Pole piece winding anti-wrinkle device and pole piece production equipment

Abstract

This utility model relates to the field of battery electrode production technology, and discloses an electrode winding anti-wrinkle device and electrode production equipment, including: a support base; a roller shaft disposed on the support base; and a follower roller rotatably sleeved on the roller shaft, suitable for supporting the bottom of the electrode. The first and / or second ends of the follower roller are provided with annular grooves. This device is suitable for installation between a traction mechanism and a winding mechanism. By supporting the bottom of the electrode with the follower roller, it improves the problem of uneven tension distribution in different areas during transmission, ensures the tension stability of the electrode during high-speed operation, prevents the electrode from shaking, and the annular groove at the end of the follower roller can accommodate powder falling from the edge of the electrode, eliminating local protrusions caused by powder accumulation. The tension distribution at the edge of the electrode is more uniform, reducing appearance defects such as wrinkles and warping of the electrode, improving the overall flatness and process adaptability of the electrode, improving the electrode processing quality, ensuring the consistency of subsequent cell assembly, and the safety of battery products.

Description

Technical Field

[0001] This utility model relates to the field of battery electrode production technology, specifically to an electrode winding and anti-wrinkle device and electrode production equipment. Background Technology

[0002] In the production process of lithium-ion battery electrodes, after the coating process is completed, the electrodes need to be conveyed and guided by the traction mechanism and finally wound into regular rolls by the winding mechanism.

[0003] However, for multi-coated electrodes—that is, electrodes with multiple independent coated widths distributed side by side on a single substrate—the following problems exist during the winding process: Due to variations in coating precision, incoming electrode sheets are prone to localized arc-shaped deformation. This morphological defect directly leads to uneven tension distribution across different areas of the electrode sheet during the traction and transport stage. In the subsequent winding process, unstable tension causes powder to fall off the electrode sheet edges, resulting in powder accumulation and localized protrusions, which in turn causes electrode sheet wrinkles. Ultimately, this affects the consistency of cell assembly and the safety of the battery product. Utility Model Content

[0004] This utility model provides an electrode winding anti-wrinkle device and electrode production equipment to solve or improve the problem in related technologies where multi-width coated electrodes may have local arcs due to differences in coating precision, resulting in uneven tension distribution in different areas of the electrode during transmission. This leads to powder shedding at the electrode edges and causing electrode wrinkles in the subsequent winding process, ultimately affecting the consistency of cell assembly and the safety of battery products.

[0005] In a first aspect, this utility model provides an electrode winding and anti-wrinkle device, comprising: Support base; A roller is mounted on the support body; A follower roller is rotatably mounted on the roller shaft. The follower roller is adapted to be supported on the bottom of the electrode sheet. The first end and / or the second end of the follower roller is provided with an annular groove.

[0006] In one alternative embodiment, at the same end of the follower roller, there are at least two annular grooves, and each annular groove is spaced apart along the axial direction of the follower roller.

[0007] In one alternative embodiment, the follower roller has a spiral groove in the middle.

[0008] In one alternative implementation, it further includes: A pair of limiting rings are sleeved on the roller shaft and respectively disposed at both ends of the follower roller. The pair of limiting rings are used to limit the axial displacement of the follower roller.

[0009] In one alternative embodiment, the support body includes: A pair of fixed supports are disposed opposite to each other at both ends of the roller shaft; A pair of bearing seats are disposed opposite to each other at both ends of the roller shaft. The bearing seats are used to connect the roller shaft. The bearing seats are slidably connected to the fixed bracket and slide along a first direction. A lifting mechanism is used to drive a pair of said bearings to slide along the first direction.

[0010] In one optional implementation, the lifting mechanism includes: A pair of lifting components are respectively disposed at both ends of the roller shaft and correspond one-to-one with a pair of shaft seats. The lifting components are used to drive the shaft seats to slide along the first direction.

[0011] In one optional implementation, the lifting assembly includes: A lead screw is rotatably mounted on the fixed bracket and extends along the first direction. The bearing seat is provided with a threaded hole adapted to the lead screw, and the lead screw is threadedly connected to the threaded hole. A guide rod is disposed on the fixed bracket and extends along the first direction. The bearing seat is slidably connected to the guide rod and slides along the guide rod.

[0012] In one optional implementation, the lifting assembly further includes: A pair of fixing members are connected to the fixing bracket and are respectively disposed at both ends of the guide rod. The fixing members are provided with mounting holes, and the lead screw is rotatably disposed in the mounting holes.

[0013] In one optional embodiment, the fixing bracket includes: Base; A support column is disposed on the base and extends along the first direction; the bearing seat is slidably connected to the support column; and the lifting mechanism is disposed on the support column. The reinforcing ribs are connected to the base and the support column, respectively.

[0014] In one alternative embodiment, the bearing includes: A sliding member is slidably connected to the fixed bracket and slides along the first direction; the lifting mechanism is used to drive a pair of the sliding members to slide along the first direction. The first retaining ring is disposed on the side of the sliding member facing the roller shaft; The second retaining ring is disposed opposite to the first retaining ring and is detachably connected. The first retaining ring and the second retaining ring are used to clamp the roller shaft.

[0015] Secondly, this utility model also provides an electrode production equipment, including an electrode winding and anti-wrinkle device as described in any of the above claims.

[0016] The electrode winding anti-wrinkle device provided by this utility model is suitable for installation between the traction mechanism and the winding mechanism. It supports the bottom of the electrode by rolling a follower roller, which improves the problem of uneven tension distribution in different areas during transmission, ensures the tension stability of the electrode during high-speed operation, and prevents the electrode from shaking. In addition, the end of the follower roller is provided with an annular groove, which can accommodate powder falling from the edge of the electrode, eliminate local bulges caused by powder accumulation, and make the tension distribution at the edge of the electrode more uniform. This significantly reduces appearance defects such as wrinkles and warping of the electrode, improves the overall flatness and process adaptability of the electrode, improves the electrode processing quality, and ensures the consistency of subsequent cell assembly and the safety of battery products. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the electrode winding and anti-wrinkle device according to an embodiment of the present utility model; Figure 2 for Figure 1 A magnified view of part A in the diagram; Figure 3 This is the second schematic diagram of the structure of the electrode winding and anti-wrinkle device according to an embodiment of the present utility model; Figure 4 for Figure 3 A magnified view of part B in the diagram; Figure 5 for Figure 3 A magnified view of part of C; Figure 6 This is a front view of the electrode winding and anti-wrinkle device according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Support body; 101. Fixed bracket; 1011. Base; 1012. Support column; 1013. Reinforcing rib; 102. Shaft seat; 1021. Threaded hole; 1022. Sliding part; 1023. First retaining ring; 1024. Second retaining ring; 103. Lifting mechanism; 1031. Lifting assembly; 10311. Lead screw; 10312. Guide rod; 10313. Fixing part; 10314. Mounting hole; 10315. Grip part; 2. Roller shaft; 3. Follow-up roller; 301. First end; 302. Second end; 303. Annular groove; 304. Spiral groove; 4. Limiting ring; 5. Bearing. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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.

[0023] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] The following is combined with Figures 1 to 6 This invention describes an electrode winding and anti-wrinkle device and electrode production equipment according to embodiments of the present invention.

[0025] According to an embodiment of this utility model, in one aspect, an anti-wrinkle device for electrode winding is provided, suitable for installation between a traction mechanism and a winding mechanism. The device includes a support base 1, a roller 2, and a follower roller 3. Specifically, as... Figure 1 As shown, roller 2 is mounted on support 1. Follower roller 3 is rotatably mounted on roller 2. Optionally, as shown... Figure 5 As shown, the follower roller 3 and the roller shaft 2 are rotatably connected by a bearing 5. The follower roller 3 is suitable for supporting the bottom of the electrode sheet, and can accurately match the tension of each area of ​​the multi-width coated electrode sheet, solving the problem of inconsistent arc shape of the incoming material of the multi-width coated electrode sheet. Moreover, during the transmission of the electrode sheet, the follower roller 3 can move with the electrode sheet, which can reduce the friction between the electrode sheet and the follower roller 3.

[0026] like Figure 1 As shown, the first end 301 and / or the second end 302 of the follower roller 3 are provided with an annular groove 303. That is, the contact position between the follower roller 3 and the edge of the electrode is provided with a groove, thereby providing a certain space for the powder falling off the edge of the electrode. Optionally, as Figure 3 As shown, both ends of the follower roller 3 are provided with annular grooves 303. It should be noted that the groove depth, groove width and other parameters of the annular groove 303 can be determined according to the actual design requirements.

[0027] With this configuration, the device is suitable for installation between the traction mechanism and the winding mechanism. It is supported at the bottom of the electrode by the rolling support roller 3, which improves the problem of uneven tension distribution in different areas during transmission, ensures the tension stability of the electrode during high-speed operation, and prevents the electrode from shaking. In addition, the end of the rolling support roller 3 is provided with an annular groove 303, which can accommodate the powder falling from the edge of the electrode, eliminate the local protrusion caused by powder accumulation, and make the tension distribution at the edge of the electrode more uniform. This greatly reduces appearance defects such as wrinkles and warping of the electrode, improves the overall flatness and process adaptability of the electrode, improves the processing quality of the electrode, and ensures the consistency of subsequent cell assembly and the safety of battery products.

[0028] Optionally, in some embodiments of this utility model, such as Figure 3 As shown, at the same end of the follower roller 3, there are at least two annular grooves 303, and each annular groove 303 is spaced apart along the axial direction of the follower roller 3. It should be noted that the spacing and other parameters of the annular grooves 303 can be determined according to the actual design requirements. With this arrangement, multiple accommodating structures are formed by the annular grooves 303 spaced apart along the axial direction, which greatly reduces the local bulging of the electrode sheet caused by powder accumulation, laying the foundation for uniform tension transmission in the subsequent process.

[0029] Optionally, in some embodiments of this utility model, such as Figure 3 As shown, a spiral groove 304 is provided in the middle of the follower roller 3. It should be noted that the groove depth, groove width, and pitch of the spiral groove 304 can be determined according to the actual design requirements. With this setting, the spiral groove 304 can effectively guide the trace amounts of trapped gas generated during the contact and bonding process between the electrode sheet and the follower roller 3, avoiding abnormal fluctuations in local tension during the electrode sheet transmission caused by the formation of a local air cushion layer on the contact surface, thereby significantly reducing the probability of electrode sheet wrinkling defects.

[0030] Optionally, in some embodiments of this utility model, such as Figure 6 As shown, the electrode winding anti-wrinkle device also includes a pair of limiting rings 4, which are respectively disposed at both ends of the follower roller 3. The pair of limiting rings 4 are used to limit the axial displacement of the follower roller 3. Figure 5 As shown, the limiting ring 4 is fixedly sleeved on the roller shaft 2. Optionally, the limiting ring 4 can be fixed to the roller shaft 2 by bolts. This setting can effectively suppress the unexpected axial movement of the follower roller 3, ensure that it maintains a stable and reliable contact state with the electrode, thereby avoiding unnecessary lateral friction and preventing electrode wear or coating scratches.

[0031] Optionally, in some embodiments of this utility model, see Figure 1 , Figure 3 and Figure 6As shown, the support body 1 includes a pair of fixed brackets 101, a pair of bearings 102, and a lifting mechanism 103. Specifically, as... Figure 1 As shown, a pair of fixed supports 101 are disposed opposite to each other at both ends of the roller 2. Figure 6 As shown, a pair of bearing seats 102 are disposed opposite to each other at both ends of the roller shaft 2, and the bearing seats 102 are used to connect the roller shaft 2. And as... Figure 3 As shown, the bearing seat 102 is slidably connected to the fixed bracket 101 and slides along a first direction. The lifting mechanism 103 is used to drive the pair of bearing seats 102 to slide along the first direction. It should be noted that, in this embodiment, the first direction is the height direction of the device.

[0032] With this configuration, the lifting mechanism 103 drives the two side bearings 102 to move up and down, thereby synchronously driving the roller 2 and the follower roller 3 to complete the height adjustment. This adapts to the incoming arc shape and local tension differences of different electrode sheets, ensuring the tension stability of the electrode sheets during high-speed operation, improving the problem of electrode sheet wrinkling, and enhancing the ease of use of the device. It also adapts to the production needs of electrode sheets of different specifications and reduces the time required for device changeover and adjustment.

[0033] Optionally, in some embodiments of the present invention, the lifting mechanism 103 may include a lifting component 1031, which is disposed at one end of the roller 2. Specifically, the lifting component 1031 is adapted to drive one of the bearing seats 102 to slide along a first direction, so as to drive the roller 2 to move up and down as a whole, while the other bearing seat 102 slides with the roller 2, thereby achieving smooth up and down movement of the whole.

[0034] Alternatively, in some other embodiments of this utility model, such as Figure 1 As shown, the lifting mechanism 103 includes a pair of lifting components 1031, which are respectively disposed at both ends of the roller 2. Each pair of lifting components 1031 corresponds to a pair of bearing seats 102. The lifting components 1031 are used to drive the bearing seats 102 to slide along a first direction. This arrangement enables independent adjustment of the height at both ends of the roller 2, improving the ease of adjustment and flexibility of use. In particular, for electrode sheets formed by splicing different coating thicknesses during the winding process, independent height adjustment on both sides can precisely adapt to the local tension differences of electrode sheets with different thicknesses on both sides, reducing the generation of electrode wrinkles.

[0035] Optionally, in some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the lifting assembly 1031 includes a lead screw 10311 and a guide rod 10312. The lead screw 10311 is rotatably mounted on the fixed bracket 101, and the lead screw 10311 extends along a first direction. Figure 2As shown, the bearing seat 102 has a threaded hole 1021 adapted to the lead screw 10311, and the lead screw 10311 is threadedly connected to the threaded hole 1021. The guide rod 10312 is disposed on the fixed bracket 101 and extends along a first direction. The bearing seat 102 is slidably connected to the guide rod 10312 and slides along the guide rod 10312.

[0036] It should be noted that by rotating the lead screw 10311, the bearing seat 102 can move up and down along the lead screw 10311, realizing the height adjustment of the follower roller 3. The structure is simple and the operation is convenient. Moreover, the guide rod 10312 can limit and guide the bearing seat 102, ensuring the stability and reliability of the bearing seat 102's movement in the first direction. Optionally, there can be two guide rods 10312, respectively set on both sides of the lead screw 10311. Through the synergistic effect of the symmetrical double guide rods 10312 and the lead screw 10311, the adjustment accuracy is improved and the problem of uneven force on one side of the guide is alleviated. The end of the lead screw 10311 can also be provided with a gripping part 10315 for easy manual operation.

[0037] Optionally, in some embodiments of this utility model, such as Figure 4 As shown, the lifting assembly 1031 also includes a pair of fixing members 10313, which are respectively connected to the fixed bracket 101, for example, by bolt connection. The pair of fixing members 10313 are respectively disposed at both ends of the guide rod 10312, and each fixing member 10313 has a mounting hole 10314, in which the lead screw 10311 is rotatably disposed. This arrangement allows the lifting assembly 1031 to be stably mounted on the fixed bracket 101, ensuring the coordinated action of all components, achieving precise matching of guidance and transmission, and improving the reliability of the assembly's operation.

[0038] In addition, in some other embodiments, the lifting assembly 1031 may also employ a linear drive mechanism such as an electric telescopic rod or an electric cylinder. Specifically, taking an electric telescopic rod as an example, the electric telescopic rod is mounted on the fixed bracket 101, and its telescopic end is connected to the shaft seat 102 to drive the shaft seat 102 to move up and down along the first direction, thereby realizing the height adjustment of the follower roller 3.

[0039] Optionally, in some embodiments of this utility model, such as Figure 1As shown, the fixed bracket 101 includes a base 1011, a support column 1012, and reinforcing ribs 1013. Specifically, the support column 1012 is disposed on the base 1011, for example, by welding. The support column 1012 extends along a first direction, and optionally, the support column 1012 can be made of channel steel. The bearing seat 102 is slidably connected to the support column 1012, and the lifting mechanism 103 is disposed on the support column 1012. The reinforcing ribs 1013 are connected to the base 1011 and the support column 1012 respectively, for example, by welding. This arrangement forms a stable support structure, enhances the stability of the overall device, avoids adjustment failures caused by equipment vibration, and reduces the generation of electrode powder shedding, wrinkles, etc.

[0040] Optionally, in some embodiments of this utility model, such as Figure 2 As shown, the bearing seat 102 includes a slider 1022, a first retaining ring 1023, and a second retaining ring 1024. For details, see [link to documentation]. Figure 1 and Figure 2 The sliding member 1022 is slidably connected to the fixed bracket 101, and the sliding member 1022 slides along a first direction. The lifting mechanism 103 is used to drive a pair of sliding members 1022 to slide along the first direction. Optionally, the lifting assembly 1031 and the sliding member 1022 are arranged in a one-to-one correspondence. Wherein, the first direction is parallel or coaxial with the vertical axis of the fixed bracket 101, and the sliding member 1022 sliding along the first direction means that the sliding member 1022 slides up or down along a straight line parallel or coaxial with the vertical axis of the fixed bracket 101.

[0041] The first retaining ring 1023 is disposed on the side of the sliding member 1022 facing the roller shaft 2, and the second retaining ring 1024 is disposed opposite to the first retaining ring 1023 and detachably connected. The first retaining ring 1023 and the second retaining ring 1024 are used to clamp the roller shaft 2. Optionally, the first retaining ring 1023 and the second retaining ring 1024 can be connected by bolts. This arrangement facilitates the disassembly and assembly of the roller shaft 2, simplifies the disassembly, assembly, and maintenance process of the overall device, effectively shortens the equipment downtime for maintenance, and significantly improves the equipment's uptime.

[0042] According to an embodiment of the present invention, another aspect is provided: an electrode production apparatus, including the electrode winding and anti-wrinkle device as described in the various embodiments above. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the electrode winding and anti-wrinkle device described above, and therefore will not be repeated here.

[0043] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A device for preventing wrinkles during electrode winding, characterized in that, include: Support base (1); Roller (2) is mounted on the support body (1); The follower roller (3) is rotatably mounted on the roller shaft (2). The follower roller (3) is adapted to be supported on the bottom of the electrode sheet. The first end (301) and / or the second end (302) of the follower roller (3) are provided with an annular groove (303).

2. The electrode winding and anti-wrinkle device according to claim 1, characterized in that, At the same end of the follower roller (3), there are at least two annular grooves (303), and each annular groove (303) is spaced apart along the axial direction of the follower roller (3).

3. The electrode winding and anti-wrinkle device according to claim 1, characterized in that, The follower roller (3) has a spiral groove (304) in the middle.

4. The electrode winding and anti-wrinkle device according to any one of claims 1 to 3, characterized in that, Also includes: A pair of limiting rings (4) are sleeved on the roller shaft (2) and respectively set at both ends of the follower roller (3). The pair of limiting rings (4) are used to limit the axial displacement of the follower roller (3).

5. The electrode winding and anti-wrinkle device according to any one of claims 1 to 3, characterized in that, The support base (1) includes: A pair of fixed brackets (101) are disposed opposite to each other at both ends of the roller (2); A pair of bearing seats (102) are disposed opposite to each other at both ends of the roller (2). The bearing seats (102) are used to connect the roller (2). The bearing seats (102) are slidably connected to the fixed bracket (101) and slide along a first direction. The lifting mechanism (103) is used to drive a pair of said bearings (102) to slide along the first direction.

6. The electrode winding and anti-wrinkle device according to claim 5, characterized in that, The lifting mechanism (103) includes: A pair of lifting components (1031) are respectively disposed at both ends of the roller (2) and correspond one-to-one with a pair of bearing seats (102). The lifting components (1031) are used to drive the bearing seats (102) to slide along the first direction.

7. The electrode winding and anti-wrinkle device according to claim 6, characterized in that, The lifting assembly (1031) includes: A lead screw (10311) is rotatably mounted on the fixed bracket (101) and extends along the first direction. The bearing seat (102) is provided with a threaded hole (1021) that is adapted to the lead screw (10311). The lead screw (10311) is threadedly connected to the threaded hole (1021). The guide rod (10312) is disposed on the fixed bracket (101) and extends along the first direction. The bearing seat (102) is slidably connected to the guide rod (10312) and slides along the guide rod (10312).

8. The electrode winding and anti-wrinkle device according to claim 7, characterized in that, The lifting assembly (1031) also includes: A pair of fixing members (10313) are connected to the fixing bracket (101) and are respectively disposed at both ends of the guide rod (10312). The fixing member (10313) is provided with a mounting hole (10314), and the lead screw (10311) is rotatably disposed in the mounting hole (10314).

9. The electrode winding and anti-wrinkle device according to claim 5, characterized in that, The fixed bracket (101) includes: Base (1011); A support column (1012) is disposed on the base (1011) and extends along the first direction; the bearing seat (102) is slidably connected to the support column (1012); and the lifting mechanism (103) is disposed on the support column (1012). The reinforcing rib (1013) is connected to the base (1011) and the support column (1012) respectively.

10. The electrode winding and anti-wrinkle device according to claim 5, characterized in that, The bearing seat (102) includes: The sliding member (1022) is slidably connected to the fixed bracket (101) and slides along the first direction. The lifting mechanism (103) is used to drive the pair of sliding members (1022) to slide along the first direction. The first retaining ring (1023) is disposed on the side of the sliding member (1022) facing the roller (2); The second retaining ring (1024) is disposed opposite to the first retaining ring (1023) and is detachably connected. The first retaining ring (1023) and the second retaining ring (1024) are used to clamp the roller shaft (2).

11. An electrode production equipment, characterized in that, Includes the electrode winding anti-wrinkle device as described in any one of claims 1 to 10.

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