Automatic punching and weighing device and battery manufacturing equipment and method

Abstract

The embodiment of the invention provides an automatic punching and weighing device and battery manufacturing equipment and method. The automatic punching and weighing device comprises a rack, a positioning module, a punching module and a weighing module, the positioning module is arranged on the rack, the positioning module is provided with a positioning surface, and the positioning surface is used for bearing and positioning a pole piece; the punching module is arranged on the rack and is used for punching the pole piece to obtain a detection sample; the weighing module is used for weighing the detection sample; and an appearance detection module is arranged between the punching module and the weighing module and is used for carrying out appearance inspection on the detection sample. The automatic punching and weighing device can improve the accuracy of the detection result of the surface density of the coating surface of the pole piece.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to an automatic punching and weighing device, battery manufacturing equipment and method. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the manufacturing process of batteries, the coating surface density of the pole piece is one of the most important process parameters. The coating surface density of the pole piece is monitored by weighing small discs. A circular die with a fixed area is used on the coated pole piece to cut the pole piece into small discs, which are then weighed using an electronic scale to calculate the coating surface density of the pole piece. How to improve the accuracy of the coating surface density of the pole piece is an urgent problem to be solved in battery technology. Summary of the invention

[0004] The embodiments of the present application provide an automatic punching and weighing device, a battery manufacturing device and a method, which can improve the accuracy of the results of the coating surface density detection of the pole piece.

[0005] In the first aspect, an embodiment of the present application provides an automatic punching and weighing device, which includes a frame, a positioning module, a punching module and a weighing module. The positioning module is arranged on the frame, and the positioning module is used to carry and position the pole piece; the punching module is arranged on the frame, and the punching module is used to punch the pole piece to obtain a test sample; the weighing module is used to weigh the test sample; wherein an appearance inspection module is arranged between the punching module and the weighing module, and the appearance inspection module is used to perform an appearance inspection on the test sample.

[0006] In the technical solution of the embodiment of the present application, the pole piece is carried and positioned by the positioning module, and the relative position of the pole piece is kept unchanged during the punching process. Under the punching action of the punching module, the pole piece is punched to obtain a small disc-shaped test sample, which improves the accuracy of the punching module in punching the pole piece into a small disc. By setting an appearance inspection module between the punching module and the weighing module, the appearance inspection module can perform appearance inspection on the test sample. If the test sample loses powder during the transfer process, the appearance inspection module identifies the roundness and powder loss of the test sample, and records the test sample that does not meet the requirements. Then the weighing module is used to weigh the test sample that meets the requirements and upload the data to complete the weighing of the test sample. Through the setting of the appearance inspection module, the test samples that do not meet the requirements due to the punching error of the punching module or the powder loss during the transfer process of the test sample can be screened out in advance and recorded, so that the weighing data of the weighing module is more accurate, the probability of the occurrence of batch quality problems of the pole piece is reduced, and the accuracy of the result of the coating surface density of the pole piece is improved.

[0007] According to some embodiments of the present application, at least one of the positioning module and the punching module is movably disposed on the frame.

[0008] In the above technical solution, by movably arranging at least one of the positioning module and the punching module on the frame, the punching module can realize the function of sampling multiple sampling points of the pole piece on the positioning module. The positioning module and the punching module cooperate with each other to simplify the structural complexity of the automatic punching and weighing device.

[0009] According to some embodiments of the present application, the automatic punching and weighing device also includes a first moving component and a second moving component, the first moving component is arranged on the frame, and the first moving component is used to drive the punching module to move along the first direction on the frame; the second moving component is arranged on the frame, and the second moving component is used to drive the positioning module to move along the second direction on the frame, and the first direction, the second direction and the vertical direction are perpendicular to each other.

[0010] In the above technical scheme, through the setting of the first movable component and the second movable component, the first movable component can drive the punching module to move along the first direction on the frame, and the second movable component can drive the positioning module to move along the second direction on the frame. With the cooperation of the first movable component and the second movable component, the punching module can fully cover the pole piece, and the punching module has no blind area for punching the pole piece.

[0011] According to some embodiments of the present application, the punching module, the appearance inspection module and the weighing module are distributed sequentially along the first direction.

[0012] In the above technical solution, the punching module, appearance inspection module and weighing module are distributed in sequence along the first direction. In this way, when the inspection sample is transferred, it is only necessary to move and transfer it along the first direction. The modules are less likely to interfere with each other, and the spatial layout is more reasonable.

[0013] According to some embodiments of the present application, the punching module includes a first movable seat, a punching drive and a punching knife, the first movable seat is connected to the first movable assembly; the punching drive is installed on the first movable seat; the punching knife is connected to the punching drive, and the punching drive is used to drive the punching knife to move in a vertical direction to approach or move away from the positioning module.

[0014] In the above technical solution, the first movable seat serves as the mounting base of the punching module, and the first movable seat is connected to the first movable assembly. The punching drive is arranged on the first movable seat, and the punching knife is connected to the punching drive. Under the driving action of the punching drive, the punching knife is driven to approach the positioning module in the vertical direction and contact the pole piece to punch the pole piece on the positioning module to obtain the test sample, thereby completing the punching sampling of the pole piece.

[0015] According to some embodiments of the present application, the punching module further includes a guide assembly, which is disposed on the first movable seat and is used to guide the punching knife to move in a vertical direction.

[0016] In the above technical scheme, the setting of the guide component can play a guiding role in the process of the punching knife being driven to rise and fall by the punching drive member, thereby improving the stability of the punching knife during the lifting process, reducing the risk of displacement or offset of the punching knife during the lifting process, and correspondingly improving the punching accuracy of the punching knife for pole piece sampling.

[0017] According to some embodiments of the present application, the punching module further includes a dust removal component, which is disposed on the first movable seat and is disposed toward the positioning module to remove dust from the pole piece on the positioning module.

[0018] In the above technical solution, a dust removal component is provided on the first movable seat, which can remove dust from the pole piece before and after punching, ensuring that no dust remains on the pole piece or the test sample, thereby improving the accuracy of the weighing results of subsequent test samples.

[0019] According to some embodiments of the present application, the punching module also includes a first adsorption component, which is movably disposed on a first movable seat along a vertical direction. The first adsorption component is used to adsorb the test sample after punching and transfer the test sample to the appearance inspection module following the punching module.

[0020] In the above technical solution, the first adsorption component can provide an adsorption function for the test sample after punching, and the test sample can be adsorbed and transferred to the appearance inspection module. That is, the punching module not only has the function of punching and sampling the electrode, but also has the function of transferring the sample after punching, and transferring the test sample to the appearance inspection module. In this way, the device does not need to set up an additional transfer mechanism for transferring the test sample, which simplifies the structural complexity of the device. In addition, the method of transferring the test sample by negative pressure adsorption reduces the risk of damage or breakage of the small disc during the transfer process compared to manual transfer of the small disc.

[0021] According to some embodiments of the present application, the punching module also includes a color sensor, which is arranged on the first movable seat. The color sensor is electrically connected to the control system. The color sensor is used to scan the entire film area of ​​the pole piece before punching the pole piece to identify the thinned area of ​​the pole piece. The control system controls the punching module to avoid the thinned area when punching the pole piece.

[0022] In the above technical solution, there is a risk of mistakenly sampling the thinned area within 10mm of the edge of the electrode when manually sampling the electrode, resulting in a low actual weight of the test sample, which is prone to batch quality problems. Through the setting of the color sensor, under the cooperation of the first moving component and the second moving component, before the punching module punches the electrode, the punching module scans the full film area and the width of each film area of ​​the electrode on the positioning module through the color sensor, and the control system obtains the data sent back by the color sensor in real time. The control system calculates the punching position of the electrode and automatically avoids the thinned area of ​​the electrode, so as to achieve zero deviation of the uploaded data of the subsequent test samples.

[0023] According to some embodiments of the present application, the positioning module includes a positioning platform and a second adsorption component, the positioning platform is connected to the second movable component, the positioning platform has a first bearing surface for bearing the pole piece; the second adsorption component is arranged on the positioning platform, and the second adsorption component is used to form a negative pressure on the first bearing surface to adsorb and position the pole piece.

[0024] In the above technical solution, the second adsorption component can be used to negatively adsorb and position the pole piece on the positioning table, ensuring that the position of the pole piece will not shift during the process of the punching module punching and sampling the pole piece, thereby improving the accuracy of the punching module punching and sampling the pole piece.

[0025] According to some embodiments of the present application, the appearance inspection module includes a first inspection platform and a CCD camera. The first inspection platform is arranged on a frame, and the first inspection platform has a second carrying surface for carrying an inspection sample; the CCD camera is arranged on the frame and located above the first inspection platform. The CCD camera is electrically connected to the control system, and the CCD camera is used to perform an appearance inspection on the inspection sample.

[0026] In the above technical solution, the test sample can be received by the first test platform, and the CCD camera is arranged above the first test platform. The CCD camera can perform appearance inspection on the side of the test sample facing the CCD camera, identify the diameter and carbon powder loss of the test sample, and record and screen in advance the test samples that do not meet the requirements.

[0027] According to some embodiments of the present application, the appearance inspection module also includes a second inspection platform, a third adsorption component and a flipping component. The second inspection platform is located below the CCD camera and is adjacent to the first inspection platform. The second inspection platform has a third bearing surface for bearing the inspection sample. The third adsorption component is arranged on the second inspection platform, and the third adsorption component is used to form a negative pressure on the third bearing surface to adsorb and position the inspection sample. The flipping component is arranged on the frame, and the flipping component is used to drive the second inspection platform to flip toward one side of the first inspection platform to adsorb and transfer the inspection sample on the first inspection platform to the third bearing surface of the second inspection platform. When the second inspection platform is in a flat state, the second inspection platform is located on an adjacent side of the first inspection platform, and the second bearing surface and the third bearing surface are both arranged toward the CCD camera. When the second inspection platform switches from a flat state to a flipping state, the second inspection platform flips toward the direction of the first inspection platform to the top of the first inspection platform, and the third bearing surface of the second inspection platform is arranged opposite to the second bearing surface of the first inspection platform.

[0028] In the above technical solution, since the front and back sides of the test sample are coated, the second test platform is set on one side of the first test platform, and the second test platform and the first test platform are both located below the CCD camera. The second test platform is provided with a third adsorption component, and the second test platform can switch between the flipping state and the flat state through the flipping component to transfer the test sample on the first test platform to the second test platform, so as to realize the flipping detection of the test sample by the CCD camera, so that the CCD camera can realize the appearance detection of the coating on the front and back sides of the test sample. The pole piece adopts the method of adsorption transfer and flipping by the third adsorption component during the flipping process. Compared with the manual flipping method, it reduces the risk of damage to the test sample due to collision or friction with the test sample, thereby improving the accuracy of the appearance detection of the test sample by the CCD camera.

[0029] According to some embodiments of the present application, a fourth adsorption component is provided on the first detection platform, and the fourth adsorption component is used to form a negative pressure on the second carrying surface to adsorb and position the detection sample.

[0030] In the above technical solution, the fourth adsorption component can adsorb and fix the test sample on the second carrying surface, so that the test sample is not easy to move during the detection process, thereby improving the accuracy of the appearance detection of the CCD camera.

[0031] According to some embodiments of the present application, the appearance inspection module also includes a third moving component, which is disposed on the frame, and the third moving component is used to drive the first inspection table to move along the first direction so that the first inspection table can switch between a first position and a second position, and the first inspection table is closer to the punching module when it is in the first position than in the second position; wherein, when the first inspection table is in the first position, the first inspection table is used to receive the inspection sample transferred by the punching module, and when the first inspection table is in the second position, the first inspection table is located below the CCD camera and is adjacent to the second inspection table.

[0032] In the above technical solution, the third moving component can drive the first inspection table to switch between the first position and the second position along the first direction. When the first inspection table is in the first position, it is closer to the punching module than in the second position. In this way, the punching module only needs to move to the first position with the inspection sample, and does not need to move to the second position. The first inspection table is then driven by the third moving component to be transported to the bottom of the CCD camera for the second time, which can reduce the risk of interference between the punching module and the CCD camera of the appearance inspection module, and correspondingly shorten the moving stroke of the punching module in the first direction.

[0033] According to some embodiments of the present application, the automatic pole piece punching device also includes a transfer module, which is arranged on the frame and located between the appearance inspection module and the weighing module, and the transfer module is used to transfer the test samples that are unqualified after the appearance inspection by the appearance inspection module; or, the transfer module is used to transfer the test samples that are qualified after the appearance inspection by the appearance inspection module to the weighing module.

[0034] In the above technical solution, the transfer module can be used to transfer test samples that fail the appearance inspection by the appearance inspection module, or to transfer test samples that pass the appearance inspection by the appearance inspection module to the weighing module, thereby realizing the function of transferring test samples without the need for human intervention and with a higher degree of automation.

[0035] According to some embodiments of the present application, the transfer module includes a fourth moving component, a second moving seat and a fifth adsorption component, the fourth moving component is arranged on the frame, the second moving seat is connected to the fourth moving component, and the fourth moving component is used to drive the second moving seat to move along the first direction; the fifth adsorption component is arranged on the second moving seat, and the fifth adsorption component is used to adsorb the inspection sample after the appearance inspection by the appearance inspection module; a second lifting drive component is arranged between the fifth adsorption component and the second moving seat, and the second lifting drive component is used to drive the fifth adsorption component to move in the vertical direction to approach or move away from the appearance inspection module.

[0036] In the above technical solution, the transfer module includes a fourth moving component, a second moving seat and a fifth adsorption component. The fourth moving component can drive the second moving seat to move in the first direction, and can transfer the test sample of the appearance detection module to the weighing module or discharge the test sample. The fifth adsorption component also uses negative pressure adsorption to adsorb and transfer the test sample, which is not easy to cause damage to the test sample, and improves the accuracy of the weighing data of the test sample on the weighing module. The fifth adsorption component can be driven to move in the vertical direction by the second lifting drive member, so as to approach or move away from the test sample on the appearance detection module.

[0037] According to some embodiments of the present application, the weighing module includes an electronic scale, which is electrically connected to a control system. The control system is used to receive weight data from the weighing module and then upload the weight data to a background.

[0038] In the above technical solution, the electronic scale can weigh the test samples, and the electronic scale is electrically connected to the control system. The control system can automatically upload the weighing data to the background without manual human intervention. The data is more accurate and the workload of the staff is reduced.

[0039] In a second aspect, an embodiment of the present application further provides a battery manufacturing device, the battery manufacturing device comprising the automatic punching and weighing device of any of the aforementioned embodiments.

[0040] On the third aspect, an embodiment of the present application also provides a method for an automatic punching and weighing device, which is an automatic punching and weighing device based on any of the aforementioned embodiments, and the method includes: the punching module punches the pole piece to obtain a test sample, and the test sample is transferred to the appearance inspection module, and the appearance inspection module inspects the appearance of the test sample.

[0041] According to some embodiments of the present application, when the appearance inspection module inspects the appearance of the inspection sample, the appearance inspection module performs an appearance inspection on the front and back sides of the inspection sample.

[0042] In the above technical solution, the appearance inspection module is used to perform appearance inspection on the front and back of the test sample, and there will be no missed inspection due to carbon loss on the other surface of the test sample, and the appearance inspection of the test sample is more accurate.

[0043] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0045] Figure 1 A front view of an automatic punching and weighing device provided for some embodiments of the present application;

[0046] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0047] Figure 3 A schematic diagram of the structure of an automatic punching and weighing device provided in some embodiments of the present application;

[0048] Figure 4 A schematic diagram of the structure of a punching module in an automatic punching and weighing device provided in some embodiments of the present application;

[0049] Figure 5 A partial schematic diagram of an appearance inspection module in an automatic punching and weighing device provided in some embodiments of the present application;

[0050] Figure 6 for Figure 5 A schematic diagram of the structure of the appearance detection module from another angle.

[0051] Icons: 100-automatic punching and weighing device; 10-frame; 11-stand; 12-workbench; 20-positioning module; 21-positioning platform; 211-first bearing surface; 22-second adsorption component; 30-punching module; 31-first moving seat; 32-dust removal component; 33-protective cover; 34-punching drive member; 35-punching knife; 36-guide component; 37-first adsorption component; 371-first lifting drive member; 372-first suction cup; 40-weighing module; 41-electronic scale; 42-weighing frame; 50-appearance inspection module; 51-first inspection platform; 511-second bearing surface; 512-fourth adsorption component; 52-CCD camera; 53-second Detection table; 531-third bearing surface; 532-third adsorption assembly; 54-flip assembly; 541-flip table; 542-flip motor; 55-third moving assembly; 60-first moving assembly; 61-first guide rail; 62-first drive motor; 63-first screw rod; 70-second moving assembly; 71-second guide rail; 72-second drive motor; 80-transfer module; 81-fourth moving assembly; 811-fourth drive motor; 812-fourth guide rail; 813-fourth screw rod; 82-second moving seat; 83-fifth adsorption assembly; 831-second lifting drive member; 832-second suction cup; X-first direction; Y-second direction; Z-vertical direction. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0054] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0055] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0057] The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0058] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and removed between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0059] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0060] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0061] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., may be used. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0062] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as positive electrode active materials for batteries may also be used.

[0063] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0064] As an example, the negative electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used.

[0065] In some embodiments, the negative electrode current collector has two surfaces opposite to each other in its thickness direction, and the negative electrode active material is disposed on any one or both of the two opposite surfaces of the negative electrode current collector.

[0066] As an example, the negative electrode active material may adopt the negative electrode active material for the battery known in the art. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials and lithium titanate, etc. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds and tin alloys. However, the present application is not limited to these materials, and other traditional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0067] In some embodiments, the separator is a membrane. The present application has no particular limitation on the type of the membrane, and any known porous membrane with good chemical stability and mechanical stability can be selected.

[0068] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without special restrictions. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without special restrictions. The separator can be a separate component located between the positive and negative electrodes, or it can be attached to the surface of the positive and negative electrodes.

[0069] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0070] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0071] From the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0072] At present, the coating surface density of the pole piece is monitored by weighing small discs. A circular die with a fixed area is used on the coated pole piece to cut the pole piece into small discs, and then the small discs are weighed using an electronic scale to calculate the coating surface density of the pole piece. However, when sampling the small discs punched from the pole piece, the roundness of the sampled small discs may not meet the requirements, or after the small discs are sampled, they are generally manually transferred and placed on an electronic scale for weighing. The small discs may be damaged and powdered during the transfer process, which will cause the weighing results of the small discs to be distorted, causing batch quality problems of the pole piece. How to improve the accuracy of the coating surface density results of the pole piece is an urgent problem to be solved in battery technology.

[0073] In view of this, in order to solve the problem of low accuracy of the coating surface density results of small discs, an embodiment of the present application provides an automatic punching and weighing device, which includes a frame, a positioning module, a punching module and a weighing module. The positioning module is arranged on the frame, and the positioning module is used to carry and position the pole piece; the punching module is arranged on the frame, and the punching module is used to punch the pole piece to obtain a test sample; the weighing module is used to weigh the test sample; wherein an appearance inspection module is arranged between the punching module and the weighing module, and the appearance inspection module is used to perform an appearance inspection on the test sample.

[0074] In such an automatic punching and weighing device, by setting an appearance inspection module between the punching module and the weighing module, the appearance inspection module can perform appearance inspection on the test sample, identify the diameter and powder loss of the test sample, and record the test sample that does not meet the requirements. Then the test sample that meets the requirements is weighed and the data is uploaded to complete the weighing of the test sample. Through the setting of the appearance inspection module, the test samples that do not meet the requirements can be screened out in advance and recorded, which is not easy to cause distortion of the weighing data of the weighing module, and improves the accuracy of the coating surface density results of the pole piece.

[0075] The present application embodiment provides an automatic punching and weighing device, please refer to Figures 1 to 6 The automatic punching and weighing device 100 includes a frame 10, a positioning module 20, a punching module 30 and a weighing module 40. The positioning module 20 is arranged on the frame 10, and the positioning module 20 is used to carry and position the pole piece; the punching module 30 is arranged on the frame 10, and the punching module 30 is used to punch the pole piece to obtain a test sample; the weighing module 40 is used to weigh the test sample; wherein, an appearance inspection module 50 is arranged between the punching module 30 and the weighing module 40, and the appearance inspection module 50 is used to perform an appearance inspection on the test sample.

[0076] The pole piece can be a positive pole piece or a negative pole piece. The upper and lower surfaces of the pole piece are coated with a coating.

[0077] The rack 10 refers to a frame structure that can provide a bearing function for each module, and the rack 10 can be a frame structure. The rack 10 can include a stand 11 and a workbench 12, and the workbench 12 is horizontally arranged on the stand 11, and the workbench 12 can be used to install the positioning module 20. The punching module 30 is arranged on the stand 11 of the rack 10, and the appearance inspection module 50 can be arranged on the stand 11 and the workbench 12 of the rack 10.

[0078] The positioning module 20 refers to a tooling structure that can provide bearing and positioning functions for the electrode. When the punching module 30 punches small discs from the electrode to take samples, the positioning module 20 can maintain the relative position of the electrode, which is conducive to the punching module 30 to punch the electrode to obtain small discs. The small discs are the above-mentioned test samples.

[0079] The positioning module 20 can use a variety of methods to achieve the positioning of the pole piece. The positioning module 20 can use negative pressure adsorption to position the pole piece, or it can use a pressure holding method to position the pole piece, such as a downward pressure cylinder, etc. The specific structure of the positioning module 20 can be determined according to actual conditions.

[0080] The punching module 30 is a device that can provide a punching function for the electrode to obtain a small disc-shaped test sample. The punching module 30 has a ring-shaped die, and punches the electrode on the positioning module 20 to obtain a small disc, i.e., the test sample. When the punching module 30 punches and samples the electrode on the positioning module 20, there are many sampling points on the electrode, and the punching module 30 and the positioning module 20 need to be able to move relative to each other, so as to realize the position switching of multiple sampling points on the electrode.

[0081] It should be noted that the electrode generally does not lose powder during transportation. The roundness of the test sample may not meet the requirements when sampling, or the test sample may lose powder when transferring, both of which will affect the weighing data of the test sample. For example, when the punching module 30 samples the electrode, it may mistakenly take the position of the thinning area of ​​the electrode, resulting in the coating thickness of the test sample not meeting the requirements, which will affect the weighing data of the electrode. Alternatively, the knife die of the punching module 30 may wear out after a long period of use, resulting in the roundness of the test sample not meeting the requirements, which will also affect the weighing data of the test sample. Of course, during the transfer of the test sample, the test sample may lose powder due to scratching, which will also affect the weighing data of the test sample. The above-mentioned various situations will affect the weighing data of the test sample. Through the setting of the appearance inspection module 50, this solution can screen out and record in advance the test samples that do not meet the requirements due to the punching error of the punching module 30 or the powder loss during the test sample transfer process, so as to avoid the distortion of weighing data caused by the test samples that have lost powder during the sampling or transfer process being weighed in the weighing module 40, and thus the occurrence of batch quality problems of electrodes.

[0082] In the technical solution of the embodiment of the present application, the pole piece is carried and positioned by the positioning module 20, and the relative position of the pole piece during the punching process is kept unchanged. Under the punching action of the punching module 30, the pole piece is punched to obtain a small disc-shaped test sample, thereby improving the accuracy of the punching module 30 in punching the pole piece into a small disc. By providing an appearance inspection module 50 between the punching module 30 and the weighing module 40, the appearance inspection module 50 can perform an appearance inspection on the test sample. If the test sample loses powder during the transfer process, the appearance inspection module 50 identifies the roundness and powder loss of the test sample, and records the test sample that does not meet the requirements. Then, the weighing module 40 is used to weigh the test sample that meets the requirements and upload the data to complete the weighing of the test sample. Through the setting of the appearance inspection module 50, the inspection samples that do not meet the requirements due to the punching error of the punching module or the powder loss during the transfer process of the inspection samples can be screened out in advance and recorded. In this way, the weighing data of the weighing module 40 is more accurate, which reduces the probability of batch quality problems of the pole pieces and improves the accuracy of the coating surface density results of the pole pieces.

[0083] According to some embodiments of the present application, at least one of the positioning module 20 and the punching module 30 is movably disposed on the frame 10 .

[0084] At least one of the positioning module 20 and the punching module 30 is movably arranged on the frame 10, which means that at least one of the positioning module 20 and the punching module 30 can move relative to the other. The relative movement between the punching module 30 and the positioning module 20 can be carried out in a variety of ways. The first way is that the punching module 30 does not move, the positioning module 20 moves, and the positioning module 20 drives the pole piece to move to the punching module 30 for the punching module 30 to punch and sample. The second way is that the punching module 30 moves, the positioning module 20 does not move, the pole piece on the positioning module 20 does not move, and the punching module 30 moves to the target position to perform punching sampling operations with the pole piece on the positioning module 20, and complete the sequential sampling of multiple sampling points on the pole piece. The third way is that the punching module 30 moves, the positioning module 20 can also move, and the punching module 30 and the positioning module 20 cooperate with each other to move, so as to realize the punching sampling operation of the punching module 30 on the multiple sampling points of the pole piece on the positioning module 20.

[0085] By movably arranging at least one of the positioning module 20 and the punching module 30 on the frame 10, the punching module 30 can realize the function of sampling multiple sampling points of the pole piece on the positioning module 20. The positioning module 20 and the punching module 30 work together to simplify the structural complexity of the automatic punching and weighing device.

[0086] According to some embodiments of this application, please combine Figure 1 , Figure 2 and Figure 3 The automatic punching and weighing device 100 also includes a first moving assembly 60 and a second moving assembly 70. The first moving assembly 60 is arranged on the frame 10, and the first moving assembly 60 is used to drive the punching module 30 to move along the first direction X on the frame 10; the second moving assembly 70 is arranged on the frame 10, and the second moving assembly 70 is used to drive the positioning module 20 to move along the second direction Y on the frame 10. The first direction X, the second direction Y and the vertical direction Z are perpendicular to each other.

[0087] The first direction X may be the length direction of the pole piece, the second direction Y may be the width direction of the pole piece, and the vertical direction Z may be the thickness direction of the pole piece. The first moving assembly 60 is disposed on the stand 11 , and the second moving assembly 70 is disposed on the workbench 12 .

[0088] The first moving assembly 60 and the second moving assembly 70 can be a variety of linear drive mechanisms. The first moving assembly 60 can be a linear drive mechanism such as a screw nut pair mechanism, a cylinder, a hydraulic cylinder, a gear rack mechanism, or an electric push rod. Similarly, the second moving assembly 70 can also be a linear drive mechanism such as a screw nut pair mechanism, a cylinder, a hydraulic cylinder, a gear rack mechanism, or an electric push rod. The structures of the first moving assembly 60 and the second moving assembly 70 can be the same or different, depending on the actual situation.

[0089] In this embodiment, the first moving assembly 60 and the second moving assembly 70 are screw-nut sub-mechanisms. The first moving assembly 60 includes a first screw 63, a first guide rail 61, a first nut seat and a first drive motor 62. The first drive motor 62 is installed on the stand 11 of the frame 10. The first screw 63 is rotatably installed on the frame 10 along the first direction X. The driving end of the first drive motor 62 is connected to the first screw 63 to drive the first screw 63 to rotate. The first nut seat is threadedly matched with the first screw 63. The first nut seat is connected to the punching module 30. The first guide rail 61 is arranged on the frame 10 along the first direction X. The punching module 30 is slidably matched with the first guide rail 61. The first guide rail 61 is used to guide the punching module 30 to move along the first direction X. Under the action of the first drive motor 62, the first nut seat and the punching module 30 are driven to move along the first direction X on the frame 10.

[0090] The second moving assembly 70 includes a second screw rod, a second guide rail 71, a second nut seat, and a second drive motor 72. The second drive motor 72 is installed on the workbench 12 of the frame 10. The second screw rod is rotatably installed on the frame 10 along the second direction Y. The driving end of the second drive motor 72 is connected to the second screw rod to drive the second screw rod to rotate. The second nut seat is threadedly engaged with the second screw rod. The second nut seat is connected to the positioning module 20. The positioning module 20 is slidably engaged with the second guide rail 71. The second guide rail 71 is extended and arranged on the frame 10 along the second direction Y. The second guide rail 71 is used to guide the positioning module 20 to move along the second direction Y. Under the action of the second drive motor 72, the second nut seat and the positioning module 20 are driven to move along the second direction Y on the frame 10.

[0091] Through the arrangement of the first movable component 60 and the second movable component 70, the first movable component 60 can drive the punching module 30 to move along the first direction X on the frame 10, and the second movable component 70 can drive the positioning module 20 to move along the second direction Y on the frame 10. With the cooperation of the first movable component 60 and the second movable component 70, the punching module 30 can fully cover the pole piece, and the punching module 30 has no blind area for punching the pole piece.

[0092] According to some embodiments of this application, please refer to Figure 1The punching module 30, the appearance inspection module 50 and the weighing module 40 are distributed in sequence along the first direction X.

[0093] The punching module 30, the appearance inspection module 50 and the weighing module 40 are sequentially distributed along the first direction X. Thus, when the inspection sample is transferred, it only needs to be moved along the first direction X. The modules are less likely to interfere with each other, and the spatial layout is more reasonable.

[0094] According to some embodiments of this application, please refer to Figure 4 The punching module 30 includes a first movable seat 31, a punching drive member 34 and a punching knife 35. The first movable seat 31 is connected to the first movable assembly 60; the punching drive member 34 is installed on the first movable seat 31; the punching knife 35 is connected to the punching drive member 34, and the punching drive member 34 is used to drive the punching knife 35 to move along the vertical direction Z to approach or move away from the positioning module 20.

[0095] When the first moving assembly 60 is a screw nut pair mechanism, the first moving seat 31 is connected to the first nut seat, and the first moving seat 31 slides with the first guide rail 61. The first nut seat moves on the first screw 63, thereby driving the first moving seat 31 to move along the first direction X on the frame 10.

[0096] The first movable seat 31 is a seat body for mounting the punching module 30. The first movable seat 31 is slidably matched with the first guide rail 61. The number of the first guide rail 61 can be one or more. The first guide rail 61 is extended along the first direction X.

[0097] The punching knife 35 is an annular cutting die, and the punching driving member 34 refers to a driving member capable of driving the punching knife 35 to move. The punching driving member 34 may be a cylinder, which is disposed on the first movable seat 31, and the driving end of the cylinder is connected to the punching knife 35. The punching driving member 34 can drive the punching knife 35 to approach or move away from the pole piece on the positioning module 20, and the punching knife 35 can be used to punch and sample the pole piece.

[0098] Of course, the positioning module 20 may be provided with a corresponding flexible wear-resistant layer or punching groove. In this embodiment, the positioning module 20 is provided with a flexible wear-resistant layer. Under the action of the punching drive 34, the punching knife 35 punches the pole piece on the positioning module 20 to obtain a small disc. The wear-resistant layer provides a blocking and buffering effect. The punching knife 35 finally contacts the wear-resistant layer, and the punching knife 35 may form a knife mark of the punching knife 35 on the wear-resistant layer. Compared with the punching groove provided on the positioning module 20, due to different types of pole pieces, the sampling position or sampling point of the pole piece will also change, resulting in differences in the sampling position of the small disc. Compared with the punching groove, the setting of the flexible wear-resistant layer makes the punching knife 35 not limited by the position of the punching groove when punching the pole piece. The punching knife 35 can freely select the punching position of the pole piece under the guidance of the control system, and the punching efficiency is higher.

[0099] In addition, the punching module 30 further includes a protective cover 33 , which is disposed on the outer peripheral side of the punching knife 35 . The protective cover 33 can prevent a human hand from entering the punching area, thus playing a certain protective role.

[0100] The first movable seat 31 is used as a mounting base for the punching module 30, and the first movable seat 31 is connected to the first movable assembly 60. The punching drive 34 is disposed on the first movable seat 31, and the punching knife 35 is connected to the punching drive 34. Under the driving action of the punching drive 34, the punching knife 35 is driven to approach the positioning module 20 along the vertical direction Z and contact the pole piece to punch the pole piece on the positioning module 20 to obtain a test sample, thereby completing the punching sampling of the pole piece.

[0101] According to some embodiments of this application, please refer to Figure 4 The punching module 30 further includes a guide assembly 36 , which is disposed on the first movable seat 31 , and is used to guide the punching knife 35 to move along the vertical direction Z.

[0102] The guide assembly 36 refers to a guide component that can provide a guiding function for the punching knife 35 when it moves in the vertical direction Z. The guide assembly 36 can be a guide rod or a slide rail. The guide assembly 36 is extended along the vertical direction Z. When the guide assembly 36 is a guide rod, the punching knife 35 is correspondingly provided with a matching portion that matches the guide rod, and the matching portion is correspondingly provided with a guide hole for the guide rod to penetrate. When the guide assembly 36 is a slide rail, the punching knife 35 is correspondingly provided with a matching portion that matches the slide rail, and the matching portion is correspondingly provided with a slider that slidably matches the slide rail.

[0103] The setting of the guide component 36 can play a guiding role in the process of the punching knife 35 being driven to rise and fall by the punching drive 34, thereby improving the stability of the punching knife 35 during the lifting process, reducing the risk of displacement or offset of the punching knife 35 during the lifting process, and correspondingly improving the punching accuracy of the punching knife 35 for pole piece sampling.

[0104] According to some embodiments of the present application, the punching module 30 further includes a dust removal component 32 . The dust removal component 32 is disposed on the first movable seat 31 . The dust removal component 32 is disposed toward the positioning module 20 to remove dust from the pole piece on the positioning module 20 .

[0105] The dust removal component 32 refers to a functional component that can provide dust removal during the process of punching and sampling the electrode by the punching module 30. The dust removal component 32 can be a dust collector and a dust removal pipe. The dust collector is connected to one end of the dust removal pipe, and the dust collector can form a negative pressure adsorption area at the end of the dust removal pipe. When the punching module 30 punches the electrode, during the punching process and after the punching is completed, the punching module 30 is set on the first movable seat 31 and close to the electrode of the positioning module 20. The dust removal pipe can adsorb dust before, during or after the punching of the electrode. In order to ensure that the dust removal pipe can adsorb the dust on the electrode but cannot absorb the coating material on the electrode, the adsorption power or working power of the dust removal pipe can be effectively controlled. Of course, the dust removal pipe can also be a positive pressure blowing pipe, which blows positive pressure toward the electrode to blow away the dust on the electrode. The specific selection of the dust removal component 32 can be determined according to actual conditions.

[0106] By arranging a dust removal component 32 on the first movable seat 31, the dust removal component 32 can remove dust from the pole piece before and after punching, ensuring that no dust remains on the pole piece or the test sample, thereby improving the accuracy of the weighing results of the subsequent test samples.

[0107] According to some embodiments of this application, please refer to Figure 4 The punching module 30 also includes a first adsorption component 37, which is movably disposed on the first movable seat 31 along the vertical direction Z. The first adsorption component 37 is used to adsorb the test sample after punching, and follows the punching module 30 to transfer the test sample to the appearance inspection module 50.

[0108] The first movable seat 31 is provided with a first lifting drive member 371, which is connected to the first adsorption assembly 37 and is used to drive the first adsorption assembly 37 to move along the vertical direction Z. The first lifting drive member 371 can be a cylinder. The first adsorption assembly 37 can include a first suction cup 372, and the first lifting drive member 371 is connected to the first suction cup 372. A negative pressure adsorption hole is provided on the first suction cup 372, and a negative pressure adsorption channel is connected in the first suction cup 372, and the end of the negative pressure adsorption channel is connected to the negative pressure generator. The negative pressure adsorption force generated by the negative pressure adsorption hole on the first suction cup 372 can adsorb the test sample. After the punching module 30 transfers the test sample to the appearance inspection module 50, the negative pressure generator stops working, and the test sample and the suction cup can be separated.

[0109] The first adsorption component 37 can provide an adsorption function for the punched test sample, and transfer the test sample to the appearance inspection module 50 by adsorption. That is, the punching module 30 not only has the function of punching and sampling the electrode, but also has the function of transferring the sample after punching, and transfers the test sample to the appearance inspection module 50. In this way, the device does not need to set up an additional transfer mechanism for transferring the test sample, which simplifies the structural complexity of the device. In addition, the method of transferring the test sample by negative pressure adsorption reduces the risk of damage or breakage of the small disc during the transfer process compared to manual transfer of the small disc.

[0110] According to some embodiments of the present application, the punching module 30 also includes a color sensor, which is arranged on the first movable seat 31. The color sensor is electrically connected to the control system. The color sensor is used to scan the entire film area of ​​the pole piece before punching the pole piece to identify the thinning area of ​​the pole piece. The control system controls the punching module 30 to avoid the thinning area when punching the pole piece.

[0111] The color sensor, also known as a color sensor or a color sensor, is a prior art and will not be described in detail here. The color sensor is electrically connected to the control system, which means that the monitoring signal of the color sensor can be fed back to the control system in real time.

[0112] It can be understood that the full film area of ​​the pole piece refers to all areas of the upper surface or lower surface of the pole piece. Along the width direction of the pole piece, the pole piece includes a coating area and a blank area. The coating area refers to the area on the pole piece coated with a coating, and the blank area refers to the area on the pole piece that is not coated with a coating. The junction between the coating area and the blank area is a thinning area, which has an insulating coating, and the thickness of the coating is relatively thin, that is, the coating thickness of the thinning area of ​​the pole piece is less than the coating thickness of the coating area. In the prior art, when manually sampling the pole piece, since the thinning area also has a coating, there is a risk that the staff may mistakenly sample the thinning area when sampling the pole piece, which may cause the subsequent weighing results to be inconsistent with the actual situation, thereby causing the phenomenon of pole piece batch quality problems.

[0113] The grayscale values ​​of the coating area, the thinning area and the blank area of ​​the electrode are different, and the coating area, the thinning area and the blank area of ​​the electrode can be identified by the color sensor. The control system can record the thinning area and the blank area of ​​the electrode, and then automatically calculate the sampling point of the punching module 30, control the punching module 30 to automatically sample, and automatically avoid the thinning area of ​​the electrode.

[0114] When manually sampling the electrode, there is a risk of mistakenly sampling the thinned area within 10 mm of the edge of the electrode, resulting in a low actual weight of the sample, which is prone to batch quality problems. Through the setting of the color sensor, under the cooperation of the first moving component 60 and the second moving component 70, before the punching module 30 punches the electrode, the punching module 30 scans the full film area and the width of each film area of ​​the electrode on the positioning module 20 through the color sensor, and the control system obtains the data sent back by the color sensor in real time, calculates the punching position of the electrode, and automatically avoids the thinned area of ​​the electrode, so as to achieve zero deviation of the uploaded data of the subsequent test samples.

[0115] According to some embodiments of this application, please refer to Figure 3 The positioning module 20 includes a positioning platform 21 and a second adsorption component 22. The positioning platform 21 is connected to the second moving component 70. The positioning platform 21 has a first bearing surface 211 for bearing the pole piece. The second adsorption component 22 is arranged on the positioning platform 21. The second adsorption component 22 is used to form a negative pressure on the first bearing surface 211 to adsorb and position the pole piece.

[0116] In the case where the second moving assembly 70 is a screw-nut pair mechanism, the positioning platform 21 is slidably matched with the second guide rail 71. The number of the second guide rails 71 can be multiple, and the multiple second guide rails 71 are spaced apart on the workbench 12 along the first direction X. A second slider slidably matched with the second guide rail 71 is correspondingly provided at the bottom of the positioning platform 21, and the second slider is a dovetail-shaped slider, and the second guide rail 71 has a dovetail-shaped groove.

[0117] The second adsorption assembly 22 may include a plurality of second negative pressure adsorption holes, which are distributed on the first bearing surface 211 of the positioning platform 21 to achieve multi-point adsorption positioning of the electrode. The positioning platform 21 has a negative pressure adsorption channel connected to the plurality of second negative pressure adsorption holes, and the end of the negative pressure adsorption channel is connected to the negative pressure generator. The plurality of second negative pressure adsorption holes on the positioning platform 21 generate a negative pressure adsorption force at the first bearing surface 211, so that the electrode can be adsorbed and positioned.

[0118] The second adsorption assembly 22 can be used to perform negative pressure adsorption positioning on the electrode piece on the positioning platform 21, ensuring that the position of the electrode piece will not shift during the process of the punching module 30 punching and sampling the electrode piece, thereby improving the accuracy of the punching module 30 in punching and sampling the electrode piece.

[0119] According to some embodiments of this application, please combine Figure 1 , Figure 5 and Figure 6 The appearance inspection module 50 includes a first inspection platform 51 and a CCD camera 52. The first inspection platform 51 is arranged on the frame 10. The first inspection platform 51 has a second carrying surface 511 for carrying the inspection sample; the CCD camera 52 is arranged on the frame 10 and is located above the first inspection platform 51. The CCD camera 52 is electrically connected to the control system and is used to perform appearance inspection on the inspection sample.

[0120] The CCD camera 52 can detect the roundness and decarburization degree of the test sample (small disc). The CCD camera 52 divides the test sample into 8 diameters. The diameter of each small disc must be within 44.284±0.1mm, and the detection area must be within 1540.25±1mm. 2 The circular edge can be found inside and compared with the standard circle. The error of the monitoring area is ≤1mm 2 The grayscale value is used to identify the metal leakage of the small disc and determine the area and roundness of the small disc. The minimum recognition accuracy of the CCD camera 52 can be 0.1mm 2 .

[0121] The stand 11 is provided with a CCD camera 52, which is arranged on the CCD camera frame of the stand 11. The first test bench 51 is a test bench that provides a bearing function for the test sample, and the first test bench 51 is arranged on the workbench 12 of the frame 10 and is located below the CCD camera 52. After the punching module 30 transfers the small disc to the first test bench 51 of the appearance inspection module 50, the punching module 30 returns to the punching area again to punch and sample another sampling point on the pole piece. The appearance inspection module 50 performs appearance inspection on the test sample to realize the assembly line operation of the automatic punching and weighing device 100.

[0122] The first testing platform 51 can receive the test sample, and the CCD camera 52 is arranged above the first testing platform 51. The CCD camera 52 can perform appearance inspection on the side of the test sample facing the CCD camera 52, identify the roundness and carbon powder loss of the test sample, and record and screen in advance the test samples that do not meet the requirements.

[0123] According to some embodiments of this application, please combine Figure 1 , Figure 5 and Figure 6The appearance inspection module 50 further includes a second inspection platform 53, a third adsorption component 532 and a flip component 54. The second inspection platform 53 is located below the CCD camera 52 and is adjacent to the first inspection platform 51. The second inspection platform 53 has a third bearing surface 531 for bearing the inspection sample. The third adsorption component 532 is disposed on the second inspection platform 53. The third adsorption component 532 is used to form a negative pressure on the third bearing surface 531 to adsorb and position the inspection sample. The flip component 54 is disposed on the frame 10. The flip component 54 is used to drive the second inspection platform 53 to flip toward one side of the first inspection platform 51 to position the inspection sample. The test sample on the first test platform 51 is adsorbed and transferred to the third carrying surface 531 of the second test platform 53; wherein, when the second test platform 53 is in a flat state, the second test platform 53 is located on an adjacent side of the first test platform 51, and the second carrying surface 511 and the third carrying surface 531 are both set toward the CCD camera 52; when the second test platform 53 is switched from a flat state to a flipped state, the second test platform 53 flips toward the direction of the first test platform 51 to the top of the first test platform 51, and the third carrying surface 531 of the second test platform 53 is set opposite to the second carrying surface 511 of the first test platform 51.

[0124] When the test sample is placed on the first test table 51, taking the front of the test sample facing the CCD camera 52 as an example, the CCD camera 52 can perform appearance inspection on the front of the test sample on the first test table 51. The first test table 51 and the second test table 53 are arranged adjacent to each other, and the flip component 54 refers to a flip component that provides a flip function for the second test table 53. The flip component 54 can drive the second test table 53 to flip in the first test direction, so that the third bearing surface 531 of the second test table 53 is arranged opposite to the second bearing surface 511 of the first test table 51, and then the third adsorption component 532 on the second test table 53 is used to adsorb the test sample on the first test table 51 to the second test table 53, and then the flip component 54 switches the second test table 53 from the flipped state to the flat state, so that the back of the test sample is arranged facing the CCD camera 52, and the CCD camera 52 can perform appearance inspection on the back of the test sample.

[0125] The third adsorption assembly 532 includes a plurality of third negative pressure adsorption holes, which are distributed on the third bearing surface 531 of the second detection platform 53 to realize the adsorption and transfer functions of the detection sample. The second detection platform 53 has a negative pressure adsorption channel connected to the plurality of third negative pressure adsorption holes, and the end of the negative pressure adsorption channel is connected to the negative pressure generator. The negative pressure adsorption force generated at the third bearing surface 531 by the plurality of third negative pressure adsorption holes on the second detection platform 53 can adsorb and position the detection sample.

[0126] The flip assembly 54 includes a flip table 541 and a flip motor 542. The flip table 541 is arranged on the frame 10; the flip motor 542 is arranged on the flip table 541, and the driving end of the flip motor 542 is connected to the second detection table 53. The flip motor 542 is used to drive the second detection table 53 to switch between a flat state and a flipped state.

[0127] When the second test platform 53 is flipped over to the top of the first test platform 51, there is a certain gap between the third bearing surface 531 of the second test platform 53 and the test sample on the first test platform 51. However, the gap is small, and the gap allows the difference in thickness direction of the pole pieces of different models. In this way, when the third adsorption component 532 on the second test platform 53 is working, it can easily adsorb the test sample on the first test platform 51 to the third bearing surface 531 on the second test platform 53, and the test sample is separated from the second bearing surface 511 of the first test platform 51.

[0128] Since the front and back sides of the test sample are coated, the second test platform 53 is arranged on one side of the first test platform 51, and the second test platform 53 and the first test platform 51 are both located below the CCD camera 52. The second test platform 53 is provided with a third adsorption component 532, and the second test platform 53 can switch between the flipping state and the flat state through the flipping component 54, so as to transfer the test sample on the first test platform 51 to the second test platform 53, and realize the flipping detection of the test sample by the CCD camera 52, so that the CCD camera 52 can realize the appearance detection of the coating on the front and back sides of the test sample. The pole piece adopts the method of adsorption transfer and flipping by the third adsorption component 532 during the flipping process. Compared with the manual flipping method, the risk of damage to the test sample due to collision or friction with the test sample is reduced, thereby improving the accuracy of the appearance detection of the test sample by the CCD camera 52.

[0129] According to some embodiments of this application, please combine Figure 5 and Figure 6 A fourth adsorption component 512 is disposed on the first detection platform 51 , and the fourth adsorption component 512 is used to form a negative pressure on the second carrying surface 511 to adsorb and position the detection sample.

[0130] The fourth adsorption component 512 includes a plurality of fourth negative pressure adsorption holes, and the plurality of fourth negative pressure adsorption holes are distributed on the second bearing surface 511 of the first detection platform 51, so as to realize the adsorption and positioning function of the detection sample. The first detection platform 51 has a negative pressure adsorption channel connected to the plurality of fourth negative pressure adsorption holes, and the end of the negative pressure adsorption channel is connected to the negative pressure generator. The negative pressure adsorption force generated by the plurality of fourth negative pressure adsorption holes on the first detection platform 51 at the second bearing surface 511 can adsorb and position the detection sample.

[0131] When the second testing platform 53 is flipped over to the top of the first testing platform 51, the fourth adsorption component 512 of the first testing platform 51 stops working and does not generate adsorption force on the test sample, which is beneficial to the operation of the third adsorption component 532 on the second testing platform 53, and the test sample can be easily adsorbed and transferred to the third supporting surface 531 of the second testing platform 53.

[0132] The fourth adsorption component 512 can adsorb and fix the test sample on the second carrying surface 511 , so that the test sample is not likely to move during the detection process, thereby improving the accuracy of the appearance detection by the CCD camera 52 .

[0133] According to some embodiments of the present application, the appearance inspection module 50 also includes a third moving component 55, which is disposed on the frame 10, and the third moving component 55 is used to drive the first inspection table 51 to move along the first direction X, so that the first inspection table 51 switches between the first position and the second position, and the first inspection table 51 is closer to the punching module 30 when it is in the first position than in the second position; wherein, when the first inspection table 51 is in the first position, the first inspection table 51 is used to receive the inspection sample transferred by the punching module 30, and when the first inspection table 51 is in the second position, the first inspection table 51 is located below the CCD camera 52 and is adjacent to the second inspection table 53.

[0134] The third moving assembly 55 may be a variety of linear drive modules, and the third moving assembly 55 may be a linear drive mechanism such as a screw nut pair mechanism, a cylinder, a hydraulic cylinder, a gear rack mechanism, or an electric push rod. The specific structure of the third moving assembly 55 may be determined according to actual conditions. The third moving assembly 55 may include a third guide rail, which extends along the first direction X and is arranged on the workbench 12 of the frame 10, and the first inspection platform 51 is slidably matched with the third guide rail.

[0135] The third moving component 55 can drive the first inspection table 51 to switch between the first position and the second position along the first direction X. When the first inspection table 51 is in the first position, it is closer to the punching module 30 than in the second position. In this way, the punching module 30 only needs to move to the first position with the inspection sample, and does not need to move to the second position. The first inspection table 51 is then driven by the third moving component 55 to be transported to the bottom of the CCD camera 52 for a second time, which can reduce the risk of interference between the punching module 30 and the CCD camera 52 of the appearance inspection module 50, and correspondingly shorten the moving stroke of the punching module 30 in the first direction X.

[0136] According to some embodiments of this application, please combine Figure 1 and Figure 2The pole piece automatic punching and weighing device 100 also includes a transfer module 80, which is arranged on the frame 10 and located between the appearance inspection module 50 and the weighing module 40. The transfer module 80 is used to transfer the unqualified test samples after the appearance inspection by the appearance inspection module 50; or, the transfer module 80 is used to transfer the qualified test samples after the appearance inspection by the appearance inspection module 50 to the weighing module 40.

[0137] The transfer module 80 refers to a transfer mechanism that can provide a transfer function for the inspection sample of the appearance inspection module 50. The transfer module 80 can be a manipulator, a linear drive mechanism, etc. The specific structure of the transfer module 80 can be determined according to actual conditions.

[0138] The transfer module 80 can be used to transfer unqualified test samples after the appearance inspection by the appearance inspection module 50, or transfer qualified test samples after the appearance inspection by the appearance inspection module 50 to the weighing module 40, thereby realizing the function of transferring test samples without the need for human intervention and with a higher degree of automation.

[0139] According to some embodiments of this application, please combine Figure 1 and Figure 2 The transfer module 80 includes a fourth moving component 81, a second moving seat 82 and a fifth adsorption component 83. The fourth moving component 81 is arranged on the frame 10, and the second moving seat 82 is connected to the fourth moving component 81. The fourth moving component 81 is used to drive the second moving seat 82 to move along the first direction X; the fifth adsorption component 83 is arranged on the second moving seat 82, and the fifth adsorption component 83 is used to adsorb the test sample after the appearance inspection by the appearance inspection module 50; a second lifting drive member 831 is arranged between the fifth adsorption component 83 and the second moving seat 82, and the second lifting drive member 831 is used to drive the fifth adsorption component 83 to move along the vertical direction Z to approach or move away from the appearance inspection module 50.

[0140] The fourth moving assembly 81 can be a variety of linear drive mechanisms, and the first moving assembly 60 can be a linear drive mechanism such as a screw nut sub-mechanism, a cylinder, a hydraulic cylinder, a gear rack mechanism or an electric push rod. Taking the fourth moving assembly 81 as a screw nut sub-mechanism as an example, the fourth moving assembly 81 includes a fourth screw 813, a fourth guide rail 812, a fourth nut seat and a fourth driving motor 811, the fourth driving motor 811 is installed on the stand 11 of the frame 10, the fourth screw 813 is rotatably installed on the stand 11 along the first direction X, the driving end of the fourth driving motor 811 is connected to the fourth screw 813, driving the fourth screw 813 to rotate, the fourth nut seat is threadedly engaged with the fourth screw 813, the fourth nut seat is connected to the second moving seat 82, the fourth guide rail 812 is arranged on the stand 11 along the first direction X, the second moving seat 82 is slidably engaged with the fourth guide rail 812, and the fourth guide rail 812 is used to guide the second moving seat 82 to move along the first direction X. Under the action of the fourth driving motor 811 , the second moving seat 82 is driven to move along the first direction X on the frame 10 .

[0141] The fifth adsorption assembly 83 includes a second lifting drive member 831 and a second suction cup 832. The second lifting drive member 831 is arranged on the second movable seat 82, and the second suction cup 832 is connected to the driving end of the second lifting drive member 831. The second lifting drive member 831 can drive the second suction cup 832 to approach or move away from the test sample on the second test platform 53. A negative pressure adsorption hole is arranged on the second suction cup 832, and a negative pressure adsorption channel is connected in the second suction cup 832. The end of the negative pressure adsorption channel is connected to the negative pressure generator. The negative pressure adsorption force generated by the negative pressure adsorption hole on the second suction cup 832 can adsorb the test sample.

[0142] When the appearance inspection module 50 takes CCD photos of the inspection sample, the fourth moving assembly 81 drives the second moving seat 82 to move along the first direction X to the idle area, and the fourth moving assembly 81 does not interfere with the appearance inspection module 50 .

[0143] The transfer module 80 includes a fourth moving assembly 81, a second moving seat 82 and a fifth adsorption assembly 83. The fourth moving assembly 81 can drive the second moving seat 82 to move in the first direction X, and can transfer the test sample of the appearance inspection module 50 to the weighing module 40 or discharge the test sample. The fifth adsorption assembly 83 also uses negative pressure adsorption to adsorb and transfer the test sample, which is not easy to cause damage to the test sample, and improves the accuracy of the weighing data of the test sample on the weighing module 40. The fifth adsorption assembly 83 can be driven to move along the vertical direction Z by the second lifting drive 831, so as to approach or move away from the test sample on the appearance inspection module 50.

[0144] According to some embodiments of the present application, the weighing module 40 includes an electronic scale 41, which is electrically connected to a control system. The control system is used to receive weight data from the weighing module 40 and then upload the weight data to a backend.

[0145] The weighing module 40 further includes a weighing frame 42, on which an electronic scale is disposed. The electronic scale may be located on the frame 10 or outside the frame 10. In this embodiment, the electronic scale is located outside the frame 10. The transfer module 80 may transport the test sample to the weighing platform of the electronic scale.

[0146] The electronic scale 41 can weigh the test sample, and the electronic scale 41 is electrically connected to the control system. The control system can automatically upload the weighing data to the background without manual intervention. The weighing data is more accurate and the workload of the staff is reduced.

[0147] An embodiment of the present application further provides a battery manufacturing device, the battery manufacturing device comprising the automatic punching and weighing device of any of the aforementioned embodiments.

[0148] An embodiment of the present application also provides a method for an automatic punching and weighing device, which is an automatic punching and weighing device based on any of the aforementioned embodiments. The method includes: the punching module 30 punches the pole piece to obtain a test sample, and the test sample is transferred to the appearance inspection module 50, and the appearance inspection module 50 inspects the appearance of the test sample.

[0149] According to some embodiments of the present application, when the appearance inspection module 50 inspects the appearance of the inspection sample, the appearance inspection module 50 performs an appearance inspection on the front and back sides of the inspection sample.

[0150] By performing appearance inspection on the front and back sides of the inspection sample through the appearance inspection module 50, there will be no phenomenon of missing inspection due to carbon loss on the other surface of the inspection sample, and the appearance inspection of the inspection sample is more accurate.

[0151] In some embodiments, please refer to Figures 1 to 6 The automatic punching and weighing device 100 includes a frame 10, a positioning module 20, a punching module 30 and a weighing module 40. The positioning module 20 is arranged on the frame 10, and the positioning module 20 is used to carry and position the pole piece; the punching module 30 is arranged on the frame 10, and the punching module 30 is used to punch the pole piece to obtain a test sample; the weighing module 40 is used to weigh the test sample; wherein, an appearance inspection module 50 is arranged between the punching module 30 and the weighing module 40, and the appearance inspection module 50 is used to perform an appearance inspection on the test sample. At least one of the positioning module 20 and the punching module 30 is movably arranged on the frame 10.

[0152] The pole piece is carried and positioned by the positioning module 20, and the relative position of the pole piece is kept unchanged during the punching process. Under the punching action of the punching module 30, the pole piece is punched to obtain a small disc-shaped test sample, which improves the accuracy of the punching module 30 in punching the pole piece into a small disc. By setting an appearance inspection module 50 between the punching module 30 and the weighing module 40, the appearance inspection module 50 can perform appearance inspection on the test sample. If the test sample loses powder during the transfer process, the appearance inspection module 50 identifies the roundness and powder loss of the test sample, and records the test sample that does not meet the requirements. Then, the test sample that meets the requirements is weighed and the data is uploaded to complete the weighing of the test sample. Through the setting of the appearance inspection module 50, the test samples that do not meet the requirements can be screened out and recorded in advance, which is not easy to cause distortion of the weighing data of the weighing module 40, reducing the occurrence of batch quality problems of the pole piece and improving the accuracy of the coating surface density of the pole piece. By movably arranging at least one of the positioning module 20 and the punching module 30 on the frame 10, the punching module 30 can realize the function of sampling multiple sampling points of the pole piece on the positioning module 20. The positioning module 20 and the punching module 30 work together to simplify the structural complexity of the automatic punching and weighing device.

[0153] In some embodiments, the automatic punching and weighing device 100 further includes a first moving assembly 60 and a second moving assembly 70, wherein the first moving assembly 60 is disposed on the frame 10 and is used to drive the punching module 30 to move along the first direction X on the frame 10; the second moving assembly 70 is disposed on the frame 10 and is used to drive the positioning module 20 to move along the second direction Y on the frame 10, and the first direction X, the second direction Y and the vertical direction Z are perpendicular to each other. The punching module 30, the appearance inspection module 50 and the weighing module 40 are sequentially distributed along the first direction X.

[0154] By setting the first moving assembly 60 and the second moving assembly 70, the first moving assembly 60 can drive the punching module 30 to move along the first direction X on the frame 10, and the second moving assembly 70 can drive the positioning module 20 to move along the second direction Y on the frame 10. Under the cooperation of the first moving assembly 60 and the second moving assembly 70, the punching module 30 can fully cover the pole piece, and the punching module 30 has no punching blind area for the pole piece. The punching module 30, the appearance inspection module 50 and the weighing module 40 are sequentially distributed along the first direction X, so that when transferring the test sample, it only needs to be moved and transferred along the first direction X, and the modules are not prone to mutual interference, and the spatial layout is more reasonable.

[0155] In some embodiments, the punching module 30 includes a first movable seat 31, a punching drive 34 and a punching knife 35. The first movable seat 31 is connected to the first movable assembly 60; the punching drive 34 is installed on the first movable seat 31; the punching knife 35 is connected to the punching drive 34, and the punching drive 34 is used to drive the punching knife 35 to move along the vertical direction Z to approach or move away from the positioning module 20. The punching module 30 also includes a guide assembly 36, which is disposed on the first movable seat 31, and the guide assembly 36 is used to guide the punching knife 35 to move along the vertical direction Z. The punching module 30 also includes a dust removal component 32, which is disposed on the first movable seat 31, and the dust removal component 32 is disposed toward the positioning module 20, so as to remove dust from the pole piece on the positioning module 20. The punching module 30 further includes a first adsorption assembly 37 movably disposed on the first movable seat 31 along the vertical direction Z. The first adsorption assembly 37 is used to adsorb the punched test sample and transfer the test sample to the appearance inspection module 50 along with the punching module 30 .

[0156] The first movable seat 31 is used as the mounting base of the punching module 30, and the first movable seat 31 is connected to the first movable assembly 60. The punching drive 34 is arranged on the first movable seat 31, and the punching knife 35 is connected to the punching drive 34. Under the driving action of the punching drive 34, the punching knife 35 is driven to approach the positioning module 20 along the vertical direction Z and contact the pole piece to punch the pole piece on the positioning module 20 to obtain the test sample, thereby completing the punching sampling of the pole piece. The setting of the guide assembly 36 can play a guiding role in the process of the punching drive 34 driving the punching knife 35 to rise and fall, improve the stability of the punching knife 35 during the lifting process, reduce the risk of displacement or offset of the punching knife 35 during the lifting process, and correspondingly improve the punching accuracy of the punching knife 35 for sampling the pole piece. By setting the dust removal component 32 on the first movable seat 31, the dust removal component 32 can remove dust from the pole piece before and after punching, ensuring that there is no dust residue on the pole piece or the test sample, thereby improving the accuracy of the weighing result of the subsequent test sample. The first adsorption component 37 can provide an adsorption function for the punched test sample, and transfer the test sample to the appearance inspection module 50 by adsorption. That is, the punching module 30 not only has the function of punching and sampling the electrode, but also has the function of transferring the sample after punching, and transfers the test sample to the appearance inspection module 50. In this way, the device does not need to set up an additional transfer mechanism for transferring the test sample, which simplifies the structural complexity of the device. In addition, the method of transferring the test sample by negative pressure adsorption reduces the risk of damage or breakage of the small disc during the transfer process compared to manual transfer of the small disc.

[0157] In some embodiments, the punching module 30 further includes a color sensor, which is disposed on the first movable seat 31 and is electrically connected to the control system. The color sensor is used to scan the entire film area of ​​the electrode before punching the electrode to identify the thinning area of ​​the electrode. The control system controls the punching module 30 to avoid the thinning area when punching the electrode. The positioning module 20 includes a positioning platform 21 and a second adsorption component 22. The positioning platform 21 is connected to the second movable component 70. The positioning platform 21 has a first bearing surface 211. The second adsorption component 22 is disposed on the positioning platform 21. The second adsorption component 22 is used to form a negative pressure on the first bearing surface 211 to adsorb and position the electrode.

[0158] When manually sampling the electrode, there is a risk of mistakenly sampling the thinned area within 10 mm of the edge of the electrode, resulting in a low actual weight of the sample being weighed, which is prone to batch quality problems. Through the setting of the color sensor, under the cooperation of the first moving component 60 and the second moving component 70, before the punching module 30 punches the electrode, the punching module 30 scans the full film area and the width of each film area of ​​the electrode on the positioning module 20 through the color sensor, and the control system obtains the data sent back by the color sensor in real time. The control system calculates the punching position of the electrode, automatically avoids the thinned area of ​​the electrode, and achieves zero deviation of the uploaded data of the subsequent test samples. The second adsorption component 22 can be used to negatively adsorb and position the electrode on the positioning platform 21. During the process of punching and sampling the electrode by the punching module 30, it is ensured that the position of the electrode will not be offset, thereby improving the accuracy of the punching and sampling of the electrode by the punching module 30.

[0159] In some embodiments, the appearance inspection module 50 includes a first inspection table 51 and a CCD camera 52. The first inspection table 51 is arranged on the frame 10. The first inspection table 51 has a second bearing surface 511 for bearing the inspection sample. The CCD camera 52 is arranged on the frame 10 and is located above the first inspection table 51. The CCD camera 52 is electrically connected to the control system. The CCD camera 52 is used to perform appearance inspection on the inspection sample. The appearance inspection module 50 also includes a second inspection table 53, a third adsorption component 532 and a flip component 54. The second inspection table 53 is located below the CCD camera 52 and is arranged adjacent to the first inspection table 51. The second inspection table 53 has a third bearing surface 531 for bearing the inspection sample. The third adsorption component 532 is arranged on the second inspection table 53. The third adsorption component 532 is used to form a negative pressure on the third bearing surface 531 to adsorb and position the inspection sample. The flip component 54 is arranged on the frame 10. The flip component 54 is used to drive the second inspection table 53 to flip toward one side of the first inspection table 51 to turn the third adsorption component 532. The test sample on the first test platform 51 is transferred to the third bearing surface 531 of the second test platform 53 by adsorption; wherein, when the second test platform 53 is in a flat state, the second test platform 53 is located on the adjacent side of the first test platform 51, and the second bearing surface 511 and the third bearing surface 531 are both arranged facing the CCD camera 52; when the second test platform 53 is switched from the flat state to the flipped state, the second test platform 53 flips toward the direction of the first test platform 51 to the top of the first test platform 51, and the third bearing surface 531 of the second test platform 53 is arranged facing the second bearing surface 511 of the first test platform 51. A fourth adsorption component 512 is arranged on the first test platform 51, and the fourth adsorption component 512 is used to form a negative pressure on the second bearing surface 511 to adsorb and position the test sample.

[0160] The first inspection platform 51 can receive the inspection sample, and the CCD camera 52 is arranged above the first inspection platform 51. The CCD camera 52 can perform appearance inspection on the side of the inspection sample facing the CCD camera 52, identify the diameter and carbon powder loss of the inspection sample, and record and pre-screen the inspection samples that do not meet the requirements. Since the front and back sides of the inspection sample are coated, the second inspection platform 53 is arranged on one side of the first inspection platform 51, and the second inspection platform 53 and the first inspection platform 51 are both located below the CCD camera 52. The second test platform 53 is provided with a third adsorption component 532. The second test platform 53 can switch between the flipping state and the flat state through the flipping component 54, so as to transfer the test sample on the first test platform 51 to the second test platform 53, and realize the flipping detection of the test sample by the CCD camera 52. In this way, the CCD camera 52 can realize the appearance detection of the coating on the front and back sides of the test sample. The pole piece adopts the method of adsorption transfer and flipping by the third adsorption component 532 during the flipping process. Compared with the manual flipping method, the risk of damage to the test sample due to collision or friction with the test sample is reduced, thereby improving the accuracy of the appearance detection of the test sample by the CCD camera 52. The fourth adsorption component 512 can adsorb and fix the test sample on the second bearing surface 511, so as to prevent the test sample from moving during the detection process and improve the accuracy of the appearance detection of the CCD camera 52.

[0161] In some embodiments, the appearance inspection module 50 further includes a third moving assembly 55, which is disposed on the frame 10 and is used to drive the first inspection platform 51 to move along the first direction X, so that the first inspection platform 51 switches between the first position and the second position. The first inspection platform 51 is closer to the punching module 30 when it is in the first position than in the second position. When the first inspection platform 51 is in the first position, the first inspection platform 51 is used to receive the inspection sample transferred by the punching module 30. When the first inspection platform 51 is in the second position, the first inspection platform 51 is located below the CCD camera 52 and is adjacent to the second inspection platform 53. The automatic punching device for the pole piece further includes a transfer module 80, which is disposed on the frame 10 and is located between the appearance inspection module 50 and the weighing module 40. The transfer module 80 is used to transfer the inspection sample that fails the appearance inspection by the appearance inspection module 50; or, the transfer module 80 is used to transfer the inspection sample that passes the appearance inspection by the appearance inspection module 50 to the weighing module 40. The transfer module 80 includes a fourth moving assembly 81, a second moving seat 82 and a fifth adsorption assembly 83. The fourth moving assembly 81 is arranged on the frame 10. The second moving seat 82 is connected to the fourth moving assembly 81. The fourth moving assembly 81 is used to drive the second moving seat 82 to move along the first direction X. The fifth adsorption assembly 83 is arranged on the second moving seat 82. The fifth adsorption assembly 83 is used to adsorb the test sample after the appearance inspection by the appearance inspection module 50. A second lifting drive 831 is arranged between the fifth adsorption assembly 83 and the second moving seat 82. The second lifting drive 831 is used to drive the fifth adsorption assembly 83 to move along the vertical direction Z to approach or move away from the appearance inspection module 50. The weighing module 40 includes an electronic scale 41. The electronic scale 41 is electrically connected to the control system. The control system is used to receive the weight data of the weighing module 40 and upload the weight data to the background.

[0162] The third moving assembly 55 can drive the first inspection table 51 to switch between the first position and the second position along the first direction X. The first inspection table 51 is closer to the punching module 30 in the first position than in the second position. In this way, the punching module 30 only needs to move to the first position with the inspection sample, and does not need to move to the second position. Then, the third moving assembly 55 drives the first inspection table 51 to be transported to the bottom of the CCD camera 52 for the second time, which can reduce the risk of interference between the punching module 30 and the CCD camera 52 of the appearance inspection module 50, and correspondingly shorten the movement stroke of the punching module 30 in the first direction X. The transfer module 80 can transfer the unqualified inspection samples after the appearance inspection of the appearance inspection module 50, or transfer the qualified inspection samples after the appearance inspection of the appearance inspection module 50 to the weighing module 40, so as to realize the function of transferring the inspection samples, without manual participation, and with a higher degree of automation. The transfer module 80 includes a fourth moving component 81, a second moving seat 82 and a fifth adsorption component 83. The fourth moving component 81 can drive the second moving seat 82 to move in the first direction X, and can transfer the test sample of the appearance inspection module 50 to the weighing module 40 or discharge the test sample. The fifth adsorption component 83 also uses negative pressure adsorption to adsorb and transfer the test sample, which is not easy to cause damage to the test sample, and improves the accuracy of the weighing data of the test sample on the weighing module 40. The fifth adsorption component 83 can be driven to move along the vertical direction Z by the second lifting drive 831, so as to approach or move away from the test sample on the appearance inspection module 50. The electronic scale 41 can weigh the test sample, and the electronic scale 41 is electrically connected to the control system. The control system can automatically upload the weighing data to the background without manual participation, and the data is more accurate, which reduces the workload of the staff.

[0163] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0164] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic punching and weighing device, characterized in that: include: frame; A positioning module, arranged on the frame, and used for carrying and positioning the pole piece; A punching module, arranged on the frame, for punching the electrode to obtain a test sample; A weighing module, used for weighing the test sample; Wherein, an appearance inspection module is arranged between the punching module and the weighing module, and the appearance inspection module is used to perform appearance inspection on the inspection sample.

2. The automatic punching and weighing device according to claim 1, characterized in that: At least one of the positioning module and the punching module is movably disposed on the frame.

3. The automatic punching and weighing device according to claim 2, characterized in that: The automatic punching and weighing device also includes: A first moving assembly, disposed on the frame, and used to drive the punching module to move along a first direction on the frame; The second moving component is arranged on the frame, and is used for driving the positioning module to move along a second direction on the frame, wherein the first direction, the second direction and the vertical direction are perpendicular to each other.

4. The automatic punching and weighing device according to claim 3, characterized in that: The punching module, the appearance inspection module and the weighing module are sequentially distributed along the first direction.

5. The automatic punching and weighing device according to claim 4, characterized in that: The punching module comprises: A first moving seat connected to the first moving assembly; A punching drive component mounted on the first movable seat; The punching knife is connected to the punching driving member, and the punching driving member is used to drive the punching knife to move along the vertical direction to approach or move away from the positioning module.

6. The automatic punching and weighing device according to claim 5, characterized in that: The punching module also includes: A guide assembly is arranged on the first movable seat, and the guide assembly is used to guide the punching knife to move along the vertical direction.

7. The automatic punching and weighing device according to claim 5, characterized in that: The punching module also includes: A dust removal component is arranged on the first movable seat, and the dust removal component is arranged toward the positioning module to remove dust from the pole piece on the positioning module.

8. The automatic punching and weighing device according to claim 5, characterized in that: The punching module also includes: The first adsorption component is movably disposed on the first movable seat along the vertical direction. The first adsorption component is used to adsorb the punched test sample and transfer the test sample to the appearance inspection module following the punching module.

9. The automatic punching and weighing device according to claim 5, characterized in that: The punching module also includes: A color sensor is arranged on the first movable seat. The color sensor is electrically connected to the control system. The color sensor is used to scan the entire film area of ​​the pole piece before punching the pole piece to identify the thinning area of ​​the pole piece. The control system controls the punching module to avoid the thinning area when punching the pole piece.

10. The automatic punching and weighing device according to claim 3, characterized in that: The positioning module comprises: A positioning platform connected to the second moving assembly, the positioning platform having a first bearing surface for bearing the pole piece; The second adsorption component is arranged on the positioning platform, and the second adsorption component is used to form a negative pressure on the first bearing surface to adsorb and position the pole piece.

11. The automatic punching and weighing device according to claim 3, characterized in that: The appearance detection module comprises: A first testing platform, disposed on the frame, the first testing platform having a second carrying surface for carrying the test sample; A CCD camera is arranged on the frame and located above the first detection platform. The CCD camera is electrically connected to the control system and is used to perform appearance inspection on the detection sample.

12. The automatic punching and weighing device according to claim 11, characterized in that: The appearance detection module also includes: A second testing platform, located below the CCD camera and adjacent to the first testing platform, the second testing platform having a third carrying surface for carrying the test sample; A third adsorption component is disposed on the second detection platform, and the third adsorption component is used to form a negative pressure on the third bearing surface to adsorb and position the detection sample; A flip assembly, disposed on the frame, and used to drive the second test platform to flip toward one side of the first test platform, so as to transfer the test sample on the first test platform to the third carrying surface of the second test platform by adsorption; Among them, when the second detection platform is in a flat state, the second detection platform is located on an adjacent side of the first detection platform, and the second bearing surface and the third bearing surface are both set facing the CCD camera; when the second detection platform is switched from the flat state to the flipped state, the second detection platform is flipped toward the direction of the first detection platform to the top of the first detection platform, and the third bearing surface of the second detection platform is arranged opposite to the second bearing surface of the first detection platform.

13. The automatic punching and weighing device according to claim 11, characterized in that: The first testing platform is provided with a fourth adsorption component, and the fourth adsorption component is used to form a negative pressure on the second carrying surface to adsorb and position the testing sample.

14. The automatic punching and weighing device according to claim 12, characterized in that: The appearance detection module also includes: a third moving assembly, disposed on the frame, and used for driving the first inspection table to move along the first direction, so that the first inspection table switches between a first position and a second position, and the first inspection table is closer to the punching module when it is in the first position than in the second position; Wherein, when the first testing platform is in the first position, the first testing platform is used to receive the testing sample transferred by the punching module, and when the first testing platform is in the second position, the first testing platform is located below the CCD camera and is arranged adjacent to the second testing platform.

15. The automatic punching and weighing device according to claim 1, characterized in that: The pole piece automatic punching and weighing device also includes: A transfer module is arranged on the frame and located between the appearance inspection module and the weighing module. The transfer module is used to transfer the test samples that fail the appearance inspection by the appearance inspection module; or, the transfer module is used to transfer the test samples that pass the appearance inspection by the appearance inspection module to the weighing module.

16. The automatic punching and weighing device according to claim 15, characterized in that: The transfer module comprises a fourth moving assembly, a second moving seat and a fifth adsorption assembly, wherein the fourth moving assembly is arranged on the frame, the second moving seat is connected to the fourth moving assembly, and the fourth moving assembly is used to drive the second moving seat to move along the first direction; the fifth adsorption assembly is arranged on the second moving seat, and the fifth adsorption assembly is used to adsorb the test sample after the appearance inspection by the appearance inspection module; A second lifting drive member is disposed between the fifth adsorption assembly and the second movable seat, and the second lifting drive member is used to drive the fifth adsorption assembly to move in a vertical direction so as to approach or move away from the appearance detection module.

17. The automatic punching and weighing device according to claim 1, characterized in that: The weighing module includes an electronic scale, and the electronic scale is electrically connected to a control system. The control system is used to receive weight data from the weighing module and then upload the weight data to a backend.

18. A battery manufacturing device, characterized in that: It comprises an automatic punching and weighing device according to any one of claims 1-17.

19. A method for an automatic punching and weighing device, based on the automatic punching and weighing device according to any one of claims 1 to 17, characterized in that: include: The punching module punches the pole piece to obtain a test sample, and transfers the test sample to the appearance inspection module, and the appearance inspection module inspects the appearance of the test sample.

20. The method of automatically punching and weighing a device according to claim 19, characterized in that: When the appearance inspection module inspects the appearance of the inspection sample, the appearance inspection module performs an appearance inspection on the front and back sides of the inspection sample.

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