An electrode slitting mechanism

Abstract

This application relates to an electrode slitting mechanism, specifically in the field of electrode slitting technology. It includes a base with two parallel bearing seats. An upper cutter shaft and a lower cutter shaft are rotatably connected between the two bearing seats. The upper and lower cutter shafts are parallel to each other. An upper spacer is fitted around the periphery of the upper cutter shaft, and an upper slitting blade is mounted on the upper spacer. Two lower spacers are fitted around the periphery of the lower cutter shaft, with a lower slitting blade mounted at one end of each lower spacer that is close to each other. The cutting edge of the upper slitting blade is adjustablely positioned between the cutting edges of the two lower slitting blades. This application improves the service life of the slitting blades and ensures smooth slitting of the electrode.

Description

Technical Field

[0001] This application relates to the field of electrode slitting technology, and in particular to an electrode slitting mechanism. Background Technology

[0002] Electrodes are key components in the residual chemical reactions within a battery. They are typically composed of active materials, conductive agents, binders, and current collectors, playing a crucial role in the battery's charging and discharging process. In the production of lithium-ion batteries, a pre-slitting process is performed on the electrodes to cut them into multiple strips along their width.

[0003] Currently commonly used slitting mechanisms such as Figure 1 and Figure 2 As shown, one motor controls the rotation of the upper cutter shaft and the upper cutter, while the other motor controls the rotation of the lower cutter shaft and the lower cutter. The electrode is placed between the upper and lower cutters, and under the shearing action of the upper and lower cutters, the electrode is continuously sheared. Figure 1 The design shown is a double-edged blade, meaning it has two lower slitting blades and one upper slitting blade. Figure 2 The diagram shows a single-blade structure, which consists of only one upper slitting blade and one lower slitting blade. The blade clearance between the upper and lower slitting blades is very small. However, the single-blade structure produces a poor cross-section quality and the blade wears out quickly, resulting in a short blade life. The double-blade structure, on the other hand, is prone to electrode breakage, so improvements are needed. Utility Model Content

[0004] In order to improve the service life of the slitting tool and ensure that the electrode sheets can be slitting smoothly, this application provides an electrode sheet slitting mechanism.

[0005] The electrode slitting mechanism provided in this application adopts the following technical solution:

[0006] An electrode slitting mechanism includes a base with two parallel bearing seats. An upper cutter shaft and a lower cutter shaft are rotatably connected between the two bearing seats. The upper cutter shaft and the lower cutter shaft are arranged in parallel. An upper spacer is sleeved on the periphery of the upper cutter shaft, and an upper slitting blade is arranged on the upper spacer. Two lower spacers are sleeved on the periphery of the lower cutter shaft, and a lower slitting blade is arranged at one end of each of the two lower spacers that are close to each other. The blade of the upper slitting blade is adjustablely positioned between the blades of the two lower slitting blades.

[0007] By adopting the above technical solution, the electrode passes between the upper and lower cutting shafts and is cut by the upper and lower cutting blades. Based on the state of the electrode, the distance between the upper cutting blade and the lower cutting blades on both sides can be adjusted to achieve the switching between single-blade and double-blade structures, thereby improving the cutting effect.

[0008] Preferably, a washer is provided between the two lower cutting blades, and the washer abuts against the end faces of the two lower cutting blades.

[0009] By adopting the above technical solution, the spacer can maintain a stable distance between the two lower cutting blades.

[0010] Preferably, the upper spacer includes two outer sleeves, a first central sleeve and a second central sleeve disposed between the two outer sleeves, an air-expanding sleeve is disposed between one outer sleeve and the first central sleeve, and a butterfly spring is disposed between the other outer sleeve and the second central sleeve. The first central sleeve and the second central sleeve are both slidably connected to the upper cutter shaft, and a gap is preset between the first central sleeve and the second central sleeve for the installation of the upper slitting blade.

[0011] By adopting the above technical solution, under the thrust of the air expansion sleeve, the first and second center sleeves overcome the elastic force of the disc spring, thereby ensuring precise adjustment of the upper slitting blade.

[0012] Preferably, a tension spring is provided in the gap, and the tension spring abuts between the end face of the upper slitting blade and the end face of the second center sleeve.

[0013] By adopting the above technical solution, setting a tension spring can effectively improve the adjustment accuracy of the upper slitting blade, thereby improving the slitting precision.

[0014] Preferably, the end faces of the two outer sleeves that are close to each other are provided with clearance grooves for installing air-expanding sleeves or disc springs.

[0015] By adopting the above technical solution, the opening of the clearance groove can make the air expansion sleeve and the disc spring more stable to be installed, ensuring the stable operation of the whole device.

[0016] Preferably, a color mark sensor is provided on one side of the bearing housing.

[0017] By adopting the above technical solution, a color mark sensor can be set to detect whether there is adhesive tape on the surface of the electrode sheet. Based on the detection result, the upper slitting blade can be precisely adjusted to improve the subsequent slitting quality.

[0018] Preferably, the distance between the two lower cutting blades is twice the thickness of the upper cutting blade.

[0019] By adopting the above technical solution, the distance between the two lower slitting blades is set to twice the thickness of the upper slitting blade, which facilitates flexible adjustment of the position of the upper slitting blade, thereby improving the slitting quality of the electrode sheet.

[0020] Preferably, locking nuts are provided on the end walls at both ends of the upper spacer and on the opposite side end walls of the two lower spacers.

[0021] By adopting the above technical solution, the locking nut can ensure the stability of the installation of the upper and lower spacers, making the electrode slitting device of this application safer and more reliable in operation.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The electrode passes between the upper and lower cutting shafts and is cut by the upper and lower cutting blades. Based on the state of the electrode, the distance between the upper cutting blade and the lower cutting blades on both sides can be adjusted to achieve the switching between single-blade and double-blade structures, thereby improving the cutting effect.

[0024] 2. A color mark sensor is installed to detect whether there is adhesive tape on the surface of the electrode. Based on the detection result, the upper slitting blade is precisely adjusted to improve the subsequent slitting quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the double-edged structure in the background art.

[0026] Figure 2 This is a schematic diagram of the single-blade structure in the background art.

[0027] Figure 3 This is a cross-sectional view of an electrode slitting mechanism according to an embodiment of this application.

[0028] Figure 4 This is a schematic diagram of the structure of an electrode slitting mechanism according to an embodiment of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Base; 2. Bearing seat; 3. Upper cutter shaft; 4. Lower cutter shaft; 5. Upper spacer; 501. Outer sleeve; 502. First center sleeve; 503. Second center sleeve; 504. Air expansion sleeve; 505. Butterfly spring; 506. Gap; 507. Tension spring; 508. Relief groove; 6. Lower spacer; 7. Upper slitting blade; 8. Lower slitting blade; 9. Washer; 10. Color mark sensor; 11. Locking nut; 12. Electrode. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 3-4 This application will be described in further detail.

[0031] This application discloses an electrode slitting mechanism. (Refer to...) Figure 3 The device includes a base 1, on the surface of which are two parallel bearing shafts. An upper cutting shaft 3 and a lower cutting shaft 4 are rotatably connected between the two bearing seats 2. The upper cutting shaft 3 and the lower cutting shaft 4 are arranged in parallel. Both the upper cutting shaft 3 and the lower cutting shaft 4 are rotatably connected to the bearing seats 2 through bearings. One end of the upper cutting shaft 3 and the lower cutting shaft 4 is provided with a coupling and a motor for rotating relative to the bearing seats 2.

[0032] Reference Figure 3 The upper cutter shaft 3 is fitted with an upper spacer sleeve 5 on its peripheral wall. The upper spacer sleeve 5 includes two outer sleeves 501, a first center sleeve 502 and a second center sleeve 503 disposed between the two outer sleeves 501. The end walls of the two outer sleeves 501 that are close to each other are provided with relief grooves 508. An air expansion sleeve 504 is provided in one relief groove 508 where one outer sleeve 501 and the first center sleeve 502 are close to each other, and a butterfly spring 505 is provided in the relief groove 508 where the other outer sleeve 501 and the second center sleeve 503 are close to each other. In this embodiment, a locking nut 11 is provided on the end wall of the two outer sleeves 501 that are far from each other. The locking nut 11 is fitted on the peripheral wall of the upper cutter shaft 3. The peripheral wall of the upper cutter shaft 3 facing the relief grooves 508 on both sides is provided with a stepped structure. Under the action of the locking nut 11, the outer sleeves 501 can abut against the stepped structure to maintain the stability of the distance between the two outer sleeves 501.

[0033] Reference Figure 3 and Figure 4 A gap 506 is reserved between the first center sleeve 502 and the second center sleeve 503. An upper slitting blade 7 is installed in the gap 506, and a tension spring 507 is also installed in the gap 506. The tension spring 507 abuts against the upper slitting blade 7 and the inner wall of the gap 506. Thus, the first center sleeve 502 and the second center sleeve 503 are set to be slidable relative to the upper blade shaft 3 so as to adjust the position of the upper slitting blade 7. In this embodiment, a color mark sensor 10 is provided on one side of the bearing seat 2 to detect whether there is adhesive tape on the surface of the electrode sheet 12 to be slid. Based on the detection result, the air pressure in the air expansion sleeve 504 is controlled to realize the adjustment of the upper slitting blade 7.

[0034] Reference Figure 3 The lower blade shaft 4 is fitted with two lower spacers 6. Each of the two lower spacers 6 is provided with a lower slitting blade 8 at one end that is close to each other. The blade of the upper slitting blade 7 can be adjusted between the blades of the two lower slitting blades 8. In this embodiment, the distance between the two lower slitting blades 8 is twice that of the upper slitting blade 7. A washer 9 is provided between the two lower slitting blades 8 to maintain the stability of the distance between the two lower slitting blades 8. Locking nuts 11 are also provided on the end walls of the two lower spacers 6 that are far from each other to maintain the stability between the lower spacers 6.

[0035] The implementation principle of the electrode slitting mechanism in this application is as follows: Before slitting, the color mark sensor 10 detects whether there is tape on the surface of the incoming material. When there is no tape, the air pressure in the air expansion sleeve 504 is controlled by the proportional valve. At this time, under the thrust of the air expansion sleeve 504, the first center sleeve 502 and the second center sleeve 503 overcome the elastic force of the butterfly spring 505, so that the outer sleeve 501 on one side contacts the left end face, thereby realizing the double-blade slitting mode. When the sensor detects tape on the incoming material, the air pressure in the air expansion sleeve 504 is slowly reduced by the proportional valve. Under the action of the butterfly spring 505, the first center sleeve 502 and the second center sleeve 503 slowly move to the left, and the outer sleeve 501 on the right side reaches and always contacts the right end face, forming a single-blade slitting mode. The slitting device of this application can change the slitting mode based on different working conditions, improve the service life of the slitting blade, and ensure that the electrode 12 can be slitting smoothly.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electrode slitting mechanism, characterized in that: The device includes a base on which two parallel bearing seats are mounted. An upper cutter shaft and a lower cutter shaft are rotatably connected between the two bearing seats. The upper cutter shaft and the lower cutter shaft are arranged in parallel. An upper spacer is fitted around the periphery of the upper cutter shaft, and an upper slitting blade is mounted on the upper spacer. Two lower spacers are fitted around the periphery of the lower cutter shaft, and a lower slitting blade is mounted at one end of each of the two lower spacers that are close to each other. The blade of the upper slitting blade is adjustablely positioned between the blades of the two lower slitting blades.

2. The electrode slitting mechanism according to claim 1, characterized in that: A washer is provided between the two lower cutting blades, and the washer abuts against the end faces of the two lower cutting blades.

3. The electrode slitting mechanism according to claim 1, characterized in that: The upper spacer includes two outer sleeves, a first central sleeve and a second central sleeve disposed between the two outer sleeves. An air-expanding sleeve is disposed between one outer sleeve and the first central sleeve, and a butterfly spring is disposed between the other outer sleeve and the second central sleeve. The first central sleeve and the second central sleeve are both slidably connected to the upper cutter shaft. A gap is preset between the first central sleeve and the second central sleeve for the installation of the upper slitting blade.

4. The electrode slitting mechanism according to claim 3, characterized in that: A tension spring is provided in the gap, and the tension spring abuts between the end face of the upper slitting blade and the end face of the second center sleeve.

5. The electrode slitting mechanism according to claim 3, characterized in that: Both outer sleeves have clearance grooves on their close-to-each end faces for mounting air-expanding sleeves or disc springs.

6. The electrode slitting mechanism according to claim 1, characterized in that: A color mark sensor is installed on one side of the bearing housing.

7. The electrode slitting mechanism according to claim 1, characterized in that: The distance between the two lower slitting blades is twice the thickness of the upper slitting blade.

8. The electrode slitting mechanism according to claim 1, characterized in that: Locking nuts are provided on both end walls of the upper partition sleeve and on the opposite side end walls of the two lower partition sleeves.

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