A quick-change lithium battery electrode tab extension mechanism

Abstract

This utility model discloses a lithium battery electrode tab extension mechanism with rapid shape change capability, comprising: a main shaft, with an expansion shaft fixedly connected to each end of the main shaft, and a shaping shaft fixedly connected to the other end of the expansion shaft; the diameter of the shaping shaft is larger than the diameter of the main shaft; a plurality of extension rings are fitted on the shaping shaft and the main shaft; the extension rings deform, move to the main shaft, and adhere to the main shaft to achieve the extension effect. By moving the deformed extension rings to the main shaft and adhering to the main shaft to achieve the extension effect, controllable electrode extension operation is realized; the number, thickness, and position of the extension rings are determined according to the electrode width and the number of strips, which can meet different electrode models and extension requirements, and achieve rapid shape change; at the same time, it eliminates the product differences caused by different operator techniques in the prior art, greatly improving product effect and production capacity; moreover, the extension rings can be reused, saving production costs.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing equipment technology, specifically relating to a lithium battery electrode tab extension mechanism that can be quickly changed. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Lithium-ion battery electrodes generally consist of a coated area and a blank area. The coated area is where the active material is mainly coated, while the blank area is where no active material is coated. The blank area is usually located at the edge of the electrode, serving as a tab area or facilitating tab welding. Electrode rolling is a crucial step in the electrode production process. During rolling, pressure is applied to the coated area, and the blank area also stretches accordingly. However, because there is no pressure on the blank area, the stretching deformation of the coated and blank areas is inconsistent, resulting in wrinkles at the edges of the coated area and warping in the blank area. After rolling and flattening, the blank area is prone to stretching and breakage due to tension, affecting production efficiency and quality, and increasing costs.

[0004] In existing technologies, to address the issue of wavy edges on lithium battery electrodes caused by the difference in extension between the blank area and the material area during the rolling process, Teflon tape is typically applied to the rollers following the rolling mechanism to increase the extension of the blank area. However, the inventors have found that this method suffers from several drawbacks: the application effect lacks a standardized operating procedure, is highly dependent on the operator's skill, and has a long changeover time, thus impacting production efficiency. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a lithium battery electrode tab extension mechanism that can be quickly changed, so that the electrode extension can be controlled and the thickness and position of the extension ring can be quickly changed. At the same time, it eliminates the product differences caused by different operator techniques in the prior art, greatly improving product efficiency and production capacity. Moreover, the extension ring can be reused, saving production costs.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] The present invention provides a lithium battery electrode tab extension mechanism that allows for quick replacement, comprising: a main shaft, with an expansion shaft fixedly connected to each end of the main shaft, and a shaping shaft fixedly connected to the other end of the expansion shaft; the diameter of the shaping shaft is larger than the diameter of the main shaft; a plurality of extension rings are fitted on the shaping shaft and the main shaft; the extension rings deform, move to the main shaft, and fit against the main shaft to achieve an extension effect.

[0008] In at least one embodiment, the extended ring is made of a shape memory polymer material and has three deformation temperatures; the initial inner diameter of the extended ring is smaller than the diameter of the main shaft.

[0009] In at least one embodiment, the expansion shaft has a tapered structure; the end of the expansion shaft with a smaller diameter is connected to the main shaft, and the end with a larger diameter is connected to the shaping shaft.

[0010] In at least one embodiment, a heating device is provided inside the spindle.

[0011] In at least one embodiment, the heating device is a ring-shaped heating wire.

[0012] In at least one embodiment, a cooling device is provided inside the shaping shaft.

[0013] In at least one embodiment, the cooling device is an annular water-cooled pipe.

[0014] In at least one embodiment, the end of the shaping shaft away from the expansion shaft is mounted on a mechanism mounting base.

[0015] In at least one embodiment, the shaping shaft is mounted on the mechanism mounting base via a connecting shaft.

[0016] In at least one embodiment, the outer surface of the spindle is provided with scale lines.

[0017] The beneficial effects of the above-described technical solution of this utility model are as follows:

[0018] 1) This utility model discloses a lithium battery electrode tab extension mechanism with quick-change capability. By moving the deformed extension ring to the main shaft and fitting it with the main shaft, the extension effect is achieved, realizing controllable operation of electrode extension. The number, thickness, and position of the extension ring are determined according to the electrode width and the number of strips, which can meet different electrode models and extension requirements, and realize quick changeover. At the same time, the size and thickness of the extension ring are standardized, eliminating product differences caused by different operator techniques in the prior art, greatly improving product quality and production capacity. Moreover, the extension ring can be reused, saving production costs.

[0019] 2) The present invention provides a lithium battery electrode tab extension mechanism that can be quickly changed. The heating device of the main shaft creates a shaping temperature environment and a recovery temperature environment for the extension ring, and the cooling device of the shaping shaft creates a shaping temperature environment for the extension ring. This standardizes the deformation process of the extension ring and further realizes the controllable operation of electrode extension. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0021] Figure 1 This is a schematic diagram of the overall structure of a lithium battery electrode tab extension mechanism that can be quickly replaced according to this utility model.

[0022] Figure 2 This is a schematic diagram of the main shaft 4 mechanism and the extension ring structure of a lithium battery electrode tab extension mechanism that can be quickly changed according to this utility model.

[0023] Figure 3 This is a schematic diagram of the expansion shaft 3 and the shaping shaft mechanism of a lithium battery electrode tab extension mechanism that can be quickly changed according to this utility model.

[0024] In the diagram: 1. Mechanism mounting base; 2. Extension ring belt in storage; 3. Expansion shaft; 4. Main shaft; 5. Extension ring belt in use; 6. Heating device; 7. Cooling device.

[0025] The distances or dimensions between parts have been exaggerated to show their positions; the diagram is for illustrative purposes only. Detailed Implementation

[0026] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] For ease of description, the words "up," "down," "left," and "right" appearing in this utility model only indicate that they are consistent with the up, down, left, and right directions of the accompanying drawings. They do not limit the structure and are merely for the purpose of facilitating the description of this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Terminology Explanation: The terms "installation," "connection," "linking," and "fixing" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0030] As described in the background section, the purpose of this invention is to overcome the shortcomings of the prior art and provide a lithium battery electrode tab extension mechanism that can be quickly changed, enabling controllable electrode extension operations. The thickness and position of the extension ring can be quickly changed, eliminating product differences caused by different operator techniques in the prior art, greatly improving product efficiency and production capacity. Moreover, the extension ring can be reused, saving production costs.

[0031] Example 1

[0032] like Figure 1-3 As shown in the figure, this embodiment discloses a lithium battery electrode tab extension mechanism with rapid shape change capability, including: a main shaft 4, with an expansion shaft 3 fixedly connected to each end of the main shaft 4, and a shaping shaft fixedly connected to the end of each expansion shaft 3 away from the main shaft 4. The diameter of the shaping shaft is larger than the diameter of the main shaft 4, and several extension rings are fitted on the shaping shaft and the main shaft 4. The extension rings can deform, move to the main shaft 4, and fit against the main shaft 4 to achieve an extension effect. In this embodiment, the connection between the main shaft 4 and the expansion shaft 3, and the connection between the expansion shaft 3 and the shaping shaft, can be riveted to achieve rapid shape change, which is applicable to different types of expansion shafts 3, shaping shafts, etc., and the number of extension rings is 10 to 20.

[0033] The extended ring is made of a shape memory polymer material, such as polyurethane-based shape memory polymer, polyester-based shape memory polymer, styrene-based shape memory polymer, epoxy resin-based shape memory polymer, trans-polyisoprene shape memory polymer, etc. This shape memory polymer material has three deformation temperatures: molding temperature T1, setting temperature T2, and recovery temperature T3. In this embodiment, the molding temperature T1 is 80℃, the setting temperature T2 is 25℃, and the recovery temperature T3 is 60℃. The initial inner diameter of the extended ring is slightly smaller than the diameter of the main shaft 4 by 1-2 mm, ensuring that the extended ring can completely fit the main shaft 4 when it is moved onto the main shaft 4 and returns to its initial shape.

[0034] In this embodiment, the expansion shaft 3, which connects the main shaft 4 and the shaping shaft at both ends, has a tapered shape, meaning that the two ends of the expansion shaft 3 have different diameters. The end with the smaller diameter connects to the main shaft 4, and the end with the larger diameter connects to the shaping shaft. In this embodiment, the diameter of the shaping shaft is 10 mm larger than the diameter of the main shaft 4, therefore the diameter difference between the two ends of the expansion shaft 3 is 10 mm. The expansion shaft 3 is 200 mm long, serving as an intermediate transition between the main shaft 4 and the shaping shaft, and also as an intermediate transition for the deformation of the extension ring.

[0035] A heating device 6 is installed inside the spindle 4 to heat the spindle 4 and create a deformation environment for the extended ring belt. The heating device 6 can be a commonly used heating rod, heating plate, or other heating device 6. In order to ensure uniform and rapid heating of the spindle 4, in this embodiment, a ring-shaped heating wire is selected for the heating device 6. The ring-shaped heating wire is close to the inner surface of the spindle 4 and is the same length as the spindle 4.

[0036] A cooling device 7 is installed inside the shaping shaft to cool the shaping shaft and create a shaping temperature environment for the stretching ring. In order to ensure the temperature stability of the shaping shaft, in this embodiment, the cooling device 7 is an annular water-cooling pipe, which is close to the inner surface of the shaping shaft and has the same length as the shaping shaft.

[0037] In this embodiment, the ends of the two shaping shafts away from the expansion shaft 3 are mounted on the mechanism mounting base 1, and the shaping shafts and the mechanism mounting base 1 are connected by a connecting shaft.

[0038] In this embodiment, a scale line is provided on the outer surface of the spindle 4. When the extension ring moves to the spindle 4, the position can be determined according to the scale line.

[0039] In this embodiment, the specific usage of a quick-change lithium battery electrode tab extension mechanism is as follows:

[0040] (1) Before use, the main shaft 4 is heated to temperature T1 by heating device 6. The extension ring belt deforms under the molding temperature environment and moves outward from the main shaft 4. It deforms through expansion shaft 3, and the inner diameter expands and moves to the shaping shaft.

[0041] (2) The shaping shaft is maintained at temperature T2 under the action of the cooling device 7, and the deformed extension ring is shaped and stored in this shaping temperature environment;

[0042] (3) Determine the required number of extension rings based on the electrode width and the number of strips. After determining the model, move the required extension rings from the shaping shaft to the main shaft 4 and determine the position according to the scale lines on the main shaft 4.

[0043] (4) The main shaft 4 is heated to temperature T3 by heating device 6, and the extended ring is moved to the main shaft 4 and restored to its initial shape in the recovery temperature environment, and fits with the main shaft 4 to achieve the extension effect.

[0044] If a single layer of extension ring does not achieve the expected extension effect, multiple layers of extension ring can be superimposed at the same location. This allows for controllable electrode extension and enables quick changeover to meet different electrode models and extension requirements.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick-change lithium battery electrode tab extension mechanism, characterized in that, include: A main shaft has an expansion shaft fixedly connected to each end, and a shaping shaft fixedly connected to the other end of the expansion shaft. The diameter of the shaping shaft is larger than that of the main shaft. Several extension rings are fitted on the shaping shaft and the main shaft. The extension rings deform, move to the main shaft, and fit against the main shaft to achieve an extension effect.

2. The quick changeable lithium battery tab extending mechanism of claim 1, wherein, The extended ring is made of shape memory polymer material and has three deformation temperatures; the initial inner diameter of the extended ring is smaller than the diameter of the main shaft.

3. The quick changeable lithium battery tab extending mechanism of claim 1, wherein, The expansion shaft has a tapered structure; the end of the expansion shaft with a smaller diameter is connected to the main shaft, and the end with a larger diameter is connected to the shaping shaft.

4. The quick changeable lithium battery tab extending mechanism of claim 1, wherein, A heating device is installed inside the spindle.

5. A quick changeable lithium battery tab extending mechanism as claimed in claim 4, wherein, The heating device is a ring-shaped heating wire.

6. The quick changeable lithium battery tab extending mechanism of claim 1, wherein, A cooling device is installed inside the shaping shaft.

7. A quick changeable lithium battery tab extending mechanism as claimed in claim 6, wherein, The cooling device is a ring-shaped water-cooled pipe.

8. The quick changeable lithium battery tab extending mechanism of claim 1, wherein, The end of the shaping shaft away from the expansion shaft is mounted on the mechanism mounting base.

9. A quick changeable lithium battery tab extending mechanism as claimed in claim 8, wherein, The shaping shaft is mounted on the mechanism mounting base via a connecting shaft.

10. The quick changeable lithium battery tab extending mechanism of claim 1, wherein, The outer surface of the spindle is provided with scale lines.

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