Extension device for improving rolling through roller

Abstract

The utility model discloses an improved extension device of a rolling passing roller, the passing roller is used in a pole piece rolling device, an annular boss is arranged on a roller body unit along the circumferential direction, and the arrangement position of the boss in the passing roller corresponds to the blank position of a pole piece. The position of the boss corresponds to the blank position of the pole piece, so that the extension rate of the blank position can be increased, the extension consistency of the blank position and the dressing position can be improved, the pole piece can be effectively prevented from being wrinkled and broken, and crow's feet and the like of the rolled pole piece are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pole piece rolling devices, in particular to a rolling over roller extension improving device. Background Art

[0002] Lithium-ion batteries are widely used in various industries due to their high energy density, long service life, and environmental friendliness. Positive and negative electrodes are the primary components of lithium-ion batteries. The electrodes are divided into a material area and a foil area. During rolling, the material area is pressed against the upper and lower rollers, while the foil area is suspended. As a result, the electrode in the material area stretches under pressure, while the foil stretches very little. This can lead to severe wrinkling of the foil at the contact area between the foil area and the foil area, and can easily cause breakage.

[0003] Currently, wrinkles are usually reduced by applying Teflon tape to the rollers to increase the height and stretch the foil. However, this method is difficult to effectively eliminate wrinkles on the electrode due to inconsistent Teflon tape thickness and poor adhesion, and the operation is time-consuming and labor-intensive. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a roller-over-roller extension improvement device.

[0005] The utility model proposes a roller-over-roller extension improvement device, which includes a roller unit. The outer side wall of the roller unit is circumferentially provided with an annular boss, and the setting position of the boss on the roller unit corresponds to the blank position of the pole piece.

[0006] The roller unit can be manufactured based on the width of the electrode's dressing area and the width of the blank area. Then, when the electrode is placed on the rolling device, its blank area is aligned with the boss, and the electrode is rolled. When using this roller for rolling the electrode, it can effectively ensure the consistency of the electrode's blank area and the dressing area, thereby effectively preventing wrinkles and belt breaks in the electrode.

[0007] Preferably, the protruding height of the boss relative to the roller surface of the roller unit is between 50-300 μm, which is set based on the thickness difference between the dressing area and the blank area of ​​the existing pole piece.

[0008] Preferably, the width of the boss along the axial direction of the roller unit is between 200-2000 mm, which improves the consistency of the blank position and the extension of the dressing position, thereby effectively preventing the pole piece from wrinkling, breaking, etc.

[0009] Preferably, the edge of the boss is chamfered to effectively prevent the boss from scratching the pole piece.

[0010] Preferably, the boss is integrally formed on the roller unit, which can facilitate the processing and manufacturing of the roller unit.

[0011] Preferably, the roller unit is made of stainless steel or aluminum alloy, which can make the roller unit have better structural strength, thereby having a better rolling effect on the pole piece.

[0012] In the present invention, a roller-over-roller improved extension device is proposed, which increases the extension rate of the blank position by arranging an annular boss on at least one roller unit, and makes the position of the boss correspond to the blank position of the electrode, thereby improving the consistency of the extension of the blank position and the dressing position, and effectively preventing the electrode from wrinkling, breaking and the like.

[0013] Furthermore, the rounded edges of the bosses effectively prevent them from scratching the pole pieces. Integrating the bosses into the roller unit facilitates its manufacture. Made of stainless steel, the roller unit possesses superior structural strength, resulting in a superior rolling effect on the pole pieces.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the boss in the utility model.

[0017] Explanation of the numbers in the figure: 1, roller unit; 101, boss. DETAILED DESCRIPTION

[0018] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and should not be construed as limiting the present invention.

[0019] like Figure 1-Figure 2 The device for improving the stretching by rolling shown in the figure includes a roller unit 1, and is characterized in that an annular boss 101 is provided on the outer wall of the roller unit 1 along the circumferential direction, and the boss 101 is provided at a position corresponding to the blank position of the pole piece on the roller unit 1.

[0020] An annular boss 101 is provided on the roller unit 1, and the position of the boss 101 is made to correspond to the blank position of the electrode, thereby increasing the elongation rate of the blank position, thereby improving the consistency of the extension of the blank position and the dressing position, and further effectively preventing the electrode from wrinkling, breaking, and the like.

[0021] Based on the above overall design concept, the length of the roller unit 1 can also be set to be different according to the specific structure of the pole piece.

[0022] The protruding height of the boss 101 relative to the roller surface of the roller unit 1 is between 50 and 300 μm, and the width of the boss 101 along the axial direction of the roller unit 1 is between 200 and 2000 mm.

[0023] The aforementioned boss 101 is specifically formed on the roller unit 1, specifically located at its end. Based on the thickness difference between the dressing area and the blank area of ​​conventional pole pieces, the protrusion height of the boss 101 relative to the roller surface of the first roller unit 11 in this embodiment is between 50 and 300 μm. Furthermore, based on the width of the blank area of ​​conventional pole pieces, the axial width of the boss 101 along the first roller unit 11 is between 200 and 2000 mm.

[0024] Preferably, the edges of the boss 101 are rounded.

[0025] Preferably, the boss 101 is integrally formed on the roller unit 1 .

[0026] Preferably, the roller unit 1 is made of stainless steel or aluminum alloy. In order to improve the structural strength of the roller unit 1 and ensure the rolling effect on the electrode sheet, the roller unit 1 of this embodiment is made of stainless steel.

[0027] When the roller of this embodiment is used, the roller unit 1 can be manufactured based on the width of the electrode's dressing area and the width of the blank area. Then, when the electrode is placed on the rolling device, its blank area is aligned with the boss 101, and the electrode is rolled. When the roller unit 1 is used to roll the electrode, it can effectively ensure the consistency of the extension of the electrode's blank area and the dressing area, thereby effectively preventing the electrode from wrinkling, breaking, etc.

[0028] The pole piece rolling device of this embodiment can effectively prevent the pole piece from wrinkling, breaking, etc. after rolling, and the position of the boss 101 of the roller unit 1 only needs to be replaced once for different types of pole pieces. Compared with the traditional method of pasting Teflon tape, it has lower cost and better effect, can reduce the phenomenon of wrinkling, breaking, etc. of the pole piece due to inconsistent thickness of Teflon tape or the influence of pasting operation level, and can have better practicality.

[0029] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A roller-over-roller extension improvement device, comprising a roller unit (1), characterized in that: An annular boss (101) is provided on the outer side wall of the roller unit (1) along the circumferential direction; the boss (101) is provided at a position on the roller unit (1) corresponding to a blank position of the pole piece; the protrusion height of the boss (101) relative to the roller surface of the roller unit (1) is between 50 and 300 μm; the width of the boss (101) along the axial direction of the roller unit (1) is between 200 and 2000 mm; and the edge of the boss (101) is provided with rounded corners.

2. The roller-over-roller stretching device according to claim 1, characterized in that: The boss (101) is integrally formed on the roller unit (1).

3. The roller-over-roller stretching device according to claim 2, characterized in that: The roller unit (1) is made of stainless steel or aluminum alloy.

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