Lithium battery pole piece slitting device

Abstract

The utility model relates to a lithium battery pole piece slitting device. The lithium battery pole piece slitting device comprises a rack, wherein a first deviation rectifying device, a primary cutter assembly, a primary adjusting roller, a second deviation rectifying device, a third deviation rectifying device, a secondary cutter assembly and a winding device are arranged on the rack along a transmission path of a pole piece; the lithium battery pole piece slitting device is configured in the mode that a pole piece is slit into a plurality of wide material belts by the primary cutter assembly after passing through the first deviation rectifying device, and the wide material belts are divided into a first conveying branch and a second conveying branch through the primary adjusting roller to be conveyed. The wide-width material belt of the first conveying branch passes through the second deviation rectifying device, the wide-width material belt of the second conveying branch passes through the third deviation rectifying device, and the wide-width material belts of the first conveying branch and the second conveying branch are converged into the secondary cutter assembly. According to the scheme provided by the invention, the equipment cost can be reduced, and the equipment layout is more compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery manufacturing, and particularly relates to a lithium battery pole piece slitting device. BACKGROUND

[0002] In the production and manufacturing process of lithium batteries, pole piece slitting is a key process for ensuring the size accuracy of battery cells. In the related art, for slitting of multiple wide-width pole pieces, a secondary slitting process is usually used to ensure slitting accuracy, that is, the pole piece base material is first subjected to primary slitting by a primary cutter assembly to form multiple wide-width material strips, and the multiple wide-width material strips are transmitted in two conveying paths, and then the material strips on each conveying path are subjected to secondary slitting respectively, and finally pole piece finished products with a width are obtained.

[0003] However, the slitting method in the related art described above requires two sets of independent secondary cutter assemblies for secondary slitting, which increases the equipment cost and requires a larger installation space for the equipment. CONTENT OF THE UTILITY MODEL

[0004] To solve or partially solve the problems in the related art, the present application provides a lithium battery pole piece slitting device which can reduce equipment cost and make the equipment layout more compact.

[0005] The present application provides a lithium battery pole piece slitting device, comprising: a rack, a first deviation rectifying device, a primary cutter assembly, a primary adjusting roller, a second deviation rectifying device, a third deviation rectifying device, a secondary cutter assembly and a winding device are arranged on the rack along the transmission path of the pole piece.

[0006] The lithium battery pole piece slitting device is configured such that the pole piece is cut into several wide-width material strips by the primary cutter assembly after passing through the first deviation rectifying device, the primary adjusting roller divides the several wide-width material strips into a first transmission branch and a second transmission branch for conveying, the wide-width material strips of the first transmission branch pass through the second deviation rectifying device, the wide-width material strips of the second transmission branch pass through the third deviation rectifying device, and the wide-width material strips of the first transmission branch and the second transmission branch are fed to the secondary cutter assembly and then to the winding device.

[0007] Further, the primary adjusting roller has two, and the several wide-width material strips passing through the primary cutter assembly are divided into the first transmission branch and the second transmission branch for conveying by the two primary adjusting rollers.

[0008] Further, the lithium battery pole piece slitting device described above further comprises: a first CCD detection device and a second CCD detection device, the first CCD detection device is located between the second deviation rectifying device and the primary adjusting roller, and the second CCD detection device is located between the third deviation rectifying device and the primary adjusting roller.

[0009] Furthermore, the aforementioned lithium battery electrode slitting device also includes two secondary adjustment rollers. The winding device has two winding devices. The electrode sheets after passing through the secondary cutter assembly are divided into a first winding branch and a second winding branch by the two secondary adjustment rollers and then wound up by the two winding devices.

[0010] Furthermore, the aforementioned lithium battery electrode slitting device also includes a third CCD detection device and a fourth CCD detection device, wherein the third CCD detection device is used to detect the first winding branch, and the fourth CCD detection device is used to detect the second winding branch.

[0011] Furthermore, the first take-up branch and the second take-up branch are arranged vertically opposite each other.

[0012] Furthermore, the aforementioned lithium battery electrode slitting device further includes: a first tension adjusting swing roller and a second tension adjusting swing roller, wherein the first tension adjusting swing roller is located on the first transmission branch and is located between the second correction device and the secondary cutter assembly, the second tension adjusting swing roller is located on the second transmission branch and is located between the third correction device and the secondary cutter assembly.

[0013] Furthermore, the aforementioned lithium battery electrode slitting device also includes a converging roller, which is located between the first transmission branch and the second transmission branch and the secondary cutter assembly.

[0014] Furthermore, the first transmission branch and the second transmission branch are arranged vertically opposite each other.

[0015] Furthermore, the aforementioned lithium battery electrode slitting device also includes several transfer rollers disposed on the transfer path of the electrode.

[0016] The technical solution provided in this application can include the following beneficial effects: The wide strip material after initial slitting is divided into a first transmission branch and a second transmission branch by a primary adjusting roller, and the strip material of both branches is slitted a second time using the same set of secondary cutting blades. This replaces the traditional design of two independent secondary cutting blades, reducing the number of equipment components and effectively lowering equipment manufacturing and maintenance costs. The shared secondary cutting blade design significantly reduces the space occupied by the equipment, avoiding layout redundancy caused by the side-by-side installation of multiple slitting components, making the equipment structure more compact. The second and third correction devices can separate and stagger adjacent wide strip materials, preventing edge friction and breakage of adjacent strip materials after they merge into the secondary cutting blades.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0019] Figure 1 This is a schematic diagram of the structure of a lithium battery electrode cutting device shown in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of the structure of the electrode sheet before it passes through the cutting assembly;

[0021] Figure 3 This is a schematic diagram of the structure of the electrode sheet before it passes through the secondary cutting assembly.

[0022] Figure label:

[0023] 1-Frame, 2-First web guiding device, 3-First cutting assembly, 4-First adjusting roller, 5-Second web guiding device, 6-Third web guiding device, 7-Secondary cutting assembly, 8-Rewinding device, 9-First CCD detection device, 10-Secondary CCD detection device, 11-Secondary adjusting roller, 12-Third CCD detection device, 13-Fourth CCD detection device, 14-First tension adjusting swing roller, 15-Second tension adjusting swing roller, 16-Converging roller, 17-Transfer roller, 20-Electrode sheet, 21-First transmission branch, 22-Second transmission branch, 23-First winding branch, 24-Second winding branch. Detailed Implementation

[0024] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0025] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 As shown, this application provides a lithium battery electrode slitting device, including a frame 1. The frame 1 is provided with a first correction device 2, a primary cutter assembly 3, a primary adjusting roller 4, a second correction device 5, a third correction device 6, a secondary cutter assembly 7, and a winding device 8 along the transmission path of the electrode 20.

[0030] The lithium battery electrode slitting device is configured such that: after passing through the first correction device 2, the electrode 20 is slitted into several wide strips by the primary cutter assembly 3; the primary adjustment roller 4 divides the several wide strips into a first transmission branch 21 and a second transmission branch 22 for conveying; the wide strips of the first transmission branch 21 pass through the second correction device 5; the wide strips of the second transmission branch 22 pass through the third correction device 6; the wide strips of the first transmission branch 21 and the second transmission branch 22 merge into the secondary cutter assembly 7; and after passing through the secondary cutter assembly 7, they are conveyed to the winding device 8.

[0031] Based on the above scheme, the electrode 20 is cut into several wide strips by the primary cutter assembly 3 after passing through the first correction device 2. The primary adjustment roller 4 divides the wide strips into the first transmission branch 21 and the second transmission branch 22 for conveying. The wide strips of the first transmission branch 21 pass through the second correction device 5, and the wide strips of the second transmission branch 22 pass through the third correction device 6. The second correction device 5 and the third correction device 6 can separate and stagger adjacent wide strips to avoid friction and edge breakage of adjacent strips after they merge into the secondary cutter assembly 7. After being cut by the secondary cutter assembly 7, the electrode 20 is conveyed to the winding device 8. Therefore, the above scheme can meet the cutting requirements with one set of secondary cutter assembly 7, thereby reducing equipment costs and making the equipment layout more compact.

[0032] Figure 2 This diagram shows the structure of the electrode 20 before it passes through the cutting assembly 3. In some embodiments, such as... Figure 2 As shown, the electrode 20 is a single sheet structure before passing through the primary cutter assembly 3. The dashed line in the diagram represents the cutting path of the primary cutter assembly 3 on the electrode 20. That is, the primary cutter assembly 3 cuts the electrode 20 into four wide strips. Two of the wide strips are transported on the first transmission branch 21, and the other two wide strips are transported on the second transmission branch 22. The second correction device 5 and the third correction device 6 will correct and adjust the misalignment of the corresponding wide strips so that the positions of the four wide strips when they converge are as shown. Figure 3 As shown. Please refer to [the original text]. Figure 3 Before entering the secondary cutter assembly 7, there is a certain gap between two adjacent wide strips to avoid edge friction and breakage of adjacent strips after they merge into the secondary cutter assembly 7. Figure 3 As shown in the figure, the dotted line represents the cutting path of the secondary cutter assembly 7, that is, the secondary cutter assembly 7 cuts the four wide strips into eight electrode sheets.

[0033] In some embodiments, such as Figure 1 As shown, there are two primary regulating rollers 4. Several wide strips of material that have passed through the primary cutting assembly 3 are divided into a first transmission branch 21 and a second transmission branch 22 by the two primary regulating rollers 4 for conveying. Specifically, for example, two of the wide strips are conveyed upward along the first transmission branch 21 by one of the primary regulating rollers 4, and the other two wide strips are conveyed downward along the second transmission branch 22 by the other primary regulating roller 4.

[0034] In some embodiments, such as Figure 1 As shown, the lithium battery electrode slitting device also includes a first CCD detection device 9 and a second CCD detection device 10. The first CCD detection device 9 is located between the second correction device 5 and the primary adjustment roller 4, and the second CCD detection device 10 is located between the third correction device 6 and the primary adjustment roller 4.

[0035] Specifically, both the first CCD detection device 9 and the second CCD detection device 10 are line scan detectors used to detect the width of the material strip. The first CCD detection device 9 and the second correction device 5 form a real-time width detection and correction closed-loop control, and the second CCD detection device 10 and the third correction device 6 form a real-time width detection and correction closed-loop control. The CCD detection devices and correction devices not only serve as a cutting and correction closed-loop mechanism, but also ensure that adjacent material strips are staggered and arranged to avoid edge friction and breakage of adjacent material strips after merging.

[0036] In some embodiments, such as Figure 1 As shown, the lithium battery electrode slitting device also includes two secondary adjusting rollers 11, and two winding devices 8. The electrode sheets after passing through the secondary cutter assembly 7 are divided into a first winding branch 23 and a second winding branch 24 by the two secondary adjusting rollers 11 and are then wound up by the two winding devices 8. Specifically, after passing through the secondary cutter assembly 7, for example, four electrode sheets are wound upwards along the first winding branch 23 by one of the secondary adjusting rollers 11, and the other four electrode sheets are wound downwards along the second winding branch 24 by the other secondary adjusting roller 11.

[0037] In some embodiments, such as Figure 1 As shown, the lithium battery electrode slitting device also includes a third CCD detection device 12 and a fourth CCD detection device 13. The third CCD detection device 12 is used to detect the first winding branch 23, and the fourth CCD detection device 13 is used to detect the second winding branch 24. Specifically, both the third CCD detection device 12 and the fourth CCD detection device 13 are line scan detectors used to detect the width of the electrode sheet after passing through the secondary cutter assembly 7.

[0038] In some embodiments, such as Figure 1 As shown, the first winding branch 23 and the second winding branch 24 are arranged vertically opposite each other, and the two winding devices 8 are also arranged vertically opposite each other.

[0039] In some embodiments, such as Figure 1 As shown, the lithium battery electrode slitting device further includes a first tension adjusting roller 14 and a second tension adjusting roller 15. The first tension adjusting roller 14 is located on the first transmission branch 21 and between the second correction device 5 and the secondary cutter assembly 7. The second tension adjusting roller 15 is located on the second transmission branch 22 and between the third correction device 6 and the secondary cutter assembly 7. The first tension adjusting roller 14 and the second tension adjusting roller 15 are used to ensure the tension stability of the first transmission branch 21 and the second transmission branch 22.

[0040] In some embodiments, such as Figure 1As shown, the lithium battery electrode slitting device also includes a converging roller 16, which is located between the first transmission branch 21, the second transmission branch 22, and the secondary cutter assembly 7. The wide strips from the first transmission branch 21 and the second transmission branch 22 converge at the converging roller 16 and are then synchronously transmitted to the secondary cutter assembly 7.

[0041] In some embodiments, such as Figure 1 As shown, the first transmission branch 21 and the second transmission branch 22 are arranged vertically opposite each other.

[0042] In some embodiments, such as Figure 1 As shown, the lithium battery electrode cutting device also includes several transmission rollers 17 disposed on the transmission path of the electrode 20. The transmission rollers 17 are rotatably connected to the frame 1 to guide the transmission of the electrode 20.

[0043] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs.

[0044] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A lithium battery electrode cutting device, characterized in that, include: The frame is provided with a first correction device, a primary cutter assembly, a primary adjusting roller, a second correction device, a third correction device, a secondary cutter assembly, and a winding device along the transmission path of the electrode sheet. The lithium battery electrode slitting device is configured such that: after passing through the first correction device, the electrode is slitted into several wide strips by the primary cutter assembly; the primary adjusting roller divides the several wide strips into a first transmission branch and a second transmission branch for conveying; the wide strips of the first transmission branch pass through the second correction device; the wide strips of the second transmission branch pass through the third correction device; the wide strips of the first transmission branch and the second transmission branch merge into the secondary cutter assembly; and after passing through the secondary cutter assembly, they are conveyed to the winding device.

2. The lithium battery electrode slitting device according to claim 1, characterized in that: The primary adjustment roller has two sections. Several wide strips of material passing through the primary cutter assembly are divided into the first transmission branch and the second transmission branch by the two primary adjustment rollers for conveying.

3. The lithium battery electrode slitting device according to claim 1, characterized in that, Also includes: A first CCD detection device and a second CCD detection device are located between the second correction device and the primary adjustment roller, and the second CCD detection device is located between the third correction device and the primary adjustment roller.

4. The lithium battery electrode slitting device according to claim 1, characterized in that, Also includes: The electrode sheet, after passing through the secondary cutter assembly, is divided into a first winding branch and a second winding branch by the two secondary adjustment rollers and then wound up by the two winding devices.

5. The lithium battery electrode slitting device according to claim 4, characterized in that, Also includes: A third CCD detection device and a fourth CCD detection device, wherein the third CCD detection device is used to detect the first take-up branch and the fourth CCD detection device is used to detect the second take-up branch.

6. The lithium battery electrode slitting device according to claim 4, characterized in that: The first take-up branch and the second take-up branch are arranged vertically opposite each other.

7. The lithium battery electrode slitting device according to claim 1, characterized in that, Also includes: A first tension adjusting swing roller and a second tension adjusting swing roller, wherein the first tension adjusting swing roller is located on the first transmission branch and is located between the second correction device and the secondary cutter assembly, and the second tension adjusting swing roller is located on the second transmission branch and is located between the third correction device and the secondary cutter assembly.

8. The lithium battery electrode slitting device according to claim 7, characterized in that, Also includes: A converging roller is located between the first transmission branch and the second transmission branch and the secondary cutter assembly.

9. The lithium battery electrode slitting device according to claim 1, characterized in that: The first transmission branch and the second transmission branch are arranged vertically relative to each other.

10. The lithium battery electrode slitting device according to claim 1, characterized in that, Also includes: Several transmission rollers are installed on the transmission path of the electrode sheet.

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