New energy automobile battery pack heat dissipation structure additive manufacturing preheating device

Abstract

The invention relates to the technical field of plastic processing, and discloses a new energy automobile battery pack heat dissipation structure additive manufacturing preheating device which comprises a preheating box, a rotating mechanism is arranged at the bottom of the preheating box, a lifting mechanism is arranged in the preheating box, and a hollow connector is arranged on the rotating mechanism. And two grooves are symmetrically formed in the hollow connector, a preheating disc is fixedly connected to the outer wall of the top of the hollow connector, and a concentric circle stepped groove is formed in the top of the preheating disc. Additive raw materials are placed in the concentric circle stepped groove of the preheating disc, and the placing disc is rotated, so that the additive raw materials can be intermittently and flatly laid on all kicking surfaces of the concentric circle stepped groove under the cooperation of centrifugal force generated when the fan-shaped stepped plate and the preheating disc rotate, the accumulation condition of the additive raw materials is avoided, and the service life of the additive raw materials is prolonged. Therefore, the additive raw materials are fully heated, and the phenomenon that the additive raw materials are heated unevenly is completely eradicated.

Description

Technical Field

[0001] The present invention relates to the field of plastic processing technology, and in particular to a preheating device for additive manufacturing of a heat dissipation structure of a battery pack for a new energy vehicle. Background Art

[0002] Plastic materials are widely used in the structure of new energy vehicle battery packs due to their excellent electrical insulation properties, mechanical properties, thermal stability and chemical corrosion resistance.

[0003] The Chinese patent with patent announcement number CN115366328B discloses an injection molding device for a battery bracket for new energy vehicles with flame retardant function, which includes: an injection molding machine; an upper machine base, fixed to one side of the upper end surface of the injection molding machine, and a fixed mold frame is vertically fixed to one side of the upper machine base; a hydraulic telescopic cylinder, horizontally installed on the upper machine base, and a movable plate is installed at the output end of the hydraulic telescopic cylinder; four limit bars, which are respectively slidably connected to the four corners of the fixed mold frame, and one end of the four limit bars close to the hydraulic telescopic cylinder is fixed to the movable plate; the movable mold frame is installed on the limit One end of the bar is away from the movable plate; the inner bracket mold is configured as two, and is respectively arranged on each of the fixed mold frame and the movable mold frame, and the two inner bracket molds are sealed and connected with each other; the upper injection molding component and the lower injection molding component are both installed on the injection molding machine table, and are located above and below the inner bracket mold. The plastic particle raw materials are generally stored in a dry, ventilated and sun-shaded warehouse, and the temperature in the warehouse is relatively low. If these plastic particle raw materials are directly hot-melted through the hot melt mechanism of the injection molding machine, the temperature in the hot melt mechanism will drop, thereby affecting the hot melt effect of the plastic particle raw materials.

[0004] In view of this, the present invention proposes an additive manufacturing preheating device for the heat dissipation structure of a new energy vehicle battery pack to solve the problems existing in the above-mentioned prior art. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a preheating device for additive manufacturing of the heat dissipation structure of a new energy vehicle battery pack.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack comprises a preheating box, a rotating mechanism is provided at the bottom of the preheating box, and a lifting mechanism is provided inside the preheating box, a hollow connector is provided on the rotating mechanism, and two grooves are symmetrically provided inside the hollow connector, a preheating disk is fixedly connected to the outer wall of the top of the hollow connector, and a concentric stepped groove is provided on the top of the preheating disk, the height of the concentric stepped groove increases from the inside to the outside, the height increase each time is the same, and the concentric stepped groove has no less than 4 layers, an L-shaped frame is provided on the lifting mechanism, and a fan-shaped step plate is fixedly connected to the outer wall of the bottom of the L-shaped frame, the axis of the fan-shaped step plate coincides with the axis of the concentric step groove, and the fan-shaped step plate cooperates with the concentric step groove, and the top outer wall of the fan-shaped step plate is provided with a raised edge.

[0008] Furthermore, the lifting mechanism includes a threaded rod 1, which is sealed and rotatably connected to the inside of the preheating box, and a servo motor is provided at the top of the threaded rod 1. The outer wall of the threaded rod 1 is threadedly slidably connected to a threaded slider, and the L-shaped frame is fixedly connected to the outer wall of one side of the threaded slider.

[0009] Furthermore, the rotating mechanism includes a drive shaft, which is sealed and rotatably connected to the bottom of the preheating box, and two protrusions are symmetrically fixedly connected to the outer wall above the drive shaft. The drive shaft and the hollow connector, the protrusions and the grooves are gap-matched.

[0010] Furthermore, a fixing frame is fixedly connected to the outer wall of the bottom of the preheating box, and a rotating motor is provided on the fixing frame. The output shaft end of the rotating motor is fixedly connected to a driving gear, and a driven gear 1 is engaged with one side of the driving gear. The driven gear 1 is fixedly connected to the outer wall of the bottom of the driving shaft.

[0011] Furthermore, each tread of the fan-shaped step plate is provided with an arc-shaped protrusion in the middle, and an arc-shaped groove is opened directly below each arc-shaped protrusion. Each riser of the fan-shaped step plate is rotatably connected to a rotating column, and each rotating column is located in the corresponding arc-shaped groove.

[0012] Furthermore, an arc-shaped scraper is fixedly connected to the outer wall of one side of each rotating column, and a swing plate is fixedly connected to the top outer wall of the other side of the rotating column away from the arc-shaped scraper. The swing plate is perpendicular to the horizontal plane, and a hook spring is provided between each swing plate and the top outer wall of the fan-shaped step plate.

[0013] Furthermore, an installation cavity is provided inside the L-shaped frame, and one end of the installation cavity is rotatably connected to a rotating shaft, a plurality of toggle plates are fixedly connected to the bottom outer wall of one side of the rotating shaft at equal distances, and each toggle plate is in contact with the outer wall of the corresponding swing plate, and a driven gear 2 is fixedly connected to the outer wall of the other side of the rotating shaft, and a rack is engaged under the driven gear 2, the rack is slidably connected to the bottom inner wall of the installation cavity, and a threaded rod 2 is threadedly slidably connected to one side of the installation cavity, one end of the threaded rod 2 is fixedly connected to a knob, and the other end of the threaded rod 2 is rotatably connected to the rack.

[0014] Furthermore, a circular corrugated plate is fixedly connected to the outer wall of the bottom of the preheating plate, and a plurality of suction cylinders are equidistantly arranged on the inner wall of the bottom of the preheating box, and the tops of the suction cylinders are slidably connected to pressing rods, and the tops of the pressing rods are provided with balls, and the balls are in contact with the outer wall of the bottom of the circular corrugated plate, and the bottom end of the pressing rod is fixedly connected to a piston disk, and the piston disk is sealingly and slidably connected to the inside of the suction cylinder, and a return spring is fixedly connected between the piston disk and the inner wall of the bottom of the suction cylinder.

[0015] Furthermore, a one-way air suction pipe is provided on the outer wall on one side below the air cylinder, and a one-way air supply pipe is provided on the outer wall on the other side below the air cylinder, and one end of the one-way air supply pipe is connected to the same annular pipe.

[0016] Furthermore, each tread of the concentric stepped groove is symmetrically provided with a plurality of heat dissipation holes, and a sealing cover is provided on the heat dissipation hole. The top of each sealing cover is connected to a branch pipe, and the top of the branch pipes in the same row is provided with the same delivery pipe, and a high-temperature resistant hose is connected between the delivery pipe and the annular pipe.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention places the additive raw material in the concentric stepped grooves of the preheating disk and rotates the placement disk. As a result, the centrifugal force generated by the rotation of the fan-shaped step plate and the preheating disk cooperates to make the additive raw material intermittently spread on each riser of the concentric stepped grooves, thereby avoiding the accumulation of the additive raw material, so that the additive raw material is fully heated and the phenomenon of uneven heating of the additive raw material is eliminated.

[0019] 2. The present invention provides an arc-shaped scraper to turn over the additive raw material laid flat in the gap between the fan-shaped step plate and the concentric step groove, so that all surfaces of the additive raw material can be heated, avoiding uneven heating caused by local overheating.

[0020] 3. The present invention can absorb the high-temperature gas in the preheating box through the suction cylinder, and then spray it onto the additive raw material in the gap between the fan-shaped step plate and the concentric step groove, greatly improving the preheating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack proposed in Example 1;

[0022] Figure 2 This is a schematic diagram of the preheating plate structure of a preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack proposed in Example 1;

[0023] Figure 3 This is a schematic diagram of the hollow connector structure of an additive manufacturing preheating device for a heat dissipation structure of a new energy vehicle battery pack proposed in Example 1;

[0024] Figure 4 This is a schematic diagram of the fan-shaped stepped plate structure of a preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack proposed in Example 1;

[0025] Figure 5 This is a schematic diagram of the bottom structure of the fan-shaped stepped plate of a preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack proposed in Example 1;

[0026] Figure 6 This is a schematic cross-sectional structure diagram of an L-shaped frame of an additive manufacturing preheating device for a heat dissipation structure of a new energy vehicle battery pack proposed in Example 1;

[0027] Figure 7 This is a schematic structural diagram of a preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack proposed in Example 2;

[0028] Figure 8 This is a schematic diagram of the fan-shaped stepped plate structure of a preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack proposed in Example 2;

[0029] Figure 9 This is a schematic diagram of the cross-sectional structure of the air intake of an additive manufacturing preheating device for the heat dissipation structure of a new energy vehicle battery pack proposed in Example 2.

[0030] Figure: 1, preheating box; 2, threaded rod 1; 3, threaded slider; 4, servo motor; 5, L-shaped frame; 6, preheating plate; 7, hollow connector; 8, bump; 9, drive shaft; 10, drive gear; 11, fixed frame; 12, rotating motor; 13, driven gear 1; 14, groove; 15, arc-shaped protrusion; 16, fan-shaped step plate; 17, hook spring; 18, swing plate; 19, rotating shaft; 20, toggle plate; 21, raised edge; 22 , curved scraper; 23, rotating column; 24, curved groove; 25, knob; 26, rack; 27, mounting cavity; 28, driven gear 2; 29, threaded rod 2; 30, suction cylinder; 31, annular tube; 32, circular corrugated plate; 33, sealing cover; 34, high temperature resistant hose; 35, delivery pipe; 36, branch pipe; 37, one-way air delivery pipe; 38, piston disc; 39, pressing rod; 40, ball; 41, return spring; 42, one-way suction pipe. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be further described in detail below in conjunction with specific implementation methods.

[0032] Example 1, with reference to Figures 1-6, a new energy vehicle battery pack heat dissipation structure additive manufacturing preheating device, including a preheating box 1, a rotating mechanism is provided at the bottom of the preheating box 1, and a lifting mechanism is provided inside the preheating box 1, a hollow connector 7 is provided on the rotating mechanism, and two grooves 14 are symmetrically provided inside the hollow connector 7, a preheating plate 6 is fixedly connected to the outer wall of the top of the hollow connector 7, and a concentric stepped groove is provided on the top of the preheating plate 6, the height of the concentric stepped groove increases from the inside to the outside, the height of each increase is the same, and the concentric stepped groove is not less than 4 layers, an L-shaped frame 5 is provided on the lifting mechanism, and a fan-shaped stepped plate 16 is fixedly connected to the outer wall of the bottom of the L-shaped frame 5, the fan The axis line of the fan-shaped step plate 16 coincides with the axis line of the concentric step groove, and the fan-shaped step plate 16 cooperates with the concentric step groove. The outer wall of the top of the fan-shaped step plate 16 is provided with a raised edge 21. First, according to the type and size of the additive raw material, the fan-shaped step plate 16 is moved downward by the lifting mechanism, and the distance between the fan-shaped step plate 16 and the concentric step groove is adjusted so that the additive raw material can be spread into the gap formed by each tread of the fan-shaped step plate 16 and the concentric step groove. Then, the additive raw material to be preheated is poured into the concentric step groove on the preheating plate 6. After closing the preheating box 1, the preheating work is started. At the same time, by rotating The rotating mechanism causes the preheating disk 6 to rotate rapidly, and then the fan-shaped step plate 16 is controlled to move downward by the lifting mechanism; and when the rotating mechanism causes the preheating disk 6 to rotate rapidly, a large centrifugal force is generated, which causes the additive raw materials to accumulate on the lowest kick surface in the concentric step groove. When the additive raw materials accumulate too much and overflow the kick surface, most of the additive raw materials will accumulate on another kick surface above the kick surface under the action of centrifugal force, and the cycle will continue. When the preheating disk 6 rotates, the additive raw materials in the concentric step grooves will accumulate on each kick surface, and at the same time, during the rotation of the preheating disk 6, the raised edges 21 of the fan-shaped step plate 16 will contact with the kick surfaces at various places. The raised edges 21 can scrape off excess additive materials so that the additive materials can be spread into the gaps between the fan-shaped step plates 16 and the treads of the concentric step grooves. When these spread additive materials leave the fan-shaped step plates 16, they will be accumulated on the risers again under the action of the centrifugal force generated when the preheating disk 6 rotates. This cycle can automatically turn the preheated additive materials over and can be spread back and forth on the treads of the concentric step grooves to avoid the accumulation of additive materials. This will fully heat the additive materials and prevent uneven heating of the additive materials.

[0033] As a further solution in the present invention, the lifting mechanism includes a threaded rod 2, which is sealed and rotatably connected to the inside of the preheating box 1, and a servo motor 4 is provided at the top of the threaded rod 2. The outer wall of the threaded rod 2 is threadedly slidably connected to a threaded slider 3, and an L-shaped frame 5 is fixedly connected to the outer wall of one side of the threaded slider 3. The servo motor 4 can make the threaded rod 2 connected thereto rotate forward or reverse, and can make the threaded slider 3 move up and down, so that the fan-shaped step plate 16 under the L-shaped frame 5 moves synchronously.

[0034] As a further solution in the present invention, the rotating mechanism includes a drive shaft 9, which is sealed and rotatably connected to the bottom of the preheating box 1, and two protrusions 8 are symmetrically fixedly connected to the outer wall above the drive shaft 9. The drive shaft 9 and the hollow connector 7, the protrusions 8 and the grooves 14 are clearance-matched, and the hollow connector 7 and the drive shaft 9 can be separated, which facilitates the processing of the additive raw materials in the preheating tray 6.

[0035] As a further solution in the present invention, a fixing frame 11 is fixedly connected to the outer wall of the bottom of the preheating box 1, and a rotating motor 12 is provided on the fixing frame 11. The output shaft end of the rotating motor 12 is fixedly connected to the driving gear 10, and a driven gear 13 is engaged with one side of the driving gear 10. The driven gear 13 is fixedly connected to the outer wall of the bottom of the driving shaft 9. The rotating motor 12 can rotate the driving gear 10. Since the driving gear 10 is engaged with the driven gear 13 at the bottom of the driving shaft 9, the preheating disk 6 can be rotated rapidly.

[0036] As a further solution in the present invention, an arc-shaped protrusion 15 is provided in the middle of each tread of the fan-shaped step plate 16, and an arc-shaped groove 24 is opened directly below each arc-shaped protrusion 15. Each riser of the fan-shaped step plate 16 is rotatably connected to a rotating column 23, and each rotating column 23 is located in the corresponding arc-shaped groove 24.

[0037] As a further solution in the present invention, the outer wall of one side of each rotating column 23 is fixedly connected to an arc scraper 22, and the top outer wall of the other side of the rotating column 23 away from the arc scraper 22 is fixedly connected to a swing plate 18, the swing plate 18 is perpendicular to the horizontal plane, and a hook spring 17 is provided between each swing plate 18 and the top outer wall of the fan-shaped step plate 16.

[0038] As a further solution in the present invention, an installation cavity 27 is provided inside the L-shaped frame 5, and one end of the installation cavity 27 is rotatably connected to the rotating shaft 19, and a plurality of toggle plates 20 are fixedly connected to the outer wall of the bottom of one side of the rotating shaft 19 at equal distances, and each toggle plate 20 is in contact with the outer wall of the corresponding swing plate 18, and the outer wall on the other side of the rotating shaft 19 is fixedly connected to the driven gear 28, and the driven gear 28 is meshed with a rack 26 below, and the rack 26 is slidably connected to the inner wall of the bottom of the installation cavity 27, and the installation cavity One side of 27 is connected to a threaded rod 29 in a sliding manner, one end of the threaded rod 29 is fixedly connected to a knob 25, and the other end of the threaded rod 29 is rotatably connected to the rack 26. When the distance between the sector-shaped step plate 16 and the concentric step groove is adjusted, the length of the threaded rod 29 extending out of the L-shaped frame 5 is lengthened by turning the knob 25. In this process, the rack 26 is pulled to move in the direction of the knob 25, because the driven gear 28 on the rotating shaft 19 is engaged with the rack 26, thereby When the preheating plate 6 moves, the rotating shaft 19 rotates, so that each toggle plate 20 on the rotating shaft 19 exerts force on the corresponding swing plate 18, causing it to pull the hook spring 17 to deflect. At this time, the rotating column 23 under each swing plate 18 drives the arc scraper 22 to rotate until the bottom end of each arc scraper 22 contacts the tread of the corresponding concentric step groove. When the preheating plate 6 rotates, the arc scraper 22 can scoop up the dirt laid flat on the treads of the fan-shaped step plate 16 and the concentric step groove to form a The additive raw materials in the gap are made to move along the surface of the arc scraper 22. A bulge is formed at the connection between the arc scraper 22 and the rotating column 23. When the additive raw materials moving along the surface of the arc scraper 22 encounter the bulge, they can be bounced up and turned over. Therefore, by setting the arc scraper 22, the additive raw materials spread in the gap between the fan-shaped step plate 16 and the concentric step groove can be turned over, so that all sides of the additive raw materials can be heated, avoiding local overheating and uneven heating.

[0039] Working principle: First, according to the type and size of the additive raw material, the fan-shaped step plate 16 is moved downward by the lifting mechanism, and the distance between the fan-shaped step plate 16 and the concentric step groove is adjusted so that the additive raw material can be spread flatly into the gap formed by the fan-shaped step plate 16 and the treads of the concentric step groove. Then, the additive raw material to be preheated is poured into the concentric step groove on the preheating disk 6. After closing the preheating box 1, the preheating work is started. At the same time, the preheating disk 6 is rotated rapidly by the rotating mechanism, and then the fan-shaped step plate 16 is controlled to move downward by the lifting mechanism. When the rotating mechanism causes the preheating disk 6 to rotate rapidly, a large centrifugal force is generated, which causes the additive raw material to accumulate at the lowest kick surface in the concentric step groove. When the additive raw material accumulates too much and overflows the kick surface, most of the additive raw material will accumulate on another kick surface above the kick surface under the action of centrifugal force. The cycle continues in this way, so that when the preheating disk 6 rotates, the additive raw materials in the concentric step grooves will accumulate on each riser surface. At the same time, during the rotation of the preheating disk 6, the raised edges 21 of the fan-shaped step plate 16 will contact the additive raw materials accumulated on the risers. Under the action of the raised edges 21, the excess additive raw materials can be scraped off, so that the additive raw materials can be spread flat on the gaps formed by the fan-shaped step plate 16 and the treads of the concentric step grooves. When these spread additive raw materials leave the fan-shaped step plate 16, they will be accumulated on each riser surface again under the action of the centrifugal force generated when the preheating disk 6 rotates. This cycle repeats itself, which can automatically turn over the preheated additive raw materials and can be spread back and forth on each tread of the concentric step grooves to avoid the accumulation of additive raw materials, thereby fully heating the additive raw materials and eliminating the phenomenon of uneven heating of the additive raw materials.

[0040] Example 2, reference Figure 7-Figure 9 , a new energy vehicle battery pack heat dissipation structure additive manufacturing preheating device, compared with Example 1, on the basis of Example 1, the bottom outer wall of the preheating disk 6 is fixedly connected to a circular corrugated plate 32, and a plurality of air suction cylinders 30 are equidistantly arranged on the bottom inner wall of the preheating box 1, and the top of the air suction cylinder 30 is slidably connected to a pressing rod 39, and the top of the pressing rod 39 is provided with a ball 40, and the ball 40 contacts the bottom outer wall of the circular corrugated plate 32, and the bottom end of the pressing rod 39 is fixedly connected to a piston disk 38, and the piston disk 38 is sealingly slidably connected to the inside of the air suction cylinder 30, and a return spring 41 is fixedly connected between the piston disk 38 and the bottom inner wall of the air suction cylinder 30. The preheating disk 6 will rotate synchronously with the circular corrugated plate 32 at its bottom. Because the circular corrugated plate 32 is wavy, and the ball 40 on the top of the pressing rod 39 contacts the bottom outer wall of the circular corrugated plate 32, so that during the rotation process, the piston disk 38 inside the air suction cylinder 30 slides back and forth through cooperation with the return spring 41.

[0041] As a further solution in the present invention, a one-way suction pipe 42 is provided on the outer wall on one side below the suction cylinder 30, and a one-way gas supply pipe 37 is provided on the outer wall on the other side below the suction cylinder 30. One end of the one-way gas supply pipe 37 is connected to the same annular pipe 31. When the piston disc 38 is in the lowest position, the piston disc 38 will still be above the one-way suction pipe 42 and the one-way gas supply pipe 37, so that when the piston disc 38 slides back and forth up and down, it can continuously absorb the high-temperature gas in the preheating box 1 and then input the high-temperature gas into the annular pipe 31.

[0042] As a further solution in the present invention, each tread of the concentric stepped groove is symmetrically provided with a plurality of heat dissipation holes, and a sealing cover 33 is provided on the heat dissipation hole. The top of each sealing cover 33 is connected to a branch pipe 36, and the top of the branch pipes 36 located in the same row is provided with the same delivery pipe 35. The delivery pipe 35 and the annular tube 31 are connected by a high-temperature resistant hose 34. The gas in the annular tube 31 will enter the corresponding delivery pipe 35 through the two high-temperature resistant hoses 34 respectively, and then enter the corresponding sealing cover 33 through each branch pipe 36. Then the high-temperature gas is blown through the heat dissipation holes below the sealing cover 33 to the additive raw material in the gap between the fan-shaped step plate 16 and the concentric stepped groove, thereby greatly improving the preheating efficiency.

[0043] Working principle: The preheating plate 6 will rotate synchronously with the circular wave plate 32 at its bottom. Because the circular wave plate 32 is wavy, and the ball 40 on the top of the pressing rod 39 contacts the outer wall of the bottom of the circular wave plate 32, during the rotation, through the cooperation with the return spring 41, the piston plate 38 inside the suction cylinder 30 slides back and forth. When the piston plate 38 is at the lowest position, the piston plate 38 is still above the one-way suction pipe 42 and the one-way gas supply pipe 37. As the piston plate 38 slides back and forth, it can continuously absorb the high-temperature gas in the preheating box 1 and then input the high-temperature gas into the annular pipe 31. Then, the gas in the annular pipe 31 will enter the corresponding delivery pipe 35 through two high-temperature resistant hoses 34 respectively, and then enter the corresponding sealing cover 33 through each branch pipe 36. Then, the high-temperature gas is blown through the heat dissipation holes below the sealing cover 33 to the additive raw material in the gap between the fan-shaped stepped plate 16 and the concentric stepped groove, greatly improving the preheating efficiency.

[0044] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack, comprising a preheating box (1), a rotating mechanism being provided at the bottom of the preheating box (1), and a lifting mechanism being provided inside the preheating box (1), characterized in that: The rotating mechanism is provided with a hollow connector (7), and two grooves (14) are symmetrically provided inside the hollow connector (7); the top outer wall of the hollow connector (7) is fixedly connected to a preheating disk (6), and a concentric stepped groove is provided on the top of the preheating disk (6); the height of the concentric stepped groove increases from the inside to the outside, and the height increases each time, and the concentric stepped groove is not less than 4 layers; the lifting mechanism is provided with an L-shaped frame (5), and the bottom outer wall of the L-shaped frame (5) is fixedly connected to a fan-shaped step plate (16); the axis of the fan-shaped step plate (16) coincides with the axis of the concentric stepped groove, and the fan-shaped step plate (16) cooperates with the concentric stepped groove; the top outer wall of the fan-shaped step plate (16) is provided with a raised edge (21).

2. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 1, characterized in that: The lifting mechanism comprises a threaded rod (2), the threaded rod (2) is sealed and rotatably connected to the inside of the preheating box (1), and a servo motor (4) is provided at the top of the threaded rod (2), a threaded slider (3) is threadedly slidably connected to the outer wall of the threaded rod (2), and the L-shaped frame (5) is fixedly connected to the outer wall of one side of the threaded slider (3).

3. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 1, characterized in that: The rotating mechanism comprises a driving shaft (9), the driving shaft (9) is sealed and rotatably connected to the bottom of the preheating box (1), and two protrusions (8) are symmetrically fixedly connected to the outer wall above the driving shaft (9), and the driving shaft (9) and the hollow connector (7), and the protrusions (8) and the grooves (14) are clearance-matched.

4. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 3, characterized in that: The bottom outer wall of the preheating box (1) is fixedly connected to a fixing frame (11), and a rotating motor (12) is provided on the fixing frame (11). The output shaft end of the rotating motor (12) is fixedly connected to a driving gear (10), and one side of the driving gear (10) is meshed with a driven gear (13), and the driven gear (13) is fixedly connected to the bottom outer wall of the driving shaft (9).

5. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 1, characterized in that: Each tread of the fan-shaped step plate (16) is provided with an arc-shaped protrusion (15) in the middle, and an arc-shaped groove (24) is provided directly below each arc-shaped protrusion (15); each kick surface of the fan-shaped step plate (16) is rotatably connected to a rotating column (23), and each rotating column (23) is located in a corresponding arc-shaped groove (24).

6. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 5, characterized in that: The outer wall of one side of each rotating column (23) is fixedly connected to an arc-shaped scraper (22), and the top outer wall of the other side of the rotating column (23) away from the arc-shaped scraper (22) is fixedly connected to a swing plate (18), the swing plate (18) is perpendicular to the horizontal plane, and a hook spring (17) is provided between each swing plate (18) and the top outer wall of the fan-shaped step plate (16).

7. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 6, characterized in that: The L-shaped frame (5) is provided with a mounting cavity (27) inside, and one end of the mounting cavity (27) is rotatably connected to a rotating shaft (19), a plurality of toggle plates (20) are fixedly connected to the outer wall of the bottom of one side of the rotating shaft (19) at equal distances, and each toggle plate (20) is in contact with the outer wall of the corresponding swing plate (18), the outer wall of the other side of the rotating shaft (19) is fixedly connected to a driven gear 2 (28), and a rack (26) is meshed below the driven gear 2 (28), the rack (26) is slidably connected to the inner wall of the bottom of the mounting cavity (27), and a threaded rod 2 (29) is threadedly slidably connected to one side of the mounting cavity (27), one end of the threaded rod 2 (29) is fixedly connected to a knob (25), and the other end of the threaded rod 2 (29) is rotatably connected to the rack (26).

8. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 1, characterized in that: The outer wall of the bottom of the preheating plate (6) is fixedly connected to a circular wave plate (32); a plurality of suction cylinders (30) are arranged at equal distances on the inner wall of the bottom of the preheating box (1); and the top of the suction cylinder (30) is slidably connected to a pressing rod (39); the top of the pressing rod (39) is provided with a ball (40), and the ball (40) contacts the outer wall of the bottom of the circular wave plate (32); the bottom end of the pressing rod (39) is fixedly connected to a piston disk (38), and the piston disk (38) is sealingly slidably connected to the inside of the suction cylinder (30); and a return spring (41) is fixedly connected between the piston disk (38) and the inner wall of the bottom of the suction cylinder (30).

9. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 8, characterized in that: A one-way air suction pipe (42) is provided on the outer wall on one side below the air suction cylinder (30), and a one-way air delivery pipe (37) is provided on the outer wall on the other side below the air suction cylinder (30). One end of the one-way air delivery pipe (37) is connected to the same annular pipe (31).

10. The preheating device for additive manufacturing of a heat dissipation structure of a new energy vehicle battery pack according to claim 9, characterized in that: Each tread of the concentric stepped groove is symmetrically provided with a plurality of heat dissipation holes, and a sealing cover (33) is provided on each heat dissipation hole. The top of each sealing cover (33) is connected to a branch pipe (36), and the tops of the branch pipes (36) located in the same row are all provided with the same delivery pipe (35). A high-temperature resistant hose (34) is connected between the delivery pipe (35) and the annular pipe (31).

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