A laser slotting device for an anti-ablation back plate for electrode sheet processing

Abstract

The application discloses a laser slot cutting device for an anti-ablation back plate for electrode sheet processing, and belongs to the technical field of energy storage device manufacturing and processing. The base installation bottom plate is provided with a side plate on one side. The material conveying assembly is arranged on the base installation bottom plate and comprises four supporting arms fixedly connected to the base installation bottom plate. The four supporting arms are jointly fixedly connected with a receiving plate for receiving the electrode sheet after coating and roller pressing. The side pushing assembly actively pushes out the slot cutting platform, so that the edge part to be cut of the electrode sheet completely falls on the through slot area of the receiving plate, and sufficient rigid support is obtained. On this basis, since the laser head and the compression roller are jointly arranged on the same connecting block, the compression roller immediately performs roller pressing correction on the high-temperature area in a very short time after the cutting action is completed, and the softened edge material is quickly flattened before cooling and setting.

Description

Technical Field

[0001] This invention belongs to the field of energy storage device manufacturing and processing technology, specifically a laser grooving device for an anti-ablation backplate for electrode sheet processing. Background Technology

[0002] In the electrode sheet processing technology of new energy batteries (such as lithium-ion batteries), grooving the edge of the electrode sheet is a key process for forming the electrode tab. With the popularization of laser processing technology, laser grooving has gradually replaced traditional mechanical punching methods and become the mainstream process for electrode sheet grooving due to its advantages such as high precision and non-contact processing.

[0003] The existing technology has the following main shortcomings:

[0004] 1. Existing laser grooving equipment causes the edge material to soften and warp after cutting the electrode edge due to the heat effect of the laser. There is a lack of effective means to immediately press and correct the edge warping. The warping problem seriously affects the quality of subsequent electrode stacking or winding processes.

[0005] 2. Existing equipment lacks effective backplate protection and heat dissipation slag removal structure. The laser is prone to ablation of the support platform, and the cutting slag splashes will contaminate the electrode surface, affecting product yield.

[0006] 3. The support structure of the existing grooving device is mostly fixed and cannot be quickly replaced. When the electrode specifications or grooving shape change, the entire platform needs to be replaced. The equipment has low flexibility and long changeover time, which greatly reduces production efficiency. Summary of the Invention

[0007] To overcome the above-mentioned defects, the present invention provides a laser grooving device for an anti-ablation backplate for electrode sheet processing, which solves the problems of easy warping of electrode edges, short service life of bearing platform and inconvenient maintenance in existing electrode sheet cutting equipment.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a laser grooving device for an anti-ablation backplate used in electrode sheet processing, comprising:

[0009] A base plate for basic installation, wherein a mounting side plate is also fixedly connected to one side of the base plate for basic installation;

[0010] The material conveying assembly is mounted on a base plate. The material conveying assembly includes four support arms fixedly connected to the base plate. A receiving plate for receiving coated and rolled electrode sheets is fixedly connected to all four support arms. A pair of rotating seats are fixedly connected to both ends of the receiving plate. A guide roller is rotatably connected between each pair of rotating seats.

[0011] A side-push assembly is disposed at the bottom of the receiving plate. The side-push assembly includes a combined frame plate installed at the bottom of the receiving plate. Two receiving cavities are opened at the bottom of the combined frame plate along the width direction of the combined frame plate. An electric telescopic rod is disposed in the receiving cavity. Two sliding tracks are also opened at the middle position of the bottom of the combined frame plate.

[0012] The output ends of the two electric telescopic rods are fixedly connected to a grooving platform. The grooving platform is fixedly connected to a sliding plate at the position of each of the two slide rails near the end of the electric telescopic rod. The sliding plate slides in cooperation with the slide rail at the corresponding position.

[0013] As a further aspect of the present invention: the grooving platform is slidably connected to a support plate and an anti-ablation liner from top to bottom. The support plate has a through groove that matches the required shape of the electrode sheet. The side of the grooving platform is connected to a side door via a hinge. Magnetic plates are fixedly connected to both sides of the grooving platform. Magnets are fixedly connected to both sides of the side door at positions corresponding to the magnetic plates. The side door is closed by the magnetic attraction between the magnets and the magnetic plates. The support plate and the anti-ablation liner can be replaced by manually opening and closing the side door.

[0014] As a further embodiment of the present invention: a gap for ventilation is formed between the support plate and the anti-ablation liner in the grooving platform; an air inlet and an air outlet are respectively opened on both sides of the grooving platform corresponding to the gap; a filter slag box is connected to one side of the air outlet; and an isolation net for isolating molten slag is provided at both the filter slag box and the air inlet.

[0015] As a further embodiment of the present invention: two pairs of sliding grooves are provided on the base mounting plate, and a sliding plate is slidably connected in each pair of sliding grooves. A fan is provided on the sliding plate, and the fan is respectively connected to the filter box or air inlet on the corresponding side. The fan on the air inlet side is configured to blow air, and the fan on the filter box side is configured to suck air, so as to form a flow channel in the grooving platform.

[0016] As a further embodiment of the present invention: a pair of support rods are fixedly connected to the mounting side plate, and the ends of the two support rods are fixedly connected to a transverse frame plate. Two balance slide rods are fixedly connected inside the transverse frame plate, and a lead screw is also provided between the two balance slide rods. The lead screw is rotatably connected inside the transverse frame plate. A servo motor for driving the lead screw to rotate is provided on one side of the transverse frame plate, and the output end of the servo motor is connected to the lead screw drive.

[0017] As a further embodiment of the present invention: a connecting block is slidably connected to both of the balance slide rods, and an internal threaded hole is opened at the center of the connecting block. The lead screw is threaded into the internal threaded hole on the connecting block. A pressure roller frame is fixedly connected to one side of the connecting block. A pressure roller for flattening and correcting the edge position of the cut electrode sheet is rotatably connected inside the pressure roller frame. A positioning seat is fixedly connected to one side of the pressure roller frame through a bracket, and the laser head for laser cutting is confined within the positioning seat.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. This invention actively pushes out the grooving platform using a side-push assembly (a precise fit between an electric telescopic rod, a combined frame plate, and a slide rail and slide plate), ensuring that the edge of the electrode to be cut rests completely on the through-groove area of ​​the support plate, achieving sufficient rigid support. Furthermore, since the laser head and pressure roller are mounted on the same connecting block, the pressure roller immediately performs rolling correction on the high-temperature area within a very short time after the cutting action, quickly flattening the softened edge material before it cools and solidifies. The side-push platform ensures that the electrode edge has a rigid backing, allowing the compaction stress of the pressure roller to act evenly and fully on the electrode edge, fundamentally suppressing heat-induced edge warping and significantly improving the flatness and straightness of the grooved edge.

[0020] 2. In this invention, a ventilation gap is reserved between the support plate and the anti-ablation liner inside the grooving platform, with air inlets and outlets corresponding to each other on both sides of the gap. A blower is installed on one side of the air inlet, and an exhaust fan is installed on the other side (connected to the filter box), thereby forming a unidirectional high-speed airflow duct with a clear flow direction within the gap. At the same time, the through slot on the support plate becomes the only connection between this airflow duct and the laser processing area. The residual laser energy after penetrating the electrode directly irradiates the anti-ablation liner (which can be made of high-temperature resistant ceramic or tungsten steel, etc.), and the liner bears the thermal shock, avoiding damage to the bottom plate of the grooving platform. Meanwhile, the continuous flow of cold air in the through gap forces convection heat dissipation on the liner, significantly extending the service life of the anti-ablation liner. Under the combined action of the positive pressure push of the blower and the negative pressure suction of the exhaust fan, molten slag and dust are forced from the through groove into the gap air duct below, and are quickly transported to the filter slag box for sedimentation and collection along the airflow direction. With the isolation nets set at the air inlet and the filter slag box, the accumulation of molten slag in the air duct or splashing onto the electrode surface is effectively prevented, thus avoiding secondary pollution and ensuring the cleanliness of the processing environment.

[0021] 3. In this invention, the support plate and the anti-ablation liner are installed in the grooving platform by sliding and inserting them in layers. The magnetic side door enables quick loading and unloading of the two plates. The operator only needs to manually pull open the side door to pull out the old plate and insert the new plate. Then, the side door is automatically closed by the attraction force between the magnet and the magnetic plate. No tools are needed, making the operation more convenient. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0024] Figure 3 This is a three-dimensional structural diagram of the side-pushing component of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the fan section of the present invention;

[0026] Figure 5 for Figure 4 Enlarged view of section A in the middle;

[0027] Figure 6 This is a three-dimensional internal structure diagram of the grooving platform of the present invention.

[0028] In the diagram: 1. Base plate; 2. Side plate; 3. Conveying assembly; 31. Support arm; 32. Receiving plate; 33. Rotating seat; 34. Guide roller; 4. Side push assembly; 41. Combined frame plate; 42. Accommodation cavity; 43. Electric telescopic rod; 44. Slide rail; 5. Grooving platform; 6. Slide plate; 7. Support plate; 8. Anti-ablation lining plate; 9. Side door; 10. Magnetic suction plate; 11. Magnet; 12. Filter box; 13. Sliding plate; 14. Fan; 15. Support rod; 16. Horizontal frame plate; 17. Balance slide bar; 18. Lead screw; 19. Servo motor; 20. Connecting block; 21. Pressure roller frame; 22. Pressure roller; 23. Positioning seat. Detailed Implementation

[0029] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0030] Example 1, referring to Figures 1-3 This is the first embodiment of the present invention. This embodiment provides a laser grooving device for an anti-ablation backplate for electrode sheet processing. The main explanation and description are of the material feeding assembly 3 and the side pushing assembly 4, which include: a base mounting plate 1, and a mounting side plate 2 fixedly connected to one side of the base mounting plate 1.

[0031] The material conveying assembly 3 is mounted on the base plate 1. The material conveying assembly 3 includes four support arms 31 fixedly connected to the base plate 1. A receiving plate 32 for receiving coated and rolled electrode sheets is fixedly connected to the four support arms 31. A pair of rotating seats 33 are fixedly connected to both ends of the receiving plate 32. A guide roller 34 is rotatably connected between each pair of rotating seats 33.

[0032] It should be noted that the material conveying assembly 3 is only used as a platform in the electrode transportation process and does not undertake the task of transporting the electrodes itself. Therefore, it does not have a drive structure for the electrodes. The receiving plate 32 supported by the four support arms 31 is used to receive the electrodes. To facilitate the smooth sliding of the electrodes on the receiving plate 32, a pair of rotating seats 33 are fixed at both ends of the receiving plate 32, that is, at the beginning and end of the electrode's travel direction. A guide roller 34 is rotatably installed between each pair of rotating seats 33. The electrodes enter from above one guide roller 34, spread flat across the receiving plate 32, and then exit from the other guide roller 34.

[0033] The side-push assembly 4 is located at the bottom of the receiving plate 32. The side-push assembly 4 includes a combined frame plate 41 installed at the bottom of the receiving plate 32. Two receiving cavities 42 are opened at the bottom of the combined frame plate 41 along the width direction of the combined frame plate 41. Electric telescopic rods 43 are installed in the receiving cavities 42. Two slides 44 are also opened at the middle position of the bottom of the combined frame plate 41. The output ends of the two electric telescopic rods 43 are fixedly connected to a grooving platform 5. The end of the grooving platform 5 near the electric telescopic rods 43 is fixedly connected to a sliding plate 6 at the position corresponding to the two slides 44. The sliding plate 6 slides and engages with the corresponding slides 44.

[0034] The side-push assembly 4 is the core structure driving the grooving platform 5. It is installed at the bottom of the receiving plate 32. The electric telescopic rod 43 in its accommodating cavity 42 can drive the grooving platform 5 to make any lateral displacement. The slide plate 6, together with the slide rail 44, can partially reduce the vertical pressure applied by the grooving platform 5 to the electric telescopic rod 43, and improve the stability of the grooving platform 5 when moving in the horizontal direction.

[0035] Example 2, refer to Figures 4-6This is the second embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a laser grooving device for an anti-ablation backing plate for electrode sheet processing and related descriptions of its grooving platform 5. The grooving platform 5 is mainly composed of a support plate 7 and an anti-ablation liner 8, which perform different functions respectively. It includes: the support plate 7 and the anti-ablation liner 8 are slidably inserted into the grooving platform 5 from top to bottom. The support plate 7 has a through groove that matches the shape required for cutting the electrode sheet. The side of the grooving platform 5 is connected to a side door 9 by a hinge. Magnetic suction plates 10 are fixedly connected to both sides of the grooving platform 5. Magnets 11 are fixedly connected to both sides of the side door 9 at positions corresponding to the magnetic suction plates 10. The side door 9 is closed by the magnetic attraction between the magnets 11 and the magnetic suction plates 10. The support plate 7 and the anti-ablation liner 8 can be replaced by manually opening and closing the side door 9.

[0036] The upper surface of the support plate 7 is used to support the electrode sheet, and a through groove is formed through it. The outline of the through groove is exactly the same as the shape that the electrode sheet needs to be cut into. The laser beam passes through the groove to cut the electrode sheet. The anti-ablation liner 8 is located directly below the support plate 7 and is used to withstand the laser energy after penetrating the electrode sheet, preventing the bottom plate of the grooving platform 5 from being ablated and damaged. Both can be replaced at will according to the processing requirements of the electrode sheet or after damage. The side door 9 can be tightly closed by the mutual magnetic attraction between the magnet 11 and the magnetic suction plate 10. The operator only needs to manually pull the side door 9 outward to overcome the magnetic attraction to open it, then pull out the old support plate 7 or the anti-ablation liner 8, insert the new one into the slide, and finally close the side door 9 to complete the replacement, making the operation more convenient.

[0037] In the grooving platform 5, there is a gap between the support plate 7 and the anti-ablation liner 8 for ventilation. Air inlets and air outlets are respectively opened on both sides of the grooving platform 5 at the corresponding gap positions. A slag filter box 12 is connected to one side of the air outlet. Both the slag filter box 12 and the air inlet are equipped with isolation nets (not shown in the figure) for isolating molten slag.

[0038] The support plate 7 and the anti-ablation liner 8 are not overlapped, but are intentionally left with a certain gap to form a ventilation and heat dissipation channel. The filter box 12 at the air outlet is used to collect the cutting slag and dust discharged with the airflow. In order to prevent large pieces of slag from entering other pipelines, an isolation net is specially installed for blocking.

[0039] Two pairs of sliding grooves are provided on the base plate 1. Each pair of sliding grooves is slidably connected to a sliding plate 13. A fan 14 is provided on the sliding plate 13. The fan 14 is connected to the filter box 12 or the air inlet on the corresponding side. The fan 14 on the air inlet side is set to blow air, and the fan 14 on the filter box 12 side is set to suction air, so as to form a flow channel in the cutting platform 5.

[0040] Two fans 14 blow and draw air in one direction, forming a high-speed air duct with one-way flow. This not only absorbs some of the heat generated during laser cutting, but also traps the molten slag and dust generated during cutting into the filter box 12 for deposition and collection, thus avoiding secondary pollution.

[0041] The rest of the structure is the same as in Example 1.

[0042] Example 3, referring to Figures 1-2 This is the third embodiment of the present invention. Unlike the previous embodiment, this embodiment provides a laser grooving device for an anti-ablation backplate used in electrode sheet processing, and a description of the pressure roller 22, which includes:

[0043] A pair of support rods 15 are fixedly connected to the mounting side plate 2. The ends of the two support rods 15 are fixedly connected to a horizontal frame plate 16. Two balance slide rods 17 are fixedly connected inside the horizontal frame plate 16. A lead screw 18 is also provided between the two balance slide rods 17. The lead screw 18 is rotatably connected inside the horizontal frame plate 16. A servo motor 19 for driving the lead screw 18 is provided on one side of the horizontal frame plate 16. The output end of the servo motor 19 is connected to the lead screw 18. A connecting block 20 is slidably connected to the two balance slide rods 17. An internal threaded hole is opened at the center of the connecting block 20. The lead screw 18 is threaded into the internal threaded hole on the connecting block 20. A pressure roller frame 21 is fixedly connected to one side of the connecting block 20. A pressure roller 22 for flattening and correcting the edge position of the cut electrode sheet is rotatably connected inside the pressure roller frame 21. A positioning seat 23 is fixedly connected to one side of the pressure roller frame 21 through a bracket. The laser head for laser cutting is confined within the positioning seat 23.

[0044] The servo motor 19 can drive the lead screw 18 to rotate, and the connecting block 20, which is threaded to the lead screw 18, can move along the axial direction of the lead screw 18. The balance slide bar 17 can further ensure the stability of the connecting block 20 during movement. The pressure roller 22 at the bottom of the pressure roller frame 21 on one side of the connecting block 20 can be pressed by the electrode sheet. The positioning seat 23 is not only able to move laterally with the pressure roller frame 21, but it can also slide laterally relative to the support to achieve multi-angle displacement of the laser head on the horizontal plane.

[0045] It should be noted that since both the laser head and the pressure roller 22 are fixed on the connecting block 20, they always maintain synchronous lateral movement. During the cutting process, the laser head first grooves the edge of the electrode sheet, and the pressure roller 22 immediately rolls the edge area that has just been heated, softened, and cut by the laser, thereby effectively preventing warping or deformation of the electrode sheet edge due to thermal stress. Subsequently, during the return stroke, the grooving platform 5 can be pushed towards the edge of the electrode sheet by the side push assembly 4. This pushing stroke should ensure that the edge of the electrode sheet to be cut is completely above the through-groove area of ​​the support plate 7. After the edge of the electrode sheet is effectively supported by the support plate 7, the pressure roller 22 rolls again to ensure uniform and reliable compaction.

[0046] The rest of the structure is the same as in Example 2.

[0047] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A laser grooving device for an anti-ablation backplate in electrode sheet processing, characterized in that, include: A base plate (1) is installed on one side of the base plate (1), and a side plate (2) is also fixedly connected to it. Material conveying assembly (3) is set on the base mounting plate (1). The material conveying assembly (3) includes four support arms (31) fixedly connected to the base mounting plate (1). A receiving plate (32) for receiving coated and rolled electrode sheets is fixedly connected to the four support arms (31). A pair of rotating seats (33) are fixedly connected to both ends of the receiving plate (32). A guide roller (34) is rotatably connected between each pair of rotating seats (33). Side push assembly (4), the side push assembly (4) is disposed at the bottom of the receiving plate (32), the side push assembly (4) includes a combined frame plate (41) installed at the bottom of the receiving plate (32), the bottom of the combined frame plate (41) is provided with two accommodating cavities (42) along the width direction of the combined frame plate (41), an electric telescopic rod (43) is provided in the accommodating cavity (42), and two slide rails (44) are also provided at the middle position of the bottom of the combined frame plate (41). The output ends of the two electric telescopic rods (43) are fixedly connected to a grooving platform (5). The grooving platform (5) is fixedly connected to a slide plate 6 at the position of the two slide rails 44 near the electric telescopic rod (43). The slide plate 6 slides in cooperation with the slide rail 44 at the corresponding position.

2. The laser grooving device for an anti-ablation backplate for electrode sheet processing according to claim 1, characterized in that: The grooving platform (5) is slidably connected to a support plate (7) and an anti-ablation liner (8) from top to bottom. The support plate (7) has a through groove that matches the shape required for cutting the electrode sheet. The side of the grooving platform (5) is connected to a side door (9) via a hinge. Both sides of the grooving platform (5) are fixedly connected to magnetic plates (10). Magnets (11) are fixedly connected to the sides of the side door (9) corresponding to the positions of the magnetic plates (10). The side door (9) is closed by the magnetic attraction between the magnets (11) and the magnetic plates (10). The support plate (7) and the anti-ablation liner (8) can be replaced by manually opening and closing the side door (9).

3. The laser grooving device for an anti-ablation backplate for electrode sheet processing according to claim 2, characterized in that: In the grooving platform (5), a gap for ventilation is formed between the support plate (7) and the anti-ablation liner (8). An air inlet and an air outlet are respectively opened on both sides of the grooving platform (5) corresponding to the gap position. A filter slag box (12) is connected to one side of the air outlet. An isolation net for isolating molten slag is provided at both the filter slag box (12) and the air inlet position.

4. The laser grooving device for an anti-ablation backplate for electrode sheet processing according to claim 3, characterized in that: The base plate (1) is provided with two pairs of sliding grooves. Each pair of sliding grooves is slidably connected with a sliding plate (13). A fan (14) is provided on the sliding plate (13). The fan (14) is connected to the filter box (12) or air inlet on the corresponding side. The fan (14) on the air inlet side is set to blow air, and the fan (14) on the filter box (12) side is set to suck air, so as to form a flow channel in the grooving platform (5).

5. The laser grooving device for an anti-ablation backplate for electrode sheet processing according to claim 1, characterized in that: A pair of support rods (15) are fixedly connected to the mounting side plate (2). The ends of the two support rods (15) are fixedly connected to a transverse frame plate (16). Two balance slide rods (17) are fixedly connected inside the transverse frame plate (16). A lead screw (18) is also provided between the two balance slide rods (17). The lead screw (18) is rotatably connected inside the transverse frame plate (16). A servo motor (19) for driving the lead screw (18) to rotate is provided on one side of the transverse frame plate (16). The output end of the servo motor (19) is connected to the lead screw (18) for transmission.

6. The laser grooving device for an anti-ablation backplate for electrode sheet processing according to claim 5, characterized in that: Two balance slide bars (17) are slidably connected to a connecting block (20). The connecting block (20) has an internal thread hole at its center. The lead screw (18) is threaded into the internal thread hole of the connecting block (20). A pressure roller frame (21) is fixedly connected to one side of the connecting block (20). A pressure roller (22) for flattening and correcting the edge position of the cut electrode is rotatably connected inside the pressure roller frame (21). A positioning seat (23) is fixedly connected to one side of the pressure roller frame (21) through a bracket. The laser head for laser cutting is confined within the positioning seat (23).

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