A floating heating device for ML membrane hot pressing
Patent Information
- Application Number
- CN202522323455.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-10-20
- Estimated Expiration
- 2035-10-31
AI Technical Summary
这种传统方式存在诸多弊端：首先，铜块热容量大，加热时间长，能耗高；其次，温度检测点与铜块实际工作表面存在温差，导致温度控制精度差，热烫效果不稳定；再次，为防止粘黏，需在铜块表面频繁更换铁氟龙膜，维护繁琐且成本高；最后，由于加工和装配误差，当多个热烫头同时工作时，难以保证所有热烫面与被烫工件表面完全贴合，导致热烫焊纹深浅不一，外观一致性差
[0012]本申请通过采用嵌入合成石底座的定制发热片直接加热，取代传统的“发热棒-铜块”间接加热模式，具有热惯性小、升温迅速、热响应快的优点，实现了对工作温度的精确控制，有效解决了传统方式温差大、控温不准的难题，保障了ML膜热烫后表面平滑美观；每个热烫机构均通过独立的浮动机构支撑，利用弹性件的柔性压力，使各热烫头能自适应微调，确保多个热烫压面均能与工件表面平整贴合，压力均匀，从而显著提升了多条热烫焊纹的一致性；合成石底座优异的隔热性能防止了热量传递，保护了精密运动部件，且发热片模块化嵌装，整体更换简便，大幅降低了维护成本和时间。
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Figure CN224874295U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cell processing and manufacturing, and in particular to a floating heating device for hot heat treatment of ML film. Background Technology
[0002] In the manufacturing process of lithium batteries, it is often necessary to heat-seal the ML film onto the cell cover plate. Traditional heat-sealing mechanisms typically use a copper block as the heating element, specifically by inserting a 24V heating rod into the copper block to heat it. This traditional method has many drawbacks: First, the copper block has a large heat capacity, resulting in long heating time and high energy consumption; second, there is a temperature difference between the temperature detection point and the actual working surface of the copper block, leading to poor temperature control accuracy and unstable heat-sealing effect; third, to prevent sticking, the Teflon film on the surface of the copper block needs to be frequently replaced, which is cumbersome and costly; finally, due to processing and assembly errors, when multiple heat-sealing heads work simultaneously, it is difficult to ensure that all heat-sealing surfaces are completely in contact with the surface of the workpiece, resulting in inconsistent depth of the heat-sealing weld lines and poor appearance consistency. Utility Model Content
[0003] The purpose of this invention is to provide a floating heating device for hot ML film to solve the above-mentioned problems.
[0004] According to one aspect of this utility model, a floating heating device for hot pressing of ML film is provided, comprising a lifting module driven to rise and fall by a driving device, and further comprising: a fixed base fixedly disposed on the lifting end of the lifting module; a plurality of floating mechanisms disposed on the fixed base, each floating mechanism comprising a vertical guide rail, a slider and an elastic element, the slider being slidably disposed on the vertical guide rail, the elastic element providing upward elastic pressure to the slider; a plurality of hot pressing mechanisms correspondingly disposed on the sliders of the floating mechanisms, each hot pressing mechanism comprising a high-temperature resistant synthetic stone base and a customized heating element; the synthetic stone base having an accommodating groove, the customized heating element being fixedly embedded in the accommodating groove.
[0005] In some embodiments, the lifting module includes a base, a lead screw, a threaded block, and guide blocks on both sides; the driving device is disposed on one side of the base, the lead screw is driven to rotate by the driving device, and the threaded block is screwed onto the lead screw; guide grooves are provided on both sides of the threaded block, and guide blocks are respectively provided on both sides of the base, with the guide grooves slidingly engaging with the guide blocks; the fixed seat is fixedly disposed on the outside of the threaded block.
[0006] In some embodiments, the driving device is a servo motor and a reducer. The servo motor is disposed on one side of the base, the reducer is connected to the output end of the servo motor, and the lead screw is connected to the output end of the reducer.
[0007] In some embodiments, the elastic element is a spring post, the upper end of which is connected to the lower part of the slider, and the lower end is fixedly connected to the fixed base.
[0008] In some embodiments, the customized heating element is a low-voltage, high-current heating element with an operating voltage of 5V.
[0009] In some embodiments, the synthetic stone base concentrates the heat from the custom heating element onto the hot work surface through its thermal insulation properties.
[0010] In some embodiments, multiple floating mechanisms and their corresponding heat-pressing mechanisms operate independently, such that the hot-pressing surface of each heat-pressing mechanism can adaptively maintain parallel contact with the surface of the workpiece being heat-pressed.
[0011] Compared with the prior art, the beneficial effects of this application are as follows:
[0012] This application utilizes a custom heating element embedded in a synthetic stone base for direct heating, replacing the traditional indirect heating mode of "heating rod-copper block." This method offers advantages such as low thermal inertia, rapid heating, and fast thermal response, enabling precise control of the working temperature. It effectively solves the problems of large temperature differences and inaccurate temperature control in traditional methods, ensuring a smooth and aesthetically pleasing surface after heat treatment of the ML film. Each heat treatment mechanism is supported by an independent floating mechanism, utilizing the flexible pressure of elastic elements to allow each heat treatment head to self-adjust and finely adjust, ensuring that multiple heat treatment surfaces can be flat and adhered to the workpiece surface with uniform pressure, thereby significantly improving the consistency of multiple heat treatment weld lines. The excellent heat insulation performance of the synthetic stone base prevents heat transfer, protecting precision moving parts. Furthermore, the modular embedding of the heating element makes overall replacement simple, greatly reducing maintenance costs and time. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0014] Figure 2 This is a schematic diagram of the lifting module of this utility model;
[0015] Figure 3 This is a schematic diagram of the structure of the fixing base of this utility model;
[0016] Figure 4 This is a schematic diagram of the connection structure between the floating mechanism and the hot ironing mechanism of this utility model;
[0017] Figure 5 This is a schematic diagram of the structure of the synthetic stone base of this utility model. Detailed Implementation
[0018] 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.
[0019] refer to Figures 1 to 5 This application provides a floating heating device for hot pressing of ML film, including a lifting module 2 driven to rise and fall by a driving device 1, and further including: a fixed base 3, fixedly mounted on the lifting end of the lifting module 2; a plurality of floating mechanisms 4, disposed on the fixed base 3, each of the floating mechanisms 4 including a vertical guide rail 5, a slider 6 and an elastic element 7, the slider 6 being slidably disposed on the vertical guide rail 5, the elastic element 7 providing upward elastic pressure to the slider 6; a plurality of hot pressing mechanisms 8, correspondingly disposed on the slider 6 of the floating mechanisms 4, each of the hot pressing mechanisms 8 including a high-temperature resistant synthetic stone base 9 and a customized heating element 10; the synthetic stone base 9 having a receiving groove 11, the customized heating element 10 being fixedly embedded in the receiving groove 11.
[0020] In some embodiments, the lifting module 2 includes a base, a lead screw 12, a threaded block 13, and guide blocks 14 on both sides. The driving device 1 is disposed on one side of the base, the lead screw 12 is driven to rotate by the driving device 1, and the threaded block 13 is screwed onto the lead screw 12. Guide grooves are provided on both sides of the threaded block 13, and guide blocks 14 are respectively provided on both sides of the base, with the guide grooves slidingly engaging with the guide blocks 14. The fixed seat 3 is fixedly disposed on the outer side of the threaded block 13. Through the precision screw drive of the lead screw 12 and the threaded block 13, combined with the sliding engagement of the guide blocks 14 on both sides with the guide grooves, a high-rigidity and high-precision lifting motion system is formed. This structure can effectively eliminate swaying and off-center loading during the lifting process, ensuring the stability and straightness of the entire hot stamping device when it is pressed down, providing a stable and reliable motion foundation for the hot stamping process, thereby ensuring the accuracy of the hot stamping position.
[0021] In some embodiments, the drive device 1 comprises a servo motor and a reducer. The servo motor is mounted on one side of the base, the reducer is connected to the output end of the servo motor, and the lead screw 12 is connected to the output end of the reducer. This combination of servo motor and reducer provides a large and stable output torque, enabling precise position and speed control. This allows for precise programming control of the pressing speed, holding pressure, and lifting height during the hot stamping process, perfectly adapting to different process parameter requirements and greatly improving the automation level and process reproducibility of the equipment.
[0022] In some embodiments, the elastic element 7 is a spring post, with its upper end connected to the lower part of the slider 6 and its lower end fixed to the fixed base 3. As a standard component, the spring post has the advantages of stable performance, low cost, and easy installation. It provides continuous and smooth elastic pressure, making the floating movement of the slider 6 smooth and fluid, effectively absorbing and compensating for the flatness error of the workpiece surface, ensuring smooth contact between the heating head and the workpiece surface, and avoiding damage to the workpiece or device due to rigid impact.
[0023] In some embodiments, the customized heating element 10 is a low-voltage, high-current heating element with an operating voltage of 5V. Using a 5V low-voltage, high-current heating method falls within the safe voltage range, fundamentally improving the electrical safety of the equipment and reducing usage risks. Simultaneously, this heating method, combined with the direct contact heating element 10, results in high thermal efficiency and rapid temperature rise, quickly reaching and stabilizing at the set operating temperature, significantly shortening the production cycle and improving processing efficiency.
[0024] In some embodiments, the synthetic stone base 9, through its thermal insulation properties, concentrates the heat from the custom heating element 10 onto the hot-pressing surface. Synthetic stone material possesses excellent high-temperature resistance and extremely low thermal conductivity; its superior thermal insulation properties maximize the concentration and guidance of the heat generated by the custom heating element 10 to the lower hot-pressing surface, preventing heat loss upwards. This not only significantly improves heat utilization efficiency but, more importantly, protects the precision moving parts such as the upper slider 6 and guide rails, preventing deformation or damage due to heat and extending the equipment's service life.
[0025] In some embodiments, multiple floating mechanisms 4 and their corresponding hot stamping mechanisms 8 operate independently, allowing the hot pressing surface of each hot stamping mechanism 8 to adaptively maintain parallel contact with the surface of the workpiece being hot-stamped. Each hot stamping mechanism 8 is an independent "pressure control unit," capable of independent floating fine-tuning according to the actual conditions of its respective contact point during operation, without interfering with each other. This allows the device to automatically adapt to the slight unevenness inherent in the cell cover or ML film itself, ensuring consistent pressure and contact area at any contact point, ultimately achieving high uniformity in depth, width, and appearance of multiple hot stamping lines, greatly improving product yield and quality.
[0026] The workflow begins in standby mode, where the lifting module 2 raises the heating mechanism 8 to a high position, and the customized heating element 10 is energized and preheated to the set temperature. Subsequently, the drive device 1 drives the entire fixed base 3 to move smoothly upward through the lead screw 12. When the hot pressing surfaces of multiple heating mechanisms 8 are about to contact the bottom surface of the battery cell cover, each floating mechanism 4 begins to act independently. The slider 6, under the pressure of the elastic element 7, adaptively fine-tunes along the vertical guide rail 5 to ensure that all hot pressing surfaces can flatly adhere to the workpiece surface. Under constant temperature and uniform elastic pressure, the ML film completes the hot pressing bonding after a short period of pressure holding. Finally, the lifting module 2 descends and resets as a whole, and each heating mechanism 8 separates from the workpiece under the action of the elastic element 7, ready to enter the next work cycle.
[0027] This application utilizes a custom heating element 10 embedded in a synthetic stone base 9 for direct heating, replacing the traditional indirect heating mode of "heating rod-copper block". This method has the advantages of low thermal inertia, rapid heating, and fast thermal response, achieving precise control of the working temperature and effectively solving the problems of large temperature difference and inaccurate temperature control in traditional methods. This ensures a smooth and aesthetically pleasing surface after the ML film is heated. Each heating mechanism 8 is supported by an independent floating mechanism 4. The flexible pressure of the elastic element 7 allows each heating head to self-adjust and finely adjust, ensuring that multiple heating surfaces can be flat and adhered to the workpiece surface with uniform pressure, thereby significantly improving the consistency of multiple heating weld lines. The excellent heat insulation performance of the synthetic stone base 9 prevents heat transfer and protects precision moving parts. Furthermore, the modular installation of the heating element 10 makes overall replacement simple, greatly reducing maintenance costs and time.
[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 floating heating device for hot stamping of ML film, comprising a lifting module driven by a driving device, characterized in that, Also includes: A fixed base is fixedly mounted on the lifting end of the lifting module; Multiple floating mechanisms are disposed on the fixed base. Each floating mechanism includes a vertical guide rail, a slider, and an elastic element. The slider is slidably disposed on the vertical guide rail, and the elastic element provides upward elastic pressure to the slider. Multiple heat-pressing mechanisms are correspondingly arranged on the slider of the floating mechanism. Each heat-pressing mechanism includes a high-temperature resistant synthetic stone base and a customized heating element. The synthetic stone base has a receiving groove, and the customized heating element is fixedly embedded in the receiving groove.
2. The floating heating device for hot stamping of ML film according to claim 1, characterized in that, The lifting module includes a base, a lead screw, a threaded block, and guide blocks on both sides; the driving device is located on one side of the base, the lead screw is driven to rotate by the driving device, and the threaded block is screwed onto the lead screw; guide grooves are provided on both sides of the threaded block, and guide blocks are respectively provided on both sides of the base, with the guide grooves slidingly engaging with the guide blocks; the fixed seat is fixedly located on the outside of the threaded block.
3. The floating heating device for hot stamping of ML film according to claim 2, characterized in that, The driving device consists of a servo motor and a reducer. The servo motor is located on one side of the base, the reducer is connected to the output end of the servo motor, and the lead screw is connected to the output end of the reducer.
4. The floating heating device for hot stamping of ML film according to claim 1, characterized in that, The elastic element is a spring post, the upper end of which is connected to the lower part of the slider, and the lower end is fixedly connected to the fixed base.
5. The floating heating device for hot stamping of ML film according to claim 1, characterized in that, The customized heating element is a low-voltage, high-current heating element with a working voltage of 5V.
6. The floating heating device for hot stamping of ML film according to claim 1, characterized in that, The synthetic stone base, through its heat insulation properties, concentrates the heat from the customized heating element onto the hot-heating work surface.
7. The floating heating device for hot stamping of ML film according to claim 1, characterized in that, Multiple floating mechanisms and their corresponding hot stamping mechanisms operate independently, enabling the hot pressing surface of each hot stamping mechanism to adaptively maintain parallel contact with the surface of the workpiece being hot stamped.