30results about How to "Requires minimization" patented technology

The invention discloses a preparation method and application of an MXene / aramid nanofiber electromagnetic shielding hydrogel. The preparation method comprises the following steps: preparing an MXene / aramid nanofiber electromagnetic shielding hydrogel; the preparation method comprises the following steps: step 1, ultrasonically mixing a Ti < 3 > C < 2 > T < x > MXene dispersion liquid with liquid metal to obtain an MXene-coated LM mixed solution; step 2, adding an aramid nanofiber dispersion liquid prepared by deprotonation and a PVA (Polyvinyl Alcohol) solution into the MXene-coated LM mixed solution, and stirring to obtain a uniform solution; and 3, pouring the uniform solution into a mold, freezing, unfreezing, and demolding to obtain PVA-ANF / MXene-coated LM hydrogel, namely the MXene / aramid nanofiber electromagnetic shielding hydrogel. After the base material is prepared into the hydrogel, internal multiple reflection is structurally enhanced, and secondary pollution caused by reflection of electromagnetic waves is reduced.

The invention provides an optical lens. The optical lens comprises a lens barrel, three lenses and at least one spacing element, the three lenses and the at least one spacing element are arranged in the lens barrel, and the three lenses comprise a first lens, a second lens and a third lens which are sequentially arranged from the object side to the image side; the at least one spacing element comprises a first spacing element, and the first spacing element is located between the first lens and the second lens and is in contact with the image side surface part of the first lens; the effective focal length f1 of the first lens and the distance EP01 between the end face, closest to the object side, of the lens barrel and the object side face of the first spacing element meet the condition that f1 / EP01 is larger than or equal to-3.27 and smaller than or equal to-1.93; the inner diameter d1s of the object side surface of the first spacing element and the curvature radius R2 of the image side surface of the first lens meet the condition that d1s / R2 is greater than or equal to 0.63 and less than or equal to 1.59. According to the invention, the problem of poor reliability caused by the fact that an optical lens in the prior art meets the miniaturization requirement is solved.

The invention discloses a disc type rotating device of an automobile seat, and belongs to the technical field of automobile seats. Comprising a lower chassis; the group of lower gaskets are arranged on the upward side of the lower chassis; the rotating disc is supported on the group of lower gaskets and is provided with a rotating disc centering mechanism abdicating hole; the rotating disc centering mechanism is fixed with the lower chassis; the rotating disc driving mechanism is used for driving the rotating disc to rotate; the structure is characterized in that a gear ring plate is directly formed in the middle area of the lower chassis, a lower chassis center hole is formed in the center area of the gear ring plate, and a gear ring is formed on the wall body of the side, facing the lower chassis center hole, of the gear ring plate; the rotating disc centering mechanism is fixed to the lower chassis, a rotating disc locking and unlocking executing mechanism is arranged on the rotating disc, and a lock shaft traction connecting mechanism is arranged on the rotating disc driving mechanism. The device has the advantages of compact structure and convenience in manufacturing and assembling; the stable effect tending to be gapless when the rotating disc rotates can be fully guaranteed; the safety is embodied; the requirements for flattening and light weight can be met, and the adaptability to different vehicles is improved.

The utility model relates to the technical field of power equipment, in particular to a clamp assembly for a spacer, which comprises a support frame and a workpiece clamp, the support frame comprises at least two support pieces, the two support pieces are connected through a connecting pipe, and the connecting pipe is further connected with the workpiece clamp; the workpiece clamp comprises a frame, a rotating mechanism is arranged at the end, close to the connecting pipe, of the frame, a supporting plate capable of being opened and closed is arranged at the end, away from the connecting pipe, of the frame, and the frame is further provided with a clamping piece capable of sliding between the rotating mechanism and the supporting plate. The supporting frame is used for supporting the whole clamp assembly on the power transmission line, and the clamping piece capable of freely sliding can automatically lift and slide according to different sizes of the spacers so as to abut against and fix the spacers of different models.

The invention relates to a composite material / metal combined type automobile door anti-collision beam structure with an energy absorption box and preparation, and belongs to the technical field of automobile parts, the composite material / metal combined type automobile door anti-collision beam structure comprises a metal anti-collision beam main body, the metal energy absorption box, a double-concave outer arch type thermal forming stamping metal plate and a double-concave outer arch type carbon fiber composite material plate. The cross section of the metal anti-collision beam main body is shaped like a Chinese character'ri ', and a metal foam material foamed aluminum is added in a gap part of the shape like the Chinese character'ri' to serve as an energy absorption core material; the metal anti-collision beam body, the metal energy absorption box and the double-concave outer arch type thermal forming stamping metal plate are fixedly connected in a bolt connection mode. The double-concave outer arch type carbon fiber composite material plate is designed in a variable-angle and variable-thickness layering mode. The automobile door anti-collision beam has good corrosion resistance and excellent mechanical property, the strength of the automobile door structure is improved, and meanwhile the requirements of the current market for automobile light weight, energy conservation and emission reduction are met.

The auxiliary frame comprises an annular composite frame body and a metal connecting piece which is arranged on the frame body and used for being connected with a vehicle in an assembling mode, and the manufacturing method of the auxiliary frame comprises the steps that firstly, a foam core material is machined into a supporting template in the shape of the auxiliary frame body, and a metal insert is arranged on the supporting template; a connecting hole is formed in the metal insert; secondly, a reinforcing frame defined by fiber materials is woven outside the supporting formwork and the metal insert in a three-dimensional weaving mode; and thirdly, resin is injected into the reinforcing frame to be cured to form a composite frame body of the auxiliary frame, and the metal connecting piece is connected to the metal insert before or after resin injection. The formed auxiliary frame is obvious in weight reduction, capable of meeting the requirement for light weight, high in bearing capacity and outstanding in damage tolerance capacity and integrity, and therefore the industrial requirements for high strength, fatigue resistance, integrity and light weight of the automobile auxiliary frame are met.

The invention provides a high-strength complex-section cavity product cutting device which comprises a height adjusting mechanism, a radian adjusting mechanism, a follow-up mechanism and a cutting unit which are sequentially arranged from bottom to top. The cutting-off unit comprises a vertical cutting-off mechanism used for cutting off material belts on the two sides of the cavity product and a horizontal cutting-off mechanism used for cutting off a reinforcing rib structure in the middle of the cavity product. The invention further provides a cutting-off method which comprises the following steps: pre-punching and cutting off a process hole in advance in a material belt before rolling forming, and integrally cutting off a cavity product by adopting a regional secondary cutting-off mode after rolling forming. Follow-up continuous cutting of high-strength complex section type cavity products can be achieved on a rolling line, the cutting efficiency is high, the quality is good, the product rework rate is greatly reduced, and the service life of a cutter is remarkably prolonged; the device is flexible to use and high in universality, and can be adapted to cold-bending profiles with various different section types through replacement of the standard cutting head.

The present invention discloses a titanium alloy and aramid lightweight composite protective plate, comprising alternately distributed titanium alloy plates and aramid plates, wherein the total number of layers of the titanium alloy plates and aramid plates is 3 to 7 layers, and the outermost layer of the protective plate is a titanium alloy plate. In addition, the present invention also provides a method for preparing the titanium alloy and aramid lightweight composite protective plate, wherein the titanium alloy plates and aramid plates are coated with an adhesive and then stacked, and then cured at room temperature and high pressure to obtain a composite protective plate. The present invention adopts a multi-layer composite reinforcement method of titanium alloy and aramid, and by designing the thickness of different materials layer by layer, the advantages of the linear ultra-high strength of the aramid material and the high specific strength of the titanium alloy material are maximized in the ability to resist projectile penetration, and the surface density of the protective plate is greatly reduced.

The application relates to the technical field of composite copper foil preparation, in particular to a PET composite copper foil with high peeling resistance and oxidation resistance and a preparation method thereof. The preparation method of the PET composite copper foil with high peeling resistance and oxidation resistance comprises the following steps: PET composite copper foil preparation and PET composite copper foil composite treatment. In the application, the inert structure of a PET surface is broken through corona treatment, and a polar group is introduced; then, a reinforcing liquid containing a silane coupling agent and nano silicon dioxide sol is coated to form a polar transition layer, so that the interface bonding force and the peeling resistance of the PET and the metal layer are improved through chemical bonding and physical anchoring; then, a layer of oxidation-resistant barrier metal layer is formed by using a physical vapor deposition method; then, the PET composite copper foil is placed in a copper-containing electrolyte, and electrolysis treatment is carried out by electrifying, so that a layer of copper foil is deposited, and the PET composite copper foil is obtained; and finally, the obtained PET composite copper foil is subjected to a surface treatment process.

The utility model relates to the technical field of robots, and discloses a distance measuring device and a robot. The transmitting assembly is arranged on the fixed base, and the transmitting assembly is configured to transmit detection light. The receiving assembly is arranged on the fixed base, and the receiving assembly is configured to receive the reflected light. The rotor assembly is arranged on the rotating support and rotates synchronously with the rotating support. The first circuit board is arranged on the fixed base, a stator winding is printed on the first circuit board, the stator winding and the rotor assembly are oppositely arranged, and when the stator winding is powered on, a magnetic field is generated to drive the rotor assembly to move so as to drive the rotating support to rotate relative to the fixed base. Compared with a stator winding which is relatively large in size and is wound on the stator teeth in the prior art, the distance measuring device provided by the embodiment of the utility model has the advantages that the stator winding is printed on the first circuit board, so that the size of the stator winding is greatly reduced, the thickness of the distance measuring device in the axial direction is particularly reduced, and the requirement of miniaturization of the distance measuring device is met.

The utility model discloses a battery pack support and a vehicle, and relates to the technical field of battery pack supports, the battery pack support comprises two side frames and at least two hanging brackets, the two side frames are respectively used for being installed on the two sides of a battery shell in the length direction, and one side frame is connected with a vehicle frame through at least one hanging bracket. The utility model aims to reduce the weight of the battery pack bracket as much as possible on the premise of meeting the strength and safety performance of the battery pack bracket.

The invention discloses a self-propelled wheel type mechanical rotation anti-sinking device, and relates to the technical field of wheel type anti-sinking devices, the self-propelled wheel type mechanical rotation anti-sinking device comprises a wheel shaft assembly, the wheel shaft assembly comprises a link sleeve and a steel ring link disc, the steel ring link disc is connected with a vehicle tire steel ring, and the link sleeve is welded on the outer surface of the steel ring link disc; and the wheel body assembly is used for supporting an external component. According to the self-propelled wheel type mechanical rotation anti-sinking device, the anti-sinking device is connected with a tire rim of a tractor, the purpose of being synchronous with the rotation direction of a tire of the tractor is achieved, and a hydraulic oil cylinder connected with a hydraulic multi-way valve behind the tractor provides driving force for adjustment; the telescopic rod of the hydraulic oil cylinder is controlled to stretch out and draw back to drive the telescopic supporting arms of the anti-sinking device to stretch out of the outer diameter of a tire to make contact with a hard soil layer, the contact area between the telescopic supporting arms and the ground is greatly increased through the soil shifting plates arranged at the front ends of the telescopic supporting arms, and therefore the anti-sinking and anti-skid effects of the wheeled machine are achieved.

This invention relates to an installation structure for a dual-screen automotive display and a vehicle thereof. The dual-screen installation structure includes an instrument panel body, a steering support body, and a dual-screen body. The instrument panel body has a first mounting point for assembly and fixation with the steering support body. The dual-screen body has a second mounting point corresponding to the first mounting point, enabling co-location of the instrument panel body, steering support body, and dual-screen body. The dual-screen body has a third mounting point for connection with the instrument panel body. This invention also provides a vehicle including the aforementioned dual-screen installation structure. This invention solves the problems of inconvenient assembly and maintenance, high cost, and inability to meet automotive lightweighting requirements in existing dual-screen installation structures, as well as the problem that the dual-screen structure cannot fit snugly against the instrument panel, affecting the overall interior quality.

This invention relates to the field of spacecraft thermal control technology, specifically to a fiber-reinforced flexible composite substrate for deployable space radiators and its preparation method. The method first involves cryogenically treating polyimide fibers with liquid nitrogen, weaving them into a fabric, and then subjecting them to gradient heating and surface carbonization to obtain a carbonized fiber-woven reinforcement. Simultaneously, boron nitride nanosheets and carbon nanotubes are covalently linked via amide bonds and coated with polydopamine to obtain a composite thermally conductive filler, which is then dispersed in polyimide resin. Finally, the resin is impregnated onto the surface of the reinforcement and the interior of the fiber bundles, and then cured to obtain the final product. In this invention, the carbonized layer of the fiber-woven fabric forms thermally conductive channels in both the warp and weft directions, and the composite thermally conductive filler forms a thermally conductive network within the matrix. Together, they construct a dual-network thermally conductive structure, giving the substrate excellent thermal conductivity, flexibility, and lightweight properties, making it suitable for high-power deployable spacecraft radiators.

The utility model relates to the technical field of high-voltage switch equipment, and provides an operating mechanism for a direct-acting isolating switch of a high-voltage switch cabinet, which comprises a rack, an electric driving structure, a manual driving structure, an electric-manual switching selection structure and a switching-on and switching-off signal acquisition structure, wherein the manual driving structure comprises a grounding operation shaft and an isolation operation shaft which are in transmission fit with each other through a gear set, the grounding operation shaft serves as an operation output shaft and is in transmission fit with the electric driving structure, and the opening and closing signal acquisition structure comprises two position confirmation switches, a positioning pressing wheel and a positioning sleeve. The two position confirmation switches are arranged in the circumferential direction of the second linkage shaft, the second linkage shaft is in transmission fit with the isolation operation shaft, the positioning pressing wheel and the positioning sleeve are both installed on the second linkage shaft, and the two position confirmation switches are connected with the positioning pressing wheel and the positioning sleeve respectively so as to output signals outwards. The utility model overcomes the defects of the prior art, and has the advantages of small volume, simple structure, safety and reliability.

The application discloses a single-component dealcoholized sealant and a preparation method and application thereof. The single-component dealcoholized sealant comprises the following raw materials in parts by mass: 80-120 parts of alkoxyl-terminated polydimethylsiloxane; 40-70 parts of surface-modified silica powder; 10-40 parts of flame retardant; 3-12 parts of flame retardant synergist; 3-12 parts of fumed silica; 5-40 parts of plasticizer; 0.5-10 parts of crosslinking agent; 0.5-10 parts of catalyst; and 0.5-10 parts of adhesion promoter. The structural formula of the alkoxyl-terminated polydimethylsiloxane is shown as formula (I): (R1O)3SiCH2CH2[(CH3)2SiO]nSi(CH3)2CH2Si(OR2)3 n Formula (I), wherein R1 and R2 are independently selected from C1-C10 alkyl, and n is 800-2200. The sealant has good storage stability, low hardness and high elongation, low viscosity, good extrudability, no corrosion to PC, fast curing speed, low density and good flame retardancy.

The present invention discloses a method for manufacturing a 6000 series aluminum alloy plate having high forming performance, high flanging performance and low ribbing defects, comprising the following steps: (1) homogenizing an ingot, wherein the homogenizing temperature is 530-580°C; (2) directly performing hot rough rolling, hot finishing rolling and hot final rolling coiling on the homogenized ingot, wherein the hot finishing rolling start temperature is controlled to be 400-480°C, and the hot final rolling coiling temperature is controlled to be above 250°C; (3) cold rolling: wherein the total cold rolling deformation is controlled to be 50-85%, and the average size of the Mg2Si precipitate phase in the obtained cold rolled plate is 1.3-1.7 μm, and the surface density of the Mg2Si precipitate phase is ≥55000 / mm 2 ; (4) solution treatment; (5) pre-aging treatment, followed by air cooling, to obtain a 6000 series aluminum alloy plate. Accordingly, the present invention also discloses a 6000 series aluminum alloy plate obtained by the method.

This invention relates to a thermoforming process for a rear longitudinal beam. This process designs the sidewall surface corresponding to the feature surface at the overlap of the automotive sheet metal rear longitudinal beam and sill beam as an arc shape. This effectively controls the material flow direction, reduces forming friction, and improves wrinkling and cracking phenomena caused by uneven material feeding at the overlap surface. Furthermore, it does not affect the feature surface shape of the rear longitudinal beam, thus achieving a significant improvement in the quality of the corresponding part. Without altering the feature surface shape of the rear longitudinal beam, the sheet metal thickness is reduced, meeting the requirements for automotive lightweighting.

The present invention provides a wireless sensor, a wireless sensor network and an interaction method thereof. The wireless sensor comprises a receiver, a transmitter, a first antenna, a first switch module, a counting control module and a state control module, which controls the receiving and transmitting switch by counting, and the transmitter and the receiver of the wireless sensor can both work temporarily, thereby reducing power consumption; and the wireless sensor transmits and receives and transmits using one antenna, thereby reducing the size of the node, and the wireless sensor node designed in this way consumes little energy, thereby meeting the low power consumption and miniaturization requirements of the node.

The utility model provides a kind of system-level package chip of global satellite navigation, receiver and electronic equipment, can be reused in single antenna full-frequency positioning scene and double antenna three-frequency positioning directional scene, at least package has power module, clock module, GNSS receiver module, storage module and radio frequency front end module in chip, and peripheral interface is provided on chip;Power module is connected with clock module, GNSS receiver module and storage module respectively;Clock module is connected with GNSS receiver module;The input end of radio frequency front end module is connected with external single antenna or double antenna, and the output end of radio frequency front end module is connected with GNSS receiver module;GNSS receiver module is connected with storage module and peripheral interface.The utility model provides system-level package chip high integration, can satisfy the requirement of equipment to miniaturization.

The invention relates to the technical field of railway vehicles, and provides a shaft end transmission device, a wheel set and a bogie, the shaft end transmission device comprises a shaft end spline, a flexible plate and a connecting plate, the shaft end spline is provided with a connecting hole, and a mandrel is inserted into the connecting hole. The flexible plate shaft end spline is connected with the flexible plate through a first connecting piece. One end of the connecting plate is connected with the flexible plate through a second connecting piece, and the other end is connected with the wheel through a third connecting piece. By means of the mode, the end of the mandrel is connected with the shaft end spline and used for transmitting power to wheels, the mandrel is not directly connected with the bogie, force of the bogie and a vehicle body is not directly applied to the mandrel, axial force and pressure borne by the mandrel are greatly reduced, the diameter of the mandrel can be smaller under the condition that the service life of the mandrel is not affected, and the service life of the mandrel is prolonged. And the requirement of light weight is met.

The application provides a manufacturing method of a low-altitude aircraft landing gear cover plate, the landing gear cover plate comprising a cover plate body and an edge connecting part, the cover plate body is designed in a curved surface structure, the edge connecting part is distributed in a U shape along the left side, the right side and the bottom of the cover plate body, is smoothly and transitionally connected with the cover plate body and is in a plate structure, the edge is rounded, mounting holes are formed in the edge connecting part, mounting holes are also formed in the top of the cover plate body near the outer edge, carbon fiber SMC prepreg is used as a raw material for preparation during manufacturing of the landing gear cover plate, a mold is designed (the actual size of the mold cavity is 0.5%-1.0% larger than the actual size of the landing gear cover plate) and a process is controlled (precise control is performed on a forming process, temperature fluctuation is less than or equal to ±1℃, pressure fluctuation is less than or equal to ±0.1MPa, curing time error is less than or equal to ±5s, and a shaping tool cooling mode is adopted), so that the prepared landing gear cover plate is stable in size, easy to assemble and capable of guaranteeing the assembly quality of the low-altitude aircraft and flight safety.

The invention belongs to the technical field of automobile structure design, and discloses a hybrid electric vehicle motor cooling water pump combination device and an automobile provided with the same. The device comprises a frame, an oil tank bracket, a water pump assembly and a storage battery frame with a built-in storage battery, the bottom of the oil tank bracket is lower than the bottom of the frame, and the oil tank bracket and the storage battery frame are respectively fixed with the frame through bolts; the water pump assembly comprises a water pump and a water pump hanging frame, and the water pump hanging frame with the bottom higher than the bottom of the oil tank bracket is fixed to the bottom of the storage battery frame through bolts. The water pump is ingenious in arrangement and simple and reliable in structure, water pump configuration is completed in a narrow space through the structure of a vehicle body, installation and maintenance are convenient, and the requirements for heat dissipation and light weight are met. And the method is suitable for being popularized in the manufacturing industry of hybrid vehicles or extended-range new energy vehicles with narrow spaces.

The present invention provides a wireless sensor, a wireless sensor network and an interaction method thereof. The wireless sensor provided by the embodiment of the invention comprises a receiver, a transmitter, a first antenna, a first switch module, a counting control module and a state control module. The wireless sensor controls the transmitting and receiving switch by a counting method, so that the transmitting and receiving share one antenna, thereby reducing the size of the node. The wireless sensor node designed in this way consumes little energy and meets the low power consumption and miniaturization requirements of the node.

The invention relates to an optical imaging device comprising a lens barrel assembly comprising a first lens barrel and a second lens barrel which are arranged in sequence, and a lens assembly comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens which are arranged along an optical axis from an object side to an image side in sequence; the first lens, the second lens and the third lens are arranged in the first lens barrel, and the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are arranged in the second lens barrel; the optical imaging device satisfies the following relational expressions: 0.1 < T34 / f4 < 0.25; d02s / R7 is more than 0.60 and less than 1.30; 0 < d02s / R6 < = 0.40; according to the optical imaging device, the balance between a large market angle and a small F number is achieved by optimizing the combination of the lenses and the reasonable design of the intervals of the lenses; by optimizing the relation between the inner diameter d02s of the lens barrel and the curvature radiuses R6 and R7 of the lenses in the design process, the geometric matching between the lenses is controlled, the air gap change can be reduced, and the assembly error is reduced.

The invention discloses a seat adjustment structure, comprising an inner slide rail (1), an outer slide rail (2) and a locking mechanism (3), wherein a U-shaped inner tooth hole (1a) is arranged on the side wall of the inner slide rail (1) to form a first locking portion (1b) extending downward, and a plurality of tooth grooves (2a) with lower ends opened are arranged on the side wall of the outer slide rail (2), and a second locking portion (2b) is formed between two adjacent tooth grooves (2a), and the locking mechanism (3) has an annular locking tooth, and a lateral edge thereof passes through the inner tooth hole (1a); the locking tooth can move in a vertical direction to fit the corresponding first locking portion (1b) and the second locking portion (2b), and the inner locking edge (31a) of the locking tooth is rigidly limited with the locking hole end (1aa) of the inner tooth hole (1a), and the outer locking edge (31b) is rigidly limited with the tooth groove (2a) to realize the locking function; the locking tooth can also be separated from the corresponding second locking portion (2b) to realize the unlocking function. The invention also provides a seat assembly. The present invention can effectively improve the riding comfort of customers.

The utility model discloses a transformer oil tank and a transformer thereof, and the transformer oil tank comprises a tank body which is of a hollow box-shaped structure formed by bending an aluminum alloy plate; the top plate is fixedly connected with the top of the box body; the bottom plate is fixedly connected with the bottom of the box body; the mounting frame assembly is fixedly arranged on the outer side of the box body; and the fastening mechanism is arranged on the bottom plate and is used for fixing the heavy components in the box body with the bottom plate. According to the transformer oil tank and the transformer thereof, compared with the prior art, the requirements for light weight and miniaturization of the vehicle transformer can be met.

The utility model relates to the technical field of flywheel shells, in particular to a heavy-duty truck flywheel shell which comprises a flywheel shell body, the inner side face of the flywheel shell body is a gearbox installation face, the outer side face of the flywheel shell body is a transmitter installation face, and engine rear supporting installation frames are arranged on the left side and the right side of the flywheel shell body. First lightening holes are formed in the engine rear supporting installation frame in the left-right direction and the front-back direction, first reinforcing ribs are arranged in the first lightening holes, and a plurality of engine installation holes are formed in the middle of the flywheel shell body. A second reinforcing rib is arranged on the inner side of the flywheel housing body at the edge of the engine mounting hole; arc-shaped and radial third reinforcing ribs are arranged on the inner side of the flywheel casing body; arc-shaped and radial fourth reinforcing ribs are arranged on the outer side of the flywheel housing body; by arranging various lightening holes and reinforcing ribs, the flywheel casing of the heavy-duty truck can be lighter on the basis of ensuring the strength, and the requirement of light weight is met.

A multifunctional light-shading and air-releasing device for a spacecraft comprises a tubular structure with an air-releasing hole and a flange structure, a light-shading cover is of a flanging cover plate structure, a cover plate is a plane, a flanging is of a side-standing short-edge structure formed by machining along the outer edge curve of the cover plate, and the light-shading cover covers the end, provided with the air-releasing hole, of the tubular structure; the flange structure is located at the other end of the tubular structure, is matched with the radian of the bearing cylinder and is used for tightly attaching the device to the outer wall of the bearing cylinder; the light-shading and air-releasing device adopts an integrally-formed processing mode, has the advantages of integration, multiple functions, simple structure, light weight, convenience in installation and the like, and is well applied to spacecrafts.

The present invention relates to the technical field of heat dissipation of battery packs, and discloses a multi-layer heat dissipation structure for a battery pack, comprising: a carrying box, which comprises a box body and a box cover matched therewith, wherein the inner cavity of the box body is divided into a carrying area and a heat dissipation area from top to bottom; the heat dissipation area is provided with a water cooling mechanism and an air cooling mechanism, and the air cooling mechanism is located below the water cooling mechanism; a partition plate is provided with a plurality of groups, which are plugged into the top side wall of the water cooling mechanism and limited to the edge side wall of the box body; in the present invention, by improving the box structure for accommodating the battery pack, the box body has the heat dissipation modes of natural cooling, water cooling and air cooling, and the overall structure of the carrying box is simple, which meets the requirements of lightweight, is easy to install the battery pack, meets different heat dissipation requirements, and has excellent structural characteristics.