Suspension shaft pre-rolling device for pole piece in battery production

Abstract

The utility model discloses a pole piece suspension shaft pre-rolling device in battery production, and belongs to the technical field of battery production, the pole piece suspension shaft pre-rolling device comprises a left bending cylinder and a right bending cylinder, the upper end of the left bending cylinder is provided with a roll shaft driver, the upper end of the right bending cylinder is provided with a rotating speed motor, a press roll is arranged between the left bending cylinder and the right bending cylinder, and the roll shaft driver is connected with the rotating speed motor. The left end of the pressing roller is connected with the roller shaft driver, and the right end of the pressing roller is connected with the rotating speed motor. The large compaction distribution difference value of the dressing layer caused by one-time rolling is improved, the compaction window capable of being borne by the pole piece is improved, larger compaction pursuit is achieved, and targeted pole piece adjustment is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of battery production technology, specifically relating to a suspension shaft pre-rolling device for electrode sheets in battery production. Background Technology

[0002] In battery manufacturing, the electrode rolling process after coating is crucial. As the electrodes pass through the rolling rollers, their thickness is reduced, and the intermolecular gaps in the coating are minimized, significantly improving battery performance while saving space.

[0003] Currently, the mainstream rolling process still uses a single-stage rolling method to roll the electrode sheets. This traditional rolling structure is suitable for most electrode sheets. However, firstly, due to the influence of factors such as slurry viscosity, gasket specifications, foil pattern, and coating equipment process capabilities during the electrode coating process, the final coated electrode sheets often exhibit inconsistent coating thickness, and even bulging edges in the thinned areas. Secondly, in the pursuit of battery performance, the compaction of the electrode sheets continuously increases. During the single-stage rolling process, due to the high speed and large roller pressure, the longitudinal compaction of the electrode coating layer is inconsistent, which can easily lead to abnormalities such as inconsistent elongation, large arc height, or even strip breakage.

[0004] Therefore, in the process of processing electrode sheets with large differences in thickness distribution or high compaction requirements, current rolling equipment is difficult to achieve the desired result in a single rolling process. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a suspension pre-rolling device for electrode sheets in battery production, which solves the problems mentioned in the background art.

[0006] The purpose of this invention is achieved as follows: A suspended pre-rolling device for electrode sheets in battery production includes a left bending cylinder and a right bending cylinder. A roller drive is installed at the upper end of the left bending cylinder, and a speed motor is installed at the upper end of the right bending cylinder. A pressure roller is installed between the left and right bending cylinders. The left end of the pressure roller is connected to the roller drive, and the right end of the pressure roller is connected to the speed motor. When the thickness distribution of the coated electrode sheet varies significantly or the rolling compaction requirement is high, a single rolling process using the pressure roller solves the problem.

[0007] Furthermore, the pressure roller includes a roller shaft, and a roller layer and multiple suspended rollers are connected to the outside of the roller shaft. The multiple suspended rollers are evenly arranged and connected to the outside of the roller shaft to improve the surface smoothness of the pressure roller and ensure the appearance of the electrode sheet after pressing.

[0008] Furthermore, the suspension roller includes a central support ring, the outer end of which is connected to a support shaft. The support shaft has multiple cavities inside, each being a T-shaped cavity. Compressed air is installed inside each cavity, and when the roller is subjected to external force, the T-shaped cavity provides a corresponding reaction force.

[0009] Furthermore, the left-bending cylinder includes a left front cylinder and a left rear cylinder, and the roller drive includes an upper drive and a lower drive.

[0010] Furthermore, the right-hand cylinder includes a right front cylinder and a right rear cylinder, and the speed motor includes an upper motor and a lower motor.

[0011] The beneficial effects of this utility model are as follows: Before the electrode is rolled, it first passes through this suspended shaft pre-rolling device to pre-roll the electrode, so that the overall compaction distribution of the coating layer on the surface of the current collector is uniform. Then, normal rolling is carried out, which greatly improves the large difference in the compaction distribution of the coating layer caused by one rolling, improves the compaction window that the electrode can withstand, and achieves a greater compaction pursuit.

[0012] Secondly, for coating abnormal electrode sheets, such as bulging rolls or thick-edge rolls in thinned areas, since this pre-roll pressing device is composed of multiple suspended rollers, the rollers that contact the abnormal position will provide corresponding reaction force to the abnormal position of the electrode sheet, thereby achieving targeted electrode sheet adjustment.

[0013] Furthermore, since the transverse end face of this pressure roller device is composed of multiple suspended pressure rollers, and the cross-section of each suspended pressure roller is a multi-T-shaped cavity structure, it can be applied to situations where the electrode sheet exhibits irregular abnormalities, thus exhibiting strong compatibility. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the pressure roller structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the main structure of the suspension roller of this utility model;

[0017] Figure 4 This is a schematic diagram of the right-side structure of the suspension roller of this utility model.

[0018] In the diagram: 1. Left bending cylinder 1-1, right bending cylinder 2. Roller drive 3. Pressure roller 5. Electrode 6. Speed ​​motor 7. Roller shaft 8. Roller layer 9. Suspension roller 10. Support ring 11. Support shaft 12. Cavity. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that all directional terms such as up, down, front, back, left, and right appearing in the present invention are not intended to limit the present invention, but are only used to more clearly explain and interpret the present invention. Example 1

[0020] like Figure 1-4 As shown in the figure, this embodiment discloses a suspended-axis pre-rolling device for electrode sheets in battery production, which includes a left bending cylinder 1 and a right bending cylinder 1-1. A roller drive 2 is provided at the upper end of the left bending cylinder 1, and a speed motor 6 is provided at the upper end of the right bending cylinder 1-1. A pressure roller 3 is provided between the left bending cylinder 1 and the right bending cylinder 1-1. The left end of the pressure roller 3 is connected to the roller drive 2, and the right end of the pressure roller 3 is connected to the speed motor 6. Before the electrode sheet 5 is rolled, it first passes through this suspended-axis pre-rolling device to pre-roll the electrode sheet 5, so that the overall compaction distribution of the coating layer on the current collector surface is uniform. Then, normal rolling is performed, which greatly improves the large difference in the compaction distribution of the coating layer caused by the first rolling, improves the compaction window that the electrode sheet 5 can withstand, and achieves a greater compaction target. When the coating thickness distribution of the electrode sheet 5 is large after coating or the rolling compaction requirement is high, the pressure roller 3 is used to perform a first rolling to solve the problem. Example 2

[0021] like Figure 1-4 As shown in the figure, this embodiment discloses a suspended pre-rolling device for electrode sheets in battery production, which includes a left bending cylinder 1 and a right bending cylinder 1-1. A roller drive 2 is installed at the upper end of the left bending cylinder 1, and a speed motor 6 is installed at the upper end of the right bending cylinder 1-1. A pressure roller 3 is installed between the left and right bending cylinders 1-1. The left end of the pressure roller 3 is connected to the roller drive 2, and the right end of the pressure roller 3 is connected to the speed motor 6. When the coating thickness distribution of the electrode sheet 5 is significantly different after coating, or when the rolling compaction requirement is high, a single rolling process using the pressure roller 3 is performed to resolve the issue.

[0022] For better results, the pressure roller 3 includes a roller shaft 7, and a roller layer 8 and multiple suspended rollers 9 are connected to the outside of the roller shaft 7. The multiple suspended rollers 9 are evenly arranged and connected to the outside of the roller shaft 7 to improve the smoothness of the surface of the pressure roller 3 and ensure the appearance of the electrode sheet 5 after rolling.

[0023] For better performance, the suspension roller 9 includes a central support ring 10, the outer end of which is connected to a support shaft 11. The support shaft 11 has multiple cavities 12 inside, which are T-shaped cavities, but not limited to T-shaped cavities 12. Compressed air is installed inside the cavities 12, and when the pressure roller 3 is subjected to external force, the T-shaped cavities 12 provide a corresponding reaction force.

[0024] For better performance, the left bending cylinder 1 includes a left front cylinder and a left rear cylinder, the roller drive 2 includes an upper drive and a lower drive; the right bending cylinder 1-1 includes a right front cylinder and a right rear cylinder, and the speed motor 6 includes an upper motor and a lower motor.

[0025] Before the electrode 5 is rolled, it first passes through this suspended shaft pre-rolling device to pre-roll it, ensuring that the coating layer on the current collector surface is uniformly compacted. Then, it is rolled normally, which greatly improves the large difference in the compaction distribution of the coating layer caused by a single roll, improves the compaction window that the electrode 5 can withstand, and achieves a greater compaction target. Secondly, for electrode 5 with abnormal coating, such as bulging rolls or thick-edge rolls in thinned areas, since this pre-rolling device is composed of multiple suspended shaft pressure rollers 3, the pressure rollers 3 that contact the abnormal position will provide corresponding reaction force to the abnormal position of the electrode 5, thereby achieving targeted adjustment of the electrode 5. Moreover, since the transverse end face of this pressure roller 3 device is composed of multiple suspended shaft pressure rollers 3, and the cross-section of each suspended shaft pressure roller 3 is a structure of multiple T-shaped cavities 12, it can be applied to situations where the electrode 5 has irregular abnormalities, and has strong compatibility.

[0026] Pre-rolling allows for initial adjustment of the longitudinal compaction distribution of electrode 5, improving the compaction window that electrode 5 can withstand. It is applicable to situations where electrode 5 exhibits irregular abnormalities, demonstrating strong compatibility. It is not limited to a single pre-rolling operation; multiple pre-rolling devices can be placed before the main roller. It is not limited to the T-shaped cavity 12; the method of providing reaction force in the T-shaped cavity 12 is not limited to gas, but springs and other devices are also applicable. Pre-rolling electrode 5 improves the longitudinal compaction consistency of the coating, enhances the compaction window that electrode 5 can withstand, and allows for greater compaction. It also provides targeted adjustments when the coating thickness of the same electrode 5 fluctuates, making it applicable to situations where electrode 5 exhibits irregular abnormalities, demonstrating strong compatibility.

[0027] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A pre-rolling device for electrode sheets in battery production, comprising a left bending cylinder and a right bending cylinder, characterized in that: The upper end of the left bending cylinder is equipped with a roller drive, and the upper end of the right bending cylinder is equipped with a speed motor. A pressure roller is arranged between the left and right bending cylinders. The left end of the pressure roller is connected to the roller drive, and the right end of the pressure roller is connected to the speed motor. The pressure roller includes a roller shaft, and a roller layer and multiple suspended rollers are connected to the outside of the roller shaft. The multiple suspended rollers are evenly arranged and connected to the outside of the roller shaft. The suspended roller includes a central support ring, and the outer end of the support ring is connected to a support shaft. The support shaft has multiple cavities inside, and each cavity is filled with compressed air. The cavity is a T-shaped cavity.

2. The suspension-axis pre-rolling device for electrode sheets in battery production according to claim 1, characterized in that: The left-bending cylinder includes a left front cylinder and a left rear cylinder, and the roller drive includes an upper drive and a lower drive.

3. The suspended shaft pre-rolling device for electrode sheets in battery production according to claim 1, characterized in that: The right-hand cylinder includes a right front cylinder and a right rear cylinder, and the speed motor includes an upper motor and a lower motor.

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