A kind of pole ear smoothing conveying roller

Abstract

The utility model proposes a tab smoothing conveying roller, which relates to the technical field of lithium batteries, and comprises a roller body for conveying a pole piece, and air holes are circumferentially distributed at both ends of the roller body, and air flows in the air holes to blow toward the tab of the pole piece and lift the tab to float. The utility model blows air toward the tab affected by gravity and sway through the conveying roller, exerts a force on the tab, and makes the tab get rid of the influence of gravity and restore to a flat state, thereby achieving the effect of smoothing the tab.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a tab smoothing conveying roller. Background Art

[0002] Lithium battery cells are usually composed of positive and negative electrodes, separators and electrolytes. The semi-finished products of positive and negative electrodes in the battery production process are usually in the form of coils. There are evenly spaced pole ears on the pole sheet coils. Cylindrical / square cells are manufactured through winding / cutting and stacking processes. The pole ears on the pole sheets can be produced by laser die cutting and other technologies. In the processes of pole ear forming, pole sheet winding, slicing, etc., the pole sheets with pole ears need to pass through various transmission rollers to complete various processes.

[0003] The thickness of the tab is very thin and the rigidity is low, especially the negative pole tab, which is easily affected by gravity and causes sagging or swinging. As a result, the top of the tab hits the transmission roller when the pole piece passes through the transmission roller, causing the tab to fold and produce creases on the tab, affecting the quality of the tab on the pole piece. Usually, in the battery cell manufacturing process, the pole piece needs to pass through dozens of transmission rollers, which makes the tab fold or even tear easily, affecting the battery cell yield. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a tab smoothing conveying roller to avoid the phenomenon that the tab is bent and damaged during the process of conveying the pole piece.

[0005] Based on the technical problems existing in the background technology, the utility model proposes a pole ear smoothing conveying roller, including a roller body for conveying pole pieces, with wind holes distributed circumferentially at both ends of the roller body, and airflow in the wind holes blowing toward the pole ear of the pole piece and lifting the pole ear to float.

[0006] Furthermore, the roller body comprises a roller body and a roller head, a slot is provided on the end surface of the roller body, a plug column matching the slot is connected to the end surface of the roller head, and the roller body and the roller head are coaxially spliced ​​with each other.

[0007] Furthermore, an annular groove is provided on the roller head, and the air hole is located in the annular groove and guides the airflow to blow toward the pole ear.

[0008] Furthermore, two groups of air holes are arranged in the annular groove, the air flow direction of one group of air holes is perpendicular to the rotation axis of the roller head, and the air flow direction of the other group of air holes forms an acute angle with the rotation axis of the roller head and the acute angle openings face outwards.

[0009] Furthermore, when the roller head rotates, the ratio of the interval between two adjacent pole ears to the arc length passed by two adjacent air holes is an integer greater than one.

[0010] Furthermore, the interval angles between the air holes are all the same.

[0011] Furthermore, the size of the airflow is adjustable.

[0012] Compared with the prior art, the tab smoothing conveying roller proposed in the utility model adopts the above technical solution and achieves the following technical effects:

[0013] The utility model blows air to the pole ear affected by gravity and sway through a conveying roller, exerts a force on the pole ear, frees the pole ear from the influence of gravity, and restores it to a flat state, thereby achieving the effect of smoothing the pole ear; the force is a flexible force and the size of which can be adjusted by an air source. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the operation structure of the utility model;

[0017] Figure 4 It is a schematic diagram of the operating principle structure of the utility model.

[0018] In the figure: 1, pole piece; 2, roller body; 3, air hole; 11, pole ear; 21, roller body; 22, roller head; 211, slot; 221, plug post; 222, ring groove. DETAILED DESCRIPTION

[0019] In the present invention, unless otherwise clearly specified and limited, the terms "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 one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] Example

[0022] Please refer to Figure 1-Figure 4 The utility model provides a pole ear smoothing conveying roller, comprising a roller body 2 for conveying a pole piece 1, wind holes 3 circumferentially distributed at both ends of the roller body 2, and airflow in the wind holes 3 blowing toward the pole ear 11 of the pole piece 1 and lifting the pole ear 11 to float. When the pole piece 1 is transmitted on the transmission roller, the pole ears 11 on both sides of the pole piece 1 will sag due to gravity. At this time, a smooth airflow can be blown out of the wind hole 3 to blow the pole ears 11 outward and upward, so that the pole ears 11 are almost horizontal with the pole piece 1, avoiding the pole ears 11 from being folded into the gap between the pole piece 1 and the roller body 2 and causing crushing. In the utility model, there are two types of wind holes 3, one is an inclined wind hole 3, and the other is a vertical wind hole 3. When the pole ear 11 is close to the roller body 2, the inclined wind hole 3 can blow the pole ear 11 out of the gap between the pole piece 1 and the roller body 2, avoiding the pole ear 11 from being crushed when the pole piece 1 contacts the roller body 2. When the pole ear 11 is close to the roller body 2, the vertical wind hole 3 can blow the pole ear 11 to float, so that it can be transmitted in the same plane as the pole piece 1.

[0023] In a specific embodiment, refer to Figure 1 , Figure 2 The roller body 2 includes a roller body 21 and a roller head 22. A slot 211 is provided on the end surface of the roller body 21. A plug 221 matching the slot 211 is connected to the end surface of the roller head 22. The roller body 21 and the roller head 22 are coaxially spliced ​​with each other. The length of the roller body 21 can be changed according to the width of the winding core, so as to be suitable for the transmission of pole pieces 1 of different widths.

[0024] In a specific embodiment, refer to Figure 1 , Figure 2 , Figure 3 The roller head 22 is provided with an annular groove 222, and the air hole 3 is located in the annular groove 222 and guides the air flow to blow toward the pole ear 11. The annular groove 222 can prevent the pole piece 1 from being bulged during the transmission of the pole piece 1, thereby affecting the smoothness of the transmission, and at the same time, the annular groove 222 can provide a location for the air hole 3 to be set.

[0025] In a specific embodiment, refer to Figure 2 , Figure 3 Two groups of air holes 3 are arranged in the annular groove 222. The airflow direction of one group of air holes 3 is perpendicular to the rotation axis of the roller head 22, and the airflow direction of the other group of air holes 3 forms an acute angle with the rotation axis of the roller head 22 and the acute angle opens outward. The tilted air holes 3 can blow the pole ear 11 away from the gap between the pole piece 1 and the roller body 2 to avoid crushing the pole ear 11 when the pole piece 1 contacts the roller body 2. The vertical air holes 3 can blow the pole ear 11 to float so that it can be transported in the same plane as the pole piece 1.

[0026] In a specific embodiment, refer to Figure 3When the roller head 22 rotates, the ratio of the interval between two adjacent pole ears 11 to the arc length of two adjacent air holes 3 is an integer greater than 1. This ensures that the air holes 3 and the pole ears 11 can be aligned during the rotation of the roller body 2 to avoid misalignment.

[0027] In a specific embodiment, refer to Figure 1 , Figure 3 , the interval angles between the air holes 3 are the same. The angular intervals between the air holes 3 can make the air holes 3 correspond to the interval regularity between the pole tabs 11.

[0028] In a specific embodiment, refer to Figure 1 The size of the airflow can be adjusted, and is suitable for blowing pole ears 11 of different weights.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tab smoothing conveying roller, characterized in that: It comprises a roller body (2) for conveying a pole piece (1), with air holes (3) distributed circumferentially at both ends of the roller body (2), and air flows in the air holes (3) to blow toward the pole ear (11) of the pole piece (1) and lift the pole ear (11) to float.

2. The tab smoothing conveying roller according to claim 1, characterized in that: The roller body (2) comprises a roller body (21) and a roller head (22); a slot (211) is provided on the end surface of the roller body (21); a plug post (221) matching the slot (211) is connected to the end surface of the roller head (22); and the roller body (21) and the roller head (22) are coaxially spliced ​​with each other.

3. The tab smoothing conveying roller according to claim 2, characterized in that: The roller head (22) is provided with an annular groove (222), and the air hole (3) is located in the annular groove (222) and guides the air flow to blow toward the pole ear (11).

4. The tab smoothing conveying roller according to claim 3, characterized in that: Two groups of air holes (3) are arranged in the annular groove (222), the air flow direction of one group of air holes (3) is perpendicular to the rotation axis of the roller head (22), and the air flow direction of the other group of air holes (3) forms an acute angle with the rotation axis of the roller head (22), and the acute angle opening faces outward.

5. The tab smoothing conveying roller according to claim 2, characterized in that: When the roller head (22) rotates, the ratio of the interval between two adjacent pole ears (11) to the arc length passed by two adjacent air holes (3) is an integer greater than one.

6. The tab smoothing conveying roller according to claim 1, characterized in that: The interval angles between the air holes (3) are all the same.

7. The tab smoothing conveying roller according to claim 1, characterized in that: The size of the airflow is adjustable.

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