Device system and method for automatically coating and slitting lithium ion battery diaphragm

Abstract

The invention discloses an automatic coating and slitting device system and method for a lithium ion battery diaphragm, and relates to the technical field of lithium ion battery diaphragm production. The preheating unit is used for preliminarily preheating the unwound lithium ion battery diaphragm roll material to increase the temperature of the material; the coating unit is used for coating the lithium ion battery diaphragm with a coating material; the drying unit is used for drying the coated lithium ion battery diaphragm and removing a solvent or moisture in a coating material; the storage unit is used for storing the dried lithium ion battery diaphragm; the slitting unit is used for slitting the lithium ion battery diaphragm according to the product size; the standing unit is used for standing the cut lithium ion battery diaphragm finished product; according to the whole coating and slitting process, the production efficiency is improved, manual intervention is reduced through automation, the cost is reduced, and the product quality is improved by accurately controlling all links.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium-ion battery diaphragm production, and in particular to a device system and method for automated coating and slitting of lithium-ion battery diaphragms. Background Art

[0002] With the widespread application of lithium-ion batteries in the field of new energy, higher requirements are placed on the quality and production efficiency of lithium-ion battery separators. In the production process of lithium-ion battery separators, coating and slitting are two key processes. However, the existing manual or semi-automatic coating and slitting processes may be inefficient and difficult to ensure product consistency and quality; traditional methods may have problems such as complex operation, high cost, and slow production speed; the precision control during coating and slitting may not be accurate enough, affecting the performance of the final product. Summary of the invention

[0003] The purpose of the present invention is to provide a device system and method for automated coating and slitting of lithium-ion battery separators, thereby realizing automated continuous production of lithium-ion battery separator coating and slitting, improving production efficiency and product quality, and solving the technical problems of low automation, poor precision and low efficiency in existing production technologies.

[0004] The purpose of the present invention can be achieved through the following technical solutions:

[0005] A device system for automatic coating and slitting of lithium-ion battery separators, comprising an unwinding unit, a preheating unit, a coating unit, a drying unit, a storage unit, a slitting unit and a standing unit;

[0006] The unwinding unit unwinds the lithium-ion battery diaphragm roll uniformly;

[0007] The preheating unit is used to preheat the unwound lithium-ion battery separator coil to increase the temperature of the material;

[0008] The coating unit coats the coating material on the lithium-ion battery separator;

[0009] The drying unit is used to dry the coated lithium-ion battery separator to remove the solvent or moisture in the coating material;

[0010] The storage unit is used to store the dried lithium-ion battery separator;

[0011] The cutting unit is used to cut the lithium-ion battery separator according to product size;

[0012] The static unit is used to statically place the cut lithium-ion battery separator finished product.

[0013] As a further solution of the present invention: the specific working method of the unwinding unit is: first, the lithium-ion battery diaphragm roll to be processed is installed on the unwinding unit, and the tension, roll diameter detection and frequency control of the roll are performed by operating the control system on the operation interface, and the corresponding button is clicked, and the motor drives the mechanical shaft to drive the unwinding roller to rotate, so as to realize the uniform unwinding of the lithium-ion battery diaphragm roll.

[0014] As a further scheme of the present invention: the specific working method of the coating unit is: the preheated lithium-ion battery separator passes through the coating unit at a uniform speed, the feeding system in the coating unit supplies coating material to the coating head, the coating head contains anilox roller, back roller, ink cartridge and scraper mechanism, the anilox roller uses a concave hole carrier to carry liquid, and has the functions of storing ink, transferring ink and distributing ink, the back roller plays the role of supporting and assisting the transfer of coating liquid during the coating process, and is used in conjunction with the anilox roller; the coordination of the back roller, anilox roller and scraper controls the thickness of the coating liquid.

[0015] As a further solution of the present invention: the specific method of the drying unit is: after coating is completed, the lithium-ion battery separator enters the drying unit; the drying unit uses electric heating as a heat source, and is equipped with five ovens, each oven is connected to each other, and is equipped with multiple rollers to drive the coil and a hot air circulation system to allow heat to flow, and is equipped with a display screen and a control system, which can control the temperature and conveyor belt speed, etc., to remove solvents or moisture in the coating material.

[0016] As a further scheme of the present invention: the specific method of the slitting unit is: the wide-width lithium-ion battery separator coil is first released from the unwinding device, guided to the slitting position by the guide roller, and the wide-width lithium-ion battery separator coil is slit using a rotating blade or a slitting knife holder. The slit lithium-ion battery separator coil is collected on the winding device to form a narrow-width coil.

[0017] As a further solution of the present invention: the slitting machine is equipped with a counter and a marking device for recording the number of slitting and marking the material, and the marking on the material is used for subsequent identification and use.

[0018] As a further solution of the present invention: a method for automated coating and slitting of lithium-ion battery separators, the specific steps of the method are:

[0019] Step 1: Install the lithium-ion battery diaphragm roll to be processed onto the unwinding unit, and evenly unwind the lithium-ion battery diaphragm roll through the unwinding unit;

[0020] Step 2: The lithium-ion battery diaphragm coil enters the preheating unit for preheating, and the preheated lithium-ion battery diaphragm coil is sent to the coating unit for coating;

[0021] Step 3: Place the coated lithium-ion battery separator film roll into a drying unit, and dry the lithium-ion battery separator film roll through the drying unit;

[0022] Step 4: The dried lithium-ion battery separator rolls are classified and stored in a storage unit;

[0023] Step 5: The lithium-ion battery diaphragm roll enters the slitting unit from the storage unit, and the lithium-ion battery diaphragm roll is slit by the slitting unit;

[0024] Step 6: Place the finished lithium-ion battery separator product that has been cut in a static unit.

[0025] Beneficial effects of the present invention:

[0026] (1) The entire coating and slitting process of the present invention not only improves production efficiency, reduces manual intervention and reduces costs through automation, but also improves product quality through precise control of each link. In addition, the addition of a preheating unit helps to improve the leveling and adhesion of the coating material, thereby improving the performance of the final product.

[0027] (2) The system of the present invention can flexibly adjust parameters according to different production requirements to adapt to changing production needs; the addition of a drying unit may improve the efficiency of the production process and reduce material waste; the overall structural design may optimize the production process and reduce material loss during the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a structural schematic diagram of the device system of the present invention.

[0030] 1. Unwinding unit; 2. Preheating unit; 3. Coating unit; 4. Drying unit; 5. Storage unit; 6. Slitting unit; 7. Standing unit. DETAILED DESCRIPTION

[0031] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0032] See also Figure 1As shown, the first embodiment of the present invention provides a device system for automatic coating and slitting of lithium-ion battery separators, comprising an unwinding unit 1, a preheating unit 2, a coating unit 3, a drying unit 4, a storage unit 5, a slitting unit 6 and a standing unit 7;

[0033] The unwinding unit 1 evenly unwinds the lithium-ion battery separator roll;

[0034] The preheating unit 2 is used to preheat the unwound lithium-ion battery separator coil to increase the temperature of the material;

[0035] The coating unit 3 coats the coating material on the lithium-ion battery separator;

[0036] The drying unit 4 is used to dry the coated lithium-ion battery separator to remove the solvent or moisture in the coating material;

[0037] The storage unit 5 is used to store the dried lithium-ion battery separator;

[0038] The cutting unit 6 is used to cut the lithium-ion battery separator according to the product size;

[0039] The static unit 7 is used to statically place the cut lithium-ion battery separator finished product.

[0040] The specific working method of the unwinding unit 1 is: first, the lithium-ion battery diaphragm roll to be processed is installed on the unwinding unit 1, and the tension, roll diameter detection and frequency conversion speed regulation of the roll are performed by operating the control system on the operation interface. Click the corresponding button, and the motor drives the mechanical shaft to drive the unwinding roller to rotate, so as to realize the uniform unwinding of the lithium-ion battery diaphragm roll.

[0041] The specific working method of the coating unit 3 is as follows: the preheated lithium-ion battery diaphragm passes through the coating unit 3 at a uniform speed, and the feeding system in the coating unit 3 supplies the coating material to the coating head. The coating head contains an anilox roller, a back roller, an ink cartridge and a scraper mechanism. The anilox roller uses a concave hole carrier to carry liquid and has the functions of storing ink, transferring ink and distributing ink. The back roller plays a role of supporting and assisting in transferring the coating liquid during the coating process and is used in conjunction with the anilox roller; the coordination of the back roller, the anilox roller and the scraper controls the thickness of the coating liquid.

[0042] The specific method of the drying unit 4 is as follows: after coating is completed, the lithium-ion battery separator enters the drying unit 4; the drying unit 4 uses electric heating as a heat source, and is provided with five ovens, each oven is interconnected, and is equipped with a plurality of rollers to drive the coil and a hot air circulation system to allow heat to flow, and is equipped with a display screen and a control system, which can control the temperature and conveyor belt speed, etc., to remove the solvent or moisture in the coating material.

[0043] The specific method of the slitting unit 6 is as follows: the wide-width lithium-ion battery diaphragm coil is first released from the unwinding device, guided to the slitting position by the guide roller, and the wide-width lithium-ion battery diaphragm coil is slit using a rotating blade or a slitting knife holder. The slit lithium-ion battery diaphragm coil is collected on the winding device to form a narrow-width coil.

[0044] Specifically, the membrane enters the slitting unit 6 from the storage unit 5. The operation of the slitting machine usually includes the following key steps: Unwinding: The wide coil is first released from the unwinding device, which usually involves tension control to ensure that the material is released flat and without damage; Guiding: The material is guided to the slitting position through a series of guide rollers. The function of the guide rollers is to keep the material running straight and prevent the material from running off; Slitting: The slitting part is the core of the slitting machine, which is usually achieved using a rotating blade or a slitting knife holder. The blade can be fixed or adjustable to meet the slitting requirements of different widths. Tension control: During the slitting process, the tension of the material needs to be precisely controlled to ensure the accuracy of slitting and the flatness of the material; Correction system: Some slitting machines are equipped with an automatic correction system to ensure that the material remains in the correct position during the slitting process; Slitting speed: The slitting speed needs to match the unwinding speed and rewinding speed to maintain the continuity and efficiency of the production line; Slitting accuracy: The slitting accuracy of the slitting machine directly affects the quality of the final product, so the design and adjustment of the slitting machine need to ensure high-precision slitting; Rewinding: The slit material is collected on the rewinding device to form a narrow roll. Rewinding also needs to control the tension and speed to ensure the neatness and uniformity of the roll; Counting and marking: The slitting machine may be equipped with a counter and marking device to record the number of slits and mark the material for subsequent identification and use; Control system: Modern slitting machines are usually equipped with a PLC control system or a touch screen operation interface, allowing operators to set slitting parameters, monitor equipment status and perform fault diagnosis; Safety protection: The slitting machine is designed with operational safety in mind and is equipped with emergency stop buttons, protective covers and other safety protection measures.

[0045] The second aspect of the present invention provides a method for automated coating and slitting of lithium-ion battery separators, the specific steps of the method are:

[0046] Step 1: Install the lithium-ion battery diaphragm roll to be processed onto the unwinding unit 1, and evenly unwind the lithium-ion battery diaphragm roll through the unwinding unit 1;

[0047] Step 2: The lithium-ion battery diaphragm coil enters the preheating unit 2 for preheating, and the preheated lithium-ion battery diaphragm coil is sent to the coating unit 3 for coating;

[0048] Step 3: Place the coated lithium-ion battery separator coil into the drying unit 4, and dry the lithium-ion battery separator coil through the drying unit 4;

[0049] Step 4: The dried lithium-ion battery separator rolls are classified and stored in the storage unit 5;

[0050] Step 5: The lithium-ion battery separator roll enters the slitting unit 6 from the storage unit 5, and the lithium-ion battery separator roll is slid by the slitting unit 6;

[0051] Step 6: Place the finished lithium-ion battery separator product that has been cut in the static unit 7 for static placement.

[0052] Working principle of the present invention: The unwinding unit 1 is used to place the lithium-ion battery diaphragm coil to be coated and cut, and to achieve stable unwinding. The preheating unit 2 has the function of preheating the incoming material in advance. The coating unit 3 includes a coating head and a feeding system, which can achieve uniform and precise coating. The drying unit 4 is used to quickly dry the coated diaphragm to ensure the quality of the coating. The storage unit 5 is used to store the intermediate products. When problems are encountered in the cutting, they can be solved in the storage unit 5 so that the next link can be carried out smoothly. The cutting unit 6 adopts high-precision tools and control systems to achieve precise cutting. The static unit 7 puts the finished diaphragm after cutting aside. This process not only improves production efficiency, reduces manual intervention and reduces costs through automation, but also improves product quality by precisely controlling each link. In addition, the addition of the preheating unit 2 helps to improve the leveling and adhesion of the coating material, thereby improving the performance of the final product.

[0053] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A device system for automatic coating and cutting of lithium-ion battery separators, characterized in that: It includes an unwinding unit, a preheating unit, a coating unit, a drying unit, a storage unit, a slitting unit and a static unit; The unwinding unit unwinds the lithium-ion battery diaphragm roll uniformly; The preheating unit is used to preheat the unwound lithium-ion battery separator coil to increase the temperature of the material; The coating unit coats the coating material on the lithium-ion battery separator; The drying unit is used to dry the coated lithium-ion battery separator to remove the solvent or moisture in the coating material; The storage unit is used to store the dried lithium-ion battery separator; The cutting unit is used to cut the lithium-ion battery separator according to product size; The static unit is used to statically place the cut lithium-ion battery separator finished product.

2. The device system for automatic coating and slitting of lithium-ion battery separators according to claim 1, characterized in that: The specific working method of the unwinding unit is: first, the lithium-ion battery diaphragm roll to be processed is installed on the unwinding unit, and the tension, roll diameter detection and frequency conversion speed regulation of the roll are performed by operating the control system on the operation interface. Click the corresponding button, and the motor drives the mechanical shaft to drive the unwinding roller to rotate, so as to realize the uniform unwinding of the lithium-ion battery diaphragm roll.

3. The device system for automatic coating and slitting of lithium-ion battery separators according to claim 1, characterized in that: The specific working method of the coating unit is as follows: the preheated lithium-ion battery diaphragm passes through the coating unit at a uniform speed, and the feeding system in the coating unit supplies coating material to the coating head. The coating head contains an anilox roller, a back roller, an ink cartridge and a scraper mechanism. The anilox roller uses a concave hole carrier to carry liquid and has the functions of storing ink, transferring ink and distributing ink. The back roller plays a role of supporting and assisting in transferring the coating liquid during the coating process and is used in conjunction with the anilox roller; the coordination of the back roller, the anilox roller and the scraper controls the thickness of the coating liquid.

4. The device system for automatic coating and slitting of lithium-ion battery separators according to claim 1, characterized in that: The specific method of the drying unit is as follows: after coating is completed, the lithium-ion battery separator enters the drying unit; the drying unit uses electric heating as a heat source, and is provided with five ovens, each oven is interconnected, and is equipped with multiple rollers to drive the coil and a hot air circulation system to allow heat to flow, and is equipped with a display screen and a control system, which can perform temperature control, conveyor belt speed control, etc., to remove solvents or moisture in the coating material.

5. The device system for automatic coating and slitting of lithium-ion battery separators according to claim 1, characterized in that: The specific method of the slitting unit is as follows: the wide-width lithium-ion battery separator coil is first released from the unwinding device, guided to the slitting position by the guide roller, and the wide-width lithium-ion battery separator coil is slit using a rotating blade or a slitting knife holder. The slit lithium-ion battery separator coil is collected on the winding device to form a narrow-width coil.

6. The device system for automatic coating and slitting of lithium-ion battery separators according to claim 1, characterized in that: The slitting machine is equipped with a counter and a marking device for recording the number of slittings and marking the material. The marking on the material is used for subsequent identification and use.

7. A method for automated coating and slitting of lithium-ion battery separators, characterized in that: The specific steps of the method are: Step 1: Install the lithium-ion battery diaphragm roll to be processed onto the unwinding unit, and evenly unwind the lithium-ion battery diaphragm roll through the unwinding unit; Step 2: The lithium-ion battery diaphragm coil enters the preheating unit for preheating, and the preheated lithium-ion battery diaphragm coil is sent to the coating unit for coating; Step 3: Place the coated lithium-ion battery separator film roll into a drying unit, and dry the lithium-ion battery separator film roll through the drying unit; Step 4: The dried lithium-ion battery separator rolls are classified and stored in a storage unit; Step 5: The lithium-ion battery separator roll enters the slitting unit from the storage unit, and the lithium-ion battery separator roll is slid by the slitting unit; Step 6: Place the finished lithium-ion battery separator product that has been cut in a static unit.

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