Pole piece cutting mechanism and automatic roll changing equipment for lithium battery coating

Abstract

The utility model belongs to the field of lithium batteries, and particularly provides a pole piece cutting mechanism which comprises a support body. The driving mechanism is arranged on the bracket body; the middle of a cutting edge of the cutter protrudes out of the two ends of the cutting edge, and the cutter is arranged at the telescopic end of the driving mechanism and driven by the driving mechanism to ascend and descend. By the adoption of the cutter with the high middle and the two low sides, the pressure in contact with the pole piece can be effectively reduced, the belt breakage phenomenon caused by too large pressure is avoided, it is guaranteed that the pole piece cannot be broken after roll replacement every time, and belt breakage during coating is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and particularly relates to a pole piece cutting mechanism and automatic roll-changing equipment for lithium battery coating. Background Art

[0002] Coating is a critical process in lithium battery manufacturing, ensuring a uniform coating of the positive or negative electrode material onto the current collector to enhance battery performance. However, automated roll-changing during the coating process is challenging, as it must be completed quickly and accurately. Failure to do so can result in tape breakage, impacting battery quality and production efficiency.

[0003] In the related art, the success rate of reel changing is improved by improving the reel changing equipment and optimizing the reel changing process. However, the cutter design often cannot effectively reduce the contact electrode pressure, which may lead to tape breakage during the reel changing process.

[0004] Therefore, how to reduce the probability of coating tape breakage after roll change is a technical problem that needs to be solved urgently.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Utility Model Content

[0006] The embodiments of the present disclosure at least provide a pole piece cutting mechanism and an automatic roll-changing device for lithium battery coating.

[0007] In a first aspect, an embodiment of the present disclosure provides a pole piece cutting mechanism, comprising:

[0008] a stent body; and;

[0009] a driving mechanism, which is disposed on the support body; and

[0010] The cutter has a cutting edge whose middle portion is convex from both ends of the cutting edge, and the cutter is arranged at the telescopic end of the driving mechanism and is driven to rise and fall by the driving mechanism.

[0011] In an optional embodiment, the cutting edge of the cutter is arc-shaped, and the curvature of the cutting edge of the cutter is in the range of 1-3°.

[0012] In an optional embodiment, the difference between the height of the two ends of the cutting edge and the height of the middle part of the cutting edge is between 3-10 mm.

[0013] In an optional embodiment, the cutting edge of the cutter consists of N teeth, where N is greater than 2.

[0014] In an optional embodiment, the width of the saw teeth is between 1-10 cm.

[0015] In an optional embodiment, reinforcement plates are respectively provided on both sides of the cutter.

[0016] In an optional embodiment, fixing holes are provided at positions corresponding to the reinforcing plate and the cutter;

[0017] The two reinforcing plates are fixedly connected to both sides of the cutter through screws and corresponding fixing holes.

[0018] In an optional embodiment, the driving mechanism is a cylinder;

[0019] The cylinder is fixedly arranged on the lower surface of the bracket body;

[0020] The cutter is fixedly arranged on the piston rod of the cylinder.

[0021] In an optional embodiment, the number of the cylinders is 2;

[0022] The two cylinders are respectively arranged at two ends of the cutter.

[0023] In a second aspect, this embodiment further provides a lithium battery coating automatic roll-changing device, comprising:

[0024] The roll changing device body and the cutting mechanism as described above;

[0025] The coil changing device body is suitable for conveying the pole pieces;

[0026] The cutting mechanism is suitable for cutting the pole pieces.

[0027] The beneficial effect of the present invention is that the electrode cutting mechanism and the automatic reel changing equipment for lithium battery coating can effectively reduce the contact pressure of the electrode by adopting a cutter that is high in the middle and low on both sides, avoiding the phenomenon of tape breakage caused by excessive pressure, thereby ensuring that the electrode will not break after each reel change, thereby avoiding coating tape breakage.

[0028] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of the pole piece cutting mechanism provided in an embodiment of the present disclosure.

[0032] In the figure: 100, bracket body; 200, cutter; 210, cutting edge; 220, reinforcing plate; 230, fixing hole; 300, driving mechanism. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0034] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0035] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0036] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, in the drawings, the thickness or curvature of components may be exaggerated or reduced in order to effectively describe the technical content.

[0037] See also Figure 1, Figure 1 The schematic diagram of the electrode cutting mechanism is shown. The electrode cutting mechanism includes: a support body 100, a cutter 200, and a drive mechanism 300. The drive mechanism 300 is fixed to the support body 100. The cutter 200 is fixed to the telescopic end of the drive mechanism 300 and is adapted to be raised and lowered by the drive mechanism 300. The cutting edge 210 of the cutter 200 has a central portion that protrudes from both ends of the cutting edge 210. By using a cutter 200 with a higher center and lower edges, the contact pressure on the electrode can be effectively reduced, preventing tape breakage caused by excessive pressure. This ensures that the electrode will not break after each reel change, thus avoiding tape breakage during coating.

[0038] The middle portion of the cutting edge 210 of the cutter 200 is more convex than the two ends of the cutting edge 210 , that is, the distance between the middle portion of the cutting edge 210 of the cutter 200 and the pole piece is smaller than the distance between the two ends of the cutting edge 210 and the pole piece.

[0039] In a preferred embodiment, the cutting edge 210 of the cutter 200 is curved, and the curvature of the cutting edge 210 of the cutter 200 ranges from 1 to 3 degrees. The curved cutting edge 210 design allows the cutting edges 210 to be symmetrically arranged, so that when the cutter 200 contacts the electrode, the middle portion contacts the electrode first, then the sides, thereby reducing contact pressure and the possibility of tape breakage.

[0040] In a preferred embodiment, the difference between the height of the two ends of the cutting edge 210 of the cutter 200 and the height of the middle portion of the cutting edge 210 is between 3-10 mm. Figure 1 The distance between the two dotted lines in FIG. 2 is 3-10 mm, and the difference between the heights of the two ends of the cutting edge 210 of the cutter 200 and the height of the middle portion of the cutting edge 210 is set according to the size of the cutter 200 .

[0041] In some embodiments, the cutting edge 210 of the cutter 200 is composed of N serrations, where N is greater than 2. The use of the serrated cutter 200 can effectively reduce the pressure on the contact electrode and avoid the phenomenon of tape breakage caused by excessive pressure.

[0042] In some embodiments, the width of the saw teeth is between 1-10 cm.

[0043] In some embodiments, reinforcement plates 220 are provided on both sides of the cutter 200. The reinforcement plates 220 are provided to support the cutter 200 so that the cutter 200 will not deform during the cutting process, thereby ensuring the cutting effect.

[0044] In a preferred embodiment, fixing holes 230 are provided at corresponding positions of the reinforcing plates 220 and the cutter 200 ; the two reinforcing plates 220 are fixedly connected to both sides of the cutter 200 via screws and corresponding fixing holes 230 .

[0045] In some embodiments, the drive mechanism 300 is a pneumatic cylinder fixedly mounted on the lower surface of the support body 100. The cutter 200 is fixedly mounted on the piston rod of the pneumatic cylinder. When the electrode needs to be cut, the pneumatic cylinder is pressed downward instantly, enabling the cutter 200 to complete the cutting action quickly, thereby reducing dust generation.

[0046] In order to ensure that the cutter 200 is evenly stressed and thus prevent the pole piece from breaking, in a preferred embodiment, the number of the cylinders is two; the two cylinders are respectively arranged at both ends of the cutter 200 .

[0047] This embodiment also provides an automatic reel-changing device for lithium battery coating, comprising: a reel-changing device body and a cutting mechanism as described above; the reel-changing device body is suitable for conveying electrode sheets; and the cutting mechanism is suitable for cutting the electrode sheets. By using a cutter 200 with a high center and low sides, the pressure on the electrode sheets can be effectively reduced, preventing the tape from breaking due to excessive pressure. This ensures that the electrode sheets will not break after each reel change, thus avoiding tape breakage during coating.

[0048] In summary, the present invention provides a pole piece cutting mechanism, comprising: a support body 100, a cutter 200, and a drive mechanism 300; the drive mechanism 300 is fixedly mounted on the support body 100; the cutter 200 is fixedly mounted at the telescopic end of the drive mechanism 300 and is adapted to be raised and lowered under the drive of the drive mechanism 300; the cutting edge 210 of the cutter 200 has a lower height in the middle than at both ends. By employing a cutter 200 that is higher in the middle and lower at both ends, the contact pressure on the pole piece can be effectively reduced, avoiding tape breakage caused by excessive pressure, thereby ensuring that the pole piece will not break after each roll change, thereby avoiding tape breakage during coating.

[0049] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A pole piece cutting mechanism, characterized in that: include: bracket body; a driving mechanism, which is arranged on the support body; as well as The cutter has a cutting edge whose middle portion is convex from both ends of the cutting edge, and the cutter is arranged at the telescopic end of the driving mechanism and is driven to rise and fall by the driving mechanism.

2. The electrode cutting mechanism according to claim 1, characterized in that: The cutting edge of the cutter is arc-shaped, and the curvature range of the cutting edge of the cutter is between 1-3 degrees.

3. The electrode cutting mechanism according to claim 1, wherein: The difference between the height of the two ends of the cutting edge of the cutter and the height of the middle part of the cutting edge is between 3-10 mm.

4. The electrode cutting mechanism according to claim 1, wherein: The cutting edge of the cutter consists of N teeth, wherein N is greater than 2.

5. The electrode cutting mechanism according to claim 4, characterized in that: The width of the saw teeth is between 1-10 cm.

6. The electrode cutting mechanism according to claim 1, wherein: Reinforcement plates are respectively provided on both sides of the cutter.

7. The electrode cutting mechanism according to claim 6, characterized in that: The reinforcing plate and the cutter are both provided with fixing holes at positions corresponding to each other; The two reinforcing plates are fixedly connected to both sides of the cutter through screws and corresponding fixing holes.

8. The electrode cutting mechanism according to claim 1, wherein: The driving mechanism is a cylinder; The cylinder is fixedly arranged on the lower surface of the bracket body; The cutter is fixedly arranged on the piston rod of the cylinder.

9. The pole piece cutting mechanism according to claim 8, characterized in that: The number of cylinders is 2; The two cylinders are respectively arranged at two ends of the cutter.

10. A lithium battery coating automatic roll changing device, characterized in that: include: The roll changing device body and the cutting mechanism according to any one of claims 1 to 9; wherein, The coil changing device body is suitable for conveying the pole pieces; The cutting mechanism is suitable for cutting the pole pieces.

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