An automatic roll changing mechanism for electrode plate roll and a battery electrode plate production line

Abstract

The utility model relates to battery pole piece production technical field discloses a kind of automatic roll changing mechanism and battery pole piece production line of pole piece roll, mechanism includes roll changing subassembly, roll changing subassembly front side is discharge direction, and discharge direction is equipped with material guiding subassembly and material receiving subassembly, and the material receiving subassembly of front side is located between material guiding subassembly and roll changing subassembly;The rear side of roll changing subassembly is feed direction, and feed direction is also equipped with material guiding subassembly and material receiving subassembly, and the material receiving subassembly of rear side is located between material guiding subassembly and roll changing subassembly.The scheme is used to the winding of pole piece and the buffer of roll between coating mechanism and roll mechanism in battery pole piece production line, by material guiding subassembly, the pole piece of previous sequence station incoming is introduced into roll changing mechanism, then by material receiving subassembly, pole piece is connected with roll changing subassembly after winding, and roll after winding needs to be introduced into next station, then by material guiding subassembly, to keep the continuity of battery pole piece production operation, to improve overall production efficiency and equipment utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode production technology, and in particular to an automatic rewinding mechanism for electrode rolls and a battery electrode production line. Background Technology

[0002] In the lithium battery industry, lithium battery coating machines are key equipment for producing lithium battery electrodes. With the rapid development of the industry, higher demands are placed on the production efficiency and stability of lithium battery coating machines. Coating machines and roller slitting machines are typically operated separately and independently. Traditional coating machines generally employ a dual-shaft automatic winding structure, which has many limitations in actual production. On the one hand, when abnormalities occur during the coating process, such as slurry blockage, uneven coating thickness, or unstable pressure and scratches on the electrode surface during rolling, the limitations of the winding system often necessitate stopping the entire machine's operation for troubleshooting and repair, significantly reducing equipment uptime. On the other hand, operating the coating machine and roller slitting machine separately makes the entire production process more cumbersome, requires a larger equipment footprint, and the electrodes are easily affected by external factors, such as dust contamination, during the transfer from the coating machine to the roller slitting machine, thus affecting product quality. Therefore, developing a technology that can connect a coating machine and a roller separator into a single unit and ensure continued operation of the equipment even in the event of coating or roller pressing malfunctions, thereby improving equipment productivity, is of great practical significance.

[0003] Chinese patent application CN201820013198.0 discloses an integrated power lithium battery machine, including a first rail base and, sequentially arranged horizontally at the bottom of the first rail base, a gravure double-sided base coating second-side printing mechanism, a gravure double-sided base coating fully automatic roll-changing and unwinding mechanism, a gravure double-sided base coating unwinding traction tension mechanism, a gravure double-sided base coating first-side printing mechanism, and a gravure double-sided base coating oven exit traction mechanism. The top of the first rail base is vertically fixedly connected to a gravure double-sided base coating second-layer oven and a gravure double-sided base coating first-layer oven via a bracket. A backup fully automatic roll-changing mechanism for the gravure double-sided base coating and double-sided extrusion coating machine is located on the side of the gravure double-sided base coating oven exit traction mechanism away from the gravure double-sided base coating first-side printing mechanism. This utility model has a reasonable structure, is easy to operate, and has high working efficiency. The streamlined production process helps improve the consistency and standardization of battery electrodes. However, this solution needs further improvement.

[0004] This invention overcomes the shortcomings of the prior art and provides an automatic rewinding mechanism for electrode rolls and a battery electrode production line, which can realize automatic winding and automatic rewinding between the coating mechanism and the rolling mechanism in the battery electrode production line. Utility Model Content

[0005] The main objective of this utility model is to provide an automatic rewinding mechanism for electrode rolls, including a rewinding assembly. The front side of the rewinding assembly is the discharge direction, and a feeding assembly and a receiving assembly are provided in the discharge direction. The receiving assembly at the front side is located between the feeding assembly and the rewinding assembly. The rear side of the rewinding assembly is the feeding direction, and a feeding assembly and a receiving assembly are also provided in the feeding direction. The receiving assembly at the rear side is located between the feeding assembly and the rewinding assembly.

[0006] Optionally, the winding assembly is used for winding the electrode sheet and can carry multiple sets of material rolls, which can be switched between the discharge direction and the feed direction by rotation; The feeding assembly is used to pull the discharge electrode sheet in the discharge direction to the winding assembly for winding, or to pull the material head of the winding assembly to the feeding direction for unwinding. The receiving assembly is used to connect the electrode sheet to the roll in the changing assembly.

[0007] Optionally, the roll changing assembly includes a frame and a rotating base. The rotating base is rotatably connected to the frame. Multiple fixed supports are radially distributed outward from the rotating base and connected to it. The angles between adjacent fixed supports are the same. Each fixed support is provided with a roll. The rotation of the rotating base drives the multiple fixed supports to rotate and switch positions between the discharge direction and the feed direction. The roll is used for winding the electrode sheet and carrying the roll.

[0008] Optionally, the number of fixed brackets is 4-8, and the included angle between adjacent fixed brackets is equal.

[0009] Optionally, the receiving assembly includes a rotating arm, which is rotatably connected to the frame via a rotating shaft, and the drum is located within the rotation range of the rotating arm; the rotating arm is equipped with a cutter, a pressure roller, and a pushing cylinder, the pushing cylinder being drivenly connected to the pressure roller, and the pushing cylinder pushing the pressure roller to move towards the drum; the frame is equipped with a limiting block, which is located within the rotation range of the rotating arm.

[0010] Optionally, the feeding assembly includes multiple guide rollers and tension rollers. The guide rollers are rotatably connected to the frame. One of the guide rollers is connected to the frame via a rotating arm. The tension roller is rotatably connected to the frame. The rotating arm is rotatably connected to the frame. The rotating arm is driven to rotate by a tension output cylinder. The electrode sheet is pulled from the discharge direction to the rewinding assembly via a roller, or the roll is pulled from the rewinding assembly to the feed direction via a roller. The tension roller is used to detect the electrode sheet tension, and the tension output cylinder is used to provide the electrode sheet tension.

[0011] Optionally, the feeding assembly is further provided with a receiving platform, which is connected to the frame, and the roller traction electrode passes through the receiving platform.

[0012] Optionally, the feeding assembly includes a web guiding sensor connected to the frame, and the roller traction electrode passes through the web guiding sensor.

[0013] Optionally, the feeding direction is provided with an AGV loading area, which is located between the roll changing assembly and the feeding assembly, and the AGV loading area is provided with an AGV trolley.

[0014] This utility model also provides a battery electrode production line, including the above-mentioned automatic electrode roll changing mechanism, and further including a coating mechanism and a rolling mechanism. The automatic electrode roll changing mechanism is located between the coating mechanism and the rolling mechanism, and is used for conveying and preloading the electrode between the coating mechanism and the rolling mechanism. The coating mechanism is located in the discharge direction of the automatic electrode roll changing mechanism, and the rolling mechanism is located in the feed direction of the automatic electrode roll changing mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The automatic electrode roll changing mechanism provided by this utility model can be used for the winding of electrode rolls and buffering of material rolls between the coating mechanism and the rolling mechanism in a battery electrode production line. The electrode rolls from the previous station are introduced into the changing mechanism through the feeding component, and then the electrode rolls are connected to the changing component and wound up through the receiving component. When the wound material rolls need to be introduced to the next station, they are introduced to the next station through the feeding component, and the material rolls are connected to the electrode rolls of the subsequent station through the receiving component, so as to maintain the continuity of battery electrode production operations, thereby improving overall production efficiency and equipment utilization rate. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of an embodiment of the automatic rewinding mechanism for electrode sheet rolls of this utility model.

[0018] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the automatic rewinding mechanism for electrode sheet rolls of this utility model.

[0019] Figure 3 This is a schematic diagram of an embodiment of the battery electrode production line of this utility model.

[0020] Figure label: 1-Roll changing assembly; 11-Frame; 12-Rotating base; 13-Fixed bracket; 14-Roll drum; 2-Feeding assembly; 21-Passing roller; 22-Tension roller; 23-Rotating arm; 24-Tension output cylinder; 25-Tape receiving platform; 26-Correction sensor; 3-Feed receiving assembly; 31-Rotating arm; 32-Rotating shaft; 33-Cutter; 34-Pressure roller; 35-Push cylinder; 36-Limit block; 4-Electrode sheet; 5-Material roll; 6-AGV trolley; 10-Automatic roll changing mechanism for electrode sheet material roll; 20-Coating mechanism; 30-Roll pressing mechanism. Detailed Implementation

[0021] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only. In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of indicated technical features. Thus, unless otherwise stated, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0022] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium, or as a connection within two components. All technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0023] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1-2The diagram shown is a schematic representation of an embodiment of the automatic rewinding mechanism for electrode rolls provided by this utility model.

[0025] Please refer to Figure 1-2 This embodiment is used for the winding, unwinding, and buffering of electrode sheets between the coating mechanism and the rolling mechanism in a battery electrode sheet production line. This embodiment includes a rewinding assembly 1, with the front side of the rewinding assembly 1 facing the discharge direction. A feeding assembly 2 and a receiving assembly 3 are provided in the discharge direction, with the receiving assembly 3 located between the feeding assembly 2 and the rewinding assembly 1. Specifically, the discharge direction on the front side is the discharge direction after the coating mechanism has coated the electrode sheet. The feeding assembly 2 on this side introduces the electrode sheet conveyed by the coating mechanism into the rewinding mechanism, and connects to the rewinding assembly 1 through the receiving assembly 3. The rewinding assembly 1 performs winding and buffering of the electrode sheet.

[0026] The rear side of the rewinding assembly 1 is the feeding direction, which is also equipped with a feeding component 2 and a receiving component 3. The receiving component 3 on the rear side is located between the feeding component 2 and the rewinding assembly 3. The feeding direction on the rear side is specifically the feeding direction of the roller pressing mechanism. The receiving component 3 on this side connects the roll material wound by the rewinding assembly 1 to the end of the electrode sheet 4 of the roller pressing mechanism. The electrode sheet is output according to a predetermined direction through the feeding component 2, and the rewinding assembly 1 unwinds the roll material.

[0027] Specifically, the winding assembly is used for winding the electrode sheet and can carry multiple sets of material rolls. The multiple sets of material rolls can switch between the discharge direction and the feed direction by rotation to realize the buffering and switching of multiple sets of material rolls. In this embodiment, the winding and buffering of 4 sets of material rolls can be realized.

[0028] The feeding assembly 2 is used to guide the discharge electrode sheet in the discharge direction to the winding assembly 1 for winding, or to guide the head of the material roll in the winding assembly 1 to the feeding direction for unwinding. The receiving assembly 3 is used to connect the electrode sheet 4 to the roll 14 in the winding assembly 1.

[0029] In one embodiment, the winding assembly 1 includes a frame 11 and a rotating base 12. The rotating base 12 is rotatably connected to the frame 11. Multiple fixed supports 13 are radially distributed outward from the rotating base 12 and connected to it. The angle between adjacent fixed supports 13 is the same. Each fixed support 13 is correspondingly provided with a roll 14. The rotation of the rotating base 12 drives the multiple fixed supports 13 to rotate, switching positions between the discharge direction and the feed direction. The roll 14 is used for winding the electrode sheet and carrying the material roll. The rotating base 12 can be driven to rotate by a motor, and each roll 14 is controlled to rotate by a separate motor, realizing the winding and unwinding of the electrode sheet. The motor-driven rotation is a conventional existing structure, and its principle and specific structure will not be described in detail here. Specifically, in this embodiment, the number of fixed supports 13 is preferably four, and the included angle between adjacent fixed supports 13 is 90 degrees.

[0030] In one embodiment, the receiving assembly 3 includes a rotating arm 31, which is rotatably connected to the frame 11 via a rotating shaft 32. The drum 14 is located within the rotation range of the rotating arm 31. The rotating arm 31 is equipped with a cutter 33, a pressure roller 34, and a pushing cylinder 35. The pushing cylinder 35 is drively connected to the pressure roller 34, and pushes the pressure roller 34 to move towards the drum 14. The frame 11 is equipped with a limiting block 36, which is located within the rotation range of the rotating arm 31 and is used to limit the rotation range of the rotating arm 31.

[0031] The rotating arm 31 rotates, driving the cutter 33, pressure roller 34, and push cylinder 35 to rotate closer to or further away from the material roll 5 or drum 14 in the winding assembly 1. The push cylinder 35 pushes the pressure roller 34 further closer to the material roll 5 or drum 14, pushing the electrode sheet 4 to adhere to the drum 14. The drum 14 is pre-loaded with adhesive tape to adhere the electrode sheet 4, thus adhering the electrode sheet 4 to the drum 14. The rotation of the drum 14 causes the electrode sheet 4 to be wound into the material roll 5. During the winding process, the pressure roller 34 adheres to the outer side of the material roll 5 to prevent the material roll from unraveling. After the electrode sheet 4 is wound, the cutter 33 cuts the electrode sheet 4 from the material roll 5, completing the electrode sheet winding.

[0032] In one embodiment, the feeding assembly 2 includes multiple guide rollers 21 and tension rollers 22. The guide rollers 21 are rotatably connected to the frame 11, and one of the guide rollers 21 is connected to the frame 11 via a rotating arm 23. The rotating arm 23 is rotatably connected to the frame 11 and is driven to rotate by a tension output cylinder 24. The tension roller 22 is rotatably connected to the frame 11. The electrode sheet 4 on the front side of the rewinding assembly 1 is pulled from the discharge direction to the rewinding assembly 1 via the guide rollers 21, and the material roll on the rear side of the rewinding assembly 1 is pulled from the rewinding assembly 1 to the feeding direction via the guide rollers 21. The guide rollers 21 and tension rollers 22 serve to support and guide the electrode sheet. The conveying direction of the electrode sheet 4 is adjusted by setting multiple guide rollers 21, the tension of the electrode sheet 4 is detected by the tension rollers 22, and the tension output cylinder 24 is used to provide tension to the electrode sheet 4, so that the electrode sheet 4 is kept in a taut state during conveying.

[0033] In one embodiment, the feeding assembly 2 is further provided with a receiving platform 25, which is connected to the frame 11. The guide roller 21 pulls the electrode sheet through the receiving platform 25. The receiving platform 25 is used for manually connecting the end of the electrode sheet 4 to the beginning of the coil 5.

[0034] In one embodiment, the feeding assembly 2 includes a web guiding sensor 26 connected to the frame 11. The guide roller 21 pulls the electrode 4 through the web guiding sensor 26. The web guiding sensor 26 is used to detect the position of the electrode 4 so as to provide feedback and adjust the position of the electrode 4.

[0035] In one embodiment, an AGV loading area is provided in the feeding direction. The AGV loading area is located between the roll changing assembly 1 and the feeding assembly 2, and an AGV trolley 6 is provided in the AGV loading area. The AGV trolley 6 can carry the roll 5 to the AGV loading area for loading. In the event of a failure of the roll changing assembly 1, it can be used for additional loading to maintain the continuity of the production process.

[0036] like Figure 3 The diagram shown is a schematic representation of an embodiment of a battery electrode production line.

[0037] Please refer to Figure 3 This embodiment includes the aforementioned automatic electrode roll changing mechanism 10, as well as a coating mechanism 20 and a rolling mechanism 30. The automatic electrode roll changing mechanism 10 is located between the coating mechanism 20 and the rolling mechanism 30, and is used for conveying and preloading the electrode between the coating mechanism 20 and the rolling mechanism 30. The coating mechanism 20 is located in the discharge direction of the automatic electrode roll changing mechanism 10, and the rolling mechanism 30 is located in the feed direction of the automatic electrode roll changing mechanism 10.

[0038] In summary, the embodiments provided by this utility model, through an innovative four-axis winding design, effectively connect the coating mechanism and the roller slitting machine (roller pressing mechanism) into a whole, solving the problems of low equipment uptime and cumbersome production processes in the prior art. This allows another machine to continue operating even when coating or roller pressing malfunctions. Even when the coating machine stops and there is no roll supply, AGV automatic feeding trolleys can provide material, thereby improving overall production efficiency and equipment uptime. Increased equipment uptime means increased output per unit time, while reducing maintenance costs and production delay costs caused by equipment downtime.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this utility model as described above. For the sake of brevity, they are not provided in detail. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrode tab roll automatic changing mechanism characterized by comprising: The device includes a roll changing assembly. The front side of the roll changing assembly is the discharge direction, and a feeding assembly and a receiving assembly are provided in the discharge direction. The receiving assembly at the front side is located between the feeding assembly and the roll changing assembly. The rear side of the roll changing assembly is the feeding direction, and a feeding assembly and a receiving assembly are also provided in the feeding direction. The receiving assembly at the rear side is located between the feeding assembly and the roll changing assembly.

2. The automatic electrode roll changing mechanism according to claim 1, characterized in that, The winding assembly is used for winding the electrode sheet and can carry multiple sets of material rolls, which can switch between the discharge direction and the feed direction by rotation. The feeding assembly is used to pull the discharge electrode sheet in the discharge direction to the winding assembly for winding, or to pull the material head of the winding assembly to the feeding direction for unwinding. The receiving assembly is used to connect the electrode sheet to the roll in the changing assembly.

3. The automatic electrode roll changing mechanism according to claim 1, characterized in that, The roll changing assembly includes a frame and a rotating base. The rotating base is rotatably connected to the frame. Multiple fixed supports are radially distributed outward from the rotating base and connected to it. The angles between adjacent fixed supports are the same. Each fixed support is provided with a roll. The rotation of the rotating base drives the multiple fixed supports to rotate and switch positions between the discharge direction and the feed direction. The roll is used for winding the electrode sheet and carrying the roll.

4. The pole piece roll automatic changing mechanism according to claim 3, characterized in that, The number of fixed brackets is 4-8, and the included angle between adjacent fixed brackets is equal.

5. The pole piece roll automatic changing mechanism according to claim 3, characterized in that, The receiving assembly includes a rotating arm, which is rotatably connected to the frame via a rotating shaft. The drum is located within the rotation range of the rotating arm. The rotating arm is equipped with a cutter, a pressure roller, and a pushing cylinder. The pushing cylinder is drively connected to the pressure roller and pushes the pressure roller to move towards the drum. The frame is equipped with a limiting block, which is located within the rotation range of the rotating arm.

6. The pole piece roll automatic changing mechanism according to claim 3, wherein The feeding assembly includes multiple guide rollers and tension rollers. The guide rollers are rotatably connected to the frame. One of the guide rollers is connected to the frame via a rotating arm. The tension roller is rotatably connected to the frame. The rotating arm is rotatably connected to the frame. The rotating arm is driven to rotate by a tension output cylinder. The tension roller is used to detect the electrode tension, and the tension output cylinder is used to provide the electrode tension. The electrode sheet is pulled from the discharge direction to the rewinding assembly via a roller, or the roll is pulled from the rewinding assembly to the feed direction via a roller.

7. The pole piece roll automatic changing mechanism according to claim 6, characterized in that, The feeding assembly is also provided with a receiving platform, which is connected to the frame, and the roller traction electrode passes through the receiving platform.

8. The pole piece roll automatic changing mechanism according to claim 6, characterized in that, The feeding assembly includes a correction sensor, which is connected to the frame, and the roller traction electrode passes through the correction sensor.

9. The pole piece roll automatic changing mechanism according to claim 1, characterized by, The feeding direction is provided with an AGV loading area, which is located between the roll changing assembly and the feeding assembly. The AGV loading area is equipped with an AGV trolley.

10. A battery electrode sheet production line characterized by, The pole piece roll automatic changing mechanism as claimed in any one of claims 1-9, further comprising a coating mechanism and a rolling mechanism, the pole piece roll automatic changing mechanism being located between the coating mechanism and the rolling mechanism, and being used for the transportation and preloading of the pole piece between the coating mechanism and the rolling mechanism, the coating mechanism being located in the discharging direction of the pole piece roll automatic changing mechanism, and the rolling mechanism being located in the feeding direction of the pole piece roll automatic changing mechanism.

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