Device for cleaning surface of coating back roller of lithium ion battery

Abstract

The utility model relates to a device for cleaning the surface of a coating back roller of a lithium ion battery, which comprises the coating back roller and a cleaning device, the cleaning device is arranged above the coating back roller through a support, an ultrasonic generating area is arranged in the middle of the cleaning device, negative pressure dust absorbing areas are arranged on two sides of the cleaning device, and dust collecting areas are arranged at two ends of the cleaning device. And a baffle plate is arranged between the ultrasonic generation area and the negative pressure dust collection area. The surface of the coating back roller can be automatically cleaned, manpower consumption is reduced, and the risk that the hands of personnel are wound into the clamping roller can be avoided. The cleaning device separates dust and foreign matter from the surface of the coating back roller in an ultrasonic mode, and then the dust and the foreign matter are sucked into a dust collection box to be removed in a negative pressure mode. The whole device has the function of preventing the surface of the coating back roller from being scratched in the working process, so that the service life of the back roller is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium-ion battery production, in particular to a device for cleaning the surface of a coating back roller of a lithium-ion battery. Background Art

[0002] During the negative electrode coating process of a lithium-ion battery, graphite, dust, and particulate matter will adhere to the surface of the back roller, and dust and foreign objects are likely to float to the surface of the negative electrode sheet during the drying process on the back side, which will cause the floating dust and foreign objects on the back to adhere to the coating back roller during the front coating; when the electrode sheet passes around the roller surface, it will be pushed out of the convex area by the foreign objects attached to the surface, and there will be periodic defective points during coating, affecting the coating effect, resulting in unqualified electrode sheet quality, and even causing the electrode sheet to be scratched, torn, or the tape to break in the severely convex area, affecting the production process.

[0003] At present, the main way to clean the coating back roller still relies on manual cleaning, which is time-consuming and laborious and has the risk of the hand being caught in the pinch roller; in addition, there are also some automatic roller cleaning methods, such as fixing a scraper and a cleaning roller beside the back roller, and the scraper and the cleaning roller are in contact with the surface of the back roller to remove foreign objects on the surface of the back roller. However, these methods of automatically cleaning the surface of the coating back roller need to generate friction by contacting the back roller, which is likely to cause scratches on the surface of the back roller and reduce the service life of the back roller. Therefore, it is particularly important to find an automatic cleaning method that does not damage the surface of the coating back roller. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a device for cleaning the surface of a coating back roller of a lithium-ion battery, aiming to achieve the automatic cleaning function while avoiding damage to the coating back roller, so as to solve the problems encountered in the above background art.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A device for cleaning the surface of a coating back roller of a lithium-ion battery includes a coating back roller and a cleaning device. The cleaning device is installed above the coating back roller through a bracket. The middle part of the cleaning device is provided with an ultrasonic generating area, the two sides of the cleaning device are provided with negative pressure dust suction areas, and the two ends of the cleaning device are provided with dust collection areas. A baffle is arranged between the ultrasonic generating area and the negative pressure dust suction area. As a preferred solution, in order to facilitate the flow of air, the length of the baffle is 1 / 2 to 2 / 3 from the bottom of the cleaning device to the surface of the coating back roller.

[0007] In the above solution, the cleaning device includes a housing, the opening of which is inclined downward, and the ultrasonic generating area, the negative pressure dust suction area, and the dust collection area are all located inside the housing. Among them, a curved surface matching the coating back roller is provided at the joint between the cleaning device and the coating back roller. As a preferred solution, a foam pad is provided on the outer peripheral edge of the curved surface.

[0008] In the above solution, a number of ultrasonic generators are provided in the ultrasonic generation area, and the ultrasonic generators are evenly arranged along the middle inside of the cleaning device; a negative pressure fan is provided in the negative pressure dust suction area; a dust collection box is installed in the dust collection area. Further, positive pressure fans are also installed in the middle of both ends of the cleaning device, there are at least two negative pressure fans, and they are located on both sides of the positive pressure fans.

[0009] In one of the embodiments, a top cover is provided on the top of the dust collection box; fixing grooves are provided at both ends of the cleaning device, and the dust collection box is inserted into the fixing grooves. In addition, the dust collection box includes a box body, an air filter screen and a connecting frame, the bottom surface and the top surface of the box body are fixedly connected by the connecting frame, and the air filter screen is inserted between two adjacent connecting frames.

[0010] When the device is in operation, the cleaning device can be opened and closed manually or connected in a manner linked to the coating back roll, and relevant cleaning functions can be achieved.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: This device can realize automatic cleaning of the surface of the coating back roll, reduce labor consumption, and avoid the risk of personnel's hands being caught in the pinch rolls. The cleaning device uses ultrasonic waves to separate dust and foreign objects from the surface of the coating back roll, and then sucks the dust and debris into the dust collection box by negative pressure for removal. The working process of the whole device can prevent scratching the surface of the coating back roll, thereby improving the service life of the back roll. Description of the Drawings

[0012] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic structural diagram of the cleaning device in the present utility model;

[0015] Figure 3 is a schematic structural diagram of the dust collection box in the present utility model.

[0016] Reference numerals in the figures: 1 - coating die head; 2 - coating substrate; 3 - coating back roll; 4 - cleaning device; 41 - baffle; 5 - dust collection box; 501 - box body; 502 - air filter screen; 503 - connecting frame; 504 - top cover; 6 - ultrasonic generator; 7 - positive pressure fan; 8 - negative pressure fan; 9 - foam pad. Detailed Embodiments

[0017] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the relevant components of the present utility model.

[0018] According to the technical solution of the present utility model, without changing the essential spirit of the present utility model, those of ordinary skill in the art can propose various structural ways and implementation ways that can be mutually replaced. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0019] The technical solution of the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0020] Example 1, as Figure 1 shown, a device for cleaning the surface of a coating back roll of a lithium-ion battery includes a coating back roll 3 and a cleaning device 4. During operation, the coating back roll 3 rotates clockwise, and the coating substrate 2 is drawn upward from below on it, while the coating die head 1 faces the drawn coating substrate 2. The cleaning device 4 is installed above the coating back roll 3 through a bracket, that is, behind the upper part where the coating back roll 3 rotates and draws the coating substrate 2.

[0021] The middle part of the cleaning device 4 is provided with an ultrasonic generating area, the two sides of the cleaning device 4 are provided with negative pressure dust suction areas, and the two ends of the cleaning device 4 are provided with dust collection areas. A baffle 41 is provided between the ultrasonic generating area and the negative pressure dust suction area. The ultrasonic generating area separates the dust and foreign matters on the coating back roll 3 through ultrasonic waves, and then uses the negative pressure dust suction area for negative pressure suction, and then conducts centralized collection in the dust collection area. As a preferred solution, in order to facilitate the flow of air, the length of the baffle 41 is 1 / 2 to 2 / 3 from the bottom of the cleaning device 4 to the surface of the coating back roll 3, and the outflow gap is used for the dust and foreign matters to enter the negative pressure dust suction areas on both sides from the ultrasonic generating area in the air flow.

[0022] The cleaning device 4 includes an ultrasonic generating area in the middle and foreign matter collection areas at both ends. The cleaning device 4 is fixed above the coating back roll 3 by a bracket and can be directly fixed on the coating machine. During the coating process, as the coating back roll 3 rotates, the dust and foreign matters attached to the surface of the coating back roll 3 will pass through the working area of the cleaning device 4, and under the action of the cleaning device 4, the dust and foreign matters are removed.

[0023] This uses non-contact ultrasonic waves to clean the foreign matters adhered to the surface of the coating back roll 3. The cleaning device 4 and the coating back roll 3 are non-contact, which can avoid scratching the surface of the coating back roll 3.

[0024] Embodiment 2. On the basis of Embodiment 1, the cleaning device 4 includes a housing, which is in a box-shaped structure with its opening inclined downward, and the ultrasonic generating area, the negative pressure dust suction area, and the dust collection area are all located inside the housing. Among them, at the joint between the cleaning device 4 and the coating back roller 3, there is an arc surface that cooperates with the coating back roller 3. Looking from Figure 1 above, on the side of the cleaning device close to the coating back roller, and it is concave, parallel to the surface of the coating back roller 3.

[0025] Since the cleaning device 4 is in contact with the coating back roller 3, the contact surface is concave and has the same radian as the surface of the coating back roller 3, making the cleaning area in a closed state, avoiding the escape of dust and foreign objects, and also facilitating the movement of dust and foreign objects to the negative pressure area. As a preferred solution, a foam pad 9 is provided on the outer peripheral edge of the arc surface to prevent the cleaning device 4 from damaging the coating back roller 3 during operation.

[0026] Please refer to Figure 2 , several ultrasonic generators 6 are provided in the ultrasonic generating area. The ultrasonic generators 6 are evenly arranged along the middle inside of the cleaning device 4 and can be installed in a row. A negative pressure fan 8 is provided in the negative pressure dust suction area for exhausting the air flow inside the cleaning device 4. A dust collection box 5 is installed in the dust collection area, and the foreign object collection area has a detachable and replaceable dust collection box, which is convenient for continuous production and cleaning. Further, positive pressure fans 7 are also installed in the middle of both ends of the cleaning device 4. There are at least two negative pressure fans 8 and they are located on both sides of the positive pressure fans 7.

[0027] The positive pressure fans 7 can also be installed in the gaps between the ultrasonic generators 6, with their openings facing the coating back roller 3, so that they have a good effect of conveying air flow. The negative pressure fans 8 can also be installed inside the negative pressure dust suction area, with their openings facing both ends, for conveying air flow to both ends.

[0028] The ultrasonic area is in the middle of the cleaning device. Positive pressure fans 7 are installed at both ends with openings to blow air flow onto the surface of the back roller. Negative pressure fans 8 are installed at both ends of the negative pressure dust suction area with openings to exhaust air outwards. The foreign objects on the surface of the back roller are sucked into the dust collection box 5 by using negative pressure.

[0029] The ultrasonic generating area is in a positive pressure state. The ultrasonic waves emitted by the ultrasonic generators 6 are transmitted to the surface of the coating back roller 3 through the air, destroying the attachment state of foreign objects on the surface of the back roller and separating the foreign objects from the surface of the coating back roller 3. The high-pressure air flow blows towards the surface of the coating back roller 3 to make the desorbed foreign objects float up. There is a negative pressure fan 8 in the foreign object collection area, and the whole area is in a negative pressure state, sucking the floating foreign objects on the roller surface and collecting them in the dust collection box 5.

[0030] The ultrasonic wave is transmitted to the surface of the coating back roller 3 through the air. The ultrasonic wave can break the air viscosity layer on the surface of the back roller, destroy the adhesion state of dust and foreign matter on the surface of the coating back roller. Under the action of the positive pressure fan 7, the airflow makes the desorbed dust and foreign matter float up, and the negative pressure dust suction area sucks the floating dust and foreign matter into the dust collection box 5 for removal. While realizing the automatic cleaning function, it can also avoid damage to the coating back roller.

[0031] Example 3, based on Example 1, please refer to Figure 3 The top of the dust box 5 is provided with a top cover 504, which can be replaced by a wooden block, mainly used for personnel to pinch it when replacing the dust box 5. The inner sides of both ends of the cleaning device 4 are provided with fixing grooves, and the dust box 5 is inserted into the fixing grooves. The negative pressure dust suction area of ​​the cleaning device 4 has holes of the same size as the bottom of the dust box 5 at both ends, and the top cover 504 is bonded to the top of the dust box 5. The top cover 504 is slightly larger than the opening on the cleaning device 4, and an interference fit is achieved. The dust box 5 can be fixed on the cleaning device 4, and the dust box 5 can be pulled out and inserted from the upper part of the cleaning device 4 by using the top cover 504.

[0032] In implementation, the dust box 5 includes a box body 501, an air filter 502 and a connecting frame 503. The bottom surface and the top surface of the box body 501 are fixedly connected by the connecting frame 503 and are detachable from each other. The air filter 502 is plugged into two adjacent connecting frames 503. In implementation, the dust box 5 can also be operated as follows: the dust box 5 is composed of the box body 501 and the air filter 502. The upper and lower surfaces of the box body 501 are closed. The upper and lower surfaces are connected by four mouth-shaped pillars 503. The air filter 502 passes through the four mouth-shaped brackets 503 in sequence to form four surfaces, forming the dust box 5.

[0033] An air filter 502 is installed inside the dust box 5 to filter dust and foreign matter in the air. Therefore, in this device, the dust box 5 can be pulled out and inserted into the cleaning device 4, and the air filter 502 can be disassembled and cleaned, so that this device can be recycled.

[0034] During the process of air entering and exiting the dust box 5, dust and foreign matter mixed in the air will adhere to the air filter 502 of the dust box 5. The dust box 5 can be taken out regularly for cleaning and the air filter 502 can be replaced. To clean the air filter 502, the dust box 5 needs to be pulled out of the cleaning device 4 and the air filter 502 can be pulled out of the mouth-shaped support for cleaning.

[0035] When the device is in operation, the cleaning device 4 can be connected and set to be opened and closed manually or in a manner linked to the coating back roller 3, and relevant cleaning functions can be achieved. Therefore, there are two control methods for opening and closing the cleaning device 4. It can be opened and closed synchronously with the coating back roller 3 in a linked manner, or the opening and closing of the cleaning device can be manually controlled. When linked, the switch circuit is connected to the switch line of the coating machine. When the coating back roller 3 rotates, the components between the various zones in the cleaning device 4 also work together. When manually controlled, only install the switch of this device in a suitable position on the coating machine and turn it on when dust removal is required.

[0036] This device can automatically clean the surface of the coating back roller, reduce labor consumption, and also avoid the risk of personnel's hands being caught in the pinch rollers. The cleaning device 4 uses ultrasonic waves to separate dust and foreign objects from the surface of the coating back roller, and then uses negative pressure to suck the dust and debris into the dust collection box 5 for removal. The working process of the entire device can prevent the surface of the coating back roller from being scratched, thereby extending the service life of the back roller.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. These unpublicized elements all belong to the prior art that can be known to those skilled in the art.

[0038] The specific embodiments described above further elaborate on the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An apparatus for cleaning the surface of a back roller of a lithium-ion battery, characterized in that: It includes a coating back roll (3) and a cleaning device (4). The cleaning device (4) is mounted above the coating back roll (3) through a bracket. An ultrasonic generating area is provided in the middle of the cleaning device (4), negative pressure dust suction areas are provided on both sides of the cleaning device (4), dust collection areas are provided at both ends of the cleaning device (4), and a baffle (41) is provided between the ultrasonic generating area and the negative pressure dust suction area.

2. The device for cleaning the surface of the back roller of a lithium-ion battery coating according to claim 1, characterized in that: The cleaning device (4) includes a housing with an opening inclined downward. The ultrasonic generating area, the negative pressure dust suction area, and the dust collection area are all located inside the housing.

3. The device for cleaning the surface of the back roller of a lithium-ion battery coating according to claim 2, characterized in that: A curved surface matching the coating back roll (3) is provided at the joint between the cleaning device (4) and the coating back roll (3).

4. The device for cleaning the surface of the back roller for lithium-ion battery coating according to claim 3, wherein: A foam pad (9) is provided on the outer peripheral edge of the curved surface.

5. The device for cleaning the surface of the back roller for lithium-ion battery coating according to claim 1, wherein: The length of the baffle (41) is 1 / 2 to 2 / 3 from the bottom of the cleaning device (4) to the surface of the coating back roll (3).

6. The device for cleaning the surface of the back roller for lithium-ion battery coating according to claim 1, characterized in that: A number of ultrasonic generators (6) are provided in the ultrasonic generating area, and the ultrasonic generators (6) are evenly arranged along the middle inside of the cleaning device (4); a negative pressure fan (8) is provided in the negative pressure dust suction area; a dust collection box (5) is installed in the dust collection area.

7. The device for cleaning the surface of the back roller for lithium-ion battery coating according to claim 6, wherein: Positive pressure fans (7) are also installed in the middle of both ends of the cleaning device (4). At least two negative pressure fans (8) are provided and are located on both sides of the positive pressure fans (7).

8. The device for cleaning the surface of the back roll for lithium-ion battery coating according to claim 6, characterized in that: The top of the dust collection box (5) is provided with a top cover (504); fixing grooves are provided at both ends of the cleaning device (4), and the dust collection box (5) is inserted into the fixing grooves.

9. The device for cleaning the surface of the back roller for lithium-ion battery coating according to claim 8, characterized in that: The dust collection box (5) includes a box body (501), an air filter (502), and a connecting frame (503). The bottom surface and the top surface of the box body (501) are fixedly connected through the connecting frame (503), and the air filter (502) is inserted into adjacent two connecting frames (503).

10. The device for cleaning the surface of the back roll of a lithium-ion battery coating according to claim 1, wherein: The opening and closing of the cleaning device (4) are set manually or in a manner linked with the coating back roll (3).

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