Pole piece cutter mechanism

Abstract

The utility model discloses a pole piece cutter mechanism, and relates to the technical field of cutting equipment. The pole piece cutter mechanism comprises a lower cutter assembly, an upper cutter assembly, a driving assembly and a dust collection box. The lower cutter assembly comprises a lower cutter holder, a lower cutter and a pressing plate, the lower cutter is installed on the lower cutter holder, the pressing plate is arranged above the lower cutter holder in parallel, and a first guide assembly is arranged between the pressing plate and the lower cutter holder; the upper cutter assembly comprises an upper cutter holder and an upper cutter, the upper cutter holder is arranged above the pressing plate in parallel, a second guide assembly is arranged between the upper cutter holder and the lower cutter holder, and the upper cutter is installed at the bottom of the upper cutter holder; the driving assembly is installed at the bottom of the lower tool apron and used for driving the upper tool apron to drive the upper cutter to move up and down. The dust collection box is installed on the lower cutter holder and located beside the lower cutter, a plurality of dust collection openings which are evenly distributed at intervals are formed in the top of the dust collection box, and a negative pressure suction connector is formed in one end of the dust collection box. According to the pole piece cutter mechanism, the cutting precision of the pole piece can be guaranteed, and dust generated during cutting can be discharged in time.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting equipment, in particular to a cutting mechanism applied to lithium battery pole pieces. Background Art

[0002] Lithium batteries are made of layered battery electrodes that are wound or stacked. After coating, rolling and other processes, the battery electrodes need to be cut. The cut battery electrodes will be used in the subsequent battery assembly process. Existing cutting equipment generally cuts the battery electrodes by misaligning the upper and lower cutters. However, due to the material of the battery electrodes, dust will fall off when the electrodes are cut. After a long period of cutting, the blades of the upper and lower cutters will also be stained with a lot of dust, resulting in a rough cut of the cut electrode, affecting the quality of the battery electrodes. At the same time, as the electrodes undergo the subsequent battery assembly process, dust mixed into the battery cell will cause side reactions inside the battery, and in severe cases, it will cause an internal short circuit. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pole piece cutting mechanism which can not only ensure the cutting accuracy of the pole piece but also can timely discharge the dust generated during cutting.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A pole piece cutting mechanism comprises a lower cutting assembly, an upper cutting assembly, a driving assembly and a dust collecting box;

[0006] The lower cutter assembly includes a lower cutter seat, a lower cutter and a pressing plate. The lower cutter is mounted on the lower cutter seat. The pressing plate is arranged parallel to the upper portion of the lower cutter seat. A first guide assembly is provided between the pressing plate and the lower cutter seat.

[0007] The upper cutter assembly includes an upper cutter seat and an upper cutter. The upper cutter seat is arranged parallel to the pressure plate, and a second guide assembly is provided between the upper cutter seat and the lower cutter seat. The upper cutter is installed at the bottom of the upper cutter seat, and the upper cutter matches the lower cutter.

[0008] The drive assembly is installed at the bottom of the lower knife seat, which is used to drive the upper knife seat to drive the upper cutter to move up and down, thereby cooperating with the pressure plate to press the pole piece and cooperating with the lower cutter to cut the pole piece;

[0009] The dust collection box is installed on the lower knife seat and is located beside the lower cutter. The top of the dust collection box is provided with a plurality of dust collection ports evenly spaced, and one end of the dust collection box is provided with a negative pressure suction interface.

[0010] In some embodiments, two groups of first guide assemblies are provided, and the two groups of first guide assemblies are arranged at intervals. The first guide assemblies include a linear bearing, a pressure plate guide rod and a first compression spring. The linear bearing is vertically installed on the lower knife seat. The pressure plate guide rod is slidingly connected to the linear bearing and passes through the lower knife seat. The upper end of the pressure plate guide rod is fixedly connected to the pressure plate, and the lower end is fixedly connected with a locking sleeve. The first compression spring is vertically arranged beside the pressure plate guide rod, and the two ends of the first compression spring are respectively abutted against the pressure plate and the lower knife seat.

[0011] In at least one embodiment, a first blind hole is provided at the bottom of the pressure plate, and a second blind hole is provided on the top of the lower knife seat to match the first blind hole; both ends of the first compression spring are respectively abutted in the first blind hole and the second blind hole.

[0012] In some embodiments, two groups of second guide assemblies are provided, and the two groups of second guide assemblies are arranged at intervals. The second guide assembly includes a ball bushing assembly and a second compression spring. The ball bushing assembly includes a guide column, a ball sleeve and a bushing. The bushing is vertically fixed on the lower tool seat. The upper and lower ends of the guide column are fixedly connected to the upper tool seat and the drive assembly respectively. The second compression spring is sleeved on the upper part of the ball bushing assembly and abuts between the upper tool seat and the lower tool seat.

[0013] In at least one embodiment, the second guide assembly further comprises a stop sleeve, which is sleeved on the upper portion of the guide post and located above the bushing; the inner wall of the bushing is provided with a limiting shoulder matching the lower end of the stop sleeve.

[0014] Compared with the prior art, the present invention achieves at least the following beneficial effects:

[0015] The utility model is provided with a pressure plate. When the electrode moves to the cutting position, the driving component drives the upper knife seat downward, and the upper cutter descends with the upper knife seat. When the upper cutter descends to the position of the pressure plate, it clamps the electrode together with the pressure plate, and continues to descend to the lower cutter, and fits with the lower cutter to cut the electrode, thereby ensuring that the electrode can be cut stably; the utility model is provided with a first guide component and a second guide component. The first guide component can ensure the guiding accuracy of the pressure plate, so that the up and down movement of the pressure plate is more stable. The second guide component can ensure the guiding accuracy of the upper knife seat and the upper cutter, so that the up and down movement of the cutter on the pressure plate is more stable, thereby making the electrode cutting process more stable and ensuring the cutting accuracy of the electrode; the utility model is provided with a dust collection box, which can absorb the dust generated by cutting the electrode to avoid affecting the electrode cutting quality and battery safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0017] Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0018] Figure 2 for Figure 1 a rear view of the embodiment;

[0019] Figure 3 for Figure 1 A schematic structural diagram of a dust collection box according to an embodiment;

[0020] Figure 4 for Figure 1 An exploded view of the first guide assembly, the lower cutter mounting plate, and the laminating assembly of the embodiment;

[0021] Figure 5 for Figure 1 A schematic structural diagram of a second guide assembly of an embodiment;

[0022] Figure 6 for Figure 1 A schematic structural diagram of the lower cutter assembly and the upper cutter assembly of the embodiment;

[0023] Figure 7 for Figure 1 A schematic structural diagram of a tab induction assembly according to an embodiment.

[0024] The numbers in the figure are: 1. Lower cutter assembly; 11. Lower cutter seat; 111. Threaded through hole; 12. Lower cutter; 121. Chip groove; 13. Press plate; 2. Upper cutter assembly; 21. Upper cutter seat; 22. Upper cutter; 3. Drive assembly; 31. Cutter cylinder; 32. Floating joint; 33. Cylinder connecting plate; 4. Dust box; 41. Dust suction port; 42. Negative pressure suction interface; 5. First guide assembly; 51. Linear bearing; 52. Press plate guide rod; 521. Locking sleeve; 53. First pressure Compression spring; 6. Second guide assembly; 61. Ball bushing assembly; 611. Guide post; 612. Bushing; 62. Second compression spring; 63. Stop sleeve; 7. Buffer pad; 8. Tab sensing assembly; 81. Aluminum guide rail; 82. Fiber optic holder; 83. Right-angle fiber optic sensor; 9. Lower cutter mounting plate; 10. Fitting assembly; 101. Bearing seat; 102. Bearing; 103. Rotating shaft; 104. Third compression spring; 105. Hexagon socket set screw; 20. Threaded connector. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present invention can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present application more complete and to fully convey the concepts of the present application to those skilled in the art.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. A person skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them. Furthermore, "above," "above," and "above" a first feature may include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher level than the second feature. "Below," "below," and "below" a first feature may include the first feature being directly below or diagonally below the second feature, or simply indicate that the first feature is at a lower level than the second feature.

[0027] like Figures 1 to 7 As shown, the electrode cutting mechanism of the embodiment of the present application includes a lower cutting assembly 1, an upper cutting assembly 2, a driving assembly 3 and a dust collection box 4.

[0028] The lower cutter assembly 1 includes a lower cutter seat 11, a lower cutter 12, and a pressure plate 13. The lower cutter 12 is mounted on the lower cutter seat 11. The pressure plate 13 is arranged parallel to and above the lower cutter seat 11, with a first guide assembly 5 disposed between the pressure plate 13 and the lower cutter seat 11. The upper cutter assembly 2 includes an upper cutter seat 21 and an upper cutter 22. The upper cutter seat 21 is arranged parallel to and above the pressure plate 13, with a second guide assembly 6 disposed between the upper cutter seat 21 and the lower cutter seat 11. The upper cutter 22 is mounted at the bottom of the upper cutter seat 21 and matches the lower cutter 12. The drive assembly 3 is mounted at the bottom of the lower cutter seat 11 and is used to drive the upper cutter seat 21 to move the upper cutter 22 up and down, thereby cooperating with the pressure plate 13 to compress the electrode and cooperating with the lower cutter 12 to cut the electrode. The dust box 4 is installed on the lower knife seat 11 and is located next to the lower cutter 12. A number of evenly spaced dust suction ports 41 are provided on the top of the dust box 4. A negative pressure suction interface 42 is provided at one end of the dust box 4. The negative pressure suction interface 42 is for connection to an external negative pressure suction device. The dust box 4 is used to suck away the dust generated by cutting the electrode.

[0029] like Figure 4 As shown, in one embodiment, two groups of first guide assemblies 5 are provided, and the two groups of first guide assemblies 5 are spaced apart. The first guide assemblies 5 include a linear bearing 51, a pressure plate guide rod 52, and a first compression spring 53. The linear bearing 51 is vertically mounted on the lower cutter seat 11. The pressure plate guide rod 52 is slidably connected to the linear bearing 51 and passes through the lower cutter seat 11. The upper end of the pressure plate guide rod 52 is fixedly connected to the pressure plate 13, and the lower end is fixedly connected to a locking sleeve 521. The first compression spring 53 is vertically arranged beside the pressure plate guide rod 52, and the two ends of the first compression spring 53 respectively abut against the pressure plate 13 and the lower cutter seat 11. It should be noted that when the upper cutter 22 moves downward and the pressure plate 13 cooperates to press the pole piece, the first compression spring 53 is compressed to generate an upward elastic force, thereby pressing the pole piece tightly against the upper cutter 22. The pressure plate guide rod 52 cooperates with the linear bearing 51 to ensure guiding accuracy, making the up and down movement of the pressure plate 13 more stable.

[0030] Optionally, a first blind hole is provided at the bottom of the pressing plate 13, and a second blind hole adapted to the first blind hole is provided at the top of the lower knife seat 11; both ends of the first compression spring 53 abut against the first blind hole and the second blind hole respectively.

[0031] like Figure 5As shown, in one embodiment, two groups of second guide assemblies 6 are provided, and the two groups of second guide assemblies 6 are arranged at intervals, and the second guide assembly 6 includes a ball bushing assembly 61 and a second compression spring 62; the ball bushing assembly 61 includes a coaxially arranged guide column 611, a ball sleeve and a bushing 612, and the ball bushing assembly 61 is a bearing 102 device, which can perform linear motion and rotational motion. The structure of the ball bushing assembly 61 belongs to the existing technology in this field and will not be described in detail here; the bushing 612 is vertically fixed on the lower tool seat 11, and the upper and lower ends of the guide column 611 are fixedly connected to the upper tool seat 21 and the drive assembly 3 respectively, and the second compression spring 62 is sleeved on the upper part of the ball bushing assembly 61 and abuts between the upper tool seat 21 and the lower tool seat 11. It should be noted that the ball bushing assembly 61 can guide the upper knife seat 21 and the upper cutter 22, and the second compression spring 62 provides resistance to the upper cutter 22 when it moves downward, thereby making the pole piece cutting process smoother and improving the pole piece cutting quality.

[0032] Optionally, the second guide assembly 6 further includes a stopper sleeve 63, which is mounted on the upper portion of the guide post 611 and positioned above the bushing 612. The inner wall of the bushing 612 is provided with a stop shoulder that matches the lower end of the stopper sleeve 63. It should be noted that when the upper blade holder 21 and the upper cutter 22 descend, the stopper sleeve 63 slides downward to the stop shoulder on the inner wall of the bushing 612 to limit the position, thereby preventing direct collision between the upper blade holder 21 and the bushing 612 and thus preventing damage to the ball bushing assembly 61.

[0033] like Figure 1 As shown, in one embodiment, the drive assembly 3 includes a cutter cylinder 31, a floating joint 32 and a cylinder connecting plate 33. The cutter cylinder 31 is vertically installed at the bottom of the lower knife seat 11, the floating joint 32 is connected to the piston rod output end of the cutter cylinder 31, and the cylinder connecting plate 33 is installed on the floating joint 32. The cylinder connecting plate 33 is U-shaped and its two ends are fixedly connected to the lower ends of the two groups of guide columns 611 respectively.

[0034] like Figure 5 As shown, optionally, a buffer pad 7 is provided between the cylinder coupling plate 33 and the lower knife seat 11, and the buffer pad 7 is sleeved on the lower portion of the guide post 611. It should be noted that the buffer pad 7 is used to cushion the cylinder coupling plate 33, preventing the cylinder coupling plate 33 from hard contact with the lower knife seat 11 when the cylinder coupling plate 33 moves upward, thereby ensuring the stability of the upper knife seat 21 and the upper cutter 22.

[0035] like Figure 4As shown, in one embodiment, the pole piece cutter mechanism further includes a lower cutter mounting plate 9 and a fitting assembly 10; the lower cutter mounting plate 9 is fixed to the lower cutter seat 11 through a threaded connector 20, and the lower cutter 12 is fixedly connected to the lower cutter mounting plate 9; the fitting assembly 10 includes a bearing seat 101, a bearing 102, a rotating shaft 103, a third compression spring 104 and a hexagon socket set screw 105, the bearing seat 101 is located on both sides of the lower cutter mounting plate 9 and is mounted on the lower cutter seat 11, and the bearing 102 is provided at On the bearing seat 101, one end of the rotating shaft 103 is rotatably connected to the bearing 102, and the other end is fixedly connected to the side of the lower cutter mounting plate 9. A threaded through-hole 111 is provided on the lower cutter seat 11 below the rotating shaft 103. A hexagon socket set screw 105 is threadedly connected to the end of the threaded through-hole 111 away from the lower cutter mounting plate 9. A third compression spring 104 is inserted through the threaded through-hole 111, with one end of the third compression spring 104 abutting the lower cutter mounting plate 9 and the other end abutting the set screw. It should be noted that the third compression spring 104 provides an elastic force toward the lower portion of the lower cutter mounting plate 9, thereby pushing the lower cutter mounting plate 9 to rotate about the axis of the rotating shaft 103, thereby bringing the upper portion of the lower cutter mounting plate 9 closer to the upper cutter 22, ensuring that the cutting edge of the lower cutter 12 and the cutting edge of the upper cutter 22 are closely aligned, ensuring the cutting quality of the electrode.

[0036] like Figure 6 As shown, optionally, the top of the blade of the lower cutter 12 is set as an inclined surface, and a chip groove 121 is provided on the side of the lower cutter 12 close to the upper cutter 22, and the chip groove 121 is located below the blade of the lower cutter 12. It should be noted that when the upper cutter 22 descends to above the lower cutter 12, since the top of the blade of the lower cutter 12 is an inclined surface, the blade of the upper cutter 22 first fits with the highest point of the blade of the lower cutter 12, and then the upper cutter 22 continues to descend, thereby achieving cutting from one end of the electrode sheet to the other end along a straight line, thereby ensuring the cutting quality of the electrode sheet.

[0037] like Figure 7 As shown, in one embodiment, the pole piece cutting mechanism also includes a pole tab sensing assembly 8, which includes an aluminum guide rail 81, an optical fiber holder 82, and a right-angle optical fiber sensor 83. The aluminum guide rail 81 is installed on the front side of the lower knife seat 11, and the optical fiber holder 82 is fixedly connected to the aluminum guide rail 81. The right-angle optical fiber sensor 83 is fixedly connected to the optical fiber holder 82, which is used to detect the displacement of the pole tab on the pole piece to ensure that the pole tab on the pole piece is accurately cut.

[0038] Optionally, the upper cutter 22 and the lower cutter 12 are made of tungsten steel, which has high hardness and wear resistance. The cutting edges of the upper cutter 22 and the lower cutter 12 are ultra-precision ground and are sharp and durable.

[0039] The working principle of the pole piece cutting mechanism is:

[0040] When the pole piece travels to the cutting position, the cutter cylinder 31 extends, pushes the cylinder connecting plate 33 to move downward, the cylinder connecting plate 33 drives the upper cutter seat 21 to move downward through the guide column 611, the upper cutter 22 moves downward with the upper cutter seat 21, when the upper cutter 22 moves to the position of the pressing plate 13, the upper cutter 22 clamps the pole piece together with the pressing plate 13, continues to move downward to the lower cutter 12, and is in close contact with the lower cutter 12 to form a scissor mouth, cuts the pole piece, and at the same time, the dust box 4 sucks away the dust generated by cutting the pole piece, the cutter cylinder 31 is retracted, pulls the cylinder connecting plate 33 to move upward, the cylinder connecting plate 33 drives the upper cutter seat 21 to move upward through the guide column 611, and the upper cutter 22 retreats to the initial position with the upper cutter seat 21, and thus the working cycle is completed.

[0041] It should be understood that all the above embodiments are exemplary but not restrictive, any modification, equivalent change and modification made by the person skilled in the art to the above described specific embodiments are still within the scope of the technical scheme of the utility model.

Claims

1. A pole piece cutting mechanism, characterized in that: It includes a lower cutter assembly, an upper cutter assembly, a drive assembly and a dust collection box; The lower cutter assembly includes a lower cutter seat, a lower cutter and a pressing plate, wherein the lower cutter is mounted on the lower cutter seat, the pressing plate is arranged parallel to the upper portion of the lower cutter seat, and a first guide assembly is provided between the pressing plate and the lower cutter seat; The upper cutter assembly includes an upper cutter seat and an upper cutter, the upper cutter seat is arranged parallel to the pressure plate, and a second guide assembly is provided between the upper cutter seat and the lower cutter seat. The upper cutter is installed at the bottom of the upper cutter seat, and the upper cutter matches the lower cutter. The driving assembly is mounted at the bottom of the lower cutter seat, and is used to drive the upper cutter seat to move the upper cutter up and down, thereby cooperating with the pressing plate to press the pole piece and cooperating with the lower cutter to cut the pole piece; The dust collection box is installed on the lower knife seat and is located beside the lower cutter. The top of the dust collection box is provided with a plurality of dust collection ports evenly spaced, and one end of the dust collection box is provided with a negative pressure suction interface.

2. The electrode cutting mechanism according to claim 1, characterized in that: The first guide assembly is provided with two groups, and the two groups of the first guide assemblies are arranged at intervals. The first guide assembly includes a linear bearing, a pressure plate guide rod and a first compression spring. The linear bearing is vertically installed on the lower knife seat. The pressure plate guide rod is slidingly connected to the linear bearing and passes through the lower knife seat. The upper end of the pressure plate guide rod is fixedly connected to the pressure plate, and the lower end is fixedly connected with a locking sleeve. The first compression spring is vertically arranged beside the pressure plate guide rod, and the two ends of the first compression spring are respectively abutted against the pressure plate and the lower knife seat.

3. The electrode cutting mechanism according to claim 2, characterized in that: A first blind hole is provided at the bottom of the pressure plate, and a second blind hole adapted to the first blind hole is provided at the top of the lower knife seat; two ends of the first compression spring are respectively abutted in the first blind hole and the second blind hole.

4. The electrode cutting mechanism according to claim 1, characterized in that: The second guide assembly is provided with two groups, and the two groups of the second guide assemblies are arranged at intervals. The second guide assembly includes a ball bushing assembly and a second compression spring. The ball bushing assembly includes a guide column, a ball sleeve and a bushing. The bushing is vertically fixed on the lower knife seat. The upper and lower ends of the guide column are fixedly connected to the upper knife seat and the driving assembly respectively. The second compression spring is sleeved on the upper part of the ball bushing assembly and abuts between the upper knife seat and the lower knife seat.

5. The electrode cutting mechanism according to claim 4, characterized in that: The second guide assembly further comprises a stop sleeve, which is sleeved on the upper portion of the guide post and located above the bushing; the inner wall of the bushing is provided with a limiting shoulder that matches the lower end of the stop sleeve.

6. The electrode cutting mechanism according to claim 4, characterized in that: The driving assembly includes a cutter cylinder, a floating joint and a cylinder connecting plate. The cutter cylinder is vertically installed at the bottom of the lower knife seat. The floating joint is connected to the piston rod output end of the cutter cylinder. The cylinder connecting plate is installed on the floating joint. The cylinder connecting plate is U-shaped and its two ends are fixedly connected to the lower ends of the two groups of guide columns.

7. The electrode cutting mechanism according to claim 6, characterized in that: A buffer pad is provided between the cylinder connecting plate and the lower knife seat, and the buffer pad is sleeved on the lower part of the guide column.

8. The electrode cutting mechanism according to claim 1, characterized in that: The cam is secured to the bottom of the blade and is secured to the blade's upper edge with respect to the lower blade.

9. The electrode cutting mechanism according to claim 1, characterized in that: The top of the blade of the lower cutter is set as an inclined surface, and a chip removal groove is provided on a side of the lower cutter close to the upper cutter, and the chip removal groove is located below the blade of the lower cutter.

10. The electrode cutting mechanism according to claim 1, characterized in that: It also includes a tab sensing component, which includes an aluminum guide rail, an optical fiber holder, and a right-angle optical fiber sensor. The aluminum guide rail is installed on the front side of the lower tool holder, the optical fiber holder is fixedly connected to the aluminum guide rail, and the right-angle optical fiber sensor is fixedly connected to the optical fiber holder, which is used to detect the displacement of the tab on the pole piece.

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