A positioning mechanism for a heterojunction battery cell

Abstract

The present invention relates to the field of battery positioning technology, and proposes a positioning mechanism for heterojunction battery cells, including a main frame and a mechanical arm, wherein a middle bracket is arranged in the middle of the main frame, and a power structure is arranged on the outer surface of the middle bracket, and a roller is rotatably connected to the outer surface of the main frame, and a guide plate is arranged around the outer surface of the roller; the power structure includes a servo motor fixedly connected to the outer surface of the middle bracket, and the output end of the servo motor is fixedly connected to a No. 1 gear, and the outer surface of the No. 1 gear is meshingly connected to a No. 2 gear, and the outer surface of the No. 2 gear is penetrated and connected to a rotating shaft, and the outer surface of the rotating shaft is provided with threads, and the outer surface of the middle bracket is fixedly connected to a guide rod, and a positioning structure is arranged between the rotating shaft and the guide rod. Through the above technical scheme, the problem of low efficiency of the whole process in the existing heterojunction battery cell positioning mechanism, that is, during the process of conveying and positioning, the conveyor belt needs to stop running before clamping and positioning, and the robot can only suck and transport it after the positioning is completed, is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery positioning, and in particular to a positioning mechanism for a heterojunction battery cell. Background Art

[0002] The full name of heterojunction cell is intrinsic thin-film heterojunction cell. It is a new type of cell based on the photovoltaic effect. It has excellent passivation effect, high conversion efficiency, high bifaciality, almost no photoinduced degradation, good temperature characteristics, the ability to use thin silicon wafers, and the ability to stack perovskites. With the development of the photovoltaic industry, the output of heterojunction cells has gradually increased. During the production process of heterojunction cells, the cells need to be positioned through matching positioning structures to ensure the accuracy of processes such as gluing.

[0003] Existing heterojunction solar cells are mostly clamped and positioned on a conveyor belt by clamping on both sides, and then grabbed by a robot to proceed to the next step.

[0004] However, during the conveying and positioning process, the positioning mechanism of the above-mentioned existing heterojunction battery cell needs to stop the conveyor belt before clamping and positioning. After positioning is completed, it can be sucked and transported by a robot. The whole process is inefficient. Therefore, we propose a positioning mechanism for heterojunction battery cells. Summary of the invention

[0005] The present invention proposes a positioning mechanism for heterojunction battery cells, which solves the problem that the existing positioning mechanism for heterojunction battery cells in the related art needs to stop the conveyor belt before clamping and positioning during the conveying and positioning process, and can only be sucked and transported by a robot after the positioning is completed, resulting in low efficiency of the entire process.

[0006] The technical solution of the present invention is as follows:

[0007] A positioning mechanism for a heterojunction cell comprises a main frame and a mechanical arm, wherein a middle support is arranged in the middle of the main frame, a power structure is arranged on the outer surface of the middle support, a roller is rotatably connected to the outer surface of the main frame, and a guide plate is arranged around the outer surface of the roller;

[0008] The power structure includes a servo motor fixedly connected to the outer surface of the middle bracket, the output end of the servo motor is fixedly connected to a first gear, the outer surface of the first gear is meshedly connected to a second gear, the outer surface of the second gear is penetrated by a rotating shaft, the outer surface of the rotating shaft is provided with threads, and the outer surface of the middle bracket is fixedly connected to a guide rod;

[0009] A positioning structure is provided between the rotating shaft and the guide rod, and a limiting structure is provided on the outer surface of the power structure;

[0010] The grabbing end of the mechanical arm is fixedly connected with a panel, and the lower end of the panel is respectively connected with a suction cup and an auxiliary component.

[0011] As a further technical solution of the present invention, the number of threads is two groups and they are symmetrically distributed, the rotating shaft coincides with the axis of the second gear, the rotating shaft passes through the middle bracket and the rotating shaft and the middle bracket are rotatably connected, and the guide rod is parallel to the rotating shaft.

[0012] As a further technical solution of the present invention, the positioning structure includes a positioning bracket movably sleeved on the outer surface of the rotating shaft and the guide rod, the outer surface of the positioning bracket is provided with a screw hole, the outer surface of one side of the positioning bracket is rotatably connected to a side wheel, one end of the positioning bracket is fixedly connected to an inclined plate, the upper end of the positioning bracket is fixedly connected to a fixed bracket, the lower ends of the fixed bracket are respectively connected to a shock absorber and a shock absorbing spring, the lower ends of the shock absorber and the shock absorbing spring are commonly connected to a movable bracket, the outer surface of the movable bracket is rotatably connected to a top wheel, the lower end of the positioning bracket is fixedly connected to an extension bracket, and the outer surface of the extension bracket is provided with a guide hole.

[0013] As a further technical solution of the present invention, one end of the rotating shaft with a thread matches the screw hole, the rotating shaft and the positioning bracket are threadedly connected, the diameter of the guide rod is equal to the diameter of the guide hole, and the positioning bracket can be moved back and forth along the length direction of the rotating shaft through the forward and reverse rotation of the rotating shaft. The number of the side wheels is several groups and is distributed in an "I"-shaped array.

[0014] As a further technical solution of the present invention, the upper and lower elastic ends of the shock-absorbing spring and the upper and lower ends of the shock absorber are fixedly connected to the fixed bracket and the movable bracket respectively, and the axis of the shock-absorbing spring coincides with the axis of the shock absorber one by one. The top wheel is horizontally arranged to guide the upper end of the battery cell through the top wheel, the side wheels are vertically arranged to guide the side edges of the battery cell through the side wheels, and the oblique plate is obliquely arranged.

[0015] As a further technical solution of the present invention, the limiting structure includes a rack slidably arranged on the outer surface of the middle bracket, one end of the rack is obliquely fixedly connected to the first oblique frame, the outer surface of the middle bracket is fixedly connected to a stabilizing rod, the upper end of the stabilizing rod is fixedly connected to a fixed plate, the outer surface of the fixed plate is penetrated by a movable rod, and the lower end of the movable rod is fixedly connected to the second oblique frame.

[0016] As a further technical solution of the present invention, the outer surface of the movable rod is fixedly connected to a movable disk, a reset spring is connected between the movable disk and the fixed disk, the upper end of the movable rod is fixedly connected to a limiting plate, a guide groove is provided on the outer surface of the side of the rack, and the outer surface of the middle bracket is fixedly connected to a limiting bracket corresponding to the side of the rack.

[0017] As a further technical solution of the present invention, the rack is meshed with the No. 1 gear, the sliding direction of the rack is parallel to the conveyor belt, the No. 1 diagonal frame and the No. 2 diagonal frame are both obliquely arranged, the angle formed between the No. 1 diagonal frame and the rack is 20 degrees, and the angle formed between the No. 2 diagonal frame and the movable rod is 70 degrees.

[0018] As a further technical solution of the present invention, the movable rod and the fixed plate are slidably connected, the movable rod is a quadrangular prism structure, and the movable rod is moved upward by the No. 1 inclined frame pushing the No. 2 inclined frame. The side section of the limit bracket is a vertical "convex" shaped structure, and the protruding end is embedded in the guide groove, and the rack and the guide groove are slidably connected.

[0019] As a further technical solution of the present invention, the auxiliary component includes a hollow column fixedly connected to the outer surface of the panel, a positioning spring is arranged inside the hollow column, the lower end of the positioning spring is connected to a pushing rod, the upper and lower elastic ends of the positioning spring are respectively fixedly connected to the panel and the pushing rod, and the pushing rod and the hollow column are slidably connected.

[0020] The working principle and beneficial effects of the present invention are:

[0021] 1. In the present invention, through the cooperation of the positioning structure and the power structure, the battery cell can be guided and positioned from both sides and the top of the battery cell without stopping the conveyor belt, so that the battery cell can maintain stability and accuracy during the conveying process and avoid possible deviation of the battery cell.

[0022] 2. The present invention can limit one end of the battery on the basis of guiding and positioning the two sides and top of the battery cell through the coordination of the limiting structure, the power structure and the positioning structure, so that the position of the battery cell can be kept relatively still while the conveyor belt is running continuously, which is beneficial to the subsequent handling operation of the battery cell and effectively improves the operation efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Schematic diagram of the cutaway local structure;

[0025] Figure 3 It is a schematic diagram of the local structure of the power structure in the present invention;

[0026] Figure 4 It is a partial structural schematic diagram of the disassembly and installation of the positioning structure in the present invention;

[0027] Figure 5 It is a schematic diagram of the local structure of the limiting structure of the present invention;

[0028] Figure 6 For the present invention Figure 5 A magnified view of the local structure;

[0029] Figure 7 It is a partial front cross-sectional view of the present invention;

[0030] Figure 8 It is a schematic diagram of the partial structure of the auxiliary component in the present invention.

[0031] In the figure: 1, main frame; 2, mechanical arm; 3, middle bracket; 4, power structure; 41, gear No. 1; 42, gear No. 2; 43, shaft; 44, thread; 45, guide rod; 46, servo motor; 5, positioning structure; 51, positioning bracket; 52, screw hole; 53, side wheel; 54, oblique plate; 55, fixed bracket; 56, shock absorber; 57, shock absorbing spring; 58, movable bracket; 59, top wheel; 510, extension bracket; 51 1. Guide hole; 6. Limiting structure; 61. Rack; 62. No. 1 oblique frame; 63. Stabilizing rod; 64. Fixed plate; 65. Movable rod; 66. No. 2 oblique frame; 67. Movable plate; 68. Reset spring; 69. Limiting plate; 610. Guide groove; 611. Limiting bracket; 7. Panel; 8. Suction cup; 9. Auxiliary component; 91. Hollow column; 92. Positioning spring; 93. Push rod; 10. Roller; 11. Conveyor belt; 12. Guide plate. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example 1: Figure 1 to Figure 3As shown, this embodiment proposes a positioning mechanism for heterojunction solar cells, including a main frame 1 and a mechanical arm 2, a middle bracket 3 is arranged in the middle of the main frame 1, and a power structure 4 is arranged on the outer surface of the middle bracket 3, the outer surface of the main frame 1 is rotatably connected to a roller 10, and a guide plate 12 is arranged around the outer surface of the roller 10; the power structure 4 includes a servo motor 46 fixedly connected to the outer surface of the middle bracket 3, the output end of the servo motor 46 is fixedly connected to a first gear 41, the outer surface of the first gear 41 is meshingly connected to a second gear 42, the outer surface of the second gear 42 is penetrated by a rotating shaft 43, the outer surface of the rotating shaft 43 is provided with a thread 44, and the outer surface of the middle bracket 3 is fixedly connected to a guide rod 45; a positioning structure 5 is arranged between the rotating shaft 43 and the guide rod 45, and a limiting structure 6 is arranged on the outer surface of the power structure 4; the grabbing end of the mechanical arm 2 is fixedly connected to a panel 7, and the lower end of the panel 7 is respectively connected to a suction cup 8 and an auxiliary component 9.

[0034] The number of threads 44 is two groups and they are symmetrically distributed. The axis of the rotating shaft 43 coincides with the axis of the second gear 42 . The rotating shaft 43 passes through the middle bracket 3 and is rotationally connected to the middle bracket 3 . The guide rod 45 is parallel to the rotating shaft 43 .

[0035] During use, power can be provided to the positioning structure 5 and the limiting structure 6.

[0036] Example 2: Figure 4 As shown, on the basis of Example 1, it is further proposed that the positioning structure 5 includes a positioning bracket 51 movably sleeved on the outer surface of the rotating shaft 43 and the guide rod 45, the outer surface of the positioning bracket 51 is provided with a screw hole 52, the outer surface of one side of the positioning bracket 51 is rotatably connected to the side wheel 53, one end of the positioning bracket 51 is fixedly connected to the inclined plate 54, the upper end of the positioning bracket 51 is fixedly connected to the fixed bracket 55, the lower end of the fixed bracket 55 is respectively connected to the shock absorber 56 and the shock absorbing spring 57, the lower ends of the shock absorber 56 and the shock absorbing spring 57 are commonly connected to a movable bracket 58, the outer surface of the movable bracket 58 is rotatably connected to the top wheel 59, the lower end of the positioning bracket 51 is fixedly connected to the extension bracket 510, and the outer surface of the extension bracket 510 is provided with a guide hole 511.

[0037] One end of the rotating shaft 43 with a thread 44 matches the screw hole 52, the rotating shaft 43 is connected to the positioning bracket 51 by the thread 44, the diameter of the guide rod 45 is equal to the aperture of the guide hole 511, and the positioning bracket 51 can be moved back and forth along the length direction of the rotating shaft 43 by the forward and reverse rotation of the rotating shaft 43. The number of side wheels 53 is several groups and they are distributed in an "I"-shaped array; the upper and lower elastic ends of the shock-absorbing spring 57 and the upper and lower ends of the shock absorber 56 are fixedly connected to the fixed bracket 55 and the movable bracket 58 respectively, and the axis of the shock-absorbing spring 57 coincides with the axis of the shock absorber 56 one by one, the top wheel 59 is arranged horizontally, and the upper end of the battery cell is guided by the top wheel 59, the side wheel 53 is arranged vertically, and the side of the battery cell is guided by the side wheel 53, and the oblique plate 54 is arranged obliquely.

[0038] The battery cell is transported at the upper end of the conveyor belt 11. When the battery cell is transported to the guide plate 12, it will continue to be transported under the initial guidance of the guide plate 12. When it is transported between the two sets of positioning structures 5, the servo motor 46 drives the first gear 41 to rotate counterclockwise, so that the second gear 42 rotates accordingly, and the second gear 42 drives the shaft 43 to rotate. Under the rotation of the second gear 42, the shaft 43 is connected with the positioning bracket 51 through the thread 44, and under the guidance of the guide rod 45, the positioning bracket 51 is The bracket 51 will move toward the middle of the rotating shaft 43, so that the side wheels 53 on the two sets of positioning brackets 51 fit with the two sides of the battery cell. Since the battery cell itself is relatively thin, the battery cell is in point contact with the side wheels 53 at this time. Through the transportation of the conveyor belt 11 and the rotation of the side wheels 53, the battery cell can be continuously transported. At the same time, the top wheel 59 will squeeze the battery cell from the upper end of the battery cell. At this time, the battery cell and the top wheel 59 are in line contact, so that the battery cell can be better positioned and guided.

[0039] Example 3: Figure 5 to Figure 7 As shown, on the basis of Example 2, it is further proposed that: the limiting structure 6 includes a rack 61 slidably arranged on the outer surface of the middle bracket 3, one end of the rack 61 is obliquely fixedly connected to the first oblique frame 62, the outer surface of the middle bracket 3 is fixedly connected to a stabilizing rod 63, the upper end of the stabilizing rod 63 is fixedly connected to a fixed plate 64, the outer surface of the fixed plate 64 is penetrated by a movable rod 65, and the lower end of the movable rod 65 is fixedly connected to the second oblique frame 66.

[0040] The outer surface of the movable rod 65 is fixedly connected with a movable disk 67, and a reset spring 68 is connected between the movable disk 67 and the fixed disk 64. The upper end of the movable rod 65 is fixedly connected with a limit plate 69, and a guide groove 610 is provided on the outer surface of the side of the rack 61. The outer surface of the middle bracket 3 is fixedly connected with a limit bracket 611 corresponding to the side of the rack 61; the rack 61 is meshed with the first gear 41, and the sliding direction of the rack 61 is parallel to the conveyor belt 11. The first oblique frame 62 and the second oblique frame 66 are both obliquely arranged. The angle formed between the No. 1 oblique frame 62 and the rack 61 is 20 degrees, and the angle formed between the No. 2 oblique frame 66 and the movable rod 65 is 70 degrees; the movable rod 65 and the fixed plate 64 are slidably connected, and the movable rod 65 is a quadrangular prism structure. The No. 1 oblique frame 62 pushes the No. 2 oblique frame 66 to realize the upward movement of the movable rod 65. The side section of the limiting bracket 611 is a vertical "convex" shaped structure, and the protruding end is embedded in the guide groove 610, and the rack 61 and the guide groove 610 are slidably connected.

[0041] During the process of guiding and positioning the battery cell by the above-mentioned positioning structure 5, the counterclockwise rotation of the No. 1 gear 41 will cause the rack 61 to move toward the side away from the No. 1 gear 41. At this time, the No. 1 oblique frame 62 will push the No. 2 oblique frame 66 upward, and the No. 2 oblique frame 66 will drive the movable rod 65 to move vertically upward, so that the limit plate 69 will support the moving direction of one end of the battery cell. At this time, the battery cell remains relatively still, and the area swept upward by the other end of the battery cell will not interfere with the components of the positioning structure 5.

[0042] Example 4: Figure 8 As shown, on the basis of Example 3, it is further proposed that: the auxiliary component 9 includes a hollow column 91 fixedly connected to the outer surface of the panel 7, a positioning spring 92 is arranged inside the hollow column 91, the lower end of the positioning spring 92 is connected to a pushing rod 93, the upper and lower elastic ends of the positioning spring 92 are respectively fixedly connected to the panel 7 and the pushing rod 93, and the pushing rod 93 and the hollow column 91 are slidably connected.

[0043] When the battery cell remains relatively still, the panel 7 is driven by the mechanical arm 2 to move downward, so that the suction cup 8 absorbs and grabs the battery cell. At this time, the position of the grabbed battery cell is stable, and the pushing rod 93 will gently squeeze the battery cell downward, and the pushing rod 93 will move into the hollow column 91, the positioning spring 92 will contract, and the lower end of the pushing rod 93 will be flush with the lower end of the suction cup 8. At this time, the suction force of the suction cup 8 is greater than the pushing force of the positioning spring 92, and the suction cup 8 will absorb the battery cell and will not fall. The pushing of the pushing rod 93 is conducive to maintaining the stability of the horizontal direction of the battery cell, and the positioning and limiting effect of the limiting structure 6 and the positioning structure 5 are combined to keep the battery cell relatively still. At this time, the positioning of the battery cell is more accurate, and the battery cell transported by the mechanical arm 2 is more accurate. At the same time, there is no need to periodically stop the operation of the conveyor belt 11, which can effectively improve the equipment operation efficiency and is conducive to the subsequent accurate effect of battery cell processing.

[0044] It should be noted that after a group of battery cells are transported by the robot arm 2, the servo motor 46 will immediately switch to clockwise rotation. At this time, the two groups of positioning brackets 51 will move away from each other, and the rack 61 will move toward the side of the No. 1 gear 41. At this time, under the reaction force of the return spring 68, it will shrink, so that the upper end of the limit plate 69 is lower than the uppermost end of the conveyor belt 11. When a subsequent group of battery cells is transported to the positioning bracket 51 area, the servo motor 46 will switch to counterclockwise rotation again, so that the position of the battery cell is kept stationary by the positioning structure 5 and the limit structure 6, and then the battery cell is transported by the robot arm 2. This cycle is repeated to transport, position and transport multiple groups of battery cells. The entire process is fully automatic with a high degree of automation, and continuous transportation can effectively improve the operating efficiency of the equipment.

[0045] In summary, the working principle and use process of the present invention are as follows:

[0046] When in use, the battery cell is transported at the upper end of the conveyor belt 11. When the battery cell is transported to the guide plate 12, it will continue to be transported under the preliminary guidance of the guide plate 12. When it is transported between the two sets of positioning structures 5, the servo motor 46 drives the first gear 41 to rotate counterclockwise, so that the second gear 42 rotates accordingly, and the second gear 42 drives the shaft 43 to rotate. Under the rotation of the second gear 42, the shaft 43 is connected to the positioning bracket 51 through the thread 44, and under the guidance of the guide rod 45, The positioning bracket 51 will move toward the middle of the rotating shaft 43, so that the side wheels 53 on the two sets of positioning brackets 51 fit the two sides of the battery cell. Since the battery cell itself is relatively thin, the battery cell is in point contact with the side wheels 53 at this time. The battery cell can be continuously conveyed by the conveying of the conveyor belt 11 and the rotation of the side wheels 53. At the same time, the top wheel 59 will squeeze the battery cell from the upper end of the battery cell. At this time, the battery cell and the top wheel 59 are in line contact, so that the battery cell can be better positioned and guided;

[0047] In the process of guiding and positioning the battery cell by the above-mentioned positioning structure 5, the counterclockwise rotation of the No. 1 gear 41 will cause the rack 61 to move toward the side away from the No. 1 gear 41. At this time, the No. 1 oblique frame 62 will push the No. 2 oblique frame 66 upward, and the No. 2 oblique frame 66 will drive the movable rod 65 to move vertically upward, so that the limit plate 69 will support the moving direction of one end of the battery cell. At this time, the battery cell remains relatively still, and the area swept upward by the other end of the battery cell will not interfere with the components of the positioning structure 5. At this time, the panel 7 is driven by the mechanical arm 2 to move downward, so that the suction cup 8 absorbs and grabs the battery cell. At this time, the position of the grabbed battery cell is stable, and the pushing rod 93 will gently squeeze the battery cell downward. The battery cell will be fixed to the storage tank 91 and the positioning spring 92 will be pressed against the storage tank 91 to prevent the battery cell from falling off. The pushing of the pushing rod 93 is beneficial to maintaining the horizontal stability of the battery cell, and the positioning and limiting effects of the limiting structure 6 and the positioning structure 5 are combined to keep the battery cell relatively still. At this time, the positioning of the battery cell is more accurate, and the battery cell transported by the robot 2 is more accurate. At the same time, there is no need to periodically stop the operation of the conveyor belt 11, which can effectively improve the equipment operation efficiency and facilitate the subsequent accurate processing of the battery cell.

[0048] It should be noted that after a group of battery cells are transported by the robot arm 2, the servo motor 46 will immediately switch to clockwise rotation. At this time, the two groups of positioning brackets 51 will move away from each other, and the rack 61 will move toward the side of the No. 1 gear 41. At this time, under the reaction force of the return spring 68, it will shrink, so that the upper end of the limit plate 69 is lower than the uppermost end of the conveyor belt 11. When a subsequent group of battery cells is transported to the positioning bracket 51 area, the servo motor 46 will switch to counterclockwise rotation again, so that the position of the battery cell is kept stationary by the positioning structure 5 and the limit structure 6, and then the battery cell is transported by the robot arm 2. This cycle is repeated to transport, position and transport multiple groups of battery cells. The entire process is fully automatic with a high degree of automation, and continuous transportation can effectively improve the equipment operation efficiency.

[0049] It should be noted that A is the heterojunction cell being transported.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning mechanism for a heterojunction cell, characterized in that: The invention comprises a main frame (1) and a mechanical arm (2), wherein a middle support (3) is arranged in the middle of the main frame (1), a power structure (4) is arranged on the outer surface of the middle support (3), a roller (10) is rotatably connected to the outer surface of the main frame (1), and a guide plate (12) is arranged around the outer surface of the roller (10); The power structure (4) comprises a servo motor (46) fixedly connected to the outer surface of the middle bracket (3); the output end of the servo motor (46) is fixedly connected to a first gear (41); the outer surface of the first gear (41) is meshingly connected to a second gear (42); the outer surface of the second gear (42) is penetrated by a rotating shaft (43); the outer surface of the rotating shaft (43) is provided with a thread (44); and the outer surface of the middle bracket (3) is fixedly connected to a guide rod (45); A positioning structure (5) is provided between the rotating shaft (43) and the guide rod (45), and a limiting structure (6) is provided on the outer surface of the power structure (4); The gripping end of the mechanical arm (2) is fixedly connected to a panel (7), and the lower end of the panel (7) is respectively connected to a suction cup (8) and an auxiliary component (9).

2. The positioning mechanism for heterojunction solar cells according to claim 1, characterized in that: The number of the threads (44) is two groups and they are symmetrically distributed. The axis of the rotating shaft (43) coincides with the axis of the second gear (42). The rotating shaft (43) passes through the middle bracket (3) and the rotating shaft (43) and the middle bracket (3) are rotatably connected. The guide rod (45) is parallel to the rotating shaft (43).

3. The positioning mechanism for heterojunction solar cells according to claim 2, characterized in that: The positioning structure (5) comprises a positioning bracket (51) movably sleeved on the outer surface of the rotating shaft (43) and the guide rod (45); a screw hole (52) is provided on the outer surface of the positioning bracket (51); a side wheel (53) is rotatably connected to the outer surface of one side of the positioning bracket (51); an inclined plate (54) is fixedly connected to one end of the positioning bracket (51); a fixed bracket (55) is fixedly connected to the upper end of the positioning bracket (51); a shock absorber (56) and a shock absorbing spring (57) are respectively connected to the lower end of the fixed bracket (55); the lower ends of the shock absorber (56) and the shock absorbing spring (57) are commonly connected to a movable bracket (58); the outer surface of the movable bracket (58) is rotatably connected to a top wheel (59); the lower end of the positioning bracket (51) is fixedly connected to an extension bracket (510); and a guide hole (511) is provided on the outer surface of the extension bracket (510).

4. The positioning mechanism for heterojunction solar cells according to claim 3, characterized in that: One end of the rotating shaft (43) with a thread (44) matches the screw hole (52), the rotating shaft (43) and the positioning bracket (51) are threadedly connected, the diameter of the guide rod (45) is equal to the diameter of the guide hole (511), and the positioning bracket (51) moves back and forth along the length direction of the rotating shaft (43) through the forward and reverse rotation of the rotating shaft (43), and the number of the side wheels (53) is a plurality of groups and is distributed in a "one"-shaped array.

5. The positioning mechanism for heterojunction solar cells according to claim 4, characterized in that: The upper and lower elastic ends of the shock absorbing spring (57) and the upper and lower ends of the shock absorber (56) are respectively fixedly connected to the fixed bracket (55) and the movable bracket (58), and the axis of the shock absorbing spring (57) coincides with the axis of the shock absorber (56). The top wheel (59) is arranged horizontally, and the upper end of the battery sheet is guided by the top wheel (59). The side wheel (53) is arranged vertically, and the side of the battery sheet is guided by the side wheel (53). The oblique plate (54) is arranged obliquely.

6. The positioning mechanism for heterojunction solar cells according to claim 3, characterized in that: The limiting structure (6) comprises a rack (61) slidably arranged on the outer surface of the middle bracket (3), one end of the rack (61) is obliquely fixedly connected to a first oblique frame (62), the outer surface of the middle bracket (3) is fixedly connected to a stabilizing rod (63), the upper end of the stabilizing rod (63) is fixedly connected to a fixed plate (64), the outer surface of the fixed plate (64) is penetrated by a movable rod (65), and the lower end of the movable rod (65) is fixedly connected to a second oblique frame (66).

7. The positioning mechanism for heterojunction solar cells according to claim 6, characterized in that: The outer surface of the movable rod (65) is fixedly connected to a movable disk (67), a return spring (68) is connected between the movable disk (67) and the fixed disk (64), the upper end of the movable rod (65) is fixedly connected to a limiting plate (69), the outer surface of the side edge of the rack (61) is provided with a guide groove (610), and the outer surface of the middle bracket (3) is fixedly connected to a limiting bracket (611) at the side edge corresponding to the rack (61).

8. The positioning mechanism for heterojunction solar cells according to claim 7, characterized in that: The rack (61) is meshedly connected with the first gear (41), the sliding direction of the rack (61) is parallel to the conveyor belt (11), the first oblique frame (62) and the second oblique frame (66) are both obliquely arranged, the angle formed between the first oblique frame (62) and the rack (61) is 20 degrees, and the angle formed between the second oblique frame (66) and the movable rod (65) is 70 degrees.

9. The positioning mechanism for heterojunction solar cells according to claim 8, characterized in that: The movable rod (65) is slidably connected to the fixed plate (64); the movable rod (65) is a quadrangular prism-shaped structure; the movable rod (65) is moved upward by the first oblique frame (62) pushing the second oblique frame (66); the side section of the limit bracket (611) is a vertical "convex"-shaped structure, and the protruding end is embedded in the guide groove (610); the rack (61) and the guide groove (610) are slidably connected.

10. The positioning mechanism for heterojunction solar cells according to claim 2, characterized in that: The auxiliary component (9) comprises a hollow column (91) fixedly connected to the outer surface of the panel (7), a positioning spring (92) is arranged inside the hollow column (91), the lower end of the positioning spring (92) is connected to a push rod (93), the upper and lower elastic ends of the positioning spring (92) are respectively fixedly connected to the panel (7) and the push rod (93), and the push rod (93) and the hollow column (91) are slidably connected.

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