Gluing device and coating system

Abstract

The utility model provides a gluing device and a coating system. The gluing device comprises a mounting base body, a coating assembly and a CCD (Charge Coupled Device) assembly, the coating assembly is arranged on the mounting base body and can coat insulation paste on the pole piece base body, the coating position is adjustable in the width direction of the pole piece base body, the CCD assembly comprises a CCD camera and a light source, the CCD camera can collect an image of the insulation paste covering the pole piece base body, and the light source irradiates an image collection area of the CCD camera on the pole piece base body. According to the gluing device disclosed by the utility model, the insulation glue can be independently coated on the pole piece after the coating of the main material area is finished, and compared with an extrusion die head integrated coating mode, the insulation glue layer of the pole piece is not easy to be mutually dissolved with the main material area during coating, so that the finally produced battery has higher production quality.

Description

Technical Field

[0001] This utility model relates to the field of electrode coating technology, and in particular to a coating device. This utility model also relates to a coating system equipped with the aforementioned coating device. Background Technology

[0002] The technology in the new energy field is advancing by leaps and bounds. Among them, lithium-ion batteries are an important category. As the power supply equipment for many electrical devices, their quality is crucial to the quality and safety of these devices.

[0003] In the manufacturing process of lithium batteries, short circuits caused by the contact between the positive and negative electrodes are a common form of product failure. To address this issue, the industry standard practice is to coat the edges of the positive electrode with insulating adhesive. This prevents short circuits that could occur when the positive and negative electrodes come into contact, thus avoiding thermal runaway and improving battery safety.

[0004] However, most of the current methods of applying insulating adhesive in the industry are edge coating with an integrated extrusion die, that is, the main material area of ​​the electrode and the insulating adhesive are both coated by the extrusion die. This method is prone to the edge insulating adhesive and the main material area being mutually soluble, which may lead to edge loss in subsequent rolling processes, inaccurate edge gripping in die-cutting, stacking and other processes, and affect the production quality of the battery. Utility Model Content

[0005] In view of this, the present invention aims to provide a coating device to improve the production quality of batteries.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] An adhesive application apparatus includes a mounting substrate, an application assembly, and a CCD assembly;

[0008] The coating assembly is disposed on the mounting substrate and is capable of coating the electrode substrate with insulating adhesive. The coating position is adjustable along the width direction of the electrode substrate. The CCD assembly includes a CCD camera and a light source. The CCD camera is capable of acquiring images of the electrode substrate covered with insulating adhesive. The light source illuminates the image acquisition area of ​​the CCD camera on the electrode substrate.

[0009] Furthermore, there are two light sources, which illuminate the image acquisition area at an angle to each other.

[0010] Furthermore, the coating assembly includes a nozzle and a drive unit;

[0011] The drive unit can drive the nozzle to move on the mounting base to adjust the position of the nozzle in the width direction of the electrode substrate.

[0012] Furthermore, the drive unit includes a servo motor and a ball screw;

[0013] The nozzle is connected to the nut of the ball screw, and the servo motor drives the screw of the ball screw to rotate to move the nozzle.

[0014] Furthermore, the nozzle is a screw valve.

[0015] Furthermore, a support roller supporting the electrode substrate is rotatably mounted on the mounting base, and the nozzle faces the support roller.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] The coating device described in this invention can separately coat the electrode sheet with insulating adhesive after the main material area is coated. Compared with the coating method that integrates the extrusion die, it makes the insulating adhesive layer of the electrode sheet less likely to dissolve with the main material area during coating, resulting in higher production quality of the final battery. At the same time, the CCD component can acquire images of the electrode sheet after the insulating adhesive is coated, so as to obtain the coating status of the insulating adhesive in real time and adjust the corresponding coating process to ensure accurate coating of the insulating adhesive, which can also improve the production quality of the battery.

[0018] Secondly, setting up two light sources to illuminate the same image acquisition area from two directions improves the lighting conditions in the image acquisition area, resulting in more uniform lighting and no shadows, thus making the images captured by the CCD camera clearer. By moving the nozzle through the drive unit, the nozzle can be moved along the width of the electrode substrate, thereby changing the coating position of the insulating adhesive. A servo motor drives a ball screw; the rotation of the ball screw's screw moves the nut to move the nozzle, providing precise control over the nozzle's movement and accurate coating position. Using a screw valve as the nozzle allows for precise control of the amount of insulating adhesive dispensed, even with high viscosity adhesive or adhesive containing particulate matter. A rotatable support roller on the mounting substrate supports the electrode substrate, ensuring smooth passage of the substrate under the pressure of the nozzle application and guaranteeing the coating quality of the insulating adhesive.

[0019] Another objective of this invention is to provide a coating system, wherein the coating system is provided with the adhesive applicator as described above.

[0020] Furthermore, the coating system includes a coating unit, which includes a coating device, a first drying device, the adhesive application device, and a second drying device arranged sequentially along the feeding direction of the electrode substrate.

[0021] The coating device can coat the main material on one side of the electrode substrate, the first drying device can dry and shape the surface of the main material on the electrode substrate, the adhesive coating device can coat the edge of one side of the electrode substrate with insulating adhesive, and the second drying device can dry the main material and insulating adhesive on the electrode substrate.

[0022] Furthermore, the coating unit includes a discharge traction device disposed after the second drying device.

[0023] Furthermore, the coating unit is vertically stacked in two sets and connected end to end, which can sequentially coat and dry both sides of the electrode substrate.

[0024] Furthermore, the electrode substrate, supported by the coating unit, forms an arch shape along its length, with low ends and a high middle.

[0025] The coating system described in this invention, by incorporating the aforementioned adhesive coating device, allows for the separate coating of insulating adhesive onto the electrode substrate. This prevents the insulating adhesive layer from easily dissolving with the main material area during coating, resulting in better product quality for the final coated electrode. Furthermore, the electrode substrate sequentially passes through the coating device, the first drying device, the adhesive coating device, and the second drying device. The main material area is first coated, then the surface of the main material area is preliminarily dried and shaped by the first drying device. Next, the adhesive coating device applies the insulating adhesive, and finally, the entire substrate is dried in the second drying device. This results in a better coating effect on both the main material area and the insulating adhesive area of ​​the electrode.

[0026] Secondly, each coating unit is equipped with a discharge traction device that provides power for feeding the electrode substrate and controls the tension of the substrate during feeding. This helps maintain the flatness and stability of the electrode substrate, preventing problems such as wrinkles, twisting, or breakage during coating. Stacking two coating units end-to-end ensures that the coating position of the electrode substrate remains at the top, resulting in a more stable coating effect. It also saves space in the coating system and improves vertical space utilization. The coating unit supports the electrode substrate in an arched shape, lower at both ends and higher in the middle. This more evenly increases the tension of the electrode substrate during feeding and reduces deviation. Attached Figure Description

[0027] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0028] Figure 1 This is a schematic diagram of the adhesive application device described in Embodiment 1 of this utility model;

[0029] Figure 2This is a schematic diagram of the adhesive applicator from another perspective in Embodiment 1 of this utility model;

[0030] Figure 3 This is a schematic diagram of the overall structure of the adhesive coating system described in Embodiment 2 of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Glue application device;

[0033] 101. Mounting substrate; 102. Coating assembly; 1021. Drive unit; 10211. Servo motor; 10212. Ball screw; 1022. Nozzle; 103. CCD assembly; 1031. CCD camera; 1032. Light source; 104. Support roller;

[0034] 2. First drying device;

[0035] 3. Coating device;

[0036] 4. Second drying device;

[0037] 5. Unwinding device;

[0038] 6. Unwinding and correction device;

[0039] 7. Discharge correction device;

[0040] 8. Feed correction device;

[0041] 9. Winding device;

[0042] 10. Traction device. Detailed Implementation

[0043] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0044] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0046] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0047] Example 1

[0048] This embodiment relates to an adhesive coating device to improve the production quality of batteries.

[0049] In terms of overall structure, the adhesive coating device in this embodiment includes a mounting substrate, a coating assembly, and a CCD (charge-coupled device) assembly. The coating assembly is disposed on the mounting substrate and is capable of coating the electrode substrate with insulating adhesive. The coating position is adjustable along the width direction of the electrode substrate. The CCD assembly includes a CCD camera and a light source. The CCD camera is capable of acquiring images of the electrode substrate covered with insulating adhesive, and the light source illuminates the image acquisition area of ​​the CCD camera on the electrode substrate.

[0050] As described above, the coating device in this embodiment can separately coat the electrode sheet with insulating adhesive after the main material area is coated. Compared with the coating method that integrates the extrusion die, the insulating adhesive layer of the electrode sheet is less likely to dissolve with the main material area during coating, resulting in higher production quality of the final battery. At the same time, the CCD component can acquire images of the electrode sheet after the insulating adhesive is coated, so as to obtain the coating status of the insulating adhesive in a timely manner and adjust the corresponding coating process to ensure accurate coating of the insulating adhesive, which can also improve the production quality of the battery.

[0051] Based on the above overview, refer to Figure 1 and Figure 2 As shown, specifically, after the electrode substrate is coated in the main material area, it is conveyed by the conveying device through the mounting substrate 101. While passing through the mounting substrate 101, the coating assembly 102 applies insulating adhesive to the electrode substrate, and the CCD assembly 103 monitors the coating quality of the insulating adhesive. Preferably, the insulating adhesive can be a ceramic slurry, which mainly includes ceramic particles and a polymer binder, providing good isolation and protection when applied to the electrode. Furthermore, in this embodiment, both the coating assembly 102 and the CCD assembly 103 are provided in two sets, respectively located on both sides perpendicular to the electrode substrate feeding direction.

[0052] To improve the image acquisition clarity of the CCD camera 1031, two light sources 1032 are provided, which illuminate the image acquisition area at an angle to each other. By illuminating the same image acquisition area from two directions with two light sources 1032, the lighting conditions in the image acquisition area are improved, resulting in more uniform illumination and no shadows on the electrode substrate, thus making the images acquired by the CCD camera 1031 clearer.

[0053] Regarding the specific structure of the coating assembly 102, the coating assembly 102 includes a nozzle 1022 and a drive unit 1021. The drive unit 1021 can drive the nozzle 1022 to move on the mounting substrate 101 to adjust the position of the nozzle 1022 in the width direction of the electrode substrate. By moving the nozzle 1022 through the drive unit 1021, the nozzle 1022 can be moved in the width direction of the electrode substrate, thereby changing the coating position of the insulating adhesive. In conjunction with the image acquisition information of the CCD component 103 after the insulating adhesive is coated, the position of the nozzle 1022 can be adjusted to ensure the coating position of the insulating adhesive.

[0054] Specifically, the drive unit 1021 includes a servo motor 10211 and a ball screw 10212. The nozzle 1022 is connected to the nut of the ball screw 10212, and the servo motor 10211 drives the screw of the ball screw 10212 to rotate, thereby moving the nozzle 1022. The ball screw 10212 uses a ball-and-screw engagement, resulting in low friction and no idle travel during reciprocating movement, thus providing high movement control precision. Compared to ordinary motors, the servo motor 10211 offers higher rotational precision. By using the servo motor 10211 to drive the ball screw 10212, the rotation of the screw of the ball screw 10212 drives the nut to move the nozzle 1022, ensuring precise movement control of the nozzle 1022 and accurate coating position.

[0055] Secondly, to achieve a better insulating adhesive coating effect, the nozzle 1022 is a screw valve. Using a screw valve as the nozzle 1022 allows for precise control of the insulating adhesive dispensing amount, ensuring normal operation even with high viscosity or the presence of particulate matter, and reducing the likelihood of clogging. Especially in this embodiment, the insulating adhesive is a ceramic slurry containing a large number of ceramic particles; the screw valve effectively reduces clogging. The screw valve is connected to the ceramic slurry supply container, with its outlet vertically downwards and perpendicular to the electrode substrate.

[0056] In addition, to further improve the coating quality of the insulating adhesive, a support roller 104 supporting the electrode substrate is rotatably mounted on the mounting base 101, with the nozzle 1022 facing the support roller 104. In this embodiment, the support roller 104 is located directly below the nozzle 1022, and the mounting base 101 passes over the support roller 104. When the nozzle 1022 sprays the insulating adhesive onto the electrode substrate, the support roller 104 can support the back of the electrode substrate, allowing the electrode substrate to pass smoothly when the nozzle 1022 applies the adhesive, thus ensuring the coating quality of the insulating adhesive.

[0057] The coating apparatus 1 in this embodiment can separately coat the electrode sheet with insulating adhesive after the main material area is coated. Compared with the coating method that integrates the extrusion die, this makes the insulating adhesive layer of the electrode sheet less likely to dissolve with the main material area during coating, resulting in higher production quality of the final battery. The CCD component 103 can acquire images of the electrode sheet after the insulating adhesive is coated, and obtain the coating status of the insulating adhesive in real time to adjust the coating position of the coating component 102, ensuring accurate coating of the insulating adhesive and further improving the production quality of the battery.

[0058] Example 2

[0059] This embodiment relates to a coating system, which includes the adhesive coating device of Embodiment 1. By setting the above-mentioned adhesive coating device, insulating adhesive can be coated separately onto the electrode substrate, making the insulating adhesive layer of the electrode less likely to dissolve with the main material area during coating, resulting in better product quality of the finally coated electrode.

[0060] Based on the above overview, refer to Figure 3 As shown, specifically, the coating system includes a coating unit, which comprises a coating device 3, a first drying device 2, an adhesive coating device 1, and a second drying device 4 arranged sequentially along the feeding direction of the electrode substrate. The coating device 3 coats the main material onto one side of the electrode substrate. The first drying device 2 dries and sets the surface of the main material on the electrode substrate. The adhesive coating device 1 coats the edge of one side of the electrode substrate with insulating adhesive. The second drying device 4 dries both the main material and the insulating adhesive on the electrode substrate. The electrode substrate passes sequentially through the coating device 3, the first drying device 2, the adhesive coating device 1, and the second drying device 4. First, the main material area is coated; then, the surface of the main material area is preliminarily dried and set by the first drying device 2; then, the insulating adhesive is applied by the adhesive coating device 1; and finally, the entire substrate is dried by the second drying device 4. This results in a better coating effect on the main material area and the insulating adhesive area of ​​the electrode.

[0061] The first drying device 2 and the second drying device 4 include multiple ovens. Preferably, in this embodiment, the first drying device 2 has four ovens connected in series, which can complete the surface drying and shaping of the main material area. The second drying device 4 has eight ovens connected in series, which can complete the complete drying of the main material area and the insulating adhesive area.

[0062] Specifically, the coating unit includes a discharge traction device 10 located after the second drying unit 4. Each coating unit is equipped with a discharge traction device 10 to provide power for feeding the electrode substrate and control the tension of the electrode substrate during feeding, helping to maintain the flatness and stability of the electrode substrate and preventing problems such as wrinkles, twisting, or breakage during the coating process. Correspondingly, to ensure accurate feeding position of the electrode substrate, a discharge correction device 7 is also provided between the second drying unit 4 and the discharge traction device 10. The discharge correction device 7 is used to correct the position of the electrode substrate and prevent excessive displacement of the electrode substrate during feeding.

[0063] Furthermore, the electrode substrate, supported by the coating unit, forms an arch shape along its length, low at both ends and high in the middle. The coating unit supports the electrode substrate, shaping it into an arch with low ends and a high middle, which can more evenly increase the tension of the electrode substrate during feeding and reduce deviation. The coating unit 3, the first drying unit 2, the adhesive coating unit 1, and the second drying unit 4 can adjust the final feeding arc of the electrode substrate by using frames of different heights.

[0064] Overall, the coating units are vertically stacked in two sets and connected end-to-end, enabling sequential coating and drying of both sides of the electrode substrate. Stacking the two sets of coating units end-to-end ensures the coating position of the electrode substrate remains at the top, resulting in a more stable coating effect. It also saves space in the coating system and improves vertical space utilization. The coating unit in front of the electrode substrate in the feeding direction is the front unit, and the other is the rear unit. The front unit is equipped with an unwinding device 5 and an unwinding correction device 6. The unwinding device 5 unwinds the electrode substrate, and the unwinding correction device 6 corrects its orientation to ensure accurate entry into the coating unit 3. A feeding correction device 8 is also located between the two coating units to ensure the electrode substrate is correctly positioned when entering the rear unit's coating unit 3. The electrode substrate entering the rear unit's coating unit 3 is then flipped and fed into the subsequent first drying unit 2. The rear end of the rear unit is equipped with a winding device 9, which winds up the electrode substrate that has been coated and dried on both sides.

[0065] In practice, the screw valve of the coating device 1 controls the coating position through a matching servo motor and ball screw. The PLC (Programmable Logic Controller) is integrated into the HMI (Human Machine Interface) of the two coating devices 3. After the CCD component acquires the image of the electrode, the acquired data is sent to the two coating devices 3. The position control of the screw valve can be achieved by jogging control on the HMI of the two coating devices 3 through the data acquired by the CCD component.

[0066] The coating system of this embodiment can first coat the main material area of ​​the electrode substrate, and then use the first drying device 2 to slightly dry and shape the surface of the main material area before coating with insulating adhesive. Finally, the second drying device 4 performs final drying and shaping of both the main material area and the insulating adhesive. This significantly improves the problem of miscibility between the insulating adhesive and the main material area, thus enhancing the quality of the electrode produced by the coating system. Furthermore, the coating system of this embodiment is not limited to applications in the manufacturing processes of lithium-ion power batteries and energy storage batteries; it is also applicable to electrode coating processes for graphene and sodium-ion batteries.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A glue-applying device, characterized in that, include: Mounting substrate, coating components, and CCD components; The coating assembly is disposed on the mounting substrate and is capable of coating the electrode substrate with insulating adhesive. The coating position is adjustable along the width direction of the electrode substrate. The CCD assembly includes a CCD camera and a light source. The CCD camera is capable of acquiring images of the electrode substrate covered with insulating adhesive. The light source illuminates the image acquisition area of ​​the CCD camera on the electrode substrate.

2. The adhesive applicator according to claim 1, characterized in that: The image acquisition area is provided with two light sources, which illuminate each other at an angle.

3. The adhesive applicator according to claim 1, characterized in that: The coating assembly includes a nozzle and a drive unit; The drive unit can drive the nozzle to move on the mounting base to adjust the position of the nozzle in the width direction of the electrode substrate.

4. The adhesive applicator according to claim 3, characterized in that: The drive unit includes a servo motor and a ball screw; The nozzle is connected to the nut of the ball screw, and the servo motor drives the screw of the ball screw to rotate to move the nozzle.

5. The adhesive applicator according to claim 3 or 4, characterized in that: The nozzle is a screw valve, and / or; The mounting base is provided with a support roller that supports the electrode substrate, and the nozzle faces the support roller.

6. A coating system, characterized in that: The coating system is equipped with an adhesive applicator as described in any one of claims 1 to 5.

7. The coating system according to claim 6, characterized in that: The coating system includes a coating unit, which includes a coating device, a first drying device, the adhesive application device, and a second drying device arranged sequentially along the feeding direction of the electrode substrate. The coating device can coat the main material on one side of the electrode substrate, the first drying device can dry and shape the surface of the main material on the electrode substrate, the adhesive coating device can coat the edge of one side of the electrode substrate with insulating adhesive, and the second drying device can dry the main material and insulating adhesive on the electrode substrate.

8. The coating system according to claim 7, characterized in that: The coating unit includes a discharge traction device installed after the second drying device.

9. The coating system according to claim 7, characterized in that: The coating unit is arranged in two vertical stacks connected end to end, which can sequentially coat and dry both sides of the electrode substrate.

10. The coating system according to claim 7, characterized in that: The electrode substrate is supported by the coating unit, and forms an arch shape along its length, which is low at both ends and high in the middle.

Images