Device for cutting pole pieces of lithium-ion batteries

Abstract

The utility model relates to the field of lithium-ion batteries, and discloses a device for cutting pole pieces of lithium-ion batteries, comprising: a base, on which first transverse position adjustment mechanisms extending horizontally along the X-axis are respectively arranged, on which a first lifting part capable of vertically lifting and lowering along the Z-axis is installed, and a cutting mechanism and a first brush mechanism are installed at the end of the first lifting part close to the pole piece, the first brush mechanism is located behind the cutting mechanism, and the pole piece to be cut is horizontally translated from front to back along the Y-axis under the transmission of a transmission device, and when the first lifting part moves to a predetermined position in the direction close to the pole piece, when the cutting knife of the cutting mechanism acts on the surface of the translated pole piece, the bristles of the first brush mechanism contact the pole piece, and the pole piece is cut into two pole piece strips by the cutting knife, and the cutting parts and surfaces of the two pole piece strips are translated through the first brush and contact the bristles of the first brush. The application of this scheme is conducive to improving the quality of the pole piece strips obtained by cutting.

Description

Technical Field

[0001] The utility model relates to the field of battery packs, in particular to a device suitable for cutting pole pieces of lithium ion batteries. Background Art

[0002] As batteries are used more and more widely, lithium-ion batteries are increasingly used due to their environmental advantages. Lithium-ion batteries mainly include pole pieces and separators between the two pole pieces. The preparation of pole pieces mainly includes: slurry stirring, coating, rolling, and slitting. Pole piece slitting is also called stripping, which specifically involves cutting the wider pole piece obtained after coating and rolling into multiple strips to obtain multiple pole piece strips with narrower widths.

[0003] During the research process of the present invention, the inventors found that the pole piece coating is a composite material composed of particles and has almost no plastic deformation ability. During cutting, some polar particles will inevitably fall off and fall on the pole piece. Other dust may also fall on the pole piece, which will affect the quality of the pole piece. Summary of the invention

[0004] One of the purposes of the embodiments of the utility model is to provide a device suitable for cutting pole pieces of lithium-ion batteries. The application of this solution is conducive to improving the quality of the pole piece strips obtained by cutting.

[0005] The present invention provides a device for cutting pole pieces of lithium-ion batteries, comprising: a base,

[0006] The bases are respectively provided with first lateral position adjustment mechanisms extending horizontally along the X-axis, and the first lifting part capable of being lifted and lowered along the Z-axis is installed on the first lateral position adjustment mechanisms.

[0007] A slitting mechanism and a first brush mechanism are installed at the end of the first lifting part close to the pole piece. The first brush mechanism is located behind the slitting mechanism.

[0008] The cut pole pieces are transported by the conveyor and move horizontally from front to back along the Y axis.

[0009] When the first lifting part moves to a predetermined position in a direction close to the pole piece, the slitting knife of the slitting mechanism acts on the surface of the pole piece, and the bristles of the first brush mechanism contact the pole piece.

[0010] The electrode piece is cut into two electrode piece strips by the cutting knife, and the cutting parts and surfaces of the two electrode piece strips are translated through the first brush mechanism and contact the bristles of the first brush mechanism.

[0011] Optionally, it also includes,

[0012] The first slider is installed on the first guide rail extending along the X-axis of the first transverse position adjustment mechanism and can be transversely moved along the first guide rail. The first lifting part is installed on the first slider.

[0013] Optionally, it also includes,

[0014] The first dust hood is provided with bristles of the first brush mechanism covered in the first dust hood, and the first dust hood is connected with a negative pressure dust collection pipe.

[0015] Optionally, a first cylinder is connected to the end of the first lifting part away from the pole piece, and the first cylinder is used to drive the first lifting part to move up and down.

[0016] Optionally, it also includes,

[0017] a second lateral position adjustment mechanism, mounted on the base and parallel to the first lateral position adjustment mechanism;

[0018] A second lifting part, mounted on the second lateral position adjustment mechanism, capable of lifting and lowering along the Z axis;

[0019] A second brush mechanism is installed at an end of the second lifting part close to the pole piece, and the pole piece moves horizontally between the first brush mechanism and the second brush mechanism.

[0020] When the second lifting part moves to a predetermined position in a direction close to the pole piece, the cutting parts and surfaces of the two pole piece strips obtained by cutting translate through the second brush mechanism and contact the bristles of the second brush mechanism.

[0021] Optionally, it also includes,

[0022] The second slider is installed on the guide rail extending along the X-axis of the second transverse position adjustment mechanism and can move transversely along the guide rail. The second lifting part is installed on the second slider.

[0023] Optionally, it also includes:

[0024] The second dust hood covers the bristles of the second brush mechanism, and the second dust hood is connected to the negative pressure dust collection pipeline.

[0025] Optionally, a second cylinder is connected to the end of the second lifting part away from the pole piece, and the second cylinder is used to drive the second lifting part to move up and down.

[0026] Optionally, the central axes of the first brush mechanism and the second brush mechanism are also connected to motors respectively, and rotate under the drive of the motors.

[0027] Optionally, a plurality of winding devices are provided at the rear end of the Y-axis for winding up the pole piece strips obtained by slitting.

[0028] As can be seen from the above, by adopting the technical scheme of this embodiment, a first brush mechanism is further provided behind the first cutting mechanism of the electrode. The bristles of the first brush mechanism pass through the cutting edges and surfaces of the electrode strips obtained by cutting, and brush away the dust on the cutting parts and the surfaces of the electrode strips, so as to prevent metal dust or polar active material dust generated by the cutting from remaining on the surface of the electrode strips and affecting the quality of the electrode. That is, the adoption of this scheme is conducive to improving the quality of the electrode strips obtained by the cutting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute an improper limitation of the present invention.

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a slitting device provided in an embodiment of the utility model;

[0031] Figures 2 to 7 Schematic diagram of the structure of the slitting device provided in the embodiment of the utility model, in top, bottom, front, rear, left and right views;

[0032] Figure 8 A schematic diagram of the disassembly structure of the cutter and the first brush mechanism in the slitting device provided in an embodiment of the utility model;

[0033] Fig. 9 A schematic diagram of the disassembly structure of the second brush mechanism in the slitting device provided in an embodiment of the utility model;

[0034] Fig.10 A schematic diagram of the bottom three-dimensional structure of the slitting device provided in an embodiment of the utility model.

[0035] 1: base;

[0036] 21: first lateral position adjustment mechanism; 211: first guide rail;

[0037] 22: second lateral position adjustment mechanism; 221: second guide rail;

[0038] 31: first lifting part; 32: second lifting part;

[0039] 4: slitting mechanism; 41: slitting knife;

[0040] 51: first brush mechanism; 52: second brush mechanism;

[0041] 61: first slider; 62: second slider;

[0042] 71: first dust hood; 72: second dust hood DETAILED DESCRIPTION

[0043] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0044] See also Figure 1-10 Show.

[0045] The present embodiment provides a device for cutting pole pieces of lithium-ion batteries, which mainly comprises: a base 1 , a first lateral position adjustment mechanism 21 , a first lifting portion 31 , a cutting mechanism 4 , and a first brush mechanism 51 .

[0046] The base 1 is a supporting platform for the components of the device, has a certain width, and can be a platform structure or a frame structure or composed of multiple discrete components.

[0047] For the convenience of description, in this embodiment, the horizontal extension direction of the first lateral position adjustment mechanism 21 is recorded as the X-axis; the horizontal translation transmission direction of the pole piece is recorded as the Y-axis; the plane formed by the X and Y axes is the horizontal plane, and the direction perpendicular to the X and Y axes of the horizontal plane is the Z-axis.

[0048] The first lateral position adjustment mechanism 21 is installed on the base 1. For the following description, this embodiment is schematically illustrated as the first lateral position adjustment mechanism 21 being arranged above the base 1 and the pole piece passing under the first lateral position adjustment mechanism 21.

[0049] During the preparation of the electrode sheet, a wider electrode sheet is obtained after coating, drying and rolling processes. The wider electrode sheet is translated from below the first lateral position adjustment mechanism 21, and the transmission direction of the electrode sheet is from front to back.

[0050] The first transverse position adjustment mechanism 21 extends along the horizontal X-axis, and the first lifting part 31 is installed on the first transverse position adjustment mechanism 21, and can be adjusted transversely along the X-axis along the first transverse position adjustment mechanism 21. The slitting mechanism 4 and the first brush mechanism 51 are installed on the first lifting part 31, and the first brush mechanism 51 is located behind the slitting mechanism 4. Driven by the first lifting part 31, the slitting mechanism 4 and the first brush mechanism 51 can be synchronously lifted and lowered vertically along the Z-axis.

[0051] When the first lifting part 31 moves to a predetermined position in the direction close to the electrode, the slitting knife 41 located at the end of the slitting mechanism 4 acts on the translated electrode, and the translated electrode moves relative to the slitting knife 41. After passing through the slitting knife 41, it is divided into two electrode strips, and the two electrode strips obtained by slitting continue to translate backward under the drive of the electrode conveying mechanism. At this time, the bristles of the first brush mechanism 51 located behind the slitting knife 41 are in contact with the slitting part and surface of the electrode strip after slitting, and brush off the dust on the slitting part and surface of the electrode strip. The electrode strip with the dust brushed off continues to translate backward under the drive of the electrode conveying mechanism, and each electrode strip is rolled up separately at the end, or conveyed to the next process.

[0052] As can be seen from the above, by adopting the technical scheme of this embodiment, a first brush mechanism is further provided behind the first cutting mechanism of the electrode. The bristles of the first brush mechanism pass through the cutting edges and surfaces of the electrode strips obtained by cutting, and brush away the dust on the cutting parts and the surfaces of the electrode strips, so as to prevent metal dust or polar active material dust generated by the cutting from remaining on the surface of the electrode strips and affecting the quality of the electrode. That is, the adoption of this scheme is conducive to improving the quality of the electrode strips obtained by the cutting process.

[0053] As an illustration of this embodiment, the first brush is provided with a wider width to increase the width of the surface of the two-pole strips that it can brush, thereby improving the dust removal effect.

[0054] As an illustration of this embodiment, the first lateral position adjustment mechanism 21 is provided with at least one guide rail extending along the X-axis, which is denoted as the first guide rail 211 , wherein the number of the first guide rails 211 is preferably at least two.

[0055] The device of this embodiment also includes a first slider 61, which is sleeved on the two first guide rails 211 of the first transverse position adjustment mechanism 21, and the first slider 61 can be adjusted along the two first guide rails 211 in the X-axis translation. Compared with the solution with only one first guide rail 211, the first slider 61 is sleeved on the two first guide rails 211, which can improve the stability of the transverse movement of the first slider 61 along the X-axis. Avoid shaking. Furthermore, the first lifting part 31 is installed on the first slider 61, so that the first lifting part 31 is adjusted along the X-axis transverse movement with the first slider 61 to adjust the cutting position of the pole piece, and the transverse adjustment is more stable and convenient.

[0056] As an illustration of this embodiment, a first dust hood 71 may be further provided, and the bristles of the first brush mechanism 51 are covered in the first dust hood 71, and the first dust hood 71 is also connected to a negative pressure dust suction pipe (not shown in the figure). In this way, the dust brushed off by the first brush mechanism 51 is covered in the first dust hood 71, and is sucked to the outside through the negative pressure dust suction pipe, which effectively improves the dust cleaning effect of the electrode strip and prevents the dust from spreading to the outside, thereby realizing a dust-free workshop.

[0057] As an illustration of this embodiment, a first driving motor is also provided on the first brush mechanism 51 of this embodiment. The first driving motor is connected to the central axis of the first brush mechanism 51. The brush rotates along its central axis driven by the driving motor, thereby improving the dust cleaning efficiency of the bristles on the electrode strips and improving the dust cleaning effect.

[0058] As an illustration of this embodiment, the end of the first lifting part 31 away from the pole piece can be connected to the gas rod (referred to as the first cylinder, not shown in the figure), and the first cylinder drives the first lifting part 31 to move vertically up and down, driving the slitting mechanism 4 and the first brush mechanism 51 to move up and down. The reciprocating stroke of the first cylinder is controlled, the lifting position of the slitting knife 41 of the slitting mechanism 4 and the first brush mechanism 51 is controlled, and the vertical lifting of the slitting knife 41 and the first brush mechanism 51 is accurately positioned, so as to improve the pole piece slitting and dust removal effects.

[0059] As an illustration of this embodiment, a second transverse position adjustment mechanism 22 is also installed under the base 1. The structure of the second transverse position adjustment mechanism 22 can be but is not limited to being the same as the first transverse position adjustment mechanism 21, and the installation position of the second transverse position adjustment mechanism 22 can be but is not limited to being in a horizontal mirror relationship with the first transverse position adjustment mechanism.

[0060] Similarly, the second lateral position adjustment mechanism 22 is provided with a second guide rail 221 extending horizontally along the X-axis, and a second slider 62 is sleeved thereon and can slide along the second guide rail 211. The second lifting part 32 is installed on the second slider 62, and the second cylinder is connected to the upper end of the second lifting part 32, and the second cylinder controls the lifting of the second lifting part 32. The second brush mechanism 52 is provided at the end of the second lifting part 32 close to the pole piece, and the second brush mechanism 52 is located below the pole piece, and the Y-axis coordinate of the second brush mechanism 52 is located behind the Y-axis coordinate of the slitting mechanism 4.

[0061] When the first lifting part 31 descends in the direction close to the pole piece, the second lifting part 32 moves synchronously and rises in the direction close to the pole piece, so that when the slitting knife 41 at the end of the slitting mechanism 4 acts on the translated pole piece, the bristles of the first brush mechanism 51 and the second brush mechanism 52 respectively contact the upper and lower surfaces of the slitting pole piece strip; the slitting knife 41 slits the translated pole piece into two pole piece strips, and the bristles of the first brush mechanism 51 and the second brush mechanism 52 act on the slitting part and the two surfaces of the pole piece strip from the upper and lower directions respectively, and jointly clean the slitting part and the surface of the slitting pole piece strip. The adoption of this scheme can further improve the dust cleaning efficiency of the pole piece strip, improve the dust cleaning effect, and improve the quality of the pole piece strip.

[0062] As an illustration of this embodiment, the second brush mechanism is provided with a wider range of brush widths, thereby increasing the width of the surface of the two-pole strips that can be brushed, thereby improving the dust removal effect.

[0063] As an illustration of this embodiment, a second dust hood 72 may be further provided, the second dust hood 72 covers the outside of the bristle structure of the second brush mechanism 52, and the second dust hood 72 is connected to the negative pressure dust suction pipe. In this way, the dust brushed off by the second brush mechanism 51 is covered in the second dust hood 72 and sucked to the outside through the negative pressure dust suction pipe, which can more effectively improve the dust cleaning effect of the electrode strip and prevent the dust from spreading to the outside, thereby realizing a dust-free workshop.

[0064] As an illustration of this embodiment, a driving motor is also provided on the second brush mechanism 52 of this embodiment, and the driving motor is connected to the central axis of the second brush mechanism 52. The second brush mechanism 52 rotates along its central axis driven by the driving motor, thereby improving the dust cleaning efficiency of the second brush and improving the dust cleaning effect.

[0065] As an illustration of this embodiment, it is preferred that the lengths of the first guide rail 211 and the second guide rail 221 on the first transverse position adjustment mechanism 21 and the second transverse position adjustment mechanism 22 are designed to be greater than the width of the wider electrode to be cut, thereby increasing the transverse adjustment range of the cutting mechanism 4 and the brush mechanism of this embodiment, and being suitable for cutting scenarios of electrode strips of different widths.

[0066] As an illustration of this embodiment, the device of this embodiment is provided with a slitting mechanism 4 and a first brush mechanism 51 and a second brush mechanism 52 (and their corresponding first and second dust collecting covers 72 ) matched with the slitting mechanism 4 . However, the invention is not limited thereto.

[0067] The present solution is also applicable to the case where two or more slitting mechanisms 4 are provided on a slitting device. Similarly to the above description, a brush mechanism and a dust hood structure synchronized therewith are provided at the rear end of each slitting mechanism 4 to clean dust from the electrode strips obtained by the slitting mechanism.

[0068] In summary, the solution of this embodiment is not only applicable to the scenario of dividing a wider pole piece into two, but also applicable to the scenario of dividing the wider pole piece into three or more pole piece strips.

[0069] In addition, the device of this embodiment is not only suitable for slitting pole pieces for lithium-ion batteries, but also suitable for slitting other coiled materials.

[0070] The above-mentioned implementation modes do not constitute a limitation on the protection scope of the technical solution. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-mentioned implementation modes shall be included in the protection scope of the technical solution.

Claims

1. A device for cutting pole pieces of lithium-ion batteries, characterized in that: include: Base, The bases are respectively provided with first lateral position adjustment mechanisms extending horizontally along the X-axis, and the first lifting part capable of being lifted and lowered along the Z-axis is installed on the first lateral position adjustment mechanisms. A slitting mechanism and a first brush mechanism are installed at the end of the first lifting part close to the pole piece. The first brush mechanism is located behind the slitting mechanism. The cut pole pieces are transported by the conveyor and move horizontally from front to back along the Y axis. When the first lifting part moves to a predetermined position in a direction close to the pole piece, the slitting knife of the slitting mechanism acts on the surface of the pole piece, and the bristles of the first brush mechanism contact the pole piece. The electrode piece is cut into two electrode piece strips by the cutting knife, and the cutting parts and surfaces of the two electrode piece strips are translated through the first brush mechanism and contact the bristles of the first brush mechanism.

2. The device for cutting pole pieces of lithium-ion batteries according to claim 1, characterized in that: Also includes, The first slider is installed on the first guide rail extending along the X-axis of the first transverse position adjustment mechanism and can be transversely moved along the first guide rail. The first lifting part is installed on the first slider.

3. The device for cutting pole pieces of lithium-ion batteries according to claim 1 or 2, characterized in that: Also includes, The first dust hood is provided with bristles of the first brush mechanism covered in the first dust hood, and the first dust hood is connected with a negative pressure dust collection pipe.

4. The device for cutting pole pieces of lithium-ion batteries according to claim 1 or 2, characterized in that: A first cylinder is also connected to the end of the first lifting part away from the pole piece, and the first cylinder is used to drive the first lifting part to move up and down.

5. The device for cutting pole pieces of lithium-ion batteries according to claim 1 or 2, characterized in that: Also includes, a second lateral position adjustment mechanism, mounted on the base and parallel to the first lateral position adjustment mechanism; A second lifting part, mounted on the second lateral position adjustment mechanism, capable of lifting and lowering along the Z axis; A second brush mechanism is installed at an end of the second lifting part close to the pole piece, and the pole piece moves horizontally between the first brush mechanism and the second brush mechanism. When the second lifting part moves to a predetermined position in a direction close to the pole piece, the cutting parts and surfaces of the two pole piece strips obtained by cutting translate through the second brush mechanism and contact the bristles of the second brush mechanism.

6. The device for cutting pole pieces of lithium-ion batteries according to claim 5, characterized in that: Also includes, The second slider is installed on the guide rail extending along the X-axis of the second transverse position adjustment mechanism and can move transversely along the guide rail. The second lifting part is installed on the second slider.

7. The device for cutting pole pieces of lithium-ion batteries according to claim 6, characterized in that include: The second dust hood covers the bristles of the second brush mechanism, and the second dust hood is connected to the negative pressure dust collection pipeline.

8. The device for cutting pole pieces of lithium-ion batteries according to claim 5, characterized in that: The end of the second lifting part away from the pole piece is also connected to a second cylinder, and the second cylinder is used to drive the second lifting part to move up and down.

9. The device for cutting pole pieces of lithium-ion batteries according to claim 5, characterized in that: The central axes of the first brush mechanism and the second brush mechanism are also connected to motors respectively and rotate under the drive of the motors.

10. The device for cutting pole pieces of lithium-ion batteries according to claim 5, characterized in that: At the rear end of the Y-axis, a plurality of winding devices are provided for winding up the pole piece strips obtained by slitting.

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