Burr treatment device and lithium supplementing equipment

Abstract

The utility model discloses a burr treatment device and lithium supplementing equipment. The burr treatment device comprises a covering assembly and a burr treatment assembly, wherein the covering assembly comprises a pressing roller, a first covering roller and a second covering roller; the first conveying assembly is used for conveying the lithium strip to the position between the pressing roller and the first covering roller and the position between the first covering roller and the second covering roller; the second conveying assembly is used for conveying the pole piece to the position between the first covering roller and the second covering roller so that the pole piece can be covered with the lithium strip; and the clearing assembly comprises a first scraper and a second scraper which are arranged on the upstream of the second covering roller, the first scraper is used for cutting off the broadening part of the lithium strip output between the pressing roller and the first covering roller, and the second scraper is used for scraping edge burrs of the lithium strip formed after cutting off of the first scraper. According to the burr treatment device, concave and convex points formed on the pole piece can be reduced to a certain extent, and the product yield can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lithium supplementing for pole pieces, in particular to a burr processing device and lithium supplementing equipment. BACKGROUND

[0002] In the lithium supplementing equipment of the related art, a doctor blade is used to trim the edges of the lithium ribbon, so as to make the edges of the lithium ribbon uniform. However, burrs will be formed on the edges of the lithium ribbon after trimming. When the lithium ribbon is printed on the pole piece, the burrs will form concave-convex points, which will reduce the product yield. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides a burr processing device and lithium supplementing equipment, which can make the edges of the lithium ribbon flat, reduce the concave-convex points formed on the pole piece to a certain extent when the lithium ribbon is laminated with the pole piece, and is beneficial to improving the product yield.

[0004] In a first aspect, the present application provides a burr processing device, which comprises:

[0005] a lamination assembly, the lamination assembly comprising a compression roller, a first lamination roller and a second lamination roller;

[0006] a first conveying assembly, the first conveying assembly being configured to convey the lithium ribbon between the compression roller and the first lamination roller, and between the first lamination roller and the second lamination roller;

[0007] a second conveying assembly, the second conveying assembly being configured to convey the pole piece between the first lamination roller and the second lamination roller so as to laminate the pole piece with the lithium ribbon;

[0008] a cleaning assembly, the cleaning assembly comprising a first doctor blade and a second doctor blade arranged upstream of the second lamination roller, the first doctor blade being configured to cut off the expanded part of the lithium ribbon output between the compression roller and the first lamination roller, and the second doctor blade being configured to scrape off the edge burrs of the lithium ribbon formed after the cutting off by the first doctor blade.

[0009] In the technical scheme of the present application, the second doctor blade is used to scrape off the edge burrs of the lithium ribbon formed after the cutting off by the first doctor blade, so as to make the edges of the lithium ribbon flat, and to reduce the concave-convex points formed on the pole piece to a certain extent when the lithium ribbon is laminated with the pole piece, which is beneficial to improving the product yield.

[0010] In some embodiments, the second doctor blade comprises a doctor blade, and an included angle between the doctor blade and the tangential direction of the first lamination roller is 30 degrees to 60 degrees.

[0011] In the above embodiments, by setting the included angle between the doctor blade and the tangential direction of the first lamination roller to 30 degrees to 60 degrees, the scraping effect of the lithium burrs can be ensured to a certain extent, and the first lamination roller can be prevented from being damaged.

[0012] In some embodiments, the second scraper comprises a blade, and a thickness of the blade is 0.05mm to 0.1mm.

[0013] In the above embodiments, by setting the thickness of the blade to be 0.05mm to 0.1mm, the burr scraping effect can be ensured to a certain extent, and the lithium ribbon can be prevented from being damaged.

[0014] In some embodiments, the second scraper comprises a base body and a release coating, and the release coating covers the base body.

[0015] In the above embodiments, by covering the base body with the release coating to form the second scraper, the lithium scraps removed by the second scraper can be prevented from adhering to the second scraper to a certain extent, so that the second scraper can work continuously and efficiently, and the scraping effect can be prevented from being affected by the accumulation of lithium scraps.

[0016] In some embodiments, the burr processing device comprises a collection assembly for collecting materials removed by the first scraper and / or the second scraper.

[0017] In the above embodiments, by collecting the materials removed by the first scraper and / or the second scraper with the collection assembly, the materials can be prevented from scattering into the working area to a certain extent, the subsequent process can be ensured to proceed smoothly, and the waste recovery can be facilitated to meet the environmental protection requirements in industrial production.

[0018] In some embodiments, the collection assembly comprises a filter and a negative pressure generator, the filter is provided with a containing cavity having a collection opening, and the negative pressure generator is in communication with the containing cavity and is used to generate negative pressure in the containing cavity to suck the materials into the containing cavity from the collection opening.

[0019] In the above embodiments, by providing the filter and the negative pressure generator, the filter is provided with the containing cavity, the materials can be stored in the containing cavity of the filter to collect the materials, and the larger materials can be prevented from directly falling into the negative pressure generator to a certain extent to cause the negative pressure generator to be blocked.

[0020] In some embodiments, the negative pressure generator comprises a body, a suction port, an air inlet and an air outlet, the suction port is arranged on a first side of the body facing the filter, and the air inlet and the air outlet are arranged on a second side of the body different from the first side.

[0021] In the above embodiment, by arranging the air inlet on the first side of the body facing the filter, and arranging the air inlet and the air outlet on the second side of the body different from the first side, negative pressure can be generated in the containing cavity of the filter, so that the material removed by the removal assembly is sucked into the containing cavity from the collection port for storage, thereby avoiding the removed material from scattering into the working area to a certain extent, ensuring the smooth progress of the subsequent process, facilitating waste recycling, and meeting the environmental protection requirements in industrial production.

[0022] In some embodiments, the volume of the containing cavity is 90 to 110 milliliters.

[0023] In the above embodiment, by arranging the volume of the containing cavity to be 90 to 110 milliliters, the space occupied by the filter can be reduced to a certain extent, and the cleaning frequency of the filter can be reduced.

[0024] In some embodiments, the burr processing device comprises a coating assembly for coating a release agent on the lithium ribbon before being conveyed to the compression roller and the first laminating roller.

[0025] In the above embodiment, by coating the lithium ribbon before being conveyed to the compression roller and the first laminating roller with the coating assembly, the lithium ribbon can be smoothly attached to the roller surface of the first laminating roller and the pole piece in turn, thereby realizing the pre-lithiation of the pole piece.

[0026] In some embodiments, the first scraper is arranged close to the compression roller, and the second scraper is arranged close to the second laminating roller.

[0027] In the above embodiment, by arranging the first scraper close to the compression roller and the second scraper close to the second laminating roller, the influence of the first scraper on the second scraper can be reduced to a certain extent, thereby ensuring the scraping effect of the lithium burr to a certain extent, reducing the formation of concave-convex points on the pole piece, and improving the product yield.

[0028] In a second aspect, the present application provides a lithium supplementing equipment comprising the burr processing device of any one of the above embodiments.

[0029] The above lithium supplementing equipment can reduce the concave-convex points on the pre-lithiated pole piece produced by the lithium supplementing equipment to a certain extent, thereby improving the product yield.

[0030] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the scope of the present application. The same reference numbers in different drawings identify the same components. In the drawings:

[0032] Figure 1 Structure diagram of a burr processing device for some embodiments of the present application;

[0033] Figure 2 Structure diagram of a negative pressure generator for some embodiments of the present application;

[0034] Figure 3 Structure diagram of a filter for some embodiments of the present application.

[0035] The reference signs in the detailed description are as follows:

[0036] Burr processing device 1000;

[0037] Laminating assembly 100, compression roller 101, first laminating roller 102, second laminating roller 103, support roller 104;

[0038] First conveying assembly 200, lithium strip unwinding roller 201;

[0039] Second conveying assembly 300, pole piece unwinding roller 301, pre-lithium pole piece collecting roller 302;

[0040] Cleaning assembly 400, first scraper 401, second scraper 402, scraper plate 403;

[0041] Collecting assembly 500, filter 501, negative pressure generator 502, containing cavity 5011, collecting port 5012, body 5021, air suction port 5022, air inlet port 5023, air outlet port 5024, first side surface 5025, second side surface 5026;

[0042] Coating assembly 600, first roller 601, second roller 602;

[0043] Lithium strip 10, pole piece 20. DETAILED DESCRIPTION

[0044] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a use of the plural and vice versa.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0047] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments, and is not necessarily mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "linking", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions.

[0053] Unless otherwise specified, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions.

[0054] At present, from the development of market situation, lithium batteries are usually used as power batteries. The power batteries are not only applied to energy storage power supply systems such as hydraulic, thermal, wind and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles and electric vehicles, and many fields such as military equipment and aerospace. With the continuous expansion of the application field of power batteries, the demand of its market is also increasing.

[0055] In the working process of lithium battery, lithium ions will continuously migrate between the positive and negative electrodes in the charge and discharge cycle. Due to high rate charging or uneven current distribution, etc., lithium ions may be deposited unevenly on the surface of the battery, leading to the generation of lithium dendrites or the "loss" or "loss" of lithium ions in some areas, thereby causing the capacity decline and cycle life decline of the battery.

[0056] In order to repair or balance the distribution of lithium ions in the lithium battery, solve the possible lithium ion loss of the lithium battery in use, additional lithium ions can be introduced into the electrode material to compensate for the lithium loss in the cycle process of the battery during the manufacturing process of the lithium battery, that is, the pre-lithiation technology, and the electrode sheet after applying the pre-lithiation technology is called pre-lithium electrode sheet.

[0057] In the production process of the pre-lithium electrode sheet, a doctor blade is used to trim the edge of the lithium strip to make the edge of the lithium strip uniform. However, after trimming, the edge of the lithium strip will have burrs. When the lithium strip is printed on the electrode sheet, the burrs will form concave and convex points, which will reduce the product yield.

[0058] Based on the above considerations, in order to solve the problem that when the lithium strip is printed on the pole piece, burr will form concave and convex points, the application provides a burr processing device 1000, which scrapes the edge burr of the lithium strip 10 formed after the first scraper 401 cuts off, so as to make the edge of the lithium strip 10 flat, and when the lithium strip 10 is overlapped with the pole piece 20, the concave and convex points formed on the pole piece 20 can be reduced to a certain extent, which is beneficial to improve the product yield.

[0059] According to some embodiments of the application, referring to Figure 1 , the application provides a burr processing device 1000. The burr processing device 1000 includes an overlapping assembly 100, a first conveying assembly 200, a second conveying assembly 300, and a cleaning assembly 400. The overlapping assembly 100 includes a compression roller 101, a first overlapping roller 102, and a second overlapping roller 103. The first conveying assembly 200 is used to convey the lithium strip 10 to between the compression roller 101 and the first overlapping roller 102, and between the first overlapping roller 102 and the second overlapping roller 103. The second conveying assembly 300 is used to convey the pole piece 20 to between the first overlapping roller 102 and the second overlapping roller 103 to overlap the pole piece 20 with the lithium strip 10. The cleaning assembly 400 includes a first scraper 401 and a second scraper 402 arranged upstream of the second overlapping roller 103. The first scraper 401 is used to cut off the spread part of the lithium strip 10 output between the compression roller 101 and the first overlapping roller 102. The second scraper 402 is used to scrape the edge burr of the lithium strip 10 formed after the first scraper 401 cuts off.

[0060] The burr processing device 1000 is a device for scraping the edge burr of the lithium strip 10 generated during processing to ensure the flatness of the lithium strip 10 and the pole piece 20 after overlapping.

[0061] The overlapping assembly 100 includes the compression roller 101, the first overlapping roller 102, and the second overlapping roller 103 arranged in sequence. The compression roller 101 is arranged opposite to the first overlapping roller 102, and the compression roller 101 and the first overlapping roller 102 can calender the lithium strip 10 to make it thinner. The first overlapping roller 102 and the second overlapping roller 103 are arranged opposite to each other, and the first overlapping roller 102 and the second overlapping roller 103 can overlap the thinned lithium strip 10 with the pole piece 20 to form a pre-lithium pole piece 20.

[0062] It should be noted that the specific arrangement forms of the compression roller 101, the first laminating roller 102 and the second laminating roller 103 are not limited in the embodiments of the present application. Generally, the compression roller 101, the first laminating roller 102 and the second laminating roller 103 can be arranged in sequence along the horizontal direction, or the compression roller 101, the first laminating roller 102 and the second laminating roller 103 can be arranged in sequence along the vertical direction, or the compression roller 101, the first laminating roller 102 and the second laminating roller 103 can be arranged in a triangular shape. Of course, the specific arrangement forms of the compression roller 101, the first laminating roller 102 and the second laminating roller 103 can be determined according to the working condition requirements matched by the burr processing device 1000.

[0063] The first conveying assembly 200 is used to convey the lithium ribbon 10 to the compression roller 101 and the first laminating roller 102, the compression roller 101 and the first laminating roller 102 are used to roll the lithium ribbon 10, and then the rolled lithium ribbon 10 is conveyed to the first laminating roller 102 and the second laminating roller 103, and the first laminating roller 102 and the second laminating roller 103 are used to laminate the lithium ribbon 10 and the pole piece 20. In an embodiment, the first conveying assembly 200 includes a lithium ribbon unwinding roller 201. The lithium ribbon 10 can be wound on the lithium ribbon unwinding roller 201.

[0064] The second conveying assembly 300 is used to convey the pole piece 20 to the first laminating roller 102 and the second laminating roller 103, and the first laminating roller 102 and the second laminating roller 103 are used to laminate the pole piece 20 and the rolled lithium ribbon 10 to form a pre-lithium pole piece 20. In an embodiment, the second conveying assembly 300 includes a pole piece unwinding roller 301 and a pre-lithium pole piece collecting roller 302. The pole piece 20 can be wound on the pole piece unwinding roller 301, and the pre-lithium pole piece collecting roller 302 can collect the pre-lithium pole piece 20.

[0065] It can be understood that before the lithium ribbon 10 is conveyed to the compression roller 101 and the first laminating roller 102, the thickness of the lithium ribbon 10 is greater than the roll gap between the compression roller 101 and the first laminating roller 102.

[0066] It can be understood that, with the rotation of the first laminating roller 102, the lithium ribbon 10 attached to the first laminating roller 102 will be sent into the first laminating roller 102 and the second laminating roller 103, and at the same time, the lithium ribbon 10 and the pole piece 20 are located in the nip of the first laminating roller 102 and the second laminating roller 103 due to the second conveying assembly 300 sending the pole piece 20 into the first laminating roller 102 and the second laminating roller 103; compared with the roll surface of the first laminating roller 102, the pole piece 20 has a larger surface roughness, and the adhesion between the lithium ribbon 10 and the pole piece 20 is greater than the adhesion between the lithium ribbon 10 and the first laminating roller 102, so that when the lithium ribbon 10 contacts and is pressed by the pole piece 20, the lithium ribbon 10 will be attached to the pole piece 20, and with the conveying of the pole piece 20, the pole piece 20 will pull the lithium ribbon 10 and make the lithium ribbon 10 peel off from the roll surface of the first laminating roller 102, so that the pre-lithium pole piece 20 is formed, and the pre-lithiation process of the pole piece 20 is completed.

[0067] The pressure roller 101, the cleaning assembly 400, and the second laminating roller 103 are sequentially arranged along the rotation direction of the first laminating roller 102, and the cleaning assembly 400 is configured to abut against the roll surface of the first laminating roller 102, so that the uneven width of the lithium ribbon 10 after being pressed by the pressure roller 101 and the first laminating roller 102 is cut off by the first scraper 401, and the lithium burrs formed on the edge of the lithium ribbon 10 after being processed by the first scraper 401 are scraped off by the second scraper 402 before the lithium ribbon 10 is laminated with the pole piece 20.

[0068] It can be understood that, during the rotation of the first laminating roller 102, the lithium ribbon 10 in the same area on the roll surface of the first laminating roller 102 will be sequentially opposite to the pressure roller 101, the first scraper 401, the second scraper 402, and the second laminating roller 103, so that the lithium ribbon 10 in the area will be subjected to the cleaning process of the cleaning assembly 400 after being pressed and before being laminated; since the cleaning assembly 400 abuts against the roll surface of the first laminating roller 102, the first scraper 401 and the second scraper 402 of the cleaning assembly 400 will move relative to the first laminating roller 102 during the rotation of the first laminating roller 102, and the first scraper 401 will cut off the width of the lithium ribbon 10 on the first laminating roller 102, and the second scraper 402 will scrape off the lithium burrs formed on the edge of the lithium ribbon 10 after being processed by the first scraper 401, so as to solve the problem that the lithium burrs will form concave and convex points when the lithium ribbon 10 is printed on the pole piece 20. The width direction is perpendicular to the horizontal direction and the vertical direction.

[0069] It should be noted that after the calendering of the compression roller 101 and the first laminating roller 102, the lithium ribbon 10 will produce uneven stretching in the width direction, so that when the lithium ribbon 10 is laminated to the pole piece 20, it may cause uneven lithium coating of the pole piece 20, resulting in a great risk of lithium precipitation of the pre-lithium pole piece 20 when applied to the battery, which seriously affects the performance of the battery monomer. By cutting off the unevenly stretched part of the lithium ribbon 10 in the width direction by the first scraper 401 before the lithium ribbon 10 is laminated to the pole piece 20, the uniformity of the width of the lithium ribbon 10 can be controlled to ensure that the lithium ribbon 10 is uniformly laminated to the pole piece 20, thereby reducing the risk of lithium precipitation of the pole piece 20 when applied, and further improving the performance of the battery. However, after the first scraper 401 cuts off the unevenly stretched part of the lithium ribbon 10, burrs are easily formed, which may cause concave and convex points on the pole piece 20 when the lithium ribbon 10 is transferred to the pole piece 20.

[0070] It should be noted that the first scraper 401 and the second scraper 402 are arranged in sequence upstream of the second laminating roller 103. The upstream of the second laminating roller 103 refers to the part between the position where the lithium ribbon 10 starts to adhere to the first laminating roller 102 along the turning direction of the first laminating roller 102 and the position where the lithium ribbon 10 starts to transfer to the pole piece 20.

[0071] It should be noted that in Figure 1 , the arrow indicates the rotation direction of the roller.

[0072] The second scraper 402 removes the edge burrs of the lithium ribbon 10 formed after the first scraper 401 cuts off, so that the edge of the lithium ribbon 10 is flat, which can to some extent reduce the concave and convex points formed on the pole piece 20 when the lithium ribbon 10 is laminated to the pole piece 20, and is beneficial to improve the product yield.

[0073] According to some embodiments of the present application, optionally, please refer to Figure 1 , the scraper 403 includes a scraper 403, and the included angle a between the scraper 403 and the tangent direction of the first laminating roller 102 is 30 degrees to 60 degrees.

[0074] In some examples, the included angle a between the scraper 403 and the tangent direction of the first laminating roller 102 is 30°, 35°, 40°, 45°, 50°, 55°, 60°, or other values satisfying 30°≤a≤60°. The scraper 403 is a flat or slightly curved sheet with a certain hardness. The edge of the scraper 403 at least partially abuts the roller surface of the first laminating roller 102. The included angle a between the scraper 403 and the tangent direction of the first laminating roller 102 is 30 degrees to 60 degrees.

[0075] It should be noted that the tangent direction of the first laminating roller 102 is the tangent direction of the edge of the scraper 403 abutting the roller surface of the first laminating roller 102.

[0076] It should be noted that the pressing effect of the scraper 403 on the roller surface of the first laminating roller 102 is directly related to the specific value of the included angle α, because the pressing effect of the scraper 403 on the roller surface of the first laminating roller 102 can be roughly equivalent to the component of the force on the scraper 403 in the direction perpendicular to the above-mentioned tangent.

[0077] Understandably, if the angle α between the scraper 403 and the tangential direction of the first laminating roller 102 is too large, the component of the force on the scraper 403 perpendicular to the tangential direction will be too large. In this case, the scraper 403 will exert too much pressure on the roller surface of the first laminating roller 102, which may damage the first laminating roller 102. If the angle α between the scraper 403 and the tangential direction of the first laminating roller 102 is too small, the component of the force on the scraper 403 perpendicular to the tangential direction will be too small. In this case, the scraper 403 will exert too little pressure on the roller surface of the first laminating roller 102, and the scraper 403 will have a poor scraping effect when scraping off lithium burrs, or even be unable to achieve the scraping effect.

[0078] The materials of scraper 403 include, but are not limited to, polytetrafluoroethylene (PTFE).

[0079] The material of the first scraper 401 includes, but is not limited to, ultra-high molecular weight polyethylene (UHMW-PE).

[0080] By setting the angle between the scraper 403 and the tangential direction of the first laminating roller 102 to 30 degrees to 60 degrees, the scraping effect of lithium burrs can be ensured to a certain extent, while avoiding damage to the first laminating roller 102.

[0081] According to some embodiments of this application, optionally, please refer to... Figure 1 The second scraper 402 includes a scraper 403, the thickness of which is 0.05 mm to 0.1 mm.

[0082] It is understandable that the structural strength of the scraper 403 is directly related to the specific value of its thickness; the thickness of the scraper 403 is directly proportional to its structural strength. If the thickness of the scraper 403 is too large, its structural strength will be too strong, resulting in excessive pressure between the scraper 403 and the lithium strip 10, which may cause tearing and damage to the lithium strip 10. If the thickness of the scraper 403 is too small, its structural strength will be too weak, making it prone to deformation or breakage. In this case, the scraper 403 will have a poor scraping effect when removing lithium burrs, or even fail to achieve the desired scraping effect.

[0083] By setting the thickness of the scraper 403 to 0.05mm to 0.1mm, the scraping effect of burrs can be ensured to a certain extent, while avoiding damage to the lithium strip 10.

[0084] In some examples, the thickness S of scraper 403 is 0.05 mm, 0.06 mm, 0.07 mm, 0.08 mm, 0.09 mm, 0.1 mm or other values ​​that satisfy 0.05 mm ≤ S ≤ 0.1 mm.

[0085] According to some embodiments of this application, optionally, the second scraper 402 includes a substrate and a release coating, the release coating covering the substrate.

[0086] The substrate is the main structure of the second scraper 402, providing mechanical support and shape. The substrate has sufficient hardness and toughness to withstand the mechanical stress during the scraping of lithium burrs, thus ensuring to a certain extent that the second scraper 402 is not easily deformed or damaged during use.

[0087] Release coating is a functional coating that covers the surface of a substrate. It can be used to prevent lithium debris scraped off by the second scraper 402 from adhering to the second scraper 402, and at the same time, it can be used to protect the surface of the second scraper.

[0088] Optionally, the release coating can be applied to the surface of the substrate by spraying, dipping, brushing, or other methods. This application does not impose specific limitations.

[0089] Release coatings include, but are not limited to, fluoropolymers, silicone resins, or other materials with excellent release properties.

[0090] By covering the substrate with a release coating to form the second scraper 402, the lithium debris scraped by the second scraper 402 can be prevented from adhering to the second scraper 402 to a certain extent, which is conducive to the continuous and efficient operation of the second scraper 402 and avoids the scraping effect being affected by the accumulation of lithium debris.

[0091] According to some embodiments of this application, optionally, please refer to... Figure 1 The burr removal device 1000 includes a collection component 500 for collecting material removed by the first scraper 401 and / or the second scraper 402.

[0092] The collection component 500 may include a first collection component 500 and a second collection component 500. The first collection component 500 is used to collect the wide portion cut off by the first scraper 401, and the second collection component 500 is used to collect the lithium shavings scraped off by the second scraper 402.

[0093] It is understandable that after the cleaning component 400 cleans the lithium strip 10 on the roller surface of the second laminating roller 103, the removed wide portion and lithium debris may remain on the roller surface of the second laminating roller 103, the first scraper 401 and the second scraper. The residual lithium material may affect the subsequent adhesion of the lithium strip 10 on the second laminating roller 103, the cleaning effect of the first scraper 401 and the second scraper 402, and the transfer to the electrode 20. The cleaning component of this embodiment can apply a suction action to the roller surface of the second laminating roller 103, the surface of the first scraper 401 and the second scraper 402, and remove the residual lithium material on the roller surface of the second laminating roller 103, the surface of the first scraper 401 and the second scraper 402, to ensure that the roller surface of the second laminating roller 103, the surface of the first scraper 401 and the second scraper 402 remain clean. At the same time, the cleaning component 400 of this embodiment can recycle the scraped lithium material for centralized processing.

[0094] By collecting the material removed by the first scraper 401 and / or the second scraper 402 through the collection component 500, the material removed can be prevented from scattering into the working area to a certain extent, ensuring the smooth progress of subsequent processes and facilitating waste recycling, thus meeting the environmental protection requirements in industrial production.

[0095] According to some embodiments of this application, optionally, please refer to... Figure 1 and Figure 3 The collection assembly 500 includes a filter 501 and a negative pressure generator 502. The filter 501 has a receiving cavity 5011 with a collection port 5012, and the negative pressure generator 502 communicates with the receiving cavity 5011. The negative pressure generator 502 is used to generate a negative pressure in the receiving cavity 5011 to draw material from the collection port 5012 into the receiving cavity 5011.

[0096] The filter 501 is positioned closer to the first scraper 401 and / or the second scraper 402 than the negative pressure generator 502.

[0097] When the negative pressure generator 502 is working, it can generate negative pressure in the receiving cavity 5011 of the filter 501. Under the action of negative pressure, the air near the filter 501 is drawn into the receiving cavity 5011 from the collection port 5012. At the same time, the nearby lithium debris is drawn into the receiving cavity 5011 from the collection port 5012 along with the air.

[0098] It is understandable that the collection port 5012 is located near the first scraper 401 and / or the second scraper 402 so that the lithium material removed by the first scraper 401 and / or the second scraper 402 can be smoothly sucked into the receiving cavity 5011 from the collection port 5012.

[0099] It is understandable that the negative pressure generator 502 is connected to the receiving cavity 5011 to generate negative pressure in the receiving cavity 5011 so that the material is drawn into the receiving cavity 5011 from the collection port 5012. At the same time, the filter 501 can prevent larger materials from falling directly into the negative pressure generator 502 and causing the negative pressure generator 502 to become blocked.

[0100] By setting up a filter 501 and a negative pressure generator 502, the filter 501 is provided with a receiving cavity 5011, which allows materials to be stored in the receiving cavity 5011 of the filter 501 for material collection, while at the same time preventing larger materials from falling directly into the negative pressure generator 502 and causing the negative pressure generator 502 to become blocked.

[0101] According to some embodiments of this application, optionally, please refer to... Figure 2 The negative pressure generator 502 includes a body 5021, an air intake 5022, an air inlet 5023, and an air outlet 5024. The air intake 5022 is located on a first side 5025 of the body 5021 facing the filter 501, while the air inlet 5023 and the air outlet 5024 are located on a second side 5026 of the body 5021 that is different from the first side 5025.

[0102] The main body 5021 is the main structure of the negative pressure generator 502 and can be used to house and support other component parts of the negative pressure generator 502.

[0103] In this application, the air inlet 5023 and air outlet 5024 are located at both ends of the body 5021 in a first direction, thus forming an airflow path within the body 5021. The air intake 5022 is located on the first side 5025 of the body 5021 facing the filter 501 and communicates with the airflow path. Compressed air is introduced into the air inlet 5023, and the compressed air can be discharged from the air outlet 5024 along the airflow path. When the compressed air flows in the airflow path, the pressure at the air intake 5022 decreases, thereby forming a negative pressure. The first direction can be horizontal.

[0104] In one example, introducing 0.5 MPa of compressed air into the air inlet 5023 can create a negative pressure of approximately 9 kPa at the air intake 5022.

[0105] It should be noted that, in Figure 2 In the image, the arrow indicates the direction of airflow.

[0106] With the air intake 5022 located on the first side 5025 of the body 5021 facing the filter 501, and the air inlet 5023 and air outlet 5024 located on the second side 5026 of the body 5021 different from the first side 5025, a negative pressure can be generated in the receiving cavity 5011 of the filter 501. This allows the material removed by the cleaning component 400 to be sucked into the receiving cavity 5011 from the collection port 5012 and stored therein. This, to a certain extent, prevents the removed material from scattering into the working area, ensuring the smooth progress of subsequent processes and facilitating waste recycling, thus meeting the environmental protection requirements in industrial production.

[0107] According to some embodiments of this application, optionally, please refer to... Figure 3 The volume of the receiving cavity 5011 is 90 to 110 milliliters (ml).

[0108] The cleaning frequency and volume of filter 501 are directly related to the specific values ​​of the volume of receiving cavity 5011. The cleaning frequency of filter 501 is inversely proportional to the volume of receiving cavity 5011, while the volume of filter 501 is directly proportional to the volume of receiving cavity 5011. If the volume of receiving cavity 5011 is too large, the volume of filter 501 will be too large, which may occupy more space, thereby increasing cost and complexity of the deburring device 1000. If the volume of receiving cavity 5011 is too small, the cleaning frequency of filter 501 will be too high, requiring frequent cleaning, thus increasing maintenance costs and operational difficulty.

[0109] In one embodiment, a filter 501 and a negative pressure generator 502 are provided near the second scraper 402. The receiving cavity 5011 has a volume of 90 to 110 ml and can hold approximately 1.5-2 g of lithium scrap.

[0110] In some examples, the volume V of the receiving cavity 5011 is 90ml, 92ml, 94ml, 96ml, 98ml, 100ml, 102ml, 104ml, 106ml, 108ml, 110ml or other values ​​that satisfy 90ml≤V≤110ml.

[0111] By setting the volume of the receiving cavity 5011 to 90 to 110 ml, the space occupied by the filter 501 can be reduced to a certain extent, while the cleaning frequency of the filter 501 can be reduced.

[0112] According to some embodiments of this application, optionally, please refer to... Figure 1 The burr removal device 1000 includes a coating assembly 600 for coating a release agent onto the lithium strip 10 before it is conveyed to the pressure roller 101 and the first laminating roller 102.

[0113] Optionally, the release agent may include, but is not limited to, fluoropolymers, silicone resins, or other materials with excellent release properties.

[0114] like Figure 1 As shown, the coating assembly 600 includes a first roller 601 and a second roller 602. The first roller 601 abuts against the side of the lithium belt 10 facing the pressure roller 101, and the second roller 602 abuts against the side of the lithium belt 10 facing the first laminating roller 102. The first roller 601 can pick up a first release agent and apply it to the side of the lithium belt 10 facing the pressure roller 101, and the second roller 602 can pick up a second release agent and apply it to the side of the lithium belt 10 facing the first laminating roller 102. The viscosity of the first release agent is less than that of the second release agent, so that the lithium belt 10 can be smoothly adhered to the roller surface of the first laminating roller 102 after being calendered by the pressure roller 101 and the first laminating roller 102.

[0115] It is understandable that the viscosity of the second release agent is less than that of the electrode 20, so that when the lithium strip 10 is laminated with the electrode 20, the lithium strip 10 can be smoothly peeled off from the roller surface of the first laminating roller 102 and attached to the electrode 20.

[0116] By applying a release agent to the lithium strip 10 that is fed to the pressure roller 101 and the first laminating roller 102 by the coating assembly 600, the lithium strip 10 can be smoothly and sequentially attached to the roller surface of the first laminating roller 102 and the electrode 20, thereby achieving the pre-lithiation of the electrode 20.

[0117] According to some embodiments of this application, optionally, please refer to... Figure 1 The first scraper 401 is positioned close to the pressure roller 101, and the second scraper 402 is positioned close to the second laminating roller 103.

[0118] The first scraper 401 and the second scraper 402 are sequentially disposed upstream of the second laminating roller 103. The first scraper 401 abuts against the roller surface of the first laminating roller 102 and is disposed close to the pressure roller 101, and the second scraper 402 abuts against the roller surface of the first laminating roller 102 and is disposed close to the second laminating roller 103. That is, the first scraper 401 and the second scraper 402 abut against the first laminating roller 102 and are disposed at intervals. This allows the small wrinkles that may be generated after the first scraper 401 cuts the lithium strip 10 before it reaches the second scraper 402 to be gradually smoothed out under the rotation of the first laminating roller 102, thus avoiding accidental scraping by the second scraper 402 to a certain extent.

[0119] By setting the first scraper 401 close to the pressure roller 101 and the second scraper 402 close to the second laminating roller 103, the influence of the first scraper 401 on the second scraper 402 can be reduced to a certain extent, thereby ensuring the scraping effect of lithium burrs to a certain extent, reducing the formation of bumps on the electrode 20, and improving the product yield.

[0120] In some embodiments, the laminating apparatus includes a support roller 104, which is located on the side of the pressure roller 101 opposite to the first laminating roller 102, and is in contact with and rotatable relative to the pressure roller 101. It is understood that the support roller 104 can support the pressure roller 101, thereby reducing deformation of the pressure roller 101 during long-term use, thus improving the thickness consistency of the lithium strip 10 after calendering, and increasing product yield.

[0121] According to some embodiments of this application, an embodiment of this application provides a lithium replenishment device. The lithium replenishment device includes a plurality of deburring devices 1000 as described in any of the above embodiments.

[0122] A lithium replenishment device is used to add lithium to a lithium battery. The device may include, but is not limited to, a deburring device 1000, a gas compression device, and a recovery system. The gas compression device generates compressed air and delivers it to the air inlet 5023 so that the collection component 500 can collect the material removed by the cleaning component 400. The recovery system is used to recycle the material collected by the collection component 500.

[0123] The burr removal device 1000 can reduce the bumps and dents on the pre-lithiation electrode 20 produced by the lithium replenishment equipment to a certain extent, thereby improving the product yield.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A burr processing device for a lithium supplementing apparatus, characterized by, The burr processing device comprises: a laminating assembly comprising a compression roller, a first laminating roller and a second laminating roller; a first conveying assembly for conveying a lithium ribbon between the compression roller and the first laminating roller, and between the first laminating roller and the second laminating roller; a second conveying assembly for conveying a tab between the first laminating roller and the second laminating roller to laminate the tab with the lithium ribbon; a cleaning assembly comprising a first scraper and a second scraper arranged upstream of the second laminating roller, the first scraper being configured to cut off a wide portion of the lithium ribbon output between the compression roller and the first laminating roller, and the second scraper being configured to scrape an edge burr of the lithium ribbon formed after the cutting off by the first scraper.

2. The burr treatment device according to claim 1, characterized by The second scraper comprises a scraper plate, and an angle between a tangent direction of the first laminating roller and the scraper plate is 30 degrees to 60 degrees.

3. The burr treatment device according to claim 1, characterized by The second scraper comprises a scraper plate, and a thickness of the scraper plate is 0.05 mm to 0.1 mm.

4. The burr treatment device according to any one of claims 1 to 3, characterized in that The second scraper comprises a base body and a release coating covering the base body.

5. The burr treatment device according to any one of claims 1 to 3, characterized in that The burr processing device comprises a collection assembly for collecting materials removed by the first scraper and / or the second scraper.

6. The burr treatment device according to claim 5, characterized by The collection assembly comprises a filter and a negative pressure generator, the filter is provided with a receiving cavity having a collection opening, and the negative pressure generator is in communication with the receiving cavity and is configured to generate a negative pressure in the receiving cavity to suck the materials from the collection opening into the receiving cavity.

7. The burr treatment device according to claim 6, characterized by The negative pressure generator comprises a body, an air suction opening, an air inlet and an air outlet, the air suction opening is arranged on a first side of the body facing the filter, and the air inlet and the air outlet are arranged on a second side of the body different from the first side.

8. The burr treatment device according to claim 6, characterized by A volume of the receiving cavity is 90 to 110 milliliters.

9. The burr treatment device according to any one of claims 1 to 3, characterized by The burr processing device comprises a coating assembly for coating a release agent on the lithium ribbon before being conveyed to the compression roller and the first laminating roller.

10. The burr treatment device according to any one of claims 1 to 3, characterized by The first scraper is arranged close to the compression roller, and the second scraper is arranged close to the second laminating roller.

11. A lithium supplementing apparatus, characterized by comprising: The burr processing device comprises the laminating assembly, the first conveying assembly, the second conveying assembly, the cleaning assembly, the collection assembly, the coating assembly, the first scraper and the second scraper.

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