Variable diameter floating roll and electrode roll press

Abstract

The utility model relates to the field of electrode roll press, concretely relates to a variable diameter floating roller and electrode roll press, and the variable diameter floating roller includes: a roller body, and at least one adjustable diameter contact component is arranged on the roller body and corresponds with the position of the lug area, wherein the adjustable diameter contact component includes: a radial expansion drive mechanism, an elastic ring-shaped bearing beam is sleeved on the outside of the radial expansion drive mechanism, and a rubber composite layer is wrapped around the elastic ring-shaped bearing beam. The embodiment of the utility model realizes the real-time and on-line adjustment of the diameter by controlling the radial expansion drive mechanism, thereby changing the friction or contact pressure of the adjustable diameter contact component and the lug of the pole piece, and further changing the elongation of the lug, and the whole process does not need to stop, and the equipment operation rate is improved.

Description

Technical Field

[0001] This utility model relates to the field of electrode roller presses, specifically to a variable diameter floating roller.

[0002] This utility model also relates to an electrode roller press. Background Technology

[0003] In the manufacturing process of lithium-ion batteries, the rolling process of the positive electrode sheet is a key step that determines the battery performance and production efficiency. In actual production, the positive electrode sheet often breaks after rolling, which has become a common industry problem and seriously restricts the continuity and efficiency of the production line.

[0004] The problem of electrode breakage is affected by a variety of factors. Among them, the unstable quality of the foil material itself and the improper tension control of the electrode, especially the tab area, during the rolling process are the main reasons. Due to its special geometric and material properties, the tab area is prone to stress concentration or uneven deformation during rolling and traction, which in turn leads to the breakage of the entire electrode. Utility Model Content

[0005] The purpose of this invention is to provide a variable diameter floating roller and electrode roller press, which aims to solve the problem of electrode strip breakage caused by improper control of electrode tab stretching.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution: A variable diameter floating roller for an electrode roller press, comprising: A roller body; and At least one adjustable diameter contact assembly disposed on the roller body and corresponding to the position of the tab area; The adjustable diameter contact assembly includes: A radial expansion drive mechanism; An elastic annular load-bearing beam fitted outside the radial expansion drive mechanism; A rubber composite layer encasing the elastic annular load-bearing beam.

[0007] Furthermore, the elastic annular load-bearing beam has an internal tensile structure.

[0008] Furthermore, the tensile structure is a honeycomb structure.

[0009] Furthermore, the honeycomb structure is a concave hexagonal honeycomb structure.

[0010] Furthermore, the concave hexagonal honeycomb structure is formed on the cross-section of the elastic annular load-bearing beam, so that when the elastic annular load-bearing beam is driven to expand radially by the radial expansion drive mechanism, its perimeter increases accordingly, while its thickness and axial length remain stable.

[0011] Furthermore, the rubber composite layer and the elastic annular load-bearing beam are integrally formed.

[0012] Furthermore, the rubber composite layer wraps around the outer wall, inner wall, and side wall of the elastic annular load-bearing beam and fills the internal tensile structure of the elastic annular load-bearing beam.

[0013] Furthermore, the radial expansion drive mechanism is an air-expanding shaft section that can achieve radial expansion or contraction by adjusting the air pressure of the internal air bladder.

[0014] Furthermore, the outer surface of the air-expanding shaft section is provided with a plurality of fan-shaped expansion plates distributed circumferentially, and the joint between adjacent fan-shaped expansion plates is a toothed structure.

[0015] An electrode roller press includes a variable diameter floating roller.

[0016] The beneficial effects of this utility model are: The embodiments of this utility model achieve real-time, online adjustment of the diameter by controlling the radial expansion drive mechanism, thereby changing the friction or contact pressure between the adjustable diameter contact component and the electrode tab, and thus changing the elongation rate of the electrode tab. The entire process does not require machine downtime, improving the uptime of the equipment. Attached Figure Description

[0017] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] Figure 1 This is a front view of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the adjustable diameter contact assembly according to an embodiment of the present invention. Figure 3 This is a three-dimensional cross-sectional view of the air shaft section according to an embodiment of the present utility model; Figure 4 This is a perspective view of the elastic annular load-bearing beam and the rubber composite layer according to an embodiment of the present utility model. The rubber composite layer in the figure is transparent. The labels in the diagram represent the following: 1-Roller body; 2-Airbag; 3-Pressure regulating valve; 4-Elastic ring-shaped load-bearing beam; 5-Rubber composite layer; 6-Fan-shaped ring-shaped expansion plate; 7-Toothed structure. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This invention provides a variable diameter floating roller for an electrode roll press.

[0021] The floating roller is installed at the feed end or discharge end of the electrode roll press and integrates one or more adjustable diameter contact components along its axial direction. The positions of these components correspond precisely to the tab areas of the passing electrode.

[0022] The adjustable diameter contact assembly comprises, from the inside out: a radial expansion drive mechanism, a metal elastic ring load-bearing beam 4, and a rubber composite layer 5.

[0023] In a preferred embodiment, the radial expansion drive mechanism is an air shaft section, the structure of which is the same as that of an air shaft.

[0024] The air passage inside the air expansion shaft section is connected to an external precision air pressure control system (pressure regulating valve 3). Operators or automated control systems can precisely adjust the air pressure supplied to the air expansion shaft section to control the degree of its radial expansion.

[0025] In order to ensure that the expansion force is transmitted evenly, the outer surface of the air expansion shaft section is not a traditional key bar, but is provided with multiple fan-shaped expansion plates 6 that are spliced ​​together along the circumference.

[0026] To reduce the gaps at the joints of the expansion plates, a toothed structure 7 is designed at the joint between adjacent fan-shaped expansion plates 6 to ensure that a nearly complete annular support surface can be formed during expansion, thus guaranteeing uniform force transmission and stability.

[0027] On the outside of the air-expanding shaft section, a load-bearing and deformation control component—a metal elastic ring-shaped load-bearing beam 4—is fitted.

[0028] The metal elastic ring load-bearing beam 4 is made of metal materials with excellent elasticity and fatigue resistance (such as spring steel, titanium alloy, etc.), and can be manufactured by precision processes such as laser cutting or metal 3D printing.

[0029] The interior of the metal elastic ring load-bearing beam 4 has a special tensile structure. In a preferred embodiment, this structure is a honeycomb structure, such as a concave hexagonal honeycomb structure.

[0030] This taut structure gives the metal load-bearing beam a unique macroscopic mechanical property: when it is subjected to radial expansion force from the internal air-expanding shaft section, its overall circumference can increase synchronously to achieve a larger diameter, but its thickness (radial dimension) and axial length can remain stable.

[0031] This characteristic ensures that the geometric accuracy and structural rigidity of the contact surface do not decrease during the adjustment process, and can stably withstand the high pressure from the rolling process.

[0032] The outermost layer is a rubber composite layer 5 that is in direct contact with the electrode tabs. This rubber layer is not simply pasted or fitted onto the outside of the metal load-bearing beam, but is integrally molded to form a tightly bonded composite whole with the metal load-bearing beam.

[0033] Specifically, before vulcanization, the liquid rubber not only wraps the outer, inner, and side walls of the metal load-bearing beam, but also completely fills its internal honeycomb-like tensile structure.

[0034] This deeply integrated composite structure brings multiple advantages: First, it provides a smooth, continuous working surface with a high coefficient of friction, which can reliably grip and transmit tension to the tabs; second, the elasticity of the rubber itself can cushion the impact and further stabilize the tension; finally, the rubber filled inside the honeycomb structure greatly enhances the overall component's resistance to compression and local collapse, ensuring that the contact surface remains smooth and stable under any expansion diameter.

[0035] The working process of this invention is as follows: When it is necessary to adjust the elongation rate of the tab area, the control system precisely fills or releases a certain amount of compressed gas into the air expansion shaft section through the pressure regulating valve 3. The change in air pressure causes the fan-shaped annular expansion plate 6 of the air expansion shaft section to expand radially outward or contract radially inward, thereby driving the external metal elastic annular load-bearing beam 4 and rubber composite layer 5 to undergo synchronous radial displacement, thereby changing the effective outer diameter of the adjustable diameter contact assembly.

[0036] Because this adjustment process is continuous, rapid, and can be performed online, it can perform dynamic feedback control based on the real-time status of the electrode, always maintaining the tension of the electrode tab within the optimal range, thereby effectively preventing the occurrence of strip breakage.

[0037] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.

Claims

1. A variable diameter floating roller for use in an electrode roller press, characterized in that, include: One roller body (1); as well as At least one adjustable diameter contact assembly is disposed on the roller body (1) and corresponds to the position of the tab area; The adjustable diameter contact assembly includes: A radial expansion drive mechanism; An elastic annular load-bearing beam (4) is fitted outside the radial expansion drive mechanism. A rubber composite layer (5) enclosing the elastic annular load-bearing beam (4).

2. The variable diameter floating roller according to claim 1, characterized in that, The elastic ring-shaped load-bearing beam (4) has an internal tensile structure.

3. The variable diameter floating roller according to claim 2, characterized in that, The expansion structure is a honeycomb structure.

4. The variable diameter floating roller according to claim 3, characterized in that, The honeycomb structure is a concave hexagonal honeycomb structure.

5. The variable diameter floating roller according to claim 4, characterized in that, The concave hexagonal honeycomb structure is formed on the cross section of the elastic annular load-bearing beam (4), such that when the elastic annular load-bearing beam (4) is driven to expand radially by the radial expansion drive mechanism, its perimeter increases accordingly, while its thickness and axial length remain stable.

6. The variable diameter floating roller according to claim 1, characterized in that, The rubber composite layer (5) and the elastic annular load-bearing beam (4) are integrally formed.

7. The variable diameter floating roller according to claim 6, characterized in that, The rubber composite layer (5) wraps the outer wall, inner wall and side wall of the elastic annular load-bearing beam (4) and fills the internal expansion structure of the elastic annular load-bearing beam (4).

8. The variable diameter floating roller according to any one of claims 1-7, characterized in that, The radial expansion drive mechanism is an air-expanded shaft section that can achieve radial expansion or contraction by adjusting the air pressure of the internal air bladder (2).

9. The variable diameter floating roller according to claim 8, characterized in that, The outer surface of the air-expanding shaft section is provided with a plurality of fan-shaped expansion plates (6) distributed along the circumference, and the joint between adjacent fan-shaped expansion plates (6) is a toothed structure (7).

10. An electrode roller press, characterized in that, Includes the variable diameter floating roller according to any one of claims 1-9.

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