A lithium battery pole piece section dust removal mechanism

Abstract

The utility model relates to lithium battery pole piece manufacturing technical field and disclose a kind of lithium battery pole piece section dust removal mechanism, including dust suction pipe, the dust suction pipe end is connected with dust removal head, and it is equipped with telescopic drive component for driving dust suction pipe and dust removal head synchronous telescoping on dust suction pipe;Dust removal head is equipped with positive pressure interface, negative pressure interface and be used for the cutout of pole piece passing, the cutout is provided with the negative pressure suction port and the positive pressure air outlet of interval alternate distribution, the positive pressure air outlet with the positive pressure interface intercommunication, the negative pressure suction port with the negative pressure interface intercommunication, and the negative pressure interface with the dust suction pipe intercommunication.Under the cooperation of negative pressure and positive pressure, the adhering matter directly acting on pole piece section makes surface residual compound be gasified or decomposed into dust suction, while not damaging pole piece surface, can effectively prevent the dust of cutting from causing pollution to production environment, and small in size, good cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode manufacturing technology, specifically to a dust removal mechanism for the cut surface of lithium battery electrodes. Background Technology

[0002] During the manufacturing process of battery electrodes, the electrodes are coated, compacted, and then slit. Slitting leaves coating dust and metal dust residue on the cut surfaces of the electrodes. If this dust residue is not thoroughly cleaned, it will affect the quality and performance of the subsequent lithium batteries and cause dust pollution. To ensure the electrochemical performance and cleanliness of the battery, the cut surfaces of the electrodes must be effectively cleaned before subsequent processes.

[0003] Currently, the common method for cleaning electrode sheets after slitting is to use brush dust removal and negative pressure suction to clean the electrode surface. However, some of the side cut surfaces may still be missed. Incomplete cleaning of the electrode sheets not only affects production efficiency but also pollutes the workshop environment. It can also cause bulging during winding, affecting the performance of the battery. To address this, we have proposed a dust removal mechanism for the cut surfaces of lithium battery electrode sheets. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dust removal mechanism for the cut surface of lithium battery electrode sheets. The electrode sheets that have undergone the slitting process pass through the cut of the dust removal head, and the positive and negative pressure airflows in the cut alternately act on the cut surface of the electrode sheets, thereby removing the dust remaining on the side of the electrode sheets.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A dust removal mechanism for lithium battery electrode sections includes a suction pipe with a dust removal head connected to its end. A telescopic drive assembly is installed on the suction pipe to drive the suction pipe and the dust removal head to extend and retract synchronously along the axial direction. The dust removal head has a positive pressure interface, a negative pressure interface, and a slit for the electrode to pass through. The slit contains alternately distributed negative pressure suction ports and positive pressure blowing ports. The positive pressure blowing ports are connected to the positive pressure interface, the negative pressure suction ports are connected to the negative pressure interface, and the negative pressure interface is connected to the suction pipe.

[0007] Optionally, the dust removal head has an independent positive pressure air path and a negative pressure air path inside. The two ends of the negative pressure air path are connected to the negative pressure interface and the negative pressure suction port, respectively, and the two ends of the positive pressure air path are connected to the positive pressure interface and the positive pressure blowing port, respectively.

[0008] Optionally, the cuts are disposed opposite to the negative pressure interface at both ends of the dust removal head, and the positive pressure interface is opened on the side of the dust removal head.

[0009] Optionally, the dust removal head is provided with a digital display interface that communicates with the negative pressure interface. A negative pressure monitoring digital display is installed at the digital display interface, and a positive pressure air connector is installed at the positive pressure interface.

[0010] Optionally, three negative pressure suction ports are provided, and two positive pressure blowing ports are provided, with the positive pressure blowing ports located between two adjacent negative pressure suction ports.

[0011] Optionally, the telescopic drive assembly includes a guide sleeve and a telescopic component mounted on the wall panel, the vacuum cleaner tube slides through the guide sleeve, the output end of the telescopic component is connected to a drive connecting block, and the drive connecting block is fixedly connected to the vacuum cleaner tube.

[0012] Optionally, the suction pipe and the dust removal head are connected by a detachable connecting block, and the cut is away from the suction pipe.

[0013] Optionally, the suction pipe is connected to the dust removal head via a connecting block assembly, and the cut faces the suction pipe.

[0014] Optionally, the connecting block assembly includes a first connecting block and a second connecting block that are perpendicularly connected to each other, the suction pipe is connected to the first connecting block, the dust removal head is installed on the second connecting block, and the suction pipe is connected to the negative pressure interface through a suction hose.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] (1) In this utility model, the attachments on the electrode cutting surface are directly acted on under the combination of negative pressure and positive pressure, so that the residual compounds on the surface are vaporized or decomposed into dust and absorbed, without damaging the electrode surface. This effectively prevents the cutting dust from polluting the production environment, and the size is small and the cleaning effect is good.

[0017] (2) In this utility model, the reciprocating motion of the dust removal head is realized by the telescopic drive component as an adjustment device. It has a simple structure, low cost, and is easy to thread, and can clean up missed areas.

[0018] (3) In this utility model, by using positive and negative pressure air paths, the environmental protection problem and short service life problem of the existing mechanism are solved, and the working efficiency of electrode manufacturing is improved;

[0019] (4) In this utility model, two sets of dust removal mechanisms can be used. One set has a cut away from the suction pipe, and the other set has a cut facing the suction pipe. They act on the front and back cut surfaces of the electrode respectively. When both sets of mechanisms are used at the same time, the cut surfaces of the electrode can be cleaned comprehensively. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the lithium battery electrode section dust removal mechanism (front section) in an embodiment of this utility model;

[0021] Figure 2 This is an isometric structural schematic diagram of the dust removal mechanism (front section) of the lithium battery electrode section in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the lithium battery electrode cutting surface dust removal mechanism (reverse cutting surface) in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure in an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the dust removal head in an embodiment of this utility model;

[0025] Among them, 1. suction pipe; 2. dust removal head; 201. cut; 202. negative pressure suction port; 203. positive pressure blowing port; 204. positive pressure interface; 205. negative pressure interface; 206. digital display interface;

[0026] 301. Guide sleeve; 302. Drive connecting block; 303. Telescopic component;

[0027] 401. First connecting block; 402. Second connecting block; 403. Connecting pipe; 404. Sleeve; 405. Vacuum suction hose;

[0028] 5. Separable connecting block; 6. Positive pressure air connector; 7. Negative pressure monitoring digital display; 8. Negative pressure air circuit; 9. Positive pressure air circuit. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0030] Example 1, as Figures 1-5 As shown, a dust removal mechanism for lithium battery electrode cutting surfaces includes a suction pipe 1, a dust removal head 2, and a telescopic drive assembly. One end of the suction pipe 1 is connected to the dust removal head 2, and the other end is connected to an external device (such as a vacuum pump) for generating negative pressure. The telescopic drive assembly is installed on the suction pipe 1 and is used to drive the suction pipe 1 and the dust removal head 2 to extend and retract synchronously along the axial direction, so that the dust removal head 2 can quickly move to the electrode cleaning position. At the same time, when the cutting equipment stops, the telescopic drive assembly can drive the dust removal mechanism back to its original position to facilitate electrode threading.

[0031] The telescopic drive assembly includes a guide sleeve 301, a drive connecting block 302, and a telescopic component 303. The telescopic component 303 can be an existing module capable of outputting linear motion, such as a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder; a pneumatic cylinder is preferred here. Both the pneumatic cylinder and the guide sleeve 301 are provided with connection holes for fixing to the wall panel. The main bodies of both are fixedly connected to the wall panel, which provides support.

[0032] The drive connecting block 302 is an adjustable connecting block, and its mounting hole can be adjusted according to the pipe diameter by bolts. The suction pipe 1 passes through the mounting hole and is fixedly connected to the drive connecting block 302. The drive connecting block 302 is fixedly connected to the output end of the telescopic component 303, and the suction pipe 1 slides through the guide sleeve 301. Based on this, when the cylinder's telescopic rod (output end) extends or retracts, based on the support of the wall panel and the guide sleeve 301, the suction pipe 1 can synchronously drive the dust removal head 2 to achieve axial position extension and retraction adjustment, so that it can move to the electrode cleaning position or be withdrawn from the cleaning position and reset.

[0033] The cylinder does not perform limit adjustment; it is only responsible for the fixed position extension and retraction of the mechanism.

[0034] The dust removal head 2 has a positive pressure interface 204, a negative pressure interface 205, and a cut 201 for the electrode to pass through. The cut 201 and the negative pressure interface 205 are arranged opposite each other at both ends of the dust removal head 2, while the positive pressure interface 204 is opened on the side of the dust removal head 2 and is located between the negative pressure interface 205 and the cut 201. The cut 201 has a negative pressure suction port 202 and a positive pressure blowing port 203, which are alternately distributed on the inner side of the cut 201. The dust removal head 2 has independent positive pressure air passages 9 and negative pressure air passages 8. The positive pressure blowing port 203 is connected to the positive pressure interface 204 through the positive pressure air passage 9, and the negative pressure suction port 202 is connected to the negative pressure interface 205 through the negative pressure air passage 8. The negative pressure interface 205 is connected to the suction pipe 1.

[0035] As described above, the two ends of the negative pressure air path 8 are connected to the negative pressure interface 205 and the negative pressure suction port 202, respectively. The two ends of the positive pressure air path 9 are connected to the positive pressure interface 204 and the positive pressure blowing port 203, respectively. A positive pressure air connector 6 is installed at the positive pressure interface 204, and the positive pressure air connector 6 is connected to an external device for generating positive pressure. The negative pressure suction generated by the negative pressure device acts on the electrode inside the cut 201 along the suction pipe 1, the negative pressure air path 8, and the negative pressure suction port 202, sucking away the dust at its cut surface. The positive pressure blowing force generated by the positive pressure device acts on the electrode inside the cut 201 along the positive pressure air connector 6 and the positive pressure blowing port 203, causing it to vibrate and shake off the attached material.

[0036] Specifically, when the dust removal head 2 extends to the electrode cleaning position, the first negative pressure suction port 202 first uses the negative pressure chamber to suck up some of the residual adhering substances, and then the positive pressure blowing port 203 uses the airflow of the positive pressure chamber to blow the electrode to make it vibrate and shake off the adhering substances, thus achieving the initial cleaning.

[0037] Since dust may still remain when the conveyor belt speed is too fast, the dust collector head 2 is designed with a 3+2 air path plan, namely 3 negative pressure air paths 8 and 2 positive pressure air paths 9, which are respectively connected to three negative pressure suction ports 202 and two positive pressure blowing ports 203. The positive pressure blowing ports 203 are located between two adjacent negative pressure suction ports 202. The positive pressure blowing ports 203 are smaller than the negative pressure suction ports 202 and do not share air paths to ensure the cleaning effect of suction and blowing.

[0038] After the initial cleaning, the same position of the electrode is cleaned again by the next working position of the dust removal head 2, thus cleaning the cross-section of the electrode in a comprehensive manner. That is, the same position undergoes suction, blowing, suction, blowing and suction in sequence, and the dust removal mechanism automatically avoids the electrode when the equipment stops.

[0039] Furthermore, a digital display interface 206, connected to the negative pressure interface 205, is provided on the outer side of the dust collector head 2. A negative pressure monitoring digital display 7 is installed at the digital display interface 206. The dust collector head 2 is made of 304 stainless steel with a smooth surface to prevent magnetic deposits from forming on the surface of the dust collector head 2. The negative pressure air path 8 and positive pressure air path 9 are regularly distributed in the cut 201 of the dust collector head 2. The positive pressure interface 204 is the airflow inlet of the positive pressure air path 9, the negative pressure interface 205 is connected to the negative pressure air path 8, and the negative pressure monitoring digital display interface 206 is connected to the negative pressure monitoring digital display 7 to monitor the negative pressure value.

[0040] Furthermore, the dust removal mechanism proposed in this utility model can be used in two sets. The cut 201 of one set is away from the suction pipe 1, and the cut 201 of the other set is towards the suction pipe 1, which respectively act on the front and back cut surfaces of the electrode. The two sets of mechanisms are used at the same time, which can thoroughly clean the cut surfaces of the electrode.

[0041] Example 2, as Figure 3 As shown, based on Embodiment 1, the suction pipe 1 and the dust removal head 2 are connected by a separate connecting block 5, and the cut 201 is away from the suction pipe 1 to ensure that the mechanism acts on the tangential surface of the electrode sheet.

[0042] The end of the suction pipe 1 furthest from the drive connecting block 302 is sealed to the left end of the separate connecting block 5, and the right end of the separate connecting block 5 is sealed to the dust removal head 2, ensuring stable flow of negative pressure airflow. When the output end of the cylinder extends, the dust removal head 2 moves to the electrode cleaning position; when the output end of the cylinder retracts, the dust removal head 2 resets to facilitate electrode threading.

[0043] Example 3, as Figure 1 and Figure 2 As shown, based on Embodiment 1, the suction pipe 1 and the dust removal head 2 are connected by a connecting block assembly, and the cutout 201 faces the suction pipe 1. This ensures that the mechanism acts on the reverse side of the electrode sheet; when the output end of the cylinder retracts, the dust removal head 2 moves to the electrode sheet cleaning position, and when the output end of the cylinder extends, the dust removal head 2 resets to facilitate electrode sheet threading.

[0044] The connecting block assembly includes a first connecting block 401 and a second connecting block 402 that are perpendicularly connected to each other. The suction pipe 1 is connected to the first connecting block 401, the dust removal head 2 is installed on the second connecting block 402, and the suction pipe 1 and the negative pressure interface 205 are connected through the suction hose 405.

[0045] Specifically, the first connecting block 401 and the second connecting block 402 are fixedly connected by a connecting pipe 403. The connecting pipe 403 serves as a connector, and both ends of the connecting pipe 403 can pass through the locking holes of the two connecting blocks to achieve locking and fixation. Similarly, a sleeve 404 is provided at one end of the first connecting block 401 opposite to the connecting pipe 403. The sleeve 404 passes through the other locking hole of the first connecting block 401 to achieve locking and fixation. The vacuum pipe 1 and the vacuum hose 405 are respectively embedded at both ends of the sleeve 404 to achieve communication and ensure unobstructed airflow.

[0046] The retraction of the cylinder moves the dust removal head 2 of this mechanism to the reverse side of the electrode sheet, and the electrode sheet is cleaned by the negative pressure airflow of the suction pipe 1 and the positive pressure air connector 6. Because the reverse side is opposite to the forward side, the cylinder of the reverse side dust removal mechanism moves in the opposite direction to the cylinder of the aforementioned forward side dust removal mechanism.

[0047] Working principle:

[0048] The arrangement of the dust removal mechanisms on the front and back cut surfaces depends on the position of the electrode sheets and the available equipment space. When the equipment starts, the telescopic drive assembly moves the dust removal head 2 of the dust removal mechanism to the electrode sheet cleaning position. The cut electrode sheets pass through the cuts 201 of the dust removal heads 2 of the two dust removal mechanisms. The negative pressure airflow of the suction pipe 1 is drawn through the negative pressure suction port 202 of the negative pressure chamber of the dust removal head 2, sucking the attached material into the suction pipe 1. The positive pressure airflow of the positive pressure air connector 6 blows air onto the electrode sheets through the positive pressure blowing port 203 of the positive pressure chamber of the dust removal head 2, causing the electrode sheets to vibrate and shake off the attached material. The attached material is then sucked up by the negative pressure suction port 202 of the negative pressure chamber. This effectively removes a large amount of adhering material, improves the quality and performance of the lithium battery, and ensures the electrochemical performance and safety of the battery. When the equipment stops, the telescopic drive assembly moves the dust removal mechanism back to its original position for easy threading.

[0049] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0051] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A dust removal mechanism for the cut surface of a lithium battery electrode, characterized in that: The device includes a suction pipe, the end of which is connected to a dust removal head. A telescopic drive assembly is installed on the suction pipe to drive the suction pipe and the dust removal head to extend and retract synchronously along the axial direction. The dust removal head has a positive pressure interface, a negative pressure interface, and a slit for the electrode to pass through. The slit has alternately distributed negative pressure suction ports and positive pressure blowing ports. The positive pressure blowing ports are connected to the positive pressure interface, the negative pressure suction ports are connected to the negative pressure interface, and the negative pressure interface is connected to the suction pipe.

2. The lithium battery electrode cutting surface dust removal mechanism according to claim 1, characterized in that: The dust removal head has an internal positive pressure air passage and a negative pressure air passage. The two ends of the negative pressure air passage are connected to the negative pressure interface and the negative pressure suction port, respectively. The two ends of the positive pressure air passage are connected to the positive pressure interface and the positive pressure blowing port, respectively.

3. The lithium battery electrode cutting surface dust removal mechanism according to claim 2, characterized in that: The cuts are positioned opposite to the negative pressure interface at both ends of the dust removal head, and the positive pressure interface is located on the side of the dust removal head.

4. The lithium battery electrode cutting surface dust removal mechanism according to claim 3, characterized in that: The dust removal head has a digital display interface on its outer side that communicates with the negative pressure interface. A negative pressure monitoring digital display is installed at the digital display interface, and a positive pressure air connector is installed at the positive pressure interface.

5. The lithium battery electrode cutting surface dust removal mechanism according to claim 1, characterized in that: There are three negative pressure suction ports and two positive pressure blowing ports, with the positive pressure blowing ports located between two adjacent negative pressure suction ports.

6. The lithium battery electrode cutting surface dust removal mechanism according to claim 1, characterized in that: The telescopic drive assembly includes a guide sleeve and a telescopic component mounted on the wall panel. The vacuum cleaner tube slides through the guide sleeve. The output end of the telescopic component is connected to a drive connecting block, and the drive connecting block is fixedly connected to the vacuum cleaner tube.

7. The lithium battery electrode cutting surface dust removal mechanism according to any one of claims 1-6, characterized in that: The suction pipe and the dust removal head are connected by a detachable connecting block, and the cut is away from the suction pipe.

8. The lithium battery electrode cutting surface dust removal mechanism according to any one of claims 1-6, characterized in that: The suction pipe is connected to the dust removal head via a connecting block assembly, and the cut faces the suction pipe.

9. The lithium battery electrode cutting surface dust removal mechanism according to claim 8, characterized in that: The connecting block assembly includes a first connecting block and a second connecting block that are perpendicularly connected to each other. The suction pipe is connected to the first connecting block, the dust removal head is installed on the second connecting block, and the suction pipe is connected to the negative pressure interface through a suction hose.

Images