Step roller and rolling device
By designing a step roller that can accurately adjust the step height during the battery production process, the problem of the white space area of the electrode sheet coating is not extended by the roll pressure, improving the uniformity of the electrode sheet extension and reducing wrinkle situations.
Patent Information
- Application Number
- CN202520054024.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2035-01-10
AI Technical Summary
During the battery production process, the coating blank area of the electrode sheet is not extended by pressure when rolling, resulting in a different ductility than the coating area, which in turn causes the problem of wrinkling of the electrode sheet. The prior art forms steps on the pressing roller surface by attaching TFL, but there are defects such as skew, inaccurate height adjustment and unstable pasting.
A step roller is designed, including a press roller body, a driving assembly and a step. The steps are distributed in an annular array along the rotation axis of the press roller body. The drive assembly drives the step unit to move closer to the center or diffuses to the outer circumference, and accurately adjusts the outer diameter of the step, thereby adjusting the height of the step.
It realizes accurate adjustment of step height, improves the extension consistency of the pole piece, reduces the wrinkle of the pole piece, and avoids the defect of TFL sticking.
Smart Images
Figure CN222628708U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery production equipment, in particular to a step roller and a rolling device. Background Art
[0002] During the battery production process, the coated pole piece needs to be rolled to compact the coating layer to meet the process and product requirements. Because the pole piece is not cut during rolling, the height of the coated blank area of the pole piece is lower than the coated area, resulting in the pole piece's coated blank area not being stretched by the rolling pressure, forming a difference in the stretch rate with the coated area of the pole piece, which leads to wrinkling of the pole piece.
[0003] To solve this problem, a step is added to the roller corresponding to the white area of the electrode to extend the white area of the electrode coating. In the related technology, steps are formed on the roller surface by sticking TFL (Polytetrafluoroethylene, generally called "non-stick coating" or easy-to-clean material). However, there are defects such as easy skewness during the TFL sticking process, the step height can only be adjusted by the number of TFL sticking layers, and the TFL is not firmly stuck during use and falls off, and the step height cannot be accurately adjusted. Utility Model Content
[0004] In view of the above problems, the present application provides a step roller and a rolling device, aiming to provide a step roller that can accurately adjust the step height.
[0005] The present application provides a step roller, comprising a roller body, a drive assembly and a step; the roller body has an avoidance area, the avoidance area is used to correspond to the coating blank area of the electrode; the drive assembly is arranged on the roller body; the step is transmission connected to the drive assembly and is located in the avoidance area; the step comprises at least two step units, at least two step units are distributed in a ring array along the rotation axis of the roller body, and the drive assembly drives at least two step units to move toward the center, or drives at least two step units to spread toward the periphery, so as to adjust the outer diameter of the step.
[0006] In the technical solution of the embodiment of the present application, the technical solution of the utility model is to set a step in the avoidance area of the roller body corresponding to the electrode coating blank area, and the step is designed to be at least two step units distributed in a circular array along the rotation axis of the roller body. The drive assembly can drive at least two step units to move closer to the center, or drive at least two step units to spread to the periphery, so that the outer diameter of the step can be accurately adjusted as needed, that is, the height of the step can be accurately adjusted to improve the consistency of the electrode extension and reduce the wrinkling of the electrode. Therefore, this solution replaces the method of forming steps on the roller surface by pasting TFL, avoiding the defects of easy skewness during the TFL pasting process, the step height can only be adjusted by the number of TFL pasting layers, and the TFL is not firmly pasted and falls off during use.
[0007] In some embodiments, the driving assembly includes a mounting frame and at least two piston rods; the mounting frame is arranged in the roller body; at least two piston rods are arranged in the mounting frame and can reciprocate along the radial direction of the roller body, and each piston rod is connected to a step unit to drive at least two step units to move closer to the center, or drive at least two step units to spread outward. With such a design, the at least two step units are driven to move closer to the center, that is, to move in a direction close to the rotation axis of the roller body, or the at least two step units are driven to spread outward, that is, to move in a direction away from the rotation axis of the roller body, under the movement of the at least two piston rods. The height of the at least two step units can be precisely controlled as needed, that is, the height of the step can be precisely controlled.
[0008] In some embodiments, the mounting frame is provided with a first pressure chamber, a second pressure chamber and at least two mounting grooves; the mounting groove extends along the radial direction of the roller body and connects the first pressure chamber and the second pressure chamber; the first pressure chamber and the second pressure chamber are hydraulic chambers or pneumatic chambers; each piston rod is installed in a mounting groove. With such a design, when the height of the step needs to be lowered, the medium can be introduced into the first pressure chamber, and the second pressure chamber outputs the medium, so as to adjust the positions of at least two piston rods under the pressure of the medium, and finally drive at least two step units to move closer to the center under the movement of at least two piston rods; when the height of the step needs to be increased, the medium can be introduced into the second pressure chamber, and the first pressure chamber outputs the medium, so as to adjust the positions of at least two piston rods under the pressure of the medium, and finally drive at least two step units to diffuse to the periphery under the movement of at least two piston rods. Therefore, the piston rod can be driven to move more smoothly under the action of hydraulic pressure or pneumatic pressure, and the height of the step can be adjusted more smoothly.
[0009] In some embodiments, the piston rod sleeve is provided with a sealing ring, which abuts against the groove wall of the installation groove to divide the installation groove into a first groove body and a second groove body, the first groove body is connected to the first pressure chamber, and the second groove body is connected to the second pressure chamber. In such a design, the design of the sealing ring can divide the installation groove into a first groove body and a second groove body that are not connected to each other, so as to avoid the first pressure chamber and the second pressure chamber being connected to each other and affecting the hydraulic or pneumatic effect. When the medium enters the first pressure chamber, the medium enters the first groove body through the first pressure chamber, and then pushes the corresponding piston rod to move, and at the same time, the medium in the second groove body flows to the second pressure chamber, and then is output from the second pressure chamber; when the medium enters the second pressure chamber, the medium enters the second groove body through the second pressure chamber, and then pushes the corresponding piston rod to move, and at the same time, the medium in the first groove body flows to the first pressure chamber, and then is output from the first pressure chamber.
[0010] In some embodiments, the piston rod is further provided with a limiting ring, and the groove wall of the installation groove is provided with a limiting boss, and the limiting ring cooperates with the limiting boss. With such a design, when the piston rod is moving, when the limiting ring on the piston rod abuts against the limiting boss on the groove wall of the installation groove, the piston rod will no longer move. At this time, the outer diameter of the step is the largest, that is, the height of the step is the highest, so that the maximum limiting position of the piston rod can be determined under the limiting cooperation between the limiting ring and the limiting boss, so as to determine the maximum ring gap, and avoid the problem of wrinkling of the pole piece due to excessive ring gap.
[0011] In some embodiments, the first pressure chamber is annular and close to the outer periphery of the mounting frame, and the second pressure chamber is arranged in the middle of the mounting frame. With such a design, when the medium is introduced into the first pressure chamber and the medium is output from the second pressure chamber, the piston rod can be better pushed to move in the direction close to the rotation axis of the roller body under the pressure of the medium; and when the medium is introduced into the second pressure chamber and the medium is output from the first pressure chamber, the piston rod can be better pushed to move in the direction away from the rotation axis of the roller body under the pressure of the medium.
[0012] In some embodiments, the mounting frame is connected to a first connecting pipe and a second connecting pipe, the first connecting pipe is connected to the first pressure chamber, and the second connecting pipe is connected to the second pressure chamber. With such a design, the medium can be supplied to the first pressure chamber through the first connecting pipe, or the medium of the first pressure chamber can be output from the first connecting pipe; and the medium can be supplied to the second pressure chamber through the second connecting pipe, or the medium of the second pressure chamber can be output from the second connecting pipe.
[0013] In some embodiments, the avoidance area is an avoidance opening, which extends along the circumference of the roller body to divide the roller body into two sections, and both sections of the roller body are connected to the mounting frame. Such a design of the avoidance opening makes it easier to install the mounting frame and the piston rod inside the roller body, and by connecting the two sections of the roller body to the mounting frame, the two sections of the roller body can achieve synchronous rotation.
[0014] In some embodiments, the step includes a plurality of sub-steps, which are sequentially distributed along the length of the roller body, and each sub-step includes at least two step units. In this design, by designing the step into a plurality of independent sub-steps, the width of the total step surface can be controlled by controlling the movement of the plurality of sub-steps, thereby achieving adjustable step width. Therefore, the step roller can not only adjust the height of the step through the drive assembly, but also adjust the width of the total step through the height adjustment of the plurality of sub-steps, thereby meeting different product requirements, improving the consistency of pole piece extension, reducing pole piece wrinkling, and improving the collapse of the pole ear.
[0015] In some embodiments, the roller body is provided with at least two avoidance areas, each of which is used to correspond to a coating blank area of the pole piece, and each avoidance area is provided with a driving component and a step. With such a design, a corresponding number of avoidance areas can be provided on the roller body according to the number of coating blank areas of the pole piece, so that a step with a precisely adjustable height can be provided in the corresponding avoidance area.
[0016] The present application also provides a rolling device, comprising the above-mentioned step roller.
[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0019] Figure 1 This is a schematic structural diagram of an embodiment of a step roller of the present application;
[0020] Figure 2 This is a cross-sectional view of an embodiment of a step roller of the present application;
[0021] Figure 3 This is a cross-sectional view of a driving assembly and a step in an embodiment of a step roller of the present application;
[0022] Figure 4 This is a schematic structural diagram of another embodiment of the step roller of the present application.
[0023] Description of Figure Numbers:
[0024]
[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0026] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.
[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.
[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0030] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).
[0031] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.
[0032] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0033] As a new type of secondary battery, lithium-ion battery has the advantages of high energy density and power density, high operating voltage, light weight, small size, long cycle life, good safety, and green environmental protection. It has broad application prospects in portable appliances, power tools, large-scale energy storage, electric transportation power supply, etc.
[0034] During the battery production process, the coated pole piece needs to be rolled to compact the coating layer to meet the process and product requirements. Because the pole piece is not cut during rolling, the height of the coated blank area of the pole piece is lower than the coated area, resulting in the pole piece's coated blank area not being stretched by the rolling pressure, forming a difference in the stretch rate with the coated area of the pole piece, which leads to wrinkling of the pole piece.
[0035] To solve this problem, a step is added to the roller corresponding to the white area of the electrode to extend the white area of the electrode coating. In the related technology, steps are formed on the roller surface by sticking TFL (Polytetrafluoroethylene, generally called "non-stick coating" or easy-to-clean material). However, there are defects such as easy skewness during the TFL sticking process, the step height can only be adjusted by the number of TFL sticking layers, and the TFL is not firmly stuck during use and falls off, and the step height cannot be accurately adjusted.
[0036] Based on the above problems, the utility model proposes a step roller 100 , aiming to provide a step roller 100 that can accurately adjust the height of the step 30 .
[0037] See also Figures 1 to 3 In one embodiment of the utility model, the step roller 100 includes a roller body 10, a drive assembly 20 and a step 30; the roller body 10 has an avoidance area 10a, and the avoidance area 10a is used to correspond to the coating blank area of the electrode; the drive assembly 20 is arranged on the roller body 10; the step 30 is transmission-connected to the drive assembly 20 and is located in the avoidance area 10a; the step 30 includes at least two step units 31, and the at least two step units 31 are distributed in a ring array along the rotation axis of the roller body 10. The drive assembly 20 drives at least two step units 31 to move toward the center, or drives at least two step units 31 to spread toward the periphery, so as to adjust the outer diameter of the step 30.
[0038] It can be understood that the roller body 10 is a columnar structure, and its interior can be hollow. The avoidance area 10a can be located at the end of the roller body 10, or in the middle of the roller body 10 or other positions, which can be determined according to the coating blank area of the electrode piece. In addition, the number of the avoidance areas 10a can be one or at least two, which can be determined according to the number of coating blank areas of the electrode piece.
[0039] In this embodiment, at least two step units 31 are distributed in an annular array along the rotation axis of the roller body 10, so that an annular gap 311 is formed between two adjacent step units 31. As the height of the step 30 (i.e., the outer diameter of the step 30) changes, the annular gap 311 also changes. When the height of the step 30 reaches the highest position, the annular gap 311 is the largest; when the height of the step 30 reaches the lowest position, the annular gap 311 is the smallest, and the size of the annular gap 311 is equal to 0. Therefore, when designing the step 30, it is necessary to determine the largest annular gap 311 based on the influence of the annular gap 311 on the pole piece wrinkles.
[0040] In practical applications, the step 30 can be divided into two, three, four, five or other multiple arc-shaped step units 31 .
[0041] In actual application, the driving component 20 can be a hydraulic system, a pneumatic system, or a driving system of a motor or a motor in conjunction with other transmission structures, as long as it can drive at least two step units 31 to move toward the center, or drive at least two step units 31 to spread toward the periphery to adjust the outer diameter of the step 30.
[0042] In summary, in the technical solution of the embodiment of the present application, the technical solution of the utility model is to set a step 30 in the avoidance area 10a corresponding to the electrode coating blank area of the roller body 10, and the step 30 is designed to be at least two step units 31 distributed in a circular array along the rotation axis of the roller body 10. The drive assembly 20 can drive at least two step units 31 to move closer to the center, or drive at least two step units 31 to spread outward, so that the outer diameter of the step 30 can be accurately adjusted as needed, that is, the height of the step 30 can be accurately adjusted to improve the consistency of the electrode extension and reduce the wrinkling of the electrode. Therefore, this solution replaces the method of forming the step 30 on the roller surface by pasting TFL, avoiding the defects of easy skewness during the TFL pasting process, the height of the step 30 can only be adjusted by the number of TFL pasting layers, and the TFL is not firmly pasted and falls off during use.
[0043] In one embodiment of the present application, Figures 1 to 3 The driving assembly 20 includes a mounting frame 21 and at least two piston rods 22; the mounting frame 21 is arranged in the roller body 10; at least two piston rods 22 are arranged on the mounting frame 21, and can reciprocate along the radial direction of the roller body 10, each piston rod 22 is connected to a step unit 31 to drive at least two step units 31 to move toward the center, or drive at least two step units 31 to spread toward the periphery.
[0044] In this embodiment, one end of each piston rod 22 is connected to the inner side of a step unit 31 , and the connection can be achieved by bonding, welding, screw connection, etc.
[0045] With such a design, the movement of at least two piston rods 22 can drive at least two step units 31 toward the center, that is, move toward the direction of the rotation axis of the roller body 10, or the movement of at least two piston rods 22 can drive at least two step units 31 to spread outward, that is, move away from the rotation axis of the roller body 10. Therefore, the height of at least two step units 31 can be precisely controlled as needed, that is, the height of the step 30 can be precisely controlled.
[0046] In one embodiment of the present application, Figure 2 The mounting frame 21 is provided with a first pressure chamber 211, a second pressure chamber 212 and at least two mounting grooves 213; the mounting groove 213 extends along the radial direction of the roller body 10 and connects the first pressure chamber 211 and the second pressure chamber 212; the first pressure chamber 211 and the second pressure chamber 212 are hydraulic chambers or pneumatic chambers; each piston rod 22 is installed in a mounting groove 213.
[0047] In this embodiment, when the medium is introduced into the first pressure chamber 211 and the medium is output from the second pressure chamber 212, at least two piston rods 22 drive at least two step units 31 to move toward the center; when the medium is introduced into the second pressure chamber 212 and the medium is output from the first pressure chamber 211, at least two piston rods 22 drive at least two step units 31 to diffuse toward the periphery.
[0048] With such a design, when the height of the step 30 needs to be lowered, a medium can be introduced into the first pressure chamber 211, and the medium can be output from the second pressure chamber 212, so that the positions of at least two piston rods 22 can be adjusted under the pressure of the medium, and finally at least the step unit 31 can be driven to move closer to the center under the movement of at least two piston rods 22; when the height of the step 30 needs to be increased, a medium can be introduced into the second pressure chamber 212, and the medium can be output from the first pressure chamber 211, so that the positions of at least two piston rods 22 can be adjusted under the pressure of the medium, and finally at least two step units 31 can be driven to spread outward under the movement of at least two piston rods 22. Therefore, the piston rod 22 can be driven to move more smoothly under the action of hydraulic pressure or air pressure, and the height of the step 30 can be adjusted more smoothly.
[0049] In actual application, when the first pressure chamber 211 and the second pressure chamber 212 are hydraulic chambers, the medium introduced into the first pressure chamber 211 and the second pressure chamber 212 may be oil, water or other media; when the first pressure chamber 211 and the second pressure chamber 212 are air pressure chambers, the medium introduced into the first pressure chamber 211 and the second pressure chamber 212 may be air, oxygen or other media.
[0050] In one embodiment of the present application, Figure 2The piston rod 22 is sleeved with a sealing ring 221, which abuts against the groove wall of the installation groove 213 to divide the installation groove 213 into a first groove body 2131 and a second groove body 2132. The first groove body 2131 is connected to the first pressure chamber 211, and the second groove body 2132 is connected to the second pressure chamber 212.
[0051] It should be noted that, since the piston rod 22 can move relative to the mounting frame 21 and the sealing ring 221 can also move relative to the mounting frame 21 , the sizes of the first groove body 2131 and the second groove body 2132 are not fixed.
[0052] With such a design, the design of the sealing ring 221 can separate the installation groove 213 into a first groove body 2131 and a second groove body 2132 which are not connected to each other, so as to avoid the first pressure chamber 211 and the second pressure chamber 212 being connected to each other and affecting the hydraulic or pneumatic effect. When the medium enters the first pressure chamber 211, the medium enters the first groove body 2131 through the first pressure chamber 211, and then pushes the corresponding piston rod 22 to move, and at the same time, the medium in the second groove body 2132 flows to the second pressure chamber 212, and then is output from the second pressure chamber 212; when the medium enters the second pressure chamber 212, the medium enters the second groove body 2132 through the second pressure chamber 212, and then pushes the corresponding piston rod 22 to move, and at the same time, the medium in the first groove body 2131 flows to the first pressure chamber 211, and then is output from the first pressure chamber 211.
[0053] In one embodiment of the present application, Figure 2 The piston rod 22 is also provided with a limiting ring 222 , and the groove wall of the mounting groove 213 is provided with a limiting boss 214 , and the limiting ring 222 cooperates with the limiting boss 214 in a limiting manner.
[0054] It should be noted that when designing the step 30 , the maximum ring gap 311 needs to be determined based on the effect of the ring gap 311 on the pole piece wrinkles, so as to determine the maximum limit position of the piston rod 22 under the cooperation of the limit ring 222 and the limit boss 214 .
[0055] With such a design, when the piston rod 22 is moving, when the limiting ring 222 on the piston rod 22 abuts against the limiting boss 214 on the wall of the mounting groove 213, the piston rod 22 will no longer move. At this time, the outer diameter of the step 30 is the largest, that is, the height of the step 30 is the highest. Therefore, the maximum limiting position of the piston rod 22 can be determined under the limiting cooperation of the limiting ring 222 and the limiting boss 214 to determine the maximum ring gap 311, thereby avoiding the problem of wrinkling of the pole piece due to the ring gap 311 being too large.
[0056] In one embodiment of the present application, Figure 2The first pressure chamber 211 is annular and close to the outer periphery of the mounting frame 21 , and the second pressure chamber 212 is disposed in the middle of the mounting frame 21 . That is, the first pressure chamber 211 is located outside the second pressure chamber 212 .
[0057] With such a design, when the medium is introduced into the first pressure chamber 211 and the medium is output from the second pressure chamber 212, the piston rod 22 can be better pushed to move in the direction close to the rotation axis of the roller body 10 under the pressure of the medium; and when the medium is introduced into the second pressure chamber 212 and the medium is output from the first pressure chamber 211, the piston rod 22 can be better pushed to move in the direction away from the rotation axis of the roller body 10 under the pressure of the medium.
[0058] In one embodiment of the present application, Figure 2 The mounting frame 21 is connected to a first connecting pipe 23 and a second connecting pipe 24 . The first connecting pipe 23 is connected to the first pressure chamber 211 , and the second connecting pipe 24 is connected to the second pressure chamber 212 .
[0059] In this embodiment, one end of the first connecting tube 23 is connected to the mounting frame 21 and communicates with the first pressure chamber 211, and the other end of the first connecting tube 23 is used to communicate with an external feeding device; similarly, one end of the second connecting tube 24 is connected to the mounting frame 21 and communicates with the second pressure chamber 212, and the other end of the second connecting tube 24 is used to communicate with an external feeding device.
[0060] Such a design can provide medium to the first pressure chamber 211 through the first connecting pipe 23, or make the medium of the first pressure chamber 211 be output from the first connecting pipe 23; and can provide medium to the second pressure chamber 212 through the second connecting pipe 24, or make the medium of the second pressure chamber 212 be output from the second connecting pipe 24.
[0061] In one embodiment of the present application, Figure 1 The avoidance area 10 a is an avoidance opening, and the avoidance opening extends along the circumference of the roller body 10 to divide the roller body 10 into two sections, and both sections of the roller body 10 are connected to the mounting frame 21 .
[0062] Such a design, which avoids the opening, makes it easier to install the mounting frame 21 and the piston rod 22 inside the roller body 10, and by connecting the two sections of the roller body 10 to the mounting frame 21, the two sections of the roller body 10 can achieve synchronous rotation.
[0063] In one embodiment of the present application, Figure 1 The roller body 10 is provided with at least two avoidance areas 10 a , each avoidance area 10 a is used for corresponding to a coating blank area of the electrode piece, and each avoidance area 10 a is provided with a driving assembly 20 and a step 30 .
[0064] With such a design, a corresponding number of avoidance areas 10 a can be provided on the roller body 10 according to the number of blank coating areas of the electrode sheet, and steps 30 with precisely adjustable heights can be provided in the corresponding avoidance areas 10 a.
[0065] In another embodiment of the present application, Figure 4 The step 30 includes a plurality of sub-steps 30 a , and the plurality of sub-steps 30 a are sequentially distributed along the length of the roller body 10 , and each sub-step 30 a includes at least two step units 31 .
[0066] Such a design, by designing the step 30 into multiple independent sub-steps 30a, can control the width of the total step 30 surface by controlling the movement of the multiple sub-steps 30a, thereby achieving adjustable width of the step 30. Therefore, the step roller 100 can not only achieve height adjustment of the step 30 through the drive component 20, but also achieve width adjustment of the total step 30 by adjusting the height of the multiple sub-steps 30a, so as to meet different product requirements, improve the consistency of pole piece extension, reduce pole piece wrinkling and improve the collapse of the pole ear.
[0067] In one embodiment, when the step 30 includes 12 sub-steps 30a and the width of each sub-step 30a is 2 mm, the 6 sub-steps 30a on one side can be controlled to move in a direction away from the rotation axis of the roller body 10. In this case, the width of the total step 30 is the width of the 6 sub-steps 30a, that is, 12 mm; or, the 3 sub-steps 30a on one side can be controlled to move in a direction away from the rotation axis of the roller body 10. In this case, the width of the total step 30 is the width of the 3 sub-steps 30a, that is, 9 mm, and so on. The width of the step 30 can be adjusted.
[0068] The utility model also proposes a rolling device, which includes a step roller 100. The specific structure of the step roller 100 refers to the above embodiment. Since the rolling device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the rolling device can also include a bracket and a driver, the step roller 100 and the driver are installed on the bracket, and the driver is used to drive the step roller 100 to rotate.
[0069] According to some embodiments of the present application, the present application provides a step roller 100, in combination with reference to Figures 1 to 4The step roller 100 includes a roller body 10, a drive assembly 20 and a step 30; the roller body 10 has an avoidance area 10a, and the avoidance area 10a is used to correspond to the coating blank area of the electrode; the drive assembly 20 is arranged on the roller body 10; the step 30 is connected to the drive assembly 20 by transmission and is located in the avoidance area 10a; the step 30 includes at least two step units 31, and at least two step units 31 are distributed in a ring array along the rotation axis of the roller body 10, and the drive assembly 20 drives at least two step units 31 to move toward the center, or drives at least two step units 31 to spread toward the periphery, so as to adjust the outer diameter of the step 30. Among them, the step 30 can be applied with a plurality of sub-steps 30a, and the plurality of sub-steps 30a are distributed in sequence along the length of the roller body 10, and each sub-step 30a includes at least two step units 31.
[0070] In the technical solution of the embodiment of the present application, the technical solution of the utility model is to set a step 30 in the avoidance area 10a corresponding to the electrode coating blank area of the roller body 10, and the step 30 is designed to be at least two step units 31 distributed in a ring array along the rotation axis of the roller body 10. The drive assembly 20 can drive at least two step units 31 to move closer to the center, or drive at least two step units 31 to spread outward, so that the outer diameter of the step 30 can be accurately adjusted as needed, that is, the height of the step 30 can be accurately adjusted; and by designing the step 30 into a plurality of independent sub-steps 30a, the width of the total step 30 surface can be controlled by controlling the movement of the plurality of sub-steps 30a, so as to achieve adjustable width of the step 30. Therefore, the step roller 100 can not only achieve height adjustment of the step 30 through the drive assembly 20, but also achieve width adjustment of the total step 30 through height adjustment of the plurality of sub-steps 30a, so as to meet different product requirements, improve the consistency of electrode extension, reduce electrode wrinkling and improve the collapse of the pole ear. Therefore, this solution replaces the method of forming the step 30 on the pressure roller surface by sticking TFL, avoiding the defects such as easy skewness during the TFL sticking process, the height of the step 30 can only be adjusted by the number of TFL sticking layers, and the TFL falling off due to loose sticking during use.
[0071] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A step roller, characterized in that: include: A pressing roller body, wherein the pressing roller body has an avoidance area, and the avoidance area is used to correspond to the coating blank area of the electrode piece; A driving assembly, wherein the driving assembly is arranged on the pressing roller body; a step, the step being drivingly connected to the driving assembly and being located in the avoidance area; The step includes at least two step units, and at least two of the step units are distributed in a circular array along the rotation axis of the pressure roller body. The driving component drives at least two of the step units to move toward the center, or drives at least two of the step units to spread toward the periphery to adjust the outer diameter of the step.
2. The step roller according to claim 1, characterized in that: The drive assembly comprises: A mounting frame, the mounting frame is arranged in the pressing roller body; At least two piston rods are arranged on the mounting frame and can reciprocate along the radial direction of the pressure roller body. Each of the piston rods is connected to a step unit to drive at least two step units to move toward the center or drive at least two step units to spread toward the periphery.
3. The step roller according to claim 2, characterized in that: The mounting frame is provided with a first pressure chamber, a second pressure chamber and at least two mounting grooves; The mounting groove extends along the radial direction of the pressure roller body and communicates with the first pressure chamber and the second pressure chamber; The first pressure chamber and the second pressure chamber are hydraulic chambers or pneumatic chambers; Each of the piston rods is installed in one of the installation grooves.
4. The step roller according to claim 3, characterized in that: The piston rod sleeve is provided with a sealing ring, and the sealing ring abuts against the groove wall of the installation groove to divide the installation groove into a first groove body and a second groove body; The first slot body is communicated with the first pressure chamber, and the second slot body is communicated with the second pressure chamber.
5. The step roller according to claim 3, characterized in that: The piston rod is also provided with a limiting ring, the groove wall of the installation groove is provided with a limiting boss, and the limiting ring is limitedly matched with the limiting boss.
6. The step roller according to claim 3, characterized in that: The first pressure chamber is annular and close to the outer periphery of the mounting frame, and the second pressure chamber is arranged in the middle of the mounting frame.
7. The step roller according to claim 3, characterized in that: The mounting frame is connected with a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is communicated with the first pressure chamber, and the second connecting pipe is communicated with the second pressure chamber.
8. The step roller according to claim 2, characterized in that: The avoidance area is a avoidance opening, and the avoidance opening extends along the circumference of the pressure roller body to divide the pressure roller body into two sections, and the two sections of the pressure roller body are both connected to the mounting frame.
9. The step roller according to any one of claims 1 to 8, characterized in that: The steps include: A plurality of sub-steps are sequentially distributed along the length of the pressing roller body, and each of the sub-steps includes at least two step units.
10. The step roller according to any one of claims 1 to 8, characterized in that: The pressing roller body is provided with at least two avoidance areas, each of which is used to correspond to a coating blank area of the pole piece, and each of which is provided with a driving component and a step.
11. A rolling device, characterized in that: The invention comprises the step roller according to any one of claims 1 to 10.