Powder scraping apparatus, powder scraping processing system, and method for detecting degree of adhesive floating

Abstract

The application relates to a powder scraping device, a powder scraping treatment system and an adhesive floating degree detection method. The powder scraping device comprises a roller body and a scraper device. The roller body is rotatably arranged around a preset axis, and the roller body is provided with a fitting surface around the preset axis. The scraper device is located on one side in the circumferential direction of the roller body. In the technical scheme of the embodiment of the application, at least a part of the circumferential roller surface of the roller body is used as the fitting surface to lay the workpiece. The fitting surface is not easy to deform and has good flatness, so that the flatness of the workpiece laid on the fitting surface is good. When the scraper device performs the powder scraping operation, the powder scraping thickness is relatively uniform, thereby helping to improve the powder scraping precision of the powder scraping device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a powder scraping device, a powder scraping processing system, and a method for detecting the degree of binder floating. Background Technology

[0002] For workpieces with a coating layer on the surface, adhesive components are usually added to the coating layer to adhere it to the workpiece. For example, when the workpiece is an electrode, the active layer on the electrode, i.e. the coating layer, needs to have an adhesive added to the active slurry so that the active layer can be firmly adhered to the substrate of the electrode.

[0003] For workpieces with surface coatings (not limited to electrodes), a scraping device is typically used to scrape off the coating. "Scraping" refers to the process of removing the coating from the workpiece. There are various applications for scraping devices. In some cases, they can be used to remove excess coating from the workpiece to obtain a workpiece of the required specifications. In other cases, during adhesive floatation testing, the scraping device can also be used to scrape off a certain thickness of coating from the workpiece for experimental testing.

[0004] The powder scraping accuracy of a powder scraping machine affects both the finished workpiece dimensions and the detection results of the adhesive floatation level. Therefore, improving the powder scraping accuracy of a powder scraping machine is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of the above problems, this application provides a powder scraping device, a powder scraping processing system, and a method for detecting the degree of adhesive floating, aiming to improve the powder scraping accuracy of the powder scraping device, thereby improving the workpiece quality and the detection accuracy of the adhesive floating degree detection results.

[0006] In a first aspect, this application provides a powder scraping device, including a roller body and a scraper device. The roller body is rotatably arranged around a preset axis and has a contact surface arranged around the preset axis. The scraper device is located on one circumferential side of the roller body.

[0007] In the technical solution of this application embodiment, at least a portion of the circumferential roller surface of the roller body is used as the bonding surface to lay the workpiece. The bonding surface is not easily deformed and has good flatness, so that the flatness of the workpiece laid on the bonding surface is better. When the scraper device performs the scraping operation on the workpiece laid on the bonding surface, the scraping thickness is more consistent, which helps to improve the scraping accuracy of the scraping equipment.

[0008] In some embodiments, the powder scraping device further includes a fixing device arranged around the periphery of the roller body. In this case, the fixing device ensures that the workpiece remains in contact with the bonding surface, reducing the risk of displacement or even separation between the workpiece and the bonding surface. This helps improve the smoothness of the powder scraping process and enhances the powder scraping accuracy.

[0009] In some embodiments, the fixing device includes a clamping assembly disposed on the roller body. In this case, the workpiece is fixedly bonded to the bonding surface using the clamping assembly, and the structure is easy to implement.

[0010] In some embodiments, the clamping assembly includes a first rod and a second rod, the first rod having a first through-hole portion and the second rod having a second through-hole portion. The first and second rods are configured to move relative to each other in a first direction intersecting a predetermined axis, and have a first relative position and a second relative position during the relative movement. In the first relative position, the first and second through-hole portions are offset in the first direction; in the second relative position, the first and second through-hole portions are aligned in the first direction. At this time, by combining the relative movement of the first and second rods with the first through-hole portions and the second through-hole portions of the first rod, the clamping assembly can clamp and release the workpiece, resulting in a simple structure that is easy to implement.

[0011] In some embodiments, both the first and second rods extend along a second direction parallel to a preset axis, and both the first and second through-parts extend along the second direction. In this case, when the workpiece passes through the first and second through-parts, the width direction of the workpiece can be maintained substantially parallel to the preset axis. The possibility of the workpiece being twisted relative to the contact surface by the first and second rods is lower, resulting in better contact between the workpiece and the contact surface. This helps improve the flatness of the workpiece contacting the contact surface, thereby improving the powder scraping accuracy of the powder scraping equipment.

[0012] In some embodiments, a receiving space is formed inside the first rod, and the receiving space is connected to the first through-hole. The second rod is located in the receiving space. In this case, by placing the second rod inside the first rod, the space occupied by the second rod and the first rod is smaller, and the structure of the clamping assembly is more compact. At the same time, by placing the second rod inside the first rod, the workpiece can be clamped more reliably by utilizing the staggered first and second through-holes.

[0013] In some embodiments, the clamping assembly further includes a drive rod located in the receiving space, the drive rod being fixedly connected to the second rod and configured to be movably disposed relative to the first rod in a first direction. In this case, the structure of the clamping assembly is further compacted by the drive rod disposed within the receiving space, which drives the second rod to move relative to the first rod.

[0014] In some embodiments, the clamping assembly further includes a handle connected to the drive rod and configured to be operably movable relative to the first rod to drive the drive rod to move in a first direction. In this case, the handle facilitates manual operation of the drive rod by the user, reducing the configuration cost of the device.

[0015] In some embodiments, the handle is rotatably connected to the transmission rod and has an abutment position that abuts against the first rod. The handle is configured to rotate about the abutment position to drive the transmission rod to move in a first direction. In this case, by using the rotating handle to drive the transmission rod, the user can operate the handle with the abutment position as a fulcrum, making the operation more effortless.

[0016] In some embodiments, the clamping assembly further includes an elastic element that is elastically connected between the first and second rods along a first direction. The elastic element serves to prevent the first and second rods from moving away from the first relative position. In this case, the elastic element helps maintain the positional stability of the first and second rods in the first relative position, thus enhancing the clamping effect of the first and second rods on the workpiece.

[0017] In some embodiments, the fixing device further includes a movable component disposed on the roller body and connected to the clamping component, and used to drive the clamping component to move in a first direction. In this case, using the movable component to drive the entire clamping component to move in the first direction not only makes the installation of the workpiece more convenient, but also allows the workpiece to fit more tightly with the mating surface.

[0018] In some embodiments, the roller body further has a clearance surface, which is disposed adjacent to the contact surface along the circumference of the roller body. The clearance surface is recessed relative to the contact surface toward a preset axis and forms an opening groove, which is disposed through the roller body in a direction parallel to the preset axis. The opening groove is located on the moving path of the clamping assembly. In this case, the portion of the circumferential roller surface of the roller body serves as a clearance surface and forms an opening groove, which not only allows the clamping assembly to be cleared, providing more space for the installation of the workpiece, but also pulls the free end of the workpiece closer toward the preset axis, making the workpiece fit more tightly against the contact surface, thus helping to improve the powder scraping accuracy of the powder scraping equipment.

[0019] In some embodiments, the moving component includes a first link, a second link, and an intermediate link. One end of both the first and second links is spaced apart and rotatably mounted on the roller body about a direction parallel to a predetermined axis. A clamping component is mounted on the first link. One end of the intermediate link is rotatably mounted on the other end of the first link, and the other end of the intermediate link is connected to the other end of the second link. In this configuration, the user can operate the second link to move the clamping component in a first direction. The structure is compact and easy to implement.

[0020] In some embodiments, one end of the intermediate link and the other end of the second link have a connector, and the other has an arc-shaped connecting portion. The connector is fixedly disposed on the arc-shaped connecting portion and its position is adjustable in the extending direction of the arc-shaped connecting portion. The central axis of the arc-shaped connecting portion coincides with the rotation axis of the second link. At this time, by changing the position of the connector on the arc-shaped connecting portion, the distance between the clamping assembly and the preset axis in the fixed state can be changed. The closer the clamping assembly is to the preset axis, the better the clamping assembly's effect of tightly fitting the workpiece to the mating surface. Thus, the tightness of the workpiece can be adjusted according to the actual situation.

[0021] In some embodiments, the fixing device includes two sets of clamping assemblies, which are spaced apart in the circumferential direction of the roller. In this case, by using the two sets of clamping assemblies to clamp the first free end and the second free end of the workpiece respectively, the workpiece can be tightly fitted onto the bonding surface.

[0022] In some embodiments, the scraper device includes a blade holder and a blade support, the blade holder being disposed on the blade support, and the blade support being movably disposed relative to the roller body along a third direction intersecting a preset axis. In this case, the distance between the scraper device and the roller body can be changed by moving the blade support, which not only facilitates the replacement and installation of the blades but also provides operating space for the workpiece to be mounted on the roller body.

[0023] In some embodiments, the scraper device further includes an adjustment component connected between the blade holder and the blade support. The adjustment component is configured to adjust the position of the blade holder relative to the blade support in a fourth direction intersecting the third direction. In this case, the position of the blade holder in the fourth direction can be changed by adjusting the component, thereby changing the feed rate of the blades on the blade holder, allowing the user to adjust the feed rate according to needs, and improving the versatility of the scraper device.

[0024] In some embodiments, the adjusting assembly includes an adjusting threaded member, which is fixedly connected to the tool holder and the tool support, and extends along a fourth direction. The relative position of the tool holder and the tool support in the extending direction of the adjusting threaded member is adjustable. In this case, adjusting the relative position of the tool holder and the tool support by adjusting the threaded member is a simple and reliable structure.

[0025] In some embodiments, the powder scraping device further includes a receiving box, which is configured to be located on the same side of the roller as the scraper device. In this case, the receiving box can be used to collect the scraped-off sample, facilitating sample collection and keeping the device clean.

[0026] In some embodiments, the powder scraping device further includes a receiving platform, which is located on the same side of the roller body as the scraper device, and a receiving box is supported on the receiving platform. The receiving platform allows the receiving box to be closer to the position where the scraper device contacts the workpiece, enabling the receiving box to collect samples more effectively.

[0027] In some embodiments, the receiving platform has a weighing sensor, and the receiving box bears the weight of the weighing sensor. In this case, the weighing sensor on the receiving platform can weigh the sample, making it convenient for users to monitor the content of the scraped sample.

[0028] In some embodiments, the powder scraping device further includes a vision inspection device, which is fixedly disposed relative to the roller body. In this case, measuring the distance between the blade and the workpiece using the vision inspection device allows for convenient monitoring of their positional status and helps in adjusting the blade's feed rate.

[0029] In some embodiments, the powder scraping device further includes a feed plate, which is disposed on the opposite side of the roller body to the scraper device. In this case, the workpiece to be scraped can be placed on the feed plate for convenient subsequent powder scraping.

[0030] In some embodiments, the powder scraping device further includes a frame, with the rollers and scraper assembly all mounted on the frame. In this case, the entire structure of the powder scraping device is integrated using the frame, facilitating the transportation and use of the powder scraping device.

[0031] Secondly, this application provides a powder scraping system, which includes a sintering furnace, a balance device, and the powder scraping equipment in any of the above embodiments.

[0032] In some embodiments, a sample boat is provided inside the sintering furnace. The sample boat includes multiple sample placement areas, each of which can hold at least one crucible. In this case, the sample boat inside the sintering furnace has multiple sample placement areas, which can process a larger number of samples at the same time. This helps to improve the processing efficiency of the powder scraping system. Moreover, when processing the same multiple samples simultaneously, the test results obtained based on the heat treatment results of the same multiple samples are more accurate and reliable.

[0033] In some embodiments, the crucible includes a crucible body and a crucible lid. The crucible body has an opening, and the crucible lid closes to the opening. The crucible lid has a through hole communicating with the inside and outside of the crucible body. In this case, by providing a through hole in the crucible lid, the volatile substances of the sample can flow out of the crucible body through the through hole during the heat treatment process, which ensures both complete pyrolysis and sufficient release of reaction products, thus ensuring the reliability of the treatment process and the reliability of subsequent detection structures.

[0034] In some embodiments, the balance device includes an electronic balance with an accuracy of one part per hundred thousand. When the accuracy of the electronic balance reaches one part per hundred thousand, the high weighing accuracy of the electronic balance helps to improve the accuracy of subsequent structural testing.

[0035] In some embodiments, the powder scraping system further includes a processing device. In this case, configuring the processing device in the powder scraping system enables automated calculation of measurement results, reduces manual workload, and helps improve the accuracy of the detection results.

[0036] Thirdly, this application provides a method for detecting the degree of adhesive floating, which includes:

[0037] Based on any of the above embodiments, the powder scraping equipment obtains the upper and lower samples of the target workpiece;

[0038] The upper sample and the lower sample are heat-treated at the same at least one target temperature; the weight M of the upper sample before heat treatment is weighed and recorded for each of the target temperatures. 10 (T i ) and weight M after heat treatment 11 (T i ), and the weight M of the lower sample before heat treatment. 20 (T i ) and weight M after heat treatment 21 (T i ), where Ti represents the i-th target temperature, i is a positive integer less than or equal to N, N is the number of target temperatures, and the larger i is, the larger the target temperature represented by Ti is;

[0039] Based on M corresponding to all target temperatures 10 (T i M 11 (T i M 20 (T i ) and M 21 (T i The degree of adhesive floating on the target workpiece is obtained as δ.

[0040] In some embodiments, obtaining an upper sample and a lower sample of the target workpiece includes:

[0041] The powder in the upper, middle and lower regions of the target workpiece is scraped off sequentially along the thickness direction of the target workpiece.

[0042] The upper sample is obtained by scraping powder from the upper region, and the lower sample is obtained by scraping powder from the lower region.

[0043] At this point, the coating layer is divided into three regions along the thickness direction. The upper and lower regions are thinner, and the sample data from the upper and lower regions are more likely to reflect the true floating situation of the adhesive, resulting in more accurate test results.

[0044] In some embodiments, the thickness of the target workpiece is H, and the thicknesses H1 of the upper region, H2 of the middle region, and H3 of the lower region satisfy the following:

[0045] H1 = H2 = H3 = 1 / 3H, or H1 = H3 = 1 / 4H and H2 = 1 / 2H.

[0046] When H1 = H2 = H3 = 1 / 3H, it means that the thickness of the upper, middle and lower regions is the same. In this way, the feed amount of the scraper is the same each time it enters the blade, making the cutting process relatively simpler.

[0047] When H1 = H3 = 1 / 4H and H2 = 1 / 2H, it means that the thickness H1 of the upper region is the same as the thickness of the lower region, and their sum is equal to half the coating thickness H. The thickness H2 of the middle region is half the coating thickness H. In this case, the thicknesses of the upper and lower regions are the same and relatively small. The sample data from the upper and lower regions more easily reflect the true floating situation of the adhesive, and the test results are more accurate.

[0048] In some embodiments, after obtaining the upper and lower samples of the target workpiece, the method further includes:

[0049] The upper and lower samples are placed in the crucible;

[0050] Accordingly, M 10 (T i M 11 (T i M 20 (T i ) and M 21 (T i All of these include the mass of the crucible containing the corresponding sample.

[0051] At this point, using a crucible to hold the sample allows for heat treatment of the sample and also facilitates weighing the sample.

[0052] In some embodiments, based on M corresponding to all target temperatures 10 (T i M 11 (T i M 20 (T i ) and M 21 (T i The degree of adhesive float δ on the target workpiece is obtained, including:

[0053] Based on M corresponding to all target temperatures 10 (T i ) and M 11 (T i The content of the upper adhesive layer, S1, is obtained, and S1 satisfies:

[0054]

[0055] Based on M corresponding to all target temperatures 20 (T i ) and M21 (T i The content of the lower adhesive layer, S2, is obtained, and S2 satisfies:

[0056]

[0057] The degree of adhesive float on the target workpiece is obtained from S1 and S2, and δ satisfies:

[0058] At this point, by expressing the binder content as a percentage, the requirement for uniformity in the weight of each heat-treated sample is lower when heat-treating the upper and lower samples, simplifying the processing and improving detection efficiency.

[0059] In some embodiments, the target workpiece is a negative electrode sheet containing a dispersant and a negative electrode binder. The target temperature includes a first target temperature T1 and a second target temperature T2, where the first target temperature T1 is higher than the second target temperature T2. T1 corresponds to the thermal decomposition temperature of the dispersant, and the second target temperature T2 corresponds to the thermal decomposition temperature of the negative electrode binder. In this case, the degree of buoyancy of the negative electrode binder in the negative electrode sheet can be obtained.

[0060] In some embodiments, the target workpiece is a positive electrode sheet containing a positive electrode binder, and the target temperature includes only a first target temperature T1, which corresponds to the thermal decomposition temperature of the positive electrode binder. In this case, the degree to which the positive electrode binder floats in the positive electrode sheet can be obtained.

[0061] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0062] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0063] Figure 1 This is a top view of a workpiece according to one or more embodiments.

[0064] Figure 2 This is a schematic diagram of the internal structure of a workpiece according to one or more embodiments.

[0065] Figure 3 This is an enlarged schematic diagram of the workpiece at point I according to one or more embodiments.

[0066] Figure 4 This is a schematic diagram of the composition of a powder scraping system according to one or more embodiments.

[0067] Figure 5 This is a three-dimensional structural diagram of a powder scraping device according to one or more embodiments.

[0068] Figure 6 This is a front view schematic diagram of a powder scraping device according to one or more embodiments.

[0069] Figure 7 This is a top view schematic diagram of a powder scraping device according to one or more embodiments.

[0070] Figure 8 for Figure 5 An enlarged view of the powder scraping device of the illustrated embodiment at point II.

[0071] Figure 9 This is a schematic diagram showing the relative positions of a first member and a second member according to one or more embodiments.

[0072] Figure 10 for Figure 9 The cross-sectional view of the structure shown.

[0073] Figure 11 This is a schematic diagram showing a first member and a second member in a first relative position according to one or more embodiments.

[0074] Figure 12 This is a schematic diagram showing the first and second members in a second relative position according to one or more embodiments.

[0075] Figure 13 This is a schematic diagram illustrating the movement of the handle drive transmission rod according to one or more embodiments;

[0076] Figure 14 This is a partial structural schematic diagram of a clamping assembly according to one or more embodiments.

[0077] Figure 15 This is a schematic diagram of the structure of a roller according to one or more embodiments.

[0078] Figure 16 This is a schematic diagram of a clamping assembly in a mounting position according to one or more embodiments.

[0079] Figure 17 This is a schematic diagram of a clamping assembly in a fixed position according to one or more embodiments.

[0080] Figure 18 This is a schematic diagram of the internal structure of a sintering furnace according to one or more embodiments.

[0081] Figure 19 This is a schematic diagram of the structure of a crucible according to one or more embodiments.

[0082] Figure 20 This is a flowchart illustrating a method for detecting the degree of adhesive floatation according to one or more embodiments.

[0083] Figure 21 This is a partial flowchart of step P10 in the adhesive floating degree detection method according to one or more embodiments.

[0084] Figure 22 This is a flowchart illustrating step P30 in an adhesive floating degree detection method according to one or more embodiments.

[0085] The reference numerals in the detailed embodiments are as follows:

[0086] 01. Workpiece; 01a. Substrate; 01b. Coating layer; d1. First free end; d2. Second free end; H. Thickness direction; F. Longitudinal direction; W. Width direction; q1. Upper region; q2. Middle region; q3. Lower region; 1000. Powder scraping system; 100. Powder scraping equipment; X1. First direction; X2. Second direction; X3. Third direction; X4. Fourth direction; 10. Roller body; Z. Preset axis; m1. Fitting surface; m2. Clearance surface; C. Opening groove; p. Transfer groove; 11. Drive mechanism; 20. Scraper device; 21. Scraper holder; 22. Scraper post; 23. Adjustment component; 23a. Adjustment threaded component; 30. Fixing device; 31. Clamping component; 31a. First rod; g1. First through part; K. Accommodation space 31b, Second rod; g2, Second through part; w1, First relative position; w2, Second relative position; 31c, Transmission rod; 31d, Handle; J, Abutment position; 31f, Elastic element; b1, Installation position; b2, Fixed position; 32, Moving component; 32a, First connecting rod; 32b, Second connecting rod; 32c, Intermediate connecting rod; h1, Connecting part; h2, Arc connecting part; 40, Receiving box; 50, Receiving platform; 60, Weighing sensor; 70, Vision inspection device; 80, Feed plate; 90, Frame; 91, Support frame; 200, Sintering furnace; 210, Sample boat; Q, Sample placement area; 220, Crucible; 221, Crucible body; r1, Opening; 222, Crucible cover; r2, Through hole; 300, Balance device; 400, Processing device. Detailed Implementation

[0087] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0088] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0089] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0090] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0091] In the description of the embodiments in this application, the term "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0092] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0093] In the description of the embodiments of this application, if technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does 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. Therefore, it should not be construed as a limitation on the embodiments of this application.

[0094] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0095] A powder scraping device is a device that can scrape off a coating layer applied to the surface of a workpiece to a required thickness. Typically, a powder scraping device has a scraper and a mounting platform. When the scraper performs the powder scraping operation, the workpiece is laid on the mounting platform, and the scraper can extend into the coating layer of the workpiece laid on the mounting platform to a certain thickness. As the scraper moves relative to the mounting platform, the scraper scrapes off the coating layer within that thickness range.

[0096] In some designs, the installation platform is planar, such as an installation platform made of flat steel plate. During the installation process, bolts and other fasteners are usually used to fix the flat steel plate to other structures. The location of the fasteners is prone to stress concentration on the flat steel plate. Due to stress concentration, the flat steel plate is prone to deformation, which reduces its flatness. This, in turn, affects the flatness of the workpiece laid on the flat steel plate, resulting in a decrease in the powder scraping accuracy of the powder scraping equipment.

[0097] In addition, in flat installation platforms, when the scraper performs the scraping operation, the scraper and the installation platform are usually set at an angle. The scraper will exert an external force on the installation platform. When the flat installation platform resists the external force, the surrounding position has a smaller pulling force on the force-bearing position, which easily forms stress concentration at the force-bearing position, making the force-bearing position easy to deform and the flatness of the installation platform more likely to be reduced.

[0098] When the flatness of the installation platform decreases, the scraping thickness of the scraper becomes inconsistent during the scraping operation, resulting in a reduction in the amount of powder scraped by the scraping equipment.

[0099] To obtain a powder scraping device with high precision, the inventors of this application have designed a powder scraping device, including a roller body and a scraper device. At least a portion of the circumferential roller surface of the roller body serves as a contact surface for contacting and setting the workpiece. By utilizing at least a portion of the circumferential roller surface of the roller body for laying the workpiece, and since the roller body is typically rotatably mounted on other structures via its rotation axis, no fasteners are needed on its circumferential roller surface. Stress concentration points caused by fasteners are generally absent on the circumferential roller surface, making it less prone to deformation.

[0100] Moreover, when the scraper contacts the circumferential roller surface, the surrounding area exerts a greater pulling force on the stressed area. The scraper's force can be evenly transmitted to all parts of the circumferential roller surface, making it less prone to stress concentration at the stressed area. The stressed area has stronger resistance to deformation, and the circumferential roller surface is less prone to deformation.

[0101] At this time, because the circumferential roller surface is not easily deformed and has good flatness, the flatness of the workpiece laid on the bonding surface is better. When the scraper device performs the scraping operation, the scraping thickness is more consistent, which helps to improve the scraping accuracy of the scraping equipment.

[0102] Typically, when a coating layer is scraped off by a scraper, it is easily pulverized into powder. Of course, if the coating layer itself has good adhesion, it may also be in block form or a mixture of block and powder when scraped off. In this embodiment, the shape of the coating layer after it has been scraped off by the scraping device is not limited. In this embodiment, the substance obtained after the coating layer has been scraped off is referred to as a "sample".

[0103] The powder scraping device provided in this application embodiment is used to scrape powder off a workpiece with a coating layer on its surface. The workpiece may be, but is not limited to, an electrode sheet; for example, it may also be a thin film with a coating layer on its surface or a steel strip. The types of workpieces that the powder scraping device is suitable for are not limited in this application embodiment, and those skilled in the art can apply them flexibly according to actual conditions.

[0104] Figure 1 and Figure 2 The diagram shown is a structural schematic of workpiece 01 from different perspectives in one or more embodiments. Please refer to... Figure 1 and Figure 2 In some embodiments of this application, the workpiece 01 extends along its longitudinal direction F and has a first free end d1 and a second free end d2 in the longitudinal direction F. The longitudinal direction F generally refers to the length direction of the workpiece 01, and the workpiece 01 has a larger dimension in the longitudinal direction F. The workpiece 01 generally includes a substrate 01a and a coating layer 01b, and the coating layer 01b is applied to at least one side of the substrate 01a in the thickness direction H. The thickness direction H of the workpiece 01 is the stacking direction of the substrate 01a and the coating layer 01b, and the workpiece 01 has a smaller dimension in the thickness direction H. The coating layer 01b includes functional materials that perform specific functions, such as reflective materials, light-absorbing materials, and active materials in electrodes.

[0105] When workpiece 01 is an electrode sheet used in wound battery cells, its longitudinal direction F corresponds to the winding direction of the electrode sheet. When the electrode sheet is used in laminated battery cells, its thickness direction H corresponds to the lamination direction of the electrode sheet. Understandably, the width direction W of workpiece 01 is perpendicular to both its longitudinal direction F and its thickness direction H.

[0106] When workpiece 01 is an electrode, the coating layer 01b of the electrode is its active layer. The active layer contains active materials. When the electrode is a negative electrode, the active materials contained in its active layer can include graphite, soft carbon, hard carbon, silicon suboxide, lithium titanate, lithium metal, etc. When the electrode is a positive electrode, the active materials contained in its active layer can include nickel-cobalt-manganese ternary materials, lithium nickel manganese oxide, lithium nickel oxide, lithium nickel cobalt aluminum oxide, lithium iron phosphate, etc. Typically, binders and other components are also added to the active layer. The binder used in the active layer of the positive electrode can be polyvinylidene fluoride (PVDF), etc., while the binder used in the active layer of the negative electrode can be styrene-butadiene rubber (SBR), polytetrafluoroethylene (PX3FE), waterborne polystyrene acrylate (PAA), etc. In some cases, sodium carboxymethyl cellulose (CMC) can also be added to the active layer of the negative electrode. The functions of each component are common knowledge in the art and will not be elaborated here.

[0107] When workpiece 01 is an electrode, the substrate 01a of the electrode is a conductive structure used for electrical connection with an external circuit, allowing electrons to flow between the coating layer 01b and the external circuit, thereby enabling charging and discharging of the external circuit. Typically, the substrate 01a of the electrode is made of metal, such as copper or aluminum. Of course, the substrate 01a can also be a composite structure formed by polymer and metal materials, as long as it can achieve its conductive function. The specific type of substrate 01a can be determined according to the conventional practices of those skilled in the art. However, when workpiece 01 is not an electrode, whether its substrate 01a needs to have conductive properties is not necessarily required and depends on the actual needs.

[0108] In the preparation of the electrode, the process of forming the active layer (i.e., coating layer 01b) on the substrate 01a is roughly as follows: the active material, solvent, binder and other components are mixed to form a coating slurry, and then the coating slurry is coated on the substrate 01a by casting, coating and other methods. After drying, cold pressing and other treatments, the electrode is obtained.

[0109] The "adhesive floating" mentioned in this application refers to the phenomenon that, during the coating process, due to the influence of slurry characteristics, coating speed, drying rate, etc., the adhesive in the coating layer 01b floats to varying degrees in the thickness direction H of the coating layer 01b, that is, the adhesive migrates from the substrate of the coating layer 01b to the top of the coating layer 01b. When the degree of adhesive floating is large, the substrate of the coating layer 01b cannot effectively bond with the substrate 01a of the workpiece 01, and the coating layer 01b is prone to detach from the substrate 01a, affecting the quality of the workpiece 01. The adhesive floating degree detection method provided in this application is used to detect the degree of adhesive floating in the coating layer 01b of the workpiece 01, so as to obtain the quality status of the workpiece 01 and promptly identify unqualified workpieces 01.

[0110] The calculation of the adhesive float degree is usually performed by measuring the adhesive content S1 of the sample in the upper region q1 and the adhesive content S2 of the sample in the lower region q3 of the coating layer 01b, to obtain the adhesive float degree δ of the coating layer 01b. δ satisfies:

[0111] Figure 3 This is an enlarged schematic diagram of workpiece 01 at point I according to one or more embodiments. Please refer to... Figure 3 In the thickness direction H of the coating layer 01b, the lower region q3 is located between the upper region q1 and the substrate 01a, meaning the upper region q1 is farther from the substrate 01a of the workpiece 01 compared to the lower region q3. Typically, the lower region q3 is the region in direct contact with the substrate 01a, while the upper region q1 is the region in contact with the atmosphere. Regarding the thickness distribution of the upper region q1 and the lower region q3, the thickness of the upper region q1 is H1, and the thickness of the lower region q3 is H2; typically, H1 equals H2.

[0112] In some cases, please refer to Figure 3 In the coating layer 01b, there may also be a middle layer region q2 between the upper layer region q1 and the lower layer region q3. The thickness of the middle layer region q2 is H3. The thickness relationship between H1, H2 and H3 is not limited, as long as the sum of H1, H2 and H3 is equal to the thickness H of the coating layer 01b.

[0113] Figure 4 This is a schematic diagram of the composition of a powder scraping system 1000 according to one or more embodiments. Please refer to... Figure 4 The powder scraping system 1000 provided in this application embodiment includes a powder scraping device 100, a sintering furnace 200, and a balance device 300. The powder scraping device 100 is used to scrape away powder coated on the surface of a workpiece 01 to obtain a sample. The sintering furnace 200 is used to heat-treat the sample. The balance device 300 is used to weigh the sample before and after heat treatment. The powder scraping device 100 is the one provided in this application embodiment, which has high powder scraping accuracy. The sintering furnace 200 is a furnace structure that provides a heating environment; it can be a slide rail furnace, a muffle furnace, etc., and is not specifically limited. The balance device 300 is an instrument for measuring the mass of an object; it can be selected from values ​​such as 1 / 100,000 or 1 / 10,000.

[0114] The scraping powder processing system 1000 of this application is mainly used for heat treatment of scraped samples and weighing them before and after heat treatment. It can be applied to various situations. In some cases, the thermal weight loss content of the sample at the heat treatment temperature can be obtained using the weight of the sample before and after heat treatment, thus determining the content of the component causing the thermal weight loss, such as the content of adhesive in the sample. In some cases, the temperature resistance of the sample can be obtained using the thermal weight loss content of the sample at different heat treatment temperatures. In some cases, the thermal weight loss content of the sample at different thickness positions of the workpiece 01 can also be obtained using the scraper device to determine the distribution of adhesive in the sample.

[0115] Please refer to Figure 4 In some embodiments, the powder scraping system 1000 further includes a processing device 400, which is used to analyze the weighing results from the balance device 300 to obtain measurement results. The processing device 400 is a tool with data processing capabilities, which can be a central processing unit, microprocessor, embedded microcontroller, or other processing components, or it can be an industrial control computer, server, mobile terminal, etc., equipped with such processing components. The specific type of the processing device 400 is not limited here.

[0116] The measurement results obtained by the processing device 400 depend on the usage of the powder scraping system 1000. For example, if the powder scraping system 1000 is used to obtain the binder content in a sample, then the processing device 400 can analyze the binder content in the sample based on the weighing results of the balance device 300. As another example, the processing device 400 can analyze the degree of binder buoyancy in the sample based on the weighing results of the balance device 300. The specific use of the processing device 400 is not limited in this embodiment; it can be designed according to actual needs.

[0117] The powder scraping device 100 provided in the embodiments of this application will be described in detail below.

[0118] Figure 5 This is a three-dimensional structural schematic diagram of the powder scraping device 100 according to one or more embodiments. Figure 6 This is a front view schematic diagram of a powder scraping device 100 according to one or more embodiments. Figure 7 This is a top view of a powder scraping device 100 according to one or more embodiments.

[0119] According to some embodiments of this application, please refer to Figure 5 , Figure 6 and Figure 7The powder scraping device 100 provided in this application embodiment includes a roller body 10 and a scraper device 20. The roller body 10 is rotatably arranged around a preset axis Z, and the roller body 10 has a contact surface m1 arranged around the preset axis Z. The scraper device 20 is located on one circumferential side of the roller body 10.

[0120] The roller body 10 is a cylindrical or cylindrical structure arranged in a rotational position around a rotation axis. Typically, the preset axis Z is the rotation axis of the roller body 10. The roller body 10 can be a plastic roller, a metal roller, etc. Typically, the roller body 10 has a rotating shaft, which is rotatably mounted on a support structure. When the rotating shaft rotates under the action of an external force, the roller body 10 rotates. The preset axis Z is the rotation axis of the rotating shaft. Typically, the powder scraping device 100 is configured with a drive mechanism 11, which is connected to the rotating shaft for driving its rotation. The drive mechanism 11 can be, but is not limited to, a rotary motor, etc. Those skilled in the art can configure the specific structure of the drive mechanism 11 based on conventional settings, and this is not limited here.

[0121] The roller body 10 has a circumferential roller surface surrounding a preset axis Z. The contact surface m1 is formed by at least a portion of the circumferential roller surface of the roller body 10, and therefore the contact surface m1 is also arranged around the preset axis Z. The contact surface m1 is used to contact and set the workpiece 01. The contact surface m1 is flat and has good flatness, which allows the workpiece 01 contacted and set on the contact surface m1 to also maintain good flatness. Generally, the contact surfaces m1 are continuously arranged. When the area of ​​the contact surface m1 is large, the contact surface m1 area with the workpiece 01 is large, which further helps to maintain the flatness of the workpiece 01 contacted with the contact surface m1.

[0122] In use, the workpiece 01 and the mating surface m1 remain in contact, meaning that the two are in contact and the shape of the workpiece 01 matches the shape of the mating surface m1. Typically, at least a portion of one surface of the workpiece 01 in its thickness direction H remains in contact with the mating surface m1. In practical applications, the scraper device 20 primarily performs a scraping operation on the portion of the workpiece 01 that is mated to the mating surface m1. Understandably, when the workpiece 01 is mated to the mating surface m1, the coating layer 01b that needs to be scraped from the workpiece 01 is positioned away from the mating surface m1.

[0123] The scraper device 20 is a device capable of performing a powder scraping operation on the workpiece 01, used to scrape powder off the workpiece 01 that is bonded to the bonding surface m1. Typically, the scraper device 20 includes a blade. When the blade contacts the workpiece 01 and the two move relative to each other, the blade can scrape off a portion of the coating layer 01b from the workpiece 01. The relative movement between the blade and the workpiece 01 is achieved by rotating the roller 10. When the roller 10 rotates, it drives the workpiece 01 to move around a preset axis Z, while the blade remains stationary, and the extension direction of the blade is approximately parallel to the preset axis Z. During the powder scraping operation, the blade and the bonding surface m1 can be arranged intersectingly or tangentially, as long as the coating layer 01b of the workpiece 01 bonded to the bonding surface m1 can be scraped off.

[0124] The scraper device 20 is located on one side of the circumferential direction of the roller body 10, which means that the scraper device 20 is located on one side of a certain symmetrical plane passing through the preset axis Z of the roller body 10. At this time, the scraper device 20 is set opposite to the circumferential roller surface of the mounting tube to perform a powder scraping operation on the workpiece 01 that is attached to the bonding surface m1.

[0125] The aforementioned scraper device 20 uses at least a portion of the circumferential roller surface of the roller body 10 as the bonding surface m1 to lay the workpiece 01. Since the roller body 10 is usually rotatably mounted on other structures via its rotating shaft, there is no need to set fasteners on its circumferential roller surface. There are usually no stress concentration positions on its circumferential roller surface caused by fasteners, and the circumferential roller surface is not easily deformed, that is, the bonding surface m1 is not easily deformed.

[0126] Moreover, when the scraper comes into contact with the bonding surface m1, the surrounding area exerts a greater pulling force on the stressed area. The scraper's force can be evenly transmitted to all parts of the circumferential roller surface. Stress concentration is less likely to occur at the stressed area of ​​the bonding surface m1, and the stress area has a stronger resistance to deformation, making the bonding surface m1 less prone to deformation.

[0127] At this time, because the bonding surface m1 is not easily deformed and has good flatness, the flatness of the workpiece 01 laid on the bonding surface m1 is good. When the scraper device 20 performs the scraping operation, the scraping thickness is relatively consistent, which helps to improve the scraping accuracy of the scraping equipment 100.

[0128] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The powder scraping device 100 also includes a fixing device 30, which is arranged around the roller body 10.

[0129] The fixing device 30 is used to fix the workpiece 01 to the mating surface m1. It applies a force to the workpiece 01 mated to the mating surface m1, maintaining the workpiece 01 in contact with the mating surface m1. The fixing device 30 can be a negative pressure device, for example, by providing negative pressure holes on the non-matting surface m1 of the roller body 10 (the surface of the circumferential roller surface located outside the mating surface m1), using these holes to provide negative pressure to fix the workpiece 01 to the mating surface m1, thereby reducing the risk of the workpiece 01 detaching from the mating surface m1. The fixing device 30 can also be a positive pressure device, for example, by providing nozzles facing the mating surface m1 of the roller body 10, which can blow air towards the workpiece 01 on the mating surface m1 to keep the workpiece 01 fixed to the mating surface m1. The fixing device 30 can also be a pressing device, for example, by using a pressure rod to directly press the workpiece 01 onto the mating surface m1 or the non-matting surface m1. The specific implementation of the fixing device 30 is not limited here.

[0130] The fixing device 30 is arranged around the roller body 10, meaning that the fixing device 30 is located close to the roller body 10. Whether the fixing device 30 is connected to the roller body 10 is not limited.

[0131] At this time, the powder scraping equipment 100 is equipped with a fixing device 30. The fixing device 30 can keep the workpiece 01 and the mating surface m1 in contact, reduce the risk of displacement of the workpiece 01 and the mating surface m1 or even separation of the two, help improve the smoothness of the powder scraping process and help improve the powder scraping accuracy.

[0132] Figure 8 for Figure 5 An enlarged view of the powder scraping device 100 of the illustrated embodiment at point II.

[0133] In some embodiments, see Figure 5 , Figure 6 and Figure 8 The fixing device 30 includes a clamping assembly 31, which is disposed on the roller body 10.

[0134] The clamping assembly 31 is used to clamp the workpiece 01. The clamping assembly 31 can be directly mounted on the roller body 10, or it can be mounted on the roller body 10 through other intermediate structures. In general, the roller body 10 provides support for the clamping assembly 31. Typically, the workpiece 01 is circumferentially attached to the contact surface m1 of the roller body 10, and the first free end d1 and the second free end d2 of the workpiece 01 in its longitudinal direction F are clamped by the clamping assembly 31 so that the workpiece 01 does not detach from the roller body 10 and maintains good contact with the contact surface m1.

[0135] The clamping assembly 31 is a component capable of clamping the free end of the workpiece 01 within itself. In some examples, the clamping assembly 31 may include grippers that can open and close under external force. When open, the grippers allow the free end of the workpiece 01 to pass through them, and when closed, they clamp the free end of the workpiece 01 within themselves. The construction of the clamping assembly 31 is not limited herein, and those skilled in the art can make conventional configurations.

[0136] At this point, the workpiece 01 is fixedly attached to the bonding surface m1 using the clamping assembly 31, and the structure is easy to implement.

[0137] In some embodiments, please continue to refer to Figure 8 The clamping assembly 31 includes a first rod 31a and a second rod 31b. The first rod 31a has a first through-hole portion g1, and the second rod 31b has a second through-hole portion g2. The first rod 31a and the second rod 31b are configured to move relative to each other in a first direction X1 intersecting a preset axis Z, and have a first relative position w1 and a second relative position w2 during the relative movement. When in the first relative position w1, the first through-hole portion g1 and the second through-hole portion g2 are offset in the first direction X1, and when in the second relative position w2, the first through-hole portion g1 and the second through-hole portion g2 are aligned in the first direction X1.

[0138] Typically, the preset axis Z is parallel to the horizontal plane, and the first direction X1 is approximately vertical. The first member 31a and the second member 31b are rod-shaped structures, which can be round, square, etc., and their specific shapes are not limited. Typically, the first member 31a and the second member 31b extend approximately parallel to the preset axis Z.

[0139] The first through-hole g1 and the second through-hole g2 can be through-holes, through-grooves, or other structures that allow the workpiece 01 to pass through from one side to the other. That is, the first through-hole g1 and the second through-hole g2 are used for the workpiece 01 to pass through. Specifically, the workpiece 01 can pass through from one side of the first through-hole g1 / second through-hole g2 to the other side approximately along the circumference of the roller body 10, or it can pass through from one side of the first through-hole g1 / second through-hole g2 to the other side along the first direction X1. The direction of the workpiece 01 passing through each through-hole is not limited in the embodiments of this application.

[0140] Understandably, the workpiece 01, which is attached to the mating surface m1, extends longitudinally in the direction parallel to the preset axis Z. Therefore, the first through part g1 and the second through part g2 should also extend longitudinally in the direction parallel to the preset axis Z, and their extension lengths should meet the requirements of the workpiece 01 through part itself.

[0141] Figure 9This is a schematic diagram showing the relative positions of the first member 31a and the second member 31b according to one or more embodiments. Figure 10 for Figure 9 Cross-sectional view of the structure shown. See also Figure 8 and Figure 10 In the illustrated embodiment, the first through-hole g1 is formed by a notch or groove on the first rod 31a located below or below in the first direction X1, and the second through-hole g2 is formed by a through hole r2 groove on the second rod 31b. In other embodiments, the first through-hole g1 can also be a through hole r2 groove passing through the first rod 31a, and the second through-hole g2 can be formed by a notch or groove on the second rod 31b located above or below in the first direction X1. The specific structure of the first through-hole g1 and the second through-hole g2 is not limited, as long as both can allow the workpiece 01 to pass through.

[0142] Understandably, the first through-hole g1 and the second through-hole g2 are used for the same free end of the workpiece 01 to pass through. One of the first free end d1 and the second free end d2 of the workpiece 01 passes through the first through-hole g1 and the second through-hole g2 of the clamping assembly 31 simultaneously.

[0143] The first member 31a and the second member 31b can move relative to each other in the first direction X1. They can move simultaneously or only one of them can move, as long as they can move relative to each other. The scheme for realizing the relative movement of the first member 31a and the second member 31b in the first direction X1 is something that those skilled in the art can set up based on conventional means, and is not limited here.

[0144] When the first member 31a and the second member 31b move relative to each other, they have a first relative position w1 and a second relative position w2. Figure 11 and Figure 12 The diagram illustrates the positional relationship of the first member 31a and the second member 31b when they are in the first relative position w1 and the second relative position w2, respectively. At the first relative position w1 (see [link to diagram]). Figure 11 The first penetrating part g1 and the second penetrating part g2 are staggered in the first direction X1, meaning that their orthographic projections on a plane parallel to the first direction X1 do not intersect. Similarly, in the second relative position w2 (see [link to relevant documentation]). Figure 12 The first through-hole g1 and the second through-hole g2 are aligned in the first direction X1, meaning that the orthographic projections of the first through-hole g1 and the second through-hole g2 onto a plane parallel to the first direction X1 intersect.

[0145] When the first member 31a and the second member 31b are in the first relative position w1, due to the misalignment of the first through part g1 and the second through part g2, the combination... Figure 11Therefore, the free end of the workpiece 01, through the first through part g1 and the second through part g2, is not easily detached from the first rod 31a and the second rod 31b, so the first rod 31a and the second rod 31b can jointly clamp the workpiece 01. When the first rod 31a and the second rod 31b are in the second relative position w2, combined with Figure 12 Since the first through part g1 and the second through part g2 are aligned, the free end of the workpiece 01 can easily and quickly pass through the first through part g1 and the second through part g2, and the free end of the workpiece 01 can also easily detach from the first through part g1 and the second through part g2. This makes it convenient for the workpiece 01 to be clamped on the first rod 31a and the second rod 31b or to be easily removed from the first rod 31a and the second rod 31b.

[0146] At this time, through the first through part g1 of the first rod 31a and the second through part g2 of the second rod 31b, combined with the relative movement of the first rod 31a and the second rod 31b, the clamping assembly 31 clamps and releases the workpiece 01. The structure is simple and easy to implement.

[0147] In some embodiments, the first rod 31a and the second rod 31b both extend along a second direction X2 parallel to the preset axis Z, and the first through portion g1 and the second through portion g2 both extend along the second direction X2.

[0148] The extension directions of the first rod 31a and the second rod 31b are their respective longitudinal directions F, and the extension directions of the first through part g1 and the second through part g2 correspond to the width direction W of the through workpiece 01.

[0149] When the extension directions of the first rod 31a, the second rod 31b, the first through part g1, and the second through part g2 are all parallel to the preset axis Z, the width direction W of the workpiece 01 can basically remain parallel to the preset axis Z when the workpiece 01 passes through the first through part g1 and the second through part g2. The possibility of the workpiece 01 being twisted relative to the contact surface m1 by the first rod 31a and the second rod 31b is lower, and the contact effect between the workpiece 01 and the contact surface m1 is better. This helps to improve the flatness of the workpiece 01 in contact with the contact surface m1, thereby improving the powder scraping accuracy of the powder scraping device 100.

[0150] In some embodiments, please refer to Figure 9 and Figure 10 The first member 31a has a receiving space K inside, and the receiving space K is connected to the first through part g1. The second member 31b is located in the receiving space K.

[0151] Typically, the accommodating space K is arranged to pass through the first member 31a approximately along the first direction X1, and the second member 31b is located within the accommodating space K. When the first member 31a and the second member 31b move relative to each other, the second member 31b can move within the accommodating space K or enter and exit the accommodating space K.

[0152] It should be noted that the position of the second rod 31b within the receiving space K is changeable. During the process of switching between the first relative position w1 and the second relative position w2, the second rod 31b has a position where it is completely located in the receiving space K. When the second rod 31b is located in the first relative position w1 or the second relative position w2, the second rod 31b can be partially contained in the receiving space K.

[0153] At this point, the second rod 31b is placed inside the first rod 31a. The space occupied by the second rod 31b and the first rod 31a is small, making the structure of the clamping assembly 31 more compact. Simultaneously, with the second rod 31b inside the first rod 31a, the workpiece 01 can be clamped reliably using the staggered first through-hole g1 and second through-hole g2.

[0154] Understandably, the dimensions of the first through portion g1 of the first rod 31a and the second through portion g2 of the second rod 31b should be designed to ensure that the workpiece 01 can be clamped in the second relative position w2, and that the workpiece 01 is not easily dislodged. In other embodiments, to increase the clamping reliability of the first rod 31a and the second rod 31b, a corresponding reinforcing structure can be provided on the first rod 31a or the second rod 31b to tightly press the workpiece 01 onto the first rod 31a or the second rod 31b. Specifically, the reinforcing structure can be an elastic pressure plate, one end of which can be fixed to the first rod 31a or the second rod 31b, and the other end can freely extend and retract and cooperate with the first rod 31a or the second rod 31b to press the workpiece 01 onto the first rod 31a or the second rod 31b.

[0155] In some embodiments, see Figure 8 The clamping assembly 31 also includes a transmission rod 31c, which is located in the receiving space K. The transmission rod 31c is fixedly connected to the second rod 31b and is configured to be movably disposed relative to the first rod 31a in the first direction X1.

[0156] The transmission rod 31c is roughly rod-shaped and mainly serves to mount the second rod and drive the second rod 31b to move relative to the first rod 31a. The transmission rod 31c and the second rod 31b can be fixed by fastening, welding, snap-fitting, etc., and are not limited to any particular method. Typically, when the transmission rod 31c moves relative to the roller 10 in the first direction X1, the first rod 31a remains stationary relative to the roller 10, thus allowing relative movement between the first rod 31a and the second rod 31b.

[0157] As an example, the way to realize the movement of the transmission rod 31c relative to the roller body 10 may include, but is not limited to, setting a telescopic cylinder on the axial end of the roller body 10, with the drive end of the telescopic cylinder connected to the transmission rod 31c, and driving the transmission rod 31c to move relative to the roller body 10 in the first direction X1 when the telescopic cylinder extends or retracts.

[0158] At this time, the second rod 31b moves relative to the first rod 31a by the transmission rod 31c set in the accommodating space K, and the structure of the clamping assembly 31 becomes more compact.

[0159] In some embodiments, please refer to Figure 8 and combined Figure 6 The clamping assembly 31 also includes a handle 31d, which is connected to the drive rod 31c and configured to be operably movable relative to the first rod 31a to drive the drive rod 31c to move in the first direction X1.

[0160] The handle 31d is a component for the user to grip, mainly used for user operation to drive the transmission rod 31c to move in the first direction X1. The handle 31d can move relative to the first rod 31a. Specifically, the handle 31d can move relative to the first rod 31a in the first direction X1, or it can move in a direction intersecting the first direction X1. The specific movement of the handle 31d is not limited, as long as it has displacement in the first direction X1 during movement.

[0161] At this point, the handle 31d is designed to allow users to manually operate the transmission rod 31c to move, which can reduce the configuration cost of the equipment.

[0162] In some embodiments, please refer to Figure 8 The handle 31d is rotatably connected to the transmission rod 31c and has an abutment position J that abuts against the first rod 31a. The handle 31d is configured to rotate about the abutment position J to drive the transmission rod 31c to move in the first direction X1.

[0163] The abutment position J of the handle 31d is the position in contact with the first rod 31a. The handle 31d and the transmission rod 31c are rotatably configured, and their rotation centers are eccentrically set relative to the abutment position J. Figure 13A schematic diagram is given showing how the handle 31d drives the transmission rod 31c to move in the first direction X1 when it rotates. Combined with... Figure 13 Since the handle 31d is rotatably connected to the transmission rod 31c, and the rotation center of the two is eccentrically set relative to the abutment position J, when the user operates the handle 31d to rotate around the abutment position J, the rotation center of the handle 31d and the transmission rod 31c rotates around the abutment position J. The rotating handle 31d can drive the transmission rod 31c to move relative to the first rod in the first direction X1.

[0164] Specifically, taking the first direction X1 as the vertical direction as an example, combined with... Figure 13 When the user lifts the handle 31d upwards, the handle 31d rotates clockwise, the transmission rod 31c moves downwards, the second rod 31b moves downwards, and the second through part g2 is aligned with the first through part g1 (e.g., Figure 12 At this time, workpiece 01 can be installed on the first rod 31a and the second rod 31b. When the user operates the lifting mechanism and presses it down, the handle 31d rotates counterclockwise, the transmission rod 31c moves upward, the second rod 31b moves upward, and the second through part g2 is offset from the first through part g1 (e.g., Figure 11 At this time, the workpiece 01, which is inserted into the first insertion part g1 and the second insertion part g2, can be clamped by the first rod 31a and the second rod 31b.

[0165] At this time, the rotating handle 31d drives the transmission rod 31c to move. When operating the handle 31d, the user can operate with the abutment position J as the fulcrum, making the operation more effortless.

[0166] Figure 14 This is a partial structural schematic diagram of the clamping assembly 31 according to one or more embodiments.

[0167] In some embodiments, please refer to Figure 14 The clamping assembly 31 also includes an elastic element 31f, which is elastically connected between the first rod 31a and the second rod 31b along the first direction X1. The elastic element 31f is used to prevent the first rod 31a and the second rod 31b from moving away from the first relative position w1.

[0168] The elastic element 31f can be directly connected between the first rod 31a and the second rod 31b, or it can be connected between the first rod 31a and the second rod 31b through the transmission rod 31c or other structures, as long as the elastic element 31f can allow the first rod 31a and the second rod 31b to be relative to each other in the first direction X1.

[0169] exist Figure 14In the illustrated embodiment, a mounting boss is provided inside the first rod 31a, and the mounting boss of the elastic member 31f is provided in the first rod 31a. The second rod 31b and the transmission rod 31c ( Figure 14 (Not shown in the image) Fixed connection, the elastic element 31f can be directly connected to the transmission rod 31c.

[0170] The elastic element 31f is a component capable of elastic deformation in the first direction X1. It can be a spring, a rubber body, a silicone body, a metal sheet, etc., and is not specifically limited. Typically, the two ends of the elastic element 31f in the first direction X1 are fixedly connected to the structure to which it is connected, such as by welding. Figure 14 In the embodiment shown, one end of the elastic element 31f can be welded to the transmission rod 31c, and the other end can be welded to the mounting boss.

[0171] In its initial state (meaning before elastic deformation), the elastic member 31f has the first rod 31a and the second rod 31b positioned at the first relative position w1. At this time, the first through-hole g1 and the second through-hole g2 are staggered, enabling the first rod 31a and the second rod 31b to clamp the workpiece 01. When the transmission rod 31c moves downwards to move the first rod 31a and the second rod 31b towards the second relative position w2, the elastic member 31f undergoes elastic deformation under the action of the transmission rod 31c, exhibiting a tendency to pull the transmission rod 31c in the opposite direction, thus preventing the first rod 31a and the second rod 31b from leaving the first relative position w1.

[0172] At this time, under the action of the elastic element 31f, it helps to maintain the positional stability of the first rod 31a and the second rod 31b in the first relative position w1, and helps to enhance the clamping effect of the first rod 31a and the second rod 31b on the workpiece 01.

[0173] In a further embodiment, to prevent the elastic element 31f from pulling the first rod 31a and the second rod 31b away from the second relative position w2, thus facilitating the installation of the workpiece 01, the clamping assembly 31 may further include a limiting structure. This limiting structure restricts the first rod 31a and the second rod 31b from being located at the second relative position w2. The limiting structure may be a limiting pin, with corresponding limiting holes provided on the first rod 31a and the second rod 31b. When the first rod 31a and the second rod 31b are located at the second relative position w2, their limiting holes are aligned, and the limiting pin can be inserted into the two limiting holes, thereby maintaining the second rod 31b and the first rod 31a at the second relative position w2. When it is necessary to clamp the workpiece 01, the limiting pin can be removed. Of course, the specific configuration of the limiting structure is not limited in this embodiment; those skilled in the art can make conventional configurations.

[0174] In some embodiments, please refer to Figure 6and Figure 8 The fixing device 30 also includes a moving component 32, which is disposed on the roller body 10 and connected to the clamping component 31, and is used to drive the clamping component 31 to move in the first direction X1.

[0175] The movable component 32 can drive the clamping component 31 to move in the first direction X1. The movable component 32 can be a telescopic cylinder assembly, a timing belt assembly, a gear and rack assembly, etc., as long as it can output a driving force to drive the clamping component 31 to move in the first direction X1. The specific structure of the movable component 32 is not limited in the embodiments of this application.

[0176] Specifically, when the second rod 31b is mounted on the transmission rod 31c and the transmission rod 31c is movably mounted on the first rod 31a, the first rod 31a serves as a support structure for the clamping assembly 31, and the moving assembly 32 can connect to the first rod 31a and drive the first rod 31a to move in the first direction X1.

[0177] It should be noted that when the clamping assembly 31 moves in the first direction X1, it can switch between the mounting position b1 and the fixed position b2, and the mounting position b1 intersects with the fixed position b2 and is set away from the preset axis Z in the first direction X1. When it is in the mounting position b1, the clamping assembly 31 can allow the workpiece 01 to be mounted on itself, and when it is in the fixed position b2, the clamping assembly 31 can keep the clamped workpiece 01 in contact with the contact surface m1.

[0178] When the first direction X1 is vertical, the installation position b1 is located above the fixed position b2, and the installation position b1 is further away from the preset axis Z than the fixed position b2. When the clamping assembly 31 is located at the installation position b1, there is a larger space between the clamping assembly 31 and the mating surface m1 to install the workpiece 01. When the clamping assembly 31 is located at the fixed position b2, the clamping assembly 31 is closer to the preset axis Z, which can pull the workpiece 01 closer to the preset axis Z. The closer the workpiece 01 is to the preset axis Z, the easier it is for the workpiece 01 to fit tightly against the mating surface m1.

[0179] At this time, the moving component 32 drives the clamping component 31 to move in the first direction X1, which not only makes it easier to install the workpiece 01, but also makes the workpiece 01 fit more tightly with the mating surface m1.

[0180] Figure 15 This is a schematic diagram of the structure of the roller body 10 according to one or more embodiments. Figure 16 This is a schematic diagram of the clamping assembly 31 located at the mounting position b1 according to one or more embodiments. Figure 17 This is a schematic diagram of the clamping assembly 31 in fixed position b2 according to one or more embodiments.

[0181] In some embodiments, please refer to Figure 15 The roller body 10 also has a clearance surface m2, which is arranged adjacent to the contact surface m1 along the circumference of the roller body 10. The clearance surface m2 is recessed relative to the contact surface m1 toward the preset axis Z and forms an opening groove C. The opening groove C is arranged through in a direction parallel to the preset axis Z. The opening groove C is located on the moving path of the clamping assembly 31.

[0182] The clearance surface m2 is a circumferential part of the circumferential roller surface of the roller body 10, and the other circumferential part of the circumferential roller surface of the roller body 10 forms the contact surface m1. That is to say, the clearance surface m2 and the contact surface m1 together constitute the circumferential roller surface.

[0183] The clearance surface m2 is recessed relative to the contact surface m1 toward the preset axis Z, forming an opening groove C. The opening groove C is disposed through the axial end face of the roller body 10 along the preset axis Z. Typically, the moving component 32 is located on one or both sides of the axial direction of the roller body 10. It can be understood that the clamping component 31 is capable of clamping the workpiece 01, and at least a portion of the clamping component 31 is located in the extending direction of the workpiece 01, thereby at least a portion of the clamping component 31 is located in the opening groove C or can enter and exit the opening groove C.

[0184] The opening slot C is located on the movement path of the clamping assembly 31 from the installation position b1 to the fixed position b2. Since the fixed position b2 is set close to the preset axis Z, that is, when it is in the fixed position b2, the clamping assembly 31 is at least partially located in the opening slot C.

[0185] Combination Figure 16 When the clamping assembly 31 is in the mounting position b1, at least a portion of the clamping assembly 31 (in) Figure 16 The main feature is that the first rod 31a and the second rod 31b can be located outside the opening slot C to facilitate the installation of the workpiece 01 onto the clamping assembly 31. Combined with... Figure 17 When the clamping component 31 is in the fixed position b2, at least a part of the clamping component 31 can be located in the slot, so as to drive the clamped workpiece 01 to extend toward the opening slot C, thereby pulling the workpiece 01 to fit more tightly on the mating surface m1.

[0186] At this time, the circumferential roller surface of the roller body 10 serves as a clearance surface m2 and forms an open groove C. This not only allows the clamping assembly 31 to be cleared, providing more space for the installation of the workpiece 01, but also pulls the free end of the workpiece 01 closer to the preset axis Z, making the workpiece 01 fit more tightly against the contact surface m1, which helps to improve the scraping accuracy of the scraping equipment 100.

[0187] In a further embodiment, please refer to Figure 15The inner wall of the opening groove C is recessed to form a transition groove p. Moving components 32 are provided at both ends of the roller body 10 along its axial direction. The first connecting rods 32a of the two opposing moving components 32 are connected via a connecting shaft (not shown), which is rotatably disposed within the transition groove p. The first connecting rods 32a of the two opposing moving components 32 jointly support the first rod 31a of the same clamping component 31. When one of the first connecting rods 32a rotates, it can drive the other first connecting rod 32a to rotate via the connecting shaft. This improves the synchronicity of the movement of the two ends of the same first rod 31a connected to the first connecting rod 32a along the axial direction of the roller body 10, making the clamping component 31 work more smoothly.

[0188] In some embodiments, please refer to Figure 6 and Figure 8 The moving component 32 includes a first connecting rod 32a, a second connecting rod 32b, and an intermediate connecting rod 32c. One end of the first connecting rod 32a and the second connecting rod 32b are spaced apart and both are rotatably mounted on the roller body 10 about a direction parallel to a preset axis. The clamping component 31 is mounted on the first connecting rod 32a. One end of the intermediate connecting rod 32c is rotatably mounted on the other end of the first connecting rod 32a, and the other end of the intermediate connecting rod 32c is connected to the other end of the second connecting rod 32b.

[0189] The first connecting rod 32a, the second connecting rod 32b, and the intermediate connecting rod 32c are all rod-shaped structures, specifically round rods, square rods, etc., without limitation. The first connecting rod 32a and the second connecting rod 32b are rotatably mounted on the same axial end face of the roller body 10, and the rotation axes of both are parallel to the preset axis Z. The first connecting rod 32a and the second connecting rod 32b are spaced apart, that is, their rotation axes do not coincide.

[0190] The clamping assembly 31 can be fixedly mounted on the first connecting rod 32a. Specifically, the first rod 31a can be fixedly mounted on the first connecting rod 32a. The clamping assembly 31 can also be rotatably connected to the first connecting rod 32a. During the rotation of the first connecting rod 32a, the clamping assembly 31 can remain stationary relative to the rotation axis of the first connecting rod 32a.

[0191] In actual operation, combined with Figure 6 The following explanation will be based on the example of the movable component 32 on the left side of the diagram. Figure 6When the user operates the second link 32b to rotate counterclockwise, the second link 32b drives the middle link 32c to move upward, and the middle link 32c drives the first link 32a to rotate counterclockwise, thereby causing the first link 31a to move upward. Conversely, when the user operates the second link 32b to rotate clockwise, the second link 32b drives the middle link 32c to move downward, and the middle link 32c drives the first link 32a to rotate clockwise, thereby causing the first link 31a to move downward. This achieves the movement of the clamping assembly 31 in the first direction X1.

[0192] At this time, the user can operate the second link 32b to move the clamping assembly 31 in the first direction X1, which is compact and easy to implement.

[0193] In a further embodiment, in order to fix the clamping assembly 31 in the mounting position b1 and the fixed position b2, the second link 32b has two extreme positions during rotation, and a braking structure is provided for each extreme position to restrict the rotation of the second link 32b. The braking structure can be a brake pin, a brake groove, etc. The specific construction of the braking structure is not limited in this embodiment.

[0194] In some embodiments, please refer to Figure 6 and Figure 8 One of the other ends of the intermediate connecting rod 32c and the other end of the second connecting rod 32b has a connector h1, and the other has an arc-shaped connecting portion h2. The connector h1 is fixedly disposed on the arc-shaped connecting portion h2, and its position is adjustable in the extending direction of the arc-shaped connecting portion h2. The central axis of the arc-shaped connecting portion h2 is aligned with the rotation axis of the second connecting rod 32b.

[0195] The connector h1 is rotatably disposed within the arc-shaped connecting portion h2. Specifically, the connector h1 can be connected with a bolt, and the connector h1 and the arc-shaped connecting portion h2 can rotate relative to each other. The extension direction of the arc-shaped connecting portion h2 corresponds to its arc-shaped direction. The arc-shaped connecting portion h2 can be an arc groove or an arc hole, and is not specifically limited.

[0196] The adjustable position of connector h1 along the extension direction of the arc-shaped connecting part h2 means that the connection position of connector h1 along the extension direction of the arc-shaped connecting part h2 can be changed by user operation. Specifically, this can be achieved, but is not limited to, by having connector h1 as a connecting pin, and multiple connecting slots arranged at intervals inside the arc-shaped connecting part h2, with the connecting pin selectively installed in one of these slots.

[0197] Taking the example of the intermediate connecting rod 32c having an arc-shaped connecting part h2 at one end and the second connecting rod 32b having a transition shaft at the other end, the explanation is as follows: By changing the position of the connecting piece h1 on the arc-shaped connecting part h2, the distance between the clamping assembly 31 and the preset axis Z in the fixed state can be changed. The closer the clamping assembly 31 is to the preset axis Z, the better the clamping assembly 31 will be able to make the workpiece 01 fit tightly against the mating surface m1. Thus, the tightness of the workpiece 01 can be adjusted according to the actual situation.

[0198] In some embodiments, the fixing device 30 includes two sets of clamping assemblies 31, which are arranged at intervals in the circumferential direction of the roller body 10.

[0199] Typically, the workpiece 01, which is attached to the bonding surface m1, has a first free end d1 and a second free end d2, which are arranged opposite each other in the circumferential direction of the roller body 10. Two sets of clamping assemblies 31 are used to clamp the first free end d1 and the second free end d2, respectively.

[0200] Please combine Figure 16 and Figure 17 When actually installing workpiece 01, the area between the first free end d1 and the second free end d2 of workpiece 01 is first initially attached to the mating surface m1. Then, the two sets of clamping components 31 are operated to move away from the opening slot C and clamp the first free end d1 and the second free end d2 respectively. Then, the clamping components 31 are operated to move towards the opening slot C and pull the first free end d1 and the second free end d2 into the opening slot C respectively, so that workpiece 01 is pulled tight and closely attached to the mating surface m1.

[0201] In this way, by using two sets of clamping components 31 to clamp the first free end d1 and the second free end d2 respectively, the workpiece 01 can be tightly attached to the mating surface m1.

[0202] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The scraper device 20 includes a blade holder 22 and a blade base 21. The blade holder 22 is disposed on the blade base 21, and the blade base 21 is movable relative to the roller body 10 along a third direction X3 intersecting the preset axis Z.

[0203] The tool holder 22 is a structure for mounting cutting tools. Typically, the tool holder 22 is provided with a slot in which the cutting tool is mounted, facilitating tool replacement. Understandably, the extension direction of the slot on the tool holder 22 is approximately parallel to the preset axis Z. That is, the cutting edge of the cutting tool (i.e., the tip portion that directly contacts the workpiece 01) mounted in the slot is approximately parallel to the preset axis Z.

[0204] The tool holder 21 is a base for supporting the tool post 22. The tool post 22 can be integrally mounted on the tool holder 21, or the two can be separate components; the specific configuration is not limited. Typically, the tool holder 21 is made of metal. Optionally, the tool holder 21 can be hollow to reduce weight and material consumption.

[0205] The cutter holder 21 can move relative to the roller body 10 along the third direction X3. Normally, the preset axis Z is located in the horizontal plane, and the third direction X3 is also located in the horizontal plane. Normally, the third direction X3 is set perpendicular to the preset axis Z.

[0206] There are various ways to move the tool holder 21 relative to the roller 10 along a third direction X3, and those skilled in the art can make conventional settings, which are not limited here. As an example, both the tool holder 21 and the roller 10 are supported on a platform, with the tool holder 21 sliding along a slide rail on the platform and the roller 10 supported on the platform. The tool holder 21 can slide along the slide rail manually or under the drive of an external drive mechanism 11 such as a stepper motor.

[0207] At this time, the distance between the scraper device 20 and the roller body 10 can be changed by moving the blade holder 21, which not only facilitates the replacement and installation of the blade, but also provides operating space for the workpiece 01 to be installed on the roller body 10.

[0208] In some embodiments, continue to refer to Figure 5 and Figure 6 The scraper assembly 20 also includes an adjustment component 23 connected between the blade holder 22 and the blade base 21. The adjustment component 23 is configured to adjust the position of the blade holder 22 relative to the blade base 21 in a fourth direction X4 intersecting the third direction X3.

[0209] Combination Figure 5 and Figure 6 The tool holder 22 and the tool support 21 are set at an angle. Normally, the tool holder 22 is positioned towards the contact surface m1 of the roller body 10. When the blade is mounted on the tool holder 22, the blade can be set at an angle to the contact surface m1. The fourth direction X4 is the direction pointing towards the contact surface m1 and set at an angle to the third direction X3.

[0210] The adjusting component 23 can change the position of the tool holder 22 in the fourth direction X4. Specifically, the adjusting component 23 can be a piston rod, and the tool holder 22 is mounted on the tool support 21 via the piston rod. Of course, to improve the stability of the tool holder 22, the tool support 21 can also be a guide rail, and the tool holder 22 is movably mounted on the guide rail along the fourth direction X4. When the piston rod extends or retracts, it drives the tool holder 22 to move in the fourth direction X4, thereby changing the feed rate of the cutting tool on the tool holder 22. The specific construction of the adjusting component 23 is not limited in this embodiment, and those skilled in the art can make conventional settings.

[0211] At this time, the position of the blade holder 22 in the fourth direction X4 can be changed by adjusting component 23, thereby changing the feed rate of the blade on the blade holder 22, which makes it convenient for users to adjust the feed rate according to their needs, and the versatility of the powder scraping device is better.

[0212] In some embodiments, continue to refer to Figure 5 and Figure 6 The adjusting assembly 23 includes an adjusting threaded component 23a, which is fixedly connected to the tool holder 22 and the tool support 21. The adjusting threaded component 23a extends along a fourth direction X4. The relative positions of the tool holder 22 and the tool support 21 in the extending direction of the adjusting threaded component 23a are adjustable.

[0213] The adjusting threaded component 23a can be a bolt, screw, or other component with external or internal threads. Correspondingly, the tool holder 22 or tool support 21 also has a threaded structure that matches the thread of the adjusting threaded component 23a. Typically, the adjusting threaded component 23a is an externally threaded component, while the tool holder 22 and tool support 21 have internally threaded structures, with the externally threaded component threaded onto the internally threaded structure. In actual operation, the relative position of the tool holder 22 and tool support 21 can be changed by rotating the adjusting threaded component 23a.

[0214] At this point, the relative positions of the tool holder 22 and the tool support 21 can be adjusted by adjusting the threaded part 23a, which is simple and reliable.

[0215] In some embodiments, please refer to Figure 6 The powder scraping device 100 also includes a receiving box 40, which is configured to be located on the same side of the roller body 10 as the scraper device 20.

[0216] The receiving box 40 is a container with storage space, generally box-shaped, but its specific shape is not limited. It is used to collect samples scraped off the workpiece 01 located on the contact surface m1 by the scraper device 20. The receiving box 40 and the scraper device 20 are located on the same circumferential side of the roller body 10. Understandably, the receiving box 40 is located below the contact position between the scraper device 20 and the workpiece 01 to collect the scraped samples.

[0217] At this point, the receiving box 40 can be used to collect the scraped-off sample, which facilitates sample collection and keeps the equipment clean.

[0218] In some embodiments, please refer to Figure 5 and Figure 6 The powder scraping device 100 also includes a receiving platform 50, which is located on the same side of the roller body 10 as the scraper device 20, and the receiving box 40 is supported on the receiving platform 40.

[0219] The receiving platform 50 is the base structure supporting the receiving box 40, and typically has a receiving surface to stably support the receiving box 40. The receiving platform 50 and the scraper device 20 are located on the same circumferential side of the roller body 10. Understandably, the receiving platform 50 is located below the contact position between the scraper device 20 and the workpiece 01, so that the supported receiving box 40 can collect the scraped sample.

[0220] Typically, the receiving platform 50 is fixed relative to the rotating roller, resulting in a simple structure. Optionally, the receiving platform 50 can be raised and lowered in the first direction X1, allowing the receiving box 40 to move closer to or further away from the position where the scraper device 20 contacts the workpiece 01, thus flexibly receiving materials and facilitating the placement of the receiving box 40.

[0221] The receiving platform 50 allows the receiving box 40 to be closer to the position where the scraper device 20 contacts the workpiece 01, and the receiving box 40 can collect samples better.

[0222] In some embodiments, please refer to Figure 6 The receiving platform 50 has a weighing sensor 60, and the receiving box 40 bears the weight of the weighing sensor 60.

[0223] The load cell 60 is a sensor capable of acquiring the weight of an object pressed against it. As a conventional component in this field, its specific type is not limited. Specifically, when the receiving box 40 is placed on the receiving platform 50, the weight is borne by the load cell 60.

[0224] At this time, a weighing sensor 60 is installed on the receiving platform 50 to weigh the sample, which makes it convenient for users to monitor the content of the scraped sample.

[0225] In some embodiments, please refer to Figure 6 The powder scraping device 100 also includes a vision inspection device 70, which is fixedly disposed relative to the roller body 10.

[0226] The visual inspection device 70 is a device that acquires an image of a target object and processes and analyzes the acquired image based on image processing and image analysis techniques to obtain the target result. Specifically, the visual inspection device 70 can be used to measure the distance between the blade of the scraper device 20 and the workpiece 01 that is attached to the bonding surface m1.

[0227] Typically, the vision inspection device 70 includes a camera and a processor. The camera is used to acquire images, and the processor is communicatively connected to the camera and can process and analyze the images acquired by the camera. In some examples, the camera can acquire an image containing a blade and a workpiece 01 attached to a mating surface m1. The processor analyzes the distance between the blade and the workpiece 01 based on the image, thereby allowing the user to adjust the blade feed rate according to this distance. The camera and processor are conventional components in the field of vision inspection, and their specific types are not limited here.

[0228] At this time, by measuring the distance between the blade and the workpiece 01 through the vision inspection device 70, the position status of the blade and the workpiece 01 can be easily monitored, which can help adjust the feed rate of the blade.

[0229] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The powder scraping device 100 also includes a feed plate 80, which is located on the opposite side of the roller body 10 along with the scraper device 20.

[0230] The feed plate 80 is used to receive the workpiece 01. The feed plate 80 is generally thin and plate-shaped. Specifically, the feed plate 80 can be supported on the support frame 91. At this time, the workpiece 01 to be scraped can be placed on the feed plate 80 for convenient subsequent scraping.

[0231] In some embodiments, please refer to Figure 5 , Figure 6 and Figure 7 The powder scraping device 100 also includes a frame 90, with the roller body 10 and the scraper device 20 all mounted on the frame 90.

[0232] The frame 90 serves as the frame structure of the powder scraping equipment 100 and is mainly used to install all other structures of the powder scraping equipment 100. In addition to the roller body 10 and the scraper device 20, it can also install the receiving platform 50, the feed plate 80, etc.

[0233] At this point, the entire structure of the powder scraping device 100 is integrated using the frame 90, which facilitates the transportation and use of the powder scraping device 100.

[0234] In one embodiment of this application, the powder scraping device 100 includes a roller body 10, a scraper device 20, and a fixing device 30. The roller body 10 is rotatably arranged around a preset axis Z, and the roller body 10 has a bonding surface m1 arranged around the preset axis Z. The bonding surface m1 is used to bond and set the workpiece 01. The scraper device 20 is located on one circumferential side of the roller body 10 and is used to perform a powder scraping operation on the workpiece 01 bonded to the bonding surface m1.

[0235] The fixing device 30 includes a clamping assembly 31 and a moving assembly 32. The clamping assembly 31 includes a first rod 31a, a second rod 31b, a transmission rod 31c, and a handle 31d. The first rod 31a has a first through-hole g1 and a receiving space K. The second rod 31b has a second through-hole g2. The first through-hole g1 and the second through-hole g2 are used for the workpiece 01 to pass through. The second rod 31b and the transmission rod 31c are both located in the receiving space K, and the second rod 31b is disposed on the transmission rod 31c. The transmission rod 31c is movable relative to the first rod 31a in a first direction X1. The handle 31d is connected to the transmission rod 31c. During the movement of the transmission rod 31c, the first rod 31a and the second rod 31b have a first relative position w1 and a second relative position w2. When in the first relative position w1, the first through part g1 and the second through part g2 are offset in the first direction X1. When in the second relative position w2, the first through part g1 and the second through part g2 are aligned in the first direction X1.

[0236] The moving assembly 32 includes a first connecting rod 32a, a second connecting rod 32b, and an intermediate connecting rod 32c. One end of the first connecting rod 32a and the second connecting rod 32b are spaced apart and rotatably mounted on the roller body 10 about a direction parallel to a preset axial direction. A clamping assembly 31 is mounted on the first connecting rod 32a. One end of the intermediate connecting rod 32c is rotatably mounted on the other end of the first connecting rod 32a, and the other end of the intermediate connecting rod 32c is connected to the other end of the second connecting rod 32b. When the moving assembly 32 drives the first rod 31a to move in the first direction X1 via the intermediate connecting rod 32c, the clamping assembly 31 switches between an installation position b1 and a fixed position b2. The roller body 10 has an opening groove C. When the clamping assembly 31 is in the fixed position b2, it can pull the workpiece 01 close into the opening groove C.

[0237] Additionally, this application also provides a powder scraping system 1000. Please refer to... Figure 4 The powder scraping system 1000 provided in this application includes a sintering furnace 200, a balance device 300, and the powder scraping device 100 in any of the above embodiments.

[0238] For details regarding the sintering furnace 200 and the balance device 300, please refer to the above description; they will not be repeated here.

[0239] Specifically, the powder scraping device 100 is used to perform a powder scraping operation on the workpiece 01 to obtain a sample, the sintering furnace 200 is used to heat treat the sample, and the balance device 300 is used to weigh the sample before and after heat treatment. The processing procedure of the powder scraping system 1000 is roughly as follows: first, the powder scraping device 100 scrapes the sample off the workpiece 01 to obtain a sample; then, the sintering furnace 200 heat-treats the sample; finally, the balance device 300 weighs the sample before and after heat treatment. Based on the weight of the sample before and after heat treatment, the content of substances that have lost weight due to heat in the sample can be obtained, along with other test results. These test results can be obtained manually or by the processing device 400 described below.

[0240] Because the powder scraping system 1000 has the aforementioned powder scraping device, its test results for workpiece 01 are relatively accurate.

[0241] Figure 18 This is a schematic diagram of the internal structure of a sintering furnace 200 according to one or more embodiments.

[0242] In some embodiments, please refer to Figure 18 The sintering furnace 200 is equipped with a sample boat 210, which includes multiple sample placement areas Q, and each sample placement area Q can hold at least one crucible 220.

[0243] Typically, a sample boat 210 is installed inside the furnace cavity of the sintering furnace 200. The sample boat 210 is a container for placing samples. The sample boat 210 has multiple sample placement areas Q. Specifically, the sample boat 210 can be formed by multiple support plates spaced apart to form layers of sample placement areas Q. Understandably, the space contained in each layer of sample placement area Q is connected to the internal space of the furnace cavity of the sintering furnace 200.

[0244] Each sample placement area Q can hold one or more crucibles 220, which are used to hold samples. The crucibles 220 are high-temperature resistant containers, typically made of ceramic, and are commonly used components in the sintering field; the specific material is not limited in this embodiment. The more crucibles 220 in each sample placement area Q, the more samples can be processed simultaneously, resulting in higher processing efficiency for the powder scraping system 1000.

[0245] At this time, the sample boat 210 in the sintering furnace 200 has multiple sample placement areas Q, which can process a large number of samples at the same time, which helps to improve the processing efficiency of the powder scraping system 1000. Moreover, when processing the same multiple samples at the same time, the test results obtained based on the heat treatment results of the same multiple samples are more accurate and reliable.

[0246] Figure 19 This is a schematic diagram of the structure of crucible 220 according to one or more embodiments.

[0247] In some embodiments, please refer to Figure 19 The crucible 220 includes a crucible body 221 and a crucible lid 222. The crucible body 221 has an opening r1, and the crucible lid 222 covers the opening r1. The crucible lid 222 is provided with a through hole r2 that connects the inside and outside of the crucible body 221.

[0248] The body 221 and the lid 222 are usually made of the same ceramic material, but the specific materials are not limited.

[0249] At this time, a through hole r2 is provided on the lid 222. During the heat treatment process, the volatile substances of the sample can flow out of the lid 221 through the through hole r2, which ensures both complete pyrolysis and full release of reaction products, thus ensuring the reliability of the treatment process and the reliability of the subsequent detection structure.

[0250] In some embodiments, the balance device 300 includes an electronic balance with an accuracy of one part per hundred thousand. An electronic balance with an accuracy of one part per hundred thousand means that the smallest division value of the electronic balance is 0.0001g. When the accuracy of the electronic balance reaches one part per hundred thousand, the weighing accuracy of the electronic balance is high, which helps to improve the accuracy of subsequent structural testing.

[0251] In some embodiments, please refer to Figure 4 The powder scraping system 1000 also includes a processing device 400. A description of the processing device 400 can be found above and will not be repeated here. Specifically, the processing device 400 is used to determine the degree of adhesive float on the workpiece 01 based on the weight of the sample before and after heat treatment. A description of the measurement of the degree of adhesive float can be found above and will not be repeated here.

[0252] At this time, the powder scraping system 1000 is equipped with a processing device 400, which can realize the automated calculation of measurement results, reduce manual workload, and also help improve the accuracy of test results.

[0253] Figure 20 This is a flowchart illustrating a method for detecting the degree of adhesive floatation according to one or more embodiments.

[0254] Additionally, please refer to Figure 20 This application also provides a method for detecting the degree of adhesive floating, including:

[0255] P10. Based on any of the above embodiments, the powder scraping device 100 obtains the upper and lower samples of the target workpiece 01.

[0256] The upper sample is obtained by the powder scraping device 100 scraping off the coating layer 01b located in the upper region q1 of the target workpiece 01. The lower sample is obtained by the powder scraping device 100 scraping off the coating layer 01b located in the lower region q3 of the target workpiece 01. The half of the coating layer 01b on the workpiece 01 in the thickness direction H, closest to the substrate 01a, can be designated as the lower region q3 (i.e., the thickness H3 of the lower region q3 is equal to half the thickness H of the coating layer 01b), and the half of the region furthest from the substrate 01a can be designated as the upper region q1 (i.e., the thickness H1 of the upper region q1 is equal to half the thickness H of the coating layer 01b). The specific ratio between the thickness of the upper region q1 and the lower region q3 can be flexibly designed according to actual needs and is not limited here.

[0257] P20. Heat-treat the upper sample and the lower sample at the same at least one target temperature; weigh and record the weight M of the upper sample before heat treatment for each target temperature. 10 (T i ) and weight M after heat treatment 11 (T i ), and the weight M of the lower sample before heat treatment. 20 (T i ) and weight M after heat treatment 21 (T i ), where Ti represents the i-th target temperature, i is a positive integer less than or equal to N, N is the number of target temperatures, and the larger i is, the larger the target temperature represented by Ti is;

[0258] The target temperature is the thermal decomposition temperature of a certain substance contained in the coating layer 01b of workpiece 01. After the sample is heat-treated at the target temperature, at least one substance in the sample with a thermal decomposition temperature lower than or equal to the target temperature is thermally decomposed.

[0259] "Heat-treating the upper and lower samples at the same at least one target temperature" means that the upper and lower samples are heat-treated separately at each target temperature. If there is only one target temperature, the upper and lower samples are heat-treated only at that target temperature. If there are multiple target temperatures, multiple upper and lower samples are prepared, and one or more upper samples and one or more lower samples are heat-treated at each target temperature.

[0260] Weigh and record the weights of the upper and lower samples before and after heat treatment at each target temperature. For example, before heat treating the upper sample at the first target temperature, weigh the upper sample to obtain its weight M. 10(T1), and then after heat-treating the upper sample at the first target temperature, the upper sample is weighed to obtain the weight M. 11 (T1).

[0261] In step P20, the sample is heat-treated using a sintering furnace 200, and the weight of the sample before and after heat treatment is measured using a balance device 300. The heating process of the sintering furnace 200 during heat treatment at each target temperature can be roughly as follows: starting from room temperature, heating is carried out at a uniform rate to the target temperature. Once the target temperature is reached, heating is immediately stopped, or the temperature is held for a certain period before stopping. The furnace can be cooled by activating either an air-cooling or water-cooling device, or by natural cooling. Once the temperature drops to the preset temperature, the furnace is opened and the sample is taken. Typically, the preset temperature is less than 100℃, and can specifically be selected from 90℃, 80℃, 70℃, 60℃, 50℃, 40℃, 30℃, or any value between any two adjacent values. Optionally, the preset temperature can be selected within the range of 80℃ to 60℃, where the sample temperature is suitable and the cooling time is short, meeting the sample temperature measurement requirements and accelerating the detection process.

[0262] In theory, the material composition of the upper and lower samples obtained from the same workpiece 01 is basically the same. The difference may lie in the content of a certain component, such as the adhesive floating phenomenon causing the adhesive content in the upper and lower samples to be different.

[0263] Among them, M 10 (T i M represents the weight of the upper sample before heat treatment at the i-th target temperature. 11 (T i M represents the weight of the upper sample after heat treatment at the i-th target temperature. 201 (T i M represents the weight of the lower sample before heat treatment at the i-th target temperature. 211 (T i ) represents the weight of the lower sample after heat treatment at the i-th target temperature.

[0264] Where N represents the number of target temperatures, i represents the index of the target temperature in ascending order among all target temperatures, and T i This represents the temperature value of the i-th target temperature. The larger the i, the higher the corresponding target temperature value. T i The larger the value, the better. i+1 Greater than T i .

[0265] In the coating layer 01b of workpiece 01, taking the electrode as an example, in addition to the active material, one or more binders may be added. Each binder has a different thermal decomposition temperature, some high and some low. When multiple binders are added to the coating layer 01b of workpiece 01, multiple identical samples can be heat-treated at the thermal decomposition temperature of each binder. The content of each binder component can then be determined based on the weight change of each sample before and after heat treatment.

[0266] P30, based on M corresponding to all target temperatures 10 (T i M 11 (T i M 20 (T i ) and M 21 (T i The degree of adhesive floating δ of the target workpiece 01 is obtained.

[0267] As stated above, the calculation method for the degree of adhesive float δ of workpiece 01 is as follows: Wherein, S1 represents the adhesive content of the upper region q1 (i.e., the adhesive content of the upper sample), and S2 represents the sample content of the lower region q3 (i.e., the adhesive content of the lower sample).

[0268] For example, if the target temperature includes a first target temperature T1, and the adhesive component that thermally decomposes at the first target temperature T1 is A1, then the degree of floating of adhesive A1 in workpiece 01, δ(A1), satisfies:

[0269]

[0270] Wherein, S1(A1) refers to the content of binder A1 in the upper sample, and S2(A1) refers to the content of binder A1 in the lower sample. S1(A1) can be determined based on the weight M of the upper sample before heat treatment at the first target temperature T1. 10 (T1) and weight M after heat treatment 11 The difference between (T1) and S2(A1) can be obtained based on the weight M of the upper sample before heat treatment at the first target temperature T1. 20 (T1) and weight M after heat treatment 21 The difference (T1) is obtained.

[0271] For example, the target temperature also includes a second target temperature T2. The adhesive component that thermally decomposes at the second target temperature T2 is A2. Then, the degree of upward movement of adhesive A2 in workpiece 01, δ(A2), satisfies:

[0272]

[0273] Wherein, S1(A2) refers to the content of adhesive A2 in the upper sample, and S2(A2) refers to the content of adhesive A2 in the lower sample.

[0274] Because both adhesives A1 and A2 undergo thermal decomposition at the second target temperature T2, the thermal weight loss (M) of the upper sample at the second target temperature T2 is then used to calculate S1(A2). 10 (T2) minus M 11 The composition of adhesive A1 needs to be subtracted from (T2). The composition of adhesive A1 can be calculated in the above way (i.e., S1(A1)).

[0275] Similarly, when calculating S2(A2), the thermal weight loss of the upper sample at the second target temperature T2 (i.e., M) is calculated. 20 (T2) minus M 21 The composition of adhesive A1 needs to be subtracted from (T2). The composition of adhesive A1 can be calculated in the above way (i.e., S2(A1)).

[0276] The adhesive floating degree detection method provided in this application embodiment has high powder scraping accuracy and high detection accuracy because it uses the powder scraping device 100 in the above embodiment to obtain the sample. Moreover, it can be adapted to the detection of adhesive floating degree of workpieces 01 containing one or more adhesive components, and the range of workpiece types that can be adapted is relatively wide.

[0277] Figure 21 This is a partial flowchart of step P10 in the adhesive floating degree detection method according to one or more embodiments.

[0278] In some embodiments, please refer to Figure 21 To obtain the upper and lower samples of the target workpiece, including:

[0279] P11. Along the thickness direction H of the target workpiece, scrape off the powder in the upper layer region q1, the middle layer region q2 and the lower layer region q3 of the target workpiece in sequence.

[0280] P12. The upper sample is obtained by scraping the powder from the upper region q1, and the lower sample is obtained by scraping the powder from the lower region q3.

[0281] In this embodiment, along the thickness direction H of the target workpiece, the coating layer 01b is divided into an upper region q1, a middle region q2, and a lower region q3, with the lower region q3 disposed on the substrate 01a of the workpiece 01.

[0282] When the scraping equipment 100 performs the scraping operation, the feeding process of the scraper device 20 is roughly as follows: 1) First scraping: The blade of the scraper device 20 is brought into contact with the surface of the coating layer 01b of the workpiece 01 (this can be determined by the visual inspection device 70). 2) First feeding and scraping: The first feeding amount is made according to the thickness H1 of the upper region q1, and the roller 10 is rotated at a preset angle to obtain the upper sample. 3) First retraction and reverse rotation of the roller 10 at the preset angle. 4) Second scraping: The blade of the scraper device 20 is brought into contact with the surface of the coating layer 01b of the workpiece 01 after removing the upper region q1. 5) Second feeding and scraping: The second feeding amount is made according to the thickness H2 of the middle region q2, and the roller 10 is rotated at a preset angle. 6) Second retraction and reverse rotation of the roller 10 at the preset angle. 7) Third scraping: The blade of the scraper device 20 is brought into contact with the surface of the coating layer 01b of the workpiece 01 after removing the middle region q2. 8) Three-stage cutting and powder scraping: The third cutting amount is made according to the thickness H3 of the lower layer area q3, and the roller body is rotated 10 at a preset angle to obtain the lower layer sample; 9) Three-stage retraction.

[0283] At this point, the coating layer 01b is divided into three regions along the thickness direction H. The upper region q1 and the lower region q3 have smaller thicknesses, and the sample data from the upper region q1 and the lower region q3 are more likely to reflect the true floating situation of the adhesive, resulting in more accurate test results.

[0284] In some embodiments, the thickness of the target workpiece is H, and the thickness H1 of the upper region q1, the thickness H2 of the middle region q2, and the thickness H3 of the lower region q3 satisfy the following:

[0285] H1 = H2 = H3 = 1 / 3H, or H1 = H3 = 1 / 4H and H2 = 1 / 2H.

[0286] When H1 = H2 = H3 = 1 / 3H, it means that the thickness of the upper region q1, the middle region q2, and the lower region q3 is the same. In this way, the feed amount of the scraper is the same each time it enters the tool, and the tooling process is relatively simpler.

[0287] When H1 = H3 = 1 / 4H and H2 = 1 / 2H, it means that the thickness H1 of the upper region q1 and the thickness of the lower region q3 are the same, and their sum is equal to half the thickness H of the coating layer 01b. The thickness H2 of the middle region is half the thickness H of the coating layer 01b. In this case, the thicknesses of the upper region q1 and the lower region q3 are the same and relatively small. The sample data of the upper region q1 and the lower region q3 more easily reflect the true floating situation of the adhesive, and the test results are more accurate.

[0288] Of course, by setting the thickness H1 of the upper region q1 and the thickness H2 of the lower region q3 to be the same, the weight of the upper sample and the weight of the lower sample obtained during powder scraping will be basically the same, which facilitates the design of subsequent experiments.

[0289] In some embodiments, after obtaining the upper and lower samples of the target workpiece, the method further includes: placing the upper and lower samples into a crucible 220.

[0290] Accordingly, M 10 (T i M 11 (T i M 20 (T i ) and M 21 (T i All of these include the mass of the crucible 220 where the corresponding sample is located.

[0291] During powder scraping, the sample is collected in the receiving box 40, which is usually made of plastic and cannot withstand high-temperature heat treatment. Therefore, the sample needs to be removed from the receiving box 40 and placed into the crucible 220. The crucible 220 is usually made of ceramic, which can withstand high temperatures without the internal substances decomposing, making it an ideal heat treatment container.

[0292] Therefore, the weight obtained when weighing the sample before and after heat treatment includes the weight of crucible 220. Since crucible 220 does not thermally decompose substances during heat treatment, its weight remains essentially unchanged before and after the treatment. Therefore, the weight of crucible 220 does not affect the determination of the binder content using the sample's weight before and after heat treatment.

[0293] At this point, the sample can be placed in crucible 220 to achieve heat treatment of the sample and facilitate weighing of the sample.

[0294] Figure 22 This is a flowchart illustrating step P30 in an adhesive floating degree detection method according to one or more embodiments.

[0295] In some embodiments, please refer to Figure 22 According to M corresponding to all target temperatures 10 (T i M 11 (T i M 20 (T i ) and M 21 (T i The degree of adhesive float δ on the target workpiece is obtained, including:

[0296] P31, based on M corresponding to all target temperatures 10 (T i ) and M 11 (T i The content of the upper adhesive layer, S1, is obtained, and S1 satisfies:

[0297]

[0298] P32, Based on M corresponding to all target temperatures 20 (T i ) and M 21 (T i The content of the lower adhesive layer, S2, is obtained, and S2 satisfies:

[0299]

[0300] P33. Based on S1 and S2, the degree of adhesive floating on the target workpiece, δ, satisfies:

[0301] In steps P31 and P32, the binder content refers to the percentage of the target component's weight in the total weight of the sample before heat treatment.

[0302] When N equals 1, it means that both the upper and lower samples are heat-treated at a target temperature. The resulting adhesive content is the percentage of the weight of all components that can be thermally decomposed at that target temperature in the sample weight before heat treatment.

[0303] When N is greater than 1, it means that both the upper and lower samples are heat-treated at at least two target temperatures. The final adhesive content is the percentage of the weight of the component whose thermal decomposition temperature is at the highest target temperature in the sample weight before heat treatment.

[0304] At this point, by expressing the binder content as a percentage, the requirement for uniformity in the weight of each heat-treated sample is lower when heat-treating the upper and lower samples, simplifying the processing and improving detection efficiency.

[0305] In some embodiments, the target workpiece is a negative electrode sheet containing a dispersant and a negative electrode binder. The target temperature includes a first target temperature T1 and a second target temperature T2. The first target temperature T1 is higher than the second target temperature T2, and T1 corresponds to the thermal decomposition temperature of the dispersant, while the second target temperature T2 corresponds to the thermal decomposition temperature of the negative electrode binder.

[0306] Dispersants are agents that promote the uniform dispersion of material particles in a medium, forming a stable suspension. Typically, the dispersant in negative electrode sheets can be, but is not limited to, sodium carboxymethyl cellulose (CMC).

[0307] Binders are substances that bind and connect materials. In electrode materials, binders are mainly used to connect particulate electrode active materials, conductive agents and electrode current collectors, so that they have a good electronic conductivity network. This allows electrons to arrive quickly when lithium ions are inserted into the active material during the charge and discharge cycle of the battery, so as to complete the charge balance process.

[0308] The negative electrode binder is the binder used in the electrode paste of the negative electrode sheet. Typically, the negative electrode binder used in the negative electrode sheet can be, but is not limited to, styrene-butadiene rubber (SBR). Sodium carboxymethyl cellulose and styrene-butadiene rubber are commonly used additives in the electrode paste of negative electrode sheets; their properties and functions are not detailed here, but can be found in existing technologies. Furthermore, the specific types of sodium carboxymethyl cellulose and styrene-butadiene rubber are not limited.

[0309] For the negative electrode sheet, the negative electrode active material is usually mixed with CMC and SBR in conjunction with an aqueous solvent to obtain the negative electrode coating material. The preparation process of the negative electrode sheet is not described in detail in this embodiment; please refer to conventional practices in the art. The negative electrode sheet uses SBR as the main binder, and an appropriate amount of CMC is added to improve the slurry performance. When testing the degree of binder flotation, the calculation of the binder flotation degree is generally based on the degree of SBR flotation.

[0310] When testing the degree of binder flotation on the negative electrode sheet, heat treatment is required at two target temperatures: a first target temperature T1 and a second target temperature T2. The dispersant undergoes primary thermal decomposition at the first target temperature T1, meaning the first target temperature T1 corresponds to the thermal decomposition temperature of the dispersant. In this case, if CMC is used as the dispersant, the first target temperature T1 can be selected within the range of 280℃ to 330℃. Specifically, the first target temperature T1 can be selected as 285℃, 290℃, 295℃, 300℃, 310℃, 320℃, 330℃, or any value between any two adjacent selections.

[0311] The thermal decomposition of the negative electrode binder mainly occurs at the second target temperature T2. When SBR is used as the dispersant, the second target temperature T2 can be selected within the range of 650℃ to 700℃. Specifically, the second target temperature T2 can be selected as 655℃, 660℃, 670℃, 680℃, 690℃, 700℃, or any value between any two adjacent selections.

[0312] Since the dispersant (such as CMC) has already been thermally decomposed at the second target temperature T2, the difference in weight of the sample before and after heat treatment at the second target temperature T2 includes the content of both the dispersant and the negative electrode binder. Therefore, when calculating the binder content at the negative electrode sheet, the calculation method corresponding to S1 and S2 under the condition that N is greater than 1 is required. The details are not elaborated here; please refer to the above description.

[0313] In some embodiments, the target workpiece is a positive electrode sheet containing a positive electrode binder, and the target temperature includes only a first target temperature T1, which corresponds to the thermal decomposition temperature of the positive electrode binder.

[0314] The positive electrode binder has the functions described above, and will not be elaborated further here. The positive electrode binder is the binder used in the electrode slurry of the positive electrode sheet. The positive electrode binder used in the positive electrode sheet can be, but is not limited to, polyvinylidene fluoride (PVDF). PVDF is a common type of binder used in the coating slurry for preparing positive electrode sheets. The specific type of PVDF used in the positive electrode sheet is not limited in the embodiments of this application.

[0315] For positive electrode sheets, PVDF is typically used as the main binder, mixed with the oily solvent N-methylpyrrolidone (NMP) to prepare the positive electrode coating slurry. The preparation process of the positive electrode sheet is not detailed in this embodiment; please refer to conventional practices in the art. When testing the degree of binder buoyancy in positive electrode sheets using PVDF as the main binder, heat treatment is generally performed only at the thermal decomposition temperature corresponding to PVDF. The weight difference before and after heat treatment essentially represents the PVDF content.

[0316] The first target temperature T1 corresponds to the thermal decomposition temperature of the positive electrode binder. When the positive electrode binder is PVDF, the range of the first target temperature T1 can be 300℃ to 350℃. Specifically, the first target temperature T1 can be selected as 300℃, 310℃, 320℃, 330℃, 340℃, 350℃, or any value between any two adjacent selections.

[0317] When calculating the amount of binder floating in the positive electrode sheet, the calculation method for S1 and S2 under the condition that N equals 1 is required. The details will not be elaborated here, please refer to the above.

[0318] The method for detecting the degree of binder floating proposed in this application embodiment can be used to obtain electrodes after the coating process. Based on the above-mentioned method for detecting the degree of binder floating, it can guide the improvement of coating processes and lithium-ion battery formulations, reduce the risk of binder floating deterioration causing electrode sticking during rolling, improve product qualification rate, help reduce the probability of electrode peel strength and flexibility decay, reduce the risk of coating layer peeling off from current collector, help reduce electrode impedance, improve cell rate performance, reduce capacity decay, and improve battery cycle life. When using the above detection method to detect the degree of binder floating on the electrode, the detection results have good reproducibility and repeatability.

[0319] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0320] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A powder scraping device, characterized in that, The powder scraping device (100) includes: A roller body (10) is rotatably disposed about a preset axis (Z), the roller body (10) having a contact surface (m1) disposed around the preset axis (Z); and The scraper device (20) is located on one circumferential side of the roller body (10); The fixing device (30) includes a clamping assembly (31) disposed on the roller body (10). The fixing device (30) further includes a moving component (32), which is disposed on the roller body (10) and connected to the clamping component (31), and is used to drive the clamping component (31) to move in a first direction (X1) intersecting the preset axis (Z); The moving component (32) includes: A first connecting rod (32a) and a second connecting rod (32b) are spaced apart at one end and are both rotatably mounted on the roller body (10) about a direction parallel to the preset axis (Z), and the clamping assembly (31) is mounted on the first connecting rod (32a); and The intermediate connecting rod (32c) has one end rotatably mounted on the first connecting rod (32a), and the other end connected to the other end of the second connecting rod (32b); One of the other ends of the intermediate link (32c) and the second link (32b) has a connector (h1), and the other has an arc-shaped connecting part (h2). The connector (h1) is rotatably disposed within the arc connecting part (h2), and its position is adjustable in the extending direction of the arc connecting part (h2); the central axis of the arc connecting part (h2) coincides with the rotation axis of the second connecting rod (32b).

2. The powder scraping device according to claim 1, characterized in that, The fixing device (30) is arranged around the roller body (10).

3. The powder scraping device according to claim 1, characterized in that, The clamping assembly (31) includes: The first member (31a) has a first through-hole (g1); and The second member (31b) has a second through part (g2). The first member (31a) and the second member (31b) are configured to be able to move relative to each other in a first direction (X1) intersecting the preset axis (Z), and have a first relative position (w1) and a second relative position (w2) during the relative movement. When in the first relative position (w1), the first through part (g1) and the second through part (g2) are offset in the first direction (X1); when in the second relative position (w2), the first through part (g1) and the second through part (g2) are aligned in the first direction (X1).

4. The powder scraping device according to claim 3, characterized in that, The first rod (31a) and the second rod (31b) both extend along a second direction (X2) parallel to the preset axis (Z); the first through part (g1) and the second through part (g2) both extend along the second direction (X2).

5. The powder scraping device according to claim 3, characterized in that, The first rod (31a) has an internal receiving space (K) which is connected to the first through part (g1); the second rod (31b) is located in the receiving space (K).

6. The powder scraping device according to claim 5, characterized in that, The clamping assembly (31) also includes a transmission rod (31c) located in the receiving space (K). The transmission rod (31c) is fixedly connected to the second rod (31b) and is configured to be movably disposed relative to the first rod (31a) in the first direction (X1).

7. The powder scraping device according to claim 6, characterized in that, The clamping assembly (31) further includes a handle (31d) connected to the drive rod (31c) and configured to be operably movable relative to the first rod (31a) to drive the drive rod (31c) to move in the first direction (X1).

8. The powder scraping device according to claim 7, characterized in that, The handle (31d) is rotatably connected to the transmission rod (31c) and has an abutment position (J) that can abut against the first rod (31a). The handle (31d) is configured to rotate about the abutment (J) to drive the transmission rod (31c) to move in the first direction (X1).

9. The powder scraping device according to claim 3, characterized in that, The clamping assembly (31) further includes an elastic element (31f) that is elastically connected between the first rod (31a) and the second rod (31b) along the first direction (X1); the elastic element (31f) is used to prevent the first rod (31a) and the second rod (31b) from moving away from the first relative position (w1).

10. The powder scraping device according to claim 1, characterized in that, The roller body (10) also has a clearance surface (m2), which is adjacent to the contact surface (m1) along the circumference of the roller body (10). The clearance surface (m2) is recessed relative to the contact surface (m1) towards the preset axis (Z) to form an opening groove (C), which is through in a direction parallel to the preset axis (Z). The opening slot (C) is located on the movement path of the clamping assembly (31).

11. The powder scraping device according to any one of claims 1-10, characterized in that, The fixing device (30) includes two sets of clamping assemblies (31) arranged at intervals in the circumferential direction of the roller body (10).

12. The powder scraping device according to any one of claims 1-10, characterized in that, The scraper device (20) includes: Knife holder (22); and The tool holder (21) is provided on the tool holder (22), and the tool holder (21) is movably provided relative to the roller body (10) along a third direction (X3) intersecting the preset axis (Z).

13. The powder scraping device according to claim 12, characterized in that, The scraper device (20) further includes an adjustment component (23) connected between the blade holder (22) and the blade base (21); The adjustment component (23) is configured to adjust the position of the tool holder (22) relative to the tool base (21) in a fourth direction (X4) intersecting the third direction (X3).

14. The powder scraping device according to claim 13, characterized in that, The adjustment assembly (23) includes an adjustment threaded component (23a), which is fixedly connected to the tool holder (22) and the tool support (21), and extends along the fourth direction (X4); The relative positions of the tool holder (22) and the tool support (21) in the extension direction of the adjusting thread (23a) are adjustable.

15. The powder scraping device according to any one of claims 1-10, characterized in that, The powder scraping device (100) also includes a receiving box (40), which is configured to be located on the same side of the roller body (10) as the scraper device (20).

16. The powder scraping device according to claim 15, characterized in that, The powder scraping device (100) also includes a receiving platform (50), which is located on the same side of the roller body (10) as the scraper device (20), and the receiving box (40) is supported on the receiving platform (50).

17. The powder scraping device according to claim 16, characterized in that, The receiving platform (50) has a weighing sensor (60), and the receiving box (40) bears the weight of the weighing sensor (60).

18. The powder scraping device according to any one of claims 1-10, characterized in that, The powder scraping device (100) also includes a visual inspection device (70), which is fixedly arranged relative to the roller body (10).

19. The powder scraping device according to any one of claims 1-10, characterized in that, The powder scraping device (100) also includes a feed plate (80), which is located on the opposite side of the roller body (10) along with the scraper device (20).

20. The powder scraping device according to any one of claims 1-10, characterized in that, The powder scraping device (100) also includes a frame (90), on which the roller (10) and the scraper device (20) are both mounted.

21. A powder scraping system, characterized in that, It includes a sintering furnace (200), a balance device (300), and a powder scraping device as described in any one of claims 1-20.

22. The powder scraping system according to claim 21, characterized in that, The sintering furnace (200) is equipped with a sample boat (210), which includes multiple sample placement areas (Q), and each sample placement area (Q) can hold at least one crucible (220).

23. The powder scraping system according to claim 22, characterized in that, The crucible (220) includes a crucible body (221) and a crucible lid (222). The crucible body (221) has an opening (r1), and the crucible lid (222) covers the opening (r1). The crucible lid (222) is provided with a through hole (r2) that connects the inside and outside of the crucible body (221).

24. The powder scraping system according to claim 21, characterized in that, The powder scraping system also includes a processing device (400).

25. A method for detecting the degree of adhesive floating, characterized in that, include: Based on the powder scraping equipment as described in any one of claims 1-20, an upper sample and a lower sample of the target workpiece are obtained; The upper sample and the lower sample are heat-treated at the same at least one target temperature; the weight M of the upper sample before heat treatment is weighed and recorded for each of the target temperatures. 10 (T i ) and weight M after heat treatment 11 (T i ), and the weight M of the lower sample before heat treatment. 20 (T i ) and weight M after heat treatment 21 (T i ), where Ti represents the i-th target temperature, i is a positive integer less than or equal to N, N is the number of target temperatures, and the larger i is, the larger the target temperature represented by Ti is; According to M corresponding to all the target temperatures 10 (T i M 11 (T i M 20 (T i ) and the M 21 (T i The degree of adhesive floating on the target workpiece, δ, is obtained.

26. The method for detecting the degree of adhesive floating according to claim 25, characterized in that, Obtain the upper and lower samples of the target workpiece, including: The powder in the upper region (q1), middle region (q2) and lower region (q3) of the target workpiece is scraped off sequentially along the thickness direction (H) of the target workpiece. The upper sample is obtained from the powder scraped off from the upper region (q1), and the lower sample is obtained from the powder scraped off from the lower region (q3).

27. The method for detecting the degree of adhesive floating according to claim 26, characterized in that, The thickness of the target workpiece is H, and the thickness H1 of the upper region (q1), the thickness H2 of the middle region (q2), and the thickness H3 of the lower region (q3) satisfy the following: H1=H2=H3=1 / 3H, or H1=H3=1 / 4H and H2=1 / 2H.

28. The method for detecting the degree of buoyancy of the adhesive according to claim 25, characterized in that, After obtaining the upper and lower samples of the target workpiece, the process also includes: The upper sample and the lower sample are placed in a crucible (220); Accordingly, the M 10 (T i M 11 (T i M 20 (T i ) and the M 21 (T i All of these include the mass of the crucible (220) containing the corresponding sample.

29. The method for detecting the degree of adhesive floating according to claim 25, characterized in that, According to M corresponding to all the target temperatures 10 (T i M 11 (T i M 20 (T i ) and the M 21 (T i The degree of adhesive float δ on the target workpiece is obtained by: According to M corresponding to all the target temperatures 10 (T i ) and the M 11 (T i The content of the upper adhesive layer, S1, is obtained, wherein S1 satisfies: ； According to M corresponding to all the target temperatures 20 (T i ) and the M 21 (T i The content of the lower adhesive layer, S2, is obtained, wherein S2 satisfies: ； The degree of adhesive float δ of the target workpiece is obtained according to S1 and S2, wherein δ satisfies: .

30. The method for detecting the degree of adhesive floating according to claim 25, characterized in that, The target workpiece is a negative electrode sheet containing a dispersant and a negative electrode binder. The target temperature includes a first target temperature T1 and a second target temperature T2. The first target temperature T1 is higher than the second target temperature T2. T1 corresponds to the thermal decomposition temperature of the dispersant, and the second target temperature T2 corresponds to the thermal decomposition temperature of the negative electrode binder.

31. The method for detecting the degree of adhesive floating according to claim 25, characterized in that, The target workpiece is a positive electrode sheet containing a positive electrode binder, and the target temperature includes only a first target temperature T1, which corresponds to the thermal decomposition temperature of the positive electrode binder.

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