Multifunctional laser grooving device for passivation treatment

Abstract

The invention discloses a multifunctional laser grooving device for passivation treatment. The multifunctional laser grooving device comprises a rack; the conveying assembly comprises a driving unit and two conveying belts; the two feeding and discharging assemblies are arranged at the two ends of the conveying assembly correspondingly, and each feeding and discharging assembly comprises a lifting unit and a flower basket; a laser irradiation device; and the material overturning assembly comprises a material overturning groove and a switching unit, and the switching unit is used for switching the material overturning groove to the feeding station, the discharging station or the avoiding station. According to the multifunctional laser grooving device for passivation treatment, batched battery pieces are placed on the conveying assembly one by one through the feeding and discharging assembly, the grooved battery pieces are collected one by one, the contact faces of the battery pieces and the conveying assembly can be adjusted through the material overturning assembly, and meanwhile a material overturning groove can move to an avoiding station; and in cooperation with a laser device, single-face grooving and double-face grooving are achieved, the machining efficiency is improved, and damage caused by battery piece extrusion is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of solar cell passivation treatment, in particular to a multifunctional laser grooving device for passivation treatment. Background Art

[0002] In the passivation process of solar cells, laser grooving is usually required to remove the local passivation film (such as aluminum oxide passivation film), so as to form an aluminum back field in the local area and lead the current from one side of the cell to form the battery electrode. Compared with other grooving methods, laser grooving can accurately control the depth and width of the grooving without destroying the silicon crystal structure, reduce damage to the cell, and ensure its stability and efficiency.

[0003] In the prior art, a Chinese patent document with the announcement number CN219324880U discloses a laser grooving device for double-sided passivation of solar cells. By moving the third bolt, the rotation of the rotating fixture is achieved, and then the flipping of the solar panel is achieved, which makes it convenient for the laser device to perform grooving on both sides of the solar panel. The dust and waste generated during the grooving process are collected by the dust collection device, which is safe and environmentally friendly.

[0004] However, when the above-mentioned device is used, it is necessary to manually use a rotating clamp to clamp the battery panel firmly and perform operations such as flipping. Since the single piece is manually controlled one by one, the operation is cumbersome and it is impossible to quickly groove a batch of battery cells. Moreover, when the rotating clamp is used to clamp the battery panel, due to the poor structural strength of the battery cell itself, an extrusion force is applied to the battery cell during the clamping process, and the laser groove damages the surface structure of the battery cell, further reducing the structural strength of the battery cell, causing the battery cell to be easily broken and damaged during the processing. Moreover, during the processing, the groove positions of the two sides of the battery cell overlap due to the laser device, resulting in too low thickness of the grooved part of the battery cell, reducing the structural strength of the battery cell and making the battery cell easy to be damaged. In addition, during the laser groove process, the high energy density of the laser beam causes the surface of the battery cell to absorb light energy and quickly convert it into heat energy, resulting in a sharp increase in local temperature. The high temperature causes local melting and thermal expansion of the battery cell, affecting the accuracy and edge quality of the grooves, and the thermal stress of the temperature gradient may cause cracks on the surface or inside of the battery cell, reducing the mechanical and electrical properties of the battery cell.

[0005] Therefore, it is necessary to improve the laser grooving device used for passivation treatment in the prior art. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects in the prior art and provide a multifunctional laser grooving device for passivation treatment that improves processing efficiency and processing quality, reduces damage to the battery cell structure, and avoids damage to the battery cell.

[0007] In order to achieve the above technical effects, the technical solution of the present invention is: a multifunctional laser grooving device for passivation treatment, comprising: frame; A transmission component, the transmission component comprises a driving unit and two transmission belts arranged side by side in a horizontal direction, the transmission direction and the distribution direction of the two transmission belts are respectively a first direction and a second direction, the second direction and the second direction are both horizontal and perpendicular, the distance between the two sides of the two transmission belts away from each other is less than the width of the battery sheet, and the driving unit drives the two transmission belts to rotate at the same speed along their own circumferential direction; A loading and unloading assembly, wherein two loading and unloading assemblies are provided and are respectively arranged at both ends of the transmission assembly, wherein the loading and unloading assemblies include a lifting unit arranged on the frame and a flower basket detachably connected to the output end of the lifting unit, wherein the flower basket includes a bearing unit arranged on both sides of the transmission assembly, wherein the bearing unit includes a vertical bar extending in a vertical direction and support bars arranged on the vertical bar and spaced apart along the length direction of the vertical bar; A laser irradiation device, the laser irradiation device is located directly above the transmission component, and the laser irradiation device irradiates a laser beam distributed between the two transmission belts along a second direction downward; A material turning component, wherein the material turning component is arranged between the laser irradiation device and one end of the transmission component, the material turning component comprises a material turning trough and a switching unit, the material turning trough extends along the second direction, the switching unit is used to switch the material turning trough to a loading station, an unloading station or an avoidance station, at the loading station, the material turning trough faces the laser beam irradiated by the laser irradiation device and the two side walls are respectively located above and below the transmission surface of the transmission component, the spacing between the top side wall of the material turning trough and the transmission surface of the transmission component is greater than or equal to the thickness of the battery cell, the material turning trough of the unloading station is arranged back to back with the station trough of the loading station and the ends are flush, at the avoidance station, the material turning component is located directly above the transmission surface of the transmission component and there is a gap between the two for the battery cell to pass through.

[0008] Preferably, in order to facilitate flexible adjustment of the position of the material turning chute so that it can be quickly adjusted to a loading station, an unloading station or an avoidance station, the switching unit includes a telescopic unit and a rotation unit, the telescopic unit is arranged on the frame and the output end moves in a vertical direction, the output end of the telescopic unit is connected to the rotation unit, and the rotation unit drives the material turning chute to rotate and the rotation axis is parallel to the second direction.

[0009] Preferably, in order to control the position of the battery cell on the transmission surface of the transmission component and improve the grooving accuracy, a material guiding component is also included. The material guiding component is arranged on the side of the material turning component close to the laser irradiation device, and is used to guide the position of the battery cell on the transmission surface of the transmission component along the second direction.

[0010] Preferably, in order to realize the material guiding function for the battery cells, the material guiding component includes two material guiding members arranged opposite each other along the second direction and adjacent to the transmission surface of the transmission component, the two material guiding members are arranged horizontally, and the two transmission belts are located between the two material guiding members.

[0011] Preferably, in order to guide the position of the battery cells on the transmission surface of the transmission assembly, each material guide member includes a material guide strip, and the material guide strip includes a straight bar extending along a first direction and a transition bar arranged at the end of the straight bar. The transition bars facing each other of the two material guide members are narrowed in the feeding direction and expanded in the discharging direction.

[0012] Preferably, in order to facilitate the movement of the battery cells on the transmission assembly and reduce the friction during the movement of the battery cells, each material guide member also includes a guide wheel distributed along the extension direction of the material guide strip and rotating around its own axis, the axis of the guide wheel extends in the vertical direction, and the wheel surface of the guide wheel protrudes from the plane where the side of the material guide member close to the transmission assembly is located.

[0013] Preferably, in order to adjust the groove position of the battery cell by the laser irradiation device, the material guide assembly also includes a translation unit, which drives the two material guide members to move synchronously along the second direction to adjust the groove position of the laser irradiation device on both sides of the battery cell so that the groove positions on both sides of the battery cell are staggered.

[0014] Preferably, in order to improve the accuracy of laser grooving, a cooling component is also included, wherein the cooling component includes an air blowing pipe extending in parallel with the second direction directly above the transmission surface of the transmission component and adjacent to the laser irradiation device, downward blowing holes are provided on the circumferential side wall of the air blowing pipe, the air blowing pipe is connected to an air pump, and the input end of the air pump is connected to a filter component.

[0015] Preferably, in order to prevent the discharge of harmful gases generated during cutting, and to further achieve cooling and ensure stable transmission of battery cells, the filter assembly includes a filter shell adjacent to the transmission surface of the transmission assembly and located directly below the blow pipe, a filter element is arranged in the filter shell, and the top surface of the filter shell is densely covered with negative pressure suction holes.

[0016] Preferably, in order to ensure the cooling effect on the battery cell, thereby further improving the laser grooving accuracy of the battery cell, a cooling pipe is fixedly connected between the output end of the air pump and the air blowing pipe, and the cooling pipe is connected to a liquid cooling assembly, the liquid cooling assembly includes a liquid cooling box, a liquid cooling shell fixedly mounted outside the cooling pipe, a liquid cooling pump and a return pipe both fixedly connected to the liquid cooling shell, the liquid cooling shell and the cooling pipe enclose a liquid cooling cavity, the input end of the liquid cooling pump is connected to the liquid cooling box, and the end of the return pipe away from the liquid cooling shell is arranged in the liquid cooling box.

[0017] In summary, compared with the prior art, the multifunctional laser grooving device for passivation treatment of the present invention can place batches of battery cells on the transmission component one by one and collect the grooved battery cells one by one through the loading and unloading components, and the contact surface between the battery cell and the transmission component can be adjusted by the turning component. At the same time, the turning trough can also be moved to the avoidance position, and cooperate with the laser device to realize single-sided grooving and double-sided grooving, thereby improving processing efficiency and avoiding damage caused by squeezing the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 Explosion diagram of Figure 3 yes Figure 1 A schematic diagram of the cross-sectional structure of; Figure 4 yes Figure 3 A magnified view of part A; Figure 5 It is a structural schematic diagram of the loading and unloading assembly of the present invention; Figure 6 yes Figure 5 Explosion diagram of Figure 7 It is a structural schematic diagram of the material turning assembly of the present invention; Figure 8 yes Figure 7 Explosion diagram of Fig. 9 It is a schematic diagram of the connection structure between the transmission component and the material guiding component of the present invention; Fig.10 yes Fig. 9 A top view of Fig.11 yes Fig. 9 Schematic diagram of the explosion from another perspective; Fig.12 It is a schematic diagram of the connection structure of the temperature reduction component and the liquid cooling component of the present invention; Fig.13 yes Fig.12 Explosion diagram of Fig.14 yes Fig.12 Schematic diagram of the explosion from another perspective; In the figure: 1, frame; 11, channel; 12, transmission bracket; 13, crossbeam; 14, first distance sensor; 2, transmission component; 21, drive unit; 211, drive motor; 212, transmission wheel; 213, concentric shaft; 22, transmission belt; 24, side plate; 25, slide pipe; 26, bearing; 3, battery cell; 4, loading and unloading component; 41, lifting unit; 411, lifting motor; 412, screw; 413, screw sleeve; 414, guide rod; 415, guide pipe ; 416, connecting groove; 417, docking hole; 418, bolt; 419, nut; 42, flower basket; 421, vertical bar; 422, support bar; 423, top plate; 424, connecting seat; 425, back bar; 426, jack; 43, protective shell; 5, laser irradiation device; 6, turning assembly; 61, turning groove; 611, turning barrel; 612, radial limit frame; 613, axial limit frame; 62, telescopic unit; 621, electric push rod; 622, guide rod; 6 23. Guide sleeve; 624. Movable frame; 63. Rotating unit; 631. Rotating motor; 632. Rotating shaft; 633. Rotating sleeve; 64. Second distance sensor; 7. Material guide assembly; 71. Material guide piece; 711. Material guide bar; 7111. Straight bar; 7112. Transition bar; 72. Guide wheel; 73. Translation unit; 731. Translation motor; 732. Screw rod; 733. Bushing; 734. Third distance sensor; 74. Vertical rod; 75. Horizontal bar; 76. Sliding rod; 8. Cooling assembly; 81. Air blowing pipe; 811. Air blowing hole; 82. Air pump; 821. Cooling pipe; 822. Heat exchanger; 83. Filter assembly; 831. Filter shell; 8311. Negative pressure suction hole; 8312. Shell; 8213. Shell cover; 8314. Inner convex edge; 8315. Positioning pressure frame; 832. Filter element; 8321. Filter barrel; 8322. Outer fold; 9. Liquid cooling assembly; 91. Liquid cooling box; 92. Liquid cooling shell; 93. Liquid cooling pump; 94. Reflux pipe. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0020] like Figure 1-Figure 14 As shown, the present invention provides a multifunctional laser grooving device for passivation treatment, comprising: Rack 1; The transmission component 2 includes a driving unit 21 and two transmission belts 22 arranged side by side in a horizontal direction. The transmission direction and the distribution direction of the two transmission belts 22 are respectively a first direction and a second direction. The second direction and the second direction are both horizontal and perpendicular to each other. The distance between the two sides of the two transmission belts 22 that are away from each other is less than the width of the battery cell 3. The driving unit 21 drives the two transmission belts 22 to rotate at the same speed along their own circumferential direction. The upper and lower material components 4 are provided with two and are respectively arranged at the two ends of the transmission component 2. The upper and lower material components 4 include a lifting unit 41 arranged on the frame 1 and a flower basket 42 detachably connected to the output end of the lifting unit 41. The flower basket 42 includes a bearing unit arranged on both sides of the transmission component 2. The bearing unit includes a vertical bar 421 extending in the vertical direction and support bars 422 arranged on the vertical bar 421 and distributed at intervals along the length direction of the vertical bar 421; A laser irradiation device 5, the laser irradiation device 5 is located directly above the transmission component 2, and the laser irradiation device 5 irradiates a laser beam distributed between the two transmission belts 22 along the second direction downward; The material turning component 6 is arranged between the laser irradiation device 5 and one end of the transmission component 2. The material turning component 6 includes a material turning groove 61 and a switching unit. The material turning groove 61 extends along the second direction. The switching unit is used to switch the material turning groove 61 to a loading station, an unloading station or an avoidance station. At the loading station, the material turning groove 61 faces the laser beam irradiated by the laser irradiation device 5 and the two side walls are respectively located above and below the transmission surface of the transmission component 2. The distance between the top side wall of the material turning groove 61 and the transmission surface of the transmission component 2 is greater than or equal to the thickness of the battery cell 3. The material turning groove 61 of the unloading station is arranged back to back with the station groove of the loading station and the ends are flush. At the avoidance station, the material turning component 6 is located directly above the transmission surface of the transmission component 2 and there is a gap between the two for the battery cell 3 to pass through.

[0021] In the device, the loading and unloading assembly 4 mainly includes a lifting unit 41 and a flower basket 42. The output end of the lifting unit 41 is detachably connected to the flower basket 42, which is convenient for removing the flower basket 42, loading the battery cells 3 on the support bar 422 of the flower basket 42, or removing the battery cells 3 from the support bar 422. When the flower basket 42 is connected to the lifting unit 41, the lifting and lowering movement of the flower basket 42 can be controlled by the lifting unit 41, so that the battery cells 3 can be placed on the two conveyor belts 22 at one end of the transmission assembly 2, that is, the unloading operation is performed, or at the other end of the transmission assembly 2, the battery cells 3 mounted on the two conveyor belts 22 are removed from the transmission assembly 2, that is, the loading operation is performed.

[0022] According to the use requirements, the device can perform single-sided laser grooving or double-sided laser grooving on the battery cell 3 to meet different use requirements.

[0023] Specifically, when it is necessary to laser groove one side of the battery cell 3, the switching unit controls the turning groove 61 to move to the avoidance position and remain in the avoidance position, so that the entire turning assembly 6 is located directly above the transmission surface of the transmission assembly 2 and the width of the gap between the turning assembly 6 and the transmission surface of the transmission assembly 2 is greater than the thickness of the battery cell 3, which facilitates the passage of the battery cell 3.

[0024] After the turning chute 61 moves to the avoidance position, in the loading and unloading assembly 4 on the side of the laser irradiation device 5 away from the turning assembly 6 (for the convenience of distinction, the loading and unloading assembly 4 here is marked as the feeding side loading and unloading assembly 4, and the other loading and unloading assembly 4 is marked as the discharging side loading and unloading assembly 4), after loading the battery cells 3 into the flower basket 42, the flower basket 42 is connected to the output end of the lifting unit 41. In the two loading and unloading assemblies 4, the projections of the two support bars 422 of the flower basket 42 on the horizontal plane are located outside the projections of the two conveyor belts 22 on the horizontal plane, so that the support bars 422 will not contact the conveyor belts 22 during the lifting and lowering movement of the flower basket 42.

[0025] In the loading and unloading assembly 4 on the feeding side, the height position of the flower basket 42 is gradually adjusted by the lifting unit 41, so that the bottom surface of the battery cell 3 supported by the support bar 422 in the flower basket 42 contacts the upper layer of the conveyor belt 22, and the driving unit 21 in the conveying assembly 2 drives the two conveyor belts 22 to maintain a continuous running state, so that after the bottom surface of the battery cell 3 contacts the upper layer of the conveyor belt 22, the conveyor belt 22 rotating along its own circumferential direction can drive the battery cell 3 to move along the first direction.

[0026] When the cell 3 moves to below the laser irradiation device 5, the laser irradiation device 5 continuously irradiates the cell 3 with multiple laser beams distributed along the second direction, and the cell 3 is driven to move by the rotation of the conveyor belt 22, so as to realize laser grooving on the top surface of the cell 3. In the present invention, in order to form multiple laser beams distributed side by side, the laser irradiation device 5 preferably adopts a multi-beam light emitting device disclosed in the Chinese utility model patent with announcement number CN220863001U.

[0027] After the cell 3 passes directly under the laser irradiation device 5, the laser irradiation device 5 stops running, and the transmission component 2 continues to drive the cell 3 to move horizontally, and enters above one of the support bars 422 of the basket 42 of the upper and lower material assembly 4 on the discharge side. The lifting unit 41 controls the basket 42 to move upward, and the upward movement range is the distribution spacing of two adjacent support bars 422, while the lifting unit 41 in the upper and lower material assembly 4 on the feed side controls the basket 42 to descend, and the descending range is the distribution spacing of two adjacent support bars 422. In this way, the cell 3 is released one by one on the two conveyor belts 22 of the transmission component 2, and the cell 3 is set up and translated by the two conveyor belts 22. After the laser is irradiated by the laser irradiation device 5 for laser grooving, it enters above the support bar 422 of the basket 42 in the upper and lower material assembly 4 on the discharge side. In this way, single-sided laser grooving of batches of cell 3 is achieved.

[0028] When double-sided laser grooving is required for a batch of battery cells 3, the switching unit controls the turning chute 61 to switch back and forth between the loading station and the unloading station. In the initial state, the turning chute 61 is at the loading station. At this time, the two opposite inner walls of the turning chute 61 are horizontally arranged and are respectively located above and below the transmission surface of the transmission component 2. The inner wall located above has a gap with the horizontal plane where the transmission surface of the transmission component 2 is located that is greater than the thickness of the battery cell 3.

[0029] In the loading and unloading assembly 4 on the feeding side, the lifting unit 41 periodically lowers the height position of the flower basket 42, and the amplitude of each lowering of the flower basket 42 is the distribution spacing of adjacent support bars 422, so that the battery cells 3 carried by each support bar 422 of the flower basket 42 fall one by one from low to high on the conveyor belt 22, and the conveyor belt 22 rotated by the driving unit 21 drives each battery cell 3 to translate along the first direction.

[0030] The battery cell 3 passes under the laser irradiation device 5, and the laser irradiation device 5 irradiates one side of the battery cell 3 with a laser. The battery cell 3 is moved with the conveyor belt 22, and after a single-side groove is made, it enters the bottom of the top inner wall of the turning trough 61. The switching unit controls the turning trough 61 to move to the unloading station. At this time, the notch of the turning trough 61 is directly opposite to the unloading and loading assembly 4 on the discharge side, and the two inner walls of the turning trough 61 are horizontally arranged above and below the transmission surface of the transmission assembly 2. The distance between the top side wall and the transmission surface of the transmission assembly 2 is greater than the thickness of the battery cell 3. The battery cell 3 has been loaded before. The processed side faces downward and contacts with the conveyor belt 22, and is transferred to one of the support bars 422 of the basket 42 of the loading and unloading assembly 4 on the discharge side through the conveyor belt 22, and then the basket 42 rises, and at the same time the switching unit switches the turning chute 61 to the loading station, so that the turning chute 61 can receive other battery cells 3 processed by the laser irradiation device 5, and by switching to the unloading station, the battery cells 3 after the grooves are completed are turned over, so that each battery cell 3 can enter each support bar 422 of the basket 42 of the loading and unloading assembly 4 on the discharge side from bottom to top, and the side of the battery cell 3 grooved by the laser faces downward.

[0031] When all the battery cells 3 in the loading and unloading assembly 4 on the feeding side have completed one cutting and their directions and positions have been adjusted by the turning assembly 6 so that the cut side faces downward and is translated into each support bar 422 of the loading and unloading assembly 4 on the discharging side through the conveyor belt 22, the switching unit adjusts the turning trough 61 to the avoidance position to form a gap for the battery cells 3 to pass through.

[0032] Then, the driving unit 21 drives the two conveyor belts 22 to maintain continuous and stable rotation in the opposite direction. The lifting unit 41 in the loading and unloading assembly 4 on the discharge side controls the flower basket 42 to descend periodically. The amplitude of each descent is the distribution spacing of two adjacent support bars 422, so that the slotted side of each battery cell 3 contacts the upper layer of the conveyor belt 22. Through the reverse rotating conveyor belt 22, each battery cell 3 is driven to move in the opposite direction. When passing through the laser irradiation device 5, the laser irradiation device 5 radiates a laser beam downward, thereby processing the ungrooved side of the battery cell 3 to form secondary laser grooving.

[0033] After the secondary laser grooving, the battery cell 3 enters the support bar 422 of the basket 42 of the loading and unloading assembly 4 on the feeding side. The lifting unit 41 drives the basket 42 to rise periodically, and the rising amplitude each time is the distribution spacing of two adjacent support bars 422, so that each battery cell 3, after completing the secondary laser grooving, enters each support bar 422 of the basket 42 of the loading and unloading assembly 4 on the feeding side one by one from bottom to top in order. After each battery cell 3 enters the basket 42, the basket 42 in the loading and unloading assembly 4 on the feeding side is disassembled and separated from the output end of the lifting unit 41.

[0034] Therefore, the laser grooving device of the present invention can meet a variety of different usage needs. It can perform single-sided laser grooving on the battery cell 3, and can also perform double-sided laser grooving. During the grooving process, the position of the laser irradiation device 5 is fixed, and the driving unit 21 drives the conveyor belt 22 to move, so as to form grooves on the surface of the battery cell 3, thereby avoiding structural damage to the battery cell 3 caused by extrusion, and ensuring the quality of laser grooving. The lifting and lowering movement of the flower basket 42 is controlled by the lifting unit 41, and the switching unit in the turning component 6 is used to flexibly control the turning trough 61 to switch between the loading station, the unloading station and the avoidance station, thereby realizing the automatic loading, unloading and flipping functions of the battery cell 3, avoiding damage to the battery cell 3, ensuring processing efficiency, and facilitating high-quality and fast laser grooving of batches of battery cells 3 with different requirements.

[0035] In the present invention, the specific structure of the frame 1 is as follows Figure 1-Figure 3 As shown, the frame 1 includes a channel 11, and the cross-section of the channel 11 is an inverted U-shape. The tops of both ends of the channel 11 are respectively connected to the two loading and unloading components 4. A transmission bracket 12 is arranged in the channel 11, and the transmission component 2 is arranged above the transmission bracket 12. Two horizontal beams 13 extending along the second direction are arranged in the channel 11, and the two ends of the beam 13 are respectively fixedly connected to the two inner side walls of the channel 11, one of the beams 13 has a bottom surface connected to the switching unit, and the other beam 13 is fixedly connected to the laser irradiation device 5, and a first distance sensor 14 facing downward and adjacent to the laser irradiation device 5 is arranged on the beam 13, and the projection of the first distance sensor 14 on the horizontal plane is located between the projections of the two conveyor belts 22 on the horizontal plane, so as to detect whether there is a battery cell 3 passing under the first distance sensor 14. When a battery cell 3 passes, the laser irradiation device 5 irradiates multiple laser beams downward to facilitate laser grooving of the top surface of the battery cell 3 passing under the first distance sensor 14.

[0036] The specific structure of the transmission component 2 is as follows: Figure 9-11As shown, the transmission component 2 also includes two side plates 24 distributed along the second direction, the length direction of the two side plates 24 is the first direction, the side plates 24 are vertically arranged and the bottom is fixed above the two sides of the transmission bracket 12, the transmission belt 22 is located on the inner side of the side plates 24, the driving unit 21 includes a driving motor 211, the casing of the driving motor 211 is fixed on one of the side plates 24, the driving unit 21 also includes transmission wheels 212 located at both ends of the inner side of the transmission belt 22, the transmission wheels 212 are connected through the transmission belt 22, the output end of the driving motor 211 is fixedly connected to one pair of the transmission wheels 212 coaxially, and the other pair of the transmission wheels 212 is fixedly connected coaxially through the concentric shaft 213, the transmission wheel 212 is connected to the bearing 26, the inner ring of the bearing 26 is fixedly connected to the transmission wheel 212 coaxially, and the outer ring is fixed on the side plate 24. The spacing between the two conveyor belts 22 is greater than half the width of the battery cell 3, and the spacing between the two conveyor belts 22 on the sides away from each other is smaller than the width of the battery cell 3. In this way, the two conveyor belts 22 can horizontally support the battery cell 3 and move the battery cell 3 by rotating the conveyor belts 22 along their own circumferential direction.

[0037] After the transmission component 2 adopts the above structure, the driving motor 211 is started, driving one pair of transmission wheels 212 to rotate around its own axis, while the other pair of transmission wheels 212 cooperates to make the two transmission belts 22 rotate along their own circumference, thereby realizing the translation transmission of the battery cell 3.

[0038] The specific structure of the loading and unloading assembly 4 is as follows Figure 5 and Figure 6 As shown, the flower basket 42 includes a horizontal top plate 423, and two bearing units are arranged at intervals along the length direction of the side edges at the bottom of the two opposite sides of the top plate 423, and each bearing unit includes a vertical bar 421 fixed below the top plate 423, and support bars 422 are fixed on the inner side of the vertical bar 421 and are evenly spaced and horizontally arranged. The interval between two adjacent support bars 422 is greater than the thickness of the battery cell 3, which is convenient for storing and accessing the battery cell 3; among the remaining two side edges of the top plate 423, a back bar 425 extending along the vertical direction is fixed below one of the side edges, and the back bar 425 faces the transmission component 2. When the transmission component 2 transmits the battery cell 3 to the flower basket 42, the back bar 425 can limit the range of movement of the battery cell 3 to prevent the battery cell 3 from escaping from the support range of the support bar 422.

[0039] The lifting unit 41 includes a lifting motor 411, which is fixedly connected to a protective shell 43 with an open top. The top of the protective shell 43 is fixed below the channel 11. The lifting motor 411 is fixed in the protective shell 43 with the output end facing downward. A screw 412 is coaxially fixedly connected thereto and seals the bottom of the protective shell 43. The screw 412 is threadedly connected to a screw sleeve 413. The bottom of the screw sleeve 413 is fixedly connected to a connecting groove 416 with a notch facing downward. Guide rods 414 and guide tubes 415 extending in a vertical direction and slidingly matching with each other are provided on both sides of the connecting groove 416. The bottom end of the guide rod 414 is fixedly connected to the connecting groove 416, and the top end of the guide tube 415 is fixedly connected to the bottom surface of the protective shell 43. The flower basket 42 is detachably connected to the connecting groove 416.

[0040] After adopting the above structure, after the lifting motor 411 is started, it drives the screw 412 to rotate around its own axis, acting on the screw sleeve 413. Under the action of the slidingly matched guide rod 414 and guide tube 415, the screw sleeve 413 drives the connecting groove 416 to move stably in the vertical direction, thereby driving the flower basket 42 below to move up and down.

[0041] In order to realize the quick and detachable connection between the flower basket 42 and the lifting unit 41, a connection seat 424 is fixed above the top plate 423, and two insertion holes 426 distributed along the second direction are arranged on the connection seat 424. The thickness of the connection seat 424 is consistent with the groove width of the connection groove 416. The side wall of the connection groove 416 is provided with docking holes 417 corresponding to the two insertion holes 426. Bolts 418 are inserted into the insertion holes 426 and the docking holes 417, and the bolts 418 are threadedly connected with nuts 419. Through the threaded bolts 418 and nuts 419, the detachable connection between the connection groove 416 and the connection seat 424 is conveniently realized, and then the detachable connection between the flower basket 42 and the lifting unit 41 is realized.

[0042] A further improvement is that the switching unit includes a telescopic unit 62 and a rotating unit 63, the telescopic unit 62 is arranged on the frame 1 and the output end moves along the vertical direction, the output end of the telescopic unit 62 is connected to the rotating unit 63, and the rotating unit 63 drives the turning chute 61 to rotate and the rotation axis is parallel to the second direction.

[0043] After adopting the above structure, the rotating unit 63 and the tipping trough 61 are controlled to move in the vertical direction by the telescopic unit 62 to adjust the height position of the tipping trough 61. When the telescopic unit 62 is retracted upward, the height of the tipping trough 61 increases, and the rotating unit 63 is cooperated to adjust the tipping trough 61 to a horizontal position, so that the tipping trough 61 is located at the avoidance position, which is convenient for the battery cells 3 on the conveyor belt 22 to pass through; the rotating unit 63 can also be controlled to descend by the telescopic unit 62, and the tipping trough 61 is adjusted to a horizontal position by the rotating unit 63. At this time, the tipping trough 61 is in the avoidance position. At the loading station or the unloading station, specifically, when the notch of the turning trough 61 faces the irradiation range of the laser irradiation device 5, the turning trough 61 is located at the loading station. After the turning trough 61 receives the battery cell 3 from the conveyor belt 22, it rotates 180° to switch the turning trough 61 to the unloading station, so that the grooved side of the battery cell 3 is facing downward and in contact with the upper layer of the conveyor belt 22, and moves through the rotation of the conveyor belt 22, after leaving the turning trough 61, the turning trough 61 rotates in the opposite direction along the original path, and the turning trough 61 is adjusted to the loading station.

[0044] The specific structure of the material turning component 6 is as follows Figure 7 and Figure 8 As shown, the turning trough 61 includes a turning barrel 611 whose axial direction is the second direction, and two radial limit frames 612 that are opposite and adjacent to each other are arranged on the circumferential side wall of the turning barrel 611, and the spacing width of the radial limit frames 612 is greater than twice the thickness of the battery cell 3. The two inner side walls of the turning trough 61 are formed by the radial limit frames 612, and the circumferential outer edge of the turning barrel 611 forms the inner bottom wall of the turning trough 61.

[0045] The telescopic unit 62 includes an electric push rod 621, a guide rod 622, a guide sleeve 623 and a movable frame 624. The movable frame 624 is vertically arranged and is a U-shaped structure with an opening downward. The electric push rod 621 and the guide rod 622 are both fixed below the crossbeam 13. The telescopic end of the electric push rod 621 is fixedly connected to the movable frame 624. A guide sleeve 623 extending in a vertical direction is fixed on the side of the movable frame 624 away from the electric push rod 621. The guide rod 622 and the guide sleeve 623 are slidably matched; the rotating unit 63 includes a rotating motor 631, a rotating shaft 632 and a rotating sleeve 633. The rotating motor 631 and the rotating sleeve 633 are respectively fixed below the two ends of the movable frame 624. The rotating motor 631 is fixedly connected to one end of the rotating shaft 632 coaxially, and the other end of the rotating shaft 632 rotates around its own axis in the rotating sleeve 633. The rotating shaft 632 is fixedly passed through the turning barrel 611 coaxially.

[0046] After the switching unit adopts the above structure, the electric push rod 621 of the telescopic unit 62 is started, and the movable frame 624 is stably moved in the vertical direction through the sliding matching guide rod 622 and guide sleeve 623 to adjust the height position of the material turning trough 61. The rotating shaft 632 is driven by the rotating motor 631 to stably rotate under the support of the rotating sleeve 633 to adjust the height position of the material turning trough 61. When the material turning trough 61 is horizontal and the movable frame 624 is retracted upward to the highest position by the electric push rod 621, the material turning trough 61 is in the avoidance position; when the material turning trough 61 is horizontal and the movable frame 624 is pushed downward to the lowest position by the electric push rod 621, the material turning trough 61 is in the loading position or the unloading position.

[0047] In order to limit the battery cell 3 entering the turning chute 61 in the second direction, axial limit frames 613 are fixed to the rotating shaft 632 and are arranged at both ends of the turning chute 61. The spacing of the axial limit frames 613 is slightly larger than the width of the battery cell 3, which is convenient for limiting the battery cell 3. In addition, a downward second distance sensor 64 is also provided on the movable frame 624. The projection of the second distance sensor 64 on the horizontal plane is separated from the projection of the turning chute 61 under the loading station on the horizontal plane. It is convenient to detect whether there is a battery cell 3 entering the turning chute 61 when it is in the loading station, so as to adjust the position of the turning chute 61 after the battery cell 3 enters.

[0048] A further improvement is that it also includes a material guiding component 7, which is arranged on the side of the material turning component 6 close to the laser irradiation device 5, and is used to guide the position of the battery cell 3 on the transmission surface of the transmission component 2 along the second direction; the material guiding component 7 includes two material guiding members 71 arranged directly opposite to each other along the second direction and adjacent to the transmission surface of the transmission component 2, the two material guiding members 71 are both arranged horizontally, and the two conveyor belts 22 are located between the two material guiding members 71.

[0049] The two material guide members 71 in the material guide assembly 7 are used to limit the battery cell 3 on the transmission surface of the transmission assembly 2, so that the two sides of the battery cell 3 can fit with the two material guide members 71, guide the transmission position of the battery cell 3, and accurately control the grooving position of the battery cell 3 by the laser irradiation device 5 to ensure the quality of laser grooving.

[0050] A further improvement is that each material guide member 71 includes a material guide strip 711, and the material guide strip 711 includes a straight strip 7111 extending along the first direction and a transition strip 7112 arranged at the end of the straight strip 7111, and the transition strips 7112 facing the two material guide members 71 are in a contracted shape along the feeding direction and in an expanded shape along the discharging direction; each material guide member 71 also includes a guide wheel 72 distributed along the extension direction of the material guide strip 711 and rotating around its own axis, the axis of the guide wheel 72 extends in the vertical direction, and the wheel surface of the guide wheel 72 protrudes from the plane where the material guide member 71 is close to the transmission component 2; the material guide component 7 also includes a translation unit 73, and the translation unit 73 drives the two material guide members 71 to move synchronously along the second direction, so as to adjust the groove positions of the two sides of the battery cell 3 by the laser irradiation device 5, so that the groove positions on the two sides of the battery cell 3 are staggered.

[0051] Specifically, Figure 9-11 As shown, the material guide bar 711 is horizontally arranged, and the material guide bar 711 includes a straight bar 7111 and two transition bars 7112. The two transition bars 7112 are integrally connected to the two ends of the straight bar 7111. The transition bar 7112 is arc-shaped, and the center of the circle is located on the side of the transition bar 7112 away from the transmission component 2. Guide wheels 72 rotating around their own axis lines are evenly distributed above the material guide bar 711 along its length direction, and the axis line of the guide wheel 72 extends in the vertical direction.

[0052] After adopting the above structure, the guide wheels 72 on the two arc-shaped transition bars 7112 arranged opposite to each other can conveniently guide the battery cell 3 on the transmission surface of the transmission component 2 to move between the guide wheels 72 on the two straight bars 7111. The guide wheels 72 rotate around their own axis to reduce the friction force on the battery cell 3 when it moves. The positions of the two material guides 71 can be adjusted by the translation unit 73, thereby adjusting the position of the battery cell 3 on the transmission surface of the transmission component 2 along the second direction, and then adjusting the laser grooving position of the laser irradiation device 5 on the battery cell 3. In this way, it is convenient for the laser irradiation device 5 to radiate laser beams at different positions on both sides of the battery cell 3, open laser grooves at different positions, and avoid overlapping of the groove positions, which will increase the damage to the structure of the battery cell 3.

[0053] To be more specific, vertical rods 74 extending vertically downward are fixed below the two ends of the straight bar 7111, and the bottom ends of the two vertical rods 74 are fixedly connected by a horizontal bar 75. The horizontal bars 75 of the two material guide members 71 are fixedly connected by two sliding rods 76 distributed along the first direction. The sliding rod 76 is U-shaped and opens upward. Two sliding tubes 25 extending along the second direction and distributed in the first direction are fixedly passed through the two side plates 24 of the transmission component 2, and the middle part of the sliding rod 76 slides with the sliding tube 25. The translation unit 73 includes a translation motor 731, a screw rod 732, a shaft sleeve 733 and a third distance sensor 734. The translation motor 731 is fixed between the two side plates 24 and the output end is coaxially fixedly connected with a screw rod 732 passing through one of the side plates 24 and extending along the second direction. The screw rod 732 is threadedly connected to the shaft sleeve 733 and fixed below one of the horizontal bars 75. The third distance sensor 734 is fixed on the shaft sleeve 733 and faces the side plate 24.

[0054] After adopting the above structure, the translation motor 731 is started, driving the screw rod 732 to rotate, acting on the shaft sleeve 733, thereby driving the horizontal bar 75 to move. Under the sliding cooperation of the slide bar 76 and the slide tube 25, the two guide strips 711 move synchronously in a direction parallel to the second direction, and the position of each guide wheel 72 is adjusted to change the position of the battery cell 3 on the transmission component 2, thereby adjusting the slot position of the laser irradiation device 5 for the battery cell 3. The distance between the shaft sleeve 733 and the side plate 24 can be detected by the third distance sensor 734, thereby detecting the position of the guide member 71, so as to facilitate the precise control of the position of the guide member 71 relative to the transmission component 2, so as to accurately control the position of the battery cell 3 on the transmission surface of the transmission component 2.

[0055] A further improvement is that it also includes a cooling component 8, which includes an air blowing pipe 81 extending in parallel to the second direction directly above the transmission surface of the transmission component 2 and adjacent to the laser irradiation device 5, and a downward blowing hole 811 is provided on the circumferential side wall of the air blowing pipe 81. The air blowing pipe 81 is connected to an air pump 82, and the input end of the air pump 82 is connected to a filter component 83.

[0056] By setting the cooling component 8, after the device is started, the air pump 82 is started to introduce air into the channel 11. The introduced air can be filtered by the filter component 83 to prevent harmful gases generated during laser grooving from polluting the surrounding environment. After the air is purified, it is transported to the blowing pipe 81 through the air pump 82, so that the blowing pipe 81 enters the clean air and sprays it out from the blowing hole 811 and sprays downward on the battery cell 3 to cool the battery cell 3, thereby preventing the high temperature generated during grooving from affecting the accuracy of laser grooving. In addition, due to the downward spraying of high-speed airflow, the pressure between the battery cell 3 and the conveyor belt 22 is increased, which can increase the transmission force between the two and ensure the smooth transmission of the battery cell 3.

[0057] A further improvement is that the filter assembly 83 includes a filter shell 831 which is adjacent to the transmission surface of the transmission assembly 2 and located directly below the blowing pipe 81, a filter element 832 is arranged in the filter shell 831, and the top surface of the filter shell 831 is densely covered with negative pressure suction holes 8311; a cooling pipe 821 is fixedly connected between the output end of the air pump 82 and the blowing pipe 81, and the cooling pipe 821 is connected to the liquid cooling assembly 9, the liquid cooling assembly 9 includes a liquid cooling box 91, a liquid cooling shell 92 fixedly mounted on the outside of the cooling pipe 821, a liquid cooling pump 93 and a return pipe 94 which are both fixedly connected to the liquid cooling shell 92, the liquid cooling shell 92 and the cooling pipe 821 enclose a liquid cooling cavity, the input end of the liquid cooling pump 93 is connected to the liquid cooling box 91, and the end of the return pipe 94 away from the liquid cooling shell 92 is arranged in the liquid cooling box 91.

[0058] Specifically, Figure 3 , Figure 4 and Figure 12-14 As shown, the filter shell 831 includes a shell body 8312 with an open top and a shell cover 8213 arranged on the shell body 8312. The bottom surface of the shell cover 8213 is provided with a positioning pressure frame 8315 which is sealed with the circumferential inner wall of the shell body 8312 to ensure the assembly accuracy of the shell cover 8213 and the shell body 8312; the top surface of the shell cover 8213 is densely covered with negative pressure suction holes 8311, so that when the air pump 82 is running, a downward negative pressure is generated, which increases the pressure of the battery cell 3 and the conveyor belt 22, ensures a stable transmission force, and can also cool the bottom surface of the battery cell 3.

[0059] An inner convex edge 8314 is fixed on the circumferential inner wall of the shell 8312, and the filter element 832 includes a filter barrel 8321 with an open top and an outer flange 8322 fixed on the circumferential outer edge of the top of the filter barrel 8321. The circumferential outer edge of the filter barrel 8321 is sealed with the circumferential inner wall of the inner convex edge 8314, and the outer flange 8322 is clamped between the inner convex edge 8314 and the positioning pressure frame 8315 to ensure the assembly accuracy of the filter element 832. The circumferential side walls and bottom walls of the filter barrel 8321 are densely covered with filter holes, which are convenient for filtering harmful gases passing through the negative pressure suction hole 8311.

[0060] The input end of the air pump 82 is fixed below the filter shell 831 and connected to the inner cavity of the filter shell 831; the output end of the air pump 82 is fixedly connected to the cooling pipe 821, and the heat exchange plates 822 are distributed in a circular array on the circumferential inner wall of the cooling pipe 821. The two ends of the blowing pipe 81 extend downward to the two ends of the cooling pipe 821 and are fixedly connected.

[0061] After adopting the above structure, the air pump 82 is started, and the air below the transmission surface of the transmission component 2 is extracted, and then filtered through the filter element 832 to form clean air. After passing through the cooling pipe 821, it enters the blowing pipe 81, and the air flow is sprayed downward through the blowing pipe 81 to cool the battery cell 3, thereby ensuring the accuracy of laser grooving and the stable transmission of the battery cell 3.

[0062] In the liquid cooling assembly 9, the top of the liquid cooling box 91 is open and is used to store coolant, usually water. The liquid cooling shell 92 is fixedly mounted outside the cooling tube 821 and enclosed with the cooling tube 821 to form a liquid cooling cavity. The input and output ends of the liquid cooling pump 93 are respectively connected to the inner cavity of the liquid cooling box 91 and the liquid cooling cavity. One end of the reflux pipe 94 is connected to the liquid cooling cavity, and the other end is arranged in the liquid cooling box 91.

[0063] After adopting the above structure, the liquid cooling pump 93 is started to draw the coolant in the liquid cooling box 91 into the liquid cooling cavity of the liquid cooling shell 92, and then flows out from the return pipe 94, so that the coolant circulates. At the same time, the clean air entering the cooling pipe 821 is cooled by the cooling pipe 821 and the heat exchange plate 822 together with the coolant, so as to reduce the temperature of the clean air, so that the blowing hole 811 of the blowing pipe 81 can spray low-temperature gas, further enhancing the cooling effect on the battery cell 3, and avoiding the battery cell 3 being affected by the laser grooving and causing the temperature of the battery cell 3 to rise suddenly, resulting in a decrease in the grooving accuracy of the battery cell 3 or damage to the battery cell 3. In this way, the quality of the laser grooving of the battery cell 3 is guaranteed.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A multifunctional laser grooving device for passivation treatment, characterized in that: include: Rack(1); A transmission component (2), the transmission component (2) comprising a driving unit (21) and two transmission belts (22) arranged side by side in a horizontal direction, the transmission direction and the distribution direction of the two transmission belts (22) being respectively a first direction and a second direction, the second direction and the second direction being both horizontal and perpendicular to each other, the distance between the two sides of the two transmission belts (22) that are away from each other being less than the width of the battery cell (3), and the driving unit (21) driving the two transmission belts (22) to rotate at the same speed along their own circumferential direction; A loading and unloading assembly (4), wherein two loading and unloading assemblies (4) are provided and are respectively arranged at two ends of the transmission assembly (2), wherein the loading and unloading assembly (4) comprises a lifting unit (41) arranged on the frame (1) and a flower basket (42) detachably connected to an output end of the lifting unit (41), wherein the flower basket (42) comprises a bearing unit arranged on two sides of the transmission assembly (2), wherein the bearing unit comprises a vertical bar (421) extending in a vertical direction and support bars (422) arranged on the vertical bar (421) and distributed at intervals along the length direction of the vertical bar (421); A laser irradiation device (5), the laser irradiation device (5) being located directly above the transmission component (2), the laser irradiation device (5) irradiating downward a laser beam distributed between the two transmission belts (22) along a second direction; A material turning component (6), the material turning component (6) is arranged between the laser irradiation device (5) and one end of the transmission component (2), the material turning component (6) comprises a material turning groove (61) and a switching unit, the material turning groove (61) extends along the second direction, the switching unit is used to switch the material turning groove (61) to a loading station, a unloading station or an avoidance station, at the loading station, the material turning groove (61) faces the laser beam irradiated by the laser irradiation device (5) and the two side walls are respectively located above and below the transmission surface of the transmission component (2), the spacing between the top side wall of the material turning groove (61) and the transmission surface of the transmission component (2) is greater than or equal to the thickness of the battery cell (3), the material turning groove (61) of the unloading station and the station groove of the loading station are arranged back to back and the ends are flush, at the avoidance station, the material turning component (6) is located directly above the transmission surface of the transmission component (2) and there is a gap between the two for the battery cell (3) to pass through.

2. The multifunctional laser slotting device for passivation treatment according to claim 1, characterized in that: The switching unit comprises a telescopic unit (62) and a rotating unit (63); the telescopic unit (62) is arranged on the frame (1) and an output end thereof moves in a vertical direction; the output end of the telescopic unit (62) is connected to the rotating unit (63); the rotating unit (63) drives the turning chute (61) to rotate and the rotation axis is parallel to the second direction.

3. The multifunctional laser slotting device for passivation treatment according to claim 1, characterized in that: It also includes a material guiding component (7), which is arranged on a side of the material turning component (6) close to the laser irradiation device (5) and is used to guide the position of the battery sheet (3) along the second direction on the transmission surface of the transmission component (2).

4. The multifunctional laser slotting device for passivation treatment according to claim 3, characterized in that: The material guide assembly (7) comprises two material guide members (71) arranged opposite to each other along the second direction and immediately above the transmission surface of the transmission assembly (2); the two material guide members (71) are both arranged horizontally, and the two transmission belts (22) are located between the two material guide members (71).

5. The multifunctional laser slotting device for passivation treatment according to claim 4, characterized in that: Each material guide member (71) comprises a material guide strip (711), wherein the material guide strip (711) comprises a straight strip (7111) extending along a first direction and a transition strip (7112) arranged at an end of the straight strip (7111), and the transition strips (7112) facing each other of the two material guide members (71) are in a contracted shape along a material feeding direction and in an expanded shape along a material discharging direction.

6. The multifunctional laser slotting device for passivation treatment according to claim 3, characterized in that: Each material guide member (71) further comprises a guide wheel (72) distributed along the extension direction of the material guide strip (711) and rotating around its own axis, the axis of the guide wheel (72) extending in the vertical direction, and the wheel surface of the guide wheel (72) protruding from the plane where a side of the material guide member (71) close to the transmission component (2) is located.

7. The multifunctional laser slotting device for passivation treatment according to claim 3, characterized in that: The material guide assembly (7) further comprises a translation unit (73), wherein the translation unit (73) drives the two material guide members (71) to move synchronously along the second direction, so as to adjust the slot positions of the two sides of the battery cell (3) by the laser irradiation device (5), so that the slot positions of the two sides of the battery cell (3) are staggered.

8. The multifunctional laser slotting device for passivation treatment according to claim 1, characterized in that: The invention also comprises a cooling component (8), wherein the cooling component (8) comprises an air blowing pipe (81) extending in parallel with the second direction directly above the transmission surface of the transmission component (2) and adjacent to the laser irradiation device (5), wherein downward-facing air blowing holes (811) are arranged on the circumferential side wall of the air blowing pipe (81), the air blowing pipe (81) is connected to an air pump (82), and the input end of the air pump (82) is connected to a filter component (83).

9. The multifunctional laser slotting device for passivation treatment according to claim 8, characterized in that: The filter assembly (83) comprises a filter housing (831) located immediately below the transmission surface of the transmission assembly (2) and directly below the air blowing pipe (81), a filter element (832) being arranged in the filter housing (831), and a top surface of the filter housing (831) being densely covered with negative pressure suction holes (8311).

10. The multifunctional laser slotting device for passivation treatment according to claim 9, characterized in that: A cooling pipe (821) is fixedly connected between the output end of the air pump (82) and the air blowing pipe (81); the cooling pipe (821) is connected to a liquid cooling assembly (9); the liquid cooling assembly (9) comprises a liquid cooling box (91), a liquid cooling shell (92) fixedly sleeved outside the cooling pipe (821), a liquid cooling pump (93) and a return pipe (94) both fixedly connected to the liquid cooling shell (92); the liquid cooling shell (92) and the cooling pipe (821) enclose a liquid cooling cavity; the input end of the liquid cooling pump (93) is connected to the liquid cooling box (91); and the return pipe (94) is arranged in the liquid cooling box (91) at one end away from the liquid cooling shell (92).

Images