A lamination machine tensionless lamination device

Abstract

The utility model discloses a kind of laminating machine tensionless laminating device, belong to lithium battery manufacturing equipment technical field.The device includes power drive component, traction execution component and compression adjusting component: diaphragm traction stepper motor of power drive component is driven diaphragm traction rubber-coated roll quantitative rotation by transmission coupling;Diaphragm guide roller of traction execution component guides diaphragm;Diaphragm compression roller of compression adjusting component cooperates with diaphragm traction rubber-coated roll and clamps diaphragm, and quantitative compression force is adjusted by compression roller pressure regulating screw.Working, diaphragm traction stepper motor quantitative pre-delivery diaphragm, so that diaphragm is in tensionless state before reverse folding, avoid with laminating machine pressure jaw violent friction, thoroughly eliminate diaphragm breakage risk, improve battery cell good product rate.The device simple structure, strong adaptability, can be implemented on existing laminating machine low-cost reconstruction.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium battery manufacturing equipment, specifically relating to a tension-free stacking device for a lithium battery stacking machine. Background Technology

[0002] In the Z-stacking process of lithium battery manufacturing, the stacking machine is the core equipment for realizing cell stacking. In the existing technology, the stacking process relies on the separator being continuously folded back under tension to complete the alternating stacking of positive and negative electrode sheets with the separator.

[0003] However, this tension-based lamination method has significant drawbacks: the laminator claws are made of metal and are flat in shape. As a reference for controlling the width of the laminated body, when the diaphragm is subjected to tensile force and folds back at the edge of the claw, there will be severe friction between the claw and the diaphragm the moment the claw is pulled out of the laminated body. Since the diaphragm itself is extremely thin (usually only 10-20μm), this friction can easily cause diaphragm damage, which in turn leads to serious quality problems such as NG insulation resistance and internal short circuits in the battery cell, significantly reducing the yield of the battery cell and increasing the cost losses for the manufacturing company.

[0004] To solve the above-mentioned technical problems, this utility model proposes a tension-free stacking device for a stacking machine. Through an innovative design of the diaphragm traction method, tension-free stacking is achieved, thereby fundamentally avoiding the risk of diaphragm breakage caused by tension friction. Summary of the Invention

[0005] This invention aims to overcome the defect of existing stacking machines where tension stacking causes easy damage to the diaphragm, and provides a tension-free stacking device for stacking machines, which realizes tension-free reverse folding of the diaphragm, eliminates severe friction between the pressure claw and the diaphragm, avoids diaphragm damage, and improves cell quality and yield.

[0006] The above-mentioned objective of this utility model is achieved through the following technical solution: a tension-free stacking device for a stacking machine, comprising a power drive component, a traction execution component, and a pressure adjustment component, wherein each component works together to achieve tension-free quantitative traction of the diaphragm, and the specific structure is as follows: The power drive assembly includes a diaphragm traction stepper motor and a transmission coupling; the diaphragm traction stepper motor is connected to the traction execution assembly through the transmission coupling to provide power output for diaphragm traction, and the rotation angle can be precisely controlled by the control system to achieve quantitative pre-feeding of the diaphragm.

[0007] The traction actuator includes a diaphragm traction coated roller and a diaphragm guide roller; the diaphragm traction coated roller is connected to a transmission coupling and is used to directly contact and traction the diaphragm to move; the diaphragm guide roller is located downstream of the diaphragm traction coated roller and is used to guide the diaphragm to ensure the stability of the diaphragm's movement trajectory.

[0008] The clamping adjustment assembly includes a diaphragm clamping roller and at least one clamping roller adjusting screw (such as a first clamping roller adjusting screw, a second clamping roller adjusting screw, and a third clamping roller adjusting screw); the diaphragm clamping roller is arranged opposite to the diaphragm traction coating roller and is used to cooperate with the diaphragm traction coating roller to achieve clamping and releasing of the diaphragm; the clamping roller adjusting screw is threadedly connected to the mounting bracket of the diaphragm clamping roller and is used to adjust the clamping force of the diaphragm clamping roller on the diaphragm to adapt to diaphragms of different thicknesses and materials.

[0009] The tension-free stacking principle of this device is as follows: The control system pre-sets the diaphragm traction parameters. During continuous stacking, before each diaphragm fold, the diaphragm traction stepper motor drives the diaphragm traction rubber-coated roller to rotate quantitatively through the transmission coupling, pre-feeding out the appropriate diaphragm length. At this time, the diaphragm is in a tension-free and relaxed state. After the fold is completed, the diaphragm only makes slight contact with the edge of the stacking machine's pressure claw, thus avoiding the severe friction between the pressure claw and the diaphragm during traditional tensioned stacking and completely eliminating the risk of diaphragm breakage.

[0010] The advantages of this utility model compared with the prior art are: 1. Eliminate the risk of diaphragm damage: By quantitatively pre-feeding the diaphragm to achieve tension-free reverse folding, the diaphragm and the edge of the pressure claw are free from tension friction, thus avoiding diaphragm damage at the source and solving quality hazards such as NG internal insulation resistance and internal short circuit in the battery cell.

[0011] 2. Improve cell yield: Undamaged separators can directly improve the yield of cell production and reduce the cost losses caused by defective products.

[0012] 3. High adaptability: The pressure of the diaphragm can be adjusted by adjusting the pressure roller and screw, which can adapt to diaphragms of different thicknesses and materials, and meet the stacking requirements of various lithium battery cells.

[0013] 4. Simple structure and easy implementation: The device consists of three conventional components: power drive, traction execution, and clamping adjustment. The structure is simple and easy to modify and implement on existing stacking machines, with low modification costs. Attached Figure Description

[0014] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the utility model.

[0015] Explanation of reference numerals in the attached drawings: 1-Diaphragm traction stepper motor, 2-Transmission coupling, 3-Diaphragm traction rubber-coated roller, 4-Diaphragm guide roller, 5-Diaphragm pressing roller, 6-First pressing roller adjusting screw, 7-Second pressing roller adjusting screw, 8-Third pressing roller adjusting screw. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0017] like Figure 1 As shown, a tensionless stacking device for a stacking machine includes a power drive assembly, a traction execution assembly, and a clamping adjustment assembly; The power drive assembly includes a diaphragm traction stepper motor 1 and a transmission coupling 2. The diaphragm traction stepper motor 1 is connected to the traction execution assembly via the transmission coupling 2. The traction actuator includes a diaphragm traction rubber-coated roller 3 and a diaphragm guide roller 4. The surface of the diaphragm traction rubber-coated roller 3 is covered with a rubber layer to increase the friction with the diaphragm for stable traction. The diaphragm traction rubber-coated roller 3 is connected to the transmission coupling 2. The diaphragm guide roller 4 is located downstream of the diaphragm traction rubber-coated roller 3. The axis of the diaphragm guide roller 4 is parallel to the axis of the diaphragm traction rubber-coated roller 3.

[0018] The clamping adjustment assembly includes a diaphragm clamping roller 5 and three clamping roller adjusting screws, namely a first clamping roller adjusting screw 6, a second clamping roller adjusting screw 7, and a third clamping roller adjusting screw 8, which are distributed at intervals along the axial direction of the diaphragm clamping roller 5. The diaphragm clamping roller 5 is arranged opposite to the diaphragm traction rubber-coated roller 3, and the clamping roller adjusting screws are threadedly connected to the mounting bracket of the diaphragm clamping roller 5.

[0019] The assembly process of this utility model device is as follows: The diaphragm traction stepper motor 1 is fixed to the mounting frame of the stacking machine with bolts; The output shaft of the diaphragm traction stepper motor 1 is connected to the rotating shaft of the diaphragm traction rubber-coated roller 3 by the transmission coupling 2 to ensure the coaxiality of the power transmission. Downstream of the diaphragm traction rubber-coated roller 3, a diaphragm guide roller 4 is installed through a bearing seat, so that the axis of the diaphragm guide roller 4 is parallel to the axis of the diaphragm traction rubber-coated roller 3, ensuring the straightness of the diaphragm guidance. Install the diaphragm clamping roller 5 so that it is opposite to the diaphragm traction rubber coating roller 3 to form a clamping area for the diaphragm; The first pressure roller adjusting screw 6, the second pressure roller adjusting screw 7, and the third pressure roller adjusting screw 8 are respectively threaded onto the mounting bracket of the diaphragm pressure roller 5. The pressure of the diaphragm pressure roller 5 on the diaphragm can be adjusted by turning the screws.

[0020] The working process of this utility model: Taking a certain type of lithium battery cell stacking as an example, the working process of this device is as follows: 1. Parameter preset: Set the diaphragm traction parameters in the stacking machine control system, including the rotation angle of the diaphragm traction coating roller 3 before each fold (corresponding to the diaphragm pre-feed length). 2. Diaphragm pre-feeding: Before the "diaphragm reverse folding" command is triggered in the stacking process, the diaphragm traction stepper motor 1 rotates according to preset parameters, and drives the diaphragm traction rubber-coated roller 3 to rotate quantitatively through the transmission coupling 2, pre-feeding out a sufficient length of diaphragm, so that the diaphragm is in a tension-free and relaxed state. 3. Tension-free reverse folding: When the pressure claw of the stacking machine performs the reverse folding action, the diaphragm is tension-free because it has been pre-fed. After folding, it only makes slight contact with the edge of the pressure claw, and there is no risk of frictional damage. 4. Cyclic execution: The "diaphragm pre-feeding" step is repeated before each folding action to continuously achieve tension-free stacking.

[0021] Adjustment and adaptation of this utility model: For diaphragms of different thicknesses (such as 12μm, 16μm) or materials (such as PP, PE), the clamping force of the diaphragm clamping roller 5 can be adjusted by turning the first clamping roller adjusting screw 6, the second clamping roller adjusting screw 7, and the third clamping roller adjusting screw 8, so as to ensure that the clamping force of the diaphragm traction coating roller 3 and the diaphragm clamping roller 5 on the diaphragm is moderate (ensuring that there is no slippage during traction and avoiding excessive clamping that could damage the diaphragm).

[0022] This specific embodiment demonstrates in detail the assembly, workflow, and adjustment methods of the device, fully proving that the technical solution of this utility model is feasible and scalable, and can effectively solve the problem of diaphragm damage caused by tension stacking in existing stacking machines.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A tension-free stacking device for a stacking machine, characterized in that: Includes power drive components, traction actuation components, and clamping adjustment components; The power drive assembly includes a diaphragm traction stepper motor (1) and a transmission coupling (2). The diaphragm traction stepper motor (1) is connected to the traction execution assembly via the transmission coupling (2). The traction actuator includes a diaphragm traction rubber-coated roller (3) and a diaphragm guide roller (4). The diaphragm traction rubber-coated roller (3) is connected to the transmission coupling (2), and the diaphragm guide roller (4) is located downstream of the diaphragm traction rubber-coated roller (3). The clamping adjustment assembly includes a diaphragm clamping roller (5) and at least one clamping roller adjusting screw. The diaphragm clamping roller (5) is arranged opposite to the diaphragm traction rubber coating roller (3). The clamping roller adjusting screw is threadedly connected to the mounting bracket of the diaphragm clamping roller (5).

2. The tensionless stacking device for a stacking machine according to claim 1, characterized in that: The number of pressure adjusting screws for the pressure roller is three, namely the first pressure adjusting screw (6), the second pressure adjusting screw (7) and the third pressure adjusting screw (8), which are distributed at intervals along the axial direction of the diaphragm pressure roller (5).

3. The tensionless stacking device for a stacking machine according to claim 1, characterized in that: The surface of the diaphragm traction rubber-coated roller (3) is covered with a rubber layer to increase the friction with the diaphragm and stabilize the traction.

4. The tensionless stacking device for a stacking machine according to claim 1, characterized in that: The axis of the diaphragm guide roller (4) is parallel to the axis of the diaphragm traction rubber coating roller (3).

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