Tape splicing and reel changing mechanism for electrode plates and unwinding system of tape splicing and reel changing mechanism

By setting a hollow rod above the drum of the electrode sheet and adsorbing the electrode sheet with a negative pressure pipeline, the fixed loss problem caused by the coiling of the belt in electrode preparation is solved, and the tape connection operation at the drum position is realized, and lithium ions are reduced Battery preparation costs and improves production efficiency.

CN222181260UActive Publication Date: 2024-12-17EVE POWER CO LTD
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Patent Information

Application Number
CN202323668692.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-29
Publication Date
2024-12-17
Estimated Expiration
2033-12-29

AI Technical Summary

Technical Problem

During the preparation of existing electrodes, the tape and coiling operation of the electrode sheet leads to waste of fixed losses, increasing the preparation cost of lithium-ion batteries.

Method used

Design a belt-to-rolling mechanism for electrode sheets, including a bracket, hollow rod and negative pressure pipe. By setting a hollow rod above the drum and using the negative pressure pipe to provide adsorption force, the old tail material and new coil electrode sheet are reduced. The distance between them realizes the belt-to-rolling and coil replacement operation at the reel, reducing fixed losses.

Benefits of technology

It effectively reduces the fixed loss of electrode sheets between the old roll-tail material and the original tape platform, reduces the cost of lithium-ion battery preparation, and improves production efficiency and operation safety.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of lithium battery element production equipment, in particular to a tape splicing and roll changing mechanism of an electrode plate and an unwinding system of the electrode plate, the tape splicing and roll changing mechanism comprises a support, a hollow rod and a negative pressure pipeline, the negative pressure pipeline is communicated with the middle of the hollow rod, two ends of the hollow rod are connected with the support, and the hollow rod is used for being parallel to a winding drum. The hollow rod is provided with a through hole, the negative pressure pipeline is used for extracting air in the hollow rod, and negative pressure for adsorbing an electrode plate on the winding drum is formed at the through hole. According to the tape splicing and roll changing mechanism, the old roll tailings are adsorbed through the hollow rod parallel to the winding drum, the distance between the old roll tailings and a new roll is reduced, the electrode plate fixing loss between the old roll tailings and an original tape splicing platform is reduced, and the preparation cost of the lithium ion battery is reduced. The unwinding system carries out tape splicing operation of new and old rolls of the electrode plates at the winding drum, fixed loss between the winding drum and an original tape splicing platform is eliminated, the electrode plates do not need to be manually pulled to the tape splicing platform, operation is faster and safer, production cost is reduced, and production efficiency is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery element production equipment, in particular to a tape splicing and reeling mechanism for an electrode sheet and a reeling system thereof. Background Art

[0002] Electrode preparation is an important part of the lithium-ion battery preparation process. In the existing electrode preparation process, the electrode sheets are all wound up. The rolled electrode sheets inevitably need to face the tape splicing and rewinding operation during the rolling and cutting processes. The splicing and rewinding operation realizes the continuity of two rolls of electrode sheets. Figure 1 As shown, the conventional splicing operation between two rolls of electrode sheets is generally performed on a splicing platform 10 , wherein the top plane of the splicing platform 10 provides a splicing working surface, and the electrode sheets are tightened by a plurality of rollers 20 disposed between the splicing platform 10 and the reel 9 .

[0003] At present, when it is necessary to carry out the splicing operation, in order to ensure that the electrode sheet is always in a taut state, it is necessary to press the electrode sheet by the pressure strip on the splicing platform 10, separate the electrode sheet tail between the splicing platform 10 and the reel 9 by cutting, remove the old roll of electrode sheet with the tail, and then install a new roll of electrode sheet, and manually pull the new roll of electrode sheet to the splicing platform 10 for the splicing operation, which will result in 2-4m of electrode sheet fixed loss waste from the reel 9 to the splicing platform 10. This part of waste increases the preparation cost of lithium-ion batteries and has become an industry problem that troubles many battery manufacturers.

[0004] Therefore, there is an urgent need for a technical solution to solve the technical problem of fixed loss waste caused by the tape splicing and reeling process in the existing electrode preparation, which increases the cost of lithium-ion battery preparation. Utility Model Content

[0005] The utility model aims to provide a tape splicing and reeling mechanism for electrode sheets and its unwinding system in order to solve the technical problem that the tape splicing and reeling process in the existing electrode preparation causes fixed loss waste and increases the preparation cost of lithium-ion batteries.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A tape splicing and reel-changing mechanism for an electrode sheet comprises a bracket, a hollow rod and a negative pressure pipe, wherein the negative pressure pipe is connected to the middle of the hollow rod, and the two ends of the hollow rod are connected to the bracket. The hollow rod is provided with a through hole, and the negative pressure pipe is used to extract air from the hollow rod to form a negative pressure at the through hole for adsorbing the electrode sheet, and the hollow rod is used to be arranged parallel to the reel.

[0008] The utility model discloses a tape splicing and reeling mechanism for electrode sheets. A hollow rod is arranged parallel to a reel of electrode sheets through a bracket. Negative pressure is formed at the through hole of the hollow rod to adsorb the electrode sheets on the reel, thereby reducing the distance between the old reel tail and the new reel electrode sheets. The tape splicing and reeling operation can be performed at the reel, thereby reducing the fixing loss of the electrode sheets between the old reel tail and the original tape splicing platform, and reducing the preparation cost of lithium-ion batteries.

[0009] As a preferred solution of the utility model, the bracket includes two vertical plates arranged opposite to each other, and the vertical plates are provided with limiting holes adapted to the hollow rod; the hollow rod includes a hollow section and connecting sections arranged at both axial ends of the hollow section, and the connecting sections can be detachably connected to the limiting pieces after passing through the limiting holes. This makes the combined structure of the bracket and the hollow rod simple and easy to set up, and can be easily installed and fixed according to the use requirements, and the auxiliary adsorption position can be adjusted.

[0010] As a preferred solution of the utility model, the limiting hole is an arc-shaped hole that gradually rises from the middle to the two ends, and the hollow rod is slidably matched with the limiting hole, so that the hollow rod can slide along the limiting hole but cannot rotate relatively. At the same time, the limiting hole is set as an arc-shaped hole, so that the hollow rod can change the direction of the through hole accordingly when sliding along the limiting hole, which is convenient for adjusting the direction of the through hole, and then changing the adsorption position of the electrode sheet.

[0011] As a preferred solution of the utility model, the through hole comprises a strip hole, the length of the strip hole along the axis direction of the hollow rod is adapted to the width of the electrode sheet, and the strip hole can provide adsorption stability in the width direction of the electrode sheet.

[0012] As a preferred solution of the utility model, the through hole includes a plurality of hole structures arranged in an array, and the size of the through hole gradually increases from the middle to both ends of the hollow rod, and the negative pressure pipe is staggered with the hole structure. The size of the through hole closer to the negative pressure pipe is relatively small, which can balance the different adsorption forces caused by the distance, improve the adsorption stability of the electrode sheet, and avoid the formation of excessive adsorption force in the middle of the hollow rod.

[0013] As a preferred solution of the utility model, the hollow rod comprises a round rod, and the through hole comprises a round hole, so as to avoid indentation of the electrode sheet during the adsorption stabilization process.

[0014] As a preferred solution of the utility model, a pressure regulating mechanism and a pressure display mechanism are arranged on the negative pressure pipeline to facilitate the adjustment of the adsorption force and improve the flexibility of the mechanism.

[0015] As a preferred solution of the utility model, at least two hollow rods are arranged in parallel, each of which is connected to the negative pressure pipe, two adjacent hollow rods are arranged in a staggered manner in the height direction, and two adjacent hollow rods are arranged on the same bracket or connected to the bracket respectively. The multiple hollow rods cooperate with each other to achieve the adsorption of the electrode sheet with a certain curvature, improve the adsorption stability and avoid the indentation under the action of the adsorption force.

[0016] As a preferred solution of the utility model, a shielding cover is slidably arranged on the hollow rod, and the shielding cover can partially shield the through hole, so as to stably adsorb electrode sheets of different widths.

[0017] An electrode sheet unwinding system comprises an unwinding device, wherein the unwinding device is provided with a reel for winding the electrode sheet, a tape splicing and reel changing mechanism for the electrode sheet as described above is arranged parallelly above the reel, the bracket is detachably connected to the top surface of the unwinding device, and the negative pressure pipe is used to connect to a central dust collector in a workshop.

[0018] The utility model discloses an electrode sheet unwinding system, which arranges a splicing and reel-changing mechanism above a reel, and a central dust collector provides negative pressure to adsorb the electrode sheet, so that the new and old electrode sheets can be spliced ​​at the reel, eliminating the fixed loss between the reel and the original splicing platform. The operation is simple, and there is no need to manually pull the electrode sheet to the splicing platform. The operation is faster and safer, which reduces production costs and improves production efficiency.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the electrode sheet splicing and reel changing mechanism of the utility model are:

[0020] The utility model discloses a tape splicing and reeling mechanism for electrode sheets. The hollow rod can be arranged parallel to the reel of the electrode sheet through a bracket. Negative pressure is formed at the through hole of the hollow rod to adsorb the electrode sheet on the reel, reducing the distance between the old reel tail and the new reel electrode sheet, so that the tape splicing and reeling operation can be performed at the reel, reducing the electrode sheet fixing loss between the old reel tail and the original tape splicing platform, and reducing the preparation cost of lithium-ion batteries.

[0021] The beneficial effects of the electrode sheet unwinding system of the utility model are:

[0022] The utility model discloses an electrode sheet unwinding system, which arranges a splicing and reel-changing mechanism above a reel, and a central dust collector provides negative pressure to adsorb the electrode sheet, so that the new and old electrode sheets can be spliced ​​at the reel position, eliminating the fixed loss between the reel and the original splicing platform. The operation is simple, and there is no need to manually pull the electrode sheet to the splicing platform. The operation is faster and safer, which reduces production costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an unwinding system of an electrode sheet in the prior art;

[0024] Figure 2 is a schematic structural diagram of the hollow rod described in Example 1;

[0025] Figure 3 yes Figure 2 Schematic diagram of the structure of the AA section;

[0026] Figure 4 This is a schematic structural diagram of a tape splicing and reel changing mechanism for an electrode sheet in Example 1;

[0027] Figure 5 is a schematic structural diagram of the vertical plate described in Example 1;

[0028] Figure 6 This is a schematic diagram of the use state of a tape splicing and reel changing mechanism for an electrode sheet in Example 1;

[0029] Figure 7 This is an axonometric view of a tape splicing and reel changing mechanism for an electrode sheet in use in Example 1;

[0030] Figure 8 This is a schematic diagram of the use state of a tape splicing and reel changing mechanism for an electrode sheet in Example 2;

[0031] Fig. 9 It is a structural schematic diagram of an electrode sheet unwinding system of Example 4.

[0032] icon:

[0033] 1- bracket, 11- vertical plate, 12- limiting hole, 2- hollow rod, 21- through hole, 22- hollow section, 23- connecting section, 3- negative pressure pipeline, 4- limiting member, 5- pressure regulating mechanism, 6- pressure display mechanism, 7- shielding cover, 8- unwinding device, 9- reel, 10- tape connection platform, 20- roller. DETAILED DESCRIPTION

[0034] The utility model is described in detail below in conjunction with the accompanying drawings.

[0035] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0036] Example 1

[0037] like Figure 2-Figure 7As shown, a tape splicing and reel-changing mechanism for an electrode sheet of the present embodiment comprises a bracket 1, a hollow rod 2 and a negative pressure pipe 3, one end of the negative pressure pipe 3 is connected to the middle of the hollow rod 2, and the other end is used to connect to the negative pressure mechanism, the two ends of the hollow rod 2 are connected to the bracket 1, so that the hollow rod 2 can be arranged parallel to the reel 9, the hollow rod 2 is provided with a through hole 21, the negative pressure pipe 3 is used to extract the air in the hollow rod 2, and the through hole 21 forms a negative pressure for adsorbing the electrode sheet on the reel.

[0038] The present embodiment is a kind of electrode sheet splicing and reeling mechanism. When in use, the hollow rod 2 is set parallel to the top of the reel 9 through the bracket 1, and the central dust collector equipped in the lithium battery preparation process workshop is used as a negative pressure mechanism. A negative pressure of -20 to -40 kPa is formed at the through hole 21 of the hollow rod 2 to temporarily adsorb and fix the electrode sheet of the old roll tail material, which can reduce the distance between the old roll tail material and the new roll, realize the splicing and reeling operation of the electrode sheet near the hollow rod 2, reduce the electrode sheet fixing loss between the old roll tail material and the original splicing platform 10, and reduce the preparation cost of lithium ion batteries. At the same time, during the splicing and reeling process, the electrode sheet can be tightened and fixed by the pressure strip on the splicing platform 10, so that the tension state of the electrode sheet before and after the splicing is less affected, and it can ensure that the electrode sheet entering the subsequent process is always in a tightened state, improve the preparation efficiency and yield rate, and is conducive to reducing the overall preparation cost of lithium ion batteries. The splicing and reeling mechanism is easy to install on the existing electrode sheet unwinding device 8, and can reduce the preparation cost and improve the preparation efficiency with a small modification cost.

[0039] Preferably, the bracket 1 includes two vertical plates 11 arranged opposite to each other, and a limiting hole 12 adapted to the hollow rod 2 is provided on the vertical plates 11; the hollow rod 2 includes a hollow section 22 and connecting sections 23 arranged at both axial ends of the hollow section 22, and the connecting section 23 can be detachably connected to the limiting member 4 after passing through the limiting hole 12. In this embodiment, the vertical plate 11 includes a conventional plate-like structural member, and can also be an adjustable telescopic structure composed of screws and slots after a plurality of plate-like structural parts are stacked. The hollow rod 2 includes a round rod, and the hollow rod 2 is supported by the vertical plate 11 to achieve the parallel arrangement of the hollow rod 2 near the reel 9. The limiter 4 includes a bolt or a bolt structure with a handle. The limiter 4 is threadedly connected to the axial end face of the connecting section 23. After the limiter 4 is locked with the hollow rod 2, the limiter 4 can abut against the vertical plate 11 to limit the movement and rotation of the hollow rod 2. The combined structure of the bracket 1 and the hollow rod 2 is simple and easy to set up, and can be easily installed, fixed and adjusted in height according to usage requirements.

[0040] Preferably, the limiting hole 12 is an arc-shaped hole that gradually rises from the middle to both ends, and the hollow rod 2 is slidably matched with the limiting hole 12. In this embodiment, a plane or rib is provided on the outer surface of the connecting section 23 of the hollow rod 2, so that the hollow rod 2 can slide along the limiting hole 12 but cannot rotate relatively. When the hollow rod 2 slides along the limiting hole 12, the orientation of the through hole 21 can be changed accordingly, which facilitates the orientation adjustment of the through hole 21, thereby quickly changing the adsorption position of the electrode sheet.

[0041] In some embodiments, the through hole 21 comprises a strip hole, and the length of the strip hole along the axis direction of the hollow rod 2 is adapted to the width of the electrode sheet. The rectangular strip hole can provide adsorption stability in the width direction of the electrode sheet.

[0042] In some embodiments, the through hole 21 includes a plurality of hole structures arranged in an array, and the size of the through hole 21 gradually increases from the middle to the two ends of the hollow rod 2, and the negative pressure pipe 3 is staggered with the hole structure. The through hole 21 at the position away from the negative pressure pipe 3 is made relatively small, and excessive negative pressure is avoided at the position opposite to the negative pressure pipe 3, so as to balance the different adsorption forces at each hole structure caused by the distance, improve the adsorption stability of the electrode sheet and avoid the formation of adsorption marks. Preferably, the through hole 21 is a round hole.

[0043] Preferably, a pressure regulating mechanism 5 and a pressure display mechanism 6 are provided on the negative pressure pipe 3 to facilitate the adjustment of the adsorption force and improve the flexibility of the mechanism. The pressure regulating mechanism 5 is preferably a manual pressure regulating valve, and the pressure display mechanism 6 is preferably a pressure gauge or a pressure sensor, so that the adsorption force can be adjusted according to actual conditions during the process of splicing and changing rolls.

[0044] Example 2

[0045] like Figure 8 As shown, a tape splicing and roll changing mechanism for an electrode sheet of this embodiment, based on embodiment 1, further comprises two hollow rods 2 arranged in parallel, each of the hollow rods 2 is respectively connected to the negative pressure pipe 3, the two hollow rods 2 are staggered in height direction, and the height of the hollow rods 2 is reduced along the transmission and feeding direction of the electrode sheet, and the two hollow rods 2 are arranged on the same bracket 1.

[0046] The present embodiment provides a tape splicing and reel changing mechanism for an electrode sheet, which, by arranging a plurality of hollow rods 2 to cooperate with each other, can perform multi-position adsorption and fixation of the electrode sheet, making the adsorption and fixation more stable. At the same time, the relative position difference between adjacent hollow rods 2 can realize adsorption of the electrode sheet with a certain arc, thereby improving the adsorption stability and avoiding the generation of indentations under the action of the adsorption force.

[0047] Preferably, the number of vertical plates 11 can be adjusted according to actual conditions, and the two hollow rods 2 can be set on different brackets 1 to adapt to the installation requirements in the use environment, avoid interference in the installation position, and affect the smooth progress of other processes.

[0048] Example 3

[0049] like Fig. 9 As shown, in the present embodiment, a tape splicing and reel changing mechanism for an electrode sheet is provided. Based on the embodiment 1 or the embodiment 2, a shielding cover 7 is slidably provided on the hollow rod 2 , and the shielding cover 7 can partially shield the through hole 21 .

[0050] The present embodiment is a tape splicing and reel changing mechanism for an electrode sheet, wherein the shielding cover 7 includes an annular structure clamped on the hollow rod 2, and the shielding cover 7 partially shields the hollow rod 2, and can partially shield the through hole 21, and adjust the position where negative pressure is formed on the hollow rod 2 to adapt to stable adsorption of electrode sheets of different widths.

[0051] Example 4

[0052] like Figure 8 As shown, an electrode sheet unwinding system includes an unwinding device 8, on which a reel 9 is disposed, and above the reel 9 is disposed a tape splicing and reel changing mechanism for an electrode sheet as described above, wherein the bracket 1 is detachably connected to the top surface of the unwinding device 8, and the negative pressure pipe 3 is used to connect to a central dust collector in a workshop.

[0053] In the unwinding system of an electrode sheet of the present embodiment, a splicing and reel-changing mechanism is arranged above a reel 9 through a bracket 1. The hollow rod 2 of the splicing and reel-changing mechanism is about 1.4 m from the ground. The negative pressure pipe 3 is connected to a central dust collector related to the unwinding device 8. The central dust collector provides negative pressure to adsorb the electrode sheet, and the new and old rolls of electrode sheets are spliced ​​at the position of the reel 9, eliminating the fixed loss between the reel 9 and the original splicing platform 10. The operation is simple, and there is no need to manually pull the electrode sheet to the splicing platform 10. The operation is faster and safer, which reduces production costs and improves production efficiency.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tape splicing and reel changing mechanism for an electrode sheet, characterized in that: The invention comprises a support (1), a hollow rod (2) and a negative pressure pipe (3), wherein the negative pressure pipe (3) is connected to the middle part of the hollow rod (2), and the two ends of the hollow rod (2) are connected to the support (1), the hollow rod (2) is used to be arranged in parallel with the winding drum (9), the hollow rod (2) is provided with a through hole (21), the negative pressure pipe (3) is used to extract air in the hollow rod (2), and the through hole (21) forms a negative pressure for adsorbing the electrode sheet on the winding drum (9).

2. The electrode sheet splicing and reel changing mechanism according to claim 1, characterized in that: The bracket (1) comprises two vertical plates (11) arranged opposite to each other, and a limiting hole (12) adapted to the hollow rod (2) is arranged on the vertical plates (11); the hollow rod (2) comprises a hollow section (22) and connecting sections (23) arranged at two axial ends of the hollow section (22), and the connecting section (23) can be detachably connected to the limiting member (4) after passing through the limiting hole (12).

3. The electrode sheet splicing and reel changing mechanism according to claim 2, characterized in that: The limiting hole (12) is an arc-shaped hole that gradually rises from the middle to the two ends, and the hollow rod (2) is slidably matched with the limiting hole (12).

4. The electrode sheet splicing and reel changing mechanism according to claim 1, characterized in that: The through hole (21) comprises a strip-shaped hole, and the length of the strip-shaped hole along the axis direction of the hollow rod (2) is adapted to the width of the electrode sheet.

5. The electrode sheet splicing and reel changing mechanism according to claim 1, characterized in that: The through hole (21) comprises a plurality of hole structures arranged in an array, and the size of the through hole (21) gradually increases from the middle to the two ends of the hollow rod (2), and the negative pressure pipe (3) is staggered with the hole structure.

6. The electrode sheet splicing and reel changing mechanism according to claim 5, characterized in that: The hollow rod (2) comprises a round rod, and the through hole (21) comprises a round hole.

7. The electrode sheet splicing and reel changing mechanism according to claim 1, characterized in that: The negative pressure pipeline (3) is provided with a pressure regulating mechanism (5) and a pressure display mechanism (6).

8. The electrode sheet splicing and reel changing mechanism according to claim 1, characterized in that: It comprises at least two hollow rods (2) arranged in parallel, each of the hollow rods (2) is respectively connected to the negative pressure pipe (3), two adjacent hollow rods (2) are arranged in a staggered manner in the height direction, and two adjacent hollow rods (2) are arranged on the same bracket (1) or are respectively connected to the bracket (1).

9. The electrode sheet splicing and reel changing mechanism according to any one of claims 1 to 8, characterized in that: A shielding cover (7) is slidably arranged on the hollow rod (2), and the shielding cover (7) can partially shield the through hole (21).

10. An electrode sheet unwinding system, characterized in that: It comprises an unwinding device (8), the unwinding device (8) is provided with a reel (9) for winding the electrode sheet, a tape splicing and reel changing mechanism for the electrode sheet as claimed in claim 1 is arranged parallel to the reel (9), the bracket (1) is detachably connected to the top surface of the unwinding device (8), and the negative pressure pipe (3) is used to connect to the central dust collector of the workshop.