Electrode sheet slitting system and battery production device

Abstract

An electrode sheet slitting system and a battery production device. The electrode sheet slitting system (101) comprises: a first cutting mechanism (110), configured to cut a material strip to form an electrode sheet (30) and convey the electrode sheet (30), the electrode sheet (30) comprising tabs located on two sides; a second cutting mechanism (111), configured to receive the electrode sheet (30) conveyed by the first cutting mechanism (110) and slit the electrode sheet (30) into a first electrode sheet (31) and a second electrode sheet (32), each of the first electrode sheet (31) and the second electrode sheet (32) comprising a tab located on one side; and a deviation correction mechanism (112), configured to acquire images of the first electrode sheet (31) and the second electrode sheet (32), and on the basis of the images, perform deviation correction on the position at which the material strip is cut by the first cutting mechanism (110) and / or the position at which the electrode sheet (30) is slit by the second cutting mechanism (111), such that the first electrode sheet (31) and the second electrode sheet (32) formed after deviation correction have consistent width dimensions. The electrode sheet slitting system has a simplified layout while maintaining high precision in electrode sheet slitting.

Description

Electrode slitting system and battery production equipment

[0001] Cross-references

[0002] This application incorporates Chinese Patent Application No. 202520110797.4, filed on January 17, 2025, entitled “Electrode Slitting System and Battery Production Equipment”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of battery technology, and in particular to an electrode slitting system and battery production equipment. Background Technology

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0005] In the process of preparing battery electrodes, it is usually necessary to cut large pieces of electrode material into smaller pieces that meet the size requirements.

[0006] However, in order to cut the electrode into small pieces of uniform size, the current electrode cutting system has a complex structure, resulting in a complicated layout. Summary of the Invention

[0007] This application aims to at least solve one of the technical problems existing in the background art. Therefore, one object of this application is to provide an electrode slitting system and battery production equipment to solve the aforementioned technical problem.

[0008] An embodiment of the first aspect of this application provides an electrode slitting system, comprising: a first cutting mechanism for cutting a strip of material input to the electrode slitting system to form an electrode sheet and conveying the electrode sheet, the electrode sheet including tabs located on both sides; a second cutting mechanism for receiving the electrode sheet conveyed by the first cutting mechanism and slitting the electrode sheet into a first electrode sheet and a second electrode sheet, both the first electrode sheet and the second electrode sheet including tabs located on one side; and a correction mechanism for acquiring images of the first electrode sheet and the second electrode sheet, and correcting the position of the cutting strip of the first cutting mechanism and / or correcting the position of the electrode sheet slitting mechanism of the second cutting mechanism based on the images, so that the width dimensions of the first electrode sheet and the second electrode sheet formed after correction are consistent.

[0009] In the technical solution of this application embodiment, a correction mechanism is set up to correct the first cutting mechanism and / or the second cutting mechanism based on the actual images of the first and second electrodes that have been cut. This can improve the accuracy of electrode cutting. Furthermore, compared to using different correction mechanisms to correct the position of the cutting strip of the first cutting mechanism and the position of the electrode cut by the second cutting mechanism, only one correction mechanism is needed to correct the position of the cutting strip of the first cutting mechanism and the position of the electrode cut by the second cutting mechanism based on the same image of the first and second electrodes. This simplifies the structure and layout of the electrode cutting system.

[0010] In some embodiments, the strip includes a first portion and a second portion located on opposite sides of the first portion. The first portion has an identification layer near the edge of the second portion. A first cutting mechanism is used to cut the second portion to form an electrode tab. A second cutting mechanism is used to cut the electrode sheet along the centerline of the first portion to form a first electrode sheet and a second electrode sheet. The portion of the first portion other than the identification layer is used to form the main body portion of the first electrode sheet and the second electrode sheet respectively. The electrode tab is located on one side of the main body portion. A correction mechanism is used to obtain the first width of the identification layer in the first electrode sheet and the second electrode sheet respectively based on the image, and to correct the position of the first cutting mechanism cutting the strip based on the difference between the two first widths. It is also used to obtain the second width of the main body portion in the first electrode sheet and the second electrode sheet respectively based on the image, and to correct the position of the second cutting mechanism cutting the electrode sheet based on the difference between the two second widths. This allows the correction mechanism to determine, based on the images of the first and second electrodes, whether it is necessary to correct the position of the material strip cut by the first cutting mechanism or the position of the electrode slitting mechanism by the second cutting mechanism. This enables a single correction mechanism to correct the first and / or second cutting mechanisms based on the same image, simplifying the layout of the electrode slitting system.

[0011] In some embodiments, the correction mechanism includes: a visual inspection device disposed on the side of the second cutting mechanism away from the first cutting mechanism, for acquiring images of the first and second electrodes; a correction device for transmitting the material strip input to the electrode slitting system to the first cutting mechanism; and a controller for receiving the images. The controller is also used to control the correction device to adjust the transmission direction of the material strip based on the images. Thus, the controller can adjust the positional relationship between the first or second cutting mechanism and the material strip by controlling the transmission direction of the material strip, thereby correcting the deviation of the first or second cutting mechanism and improving the accuracy of electrode slitting.

[0012] In some embodiments, the correction device includes: a correction roller for conveying the material belt; a sensor disposed corresponding to a first portion of the material belt for detecting the position of a first edge of the marking layer away from a second portion; and a controller for controlling the rotation of the correction roller based on an image and the position of the first edge detected by the sensor to adjust the conveying direction of the material belt. The sensor detects the position of the first edge of the marking layer to locate the current position of the material belt, and the controller, based on the image and the current position of the material belt, controls the rotation of the correction roller to adjust the conveying direction of the material belt, thereby adjusting the position of the material being cut by the first cutting mechanism or the position of the electrode being slit by the second cutting mechanism, thus achieving correction.

[0013] In some embodiments, the first cutting mechanism includes a laser cutting device for cutting the strip using a laser. A controller controls the position of the laser beam emitted by the laser cutting device to correct the position of the cut strip. The controller also controls the correction device to adjust the conveying direction of the strip to correct the position of the electrode pieces cut by the second cutting mechanism. Thus, when only the position of the strip cut by the first cutting mechanism needs correction, only the position of the laser beam needs to be adjusted, without adjusting the conveying direction of the strip. This ensures that the position of the electrode pieces cut by the second cutting mechanism remains unchanged and does not affect the cutting accuracy of the electrode pieces. When adjusting the conveying direction of the strip to correct the position of the electrode pieces cut by the second cutting mechanism, the position of the laser beam can also be adjusted in conjunction with the first cutting mechanism to maintain a constant relative position with the strip. This allows the same correction mechanism to correct the positions of both the first and second cutting mechanisms.

[0014] In some embodiments, the visual inspection device includes a macro camera. The macro camera is small in size, enabling the acquisition of images of the first and second electrodes without occupying excessive space, further simplifying the layout of the electrode slitting system.

[0015] In some embodiments, the electrode slitting system further includes: an unwinding mechanism disposed on the side of the first cutting mechanism away from the second cutting mechanism, for unwinding the strip input to the electrode slitting system and conveying it to the first cutting mechanism; a first driving mechanism for driving the unwound strip to be conveyed to the first cutting mechanism; and a winding mechanism disposed on the side of the second cutting mechanism away from the first cutting mechanism for winding the first and second electrodes. By setting the first driving mechanism to drive the unwound strip to be conveyed to the first cutting mechanism, the strip maintains a certain tension during transmission, which helps to control the cutting position of the strip by the first cutting mechanism and the slitting position of the strip by the second cutting mechanism to meet expectations, thereby improving the slitting accuracy of the electrodes.

[0016] In some embodiments, the first driving mechanism includes: a first mounting structure; a first driving roller rotatably mounted on the first mounting structure; a first pressure roller rotatably mounted on the first mounting structure and disposed opposite to the first driving roller to define a first pressing gap; an unwinding mechanism for conveying the material strip to the first pressing gap; and the first driving roller for rotating to drive the material strip through the first pressing gap to be conveyed to the first cutting mechanism. The first pressing gap allows for limiting the conveying direction of the material strip while driving its conveying, ensuring that the conveying direction of the material strip conforms to expectations. This facilitates controlling the position of the material strip cut by the first cutting mechanism and the position of the material strip slit by the second cutting mechanism to conform to expectations, thereby improving the slitting accuracy of the electrode sheets.

[0017] In some embodiments, the electrode slitting system further includes a second driving mechanism disposed between the second cutting mechanism and the winding mechanism. The second driving mechanism drives the first and second electrodes to be conveyed to the winding mechanism. This ensures that the first and second electrodes output by the second cutting mechanism maintain a certain tension, which helps improve the flatness of the first and second electrodes during winding by the winding mechanism. Furthermore, the second driving mechanism can cooperate with the first driving mechanism to maintain a certain tension in the strip throughout the entire transmission process, which helps to further control the cutting position of the strip by the first cutting mechanism and the slitting position of the strip by the second cutting mechanism to meet expectations.

[0018] In some embodiments, the second driving mechanism includes: two second mounting structures; two second driving rollers rotatably mounted on the two second mounting structures respectively; and two second pressure rollers rotatably mounted on the two second mounting structures respectively, and disposed opposite to the second driving rollers on their respective second mounting structures to define a second pressing gap with the second driving rollers. The second driving rollers are used to rotate to drive the first electrode sheet and the second electrode sheet to be conveyed to the winding mechanism via the corresponding second pressing gap. The second pressing gap allows for limiting the conveying direction of the electrode sheet while driving its conveying, ensuring that the conveying direction of the strip electrode sheet conforms to expectations. This improves the flatness of the winding mechanism in winding the first and second electrode sheets, and also helps to control the cutting position of the first cutting mechanism and the slitting position of the second cutting mechanism to conform to expectations.

[0019] In some embodiments, the electrode slitting system further includes a tension adjusting mechanism for adjusting the tension of the first and second electrodes output by the second cutting mechanism before conveying them to the second driving mechanism. This can, to some extent, avoid the problem of poor driving effect of the second driving mechanism on the first and second electrodes due to insufficient tension of the first and second electrodes output by the second cutting mechanism, and also to some extent avoid the problem of tape breakage during the driving of the first and second electrodes by the second driving mechanism due to excessive tension of the first and second electrodes output by the second cutting mechanism, thus maintaining a tension balance between the first and second driving mechanisms.

[0020] In some embodiments, the tension adjustment mechanism includes: two tension adjustment components, each used to adjust the tension of a first electrode and a second electrode, respectively. Each tension adjustment component includes: a third mounting structure; at least one tension adjustment roller for conveying the first electrode or the second electrode; a mounting portion movably mounted on the third mounting structure along a first direction, with the tension adjustment roller rotatably mounted on the mounting portion, the first direction being perpendicular to the extension direction of the tension adjustment roller; and a tension adjustment controller for controlling the mounting portion to move along the first direction to drive the tension adjustment roller to move along the first direction, thereby adjusting the distance between the tension adjustment roller and the second drive mechanism. When the tension of the first electrode or the second electrode is too high, the tension of the first electrode or the second electrode transmitted between the tension adjustment roller and the second drive mechanism is too high. Based on this, the distance between the tension adjustment roller and the second drive mechanism can be reduced to decrease the tension of the first electrode or the second electrode. Conversely, when the tension of the first electrode or the second electrode transmitted between the tension adjustment roller and the second drive mechanism is too loose, the distance between the tension adjustment roller and the second drive mechanism can be increased to tighten the first electrode or the second electrode. By driving the tension adjusting roller to move along the first direction, the tension of the first and second electrode sheets conveyed between the second cutting mechanism and the second driving mechanism can be adjusted, thereby realizing the adjustment of the tension of the first and second electrode sheets.

[0021] In some embodiments, the unwinding mechanism includes: a first unwinding structure and a second unwinding structure arranged at intervals, both of which are used to load material strips; and an unwinding and rewinding structure for rewinding the material strips loaded in the first and second unwinding structures, so that one of the first and second unwinding structures unwinds the material strip to the first cutting mechanism. This allows the unwinding mechanism to have one unit on standby, helping to shorten the waiting time for material loading in the unwinding mechanism and improve the efficiency of the electrode slitting system in slitting electrodes.

[0022] In some embodiments, the winding mechanism includes a first winding assembly and a second winding assembly; wherein the first winding assembly includes: a first winding structure and a second winding structure arranged at intervals, both of which are used to wind up the first electrode sheet, and a first winding-and-changing structure for controlling one of the first and second winding structures to wind up the first electrode sheet; the second winding assembly includes: a third winding structure and a fourth winding structure arranged at intervals, both of which are used to wind up the second electrode sheet, and a second winding-and-changing structure for controlling one of the third and fourth winding structures to wind up the second electrode sheet. This allows the winding mechanism to have one backup and one standby, helping to shorten the material winding time of the winding mechanism and improve the efficiency of the electrode sheet slitting system in slitting the electrode sheets.

[0023] An embodiment of the second aspect of this application provides a battery manufacturing apparatus, which includes the electrode slitting system described in the above embodiments.

[0024] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0025] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0026] Figure 1 is an exploded structural diagram of a battery according to some embodiments of this application;

[0027] Figure 2 is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0028] Figure 3 is a functional block diagram of an electrode slitting system according to some embodiments of this application;

[0029] Figure 4 is a schematic diagram of the material strip structure of some embodiments of this application;

[0030] Figure 5 is a schematic diagram of the structure of the electrode sheet in some embodiments of this application;

[0031] Figure 6 is a schematic diagram of the structure of an electrode slitting system according to some embodiments of this application;

[0032] Figure 7 is a schematic diagram of the structure of the first drive mechanism according to some embodiments of this application;

[0033] Figure 8 is a structural schematic diagram of a tension adjustment assembly according to some embodiments of this application. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0040] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0043] In the electrode production process, large sheets of electrode material typically need to be slit to obtain smaller electrode pieces that meet size requirements. For example, an electrode slitting system may include a die-cutting mechanism and a slitting mechanism. The die-cutting mechanism is used to cut the material strip into large electrode pieces, and the slitting mechanism is used to divide the large electrode pieces in half to form smaller electrode pieces. To ensure that the width of the divided electrode pieces is equal, a correction device is added before both the die-cutting and slitting mechanisms to correct their respective deviations. This results in a large number of components, a complex layout, and a relatively large size in the electrode slitting system.

[0044] Furthermore, because the alignment device before the slitting mechanism is located between the die-cutting and slitting mechanisms, the distance between the two mechanisms is relatively large, resulting in a lag in alignment adjustment. That is, after alignment by the die-cutting mechanism, the electrode sheet still needs to be transported a considerable distance from the die-cutting mechanism to the slitting mechanism. During this transport process, deviations may occur in the transmission of the electrode sheet, causing its position at the slitting mechanism to deviate from the expected position, and consequently, causing a deviation in the slitting position of the electrode sheet by the slitting mechanism.

[0045] Based on the above considerations, an electrode slitting system was designed, including a first cutting mechanism, a second cutting mechanism, and a correction mechanism. The first cutting mechanism cuts the material strip to form electrode sheets, and then conveys the material to the second cutting mechanism, which slits the electrode sheets to form first and second electrode sheets. The correction mechanism corrects the first and / or second cutting mechanisms based on the actual images of the slit first and second electrode sheets, thereby improving the accuracy of electrode slitting. Furthermore, compared to using different correction mechanisms to correct the cutting position of the material strip by the first cutting mechanism and the cutting position of the electrode sheets by the second cutting mechanism, only one correction mechanism is needed to correct both the cutting position of the material strip by the first cutting mechanism and the cutting position of the electrode sheets by the second cutting mechanism based on the same image of the first and second electrode sheets. This simplifies the structure and layout of the electrode slitting system.

[0046] Furthermore, since the second cutting mechanism directly receives the electrode sheet fed by the first cutting mechanism, that is, the second cutting mechanism is directly arranged after the first cutting mechanism, the transmission distance of the electrode sheet between the first cutting mechanism and the second cutting mechanism can be shortened. This improves the problem of lag adjustment in the correction caused by the long distance between the slitting mechanism and the die-cutting mechanism, and improves the correction accuracy, thereby further improving the accuracy of slitting the electrode sheet.

[0047] Electrodes can be prepared using the electrode slitting system of the embodiments of this application, and the electrodes can be used to form batteries.

[0048] Please refer to Figure 1, which is an exploded structural diagram of a battery provided in some embodiments of this application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20, and the housing 10 can adopt various structures. In some embodiments, the housing 10 may include a first part 11 and a second part 12, which overlap each other, and the first part 11 and the second part 12 together define a space for accommodating the battery cell 20.

[0049] In battery 100, there can be multiple battery cells 20, which can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Battery 100 may also include other structures, such as a busbar component for electrical connection between multiple battery cells 20.

[0050] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0051] Please refer to Figure 2, which is an exploded structural diagram of a battery cell provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up a battery. As shown in Figure 2, the battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components. The end cap 21 may be provided with functional components such as electrode terminals 21a. The electrode terminals 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy into the battery cell 20.

[0052] The housing 22 is an assembly used to fit the end cap 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components.

[0053] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. Parts of the positive and negative electrode sheets have active material, while the non-active parts of the positive and negative electrode sheets each constitute a tab 23a. The positive and negative tabs can be located together at one end of the positive and negative electrode sheets or at opposite ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals to form a current loop.

[0054] In the embodiments of this application, the first electrode can be used as a positive electrode or a negative electrode, and the second electrode can be used as a positive electrode or a negative electrode.

[0055] Referring to Figure 3, this application embodiment provides an electrode slitting system 101, including: a first cutting mechanism 110, used to cut the material strip input to the electrode slitting system 101 to form an electrode 30 and to transport the electrode 30, the electrode 30 including electrode tabs located on both sides; a second cutting mechanism 111, used to receive the electrode 30 transported by the first cutting mechanism 110 and to slit the electrode 30 into a first electrode 31 and a second electrode 32, the first electrode 31 and the second electrode 32 both including electrode tabs located on one side; and a correction mechanism 112, used to acquire images of the first electrode 31 and the second electrode 32, and to correct the position of the material strip cut by the first cutting mechanism 110 and / or correct the position of the electrode 30 slit by the second cutting mechanism 111 based on the images, so that the width dimensions of the first electrode 31 and the second electrode 32 formed after correction are consistent.

[0056] The material strip may include a current collector and an active material layer located on a portion of the surface of the current collector.

[0057] The current collector may include metallic materials; for example, the current collector may include materials such as aluminum, copper, and lithium metal.

[0058] The active material layer may include polymeric materials, conductive materials, etc. Polymeric materials may include, but are not limited to, rubber and plastics. Conductive materials may include, but are not limited to, metallic materials, semiconductor conductive materials, and polymeric conductive materials.

[0059] The active material layer may include, but is not limited to, one of a positive electrode active material layer and a negative electrode active material layer. Both the positive and negative electrode active material layers can react with the electrolyte to charge the battery. The positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, while the negative electrode active material may be carbon or silicon, etc. After forming the first electrode 31 or the second electrode 32, the strip with the positive electrode active material layer can be used to form the positive electrode; similarly, after forming the first electrode 31 or the second electrode 32, the strip with the negative electrode active material layer can be used to form the negative electrode.

[0060] In some embodiments, both surfaces of the strip may have an active material layer. In other embodiments, only one surface of the strip may have an active material layer.

[0061] The first cutting mechanism 110 can cut the portion of the material strip that does not have an active material layer to form the tabs of the electrode sheet 30. The tabs are located on both sides of the electrode sheet 30. Exemplarily, the first cutting mechanism 110 can perform die cutting on the material strip, which refers to cutting the material strip into the electrode sheet 30 according to a predetermined shape.

[0062] The first cutting mechanism 110 directly conveys the electrode sheet 30 to the second cutting mechanism 111, which can cut the electrode sheet 30 along its centerline to form a first electrode sheet 31 and a second electrode sheet 32. The centerline referred to here is perpendicular to the arrangement direction of the tabs on both sides of the electrode sheet 30, so that both the first electrode sheet 31 and the second electrode sheet 32 ​​include a tab located on one side. Exemplarily, both the first electrode sheet 31 and the second electrode sheet 32 ​​include a main body portion, with the tab located on one side of the main body portion. The surface of the main body portion has an active material layer, while the surface of the tab does not have an active material layer.

[0063] The images of the first electrode 31 and the second electrode 32 show the surfaces of the first electrode 31 and the second electrode 32, so as to show the complete images of the tabs and the main body of the first electrode 31 and the second electrode 32.

[0064] The width dimensions of the first electrode 31 and the second electrode 32 are the same as those of the second electrode 32 in the direction from the main body to the tab. The maximum width of the first electrode 31 and the second electrode 32 are the same, and the minimum width is also the same. Specifically, the width dimension of the tab of the first electrode 31 is the same as the width dimension of the tab of the second electrode 32, and the width dimension of the main body of the first electrode 31 is the same as the width dimension of the main body of the second electrode 32.

[0065] As described above, the first cutting mechanism 110 is used to cut out the tabs, and the second cutting mechanism 111 is used to cut the electrode sheet 30 except for the tabs. That is, the cutting positions of the material strip by the first cutting mechanism 110 and the second cutting mechanism 111 are different. Based on this, the correction mechanism 112 can obtain the shape and size of the positions cut by the first cutting mechanism 110 and the second cutting mechanism 111 in the first electrode sheet 31 and the second electrode sheet 32 ​​respectively based on the same image of the first electrode sheet 31 and the second electrode sheet 32, so as to correct the cutting position of the material strip by the first cutting mechanism 110 and the cutting position of the electrode sheet 30 by the second cutting mechanism 111 respectively.

[0066] The correction mechanism 112 corrects the position of the cutting strip of the first cutting mechanism 110 and / or corrects the position of the slitting electrode 30 of the second cutting mechanism 111 so that the width dimensions of the first electrode 31 and the second electrode 32 formed after correction are consistent. This means that the electrode 30 mechanism can correct only the position of the cutting strip of the first cutting mechanism 110 to make the width dimensions of the first electrode 31 and the second electrode 32 consistent; it can also correct only the position of the slitting electrode 30 of the second cutting mechanism 111 to make the width dimensions of the first electrode 31 and the second electrode 32 consistent; or it can correct the position of the cutting strip of the first cutting mechanism 110 and the position of the slitting electrode 30 of the second cutting mechanism 111 to make the width dimensions of the first electrode 31 and the second electrode 32 consistent. The specific correction method needs to be determined based on the images of the first electrode 31 and the second electrode 32.

[0067] For example, if it is determined from the images of the first electrode 31 and the second electrode 32 that the widths of the tabs of the first electrode 31 and the second electrode 32 are inconsistent, but the widths of the remaining portions are consistent, then the correction mechanism 112 corrects the position of the cutting strip by the first cutting mechanism 110. If it is determined from the images of the first electrode 31 and the second electrode 32 that the widths of the portions of the first electrode 31 and the second electrode 32 other than the tabs are inconsistent, but the widths of the tabs are consistent, then the correction mechanism 112 corrects the position of the cutting strip by the second cutting mechanism 111. If it is determined from the images of the first electrode 31 and the second electrode 32 that the widths of both the tabs and the portions other than the tabs are inconsistent, then the correction mechanism 112 corrects the position of the cutting strip by the first cutting mechanism 110 and the position of the cutting strip by the second cutting mechanism 111.

[0068] In the above technical solution, the correction mechanism 112 corrects the first cutting mechanism 110 and / or the second cutting mechanism 111 based on the actual images of the first electrode 31 and the second electrode 32 that have already been cut, thereby improving the cutting accuracy of the electrode 30. Furthermore, compared to using different correction mechanisms 112 to correct the position of the material strip cut by the first cutting mechanism 110 and the position of the electrode 30 cut by the second cutting mechanism 111 respectively, only one correction mechanism 112 is needed to correct both the position of the material strip cut by the first cutting mechanism 110 and the position of the electrode 30 cut by the second cutting mechanism 111 based on the same image of the first electrode 31 and the second electrode 32. In other words, the same image can be used to indicate whether to correct the first cutting mechanism 110 and the second cutting mechanism 111, without the need to use two correction mechanisms 112 to detect the electrode 30 output by the first cutting mechanism 110 and the first electrode 31 and the second electrode 32 output by the second cutting mechanism 111, respectively. This allows the first cutting mechanism 110 and the second cutting mechanism 111 to share the same correction mechanism 112, simplifying the structure of the electrode cutting system 101 and reducing its layout.

[0069] Furthermore, since the second cutting mechanism 111 directly receives the electrode sheet 30 conveyed by the first cutting mechanism 110, it can shorten the transmission distance of the electrode sheet 30 between the first cutting mechanism 110 and the second cutting mechanism 111, reduce the probability of deviation during the transmission of the electrode sheet 30 from the first cutting mechanism 110 to the second cutting mechanism 111, thereby improving the problem of lag adjustment in the correction due to the long distance between the slitting mechanism and the die-cutting mechanism, improving the correction accuracy, and further improving the accuracy of slitting the electrode sheet 30.

[0070] Referring to Figures 4 and 5, according to some embodiments of this application, the material strip includes a first portion 301 and a second portion 302 located on opposite sides of the first portion 301. An identification layer 303 is provided on the edge of the first portion 301 near the edge of the second portion 302. A first cutting mechanism 110 is used to cut the second portion 302 to form an electrode tab 23a. A second cutting mechanism 111 is used to cut the electrode sheet 30 along the centerline of the first portion 301 to form a first electrode sheet 31 and a second electrode sheet 32. The portion of the first portion 301 other than the identification layer 303 is used to respectively form… The main body portions of the first electrode 31 and the second electrode 32 have tabs 23a located on one side of the main body portions. The correction mechanism 112 is used to obtain the first width W1 of the identification layer 303 in the first electrode 31 and the second electrode 32 based on the image, and to correct the position of the cutting strip of the first cutting mechanism 110 based on the difference between the two first widths W1. It is also used to obtain the second width W2 of the main body portions in the first electrode 31 and the second electrode 32 based on the image, and to correct the position of the cutting electrode 30 of the second cutting mechanism 111 based on the difference between the two second widths W2.

[0071] The two second portions 302 can be the same size. An active material layer can be disposed on the surface of the first portion 301 to form the main body of the first electrode 31 and the second electrode 32. The second portion 302 does not have an active material layer to form the tab 23a.

[0072] Since there are two second parts 302, there are also two identification layers 303 on the first part 301. The two identification layers 303 are spaced apart and located at the two edges of the first part 303 near the second part 301. The material of the identification layers 303 can be an insulating material, and the edges of the two identification layers 303 that are far apart from each other coincide with the boundary line between the first part 301 and the second part 302.

[0073] The first width W1 and the second width W2 are both widths of the first electrode 31 and the second electrode 32 in the direction from the tab 23a toward the main body.

[0074] The first cutting mechanism 110 can cut along the cutting lines of the material strip. The cutting lines may include alternating first and second cutting lines. The first cutting line forms the shape of the tab 23a, and the second cutting line coincides with the marking layer 303. It is understood that the first cutting mechanism 110 typically cuts the material strip according to a pre-designed template. Simply aligning the template with the cutting lines of the material strip is sufficient to cut the desired shape. For example, the first cutting mechanism 110 may include a die-cutting blade, which can be used to assemble a die-cutting plate according to the shape of the cutting lines of the material strip. Alternatively, the first cutting mechanism 110 may include a laser cutting device. The laser beam emitted by the laser cutting device follows the same direction as the cutting lines, and the distance between the two laser beams corresponding to the two cutting lines is the same as the distance between the two cutting lines.

[0075] If the template is not aligned with the cutting line, for example, if the template is offset to the right relative to the strip, the first cutting mechanism 110 will cut the marking layer 303 on the left side of the strip but not the marking layer 303 on the right side. If the template is offset to the left relative to the strip, the first cutting mechanism 110 will cut the marking layer 303 on the right side of the strip but not the marking layer 303 on the left side. This will result in the two marking layers 303 having inconsistent shapes and sizes.

[0076] Therefore, by obtaining the difference between the first width W1 of the marking layer 303 of the first electrode 31 and the second electrode 32, it can be determined whether the position of the cutting strip of the first cutting mechanism 110 needs to be corrected. If the difference between the two first widths W1 is 0, then the position of the cutting strip of the first cutting mechanism 110 does not need to be corrected; if the difference between the two first widths W1 is not 0, then the position of the cutting strip of the first cutting mechanism 110 needs to be corrected.

[0077] An active material layer is provided on the surface of the first part 301 that does not have the marking layer 303. The tabs 23a on both sides of the electrode 30 are located on both sides of the center line of the first part 301 (as shown by the dotted line in Figure 5), and the two marking layers 303 are symmetrically distributed along the center line of the first part 301. In this way, after the cutter of the second cutting mechanism 111 cuts along the center line of the first part 301, the first part 301 is divided into two parts of equal width. The part of each part, excluding the marking layer 303, constitutes the main body of the first electrode 31 or the second electrode 32 due to the presence of the active material layer. Since the width of the two marking layers 303 is the same, the width of the main body of the formed first electrode 31 and second electrode 32 is the same.

[0078] Therefore, if the second cutting mechanism 111 does not cut along the centerline of the first portion 301, the second widths W2 of the main bodies of the first electrode 31 and the second electrode 32 will be inconsistent. Based on this, by obtaining the difference between the second widths W2 of the main bodies of the first electrode 31 and the second electrode 32, it can be determined whether the position of the electrode 30 cut by the second cutting mechanism 111 needs to be corrected. If the difference between the two second widths W2 is 0, then there is no need to correct the position of the electrode 30 cut by the second cutting mechanism 111; if the difference between the two second widths W2 is not 0, then the position of the electrode 30 cut by the second cutting mechanism 111 needs to be corrected.

[0079] In the above technical solution, the correction mechanism 112 can determine whether it is necessary to correct the position of the cutting strip of the first cutting mechanism 110 or the position of the cutting electrode 30 of the second cutting mechanism 111 based on the images of the first electrode 31 and the second electrode 32. This enables a correction mechanism 112 to correct the first cutting mechanism 110 and / or the second cutting mechanism 111 based on the same image, thus simplifying the layout of the electrode cutting system 101.

[0080] Referring to FIG6, according to some embodiments of the present application, the correction mechanism 112 includes: a visual inspection device 1121, disposed on the side of the second cutting mechanism 111 away from the first cutting mechanism 110, for acquiring images of the first electrode 31 and the second electrode 32; a correction device 1122, for transmitting the material strip 29 input to the electrode slitting system 101 to the first cutting mechanism 110; a controller, for receiving images; the controller is also used to control the correction device 1122 to adjust the transmission direction of the material strip 29 based on the images.

[0081] The visual inspection device 1121 can detect the first electrode 31 and the image of the second electrode 32, respectively. The controller receives the image of the first electrode 31 and the image of the second electrode 32, and obtains the first width of the identifier layer 303 and the second width of the main body of the first electrode 31 based on the image of the first electrode 31, and obtains the first width of the identifier layer 303 and the second width of the main body of the second electrode 32 based on the image of the second electrode 32. The controller also determines whether the position of the cutting strip 29 of the first cutting mechanism 110 needs to be corrected based on the difference between the two first widths and the difference between the two second widths, and determines whether the position of the slitting strip 29 of the second cutting mechanism 111 needs to be corrected based on the difference between the two second widths.

[0082] In some embodiments, the controller may integrate image processing software to perform size measurement functions in the image. The image processing software may be any computer program software known to those skilled in the art capable of extracting the edges of the tabs 23a of the first electrode 31 and the second electrode 32 and the edges of the main body portion in the image and obtaining the aforementioned first width and second width.

[0083] In some embodiments, the controller can perform various mathematical operations through built-in mathematical functions and instructions, thereby obtaining the difference between the two first widths and the difference between the two second widths.

[0084] In some embodiments, the controller can determine the data through internal logic operations, thereby controlling the correction device 1122, the first cutting mechanism 110 and the second cutting mechanism 111 based on the difference between the two first widths and the difference between the two second widths.

[0085] In some embodiments, the controller may be a PLC (Programmable Logic Controller).

[0086] Understandably, the correction device 1122 is used to transport the strip 29 to the first cutting mechanism 110, which then transports the electrode sheet 30 formed from the cut strip 29 to the second cutting mechanism 111. If the correction device 1122 adjusts the transport direction of the strip 29, the positional relationship between the first cutting mechanism 110 and the strip 29 will change, resulting in a change in the transport direction of the electrode sheet 30 output by the first cutting mechanism 110. Consequently, the relative position between the second cutting mechanism 111 and the electrode sheet 30 will also change. In other words, adjusting the transport direction of the strip 29 by the correction device 1122 will cause changes in the relative positions between the first and second cutting mechanisms 111 and the electrode sheet 30. This can lead to changes in the cutting position of the first cutting mechanism 110 on the strip 29 or the slitting position of the second cutting mechanism 111 on the electrode sheet 30, which would otherwise not require correction, thus resulting in a decrease in slitting accuracy.

[0087] Based on the above considerations, in some embodiments, the controller can control the first cutting mechanism 110 to correct the position of the cutting strip 29 based on an image, and can also control the correction device 1122 to adjust the transmission direction of the strip 29 based on an image, so as to correct the position of the slit electrode 30 cut by the second cutting mechanism 111. In other embodiments, the controller can control the correction device 1122 to adjust the transmission direction of the strip 29 based on an image, so as to correct the position of the cutting strip 29 cut by the first cutting mechanism 110, and can also control the second cutting mechanism 111 to correct the position of the slit electrode 30 based on an image.

[0088] In one feasible embodiment of this application, when the position of the cutting strip 29 by the first cutting mechanism 110 deviates, the controller directly controls the first cutting mechanism 110 to correct the position of the cutting strip 29. When the position of the cutting electrode 30 by the second cutting mechanism 111 deviates, the controller controls the correction device 1122 to adjust the transmission direction of the strip 29 to correct the position of the cutting electrode 30 by the second cutting mechanism 111. In this way, when the position of the cutting strip 29 by the first cutting mechanism 110 is corrected, the position of the cutting electrode 30 by the second cutting mechanism 111 will not change. When the correction device 1122 adjusts the transmission direction of the strip 29 to correct the position of the electrode sheet 30 cut by the second cutting mechanism 111, the positional relationship between the cutting template of the first cutting mechanism 110 and the strip 29 will also change accordingly. However, since the controller can directly control the first cutting mechanism 110 to correct the position of the cutting strip 29, it is only necessary to adjust the transmission direction of the strip 29 and simultaneously control the cutting template of the first cutting mechanism 110 to shift in the same direction relative to the strip 29 by the same amount. For example, the controller can simultaneously control the correction device 1122 to shift the strip 29 1 mm to the left and the cutting template of the first cutting mechanism 110 to the left by 1 mm, so that the cutting template of the first cutting mechanism 110 moves with the strip 29, thereby achieving the goal of correcting the position of the electrode sheet 30 cut by the second cutting mechanism 111 while keeping the position of the cutting strip 29 of the first cutting mechanism 110 unchanged.

[0089] In another feasible embodiment of this application, when the position of the cutting strip 29 of the first cutting mechanism 110 deviates, the controller controls the correction device 1122 to adjust the transmission direction of the strip 29 to correct the position of the cutting strip 29 of the first cutting mechanism 110. When the position of the cutting electrode 30 of the second cutting mechanism 111 deviates, the controller directly controls the second cutting mechanism 111 to correct the position of the cutting electrode 30. In this way, when the position of the cutting electrode 30 of the second cutting mechanism 111 is corrected, the position of the cutting strip 29 of the first cutting mechanism 110 will not change. When controlling the correction device 1122 to adjust the transmission direction of the strip 29 to correct the position of the cutting strip 29 of the first cutting mechanism 110, the cutting template of the second cutting mechanism 111 can be controlled to deviate by the same amount in the same direction relative to the electrode 30. For example, the controller can simultaneously control the correction device 1122 to adjust the material strip 29 to shift 1mm to the left, and the cutting template of the second cutting mechanism 111 to shift 1mm to the left, so that the cutting template of the second cutting mechanism 111 moves simultaneously with the electrode 30. This achieves the goal of correcting the position of the material strip 29 cut by the first cutting mechanism 110 while keeping the position of the electrode 30 cut by the second cutting mechanism 111 unchanged.

[0090] In the above technical solution, the controller can adjust the positional relationship between the first or second cutting mechanism and the material belt by controlling the transmission direction of the material belt, thereby correcting the deviation of the first or second cutting mechanism and improving the accuracy of cutting the electrode sheets.

[0091] According to some embodiments of this application, the correction device 1122 includes: a correction roller for conveying the material belt 29; a sensor disposed corresponding to a first portion 301 of the material belt 29 for detecting the position of a first edge of the marking layer 303 away from a second portion 302; and a controller for controlling the rotation of the correction roller based on an image and the position of the first edge detected by the sensor to adjust the transmission direction of the material belt 29.

[0092] In other words, the first edge is the edge where the two second parts are far apart from each other.

[0093] The controller controls the correction roller to rotate at a certain angle, so that the transmission direction of the material belt 29 is at an angle to the transmission direction of the material belt 29 when the correction roller is not rotating, thereby changing the transmission direction of the material belt 29.

[0094] Two sensors can be used to detect the positions of the first edges of the two marking layers respectively. The controller determines the correction value of the strip 29 based on the image. The sensors detect the position of the first edge of the first strip 29 to use the position of the first edge as a reference position for correction. Based on the correction value and the position of the first edge, the controller controls the correction roller to rotate at a certain angle to adjust the position of the first edge in the first cutting mechanism 110 or the second cutting mechanism 111. After correction, the offset between the position of the first edge detected by the sensor and the position of the first edge detected by the sensor before correction is exactly equal to the correction value determined by the controller, so that the first cutting mechanism 110 can cut the strip 29 along the cutting line of the strip 29, and the position of the cutter of the second cutting mechanism 111 can be aligned with the center line of the first part 301.

[0095] The correction value can be the difference between the first width of the marking layer 303 of the first electrode 31 and the second electrode 32, or the difference between the second width of the main body of the first electrode 31 and the second electrode 32. The controller can convert the difference between the first width and the difference between the second width into the rotation angle of the correction roller through the built-in mathematical function.

[0096] In some embodiments, the number of correction rollers can be two, and the two correction rollers can be arranged in parallel to improve the control capability of the conveying direction of the material belt 29.

[0097] In some embodiments, the sensor may include a photoelectric sensor, which can detect the position of the first edge by utilizing changes in the intensity of reflected light. There may be two photoelectric sensors, spaced apart, each corresponding to one of the two first edges. Because the materials of the marking layer 303 and the first portion 301 on both sides of the first edge are different, the intensity of light reflected from the marking layer 303 and the first portion 301 on both sides of the first edge is different, thus enabling the detection of the position of the first edge.

[0098] In the above technical solution, the sensor detects the position of the first edge of the marking layer 303 to locate the position of the current material strip 29. Based on the image and the position of the current material strip 29, the controller controls the rotation of the correction roller to adjust the transmission direction of the material strip 29, thereby adjusting the position of the first cutting mechanism 110 cutting the material or adjusting the position of the second cutting mechanism 111 slitting the electrode sheet 30 to achieve correction.

[0099] It is understood that in other embodiments, the correction device 1122 may also be other structures known to those skilled in the art that can adjust the transmission direction of the strip 29 based on the correction value.

[0100] As shown in Figure 6, according to some embodiments of this application, the first cutting mechanism 110 includes a laser cutting device, which is used to cut the strip 29 with a laser. The controller is used to control the position of the laser light path emitted by the laser cutting device to correct the position of the cut strip 29. The controller is also used to control the correction device 1122 to adjust the transmission direction of the strip 29 to correct the position of the second cutting mechanism 111 cutting the electrode 30.

[0101] The laser cutting device may include a servo motor, a laser, and a laser cutting head. The controller is connected to the servo motor and is used to control the servo motor to drive the laser cutting head to move along a predetermined route, for example, it can move along a pre-set cutting line of the strip 29. The laser generates laser light and emits it through the laser cutting head. As the laser cutting head moves, it cuts the strip 29.

[0102] Servo motors, lasers, and laser cutting heads have the same meaning as commonly understood by those skilled in the art.

[0103] The controller can send commands to the servo motor, causing the servo motor to drive the laser cutting head to move along a predetermined path. Sending commands to the servo motor to control the laser cutting head to move along a predetermined path is a common practice among those skilled in the art and will not be elaborated upon here.

[0104] The controller obtains the difference in the first width of the two identification layers 303 based on the images of the first electrode 31 and the second electrode 32 as the correction value, and sends the instruction with the correction value to the servo motor so that the servo motor controls the laser cutting head to move the correction value on the original predetermined path, so that the laser optical path moves the correction value as a whole, thereby correcting the position of the cutting strip 29.

[0105] Understandably, when the second cutting mechanism 111 needs to correct the position of the slitting electrode 30, but the first cutting mechanism 110 does not need to correct the position of the cutting strip 29, the controller controls the correction device 1122 to adjust the transmission direction of the strip 29, which changes the relative position between the laser beam path emitted by the laser cutting head and the strip 29. To maintain the relative position between the laser beam path and the strip 29, after the controller controls the correction device 1122 to correct the strip 29, when the first cutting mechanism 110 cuts the strip 29, it simply controls the laser cutting head to move by the same offset from the original predetermined path.

[0106] For example, the controller obtains the difference in the second width of the two main body portions based on the images of the first electrode 31 and the second electrode 32 as a correction value, and controls the correction device 1122 to adjust the transmission direction of the strip 29 so that the strip 29 deviates from the correction value. When the first cutting mechanism 110 cuts the strip 29, the controller sends a command with the correction value to the servo motor so that the servo motor controls the laser cutting head to move the offset value based on the original predetermined path, keeping the positional relationship between the laser light path emitted by the laser cutting head and the strip 29 unchanged.

[0107] When it is necessary to correct the position of the cutting strip 29 by the first cutting mechanism 110 and the position of the cutting electrode 30 by the second cutting mechanism 111, the controller, based on the images of the first electrode 31 and the second electrode 32, obtains the difference between the first width of the marking layer 303 of the first electrode 31 and the first width of the marking layer 303 of the second electrode 32 as the first correction value, and obtains the difference between the second width of the main body of the first electrode 31 and the second width of the main body of the second electrode 32 as the second correction value. The controller controls the correction device 1122 to adjust the transmission direction of the strip 29 so that the strip 29 deviates from the second correction value. When the first cutting mechanism 110 cuts the strip 29, the controller sends a command containing the sum of the first and second correction values ​​to the servo motor, so that the servo motor controls the laser cutting head to move the sum of the first and second correction values ​​based on the original predetermined path. Understandably, the first and second correction values ​​can be positive or negative. Therefore, the sum of the first and second correction values ​​can also be positive or negative. If the sum of the first and second correction values ​​is positive, the servo motor controls the laser cutting head to move along the first direction based on the original predetermined path. If the sum of the first and second correction values ​​is negative, the servo motor controls the laser cutting head to move in the opposite direction based on the original predetermined path. In this way, the first cutting mechanism 110 can eliminate the error caused by the material strip 29 deviating from the first correction value when cutting the material strip 29, while also correcting the position of the cutting material strip 29.

[0108] In some embodiments, the second cutting mechanism 111 may be a slitting machine, which has the same meaning as commonly understood by those skilled in the art, and the method of slitting the electrode sheet 30 by the slitting machine will not be described in detail here.

[0109] In the above technical solution, the same correction mechanism 112 can correct the first cutting mechanism 110 and the second cutting mechanism 111 respectively, thereby greatly simplifying the layout of the electrode slitting system 101.

[0110] As shown in Figure 6, according to some embodiments of this application, the visual inspection device 1121 includes a macro camera.

[0111] A macro camera is defined as such by those skilled in the art. It primarily uses a lens and lens system to focus the light from the subject onto an image sensor. The image sensor converts the light into an electrical signal and sends it to the macro camera's image processor. After receiving the electrical signal from the image sensor, the image processor performs amplification, filtering, noise reduction, and encoding to form the final image.

[0112] The first electrode 31 and the second electrode 32 output from the second cutting mechanism 111 can be conveyed by the conveying mechanism in the electrode slitting system 101. The macro camera captures images of the first electrode 31 and the second electrode 32 conveyed by the conveying mechanism.

[0113] There can be multiple macro cameras, which can take pictures of the first electrode 31 and the second electrode 32 respectively to obtain images of the first electrode 31 and the second electrode 32.

[0114] The conveying mechanism may include a first conveying roller for conveying the first electrode 31 and a second conveying roller for conveying the second electrode 32. Two macro cameras are respectively positioned corresponding to the first and second conveying rollers to capture images of the first electrode 31 and the second electrode 32.

[0115] In some embodiments, the controller can control the macro camera to acquire images of the first electrode 31 and the second electrode 32 at preset time intervals. Exemplarily, the visual inspection device 1121 may further include two encoders, which are respectively disposed on the first and second conveying mechanisms. For example, they may be connected to the rotating shafts of the first and second conveying rollers, respectively, and rotate with the shafts. The encoders are used to output pulse signals to the controller according to the rotation angle, and the controller responds to the pulse signals to control the macro camera to capture images of the first electrode 31 and the second electrode 32. For example, pulse signals may be output to the controller at preset rotation angles so that the shooting frequency of the macro camera on the first electrode 31 and the second electrode 32 is consistent with the transmission speed of the first electrode 31 and the second electrode 32.

[0116] In the above technical solution, the macro camera is small in size, which can acquire images of the first electrode 31 and the second electrode 32 without occupying too much space, further simplifying the layout of the electrode cutting system 101.

[0117] As shown in Figure 6, according to some embodiments of this application, the electrode slitting system 101 further includes: an unwinding mechanism 113, disposed on the side of the first cutting mechanism 110 away from the second cutting mechanism 111, for unwinding the material strip 29 input to the electrode slitting system 101 and conveying it to the first cutting mechanism 110; a first driving mechanism 114, for driving the unwinding mechanism 113 to convey the unwound material strip 29 to the first cutting mechanism 110; and a winding mechanism 117, disposed on the side of the second cutting mechanism 111 away from the first cutting mechanism 110, for winding the first electrode 31 and the second electrode 32.

[0118] In other words, the strip 29 unwound by the unwinding mechanism 113 first passes through the first driving mechanism 114, and after being driven by the first driving mechanism 114, it is conveyed to the first cutting mechanism 110.

[0119] In some embodiments, the correction mechanism 112 includes a correction device 1122. The correction device 1122 is used to adjust the transmission direction of the material strip 29 and then transmit the material strip 29 to the first cutting mechanism 110. The first driving mechanism 114 can be arranged before the correction device 1122 to drive the material strip 29 to the correction device 1122, and then the correction device 1122 transmits the material strip 29 to the first cutting mechanism 110. In this way, after the correction device 1122 corrects the material strip 29, it transmits the material strip 29 directly to the first cutting mechanism 110 without passing through other mechanisms. This can avoid the problem of the material strip 29 shifting due to passing through other mechanisms to a certain extent, thereby maintaining a high correction accuracy.

[0120] The first drive mechanism 114 can be any mechanism known to those skilled in the art for driving the transmission of the conveyor belt 29.

[0121] Both the unwinding mechanism 113 and the winding mechanism 117 can be any mechanism known to those skilled in the art that can perform winding and unwinding functions.

[0122] In the above technical solution, the first driving mechanism 114 drives the unwinding mechanism 113 to unwind the material strip 29 to the first cutting mechanism 110, so that the material strip 29 maintains a certain tension during the transmission process. This is beneficial to control the position of the first cutting mechanism 110 cutting the material strip 29 and control the position of the second cutting mechanism 111 slitting the material strip 29 as expected, thereby improving the slitting accuracy of the electrode sheet 30.

[0123] Referring to FIG7, according to some embodiments of the present application, the first driving mechanism 114 includes: a first mounting structure 1141; a first driving roller 1142 rotatably mounted on the first mounting structure 1141; a first pressure roller 1143 rotatably mounted on the first mounting structure 1141 and disposed opposite to the first driving roller 1142 to define a first pressing gap with the first driving roller 1142; an unwinding mechanism 113 for conveying the material belt 29 to the first pressing gap; and the first driving roller 1142 for rotating to drive the material belt 29 to be conveyed through the first pressing gap to the first cutting mechanism 110.

[0124] The first drive roller 1142 may include a first roller body and a first roller neck, with the first roller neck disposed at both ends of the first roller body along its extension direction. The first roller neck is also provided with a bearing, which may include an inner ring and an outer ring fitted around the outer circumference of the inner ring, the inner ring being rotatable relative to the outer ring. In one example, multiple balls may be present between the outer ring and the inner ring, contacting both the inner and outer rings and configured to drive the inner ring to rotate relative to the outer ring in a rolling manner. The inner ring may be fitted around the outer circumference of the first roller neck, and the outer ring may be mounted on the first mounting structure 1141. Thus, when the inner ring rotates relative to the outer ring, the first drive roller 1142 rotates relative to the first mounting structure 1141.

[0125] In some embodiments, the first drive mechanism 114 may further include a first drive motor 1144, which is used to drive the bearing to rotate so as to drive the first drive roller 1142 to rotate.

[0126] The first roller body and the first pressure roller 1143 are positioned opposite each other, and the gap between the first roller body and the first pressure roller 1143 forms the first pressing gap. The end of the first pressure roller 1143 can also be mounted to the first mounting structure 1141 by a bearing, so that the first pressure roller 1143 can rotate relative to the first mounting structure 1141.

[0127] The gap width of the first pressing gap is configured such that the material strip 29 contacts both the first drive roller 1142 and the first pressure roller 1143. Thus, when the first drive roller 1142 rotates, the two surfaces of the material strip 29 rub against the first drive roller 1142 and the first pressure roller 1143 respectively, so that the driving force of the first drive roller 1142 can be transmitted to the first pressure roller 1143 through the material strip 29, driving the first pressure roller 1143, which is in contact with the other surface of the material strip 29, to rotate, thereby driving the material strip 29 through the first pressing gap.

[0128] In the above technical solution, the first pressing gap can restrict the conveying direction of the material belt 29 while driving the material belt 29 to convey, so that the conveying direction of the material belt 29 meets the expectation. This is beneficial to control the position of the first cutting mechanism 110 cutting the material belt 29 and the position of the second cutting mechanism 111 slitting the material belt 29 to meet the expectation, thereby improving the slitting accuracy of the electrode sheet 30.

[0129] Referring to FIG6, according to some embodiments of the present application, the electrode slitting system 101 further includes: a second driving mechanism 115, disposed between the second cutting mechanism 111 and the winding mechanism 117, the second driving mechanism 115 being used to drive the first electrode 31 and the second electrode 32 to be conveyed to the winding mechanism 117.

[0130] In other words, the first electrode 31 and the second electrode 32 output by the second cutting mechanism 111 are driven by the second driving mechanism 115 and then transported to the winding mechanism 117.

[0131] Because the electrode slitting system 101 is large in size and the distance between the second cutting mechanism 111 and the winding mechanism 117 is far, a second driving mechanism 115 is provided to provide a certain driving force during the transmission of the first electrode 31 and the second electrode 32, so that the first electrode 31 and the second electrode 32 maintain a certain tension. In this way, the alignment of the end faces of the first electrode 31 and the second electrode 32 can be guaranteed to a certain extent by the winding mechanism 117 winding them, and no barrel material is generated.

[0132] The second drive mechanism 115 can be any mechanism known to those skilled in the art for driving the transmission of the conveyor belt 29.

[0133] The number of winding mechanisms 117 is at least two, and the two winding mechanisms 117 are respectively provided for the first electrode 31 and the second electrode 32, so as to wind up the first electrode 31 and the second electrode 32 respectively.

[0134] In the above technical solution, the second drive mechanism 115 ensures that the first electrode 31 and the second electrode 32 output by the second cutting mechanism 111 maintain a certain tension, which helps improve the flatness of the winding mechanism 117 in winding the first electrode 31 and the second electrode 32. Furthermore, the second drive mechanism 115, in conjunction with the first drive mechanism 114, ensures that the material strip 29 maintains a certain tension throughout the entire transmission process, which helps to further control the position of the first cutting mechanism 110 cutting the material strip 29 and the position of the second cutting mechanism 111 slitting the material strip 29 as expected.

[0135] According to some embodiments of this application, the second drive mechanism 115 includes: two second mounting structures; two second drive rollers, which are rotatably mounted on the two second mounting structures respectively; and two second pressure rollers, which are rotatably mounted on the two second mounting structures respectively and are disposed opposite to the second drive rollers on the second mounting structures to define a second pressing gap with the second drive rollers. The second drive rollers are used to rotate to drive the first electrode 31 and the second electrode 32 to be conveyed to the winding mechanism 117 through the corresponding second pressing gaps respectively.

[0136] In other words, a second drive roller and a second pressure roller are provided on a second mounting structure, and the second drive roller and the second pressure roller are arranged opposite to each other to define a second pressing gap, and two second mounting structures respectively define two second pressing gaps.

[0137] The two secondary mounting structures can be arranged vertically, which saves space in the horizontal direction of the electrode slitting system 101 and reduces the floor space.

[0138] The following description uses a second drive roller and a second pressure roller mounted on a second mounting structure as an example.

[0139] The second drive roller may include a second roller body and a second roller neck, with the second roller neck disposed at both ends of the second roller body along the extending direction of the second roller body. The second roller neck is also provided with a bearing, with the inner ring of the bearing sleeved on the outer circumference of the second roller neck, and the outer ring being mounted on a second mounting mechanism. Thus, when the inner ring rotates relative to the outer ring, the second drive roller rotates relative to the second mounting structure.

[0140] In some embodiments, the second drive mechanism 115 may further include a second drive motor, which is used to drive the bearing to rotate so as to drive the second drive roller to rotate.

[0141] The second roller body is positioned opposite the second pressure roller, and the gap between the second roller body and the second pressure roller forms the second pressing gap. The end of the second pressure roller can also be mounted to the second mounting structure via bearings, allowing the second pressure roller to rotate relative to the second mounting structure.

[0142] The gap width of the second pressing gap is configured such that the strip 29 contacts both the second drive roller and the second pressure roller.

[0143] In the above technical solution, the second pressing gap can restrict the conveying direction of the electrode 30 while driving the electrode 30 to be conveyed, so that the conveying direction of the strip 29 and the electrode 30 is as expected. This is beneficial to improving the flatness of the winding mechanism 117 in winding the first electrode 31 and the second electrode 32, as well as controlling the position of the first cutting mechanism 110 cutting the strip 29 and controlling the position of the second cutting mechanism 111 slitting the strip 29 as expected.

[0144] Referring to FIG6, according to some embodiments of this application, the electrode slitting system 101 further includes a tension adjustment mechanism for adjusting the tension of the first electrode 31 and the second electrode 32 output by the second cutting mechanism 111 and then conveying them to the second driving mechanism 115.

[0145] The first electrode 31 and the second electrode 32 output from the second cutting mechanism 111 pass through the tension adjustment mechanism. The tension adjustment mechanism is used to adjust the tension of the first electrode 31 and the second electrode 32 to avoid the tension of the first electrode 31 and the second electrode 32 being too large or too small. This greatly reduces the problem of the first electrode 31 and the second electrode 32 breaking due to excessive tension, or the winding mechanism 117 winding the first electrode 31 and the second electrode 32 having low end face alignment or even producing barrel material due to insufficient tension.

[0146] It is understandable that the tension adjustment mechanism is set after the first drive mechanism 114 and before the second drive mechanism 115 to adjust the tension of the first electrode 31 and the second electrode 32 transmitted between the first drive mechanism 114 and the second drive mechanism 115, thereby reducing the difficulty of the first drive mechanism 114 and the second drive mechanism 115 synchronously driving the first electrode 31 and the second electrode 32.

[0147] The tension adjustment mechanism can be any mechanism known to those skilled in the art that can adjust and control tension.

[0148] The above technical solution can, to a certain extent, avoid the problem that the second driving mechanism 115's driving effect on the first electrode 31 and the second electrode 32 is poor due to the tension of the first electrode 31 and the second electrode 32 output by the second cutting mechanism 111 being too small. It can also, to a certain extent, avoid the problem that the second driving mechanism 115's driving effect on the first electrode 31 and the second electrode 32 is broken due to the tension of the first electrode 31 and the second electrode 32 output by the second cutting mechanism 111 being too large. It maintains the tension balance between the first driving mechanism 114 and the second driving mechanism 115.

[0149] Referring to Figure 8, according to some embodiments of this application, the tension adjustment mechanism includes: two tension adjustment components 1161, which are respectively used to adjust the tension of the first electrode 31 and the second electrode 32. Each tension adjustment component 1161 includes: a third mounting structure (not shown); at least one tension adjustment roller 41, which is used to convey the first electrode 31 or the second electrode 32; a mounting part 42, which is movably mounted on the third mounting structure along a first direction X, and the tension adjustment roller 41 is rotatably mounted on the mounting part 42, wherein the first direction X is perpendicular to the extension direction of the tension adjustment roller 41; and a tension adjustment controller 43, which controls the mounting part 42 to move along the first direction X to drive the tension adjustment roller 41 to move along the first direction X, thereby adjusting the distance between the tension adjustment roller 41 and the second drive mechanism 115.

[0150] The two tension adjustment components 1161 can be arranged vertically to save space in the horizontal direction of the electrode slitting system 101 and reduce the floor area.

[0151] The tension adjusting roller 41 is rotatable relative to the mounting portion 42, so the first electrode 31 or the second electrode 32 is transmitted to the second drive mechanism 115 via the tension adjusting roller 41. In some embodiments, both ends of the tension adjusting roller 41 can be mounted to the mounting portion 42 by bearings.

[0152] The mounting part 42 is movably mounted on the third mounting structure along the first direction X. Thus, as the mounting part 42 moves along the first direction X, it can drive the tension adjusting roller 41 to move along the first direction X, thereby adjusting the tension of the first electrode 31 or the second electrode 32 transmitted by the tension adjusting roller 41. Here, "moving the mounting part 42 along the first direction X" means that the mounting part 42 can reciprocate along the first direction X.

[0153] For example, the tension adjustment controller 43 can control the first electrode 31 or the second electrode 32 to move closer to the second drive mechanism 115 in the first direction X, or it can control the first electrode 31 or the second electrode 32 to move away from the second drive mechanism 115 in the first direction X. Thus, when the tension of the first electrode 31 or the second electrode 32 is too high, the tension of the first electrode 31 or the second electrode 32 transmitted between the tension adjustment roller 41 and the second drive mechanism 115 is too high. Based on this, the distance between the tension adjustment roller 41 and the second drive mechanism 115 can be reduced to decrease the tension of the first electrode 31 or the second electrode 32. Conversely, when the tension of the first electrode 31 or the second electrode 32 transmitted between the tension adjustment roller 41 and the second drive mechanism 115 is too loose, the distance between the tension adjustment roller 41 and the second drive mechanism 115 can be increased to tighten the first electrode 31 or the second electrode 32.

[0154] The extension direction of the tension regulating roller 41 can be the width direction of the first electrode 31 or the second electrode 32 transmitted through the tension regulating roller 41, and the transmission direction of the first electrode 31 and the second electrode 32 can be perpendicular to the extension direction of the tension regulating roller 41.

[0155] In some embodiments, there are multiple tension adjusting rollers 41 arranged in parallel, and the first electrode 31 or the second electrode 32 passes around the multiple tension adjusting rollers 41 to transmit to the second drive mechanism 115.

[0156] In some embodiments, the mounting portion 42 can be mounted to the third mounting structure via a sliding assembly. The sliding assembly may include a slide rail 44 and a slider 45, the slider 45 being movable relative to the slide rail 44. The slide rail 44 extends along a first direction X and is mounted to the mounting portion 42, while the slider 45 can be mounted to the third mounting structure. The tension adjustment controller 43 drives the mounting portion 42 to move, causing relative movement between the mounting portion 42 and the slider 45 in the first direction X, thereby enabling the mounting portion 42 to move relative to the third mounting structure in the first direction X.

[0157] In some embodiments, the tension adjustment controller 43 may include, but is not limited to, a cylinder, electric cylinder, or other structure capable of driving the mounting part 42 to move.

[0158] In the above technical solution, by driving the tension adjusting roller 41 to move along the first direction X, the tension of the first electrode 31 and the second electrode 32 conveyed between the second cutting mechanism 111 and the second driving mechanism 115 can be adjusted, thereby realizing the adjustment of the tension of the first electrode 31 and the second electrode 32.

[0159] Referring to FIG6, according to some embodiments of the present application, the unwinding mechanism 113 includes: a first unwinding structure 1131 and a second unwinding structure 1132 arranged at intervals, both the first unwinding structure 1131 and the second unwinding structure 1132 being used to load the strip 29; and an unwinding and rewinding structure 1133 for rewinding the strip 29 loaded in the first unwinding structure 1131 and the second unwinding structure 1132, so that one of the first unwinding structure 1131 and the second unwinding structure 1132 unwinds the strip 29 to the first cutting mechanism 110.

[0160] The first unwinding structure 1131 and the second unwinding structure 1132 can be arranged vertically and horizontally to make full use of the vertical space of the workshop, reduce the lateral dimension of the electrode slitting system 101, reduce the floor area, and reduce the construction cost of the factory.

[0161] The first unwinding structure 1131 and the second unwinding structure 1132 can have the same structure. For example, they can both include an unwinding roller. The strip 29 is wound on the unwinding roller, and the strip 29 is unwound by controlling the rotation of the unwinding roller.

[0162] The unwinding and changing structure 1133 is used to bond the starting end of the strip 29 wound by the second unwinding structure 1132 to the end of the strip 29 wound by the first unwinding structure 1131, or to bond the starting end of the strip 29 wound by the first unwinding structure 1131 to the end of the strip 29 wound by the second unwinding structure 1132, so that the strip 29 can be continuously and uninterruptedly fed into production. The unwinding and changing structure 1133 may include an unwinding pressing structure, which can be used to press or bond the strip 29 to achieve pressing and bonding of the strip 29.

[0163] In the above technical solution, the unwinding mechanism 113 can be used in a standby manner, which helps to shorten the waiting time for the unwinding mechanism 113 to feed materials and improve the efficiency of the electrode slitting system 101 in slitting the electrode 30.

[0164] Referring again to FIG6, according to some embodiments of this application, the winding mechanism 117 includes a first winding assembly 1171 and a second winding assembly 1172; wherein, the first winding assembly 1171 includes: a first winding structure 51 and a second winding structure 52 arranged at intervals, both the first winding structure 51 and the second winding structure 52 being used to wind the first electrode sheet 31, and a first winding-and-changing structure 53 being used to control one of the first winding structure 51 and the second winding structure 52 to wind the first electrode sheet 31; the second winding assembly 1172 includes: a third winding structure 61 and a fourth winding structure 62 arranged at intervals, both the third winding structure 61 and the fourth winding structure 62 being used to wind the second electrode sheet 32, and a second winding-and-changing structure 63 being used to control one of the third winding structure 61 and the fourth winding structure 62 to wind the second electrode sheet 32.

[0165] The first winding assembly 1171 and the second winding assembly 1172 can be arranged alternately on the left and right sides to make full use of the vertical space of the workshop, reduce the lateral dimension of the electrode slitting system 101, reduce the floor area, and reduce the construction cost of the factory.

[0166] The first winding structure 51 and the second winding structure 52 can be arranged alternately on the left and right, and the third winding structure 61 and the fourth winding structure 62 can be arranged alternately on the left and right.

[0167] The first winding structure 51 and the second winding structure 52 can have the same structure, and the third winding structure 61 and the fourth winding structure 62 can also have the same structure. For example, each can include a winding roller, and the first electrode 31 and the second electrode 32 can be wound up by controlling the rotation of the winding roller.

[0168] The first winding and rewinding structure 53 is used to cut off the end of the first electrode 31 on one of the first winding structure 51 and the second winding structure 52, and attach it to the starting end of the first electrode 31 on the other of the first winding structure 51 and the second winding structure 52.

[0169] The second winding and rewinding structure 63 is used to cut off the end of the second pole piece 32 on one of the third winding structure 61 and the fourth winding structure 62, and to attach it to the starting end of the second pole piece 32 on the other of the third winding structure 61 and the fourth winding structure 62.

[0170] The first winding and rewinding structure 53 and the second winding and rewinding structure 63 may both include a winding cutter and a winding pressing structure. The winding cutter is used to cut the first electrode 31 or the second electrode 32, and the winding pressing structure is used to press or bond the first electrode 31 / second electrode 32 to achieve tape changing.

[0171] In the above technical solution, the winding mechanism 117 can be used in a standby manner, which helps to shorten the material taking time of the winding mechanism 117 and improve the efficiency of the electrode slitting system 101 in slitting the electrode 30.

[0172] This application provides a battery production equipment, which includes the electrode slitting system 101 described in the above embodiments.

[0173] Battery production equipment can be used for battery production. For example, it can be used to wind a first electrode and a second electrode to form a wound cell, or it can be used to stack the first electrode and the second electrode to form a stacked cell.

[0174] Referring to Figures 6 to 8, this application embodiment provides an electrode slitting system 101, including: a first cutting mechanism 110, used to cut a strip 29 input to the electrode slitting system 101 to form an electrode 30 and to transport the electrode 30, the electrode 30 including tabs located on both sides; a second cutting mechanism 111, used to receive the electrode 30 transported by the first cutting mechanism 110 and to slit the electrode 30 into a first electrode 31 and a second electrode 32, the first electrode 31 and the second electrode 32 both including tabs located on one side; and a correction mechanism 112, used to acquire images of the first electrode 31 and the second electrode 32, and to correct the position of the first cutting mechanism 110 cutting the strip 29 and / or correct the position of the second cutting mechanism 111 slitting the electrode 30 based on the images, so that the width dimensions of the first electrode 31 and the second electrode 32 formed after correction are consistent.

[0175] The first cutting mechanism 110 includes a laser cutting device, and the second cutting mechanism 111 includes a slitting mechanism.

[0176] The correction mechanism 112 includes: a visual inspection device 1121, disposed on the side of the second cutting mechanism 111 away from the first cutting mechanism 110, for acquiring images of the first electrode 31 and the second electrode 32; a correction device 1122, for transmitting the material strip 29 input to the electrode slitting system 101 to the first cutting mechanism 110; and a controller for controlling the position of the laser path emitted by the laser cutting device to correct the position of the cutting material strip 29, and the controller is also used to control the correction device 1122 to adjust the transmission direction of the material strip 29 to correct the position of the electrode 30 cut by the second cutting mechanism 111.

[0177] The correction device 1122 includes: a correction roller for conveying the conveyor belt 29; two sensors disposed on the same side of the first portion 301 of the conveyor belt 29, respectively for detecting the positions of the first edges of the two marking layers 303 that are close to each other; and a controller for controlling the rotation of the correction roller based on the image and the positions of the first edges detected by the sensors to adjust the conveying direction of the conveyor belt 29. The visual inspection device 1121 includes a macro camera.

[0178] The first driving mechanism 114 includes: a first mounting structure 1141; a first driving roller 1142 rotatably mounted on the first mounting structure 1141; a first pressure roller 1143 rotatably mounted on the first mounting structure 1141 and disposed opposite to the first driving roller 1142 to define a first pressing gap with the first driving roller 1142; an unwinding mechanism 113 for conveying the material belt 29 to the first pressing gap; and the first driving roller 1142 for rotating to drive the material belt 29 to be conveyed to the first cutting mechanism 110 via the first pressing gap.

[0179] The electrode slitting system 101 further includes: an unwinding mechanism 113, disposed on the side of the first cutting mechanism 110 away from the second cutting mechanism 111, for unwinding the material strip 29 input to the electrode slitting system 101 and conveying it to the first cutting mechanism 110; a first driving mechanism 114, for driving the material strip 29 unwound by the unwinding mechanism 113 to convey it to the first cutting mechanism 110; and a winding mechanism 117, disposed on the side of the second cutting mechanism 111 away from the first cutting mechanism 110, for winding the first electrode 31 and the second electrode 32.

[0180] The electrode slitting system 101 further includes a second drive mechanism 115, disposed between the second cutting mechanism 111 and the winding mechanism 117. The second drive mechanism 115 is used to drive the first electrode 31 and the second electrode 32 to be conveyed to the winding mechanism 117. This ensures that the first electrode 31 and the second electrode 32 output from the second cutting mechanism 111 maintain a certain tension, which helps improve the flatness of the winding mechanism 117 when winding the first electrode 31 and the second electrode 32.

[0181] The second drive mechanism 115 includes: two second mounting structures; two second drive rollers, each rotatably mounted on a second mounting structure; and two second pressure rollers, each rotatably mounted on a second mounting structure and arranged opposite to the second drive rollers on the second mounting structure, so as to define a second pressing gap with the second drive rollers. The first electrode 31 and the second electrode 32 are respectively conveyed into the two second pressing gaps. The two second drive rollers are used to rotate to drive the first electrode 31 and the second electrode 32 to be conveyed to the winding mechanism 117 through the corresponding second pressing gaps.

[0182] The electrode slitting system 101 further includes a tension adjustment mechanism for adjusting the tension of the first electrode 31 and the second electrode 32 output from the second cutting mechanism 111 before conveying them to the second drive mechanism 115. The tension adjustment mechanism includes two tension adjustment components 1161, which are respectively used to adjust the tension of the first electrode 31 and the second electrode 32. Each tension adjustment component 1161 includes: a third mounting structure; at least one tension adjustment roller 41 for conveying the first electrode 31 or the second electrode 32; a mounting part 42 movably mounted on the third mounting structure along a first direction X, with the tension adjustment roller 41 rotatably mounted on the mounting part 42, the first direction X being perpendicular to the extension direction of the tension adjustment roller 41; and a tension adjustment controller 43 for controlling the mounting part 42 to move along the first direction X to drive the tension adjustment roller 41 to move along the first direction X, thereby adjusting the distance between the tension adjustment roller 41 and the second drive mechanism 115.

[0183] The unwinding mechanism 113 includes: a first unwinding structure 1131 and a second unwinding structure 1132 arranged at intervals, both of which are used to load the material strip 29; and an unwinding and rewinding structure 1133 for rewinding the material strip 29 loaded in the first unwinding structure 1131 and the second unwinding structure 1132, so that one of the first unwinding structure 1131 and the second unwinding structure 1132 unwinds the material strip 29 to the first cutting mechanism 110.

[0184] The winding mechanism 117 includes a first winding assembly 1171 and a second winding assembly 1172; wherein, the first winding assembly 1171 includes: a first winding structure 51 and a second winding structure 52 arranged at intervals, both of which are used to wind the first electrode sheet 31, and a first winding-and-changing structure 53 for controlling one of the first winding structure 51 and the second winding structure 52 to wind the first electrode sheet 31; the second winding assembly 1172 includes: a third winding structure 61 and a fourth winding structure 62 arranged at intervals, both of which are used to wind the second electrode sheet 32, and a second winding-and-changing structure 63 for controlling one of the third winding structure 61 and the fourth winding structure 62 to wind the second electrode sheet 32.

[0185] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An electrode slitting system, comprising: A first cutting mechanism is used to cut the strip of material input to the electrode slitting system to form an electrode and to transport the electrode, the electrode including tabs on both sides; The second cutting mechanism is used to receive the electrode sheet fed by the first cutting mechanism and cut the electrode sheet into a first electrode sheet and a second electrode sheet, wherein both the first electrode sheet and the second electrode sheet include an electrode tab located on one side; The correction mechanism is used to acquire images of the first electrode and the second electrode, and to correct the position of the first cutting mechanism cutting the strip and / or the position of the second cutting mechanism cutting the electrode based on the images, so that the width of the first electrode and the second electrode formed after correction is consistent.

2. The electrode slitting system according to claim 1, wherein, The material strip includes a first part and a second part located on opposite sides of the first part, and the first part is provided with an identification layer near the edge of the second part; The first cutting mechanism is used to cut the second part to form the electrode tab; The second cutting mechanism is used to cut the electrode sheet along the centerline of the first portion to form the first electrode sheet and the second electrode sheet. The portion of the first portion other than the marking layer is used to form the main body portions of the first electrode sheet and the second electrode sheet respectively. The electrode tab is located on one side of the main body portion. The correction mechanism is used to obtain the first width of the marking layer in the first electrode and the second electrode respectively based on the image, and to correct the position of the cutting mechanism cutting the strip based on the difference between the two first widths. It is also used to obtain the second width of the main body portion in the first electrode and the second electrode respectively based on the image, and to correct the position of the second cutting mechanism cutting the electrode based on the difference between the two second widths.

3. The electrode slitting system according to claim 2, wherein, The correction mechanism includes: A visual inspection device is disposed on the side of the second cutting mechanism away from the first cutting mechanism, for acquiring images of the first electrode and the second electrode; A correction device is used to transfer the material strip input to the electrode slitting system to the first cutting mechanism; A controller for receiving the image; The controller is also used to control the correction device to adjust the transmission direction of the conveyor belt based on the image.

4. The electrode slitting system according to claim 3, wherein, The correction device includes: The alignment roller is used to convey the material strip; A sensor, disposed corresponding to a first portion of the strip, is used to detect the position of the marking layer away from a first edge of the second portion; The controller is used to control the rotation of the correction roller based on the image and the position of the first edge detected by the sensor, so as to adjust the transmission direction of the material belt.

5. The electrode slitting system according to claim 3 or 4, wherein, The first cutting mechanism includes a laser cutting device, which is used to cut the strip using a laser. The controller is used to control the position of the laser path emitted by the laser cutting device to correct the position of the material strip being cut, and the controller is also used to control the correction device to adjust the transmission direction of the material strip to correct the position of the second cutting mechanism cutting the electrode sheet.

6. The electrode slitting system according to any one of claims 3-5, wherein, The visual inspection device includes a macro camera.

7. The electrode slitting system according to any one of claims 1-6, wherein, The electrode slitting system further includes: An unwinding mechanism is located on the side of the first cutting mechanism away from the second cutting mechanism, and is used to unwind the strip material input to the electrode slitting system so as to transport it to the first cutting mechanism; A first driving mechanism is used to drive the unwinding mechanism to convey the unwound strip to the first cutting mechanism; A winding mechanism is located on the side of the second cutting mechanism away from the first cutting mechanism, and is used to wind up the first electrode sheet and the second electrode sheet.

8. The electrode slitting system according to claim 7, wherein, The first driving mechanism includes: First installation structure; The first drive roller is rotatably mounted on the first mounting structure; A first pressure roller is rotatably mounted on the first mounting structure and is disposed opposite to the first drive roller to define a first pressing gap with the first drive roller. The unwinding mechanism is used to convey the material strip to the first pressing gap, and the first drive roller is used to rotate to drive the material strip to be conveyed to the first cutting mechanism through the first pressing gap.

9. The electrode slitting system according to claim 7 or 8, wherein, The electrode slitting system further includes: A second driving mechanism is disposed between the second cutting mechanism and the winding mechanism. The second driving mechanism is used to drive the first electrode and the second electrode to be conveyed to the winding mechanism.

10. The electrode slitting system according to claim 9, wherein, The second drive mechanism includes: Two secondary mounting structures; Two second drive rollers are rotatably mounted on two second mounting structures, respectively; Two second pressure rollers are rotatably mounted on two second mounting structures and are arranged opposite to the second drive rollers on the second mounting structures to define a second pressing gap with the second drive rollers. The second drive rollers are used to rotate to drive the first electrode sheet and the second electrode sheet to be conveyed to the winding mechanism through the corresponding second pressing gaps.

11. The electrode slitting system according to claim 9 or 10, wherein, The electrode slitting system further includes: The tension adjustment mechanism is used to adjust the tension of the first electrode and the second electrode output from the second cutting mechanism and then deliver them to the second driving mechanism.

12. The electrode slitting system according to claim 11, wherein, The tension adjustment mechanism includes two tension adjustment components, which are respectively used to adjust the tension of the first electrode and the second electrode. Each tension adjustment component includes: Third installation structure; At least one tension adjusting roller, the tension adjusting roller being used to convey the first electrode or the second electrode; The mounting part is movably mounted on the third mounting structure along a first direction, and both ends of the tension adjusting roller are rotatably mounted on the mounting part, wherein the first direction is perpendicular to the extension direction of the tension adjusting roller. A tension adjustment controller is used to control the installation part to move along the first direction to drive the tension adjustment roller to move along the first direction, thereby adjusting the distance between the tension adjustment roller and the second drive mechanism.

13. The electrode slitting system according to any one of claims 7-12, wherein, The unwinding mechanism includes: A first unwinding structure and a second unwinding structure are arranged at intervals, both of which are used to load the material strip; An unwinding and rewinding structure is used to rewind the material strip loaded on the first unwinding structure and the second unwinding structure, so that one of the first unwinding structure and the second unwinding structure unwinds the material strip to the first cutting mechanism.

14. The electrode slitting system according to any one of claims 7-13, wherein, The winding mechanism includes a first winding assembly and a second winding assembly; wherein... The first take-up component includes: A first winding structure and a second winding structure are arranged at intervals, both the first winding structure and the second winding structure being used to wind up the first electrode sheet, and The first winding and rewinding structure is used to control one of the first winding structure and the second winding structure to wind up the first electrode sheet. The second take-up assembly includes: A third and fourth winding structure are arranged at intervals, both of which are used to wind up the second electrode sheet. The second winding and changing structure is used to control one of the third winding structure and the fourth winding structure to wind up the second electrode sheet.

15. A battery manufacturing apparatus, comprising an electrode slitting system as described in any one of claims 1-14.

Images