A positioning mechanism for a non-destructive laser scribing machine for a battery cell

Abstract

The present invention discloses a positioning mechanism for a non-destructive laser scribing machine for battery cells, which relates to the technical field of scribing machines, including a workbench, a boss coaxially fixed to the top of the workbench, a connecting cavity provided inside the boss, and a plurality of adsorption holes intersecting the connecting cavity provided on the top surface of the boss; a sliding seat connected to the workbench, the sliding seat freely slides along the radial direction of the workbench on the workbench, and a clamping block is fixed to the upper surface of the sliding seat; a negative pressure adsorption mechanism arranged on the workbench; and a translation drive mechanism arranged on the workbench, the translation drive mechanism is used to drive the movement of multiple sliding seats. The present invention performs negative pressure adsorption on the wafer through the negative pressure adsorption mechanism, and then clamps the edge of the wafer through the translation drive mechanism, so that the wafer can be automatically centered, and then the wafer is positioned on the boss, reducing the time consumed in the process of positioning the wafer processing position by an optical camera or CT, while reducing the wafer positioning deviation and improving the wafer processing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of dicing machines, and in particular to a positioning mechanism for a non-destructive laser dicing machine for battery cells. Background Art

[0002] Slicing machines include grinding wheel scribers and laser scribers. Grinding wheel scribers are precision CNC equipment that integrates water-gas-electric, air-static high-speed spindle, precision mechanical transmission, sensors and automatic control technologies. They are mainly used for slicing and cutting of materials such as silicon integrated circuits, light-emitting diodes, lithium niobate, piezoelectric ceramics, gallium arsenide, sapphire, aluminum oxide, iron oxide, quartz, glass, ceramics, and solar cells. Among them, grinding wheel scribers are also called precision grinding wheel cutting machines in China. Laser scribers use high-energy laser beams to irradiate the surface of the workpiece, causing the irradiated area to melt and vaporize locally, thereby achieving the purpose of slicing. Because the laser is focused by a special optical system to become a very small light spot, the energy density is high, and because the processing is non-contact, there is no mechanical impact on the workpiece itself, and the workpiece is not easy to deform. The thermal impact is extremely small, the slicing accuracy is high, and it is widely used in the cutting and slicing of solar panels and thin metal sheets.

[0003] When operating an existing laser scribing machine, the wafer is first placed flat on the workbench, and then the wafer is positioned using a positioning device to determine the processing position of the laser device, such as the patent publication number: CN 214978588 U, discloses a positioning mechanism for a battery cell laser scribing machine, wherein a cavity is arranged in the lower side wall of a placement groove, connecting plates are arranged on the left and right sides of the cavity, slides are fixed on the front and rear sides of the connecting plates, the slides are slidably arranged in the slide grooves on the upper side wall of the cavity, the vertical sides of the slides are fixed on the front and rear sides of the lower surface of the clamping plate, an electric push rod is embedded in the front side wall of the cavity, the electric push rod is connected to the battery, a push plate is fixed on the piston rod of the electric push rod, a driving tube is fixed on one side wall of the pushing plate, a guide rod is inserted into the driving tube, the rear end of the guide rod is fixed on the inner wall of the rear side of the cavity, connecting rods are rotatably connected on the left and right sides of the outer ring wall of the driving tube through hinge seats, and the other ends of the connecting rods are respectively connected to one side wall of the connecting plate through hinge seats, when discharging materials, the two sides of the battery cell can be positioned, thereby achieving the stability of the positioning accuracy during slicing.

[0004] The patent publication number is: CN 116423083 A, which discloses a visual inspection and positioning device for a non-destructive laser scribing machine, including a frame, a transmission part and a detection and positioning part arranged on the frame, the transmission part includes a servo motor, a synchronous wheel connected to the output shaft of the servo motor, a synchronous belt connected to the synchronous wheel, and a side top seat connected to the synchronous belt drive, and also includes a guide rail mechanism, the synchronous belt drives the side top seat to move through the guide rail mechanism, the side top seat includes a front side top seat and a rear side top seat arranged correspondingly, and also includes an inert synchronous wheel, the inert synchronous wheel and the synchronous wheel jointly support the synchronous belt to ensure the transmission function of the synchronous belt; it can accurately position the battery cell to be processed and can perform real-time detection and positioning adjustment during the processing process.

[0005] The above-mentioned positioning device usually uses an optical camera or CT to position the wafer, but this method still requires the wafer to be placed in a suitable position to reduce position deviation during positioning; and during the clamping process, it is difficult to ensure the stability of the wafer, so it is necessary to provide a dicing machine that can perform preliminary positioning of the wafer to reduce wafer positioning deviation. Summary of the invention

[0006] The object of the present invention is to provide a positioning mechanism for a non-destructive laser scribing machine for a battery cell, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A positioning mechanism for a non-destructive laser scribing machine for a battery cell, comprising a working table of the laser scribing machine, and further comprising:

[0009] A boss coaxially fixed to the top of the workbench, a connecting cavity is provided inside the boss, and a top surface of the boss is provided with a plurality of adsorption holes intersecting the connecting cavity;

[0010] A sliding seat connected to the workbench, the sliding seat freely slides along the radial direction of the workbench on the workbench, and a clamping block is fixedly connected to the upper surface of the sliding seat;

[0011] A negative pressure adsorption mechanism provided on the workbench;

[0012] A translation driving mechanism is arranged on the workbench, and the translation driving mechanism is used to drive the plurality of sliding seats to move.

[0013] Furthermore, the end surface of the workbench is provided with a slot for the sliding seat to engage, the sliding seat slides freely in the slot, a guide column is fixedly connected to the inner wall of the slot, and the sliding seat is provided with a sliding hole for the guide column to pass freely.

[0014] Furthermore, a rubber layer is provided on the surface of the clamping block.

[0015] Furthermore, the negative pressure adsorption mechanism includes a fixed seat fixedly connected to the lower surface of the workbench, the fixed seat is hollow inside and has a piston engaged therein, the piston slides vertically and freely in the fixed seat, the workbench is provided with a connecting port connected to the inner cavity of the fixed seat and the connecting cavity, a cylinder is vertically installed at the bottom of the fixed seat, the cylinder rod of the cylinder penetrates into the fixed seat and is connected to a connecting column, and the upper end of the connecting column is fixed to the lower end surface of the piston.

[0016] Furthermore, the translation drive mechanism includes a floating ring sleeved on the connecting column, the floating ring slides freely on the connecting column, the connecting column is provided with an elastic push-up unit for driving the floating ring away from the piston, a connecting arm is fixedly connected to the periphery of the floating ring, the end of the connecting arm passing through the fixed seat is fixedly connected to the connecting ring, the fixed seat is provided with a clearance groove for the connecting arm to pass freely, a fixed arm is fixedly connected to the periphery of the connecting ring, the end of the fixed arm away from the connecting ring is fixedly connected to a floating block, a fixed rod is fixedly connected to the bottom of the sliding seat, a sliding pin is fixedly connected to the lower end of the fixed rod, the floating block is provided with a waist-shaped hole for the sliding pin to be inserted, and the length direction of the waist-shaped hole forms an angle with the axial direction of the fixed rod.

[0017] Furthermore, the elastic abutment unit comprises a spring wrapped around the connecting column, and the two ends of the spring in the direction of elastic force elastically abut the lower end surface of the piston and the upper end surface of the floating ring in a one-to-one correspondence, and the lower end of the connecting column is provided with an outwardly turned flange, and the flange is used to limit the downward movement of the floating ring. Furthermore, an annular rubber pad is embedded on the upper surface of the boss.

[0018] Furthermore, an annular cavity is provided inside the annular rubber pad, a plurality of oil outlet holes passing through the annular cavity are provided on the upper surface of the annular rubber pad, an oil storage cylinder is fixedly connected to the lower surface of the workbench, a connecting pipe that penetrates into the oil storage cylinder is fixedly connected to the lower end surface of the annular rubber pad, and an oil outlet unit is provided in the oil storage cylinder.

[0019] Furthermore, the oil outlet unit includes a sliding plug coaxially engaged in the oil storage cylinder, the sliding plug freely slides up and down in the oil storage cylinder, a tension spring is vertically installed in the oil storage cylinder, the two ends of the tension spring are respectively welded to the upper end surface of the sliding plug and the top wall of the oil storage cylinder, and the sliding plug is driven by the magnetic attraction structure to move downward. The tension spring generates a pulling force on the sliding plug, so that the sliding plug sprays the lubricating oil in the oil storage cylinder to the surface of the annular rubber pad, thereby filling the gap between the upper surface of the annular rubber pad and the bottom surface of the wafer, so that a large negative pressure adsorption force can be generated on the wafer.

[0020] Furthermore, the magnetic attraction structure comprises a magnetic attraction block embedded in the sliding plug, an ear block is fixedly connected to the periphery of the connecting ring, and a permanent magnet used in conjunction with the magnetic attraction block is provided on the ear block.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention performs negative pressure adsorption on the wafer through a negative pressure adsorption mechanism, and then clamps the edge of the wafer through a translation drive mechanism, so that the wafer can be automatically centered, and then the wafer is positioned on the boss, reducing the time consumed in the process of positioning the wafer processing position by an optical camera or CT, while reducing the wafer positioning deviation, and improving the wafer processing efficiency;

[0023] The present invention drives the piston to move downward through the cylinder, so that the piston draws out the air in the connecting cavity, thereby reducing the air pressure in the connecting cavity, and then the wafer can be negatively adsorbed. In addition, when the piston moves downward, it drives the connecting ring to move downward, so that the sliding seat moves toward the direction of the boss, and then the clamping block clamps the wafer. During the clamping process, the clamping block generates a thrust on the wafer, and the thrust is greater than the negative pressure adsorption force on the wafer, so that the wafer can be automatically centered.

[0024] The present invention generates tension on the sliding plug through the tension spring, so that the sliding plug sprays the lubricating oil in the oil storage cylinder to the surface of the annular rubber pad, thereby filling the gap between the upper surface of the annular rubber pad and the bottom surface of the wafer, so that a large negative pressure adsorption force can be generated on the wafer. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a positioning mechanism for a non-destructive laser scribing machine for a battery cell in the present invention;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of a part of the structure;

[0027] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0028] Figure 4 for Figure 2 Schematic diagram of the structure at an upward viewing angle;

[0029] Figure 5 It is a schematic diagram of the structure after the annular rubber pad and the connecting pipe are assembled in the present invention;

[0030] Figure 6 for Figure 5 A schematic cross-sectional view of a part of the structure;

[0031] Figure 7It is a schematic diagram of the structure after the connecting ring, connecting arm and floating block are assembled in the present invention;

[0032] Figure 8 It is a schematic diagram of the structure after the workbench and the boss are assembled in the present invention;

[0033] Fig. 9 for Figure 8 Schematic cross-sectional view of the structure.

[0034] In the figure, the description of each figure mark is as follows: 1. workbench; 2. boss; 3. sliding seat; 4. cylinder; 5. fixed seat; 6. floating block; 7. clamping block; 8. annular rubber pad; 9. adsorption hole; 10. connecting cavity; 11. connecting pipe; 12. piston; 13. spring; 14. connecting column; 15. floating ring; 16. connecting arm; 17. connecting ring; 18. sliding plug; 19. permanent magnet; 20. magnetic block; 21. fixed arm; 22. oil storage cylinder; 23. tension spring; 24. fixed rod; 25. guide column; 26. annular cavity; 27. air avoidance groove; 28. waist-shaped hole; 29. ​​slot; 30. oil outlet. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in 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.

[0036] See also Figure 1-Figure 9 The present invention provides a technical solution: a positioning mechanism for a non-destructive laser scribing machine for solar cells, comprising a workbench 1 mounted on the laser scribing machine, a boss 2 coaxially welded on the top of the workbench 1, a connecting cavity 10 provided inside the boss 2, a plurality of adsorption holes 9 intersecting the connecting cavity 10 provided on the top surface of the boss 2, a sliding seat 3 connected to the workbench 1, the sliding seat 3 freely slides along the radial direction of the workbench 1 on the workbench 1, and a clamping block 7 is fixedly connected to the upper surface of the sliding seat 3; a negative pressure adsorption mechanism provided on the workbench 1; and a translation drive mechanism provided on the workbench 1, the translation drive mechanism being used to drive the movement of the plurality of sliding seats 3. The wafer is subjected to negative pressure adsorption by the negative pressure adsorption mechanism, and the edge of the wafer is clamped by the translation drive mechanism, so that the wafer can be automatically centered, and then the wafer is positioned on the boss, reducing the time consumed in the process of positioning the wafer processing position by the optical camera or CT, while reducing the wafer positioning deviation, and improving the wafer processing efficiency.

[0037] The workbench 1 is provided with three slots 29 along its axial array, and a sliding seat 3 is engaged in the slot 29. The sliding seat 3 slides freely in the radial direction of the workbench 1 in the slot 29. A clamping block 7 is fixedly connected to the upper surface of the sliding seat 3. In addition, a rubber layer (not shown in the figure) is provided on the surface of the clamping block 7. In addition, a guide column 25 is horizontally fixedly connected to the inner wall of the slot 29, and a sliding hole for the guide column 25 to pass freely is provided on the sliding seat 3.

[0038] A fixed seat 5 is coaxially fixed to the bottom of the workbench 1. The interior of the fixed seat 5 is hollow and a piston 12 is engaged. The piston 12 slides vertically and freely in the fixed seat 5. The workbench 1 is provided with a connecting port connected to the inner cavity of the fixed seat 5 and the connecting cavity 10. A cylinder 4 is vertically installed at the bottom of the fixed seat 5. The cylinder rod of the cylinder 4 penetrates into the fixed seat 5 and is connected to a connecting column 14. The upper end of the connecting column 14 is fixed to the lower end surface of the piston 12; the piston is driven downward by the cylinder to cause the piston to extract the air in the connecting cavity, thereby reducing the air pressure in the connecting cavity, thereby enabling negative pressure adsorption of the wafer. In addition, when the piston moves downward, it drives the connecting ring to move downward, causing the sliding seat to move toward the direction of the boss, thereby causing the clamping block to clamp the wafer. During the clamping process, the clamping block generates a thrust on the wafer, and the thrust is greater than the negative pressure adsorption force on the wafer, thereby enabling the wafer to be automatically centered.

[0039] A floating ring 15 that can slide freely up and down is sleeved on the connecting column 14. The floating ring 15 slides freely on the connecting column 14. The connecting column 14 is provided with an elastic top unit for driving the floating ring 15 away from the piston 12. A connecting arm 16 is fixedly connected to the periphery of the floating ring 15. One end of the connecting arm 16 that passes through the fixed seat 5 is fixedly connected to a connecting ring 17. The fixed seat 5 is provided with an escape groove 27 for the connecting arm 16 to pass freely. A fixed arm 21 is fixedly connected to the periphery of the connecting ring 17. The fixed arm 21 is away from the connecting ring 17. A floating block 6 is fixedly connected to one end, a fixed rod 24 is fixedly connected to the bottom of the sliding seat 3, a sliding pin is fixedly connected to the lower end of the fixed rod 24, and a waist-shaped hole 28 for the sliding pin to be inserted is provided in the floating block 6, and the length direction of the waist-shaped hole 28 forms an angle with the axial direction of the fixed rod 24. A spring 13 is sleeved on the connecting column 14, and the two ends of the spring 13 in the elastic force direction correspond to each other elastically against the lower end surface of the piston 12 and the upper end surface of the floating ring 15. The lower end of the connecting column 14 is provided with an outward-turned flange, which is used to limit the downward movement of the floating ring 15;

[0040] The upper surface of the boss 2 is embedded with an annular rubber pad 8, and an annular cavity 26 is formed inside the annular rubber pad 8. The upper surface of the annular rubber pad 8 is provided with a plurality of oil outlet holes 30 penetrating the annular cavity 26. The lower surface of the workbench 1 is fixedly connected with an oil storage cylinder 22, and the oil storage cylinder 22 stores non-conductive lubricating oil. The lower end surface of the annular rubber pad 8 is fixedly connected with a connecting pipe 11 that penetrates into the oil storage cylinder 22. The oil storage cylinder 22 is coaxially engaged with a sliding plug 18, and the sliding plug 18 is inserted into the oil storage cylinder 22. The sliding plug 18 is free to slide downward, and a tension spring 23 is vertically installed in the oil storage cylinder 22. The two ends of the tension spring 23 are respectively welded to the upper end surface of the sliding plug 18 and the top wall of the oil storage cylinder 22. A magnetic block 20 is embedded in the sliding plug 18. The material of the magnetic block 20 can be any one of iron, cobalt and nickel. An ear block is fixed to the periphery of the connecting ring 17. A permanent magnet 19 used in conjunction with the magnetic block 20 is provided on the ear block. The permanent magnet 19 generates a magnetic attraction force on the magnetic block 20 through the oil storage cylinder 22. The tension spring generates a pulling force on the sliding plug, so that the sliding plug sprays the lubricating oil in the oil storage cylinder to the surface of the annular rubber pad, thereby filling the gap between the upper surface of the annular rubber pad and the bottom surface of the wafer, so that a large negative pressure adsorption force can be generated on the wafer.

[0041] The working principle of the present invention is as follows: the wafer is placed flat on the upper surface of the boss 2, the bottom surface of the wafer is against the upper surface of the annular rubber pad 8, and the wafer is located between the three clamping blocks 7, the cylinder 4 is started, the cylinder rod of the cylinder 4 is shortened and drives the connecting column 14 to move downward, and when the connecting column 14 moves downward, it will drive the piston 12 to move downward in the fixing seat 5, and when the piston 12 moves downward, the volume of the upper space of the inner cavity of the fixing seat 5 will increase, thereby causing part of the air in the connecting cavity 10 to enter the inner cavity of the fixing seat 5, so that the air pressure in the connecting cavity 10 is reduced, thereby generating negative pressure suction on the wafer;

[0042] When the piston 12 moves downward, it drives the floating ring 15, the connecting arm 16, the connecting ring 17 and the floating block 6 to move downward, thereby causing the sliding pin to slide in the waist-shaped hole 28, and the sliding pin slides from the lower end of the waist-shaped hole 28 in the length direction to its upper end, thereby driving the sliding pin to drive the fixed rod 24 and the sliding seat 3 to move in the direction of the boss 2, so that the three clamping blocks 7 move in the direction of the wafer, and the clamping blocks 7 clamp the periphery of the wafer. Since the clamping force of the clamping blocks 7 on the wafer is slightly greater than the negative pressure suction force on the wafer, the clamping blocks 7 will automatically center the wafer.

[0043] When the piston 12 moves downward, the connecting ring 17 drives the permanent magnet 19 to move downward, so that the magnetic attraction block 20 on the sliding plug 18 is separated from the magnetic attraction force of the permanent magnet 19, and the tension spring 23 will generate an upward pulling force on the sliding plug 18, so that the sliding plug 18 squeezes the lubricating oil in the oil storage cylinder 22, and the lubricating oil will enter the annular cavity 26 from the connecting pipe 11, and then overflow from the oil outlet 30, so that the lubricating oil can fill the gap between the bottom surface of the wafer and the upper surface of the annular rubber pad 8, so that the negative pressure suction force on the wafer is larger, thereby preventing the wafer from swinging when clamped by the clamping block 7;

[0044] When the clamping block 7 clamps the wafer, the piston 12 continues to move downward. At this time, the spring 13 will be squeezed by the piston 12, so that the spring 13 is in a compressed state and accumulates elastic potential energy, thereby preventing the clamping force of the clamping block 7 on the wafer from being too large to cause damage to the edge of the wafer. In addition, since the surface of the clamping block 7 is provided with a rubber layer, damage to the wafer is further reduced. When the bottom surface of the wafer is completely pressed against the surface of the annular rubber pad 8, the lubricating oil cannot continue to fill the gap between the surface of the annular rubber pad 8 and the wafer, so the lubricating oil cannot continue to overflow;

[0045] The external laser equipment performs laser dicing on the wafer. After the operation is completed, the cylinder rod of the cylinder 4 is extended and reset, causing the piston 12 to move upward. At the same time, the permanent magnet 19 approaches the magnetic block 20, thereby driving the magnetic block 20 to move downward, causing the tension spring 23 to be in a stretched state. At this time, the lubricating oil can no longer overflow from the oil outlet 30, and the clamping block 7 is separated from the clamping state with the wafer, and the negative pressure suction force on the wafer also disappears, allowing the wafer to be removed from the boss 2.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning mechanism for a non-destructive laser scribing machine for a cell, comprising a workbench (1) of the laser scribing machine, characterized in that: Also includes: A boss (2) coaxially fixed to the top of the workbench (1), a connecting cavity (10) being provided inside the boss (2), and a plurality of adsorption holes (9) intersecting the connecting cavity (10) being provided on the top surface of the boss (2); A sliding seat (3) connected to the workbench (1), the sliding seat (3) freely sliding on the workbench (1) along the radial direction of the workbench (1), and a clamping block (7) fixedly connected to the upper surface of the sliding seat (3); A negative pressure adsorption mechanism provided on the workbench (1); A translation driving mechanism disposed on the workbench (1), the translation driving mechanism being used to drive the plurality of sliding seats (3) to move; The negative pressure adsorption mechanism comprises a fixed seat (5) fixedly connected to the lower surface of the workbench (1); the fixed seat (5) is hollow inside and is engaged with a piston (12); the piston (12) slides vertically and freely in the fixed seat (5); the workbench (1) is provided with a communication port connected to the inner cavity of the fixed seat (5) and the connecting cavity (10); a cylinder (4) is vertically installed at the bottom of the fixed seat (5); the cylinder rod of the cylinder (4) penetrates into the fixed seat (5) and is connected to a connecting column (14); the upper end of the connecting column (14) is fixedly connected to the lower end surface of the piston (12); The translation drive mechanism comprises a floating ring (15) sleeved on the connecting column (14), the floating ring (15) sliding freely on the connecting column (14), the connecting column (14) being provided with an elastic abutting unit for driving the floating ring (15) away from the piston (12), the floating ring (15) being fixedly connected to a connecting arm (16) at its periphery, the connecting arm (16) passing through one end of the fixing seat (5) being fixedly connected to a connecting ring (17), the fixing seat (5) being provided with a The connecting arm (16) is provided with an escape groove (27) through which the connecting arm (16) can freely pass; a fixed arm (21) is fixedly connected to the periphery of the connecting ring (17); a floating block (6) is fixedly connected to one end of the fixed arm (21) away from the connecting ring (17); a fixed rod (24) is fixedly connected to the bottom of the sliding seat (3); a sliding pin is fixedly connected to the lower end of the fixed rod (24); a waist-shaped hole (28) is provided in the floating block (6) for the sliding pin to be inserted; and the length direction of the waist-shaped hole (28) forms an angle with the axial direction of the fixing rod (24); The elastic abutment unit comprises a spring (13) wound around the connecting column (14), and the two ends of the spring (13) in the elastic force direction elastically abut against the lower end surface of the piston (12) and the upper end surface of the floating ring (15) in a one-to-one correspondence. The lower end of the connecting column (14) is provided with an outward-turned flange, and the flange is used to limit the downward movement of the floating ring (15).

2. The positioning mechanism for a non-destructive laser scribing machine for a battery cell according to claim 1, characterized in that: The end surface of the workbench (1) is provided with a slot (29) for the sliding seat (3) to engage with, the sliding seat (3) slides freely in the slot (29), a guide column (25) is fixedly connected to the inner wall of the slot (29), and the sliding seat (3) is provided with a sliding hole for the guide column (25) to pass freely.

3. The positioning mechanism for a non-destructive laser scribing machine for a battery cell according to claim 1, characterized in that: The surface of the clamping block (7) is provided with a rubber layer.

4. The positioning mechanism for a non-destructive laser scribing machine for a battery cell according to claim 1, characterized in that: An annular rubber pad (8) is embedded on the upper surface of the boss (2).

5. The positioning mechanism for a non-destructive laser scribing machine for a battery cell according to claim 4, characterized in that: An annular cavity (26) is provided inside the annular rubber pad (8), a plurality of oil outlet holes (30) penetrating the annular cavity (26) are provided on the upper surface of the annular rubber pad (8), an oil storage cylinder (22) is fixedly connected to the lower surface of the workbench (1), a connecting pipe (11) penetrating into the oil storage cylinder (22) is fixedly connected to the lower end surface of the annular rubber pad (8), and an oil outlet unit is provided in the oil storage cylinder (22).

6. The positioning mechanism for a non-destructive laser scribing machine for a battery cell according to claim 5, characterized in that: The oil outlet unit comprises a sliding plug (18) coaxially engaged in the oil storage barrel (22); the sliding plug (18) slides freely up and down in the oil storage barrel (22); a tension spring (23) is vertically installed in the oil storage barrel (22); two ends of the tension spring (23) are respectively welded to the upper end surface of the sliding plug (18) and the inner top wall of the oil storage barrel (22); the sliding plug (18) is driven by a magnetic attraction structure to move downward.

7. The positioning mechanism for a non-destructive laser scribing machine for a battery cell according to claim 6, characterized in that: The magnetic attraction structure comprises a magnetic attraction block (20) embedded in the sliding plug (18); an ear block is fixedly connected to the periphery of the connecting ring (17); and a permanent magnet (19) is provided on the ear block for use with the magnetic attraction block (20).

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