part is arranged in the distribution flow channel, so that the turbulence part can guide and disturb the cooling medium, which is beneficial to improving the uniformity of the distribution of the cooling medium in the polar plate body, thereby improving the temperature consistency of different positions of the fuel cell. Moreover, the disturbed cooling medium can fully flow in the polar plate body, which is beneficial to the sufficient heat exchange of the cooling medium, and further improves the cooling effect of the fuel cell.

This invention belongs to the field of thermal management technology for power batteries in new energy vehicles, and relates to a single-motor linked active phase change lithium battery full-temperature-range thermal management system, comprising: a composite phase change material, a thermally conductive aluminum rod, a cooling fan, and a bidirectional drive motor; the composite phase change material is attached to the surface of the lithium-ion battery, and the cooling fan's heat dissipation direction is towards the lithium-ion battery; the thermally conductive aluminum rod is inserted into the composite phase change material, and the bidirectional drive motor is poweredly connected to the cooling fan and the thermally conductive aluminum rod respectively; the composite phase change material is composed of the following components in parts by weight, which are then impregnated in foamed graphite with a porosity of 78% to 82%: polyethylene glycol 1.6 to 2.0 parts, calcium chloride 8.7 to 9.1 parts, and calcium chloride hexahydrate 88 to 9 parts; this invention integrates high-temperature heat dissipation and low-temperature active heating modules using a unidirectional clutch structure, transforming passive heat storage into active intelligent thermal management, effectively reducing the system volume, and achieving efficient and safe thermal management of the battery across the entire temperature range.