Coating device for preparing lithium ion battery diaphragm

Abstract

The utility model discloses a coating device for preparing a lithium ion battery diaphragm. The coating device comprises a working table, and a feeding machine, a coating drying box and a winding machine which are sequentially mounted at the top of the working table from left to right, a battery diaphragm sequentially penetrates through the feeding machine, the coating drying box and the winding machine; the inner side of the coating drying box is provided with a coating assembly for performing double-sided coating on the battery diaphragm and a drying assembly for drying the coated battery diaphragm; anti-deviation guide assemblies are arranged on the two sides of the coating drying box; a battery diaphragm is sequentially arranged on the feeding machine, the coating drying box and the winding machine in a penetrating mode, the servo motor, the rotating rod, the linear guide rail, the movable plate and the guide column are matched, the battery diaphragm can be guided and limited, and the battery diaphragm feeding device can adapt to feeding of battery diaphragms with different widths; and the condition of deviation of the battery diaphragm can be effectively avoided, so that the coating quality of the battery diaphragm can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery diaphragm coating technical field especially relates to a kind of coating devices for lithium ion battery diaphragm preparation. BACKGROUND

[0002] In the structure of lithium battery, diaphragm is one of key inner layer components, and the performance of diaphragm determines the interface structure, internal resistance etc. of battery, directly affects the capacity, cycle and safety performance etc. of battery characteristics, and excellent diaphragm has important role to improve the comprehensive performance of battery, and diaphragm needs to be coated during preparation process.

[0003] The lithium battery diaphragm coating machine is disclosed in the Chinese utility model patent with publication number CN211099857U, first fix the original roll on the original roll column, the scraper is at the lower end before feeding, then pass the coating cavity of the coating box at one end of the original roll, and connect to the winding column, after feeding, the movable chamber is screwed in the bolt, the scraper support is driven to rise, so that the scraper rises, so that the knife surface of the scraper and the surface of the coating rotating wheel form a certain gap, then the winding column is driven to rotate by the motor operation, the original roll is fed forward by the rotation of the coating rotating wheel, the coating standard of the gap length is reached, and the coating liquid is added in the liquid pipe coating box by the action of the coating liquid pump, so that the original roll is wound into the outer wall of the winding column after the coating process in the coating box, and the lithium battery diaphragm roll can be obtained.

[0004] However, the width of the original roll column, the winding column and the coating rotating wheel is often fixed in actual use, when the width of the diaphragm original roll for coating is less than the width thereof, the diaphragm original roll is prone to deviation during conveying, thereby affecting the coating quality of the diaphragm. SUMMARY

[0005] The utility model overcomes the insufficient of prior art, provides a kind of coating device for lithium ion battery diaphragm preparation.

[0006] To achieve the above object, the utility model adopts the technical scheme that a kind of coating device for lithium ion battery diaphragm preparation, it includes: workbench, feeding machine, coating drying box and winding machine are installed in sequence from left to right on the top of the workbench;

[0007] Battery diaphragm is sequentially arranged in the feeding machine, the coating drying box and the winding machine;The inner side of the coating drying box is provided with a coating assembly for double-sided coating of the battery diaphragm, and a drying assembly for drying the coated battery diaphragm;The two sides of the coating drying box are provided with anti-deviation guide assemblies;

[0008] The anti-deviation guiding assembly comprises a plurality of fixed plates fixed on the top of the workbench, a linear guide rail and a rotating rod arranged between the fixed plates, and a servo motor fixed on one side of the fixed plates; the side surface of the rotating rod is provided with a plurality of moving plates, one side of each moving plate is rotatably connected with a plurality of guiding columns, and the battery diaphragm is clamped between adjacent guiding columns.

[0009] In a preferred embodiment of the utility model, the bottom of the linear guide rail is fixed with the top of the workbench, the two ends of the rotating rod are rotatably connected with the inner side of the fixed plate, the output end of the servo motor is fixed with one end of the rotating rod, and the side surface of the rotating rod is provided with threads in opposite directions; the inner side of the moving plate is threadedly connected with the side surface of the rotating rod, and the bottom is slidably connected with the top of the linear guide rail.

[0010] In a preferred embodiment of the utility model, the inner side of the coating drying box is fixed with a partition plate, and the two sides of the coating drying box and the surface of the partition plate are both provided with penetrating grooves.

[0011] In a preferred embodiment of the utility model, the coating assembly comprises a material conveying pipe fixed on the top of the coating drying box, a C-shaped coating pipe fixed on one end of the material conveying pipe inside the coating drying box, and a plurality of coating heads fixed on the side surface of the C-shaped coating pipe; the top of the material conveying pipe is fixed with a coating joint used for connecting an external coating liquid conveying device.

[0012] In a preferred embodiment of the utility model, the bottom of the coating drying box is fixed with a conical liquid return frame, the side surface of the conical liquid return frame is installed with a valve, and the inside of the conical liquid return frame penetrates to the bottom of the C-shaped coating pipe.

[0013] In a preferred embodiment of the utility model, the drying assembly comprises a T-shaped air conveying pipe fixed on the top of the coating drying box, a plurality of C-shaped drying pipes fixed on the bottom of the T-shaped air conveying pipe inside the coating drying box, and a plurality of air outlet heads fixed on the side surface of the C-shaped drying pipes; the top of the T-shaped air conveying pipe is fixed with a hot air joint used for connecting an external hot air conveying device.

[0014] In a preferred embodiment of the utility model, the plurality of C-shaped drying pipes are evenly distributed on the bottom of the T-shaped air conveying pipe in a linear array mode.

[0015] In a preferred embodiment of the utility model, the front surface of the coating drying box is provided with a plurality of opening and closing doors, one side of each opening and closing door is hingedly connected with the front surface of the coating drying box, one side of adjacent opening and closing doors is clamped with each other, and the front surface of each opening and closing door is fixed with a handle.

[0016] In a preferred embodiment of the utility model, the front surface of the opening and closing door is provided with an observation window.

[0017] In a preferred embodiment of the utility model, the bottom of the workbench is fixed with several supporting legs.

[0018] The utility model solves the defects in the background art, and has the following beneficial effects:

[0019] (1) The coating device for lithium ion battery diaphragm preparation is provided, the anti-deviation guiding assembly is arranged on the two sides of the coating drying box, the battery diaphragm is sequentially arranged on the feeder, the coating drying box and the winding machine, the cooperation of the servo motor, the rotating rod, the linear guide rail, the moving plate and the guiding column can guide and limit the battery diaphragm, the battery diaphragm can be fed to adapt to battery diaphragms of different widths, and the deviation of the battery diaphragm can be effectively avoided, thereby helping to improve the coating quality of the battery diaphragm.

[0020] (2) In the utility model, the coating assembly is arranged on the inner side of the coating drying box, the coating connector is connected to the coating liquid conveying equipment through the pipeline, the cooperation of the feeding pipe, the C-shaped coating pipe and the plurality of coating heads can realize the double-sided uniform coating effect on the top and bottom of the battery diaphragm, thereby improving the coating effect and quality of the battery diaphragm.

[0021] (3) In the utility model, the drying assembly is arranged on the inner side of the coating drying box, the hot air connector is connected to the hot air conveying equipment through the pipeline, the cooperation of the T-shaped air conveying pipe, the plurality of C-shaped drying pipes and the plurality of air outlet heads can realize the double-sided uniform drying effect on the top and bottom of the battery diaphragm, thereby realizing timely drying after coating and helping to improve the preparation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further described below in combination with the drawings and examples;

[0023] Figure 1 It is the perspective structural drawing of the preferred embodiment of the utility model;

[0024] Figure 2 It is the structure drawing of the rotating rod and the fixed plate connection of the preferred embodiment of the utility model;

[0025] Figure 3 It is the front view half cut structure drawing of the coating drying box of the preferred embodiment of the utility model;

[0026] Figure 4It is the preferred embodiment of the utility model's coating drying oven side view half cut structure diagram;

[0027] In the drawing: 1, workbench;11, feeder;12, coating drying oven;13, winding machine;2, fixed plate;21, linear guide rail;22, rotating rod;23, servo motor;24, moving plate;25, guide column;3, partition;31, through groove;4, conveying pipe;41, C type coating pipe;42, coating head;43, coating joint;5, conical liquid return frame;51, valve;6, T type air conveying pipe;61, C type drying pipe;62, air outlet head;63, hot air joint;7, opening and closing door;71, handle;8, observation window;9, supporting leg. DETAILED DESCRIPTION

[0028] The utility model will be explained further in detail in combination with the drawings and examples, these drawings are all simplified schematic diagram, only with schematic way the basic structure of the utility model is shown, therefore it only shows the constitution related with the utility model.

[0029] As Figure 1 , Figure 2 and Figure 3 Indicated, a kind of coating device for lithium ion battery separator preparation, comprising: workbench 1, feeder 11, coating drying oven 12 and winding machine 13 are sequentially installed on the top of workbench 1 from left to right;Battery separator is sequentially arranged through feeder 11, coating drying oven 12 and winding machine 13;The inner side of coating drying oven 12 is provided with coating assembly for double-sided coating of battery separator, and drying assembly for drying battery separator after coating;The two sides of coating drying oven 12 are provided with anti-deviation guide assembly;Anti-deviation guide assembly includes: a plurality of fixed plates 2 fixed on the top of workbench 1, linear guide rail 21 and rotating rod 22 arranged between a plurality of fixed plates 2, and servo motor 23 fixed on one side of fixed plate 2;The side of rotating rod 22 is provided with a plurality of moving plates 24, and the side of moving plate 24 is rotatably connected with a plurality of guide columns 25, and battery separator is clamped between adjacent guide columns 25.

[0030] It should be noted that the bottom of linear guide rail 21 is fixed with the top of workbench 1, the two ends of rotating rod 22 are rotatably connected with the inner side of fixed plate 2, the output end of servo motor 23 is fixed with one end of rotating rod 22, and the side of rotating rod 22 is provided with opposite threads;The inner side of moving plate 24 is threadedly connected with the side of rotating rod 22, and the bottom is slidably connected with the top of linear guide rail 21;The number of fixed plate 2, moving plate 24 and guide column 25 is preferably two;Feeder 11 and winding machine 13 are all general standard parts or components known to those skilled in the art, and their structure and principle are known to those skilled in the art through technical manual or through conventional experimental method, which will not be described in detail here.

[0031] Specifically, the battery separator is sequentially arranged on the feeder 11, the coating drying box 12 and the winding machine 13, the servo motor 23 is started, and the rotating rod 22 is driven to rotate. Since the side surface of the rotating rod 22 is provided with threads in opposite directions, the two moving plates 24 can be driven to move close to each other on the rotating rod 22, and the bottom of the moving plate 24 can slide along the top of the linear guide rail 21. Thus, one side of the moving plate 24 can be in contact with the side surface of the battery separator, and the battery separator can be clamped between the two guide columns 25. The feeder 11 and the winding machine 13 are started to drive the battery separator to feed. Under the cooperation of the coating assembly and the drying assembly, the coating and drying operations of the battery separator can be completed. During the feeding process, the moving plate 24 and the guide column 25 play a guiding and limiting role, so that the battery separator of different widths can be fed, and the deviation of the battery separator can be effectively avoided, thereby helping to improve the coating quality of the battery separator.

[0032] As shown in Figure 3 In some embodiments, the inner side of the coating drying box 12 is fixed with a partition plate 3, and the two sides of the coating drying box 12 and the surface of the partition plate 3 are provided with through grooves 31.

[0033] It should be noted that the coating assembly and the drying assembly are respectively located on the two sides of the partition plate 3. Through the arrangement of the partition plate 3, the coating and drying operations can be partitioned to avoid mutual influence. The through grooves 31 are arranged to facilitate the battery separator to be arranged on the inner side of the coating drying box 12.

[0034] As shown in Figure 3 and Figure 4 In some embodiments, the coating assembly comprises a material conveying pipe 4 fixed on the top of the coating drying box 12, a C-shaped coating pipe 41 fixed on one end of the material conveying pipe 4 inside the coating drying box 12, and a plurality of coating heads 42 fixed on the side surface of the C-shaped coating pipe 41; and the top of the material conveying pipe 4 is fixed with a coating connector 43 for connecting an external coating liquid conveying device.

[0035] It should be noted that the discharge ends of the plurality of coating heads 42 are opposite to the side surface of the battery separator, and the plurality of coating heads 42 are uniformly distributed on the side surface of the C-shaped coating pipe 41 in a linear array manner. After the coating connector 43 is connected to the coating liquid conveying device through a pipeline, the coating liquid conveying device conveys the coating liquid to the material conveying pipe 4, and then to the inside of the C-shaped coating pipe 41 and the plurality of coating heads 42. Since the discharge ends of the plurality of coating heads 42 are opposite to the side surface of the battery separator, and the plurality of coating heads 42 are uniformly distributed on the side surface of the C-shaped coating pipe 41 in a linear array manner, the top and bottom of the battery separator can be uniformly coated on both sides, thereby improving the coating effect and quality of the battery separator.

[0036] In some embodiments, the bottom of the coating drying box 12 is fixed with a conical liquid return frame 5, the side of the conical liquid return frame 5 is provided with a valve 51, and the inside of the conical liquid return frame 5 penetrates to the bottom of the C-shaped coating pipe 41; through the setting of the conical liquid return frame 5, the coating liquid not coated on the surface of the battery diaphragm can enter the conical liquid return frame 5 downward, and the valve 51 can be opened to recycle the coating liquid, thereby improving the utilization rate of the coating liquid.

[0037] In some embodiments, the drying assembly comprises: a T-shaped air conveying pipe 6 fixed on the top of the coating drying box 12, a plurality of C-shaped drying pipes 61 fixed on the bottom of the T-shaped air conveying pipe 6 inside the coating drying box 12, and a plurality of air outlet heads 62 fixed on the side of the C-shaped drying pipes 61; the top of the T-shaped air conveying pipe 6 is fixed with a hot air joint 63 for external connection of a hot air conveying device.

[0038] It should be noted that the plurality of C-shaped drying pipes 61 are uniformly distributed in a linear array at the bottom of the T-shaped air conveying pipe 6; the air outlet ends of the plurality of air outlet heads 62 are opposite to the side of the battery diaphragm, and the plurality of air outlet heads 62 are uniformly distributed in a linear array on the side of the C-shaped drying pipes 61; the hot air joint 63 is externally connected to the hot air conveying device through a pipeline, the hot air conveying device conveys hot air to the T-shaped air conveying pipe 6, and the hot air is sequentially conveyed to the inside of the plurality of C-shaped drying pipes 61 and the plurality of air outlet heads 62 through the T-shaped air conveying pipe 6; since the air outlet ends of the plurality of air outlet heads 62 are opposite to the side of the battery diaphragm and the plurality of air outlet heads 62 are uniformly distributed in a linear array on the side of the C-shaped drying pipes 61, the top and bottom of the battery diaphragm can be uniformly dried, thereby achieving the effect of drying the battery diaphragm after coating in time, which helps to improve the preparation efficiency.

[0039] As shown in Figure 1 In some embodiments, the front of the coating drying box 12 is provided with a plurality of opening and closing doors 7, one side of the opening and closing door 7 is hinged to the front of the coating drying box 12, the side of the adjacent opening and closing door 7 is hinged to each other, and the front of the opening and closing door 7 is fixed with a handle 71.

[0040] It should be noted that through the setting of the plurality of opening and closing plates, the handle 71 can be held to rotate around the hinge point of the opening and closing plate and the coating drying box 12, so that the opening and closing plate drives the opening and closing plate to open one side of the coating drying box 12, which is convenient for the staff to put the battery diaphragm inside the coating drying box 12.

[0041] In some embodiments, the front of the opening and closing door 7 is provided with an observation window 8; through the setting of the observation window 8, the user can observe the condition inside the coating drying box 12 from the outside.

[0042] In some embodiments, the bottom of the workbench 1 is fixed with a plurality of supporting legs 9; through the setting of the supporting legs 9, the workbench 1 can be supported.

[0043] The utility model uses, holds handle 71, turns over with the hinged point of the opening and closing board and coating drying box 12 as the center, drives the opening and closing board, opens one side of coating drying box 12, sets in sequence in pay -off 11, coating drying box 12 and winding machine 13 with battery diaphragm, coating connector 43 is connected to coating fluid delivery equipment through pipeline, hot -blast connector 63 is connected to hot -blast delivery equipment through pipeline, start servo motor 23, drive rotating rod 22 to rotate, because the side of rotating rod 22 is provided with the thread of opposite direction, can drive two moving plates 24 on rotating rod 22 mutually close, the bottom of moving plate 24 will limit along the top of linear guide rail 21 sliding, then can make one side of moving plate 24 and the side of battery diaphragm contact, and make battery diaphragm clamping between two guide posts 25, start pay -off 11 and winding machine 13, drive battery diaphragm to pay -off, coating fluid is delivered to material pipe 4 by coating fluid delivery equipment, several coating heads 42 are to the top and bottom of battery diaphragm, complete the effect of even coating on both sides, hot -blast is delivered to T type air pipe 6 by hot -blast delivery equipment, several air outlet heads 62 are to the top and bottom of battery diaphragm, complete the effect of even drying on both sides, and battery diaphragm is coated and dried to winding machine 13, thereby completing the preparation of battery diaphragm coating.

[0044] The above is according to the ideal embodiment of the utility model for the inspiration, through the above-mentioned description, for the person skilled in the art, obviously, the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can realize the utility model in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, from any point of view, the embodiment should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0045] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A coating device for producing a lithium ion battery separator, characterized by, The utility model provides a battery separator coating and drying device, including: Workbench (1), install feeder (11) from left to right in proper order on the top of workbench (1), coating drying box (12) and winding machine (13); Battery separator passes in proper order feeder (11), coating drying box (12) and winding machine (13), the inside of coating drying box (12) is provided with the coating assembly for carrying out double -sided coating to battery separator and the drying assembly for drying battery separator after coating, and the both sides of coating drying box (12) are provided with the anti -deviation guide assembly, The anti -deviation guide assembly includes: a plurality of fixed plates (2) fixed on the top of workbench (1), linear guide rail (21) and rotating rod (22) are arranged between a plurality of fixed plates (2), and servo motor (23) is fixed on one side of fixed plate (2), the side of rotating rod (22) is provided with a plurality of moving plates (24), one side of moving plate (24) is rotatably connected with a plurality of guide columns (25), and battery separator is clamped between adjacent guide columns (25).

2. The coating device for preparing a lithium ion battery separator according to claim 1, characterized in that: The bottom of linear guide rail (21) is fixed with the top of workbench (1), both ends of rotating rod (22) are rotatably connected with the inside of fixed plate (2), the output end of servo motor (23) is fixed with one end of rotating rod (22), and the side of rotating rod (22) is provided with opposite threads, the inside of moving plate (24) is threadedly connected with the side of rotating rod (22), and the bottom is slidably connected with the top of linear guide rail (21).

3. The coating device for preparing a lithium ion battery separator according to claim 1, characterized in that: The inside of coating drying box (12) is fixed with baffle (3), and the surface of both sides of coating drying box (12) and baffle (3) is provided with through groove (31).

4. The coating device for preparing a lithium ion battery separator according to claim 1, characterized in that: The coating assembly includes: material conveying pipe (4) is fixed on the top of coating drying box (12), C type coating pipe (41) is fixed on one end of material conveying pipe (4) inside coating drying box (12), and a plurality of coating heads (42) are fixed on the side of C type coating pipe (41), the top of material conveying pipe (4) is fixed with coating joint (43) for external coating liquid conveying equipment.

5. The coating device for preparing a lithium ion battery separator according to claim 4, characterized in that: The bottom of coating drying box (12) is fixed with conical liquid return frame (5), the side of conical liquid return frame (5) is provided with valve (51), and the inside of conical liquid return frame (5) is through to the bottom of C type coating pipe (41).

6. The coating device for preparing a lithium ion battery separator according to claim 1, characterized in that: The drying assembly includes: T type air conveying pipe (6) is fixed on the top of coating drying box (12), a plurality of C type drying pipes (61) are fixed on the bottom of T type air conveying pipe (6) inside coating drying box (12), and a plurality of air outlet heads (62) are fixed on the side of C type drying pipe (61), and the top of T type air conveying pipe (6) is fixed with hot air joint (63) for external hot air conveying equipment.

7. The coating device for preparing a lithium ion battery separator according to claim 6, characterized in that: A plurality of C type drying pipes (61) are evenly distributed in the bottom of T type air conveying pipe (6) in linear array mode.

8. The coating device for preparing a lithium ion battery separator according to claim 1, characterized in that: The front of the coating drying oven (12) is provided with a plurality of opening and closing doors (7), one side of the opening and closing door (7) is hinged with the front of the coating drying oven (12), the adjacent sides of the opening and closing doors (7) are clamped with each other, and the front of the opening and closing door (7) is fixed with a handle (71).

9. The coating device for preparing a lithium ion battery separator according to claim 8, characterized in that: The front of the opening and closing door (7) is provided with an observation window (8).

10. The coating device for preparing a lithium ion battery separator according to claim 1, characterized in that: The bottom of the workbench (1) is fixed with a plurality of supporting legs (9).

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