Pole piece slitting tool and pole piece slitting system

Abstract

The utility model provides a pole piece slitting cutter and a pole piece slitting system, the pole piece slitting cutter comprises a slitting knife and a knife rotator, the slitting knife is arranged on the knife rotator, two ends of the knife rotator are arranged on a knife shaft, and an insulator is arranged on the surface, contacted with the slitting knife, of the knife rotator, so that the slitting knife is insulated from the knife shaft. The cutter screw comprises a fixed ring and an outer ring, and the outer ring of the fixed ring is provided with an external thread section; an internal thread section matched with the external thread section is arranged on the inner ring of the outer ring, and the fixing ring is arranged on the internal thread section of the outer ring through the external thread section of the fixing ring. According to the utility model, the surface of the cutter rotating base in the slitting cutter is insulated, so that the slitting cutter is not conducted when not in contact, the reference is conveniently determined when the cutter is replaced, and the accurate position of the slitting cutter is determined by judging whether the slitting cutter is in contact or not, so that the problem of inaccurate spacing of the slitting cutters during slitting processing of the pole piece is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a pole piece cutting tool and a pole piece cutting system. Background Art

[0002] When cutting the pole piece, the upper and lower circular cutting knives rotate mutually to shear the pole piece. The accuracy of the distance between the upper and lower cutting knives directly affects the cutting quality, the life of the cutting knives, etc. The current pole piece cutting scheme has the following problems:

[0003] 1) When the slitting knife is installed, it is impossible to accurately detect the distance between the upper slitting knife and the lower slitting knife. If the distance is too small, the knife is easy to break, resulting in gaps in the pole piece and excessive burrs, which will cause the battery cell to short-circuit and catch fire, affecting the safety performance of the battery cell.

[0004] 2) When the slitting knife is installed, it is impossible to accurately detect the distance between the upper slitting knife and the lower slitting knife. If the distance is too large, it will easily lead to the electrode being cut off, wire drawing, and excessive burrs, resulting in short circuit and fire of the battery cell, affecting the safety performance of the battery cell.

[0005] 3) The installation of the slitting knife requires high skills of personnel, and the installation and debugging are time-consuming.

[0006] 4) The burrs must be detected at the end of each roll of pole pieces. Excessive burrs may cause the entire roll of pole pieces to be scrapped.

[0007] Therefore, by determining the distance between the upper slitting knife and the lower slitting knife during the electrode slitting process, the slitting quality of the electrode can be improved, thereby reducing the slitting burrs to ensure the improvement of the safety performance of the battery cell.

[0008] When determining the distance between the upper and lower cutting knives, the distance zero point can be determined by judging whether they are in contact with each other. This is usually determined manually, which requires rich experience and has errors. When the conductivity is used to determine whether the upper and lower cutting knives are in contact, the upper and lower cutting knives will be connected through the installation mechanism when they are not in contact, making it impossible to determine the distance zero point by judging whether the upper and lower cutting knives are in contact with each other.

[0009] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention and does not constitute any limitation to the present invention. Utility Model Content

[0010] In view of the shortcomings of the prior art mentioned above, the utility model provides a pole piece slitting tool and a pole piece slitting system, by insulating the surface of the knife rotating base in the slitting tool so that the slitting tool is not conductive when it is not in contact, and is conductive when the slitting tool is in contact and is determined as the reference of the spacing zero point, thereby determining the accurate spacing of the slitting tool, so as to solve the problem that it is impossible to determine the spacing zero point by judging whether the slitting tool is in contact by whether it is conductive.

[0011] The utility model provides a pole piece cutting tool, comprising a cutting knife and a knife rotary, wherein the cutting knife is mounted on the knife rotary, two ends of the knife rotary are mounted on a knife shaft, and an insulator is arranged on the surface of the knife rotary contacting the cutting knife to insulate the cutting knife from the knife shaft.

[0012] In one embodiment of the utility model, the cutter includes a fixed ring and an outer ring, the fixed ring is provided with an external thread segment on its outer ring; the outer ring is provided with an internal thread segment matching the external thread segment on its inner ring, wherein the fixed ring is installed on the internal thread segment of the outer ring through its external thread segment.

[0013] In one embodiment of the present invention, the insulator on the cutter wheel is located on the fixing ring.

[0014] In one embodiment of the utility model, the fixing ring includes a first section and a second end, the outer ring of the first section is provided with a scale, the outer ring of the second section is provided with an external thread section, and the outer diameter of the first section is greater than the outer diameter of the second section.

[0015] In one embodiment of the utility model, the outer ring includes a first part and a second part, the outer ring of the first part is also provided with a scale ruler, the second part is equipped with a slitting knife, the inner ring of the outer ring passes through the first part and the second part, and the outer diameter of the first part is larger than the outer diameter of the second part.

[0016] In one embodiment of the present invention, the pitch between the external thread section on the fixed ring and the internal thread section on the outer ring is 1 mm, and the outer ring 720 on the fixed ring and the outer ring is divided into a scale with a grid of 0.5 degrees.

[0017] In one embodiment of the present invention, a fixing block is further included. The fixing block is arranged in an annular shape and is mounted on the second portion of the outer ring. The fixing block and the first portion of the outer ring are respectively located on both sides of the slitting knife.

[0018] In one embodiment of the present invention, a clamping ring is further included, and the clamping ring is installed on a side of the fixing block away from the slitting knife.

[0019] In one embodiment of the utility model, it further comprises a spacer sleeve, which is arranged at both ends of the knife rotary so that the knife rotary is arranged on the knife shaft through the spacer sleeve.

[0020] The utility model also provides a pole piece slitting system, comprising a slitting tool as described above, and also comprising a first bearing seat and a second bearing seat, wherein the slitting tool mounted on the first bearing seat comprises a knife rotor and a first slitting knife; the slitting tool mounted on the second bearing seat comprises a second slitting knife; wherein the positions of the first slitting knife and the second slitting knife correspond to each other, and the first slitting knife and the second slitting knife are conductive when in contact.

[0021] In an embodiment of the present invention, a plurality of gaskets with different thicknesses are further installed on the first bearing seat and the second bearing seat.

[0022] The beneficial effects of the utility model include at least the following:

[0023] 1. The utility model proposes a pole piece cutting tool and a pole piece cutting system, which insulate the surface of the knife rotating base so that the upper and lower cutting knives are not conductive when they are not in contact, so as to facilitate the determination of the reference point by judging whether the cutting knife is conductive when replacing the cutting knife.

[0024] 2. Determine whether the upper and lower cutting knives are in contact by conducting electricity, so as to determine the exact distance between the upper and lower cutting knives, so as to improve the quality of electrode cutting and reduce the risk of burrs during the cutting process.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the pole piece cutting tool of the utility model;

[0028] Figure 2 It is a schematic diagram of the split structure of the pole piece cutting tool of the utility model;

[0029] Figure 3 It is a schematic diagram of a pole piece cutting tool of the utility model in one embodiment;

[0030] Figure 4 It is a schematic diagram of the pole piece cutting system of the utility model;

[0031] Figure 5 The utility model is a flow chart for the installation and debugging of the pole piece cutting tool.

[0032] In the figure: 100, slitting knife; 101, first slitting knife; 102, second slitting knife; 200, knife rotation; 210, fixing ring; 211, first section; 212, second section; 220, outer ring; 221, first part; 222, second part; 300, fixing block; 400, retaining ring; 500, spacer; 600, knife shaft; 610, first bearing seat; 620, second bearing seat. DETAILED DESCRIPTION

[0033] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific specific embodiments, rather than to limit the scope of protection of the present invention.

[0034] See also Figures 1 to 5 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any structural modification, change in proportional relationship, or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as position and quantitative relationship quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the utility model without substantial changes in the technical content.

[0035] See also Figure 1 The utility model provides a pole piece slitting tool, including a slitting knife 100 and a knife rotary 200, the slitting knife 100 is mounted on the knife rotary 200, both ends of the knife rotary 200 are mounted on a knife shaft 600, and an insulator is provided on the surface of the knife rotary 200 contacting the slitting knife 100 to insulate the slitting knife 100 from the knife shaft 600.

[0036] Specifically, the initial reference position of the slitting knife 100 needs to be determined before the electrode piece is slitting, so that after the electrode piece is assembled, the slitting knife 100 can be controlled to move to the desired position for processing according to the set parameters. In the embodiment of the utility model, by adding an insulator on the surface of the knife rotary 200, for example, an insulating coating can be added or an insulating member can be installed on the surface of the knife rotary 200, thereby preventing the knife rotary 200 from conducting electricity with the installed slitting knife 100, thereby preventing the knife rotary 200 from forming a conductive path between the installed knife shaft 600 and the structure of the machining device and connecting to the slitting knife 100 (for the machining device, the various structures thereof are conductors that are in contact with each other).

[0037] In this way, before processing the electrode, first determine whether the corresponding position of the slitting knife 100 and the machining device (for example, the position on the machining device where the electrode to be processed is located) is conductive. When a conductive path is detected, it indicates that the slitting knife 100 is in contact with the corresponding position on the machining device, and the slitting knife 100 is used as the reference point. Subsequently, the slitting knife 100 is moved away by controlling the knife shaft 600 to determine the slitting size. Next, the electrode to be processed is positioned at the corresponding position of the machining device, and then the positional relationship between the electrode to be processed and the reference point is determined, thereby obtaining a high-precision positional relationship between the slitting knife 100 and the electrode to be processed.

[0038] See also Figure 1 and Figure 2 In one embodiment, the knife rotary 200 includes a fixed ring 210 and an outer ring 220. The fixed ring 210 is provided with an outer thread segment on its outer ring; the outer ring 220 is provided with an inner thread segment matching the outer thread segment on its inner ring; wherein the fixed ring 210 is installed on the inner thread segment of the outer ring 220 through its outer thread segment. The insulator on the knife rotary 200 is located on the fixed ring 210.

[0039] Specifically, the knife rotary 200 is installed on the inner thread section of the outer ring 220 through the outer thread section of the fixing ring 210 to install the slitting knife 100. The fixing ring 210 in the knife rotary 200 is insulated, so that when the slitting knife 100 is installed, the slitting knife 100 is not connected to the structure of the machining device. In this way, when determining the reference point of the slitting knife 100, it can be determined whether the slitting knife 100 contacts the corresponding position of the machining device structure by measuring whether a path is formed therebetween.

[0040] Similarly, when adjusting the position of the slitting knife 100, the outer ring 220 of the knife rotary 200 is adjusted to drive the slitting knife 100 gradually close to the positioning position of the electrode to be cut on the machining device. When the slitting knife 100 is close to each other, conduction is formed, which can be detected. This represents the zero position. Then, by reversing the knife rotary 200 at a certain angle, the distance between the slitting knife 100 and the zero position can be determined.

[0041] Furthermore, the fixing ring 210 includes a first section 211 and a second section 212 . The first section 211 has a scale on its outer ring and an external thread section on its outer ring. The outer diameter of the first section 211 is greater than the outer diameter of the second section 212 .

[0042] The outer ring 220 includes a first part 221 and a second part 222. The outer ring of the first part 221 is also provided with a scale, and a slitting knife 100 is installed on its second part 222. The inner ring of the outer ring 220 passes through the first part 221 and the second part 222, and the outer diameter of the first part 221 is greater than the outer diameter of the second part 222.

[0043] Furthermore, in this embodiment, according to the function of the fixing ring 210 of the cutter 200, the fixing ring 210 is divided into a first section 211 and a second section 212 with different outer diameters, and an external thread section is formed by engraving a scale on the outer ring of the first section 211 and tapping the outer ring of the second section 212 to meet the function of the fixing ring 210 to assemble the outer ring 220 and realize the cutter 200.

[0044] Similarly, in this embodiment, according to the function of the outer ring 220 of the cutter 200, the outer ring 220 is divided into a first part 221 and a second part 222 with different outer diameters, and the first part 221 and the second part 222 have the same inner diameter to form a uniform inner ring size, and the inner threads are tapped on the inner ring to form an internal thread segment to match the external thread segment on the fixed ring 210. Similarly, a scale is engraved on the outer ring of the first part 221 to cooperate with the fixed ring 210 to realize the determination of the displacement distance through relative rotation between them.

[0045] Furthermore, the pitch of the external thread section on the fixing ring 210 and the internal thread section on the outer ring 220 is 1 mm, and the outer ring 720 on the fixing ring 210 and the outer ring 220 is divided into a scale with a grid of 0.5 degrees.

[0046] Specifically, the meshing pitch between the fixed ring 210 and the outer ring 220 in the knife rotary 200 is set to 1 mm, and the fixed ring 210 and the outer ring 220 are divided into 720 equal parts to form a scale with a grid of 0.5 degrees. In this way, by rotating the outer ring 220 of the knife rotary 200, the distance between the slitting knife 100 and the reference point is adjusted, wherein 1 grid of the scale represents a spacing of 1.4 μm, and the slitting knife 100 can be installed at a fixed spacing.

[0047] See also Figure 1 , Figure 2 and Figure 3 In one embodiment, a fixing block 300 and a snap ring 400 are further included. The fixing block 300 is arranged in an annular shape and is mounted on the second portion 222 of the outer ring 220. The fixing block 300 and the first portion 221 of the outer ring 220 are respectively located on both sides of the slitting knife 100. The snap ring 400 is mounted on the side of the fixing block 300 away from the slitting knife 100. A spacer 500 is also included. The spacer 500 is mounted on both ends of the knife rotary 200 so that the knife rotary 200 is mounted on the knife shaft 600 through the spacer 500. In this way, the fixing block 300 ensures that the slitting knife 100 is fixed on the outer ring 220 of the knife rotary 200, and the snap ring 400 ensures that the position of the fixing block 300 is stable. Finally, the knife rotary 200 is clamped and fixed by the spacers 500 at both ends to be mounted on the knife shaft 600.

[0048] See also Figure 4The utility model also provides a pole piece slitting system, including the slitting tool as described above, and also including a first bearing seat 610 and a second bearing seat 620, the slitting tool installed on the first bearing seat 610 includes a knife rotary 200 and a first slitting knife 101; the slitting tool installed on the second bearing seat 620 includes a second slitting knife 102; wherein the positions of the first slitting knife 101 and the second slitting knife 102 correspond, and the first slitting knife 101 and the second slitting knife 102 are conductive when in contact.

[0049] Furthermore, a plurality of gaskets with different thicknesses are installed on the first bearing seat 610 and the second bearing seat 620 .

[0050] Specifically, in the embodiment of the utility model, the upper blade shaft 600 on the first bearing seat 610 and the lower blade shaft 600 on the second bearing seat 620 are driven to rotate by two servo motors, and at the same time, the two blade shafts 600 respectively drive the first slitting knife 101, i.e., the upper slitting knife 101, and the second slitting knife 102, i.e., the lower slitting knife 102, to rotate relative to slit the pole pieces. The blade shaft 600 installed between the first bearing seat 610 and the second bearing seat 620 can also adjust the engagement distance between the upper slitting knife 101 and the lower slitting knife 102 by different gasket thicknesses, and is called the knife engagement amount. The distance between the upper slitting knife 101 and the lower slitting knife 102 is adjusted by rotating the blade 200, which is called the knife engagement amount.

[0051] In the existing processing method, the zero points of the upper slitting knife 101 and the lower slitting knife 102 before slitting the pole pieces are determined by the experience of the on-site operators, and there is still an error; and the error in the zero point can easily lead to the inaccurate amount of the knife, and it needs to be adjusted multiple times according to the slitting effect; at the same time, since the amount of the knife cannot be accurately determined, there are differences in each knife change, which also affects the slitting quality.

[0052] In the embodiment of the utility model, when the electrode slitting process is carried out, when the upper slitting knife 101 and the lower slitting knife 102 of the machining device itself are not in contact, they will be connected through the structure of the machining device, and the knife rotary 200 installed on the upper slitting knife 101 is changed to be insulated, so that when the upper slitting knife 101 and the lower slitting knife 102 are not in contact, they are used to measure the undisconnected state. Only when the upper slitting knife 101 and the lower slitting knife 102 are in contact, they are turned on, so as to judge whether the upper slitting knife 101 and the lower slitting knife 102 are in contact as a zero point reference.

[0053] More specifically, the contact point of the upper slitting knife 101 and the lower slitting knife 102 is used as the zero point reference, and the distance between the upper slitting knife 101 and the lower slitting knife 102 is determined by rotating the knife counterclockwise 200 degrees to separate the upper slitting knife 101 and the lower slitting knife 102 by a certain distance.

[0054] In this way, when adjusting the distance between the upper slitting knife 101 and the lower slitting knife 102, the upper slitting knife 101 is gradually brought close to the lower slitting knife 102 by adjusting the outer ring 220 of the knife rotary 200. When the upper slitting knife 101 and the lower slitting knife 102 are adjacent to each other, the upper slitting knife 101 and the lower slitting knife 102 are turned on and can be detected, which represents the zero position. Then, the knife rotary 200 is reversed by a certain angle to determine the accurate distance between the upper slitting knife 101 and the lower slitting knife 102, thereby maintaining the quality of electrode slitting.

[0055] See also Figure 5 In the embodiment of the utility model, when installing and debugging the slitting knife 100, first, according to the cutting size of the pole piece, adjust the position of the spacer sleeve 500 at the lower slitting knife 102 to install the lower slitting knife 102; then fix the upper slitting knife 101 to the knife rotary 200; then, according to the cutting size of the pole piece, adjust the position of the spacer sleeve 500 at the upper slitting knife 101, and install the knife rotary 200, so that a certain distance is reserved between the upper slitting knife 101 and the lower slitting knife 102; then install the remaining spacer sleeve 500 at the lower slitting knife 102, and fix the lower slitting knife 102; then install the remaining spacer sleeve 500 at the upper slitting knife 101, and fix the knife rotary 200; finally, install the remaining accessories of the slitting knife 100.

[0056] When adjusting the spacing between the upper slitting knife 101 and the lower slitting knife 102, firstly connect the upper slitting knife 101 and the lower slitting knife 102 electrically; then rotate the knife rotary 200 to make the upper slitting knife 101 gradually approach the lower slitting knife 102; when the upper slitting knife 101 and the lower slitting knife 102 are in contact, they are conductive; at this time, remember the readings of the scale ruler on the fixed ring 210 and the outer ring 220 in the knife rotary 200; then, according to the spacing requirement between the upper slitting knife 101 and the lower slitting knife 102, reverse the fixed number of grids on the scale ruler on the outer ring 220 of the knife rotary 200 to the required spacing requirement; finally, lock the outer ring 220 of the knife rotary 200 to complete the spacing adjustment between the upper slitting knife 101 and the lower slitting knife 102, that is, complete the installation of the upper slitting knife 101 and the lower slitting knife 102.

[0057] In summary, the utility model provides a pole piece slitting tool and a pole piece slitting system, by insulating the surface of the knife rotating base in the slitting tool, so that the slitting knife is not conductive when it is not in contact, and by judging whether the slitting knife is in contact, it is convenient to determine the reference when changing the knife, and then the slitting knife is retracted by the knife rotating to determine the exact position of the slitting knife, so as to ensure the accuracy of the slitting knife spacing during the pole piece slitting process and improve the slitting quality of the pole piece.

[0058] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A pole piece cutting tool, characterized in that: include: a slitting knife (100); and A knife rotor (200) is provided on which the slitting knife (100) is mounted. Both ends of the knife rotor (200) are mounted on a knife shaft (600). An insulator is provided on the surface of the knife rotor (200) that contacts the slitting knife (100) so as to insulate the slitting knife (100) from the knife shaft (600).

2. The slitting tool according to claim 1, characterized in that: The knife rotation (200) comprises: A fixing ring (210), wherein the fixing ring (210) is provided with an external thread section on its outer ring; and An outer ring (220), wherein the inner ring of the outer ring (220) is provided with an internal thread segment matching the external thread segment, Wherein, the fixing ring (210) is mounted on the internal thread section of the outer ring (220) through its external thread section.

3. The slitting tool according to claim 2, characterized in that: The insulator on the knife rotor (200) is located on the fixing ring (210).

4. The slitting tool according to claim 2, characterized in that: The fixing ring (210) comprises a first section (211) and a second section (212); a scale is arranged on the outer ring of the first section (211); the external thread section is arranged on the outer ring of the second section (212); and the outer diameter of the first section (211) is greater than the outer diameter of the second section (212).

5. The slitting tool according to claim 4, characterized in that: The outer ring (220) comprises a first part (221) and a second part (222); a scale is also provided on the outer ring of the first part (221); the slitting knife (100) is installed on the second part (222); the inner ring of the outer ring (220) passes through the first part (221) and the second part (222); and the outer diameter of the first part (221) is greater than the outer diameter of the second part (222).

6. The slitting tool according to claim 5, characterized in that: It also includes a fixing block (300), which is arranged in a ring shape and is installed on the second part (222) of the outer ring (220), and the fixing block (300) and the first part (221) of the outer ring (220) are respectively located on both sides of the slitting knife (100).

7. The slitting tool according to claim 6, characterized in that: It also includes a snap ring (400), which is installed on a side of the fixing block (300) away from the slitting knife (100).

8. The slitting tool according to claim 2, characterized in that: It also includes a spacer (500), which is installed at both ends of the knife rotary (200) so that the knife rotary (200) is installed on the knife shaft (600) through the spacer (500).

9. A pole piece cutting system, characterized in that: The slitting tool according to any one of claims 1 to 8 further comprises: A first bearing seat (610), wherein the slitting tool mounted on the first bearing seat (610) comprises a knife wheel (200) and a first slitting knife (101); A second bearing seat (620), wherein the slitting tool mounted on the second bearing seat (620) comprises a second slitting tool (102); The first slitting knife (101) and the second slitting knife (102) are located in corresponding positions, and the first slitting knife (101) and the second slitting knife (102) are electrically conductive when in contact.

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