Roller type preheating device for processing lithium battery diaphragm

Abstract

The invention discloses a roller-type preheating device for processing a lithium battery diaphragm, which relates to the technical field of diaphragm preheating, and comprises a rack, a servo motor fixed on one side of the rack, a motor fixed on the other side of the rack, and a motor fixed on the other side of the rack, and preheating rollers used for conveying the diaphragm are arranged in an inner cavity of the rack and staggered up and down; the roller type preheating of self-adaptive gradient temperature control, uniform heat exchange and stable temperature control of the lithium battery diaphragm is realized, the diaphragm preheating precision and the processing stability are greatly improved, the processing requirements of the lithium battery diaphragm are met, the circumferential heating of the preheating roller is uniform, the problem of local overheating or non-uniform preheating is avoided, the diaphragm preheating consistency is ensured, and the working efficiency is improved. And meanwhile, a hot oil valve and a cold water valve are linked to realize gradient heating and gradient cooling of large flow at the front section and small flow at the rear section, so that the rapid heating and cooling efficiency is guaranteed, diaphragm damage caused by temperature shock is avoided, temperature control is efficient, response is rapid, mixed flow of cold and hot media is effectively prevented, and stable operation of the system is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of diaphragm preheating technology, and in particular to a roller preheating device for lithium battery diaphragm processing. Background Technology

[0002] The roller preheating device for lithium battery separator processing is a core process equipment in the lithium-ion battery separator production line to realize online preheating of the separator, eliminate internal stress, and ensure the tensile flatness and dimensional stability of the separator. As lithium batteries develop towards higher safety and higher consistency, more stringent requirements are placed on the temperature controllability, heat exchange uniformity, and adaptive adjustment capability of the separator preheating process.

[0003] Currently, traditional diaphragm preheating rollers mostly use single steam or heat transfer oil fixed heating, without mechanical linkage automatic switching structure for hot and cold. The temperature rise rate during the heating process is uncontrollable, which can easily lead to excessively rapid heating, causing thermal wrinkles and shrinkage deformation of the diaphragm. After temperature overshoot, it is impossible to cool down quickly, resulting in large temperature fluctuations and difficulty in maintaining the process set temperature range stably. The heating and cooling components are fixedly arranged, and cannot adaptively adjust the fit with the inner wall of the roller according to the real-time temperature. The heat exchange area is fixed, which can easily cause local overheating or heat exchange blind spots on the roller surface. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing roller preheating devices for lithium battery separator processing, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that the rate of temperature rise during the heating process is uncontrollable, the temperature cannot be quickly cooled down after overshooting, the fit with the inner wall of the roller cannot be adaptively adjusted according to the real-time temperature, and the heat exchange area is fixed.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a roller preheating device for lithium battery separator processing, comprising: a frame, a preheating roller for conveying the separator is provided in the inner cavity of the frame, the preheating rollers are arranged alternately in the inner cavity of the frame, a servo motor is fixed to one side of the frame for driving the preheating roller to rotate, the output end of the servo motor is fixed to one end of the preheating roller, a preheating component is provided on the preheating roller, comprising: a preheating element is provided in the inner cavity of the preheating roller, an oil-water supply element is provided on the surface of the preheating roller, a rotating shell is provided in the inner cavity of the preheating roller, and teeth are fixed to one side of the rotating shell. The oil-water supply element provides a flow channel for heat transfer oil and cooling water, and the preheating element preheats the preheating roller by heating with heat transfer oil and cooling with cooling water.

[0008] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, wherein: an arc-shaped roller for adjusting the insertion angle of the membrane is rotatably connected to one side of the frame, and a pressure roller for adjusting the membrane tension is provided in the inner cavity of the frame, which is located at the top and bottom of the preheating roller respectively; cylinders are rotatably connected to both sides of the inner cavity of the frame, and connecting plates are rotatably connected to the telescopic ends of the cylinders; the connecting plates are rotatably connected to the top of the frame; and the two ends of the pressure rollers are rotatably connected to the connecting plates on both sides respectively.

[0009] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the preheating components include: a heat-insulating roller disposed in the inner cavity of the preheating roller; a bidirectional screw disposed in the inner cavity of the heat-insulating roller, with symmetrical threads of opposite directions on both sides of its surface; threaded sleeves symmetrically disposed at both ends of the bidirectional screw; a first support rod rotatably connected to the outer ring of the threaded sleeve, which is configured in four groups; a second support rod rotatably connected to the outer ring of the threaded sleeve and staggered with the first support rod; a heating plate rotatably connected to one end of the first support rod; a cooling plate rotatably connected to one end of the second support rod; a first torsion spring sleeved on one end of the bidirectional screw, with one end fixed to the inner wall of the heat-insulating roller and the other end fixed to the surface of the bidirectional screw; a drive gear sleeved on the other end of the bidirectional screw; a first flexible hose disposed at both ends of the heating plate for connecting two adjacent heating plates; and a second flexible hose disposed at both ends of the cooling plate for connecting two adjacent cooling plates.

[0010] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the heating plate and the cooling plate are both arranged in an arc shape and are arranged on the outer ring of the heat insulation roller, and the outer surfaces of the heating plate and the cooling plate are slidably connected to the inner wall of the preheating roller.

[0011] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the outer ring of the preheating roller is provided with a plurality of partitions for separating the heating plate and the cooling plate, and both ends of the heat insulation roller are provided with circular baffles that slide on the inner wall of the preheating roller.

[0012] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the oil and water supply components include: a cover, fixed to one end of the inner cavity of the preheating roller, the inner cavity of the cover being divided into two chambers: a cooling chamber and a heating chamber; a water wheel, rotatably connected to the two chambers of the inner cavity of the cover; an oil inlet pipe, connected to one side of the top of the cover, located at the top of the heating chamber; a hot oil valve, installed on the surface of the oil inlet pipe; an oil inlet collar, fixed to the oil inlet end of the oil inlet pipe; a water inlet pipe, connected to the other side of the top of the cover, located at the top of the cooling chamber; a cold water valve, installed on the surface of the water inlet pipe; a water inlet collar, fixed to the water inlet end of the water inlet pipe; a second torsion spring, respectively sleeved on the valve stems of the hot oil valve and the cold water valve; and a sector gear, fixed on the rotating shaft of the water wheel and located outside the cover.

[0013] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the surface of the heat insulation roller is provided with a heat-sensing element, which includes: a temperature-sensing alloy, an outer ring fixed to one side of the heat insulation roller, the outer ring being slidably connected to the inner wall of the preheating roller, a toothed plate fixed to the deformation end of the temperature-sensing alloy, and a pressure plate fixed to one side of the toothed plate.

[0014] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the outer ring of the heat insulation roller is provided with a movable hole, and the heat insulation roller is rotatably connected to one end of the inner cavity of the preheating roller through a bearing.

[0015] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, the inner cavity of the preheating roller is provided with an adjusting component, which includes: an airbag frame fixed to one side of the top of the inner cavity of the preheating roller, an arc-shaped airbag fixed to the inner cavity of the airbag frame, a sleeve communicating with one side of the arc-shaped airbag, a piston rod slidably connected to the inner wall of the sleeve, a spring sleeved on the outer ring of the piston rod, with one end fixed to the surface of the piston rod and the other end fixed to the inner wall of the sleeve, a pressing plate fixed to the bottom of the piston rod, and a limiting rod fixed to both sides of the bottom of the airbag frame, the limiting rod passing through the pressing plate and slidably connected to it.

[0016] As a preferred embodiment of the roller preheating device for lithium battery separator processing of the present invention, a sealing component is provided between the oil inlet pipe and the water inlet pipe. The sealing component includes: a connecting pipe that connects the oil inlet pipe and the water inlet pipe; a sealing column that is slidably connected to the inner cavity of the connecting pipe; and a spring piece that is fixed to the inner cavity of the connecting pipe, with one side of the spring piece fixed to the inner wall of the sealing column.

[0017] The beneficial effects of this invention are as follows: Through the coordinated design of the preheating roller and the preheating assembly, adaptive gradient temperature control, uniform heat exchange, and stable temperature control of the lithium battery separator are achieved through roller preheating, significantly improving the preheating accuracy and processing stability of the separator. This adapts to the processing requirements of lithium battery separators. The preheating assembly adopts a dual-medium mode of heating with heat transfer oil and cooling with cooling water. The arc-shaped heating plate and cooling plate are attached to the inner wall of the preheating roller, resulting in a large heat exchange contact area and high efficiency. This ensures uniform circumferential heating of the preheating roller, eliminating local overheating or uneven preheating problems, guaranteeing consistent preheating of the separator, and automatically... The system completes the switching between heating and cooling modes, and simultaneously links the hot oil valve and cold water valve to achieve gradient heating and cooling with a large flow rate at the front and a small flow rate at the back. This ensures rapid heating and cooling efficiency while avoiding damage to the diaphragm from sudden temperature changes. The temperature control is highly efficient and responsive. The sealing components automatically switch paths according to the oil and water pressure, effectively preventing the mixing of hot and cold media and ensuring stable system operation. The entire system achieves fully automatic adaptive temperature control with linkage between temperature sensing, media regulation, and heat exchange structure, requiring no manual intervention and significantly improving the quality and efficiency of lithium battery diaphragm preheating processing. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of a roller preheating device for lithium battery separator processing.

[0020] Figure 2 A cross-sectional view of a roller preheating device for lithium battery separator processing.

[0021] Figure 3 This is a structural diagram of the preheating roller and pressure roller in a roller-type preheating device for lithium battery separator processing.

[0022] Figure 4 A cross-sectional view of the preheating roller and pressure roller working together in a roller-type preheating device for lithium battery separator processing.

[0023] Figure 5 A partial cross-sectional view of the preheating component of a roller preheating device for lithium battery separator processing.

[0024] Figure 6 A partial structural cross-sectional view of the preheating components, oil / water supply components, and heat-sensing components of a roller preheating device for lithium battery separator processing.

[0025] Figure 7 Roller preheating device for lithium battery separator processing Figure 6 A magnified view of A in the middle.

[0026] Figure 8 An exploded cross-sectional view of a portion of the preheating component of a roller preheating device for lithium battery separator processing.

[0027] Figure 9 Exploded cross-sectional view of a portion of the preheating components, oil / water supply components, and heat-sensing components of a roller preheating device for lithium battery separator processing.

[0028] Figure 10 A partial structural diagram of the preheating and adjusting components of a roller preheating device for lithium battery separator processing.

[0029] Figure 11 Roller preheating device for lithium battery separator processing Figure 10 A magnified view of B in the middle.

[0030] In the diagram: 1. Frame; 2. Servo motor; 3. Preheating roller; 4. Arc roller; 5. Pressure roller; 6. Connecting plate; 7. Cylinder; 8. Preheating assembly; 81. Preheating component; 811. Heat insulation roller; 812. Heating plate; 813. Cooling plate; 814. Bidirectional screw; 815. First torsion spring; 816. Drive gear; 817. Threaded sleeve; 818. First support rod; 819. First hose; 8110. Second support rod; 8111. Second hose; 8112. Moving hole; 82. Oil and water supply component; 821. Cover; 822. Water wheel; 823. Oil inlet pipe; 8 24. Oil inlet collar; 825. Water inlet collar; 826. Hot oil valve; 827. Water inlet pipe; 828. Cold water valve; 829. Second torsion spring; 8210. Sector gear; 83. Thermal sensing element; 831. Temperature sensing alloy; 832. Pressure plate; 833. Gear plate; 84. Adjusting element; 841. Airbag frame; 842. Arc-shaped airbag; 843. Sleeve; 844. Piston rod; 845. Spring; 846. Press plate; 847. Limiting rod; 85. Rotating shell; 86. Gear; 87. Sealing element; 871. Connecting pipe; 872. Sealing post; 873. Spring. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1, referring to Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a roller preheating device for lithium battery separator processing. The roller preheating device for lithium battery separator processing includes a frame 1, a servo motor 2 and a preheating component 8.

[0035] Specifically, the frame 1 has a preheating roller 3 for conveying the diaphragm inside its cavity. The preheating rollers 3 are arranged alternately in the cavity of the frame 1. A servo motor 2 is fixed to one side of the frame 1 to drive the preheating rollers 3 to rotate, and its output end is fixed to one end of the preheating rollers 3.

[0036] The frame 1 is made of high-strength steel, with a stable structure and strong load-bearing capacity. The preheating rollers 3 are installed in an alternating manner in the inner cavity, providing a working framework for the conveying and preheating of lithium battery separators.

[0037] Servo motor 2 is a high-precision servo drive motor with stable speed and sufficient torque. It is fixed on one side of the frame 1 and can drive the preheating roller 3 to rotate at a uniform speed to ensure smooth conveying of the diaphragm.

[0038] The preheating roller 3 is made of thermally conductive metal, with a smooth inner wall and high heat exchange efficiency. It is arranged alternately in the inner cavity of the frame 1 to provide preheating support and heat exchange surface for the lithium battery separator.

[0039] Specifically, the preheating component 8 is disposed on the preheating roller 3, and includes a preheating element 81 disposed in the inner cavity of the preheating roller 3, an oil-water supply element 82 disposed on the surface of the preheating roller 3, a rotating shell 85 disposed in the inner cavity of the preheating roller 3, and teeth 86 fixed on the outer ring of one side of the rotating shell 85. The oil-water supply element 82 provides a flow channel for heat transfer oil and cooling water. The preheating element 81 preheats the preheating roller 3 by heating with heat transfer oil and cooling with cooling water. The teeth 86 are made of wear-resistant metal teeth material and are uniformly fixed on the outer ring of the rotating shell 85, meshing with the sector gear 8210 to realize reciprocating oscillating transmission.

[0040] Example 2, refer to Figures 2-11 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0041] Specifically, it also includes an arc-shaped roller 4 rotatably connected to one side of the frame 1 for adjusting the film infeed angle, a pressure roller 5 for adjusting the diaphragm tension set in the inner cavity of the frame 1, which are located at the top and bottom of the preheating roller 3 respectively, a cylinder 7 rotatably connected to both sides of the inner cavity of the frame 1, a connecting plate 6 rotatably connected to the telescopic end of the cylinder 7, the connecting plate 6 rotatably connected to the top of the frame 1, and the two ends of the pressure roller 5 rotatably connected to the connecting plates 6 on both sides respectively.

[0042] The pressure roller 5 is made of flexible and wear-resistant roller material, and its two ends are rotatably connected to the connecting plate 6. It can adaptively adjust the diaphragm tension and prevent wrinkles and deviations during diaphragm conveying.

[0043] Specifically, the preheating component 81 includes: a heat insulation roller 811, which is disposed in the inner cavity of the preheating roller 3. The heat insulation roller 811 is made of high temperature resistant heat insulation material and is rotatably connected to the inner cavity of the preheating roller 3. It can separate the heating and cooling areas and reduce mutual heat interference; a bidirectional screw 814, which is disposed in the inner cavity of the heat insulation roller 811. Symmetrical threads with opposite directions are provided on both sides of its surface; a threaded sleeve 817, which is symmetrically disposed at both ends of the bidirectional screw 814; and a first support rod 818, which is rotatably connected to the outer ring of the threaded sleeve 817. There are four sets of these first support rods.

[0044] The second support rod 8110 is rotatably connected to the outer ring of the threaded sleeve 817 and is staggered with the first support rod 818. The heating plate 812 is rotatably connected to one end of the first support rod 818. The first support rod 818 is made of rigid metal support rod material and is arranged in four staggered sets. It is rotatably connected between the threaded sleeve 817 and the heating plate 812 and can drive the heating plate 812 to extend and retract. The cooling plate 813 is rotatably connected to one end of the second support rod 8110. The first torsion spring 815 is sleeved on one end of the bidirectional screw 814 and its one end is fixed to the inner wall of the heat insulation roller 811. The first torsion spring 815 is made of 65Mn high temperature resistant spring steel material, with stable torque and fatigue resistance. It can drive the bidirectional screw 814 to swing back and forth, so as to realize the uniform swing heating of the heating plate 812.

[0045] The heating plate 812 is made of arc-shaped heat-conducting metal, with its inner wall connected to the first flexible hose 819. Heat transfer oil flows through the hose to heat the preheating roller 3. The other end is fixed to the surface of the bidirectional screw 814, and the drive gear 816 is sleeved on the other end of the bidirectional screw 814. The first flexible hose 819, located at both ends of the heating plate 812, connects adjacent heating plates 812. Made of high-temperature and pressure-resistant material, the first flexible hose 819 connects adjacent heating plates 812 in series, ensuring uniform flow of heat transfer oil and improving heating uniformity. The second flexible hose 8111 is located at the cooling... The two ends of plate 813 are used to connect two adjacent cooling plates 813. The second support rod 8110 is made of rigid metal support rod material and is staggered with the first support rod 818. It is rotatably connected between the threaded sleeve 817 and the cooling plate 813, which can drive the cooling plate 813 to extend and retract. The cooling plate 813 is made of arc-shaped heat-conducting metal material, and the inner wall is connected to the second hose 8111. The cooling water flow realizes the temperature control of the preheating roller 3. The second hose 8111 is made of low temperature and pressure resistant hose material and is connected in series with adjacent cooling plates 813 to ensure uniform flow of cooling water and improve cooling uniformity.

[0046] Specifically, the heating plate 812 and the cooling plate 813 are both arranged in an arc shape and are located on the outer ring of the heat insulation roller 811. The outer surfaces of the heating plate 812 and the cooling plate 813 are slidably connected to the inner wall of the preheating roller 3.

[0047] Specifically, the outer ring of the preheating roller 3 is provided with multiple partitions for separating the heating plate 812 and the cooling plate 813, and both ends of the heat insulation roller 811 are provided with circular baffles that slide on the inner wall of the preheating roller 3.

[0048] Specifically, the oil-water supply component 82 includes: a cover 821, fixed to one end of the inner cavity of the preheating roller 3, the inner cavity of the cover 821 being divided into two chambers: a cooling chamber and a heating chamber, the cover 821 being made of a sealing and heat-insulating material, which can separate the oil and water media and prevent the media from mixing and flowing through; and a water wheel 822, rotatably connected to the two chambers of the inner cavity of the cover 821, the water wheel 822 being made of a wear-resistant impeller material, rotatably connected to the two chambers of the cover 821, and can rotate under the impact of oil or water flow, driving the sector gear 8210 to rotate.

[0049] The oil inlet pipe 823 is connected to one side of the top of the cover 821 and is located at the top of the heating chamber. The oil inlet pipe 823 is made of high temperature and pressure resistant oil pipe material and connects the heating chamber with the heating plate 812 to provide a flow channel for heat transfer oil. The hot oil valve 826 is installed on the surface of the oil inlet pipe 823. The oil inlet sleeve 824 is made of sealing metal material and is fixed to the end of the oil inlet pipe 823. It can be connected to external heat transfer oil supply equipment to ensure the oil circuit is sealed. The oil inlet sleeve 824 is divided into two parts: a fixed end and a rotating end. The fixed end is connected to the inlet of the oil inlet pipe 823, and the rotating end is rotatably connected to the fixed end through a bearing. The inlet of the rotating end is connected to the external hot oil furnace through an oil pump. The fixed end and the oil inlet end of the oil inlet sleeve 824 are the same as the axis of the preheating roller 3 and are fixed to the oil inlet end of the oil inlet pipe 823.

[0050] A water inlet pipe 827 is connected to the other side of the top of the cover 821 and is located at the top of the cooling chamber. A cold water valve 828 is installed on the surface of the water inlet pipe 827. A water inlet collar 825 has the same structure as the oil inlet collar 824. The input end of the water inlet collar 825 is connected to the external cooling water through a water pump and is fixed to the water inlet end of the water inlet pipe 827. A second torsion spring 829 is respectively sleeved on the valve stems of the hot oil valve 826 and the cold water valve 828. A sector gear 8210 is fixed on the rotating shaft of the water wheel 822 and is located outside the cover 821.

[0051] Specifically, the surface of the heat insulation roller 811 is provided with a heat-sensing element 83, which includes: a temperature-sensing alloy 831, an outer ring fixed to one side of the heat insulation roller 811, the outer ring being slidably connected to the inner wall of the preheating roller 3; a toothed plate 833, fixed to the deformation end of the temperature-sensing alloy 831; and a pressure plate 832, fixed to one side of the toothed plate 833. The temperature-sensing alloy 831 is made of bimetallic temperature-sensing material, which is sensitive to heat deformation and is fixed to the outer ring of the heat insulation roller 811, and can sense the temperature change of the preheating roller 3.

[0052] Specifically, the outer ring of the heat insulation roller 811 has a moving hole 8112. The moving hole 8112 adopts a precision grooving process and has a smooth inner wall without burrs, providing space for the movement of the first support rod 818 and the second support rod 8110. The heat insulation roller 811 is rotatably connected to one end of the inner cavity of the preheating roller 3 through a bearing.

[0053] Specifically, the inner cavity of the preheating roller 3 is provided with an adjusting component 84, which includes: an airbag frame 841, fixed to one side of the top of the inner cavity of the preheating roller 3; an arc-shaped airbag 842, fixed to the inner cavity of the airbag frame 841; a sleeve 843, connected to one side of the arc-shaped airbag 842; a piston rod 844, slidably connected to the inner wall of the sleeve 843; and a spring 845, sleeved on the outer ring of the piston rod 844, with one end fixed to the surface of the piston rod 844 and the other end fixed to the inner wall of the sleeve 843.

[0054] Press plate 846 is fixed to the bottom of piston rod 844. Limiting rod 847 is fixed to both sides of the bottom of airbag frame 841. Airbag frame 841 is made of hard sealing material and is fixed to the inner cavity of preheating roller 3 to provide a stable installation space for arc-shaped airbag 842. Limiting rod 847 passes through press plate 846 and is slidably connected to it. Limiting rod 847 is made of smooth metal rod material and passes through press plate 846 to provide vertical sliding guide for press plate 846 and prevent offset and jamming.

[0055] Both sides of the bottom of the push plate 846 are fixed with rubber protrusions for pressing the valve stem, which can buffer when pressing the valve stem and prevent damage to the valve stem. The pressure plate 832 is made of hard metal and is fixed to one side of the toothed plate 833. It can squeeze the arc-shaped air bag 842 to trigger the flow regulation action. The toothed plate 833 is made of wear-resistant metal toothed plate and is fixed to the deformable end of the temperature-sensitive alloy 831. It meshes with the drive gear 816 and drives the bidirectional screw 814 to rotate. The arc-shaped air bag 842 is made of flexible elastic material, with good sealing performance and excellent extensibility. When compressed, it can push the piston rod 844 to move down.

[0056] Specifically, a sealing component 87 is provided between the oil inlet pipe 823 and the water inlet pipe 827. The sealing component 87 includes: a connecting pipe 871, which connects the oil inlet pipe 823 and the water inlet pipe 827; a sealing column 872, which is slidably connected to the inner cavity of the connecting pipe 871; and a spring plate 873, which is fixed to the inner cavity of the connecting pipe 871. One side of the spring plate 873 is fixed to the inner wall of the sealing column 872. The spring plate 873 is made of 65Mn spring steel, which is elastic, stable, and timely in resetting. It is fixed to the inner cavity of the connecting pipe 871 and can drive the sealing column 872 to automatically reset and seal.

[0057] Example 3, referring to Figures 2-11 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0058] Specifically, the heating plate 812 is connected in series through the first flexible hose 819 and finally led out of the preheating roller 3 through a pipe. The bottom of the cover 821 located in the heating chamber is connected to the inlet of the heating plate 812 through a pipe.

[0059] Specifically, the cooling plate 813 is connected in series through the second flexible hose 8111 and finally led out of the preheating roller 3 through a pipe. The bottom of the cover 821 located in the cooling chamber is connected to the inlet end of the cooling plate 813 through a pipe.

[0060] Specifically, the surface of the pressure plate 832 is slidably connected to the surface of the arc-shaped airbag 842, the rotating shell 85 is fixed to one side of the heat insulation roller 811, and the drive gear 816 is located in the inner cavity of the rotating shell 85.

[0061] Specifically, the arc roller 4 is set into four groups, which can adjust different diaphragm insertion angles according to needs.

[0062] During use, the frame 1, preheating roller 3, and preheating component 8 are in the initial standby state. The preheating roller 3 inside the frame 1 is arranged alternately, the servo motor 2 is in standby mode, the arc roller 4 and pressure roller 5 are at the initial angle, the cylinder 7 is contracted, the connecting plate 6 is not swinging, the heat insulation roller 811 is stationary, the heating plate 812 is attached to the inner wall of the preheating roller 3, the cooling plate 813 is away from the inner wall of the preheating roller 3, the bidirectional screw 814 is stationary, the first torsion spring 815 is naturally extended, and the drive gear 816 and threaded sleeve 817 have no displacement.

[0063] Hot oil valve 826 is open, cold water valve 828 is closed, second torsion spring 829 is charged, water wheel 822 and sector gear 8210 are stationary, temperature sensing alloy 831 has no thermal deformation, toothed plate 833 and pressure plate 832 are in the initial position, arc-shaped airbag 842 is naturally extended, piston rod 844 and push plate 846 are not activated, spring 845 is extended, and sealing column 872 is positioned between oil inlet pipe 823 and water inlet pipe 827 under the action of spring 873. Spring 845 is made of 65Mn spring steel, with stable elasticity and timely reset. It is sleeved on the outer ring of piston rod 844 and can drive piston rod 844 to automatically reset.

[0064] The lithium battery separator is adjusted at the entry angle by the arc roller 4 and passes around the surface of the preheating roller 3 arranged in an alternating manner. The cylinder 7 is started, and the telescopic end pushes the connecting plate 6 to swing, which drives the pressure roller 5 to move and adaptively adjust the separator tension to ensure that the separator is transported smoothly. The servo motor 2 is started to drive the preheating roller 3 to rotate, which drives the separator to be transported forward at a uniform speed.

[0065] The heat transfer oil flows into the heating chamber of the cover 821 through the oil inlet sleeve 824 and the oil inlet pipe 823. The oil flow pressure pushes the sealing column 872 to move along the connecting pipe 871, and the spring 873 is compressed. The end of the sealing column 872 completely seals the water inlet pipe 827, preventing the cooling water from entering.

[0066] The heat transfer oil flows into the heating plate 812 through the pipeline and circulates in series through the first hose 819. The heating plate 812 is in contact with the inner wall of the preheating roller 3 for heat exchange, heating the preheating roller 3 and realizing the preheating of the diaphragm surface. The impact force of the oil drives the water wheel 822 in the heating chamber to rotate, which drives the sector gear 8210 to rotate synchronously.

[0067] The sector gear 8210 meshes with the teeth 86 on the outer ring of the rotating shell 85, driving the rotating shell 85 and the heat insulation roller 811 to rotate. The first torsion spring 815 twists and stores energy. When the sector gear 8210 disengages from the teeth 86, the first torsion spring 815 resets and drives the heat insulation roller 811 to swing back, realizing the reciprocating swing of the heating plate 812 and uniformly heating the inner wall of the preheating roller 3.

[0068] As the temperature of the preheating roller 3 continues to rise, the temperature-sensitive alloy 831 deforms due to the heat, causing the toothed plate 833 and the pressure plate 832 to move synchronously. The toothed plate 833 meshes with the drive gear 816, driving the bidirectional screw 814 to rotate, while the threaded sleeves 817 on both sides move in opposite directions.

[0069] The threaded sleeve 817 drives the first support rod 818 to retract inward, the heating plate 812 gradually detaches from the inner wall of the preheating roller 3, and at the same time the second support rod 8110 expands outward, the cooling plate 813 gradually approaches the inner wall of the preheating roller 3, the pressure plate 832 simultaneously squeezes the arc-shaped air bag 842, the air pressure in the arc-shaped air bag 842 increases and pushes the piston rod 844 downward, the spring 845 is compressed, the pressing plate 846 presses down the valve rod, the hot oil valve 826 gradually closes and the cold water valve 828 gradually opens, the second torsion spring 829 twists, at this time the water inlet pipe 827 is still blocked, and the cooling water does not circulate temporarily.

[0070] As the hot oil valve 826 is gradually closed, the oil flow rate in the heating plate 812 decreases, and the heating speed gradually decreases, forming a heating mode of rapid heating with a large flow rate in the front and stable temperature with a small flow rate in the back. The temperature of the preheating roller 3 rises evenly, preventing the diaphragm from wrinkling or deforming due to excessive heating.

[0071] When the temperature-sensitive alloy 831 deforms to its maximum value, the preheating roller 3 reaches the preset process temperature, the hot oil valve 826 is completely closed, the cold water valve 828 is opened to its maximum, the oil pressure in the oil inlet pipe 823 disappears, the spring 873 resets and drives the sealing column 872 to move back, sealing the oil inlet pipe 823 and opening the water inlet pipe 827. Cooling water flows into the cooling chamber of the cover 821 through the water inlet collar 825 and the water inlet pipe 827. The water flow impacts the blades of the water wheel 822 inside the cooling chamber, still driving the sector gear 8210 to rotate. The water flows into the cooling plate 813 through the pipe and the second hose 8111, cooling the preheating roller 3 at the maximum flow rate.

[0072] As the temperature of the preheating roller 3 gradually decreases, the temperature-sensitive alloy 831 slowly returns to its original position, the toothed plate 833 and the pressure plate 832 move back, and the arc-shaped airbag 842 and the piston rod 844 return to their original position under the action of the spring 845. The cooling water valve 828 gradually closes under the action of the second torsion spring 829, and the cooling water flow rate decreases, forming a cooling mode of rapid cooling with a large flow rate in the front and constant temperature with a small flow rate in the back, ensuring that the temperature of the preheating roller 3 remains stable within the process range.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A roller preheating device for lithium battery separator processing, characterized in that: include, The frame (1) has a preheating roller (3) inside its cavity for conveying the diaphragm. The preheating rollers (3) are arranged alternately in the cavity of the frame (1). A servo motor (2) is fixed to one side of the frame (1) and is used to drive the preheating roller (3) to rotate. Its output end is fixed to one end of the preheating roller (3). The preheating assembly (8), disposed on the preheating roller (3), includes, The preheating component (81) is located in the inner cavity of the preheating roller (3). Oil and water supply component (82) is disposed on the surface of preheating roller (3). The rotating shell (85) is located inside the preheating roller (3). The teeth (86) are fixed to the outer ring on one side of the rotating shell (85). Among them, the oil-water supply component (82) provides a flow channel for heat transfer oil and cooling water, and the preheating component (81) preheats the preheating roller (3) by heating with heat transfer oil and cooling with cooling water.

2. The roller preheating device for lithium battery separator processing as described in claim 1, characterized in that: An arc-shaped roller (4) for adjusting the film insertion angle is rotatably connected to one side of the frame (1). A pressure roller (5) for adjusting the diaphragm tension is provided in the inner cavity of the frame (1). The pressure roller (5) is located at the top and bottom of the preheating roller (3). A cylinder (7) is rotatably connected to both sides of the inner cavity of the frame (1). A connecting plate (6) is rotatably connected to the telescopic end of the cylinder (7). The connecting plate (6) is rotatably connected to the top of the frame (1). The two ends of the pressure roller (5) are rotatably connected to the connecting plates (6) on both sides.

3. The roller preheating device for lithium battery separator processing as described in claim 1, characterized in that: The preheating component (81) includes: The heat insulation roller (811) is located inside the preheating roller (3). A bidirectional screw (814) is disposed in the inner cavity of the heat insulation roller (811), and symmetrical threads with opposite directions are provided on both sides of its surface. Threaded sleeves (817) are symmetrically arranged at both ends of the double-acting screw (814). The first support rod (818) is rotatably connected to the outer ring of the threaded sleeve (817), and it is configured in four sets. The second support rod (8110) is rotatably connected to the outer ring of the threaded sleeve (817) and is arranged alternately with the first support rod (818). The heating plate (812) is rotatably connected to one end of the first support rod (818). The cooling plate (813) is rotatably connected to one end of the second support rod (8110). A first torsion spring (815) is sleeved on one end of the double-acting screw (814), with one end fixed to the inner wall of the heat insulation roller (811) and the other end fixed to the surface of the double-acting screw (814). The drive gear (816) is sleeved on the other end of the double-acting screw (814). The first flexible hose (819) is disposed at both ends of the heating plate (812) and is used to connect two adjacent heating plates (812). The second hose (8111) is located at both ends of the cooling plate (813) and is used to connect two adjacent cooling plates (813).

4. The roller preheating device for lithium battery separator processing as described in claim 3, characterized in that: The heating plate (812) and cooling plate (813) are both arranged in an arc shape and are located on the outer ring of the heat insulation roller (811). The outer surfaces of the heating plate (812) and cooling plate (813) are slidably connected to the inner wall of the preheating roller (3).

5. The roller preheating device for lithium battery separator processing as described in claim 3 or 4, characterized in that: The outer ring of the preheating roller (3) is provided with multiple partitions for separating the heating plate (812) and the cooling plate (813), and both ends of the heat insulation roller (811) are provided with circular baffles that slide on the inner wall of the preheating roller (3).

6. The roller preheating device for lithium battery separator processing as described in claim 5, characterized in that: Oil and water supply component (82) includes: The cover (821) is fixed to one end of the inner cavity of the preheating roller (3). The inner cavity of the cover (821) is divided into two chambers: a cooling chamber and a heating chamber. The waterwheel (822) is rotatably connected to two chambers inside the casing (821). The oil inlet pipe (823) is connected to one side of the top of the casing (821), and it is located at the top of the heating chamber. Hot oil valve (826) is installed on the surface of oil inlet pipe (823). The oil inlet sleeve (824) is fixed to the oil inlet end of the oil inlet pipe (823). The water inlet pipe (827) connects to the other side of the top of the casing (821), and is located at the top of the cooling chamber. The cold water valve (828) is installed on the surface of the inlet pipe (827). The inlet collar (825) is fixed to the inlet end of the inlet pipe (827). The second torsion spring (829) is respectively sleeved on the valve stem of the hot oil valve (826) and the cold water valve (828). The sector gear (8210) is fixed on the rotating shaft of the water wheel (822) and located outside the casing (821).

7. The roller preheating device for lithium battery separator processing as described in claim 3, characterized in that: The surface of the heat-insulating roller (811) is provided with a heat-sensing element (83), the heat-sensing element (83) including: A temperature-sensitive alloy (831) is fixed to the outer ring on one side of the heat insulation roller (811), and its outer ring is slidably connected to the inner wall of the preheating roller (3). The toothed plate (833) is fixed to the deformed end of the temperature-sensitive alloy (831). The pressure plate (832) is fixed to one side of the toothed plate (833).

8. The roller preheating device for lithium battery separator processing as described in claim 3 or 7, characterized in that: The outer ring of the heat insulation roller (811) has a movable hole (8112), and the heat insulation roller (811) is rotatably connected to one end of the inner cavity of the preheating roller (3) through a bearing.

9. The roller preheating device for lithium battery separator processing as claimed in claim 1, characterized in that: The inner cavity of the preheating roller (3) is provided with an adjusting member (84), which includes: The airbag frame (841) is fixed to one side of the top of the preheating roller (3). An arc-shaped airbag (842) is fixed inside the airbag frame (841). The cannula (843) is connected to one side of the arc-shaped airbag (842). The piston rod (844) is slidably connected to the inner wall of the sleeve (843). A spring (845) is fitted onto the outer ring of the piston rod (844), with one end fixed to the surface of the piston rod (844) and the other end fixed to the inner wall of the sleeve (843). The push plate (846) is fixed to the bottom of the piston rod (844). Limiting rods (847) are fixed on both sides of the bottom of the airbag frame (841). The limiting rods (847) pass through the push plate (846) and are slidably connected to it.

10. The roller preheating device for lithium battery separator processing as claimed in claim 9, characterized in that: A sealing element (87) is provided between the oil inlet pipe (823) and the water inlet pipe (827). The sealing element (87) includes: A connecting pipe (871) connects the oil inlet pipe (823) and the water inlet pipe (827). The sealing column (872) is slidably connected to the inner cavity of the connecting tube (871). The spring clip (873) is fixed in the inner cavity of the connecting tube (871), and one side of the spring clip (873) is fixed to the inner wall of the sealing column (872).

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