Spraying device and conveying system for diaphragm

Abstract

The utility model discloses a diaphragm spraying device and a conveying system, the spraying device comprises a diaphragm inlet and a diaphragm outlet, and the spraying device further comprises a first guide roller, a second guide roller, a third guide roller and a fourth guide roller, the second guide roller is used for leading the diaphragm out to a diaphragm outlet, and the first guide roller and the second guide roller are located on the same horizontal plane; the bottom roller is used for guiding the diaphragm from the first guide roller to the second guide roller, the bottom roller is located below the first guide roller and the second guide roller, and a space for containing a first spraying machine is formed between the first guide roller and the bottom roller or between the bottom roller and the second guide roller. The spraying device is low in use cost.

Description

Technical Field

[0001] This utility model belongs to the field of diaphragm production technology, specifically relating to a diaphragm spraying device and conveying system. Background Technology

[0002] The separator is one of the three main materials in lithium-ion batteries, directly related to battery cycle life, safety, and current density. With the rapid development of modern industry, separator materials have been widely used in many fields such as electronics, packaging, and optics. The requirements for separator surface treatment are also increasing. Traditional offline coating and spraying have gradually revealed many shortcomings, such as increased production processes and operating costs. To address these shortcomings, online spraying has been developed. However, current online spraying still suffers from high operating costs. For example, during the spraying process, the separator continuously rises from the inlet to the outlet, requiring significant electrical energy. Utility Model Content

[0003] In view of this, the present invention provides a diaphragm spraying device and conveying system with low operating cost.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A diaphragm spraying apparatus includes a diaphragm inlet and a diaphragm outlet, the spraying apparatus further comprising:

[0006] A first guide roller is used to introduce the diaphragm into the diaphragm inlet;

[0007] The second guide roller is used to lead the diaphragm to the diaphragm outlet, and the first guide roller and the second guide roller are located on the same horizontal plane;

[0008] A bottom roller for guiding the diaphragm from the first guide roller onto the second guide roller, the bottom roller being located below the first guide roller and the second guide roller, and a space for accommodating the first spraying machine being provided between the first guide roller and the bottom roller or between the bottom roller and the second guide roller.

[0009] In a preferred embodiment, a plurality of adjusting rollers are provided between the bottom roller and the first guide roller. The adjusting rollers include a first adjusting roller and a second adjusting roller, wherein the first adjusting roller is located below the first guide roller and the second adjusting roller is located below the first adjusting roller.

[0010] In a preferred embodiment, the bottom roller is positioned directly below the second guide roller so that the diaphragm passes vertically between the bottom roller and the second guide roller.

[0011] In a preferred embodiment, the first sprayer is located between the bottom roller and the second guide roller, and the nozzle of the first sprayer is directed toward the diaphragm.

[0012] In a preferred embodiment, the distance between the bottom roller and the second guide roller is 80-120cm.

[0013] Specifically, the distance between the bottom roller and the second guide roller is 100cm.

[0014] In a more preferred embodiment, the surfaces of the first guide roller, the second guide roller, the bottom roller, and the adjusting roller are coated with a ceramic coating. By providing the ceramic coating, the coefficient of friction between the guide roller, the bottom roller, and the adjusting roller and the diaphragm is reduced, thereby minimizing static electricity generation.

[0015] In a preferred embodiment, the spraying apparatus further includes an auxiliary roller located between the second guide roller and the diaphragm outlet.

[0016] In a preferred embodiment, the spraying apparatus further includes a second sprayer located between the auxiliary roller and the second guide roller, with the nozzle of the second sprayer facing the diaphragm.

[0017] This utility model also adopts the following technical solution:

[0018] A diaphragm conveying system includes a secondary horizontal stretching device and a tertiary horizontal stretching device. The conveying system also includes a spraying device disposed between the secondary horizontal stretching device and the tertiary horizontal stretching device. The outlet of the secondary horizontal stretching device is connected to the diaphragm inlet, and the inlet of the tertiary horizontal stretching device is connected to the diaphragm outlet.

[0019] In a preferred embodiment, the temperature inside the secondary horizontal pulling device is 110-140℃, and the air volume is 20-50m³ / h. 3 / min; the temperature inside the three-stage transverse pulling device is 110-130℃, and the air volume is 15-40m³ / min. 3 / min.

[0020] The present invention adopts the above solution and has the following advantages compared with the prior art:

[0021] In the spraying device of this utility model, when the diaphragm is being sprayed, the diaphragm first passes through the first guide roller and then through the bottom roller, and then through the bottom roller and the second guide roller. When the diaphragm moves from the first guide roller to the bottom roller, it can move downward by its own gravity, which can reduce energy consumption and thus reduce production costs. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a diaphragm conveying system according to an embodiment of the present invention.

[0024] in,

[0025] 100. Diaphragm;

[0026] 1. Secondary cross-tensioning device; 11. Outlet; 2. Tertiary cross-tensioning device; 21. Inlet

[0027] 3. Spraying device; 31. First guide roller; 32. Second guide roller; 33. Bottom roller; 34. Adjusting roller; 341. First adjusting roller; 342. Second adjusting roller; 35. First spraying machine; 351. Nozzle; 36. Auxiliary roller. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted that the description of these embodiments is for the purpose of aiding understanding the present invention, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Reference Figure 1 As shown, this embodiment provides a diaphragm conveying system, including a secondary horizontal stretching device 1, a tertiary horizontal stretching device 2, and a spraying device 3 located between the secondary horizontal stretching device 1 and the tertiary horizontal stretching device 2. The spraying device includes a diaphragm inlet and a diaphragm outlet. The secondary horizontal stretching device 1 has an outlet 11 communicating with the diaphragm inlet, and the tertiary horizontal stretching device 2 has an inlet 21 communicating with the diaphragm outlet. The diaphragm inlet and the diaphragm outlet are located on the same horizontal plane. The diaphragm 100 enters the spraying device 3 from the outlet 11 of the secondary horizontal stretching device 1, and then passes through the spraying device 3 and enters the tertiary horizontal stretching device 2 through the inlet 21. The secondary horizontal stretching device 1 and the tertiary horizontal stretching device 2 mainly clamp and dry the diaphragm 100 while simultaneously performing lateral stretching and lateral retraction.

[0030] Furthermore, the temperature inside the secondary horizontal pulling device 1 is 110-140℃, and the air volume is 20-50m³ / h. 3 / min; the temperature inside the three-stage horizontal pulling device 2 is 110-130℃, and the air volume is 15-40m³ / min.3 / min, the secondary horizontal stretching device 1 and the tertiary horizontal stretching device 2 are composed of multiple independent hot air circulating ovens. The working temperature in the secondary horizontal stretching device 1 gradually decreases between 110-140℃, and the temperature in the tertiary horizontal stretching device 2 gradually decreases between 110-130℃. In the early stage, the diaphragm has a high moisture content and the drying temperature is high, while in the later stage, the temperature gradually decreases.

[0031] In existing technologies, the general steps for spraying slurry onto diaphragms are: secondary transverse stretching—tertiary transverse stretching—winding—first diaphragm slitting—unwinding—spraying—oven drying—winding—second diaphragm slitting. After the tertiary transverse stretching, the diaphragm needs to be wound up and slitted. The first diaphragm slitting is to make the diaphragm suitable for the spraying equipment. The slitted diaphragm needs to be transported to another equipment room, placed on rollers, and sprayed with slurry. After spraying, it is dried, wound up, and slitted a second time. This second slitting depends on the actual application. The overall operation is complex and wastes considerable manpower and resources. This embodiment uses the following steps for diaphragm spraying: secondary transverse stretching—spraying—tertiary transverse stretching—slitting, significantly reducing the number of steps and greatly lowering operating costs. The spraying device is located between the secondary and tertiary transverse stretching devices, enabling online spraying. It eliminates the need to transport the diaphragm after stretching, making it more convenient to use. The secondary cross-stretching device employs a servo motor-driven stretching roller, enabling precise control of the diaphragm's stretching ratio during the secondary cross-stretching process. The stretching ratio can be precisely adjusted within the range of 1.0-2.5, and the stretching speed can be flexibly set according to the linear velocity. The surface of the stretching roller undergoes special treatment, exhibiting low friction and high wear resistance, effectively reducing surface damage to the diaphragm during the stretching process. Simultaneously, it is equipped with an advanced tension sensor and tension feedback control system to monitor diaphragm tension changes in real time. The stretching speed ratio measurement accuracy reaches ±0.1N, ensuring uniform and stable diaphragm tension during the secondary cross-stretching process and preventing diaphragm deformation or rupture due to uneven tension.

[0032] The spraying device 3 in this embodiment includes a first guide roller 31, a second guide roller 32, a bottom roller 33, an adjusting roller 34, and an auxiliary roller 36. Multiple adjusting rollers 34 are included. The surfaces of the first guide roller 31, second guide roller 32, bottom roller 33, adjusting roller 34, and auxiliary roller 36 are coated with a ceramic coating to reduce the coefficient of friction with the diaphragm 100 and minimize static electricity. The conveying system also includes a high-precision photoelectric sensor to detect the edge position of the diaphragm. When the diaphragm deviates, a servo motor drives the rollers in the spraying device 3 for real-time correction. The correction accuracy can reach ±0.5mm, ensuring that the diaphragm maintains a straight line during transport and accurately enters the spraying area.

[0033] Furthermore, the first guide roller 31 is used to introduce the diaphragm 100 into the diaphragm inlet, and the second guide roller 32 is used to lead the diaphragm 100 out to the diaphragm outlet. The first guide roller 31 and the second guide roller 32 are located on the same horizontal plane. The bottom roller 33 is used to guide the diaphragm from the first guide roller 31 onto the second guide roller 32, and the bottom roller 33 is located below the first guide roller 31 and the second guide roller 32. A space for accommodating the first spraying machine 35 is provided between the first guide roller 31 and the bottom roller 33 or between the bottom roller 33 and the second guide roller 32. More specifically, the first spraying machine 35 is provided between the bottom roller 33 and the second guide roller 32, and the first spraying machine 35 is used to directly spray slurry onto the diaphragm between the bottom roller 33 and the second guide roller 32.

[0034] Multiple adjusting rollers 34 are located between the bottom roller 33 and the first guide roller 31. The adjusting rollers 34 include a first adjusting roller 341 and a second adjusting roller 342. The first adjusting roller 341 is located below the first guide roller 31, and the second adjusting roller 342 is located below the first adjusting roller 341. That is, the diaphragm 100 descends gradually from the first guide roller 31, passing through the first adjusting roller 341 and the second adjusting roller 342 before reaching the bottom roller 33. The diaphragm 100 is driven by a motor during both its ascent and descent. However, the power consumption is lower during the descent because the diaphragm 100 can descend by its own gravity, saving on operating costs. In the prior art, the diaphragm does not have a descent stage but is always in the ascent process, resulting in higher power consumption and operating costs.

[0035] The bottom roller 33 is positioned directly below the second guide roller 32 so that the diaphragm 100 passes vertically between the bottom roller 33 and the second guide roller 32. The distance between the bottom roller 33 and the second guide roller 32 is 80-120 cm, more specifically, the distance between the bottom roller 33 and the second guide roller 32 is 100 cm. This distance refers to the distance between the central axis of the bottom roller 33 and the central axis of the second guide roller 32. The nozzle 351 of the first spraying machine 35 sprays the diaphragm 100, covering a large area, and the sprayed slurry can flow down the diaphragm 100 for reuse.

[0036] The auxiliary roller 36 is located between the second guide roller 32 and the diaphragm outlet 102. There is also space between the auxiliary roller 36 and the second guide roller 32 for accommodating a second spraying machine, the nozzle of which faces the diaphragm 100. The setup of the second spraying machine can be determined according to factory requirements. If only single-sided spraying of the diaphragm is required, only the first spraying machine is needed. If double-sided spraying of the diaphragm is required, in addition to setting the first spraying machine 35 between the bottom roller 33 and the second guide roller 32, a second spraying machine is also needed between the auxiliary roller 36 and the second guide roller 32 to spray the other side of the diaphragm. The first spraying machine 35 and the second spraying machine are equipped with piezoelectric high-precision nozzles, with atomized particle diameters in the range of 10-100μm and a spray flow rate of 6.7ml / m³. 2 about.

[0037] The first and second spraying machines employ a multi-axis high-speed mixing process. The shape and layout of the mixing blades are optimized to ensure thorough and uniform mixing of various raw materials in a short time. Mixing speed and time can be precisely set on the fully automatic control panel. During mixing, a temperature control system monitors the slurry temperature in real time. This system stabilizes the slurry temperature between 15 and 45°C, ensuring effective mixing and slurry stability.

[0038] The conveying system also includes an intelligent control system connected to the secondary cross-tensioning device 1, the tertiary cross-tensioning device 2, the spraying device 3, and the first spraying machine 35. This system collects and analyzes the operating data of each device, precisely controls the coordinated operation of each device according to preset process parameters, and features a human-machine interface for operators to set equipment parameters, monitor equipment status, and perform fault alarms and diagnostics. Furthermore, the intelligent control system dynamically adjusts the coating process parameters based on the microstructural changes of the diaphragm after the secondary cross-tensioning, ensuring a good bond between the coating and the diaphragm; it also adjusts the slurry preparation in a timely manner based on the slurry consumption during coating, ensuring the continuity and stability of the production process. Simultaneously, it provides unified management of equipment start-up, shutdown, and emergency braking operations to ensure safe equipment operation. The human-machine interface module is equipped with an intuitive and convenient visual touchscreen interface, allowing operators to easily set equipment parameters, monitor equipment status, and perform fault alarms and diagnostics. The interface displays comprehensive information, including real-time process parameters, equipment operating status, data statistical analysis results, and detailed fault information, enabling operators to understand the equipment's operating status promptly and accurately and make corresponding operational adjustments. In addition, this module supports remote monitoring and operation functions. Operators can remotely log in to the equipment control system via the Internet or local area network to remotely monitor, debug, and maintain the equipment, greatly improving the ease of operation and maintainability. The spraying machine, according to the instructions of the intelligent control system, evenly coats the diaphragm surface with the self-developed spraying slurry. The slurry flow rate and coating thickness can be set on the fully automatic panel, and the pneumatic atomizing nozzle ensures the atomization effect and uniform spreading of the slurry. During the coating process, the slurry supply and return subsystem monitors the slurry usage in real time. Excess slurry is promptly recycled and reused through the return device. Throughout the production process, the intelligent control system collects and analyzes the working parameters and data of each system in real time. If abnormal diaphragm tension or changes in coating thickness are detected, a fault alarm is immediately displayed, allowing operators to make adjustments and optimizations to ensure the stability of the production process and the consistency of product quality. After the production task is completed, the equipment automatically enters the cleaning program. The coating head and slurry supply pipeline of the online coating system are cleaned, as are the mixing unit and dust-free feeding station of the advanced batching equipment, preparing for the next production run.

[0039] In this embodiment, the spraying device is located between the secondary horizontal stretching device 1 and the tertiary horizontal stretching device 2. After the secondary horizontal stretching 1, the diaphragm 100 can be directly sprayed with slurry. After spraying, it enters the tertiary horizontal stretching device 2 for drying and stretching, and finally is directly cut. The operation steps are extremely simple, saving a lot of working time and labor costs. Furthermore, in the spraying device, the height of the first guide roller 31 and the second guide roller 21 is equal. During spraying, the diaphragm 100 starts from the first guide roller 31, passes through the first adjusting roller 341 and the second adjusting roller 342 in sequence until it reaches the bottom roller 33. During this process, the diaphragm 100 can gradually descend not only by the drive of the motor, but also by its own gravity, resulting in low power consumption and low operating costs. In addition, in this embodiment, the first spraying machine 35 located between the bottom roller 33 and the second guide roller 32 directly sprays the vertically positioned diaphragm 100, which saves slurry.

[0040] As indicated in this specification and claims, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements. The term "and / or" as used herein includes any combination of one or more of the associated listed items.

[0041] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0042] The above embodiments are only for illustrating the technical concept and features of this utility model, and are preferred embodiments. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly, and should not be construed as limiting the protection scope of this utility model. All equivalent transformations or modifications made based on the principles of this utility model should be covered within the protection scope of this utility model.

Claims

1. A diaphragm spraying apparatus, comprising a diaphragm inlet and a diaphragm outlet, characterized in that, The spraying device also includes: A first guide roller is used to introduce the diaphragm into the diaphragm inlet; The second guide roller is used to lead the diaphragm to the diaphragm outlet, and the first guide roller and the second guide roller are located on the same horizontal plane; A bottom roller for guiding the diaphragm from the first guide roller onto the second guide roller, the bottom roller being located below the first guide roller and the second guide roller, and a space for accommodating the first spraying machine being provided between the first guide roller and the bottom roller or between the bottom roller and the second guide roller.

2. The spraying apparatus according to claim 1, characterized in that, A plurality of adjusting rollers are provided between the bottom roller and the first guide roller. The adjusting rollers include a first adjusting roller and a second adjusting roller. The first adjusting roller is located below the first guide roller, and the second adjusting roller is located below the first adjusting roller.

3. The spraying apparatus according to claim 2, characterized in that, The bottom roller is positioned directly below the second guide roller so that the diaphragm passes vertically between the bottom roller and the second guide roller.

4. The spraying apparatus according to claim 3, characterized in that, The first sprayer is located between the bottom roller and the second guide roller, and the nozzle of the first sprayer is directed toward the diaphragm.

5. The spraying apparatus according to claim 4, characterized in that, The distance between the bottom roller and the second guide roller is 80-120cm.

6. The spraying apparatus according to claim 2, characterized in that, The surfaces of the first guide roller, the second guide roller, the bottom roller, and the adjusting roller are covered with a ceramic coating.

7. The spraying apparatus according to claim 1, characterized in that, The spraying device also includes an auxiliary roller, which is located between the second guide roller and the diaphragm outlet.

8. The spraying apparatus according to claim 7, characterized in that, The spraying device further includes a second sprayer located between the auxiliary roller and the second guide roller, with the nozzle of the second sprayer facing the diaphragm.

9. A diaphragm conveying system, comprising a secondary transverse tensioning device and a tertiary transverse tensioning device, characterized in that, The conveying system further includes a spraying device as described in any one of claims 1 to 8, the spraying device being disposed between the secondary horizontal pulling device and the tertiary horizontal pulling device, the outlet of the secondary horizontal pulling device being connected to the diaphragm inlet, and the inlet of the tertiary horizontal pulling device being connected to the diaphragm outlet.

10. The conveying system according to claim 9, characterized in that, The temperature inside the secondary horizontal pulling device is 110-140℃, and the air volume is 20-50m³ / h. 3 / min; the temperature inside the three-stage transverse pulling device is 110-130℃, and the air volume is 15-40m³ / min. 3 / min.

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