Pole piece cutting structure for winding battery cell

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By adopting a tilted design of the main and secondary double cutting knife structure in the cutting process of the lithium-ion battery, problems such as uneven cutting, material dropping and easy cutting knife in the existing technology are solved, and efficient and accurate cutting effect is achieved, improving battery manufacturing efficiency and product quality.

CN222552329UActive Publication Date: 2025-03-04合肥国轩电池技术有限公司

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Patent Information

Application Number: CN202421267397.6
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-04
Publication Date: 2025-03-04
Estimated Expiration: 2034-06-04

AI Technical Summary

Technical Problem

During the cutting process of existing lithium-ion battery electrodes, there are problems such as material dropping, burrs, uneven cutting surfaces and easy damage to the cutting blade, which affects battery quality and production efficiency.

Method used

The main and secondary double cutting tool structure adopts an inclined design. Through the coordination of the tilt blade of the main cutting tool and the anti-collision support angle, combined with the fixed blade surface of the secondary cutting tool, the precise cutting of the pole piece is achieved.

Benefits of technology

It improves the quality and efficiency of the cutting process, avoids material dropout, extends the service life of the cutting tool, reduces maintenance costs, and saves production space.

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Abstract

The utility model discloses a pole piece cutting structure for battery core winding, which comprises a main cutter and an auxiliary cutter, the main cutter comprises a main cutter base body, a cutting edge and anti-collision supporting corners, one end of the main cutter base body is provided with the anti-collision supporting corners which are vertically distributed, one side of the main cutter base body is provided with an inclined cutting edge, and the other side of the main cutter base body is provided with the auxiliary cutter. Wherein the cutting edge and the anti-collision supporting corner are located on the same side; the auxiliary cutter is located below the main cutter and comprises an auxiliary cutter base body and a cutting edge face, and the cutting edge face is arranged on the face, making contact with the cutting edge, of the upper portion of the auxiliary cutter base body. According to the pole piece cutting structure for winding the battery cell, through the inclined cutter structure and the matched action of the main cutter and the auxiliary cutter, accurate control and efficient operation of the pole piece cutting process are achieved, the quality and efficiency of the cutting process are improved through the structural design, the phenomenon of material falling in the pole piece cutting process is effectively avoided, meanwhile, the production space is saved, and the production cost is reduced. And the requirements of modern industrial production are met, and the positive significance is achieved for promoting the development of the battery manufacturing technology.

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Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing, in particular to a pole piece cutting structure for winding a battery core. Background Art

[0002] The development of battery technology plays a vital role in today's society, and lithium-ion batteries, as a high-performance, high-energy-density battery type, are widely used. In the manufacturing process of lithium-ion batteries, the preparation of battery cells is a key step. One of the core components of the battery cell is the pole piece, and its quality and cutting accuracy directly affect the performance and life of the battery. Therefore, the development of an efficient and accurate pole piece cutting technology is crucial to improving battery manufacturing efficiency and product quality.

[0003] At present, from the perspective of battery product safety, the traditional cutting mechanism is prone to material falling and burr problems in the process of cutting lithium-ion battery pole pieces. From the perspective of cutting quality, the traditional cutting mechanism is prone to uneven cutting surface in the process of cutting lithium-ion battery pole pieces, which affects the battery quality. From the perspective of production efficiency, the cutting blade of the traditional cutting mechanism is easily damaged in the process of cutting lithium-ion battery pole pieces, has a short lifespan, and needs to be regularly inspected and replaced, which consumes manpower and material resources. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to provide a high-efficiency and accurate cutting structure for wound pole pieces of a battery cell.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A pole piece cutting structure for winding a battery cell, comprising:

[0007] The main cutter comprises a main cutter base, a blade and an anti-collision support angle, wherein a vertically distributed anti-collision support angle is arranged at one end of the main cutter base, and an inclined blade is arranged on one side of the main cutter base, wherein the blade and the anti-collision support angle are located on the same side;

[0008] The auxiliary cutter is located below the main cutter and comprises an auxiliary cutter base and a blade surface. The blade surface is arranged on the upper side of the auxiliary cutter base that contacts the blade.

[0009] The pole piece cutting structure of the battery cell winding of the present application realizes precise control and efficient operation of the pole piece cutting process through the inclined tool structure and the coordinated action of the main and auxiliary double cutters. This structural design not only improves the quality and efficiency of the cutting process, effectively avoids the phenomenon of pole piece cutting and material falling, but also saves production space, meets the requirements of modern industrial production, and has positive significance for promoting the development of battery manufacturing technology.

[0010] As a further solution of the utility model: the angle between the blade and the horizontal plane is 30°-45°.

[0011] As a further solution of the utility model: the angle between the blade and the horizontal plane is 40°.

[0012] As a further solution of the utility model: the main cutter and the auxiliary cutter are both made of tungsten steel.

[0013] As a further solution of the utility model: a plurality of first positioning holes connected to the cutting machine are opened on the main cutter base.

[0014] As a further solution of the present invention: the first positioning hole is designed as a waist-shaped hole.

[0015] As a further solution of the utility model: a plurality of second positioning holes for connecting to a cutting machine are provided on a side of the auxiliary cutter base body facing away from the main cutter.

[0016] As a further solution of the utility model: the bottom of the anti-collision support angle is overlapped on the top of the auxiliary cutter base.

[0017] As a further solution of the utility model: the distance h between the bottom end of the blade and the anti-collision support corner edge is greater than or equal to the thickness of the auxiliary cutter base.

[0018] As a further solution of the utility model: the main cutter can move horizontally above the auxiliary cutter to achieve cutting.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] Firstly, the pole piece cutting structure of the battery cell winding of the present application realizes precise control and efficient operation of the pole piece cutting process through the inclined design of the tool structure and the coordinated action of the main and auxiliary double cutters. This structural design not only improves the quality and efficiency of the cutting process, and effectively avoids the phenomenon of pole piece cutting and material dropping, but also saves production space, meets the requirements of modern industrial production, and has positive significance for promoting the development of battery manufacturing technology;

[0021] Secondly, the blade of the main cutter of this application has been optimized through continuous field experiments, and the blade angle is designed to be 30-45°. The smaller angle provides faster and finer cutting, which can optimize the cutting effect and reduce the loss of the pole piece material, while ensuring the structural strength of the blade, improving the service life of the equipment and reducing maintenance costs;

[0022] Finally, the auxiliary cutter is fixed and remains motionless, and the main cutter is supported by the anti-collision support angle and performs a translational action on the blade surface of the auxiliary cutter through the cylinder, thereby realizing the cutting of the pole piece. The coordinated action of the two cutters ensures that the cutting force at the moment the cutter contacts the pole piece is sufficient, thereby achieving the accuracy and efficiency of the pole piece cutting process. In order to optimize the cutting process and ensure the accuracy of the cutting position, positioning screw holes are designed for both the main cutter and the auxiliary cutter. Through these positioning holes, the entire cutting mechanism is firmly fixed, ensuring the stability and accuracy of the tool during the cutting process and ensuring the quality of pole piece cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the electrode sheet cutting structure of the battery cell winding according to the embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the main cutter in an embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the auxiliary cutter in the embodiment of the utility model;

[0026] Figure 4 For the utility model embodiment Figure 2 A front view of

[0027] Description of reference numerals:

[0028] 1. Main cutter; 11. Main cutter base; 12. Blade; 13. Anti-collision support angle; 14. First positioning hole;

[0029] 2. Auxiliary cutter; 21. Auxiliary cutter base; 22. Second positioning hole; 23. Blade surface. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Reference Figure 1, a pole piece cutting structure for winding a battery cell, comprising a main cutter 1 and an auxiliary cutter 2, wherein the main cutter 1 and the auxiliary cutter 2 are both installed on a cutting machine for cutting the pole pieces of the battery cell, and the cutting machine is a conventional device in the field of cutting the pole pieces of the battery cell. The present application does not modify the cutting machine, but only installs the cutting mechanism on the cutting machine for use, so the principle and use of the cutting machine are not described in detail; after the main cutter 1 is installed on the cutting machine, it can be driven to translate by a driving mechanism (such as a cylinder, etc., which depends on the actual cutting machine) on the cutting machine; and the auxiliary cutter 2 is also installed on the cutting machine, However, it is located below the main cutter 1 and can contact the main cutter 1, that is, the main cutter 1 is driven by the driving mechanism on the cutting machine to move toward the auxiliary cutter 2. At the same time, when moving, the bottom of the main cutter 1 can contact the top of the auxiliary cutter 2. In the actual electrode cutting process, the auxiliary cutter 2 is fixed and remains motionless. Based on the support of the anti-collision support angle 13, the main cutter 1 moves horizontally above the auxiliary cutter 2 through the driving mechanism, thereby realizing the cutting of the electrode. Through the coordinated action of the two cutters, it is ensured that the cutting force at the moment the cutter contacts the electrode is sufficient, thereby achieving accuracy and efficiency in the electrode cutting process.

[0032] Reference Figure 2 The main cutter 1 is made of tungsten steel to improve the durability and cutting performance of the main cutter 1; the main cutter base 11 is 100-200mm long, 20-50mm wide and 10-20mm thick, and its specific size depends on the actual situation on site or the needs of the user. This application only gives one implementation method and does not limit it; the main cutter 1 includes a main cutter base 11, a blade 12, an anti-collision support angle 13 and a first positioning hole 14, wherein one end of the main cutter base 11 is provided with a vertically distributed anti-collision support angle 13, and an inclined blade 12 is provided on one side of the main cutter base 11, wherein the blade 12 and the anti-collision support angle 13 are located on the same side.

[0033] Furthermore, the anti-collision support angle 13 structure has a length of 10-20 mm, a width of 30-50 mm, and a thickness of 10-20 mm. Its specific size is determined according to the actual situation on site or the needs of the user. This application only provides one implementation method and does not limit it. The lower surface of the anti-collision support angle 13 is placed on the auxiliary cutter 2 to provide sufficient support for the main cutter base to protect it from damage and prevent the screws from loosening or position shifting, thereby maintaining cutting accuracy.

[0034] Reference Figure 4 The main cutting blade 12 has been optimized through continuous field experiments, and the blade angle is designed to be 30°-45°, preferably 40°. The smaller angle can provide faster and finer cutting, optimize the cutting effect and reduce the loss of the pole piece material. At the same time, it ensures the structural strength of the blade, improves the service life of the equipment, and reduces maintenance costs.

[0035] Furthermore, a plurality of first positioning holes 14 are designed on the main cutter base 11. The first positioning holes 14 are threaded holes. Through these positioning holes, the main cutter 1 can be fixed to the cutting machine using bolts and screws, and the main cutter 1 is firmly fixed, thereby ensuring the stability and accuracy of the tool during the cutting process, preventing it from loosening during the cutting process, and ensuring the quality of the electrode cutting.

[0036] Furthermore, the number of the first positioning holes 14 is determined according to actual needs and is not limited in the present application. The first positioning holes 14 of the present application are designed in a waist-shaped hole shape. The waist-shaped hole design allows the main cutter base 11 to be fine-tuned when installed on the cutting machine. The fine-tuning here can be achieved according to the position of the main cutter base 11 relative to the auxiliary cutter 2, thereby improving the installation accuracy of the main cutter base 11.

[0037] Reference Figure 3 The auxiliary cutter 2 is made of tungsten steel to improve the durability and cutting performance of the auxiliary cutter 2. The auxiliary cutter base 21 is 100-200mm long, 20-50mm wide, and 10-20mm thick. Its specific size depends on the actual situation on site or the needs of the user. This application only gives one implementation method and does not limit it. The auxiliary cutter 2 includes an auxiliary cutter base 21, a second positioning hole 22 and a blade surface 23, wherein the blade surface 23 is arranged on the upper side of the auxiliary cutter base 21 that contacts the blade 12, and the bottom of the anti-collision support angle 13 overlaps the top of the auxiliary cutter base 21.

[0038] It should be noted that the distance h between the bottom end of the blade 12 and the edge of the anti-collision support angle 13 is greater than or equal to the thickness of the auxiliary cutter base 21. This design allows the anti-collision support angle 13 to be located above the auxiliary cutter base 21 at any time when the blade 12 translates, providing sufficient support to protect it from damage and preventing the screws from loosening or shifting, thereby maintaining cutting accuracy.

[0039] Furthermore, a plurality of second positioning holes 22 for connecting to the cutting machine are provided on the side of the auxiliary cutter base 21 facing away from the main cutter 1. Through these positioning holes, the auxiliary cutter 2 can be fixed to the cutting machine using bolts and screws, and the auxiliary cutter 2 is firmly fixed, thereby ensuring the stability and accuracy of the tool during the cutting process, preventing it from loosening during the cutting process, and ensuring the quality of the electrode cutting. The number of the second positioning holes 22 is determined according to actual needs and is not limited in this application. At the same time, the second positioning holes 22 can be circular holes or waist-shaped holes. The waist-shaped hole design allows the auxiliary cutter 2 to be fine-tuned when installed on the cutting machine, thereby improving the installation accuracy of the auxiliary cutter 2.

[0040] The specific operating principles of this application are as follows:

[0041] Before cutting, the main cutter 1 is first fixed to the corresponding position of the cutting machine through the first positioning hole 14, and the auxiliary cutter 2 is fixed to the corresponding position of the cutting machine through the second positioning hole 22; then in the actual electrode cutting process, the electrode is placed between the main cutter 1 and the auxiliary cutter 2, the auxiliary cutter 2 is fixed and remains motionless, and the main cutter 1 is supported by the anti-collision support angle 13 and moves horizontally on the auxiliary cutter blade surface 23 through the cylinder, thereby realizing the cutting of the electrode; through the coordinated action of the two cutters, it is ensured that the cutting force at the moment the cutter contacts the electrode is sufficient, so as to achieve the accuracy and efficiency of the electrode cutting process.

[0042] In summary, the electrode cutting structure of the battery cell winding realizes precise control and efficient operation of the electrode cutting process through the carefully designed tool structure and coordinated action. This structural design not only improves the quality and efficiency of the cutting process, but also effectively avoids the phenomenon of electrode cutting and dropping. At the same time, it also saves production space, meets the requirements of modern industrial production, and has positive significance for promoting the development of battery manufacturing technology.

[0043] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pole piece cutting structure for winding a battery cell, characterized in that: include: A main cutter (1) comprises a main cutter base (11), a blade (12) and an anti-collision support angle (13), wherein one end of the main cutter base (11) is provided with a vertically distributed anti-collision support angle (13), and an inclined blade (12) is provided on one side of the main cutter base (11), wherein the blade (12) and the anti-collision support angle (13) are located on the same side; The auxiliary cutter (2) is located below the main cutter (1) and comprises an auxiliary cutter base (21) and a blade surface (23). The blade surface (23) is arranged on the upper side of the auxiliary cutter base (21) that contacts the blade (12).

2. The electrode sheet cutting structure for winding a battery cell according to claim 1, characterized in that: The angle between the blade (12) and the horizontal plane is 30°-45°.

3. The electrode sheet cutting structure for winding a battery cell according to claim 2, characterized in that: The angle between the blade (12) and the horizontal plane is 40°.

4. The electrode sheet cutting structure for winding a battery cell according to claim 1, characterized in that: The main cutting knife (1) and the auxiliary cutting knife (2) are both made of tungsten steel.

5. The electrode sheet cutting structure for winding a battery cell according to claim 1, characterized in that: A plurality of first positioning holes (14) connected to the cutting machine are provided on the upper side of the main cutting blade base (11).

6. The electrode sheet cutting structure for winding a battery cell according to claim 5, characterized in that: The first positioning hole (14) is designed as a waist-shaped hole.

7. The electrode sheet cutting structure for winding a battery cell according to claim 1, characterized in that: A plurality of second positioning holes (22) for connecting to a cutting machine are provided on a side of the auxiliary cutter base (21) facing away from the main cutter (1).

8. The electrode sheet cutting structure for winding a battery cell according to claim 1, characterized in that: The bottom of the anti-collision support angle (13) overlaps the top of the auxiliary cutter base (21).

9. The electrode sheet cutting structure for winding a battery cell according to claim 8, characterized in that: The distance h between the bottom end of the blade (12) and the edge of the anti-collision support angle (13) is greater than or equal to the thickness of the auxiliary cutter base (21).

10. The electrode sheet cutting structure for winding a battery cell according to claim 1, characterized in that: The main cutter (1) can move horizontally above the auxiliary cutter (2) to achieve cutting.