Lithium strip low-temperature finish rolling mechanism

Abstract

The utility model provides a lithium strip low-temperature finish rolling mechanism which comprises a mounting plate, an unwinding roller for unwinding a lithium strip, a tensioning roller, two compression roller assemblies for reducing the surface temperature of the lithium strip and a rolling assembly for rolling the lithium strip are mounted on the surface of the mounting plate from top to bottom, and a heat preservation shell is mounted on the front face of the mounting plate. The unwinding roller, the tensioning roller and the pressing roller assembly are all located in the heat preservation shell, a heat preservation door is hinged to the front face of the heat preservation shell, an air cooler is installed on one side of the heat preservation shell, and an exhaust fan is installed on the other side of the heat preservation shell. The lithium strip is rolled and thinned through the calendering assembly after passing through the two compression roller assemblies, when the lithium strip passes through the compression roller assemblies, the temperature of the lithium strip passing through the surfaces of the compression roller bodies can be reduced through a circulating refrigerant arranged in the compression roller assemblies, and the situation that the ductility of the lithium strip is affected due to temperature rise is avoided; in this way, the temperature during rolling of the lithium strip can be effectively reduced, and then the lithium strip machining efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium strip rolling, and particularly relates to a lithium strip low-temperature finishing rolling mechanism. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. Lithium ribbon is mainly used in the production process of lithium batteries. Lithium ribbon needs to be processed and rolled before use. Currently, lithium ribbon rolling on the market mainly uses lithium ribbon finishing mills to cooperate with the processing and thinning of lithium ribbon. However, existing finishing mills have certain shortcomings when used: the roller speed cannot be too high. Too high a speed will generate a lot of heat, resulting in poor ductility of the lithium ribbon (lithium's melting point is too low and its internal atomic structure will have irregular changes), making it difficult to control the direction of extension, resulting in irregular extension such as edge breakage, material shortage, and material piling, which seriously affect its processing efficiency. However, slowing down the roller speed will affect the lithium ribbon rolling efficiency, reducing the factory's processing efficiency. Based on this, we have developed a finishing rolling mechanism that can solve the problems of material shortage, material piling, and edge breakage caused by the heat generated during the rolling process of lithium ribbon, which can improve the processing efficiency of lithium ribbon rolling and thinning. Utility Model Content

[0003] The purpose of the utility model is to provide a lithium strip low-temperature finishing rolling mechanism, aiming to solve the problems raised in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-temperature finishing rolling mechanism for lithium strip, comprising a mounting plate, on the surface of which are mounted from top to bottom an unwinding roller for unwinding the lithium strip, a tensioning roller, two pressure roller assemblies for reducing the surface temperature of the lithium strip, and a rolling assembly for rolling the lithium strip; an insulation shell is mounted on the front of the mounting plate, the unwinding roller, tensioning roller and pressure roller assembly are all located inside the insulation shell, an insulation door is hinged on the front of the insulation shell, an air cooler is mounted on one side of the insulation shell, an exhaust fan is mounted on the other side of the insulation shell, a temperature sensor and a wind speed sensor are respectively mounted on both sides of the insulation shell, the detection probe of the wind speed sensor is located directly above the air outlet of the air cooler, and two air knives are also mounted on the surface of the mounting plate, the two air knives are respectively located at the bottom of the two corresponding side surfaces of the pressure roller assemblies.

[0005] As a preferred technical solution of the present invention, the pressure roller assembly includes a mounting seat installed on the surface of the mounting plate, bearings are installed on both sides of the mounting seat, a roller core is installed between the two bearings, a spiral groove is provided on the surface of the roller core, a circulation cavity is provided inside the roller core, an opening is provided at one end of the roller core that passes through the circulation cavity, a connecting pipe is inserted in the circulation cavity, one end of the connecting pipe is connected to a rotary joint, the rotary joint blocks the opening, an inlet pipe and a return pipe are provided on the surface of the rotary joint, an inlet and an outlet that pass through the circulation cavity are respectively provided at both ends of the spiral groove, and a pressure roller body is sleeved on the outside of the roller core.

[0006] As a preferred technical solution of the present invention, sealing grooves are provided on both end surfaces of the roller core, and O-rings are installed in the sealing grooves.

[0007] As a preferred technical solution of the present invention, the calendering assembly is composed of two cooling rollers installed on the front side of the mounting plate. The two cooling rollers are arranged correspondingly, and the cooling rollers are located at the bottom end of the insulation shell.

[0008] As an optimal technical solution of the present invention, a first wind shield is installed on the top of the air cooler at the air outlet, and a second wind shield is installed on the inner wall of one side of the insulation shell. The second wind shield is located at the top of the air cooler, and the first wind shield and the second wind shield form an air duct blowing toward the surface of the lithium belt.

[0009] As a preferred technical solution of the present invention, the insulation shell is a corrugated insulation shell, and a plastic plate is installed on the back of the mounting plate.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the temperature inside the insulation shell can be reduced by the provided air cooler, and the air duct formed by the air cooler in conjunction with the first wind shield and the second wind shield can blow cold air to the surface of the lithium strip that has just been unwound, thereby reducing the temperature of the surface of the lithium strip. After the lithium strip passes through the two roller assemblies, it is rolled and thinned by the calendering assembly. When the lithium strip passes through the roller assembly, the circulating refrigerant provided inside the roller assembly can reduce the temperature of the lithium strip passing through the surface of the roller body, thereby avoiding the influence of the temperature increase on the ductility of the lithium strip. In this way, the temperature of the lithium strip during rolling can be effectively reduced, thereby improving the efficiency of lithium strip processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the split structure of the pressure roller assembly of the utility model;

[0015] Figure 4 This is a schematic cross-sectional view of the pressure roller assembly of the present invention.

[0016] In the figure: 1. Mounting plate; 2. Unwinding roller; 3. Tensioning roller; 4. Pressing roller assembly; 41. Mounting seat; 42. Bearing; 43. Roller core; 44. Spiral groove; 45. Connecting pipe; 46. Rotary joint; 47. Inlet pipe; 48. Return pipe; 49. Inlet; 410. Outlet; 411. Pressing roller body; 412. Sealing groove; 413. O-ring; 5. Calendering assembly; 6. Insulation shell; 7. Insulation door; 8. Air cooler; 9. Exhaust fan; 10. Temperature sensor; 11. Wind speed sensor; 12. Wind knife; 13. First wind shield; 14. Second wind shield; 15. Plastic plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figures 1-4 The utility model provides the following technical solutions: a lithium strip low-temperature finishing rolling mechanism, comprising a mounting plate 1, on the surface of the mounting plate 1 are mounted an unwinding roller 2 for unwinding the lithium strip, a tensioning roller 3, two pressure roller assemblies 4 for reducing the surface temperature of the lithium strip, and a rolling assembly 5 for rolling the lithium strip, an insulation shell 6 is mounted on the front of the mounting plate 1, the unwinding roller 2, the tensioning roller 3 and the pressure roller assembly 4 are all located inside the insulation shell 6, an insulation door 7 is hinged on the front of the insulation shell 6, an air cooler 8 is mounted on one side of the insulation shell 6, an exhaust fan 9 is mounted on the other side of the insulation shell 6, a temperature sensor 10 and a wind speed sensor 11 are respectively mounted on both sides of the insulation shell 6, the detection probe of the wind speed sensor 11 is located directly above the air outlet of the air cooler 8, and two air knives 12 are also mounted on the surface of the mounting plate 1, and the two air knives 12 are respectively located at the bottom of the two corresponding side surfaces of the pressure roller assemblies 4.

[0019] In this embodiment, the pressure roller assembly 4 includes a mounting base 41 mounted on the surface of the mounting plate 1, bearings 42 are mounted on both sides of the mounting base 41, a roller core 43 is mounted between the two bearings 42, a spiral groove 44 is provided on the surface of the roller core 43, a circulation cavity is provided inside the roller core 43, an opening passing through the circulation cavity is provided at one end of the roller core 43, a connecting pipe 45 is inserted into the circulation cavity, one end of the connecting pipe 45 is connected to the rotary joint 46, the rotary joint 46 blocks the opening, an inlet pipe 47 and a return pipe 48 are provided on the surface of the rotary joint 46, an inlet 49 and an outlet 410 passing through the circulation cavity are respectively provided at both ends of the spiral groove 44, and a pressure roller body 411 is sleeved on the outside of the roller core 43.

[0020] Specifically, the refrigerant enters the connecting pipe 45 through the inlet pipe 47 and flows into the circulation cavity, then the refrigerant enters the spiral groove 44 through the inlet 49 and flows back to the circulation cavity through the outlet 410, and then flows back again through the connecting pipe 45 and the return pipe 48, thereby realizing the refrigerant circulation, and then the circulating refrigerant can reduce the temperature of the surface of the roller body 411, and then the temperature of the lithium strip can be reduced when the lithium strip passes through the surface of the roller body 411, thereby avoiding the temperature increase affecting the ductility of the lithium strip, so that there is no need to reduce the rotation speed of the roller assembly 4, and thus the processing efficiency of the lithium strip can be improved in this way.

[0021] In this embodiment, sealing grooves 412 are formed on both end surfaces of the roller core 43 , and O-rings 413 are installed in the sealing grooves 412 .

[0022] Specifically, the sealing groove 412 cooperates with the O-ring 413 to improve the sealing performance between the roller core 43 and the roller body 411, thereby preventing the refrigerant from leaking out.

[0023] In this embodiment, the calendering assembly 5 is composed of two cooling rollers installed on the front side of the mounting plate 1 . The two cooling rollers are arranged correspondingly, and the cooling rollers are located at the bottom end of the insulation shell 6 .

[0024] Specifically, the surface temperature of the lithium strip can be lowered when the lithium strip is rolled by the provided cooling roller, thereby improving the processing effect of the lithium strip.

[0025] In this embodiment, a first wind shield 13 is installed at the top of the air cooler 8 at the air outlet, and a second wind shield 14 is installed on the inner wall of one side of the insulation shell 6. The second wind shield 14 is located at the top of the air cooler 8. The first wind shield 13 and the second wind shield 14 form an air duct blowing toward the surface of the lithium belt.

[0026] Specifically, the air duct formed by the first windshield 13 and the second windshield 14 allows the cold air blown by the air cooler 8 to blow onto the surface of the lithium strip unwound by the unwinding roller 2, thereby effectively reducing the surface temperature of the lithium strip.

[0027] In this embodiment, the heat-insulating shell 6 is a corrugated heat-insulating shell, and a plastic plate 15 is installed on the back of the mounting plate 1 .

[0028] Specifically, this method can reduce the temperature dissipation efficiency in the heat-insulating shell 6 .

[0029] Working principle: After the lithium strip is unwound by the unwinding roller 2, it passes through the tensioning roller 3 and the two pressing roller assemblies 4 and then is rolled by the calendering assembly 5. During this process, the air cooler 8 reduces the temperature inside the insulation shell 6 by working, and the exhaust fan 9 cooperates with the air cooler 8 to realize air circulation inside the insulation shell 6. The wind speed sensor 11 is set to detect the blowing speed of the air cooler 8. When the temperature sensor 10 detects that the temperature inside the insulation shell 6 rises, the air cooler 8 can be controlled by the external controller to increase the blowing speed. When the temperature inside the insulation shell 6 drops, the air cooler 8 can be controlled by the external controller to reduce the blowing speed. In this way, the temperature inside the insulation shell 6 can be maintained. When the lithium ribbon is released, when the lithium ribbon passes through the pressure roller assembly 4, the pressure roller assembly 4 will reduce the temperature of the lithium ribbon surface. In this way, the surface temperature of the lithium ribbon can be prevented from increasing when the pressure roller assembly 4 rotates rapidly, affecting the ductility, thereby improving the processing efficiency of the lithium ribbon. When the lithium ribbon passes through the pressure roller assembly 4, the side wind knife 12 can also clean the surface of the lithium ribbon, thereby improving the effect of the lithium ribbon after processing. When the lithium ribbon is rolled and calendered by the calendering assembly 5, since the calendering assembly 5 is composed of cooling rollers, the surface temperature of the lithium ribbon can also be reduced during the rolling and calendering process. The above method can effectively reduce the surface temperature of the lithium ribbon during processing, thereby avoiding the impact of the processing efficiency on the increase of the lithium ribbon temperature.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lithium strip low-temperature finishing rolling mechanism, comprising a mounting plate (1), on the surface of which are mounted, from top to bottom, an unwinding roller (2) for unwinding the lithium strip, a tensioning roller (3), two pressing roller assemblies (4) for reducing the surface temperature of the lithium strip, and a rolling assembly (5) for rolling the lithium strip, characterized in that: An insulation shell (6) is installed on the front of the installation plate (1), and the unwinding roller (2), the tensioning roller (3) and the pressure roller assembly (4) are all located inside the insulation shell (6). An insulation door (7) is hinged on the front of the insulation shell (6). An air cooler (8) is installed on one side of the insulation shell (6), and an exhaust fan (9) is installed on the other side of the insulation shell (6). A temperature sensor (10) and a wind speed sensor (11) are respectively installed on both sides of the insulation shell (6), and the detection probe of the wind speed sensor (11) is located directly above the air outlet of the air cooler (8). Two wind knives (12) are also installed on the surface of the installation plate (1), and the two wind knives (12) are respectively located at the bottom of the sides of two corresponding pressure roller assemblies (4).

2. A lithium strip low temperature finishing rolling mechanism according to claim 1, characterized in that: The pressure roller assembly (4) includes a mounting seat (41) mounted on the surface of the mounting plate (1), bearings (42) are mounted on both sides of the mounting seat (41), a roller core (43) is mounted between the two bearings (42), a spiral groove (44) is provided on the surface of the roller core (43), a circulation cavity is provided inside the roller core (43), an opening penetrating the circulation cavity is provided at one end of the roller core (43), a connecting pipe (45) is inserted into the circulation cavity, one end of the connecting pipe (45) is connected to a rotary joint (46), the rotary joint (46) blocks the opening, an inlet pipe (47) and a return pipe (48) are provided on the surface of the rotary joint (46), an inlet (49) and an outlet (410) penetrating the circulation cavity are provided at both ends of the spiral groove (44), and a pressure roller body (411) is sleeved on the outside of the roller core (43).

3. A lithium strip low temperature finishing rolling mechanism according to claim 2, characterized in that: Sealing grooves (412) are provided on both end surfaces of the roller core (43), and O-shaped sealing rings (413) are installed in the sealing grooves (412).

4. A lithium strip low temperature finishing rolling mechanism according to claim 1, characterized in that: The calendering assembly (5) is composed of two cooling rollers installed on the front of the mounting plate (1), the two cooling rollers are arranged correspondingly, and the cooling rollers are located at the bottom end of the insulation shell (6).

5. The lithium strip low temperature finishing rolling mechanism according to claim 1, characterized in that: A first windshield (13) is installed at the air outlet on the top of the air cooler (8), and a second windshield (14) is installed on the inner wall of one side of the heat-insulating shell (6). The second windshield (14) is located at the top of the air cooler (8), and the first windshield (13) and the second windshield (14) form an air duct blowing toward the surface of the lithium strip.

6. A lithium strip low temperature finishing rolling mechanism according to claim 1, characterized in that: The heat-insulating shell (6) is a corrugated heat-insulating shell, and a plastic plate (15) is installed on the back of the mounting plate (1).

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