Method, apparatus, computer readable storage medium and lamination machine for correcting tab position of electrode assembly

Abstract

The present application provides a method and an apparatus for correcting tab positions of an electrode assembly, the electrode assembly including negative and positive plates stacked alternately along a first direction, the method including: determining whether a plurality of consecutive tabs in a first electrode assembly are misaligned; and if a plurality of consecutive tabs are misaligned, adjusting a cutting position of the first electrode assembly to adjust a width of a first electrode plate, which is a negative or positive electrode plate, obtained after cutting, and aligning tabs of a plurality of first electrodes obtained after cutting the first electrode assembly. The method and apparatus for correcting tab positions of an electrode assembly of the present application can effectively correct the positions of the tabs and improve the performance and processing efficiency of the electrode assembly.

Description

[Technical field]

[0001] The present application relates to the field of battery technology, and in particular to a method and apparatus for correcting tab positions in an electrode assembly. [Background technology]

[0002] Energy saving and emission reduction of batteries are key to the sustainable development of the automotive industry, and electric vehicles have become an important part of the sustainable development of the automotive industry due to their energy saving and environmental protection advantages. Battery technology is a key element in the development of electric vehicles.

[0003] Typically, a battery is made up of multiple battery units, each of which includes an electrode assembly made up of a negative electrode plate and a positive electrode plate, and which generates power by the movement of metal ions between the positive and negative electrodes. The electrode plates have tabs protruding from their widthwise edges. Processing of the tabs is related to the quality and safety of the battery, and any problem of tab misalignment will result in defective processing of the battery units. Summary of the Invention

[0004] The embodiments of the present application provide a method and apparatus for correcting the tab position of an electrode assembly, which can effectively correct the tab position and improve the performance and processing efficiency of the electrode assembly.

[0005] According to a first aspect, there is provided a method for correcting tab positions of an electrode assembly, the electrode assembly including negative and positive plates stacked alternately along a first direction, the method including: determining whether or not misalignment occurs in consecutive tabs in a first electrode assembly; and, if misalignment occurs in consecutive tabs, adjusting a cutting position of the first electrode assembly to adjust a width of a first electrode plate, which is a negative electrode plate or a positive electrode plate, obtained after cutting, and aligning tabs of a plurality of first electrodes obtained after cutting the first electrode assembly.

[0006] Therefore, in the method of correcting the tab position of the electrode assembly in the embodiment of the present application, when a delay or advance in position misalignment occurs in multiple consecutive tabs, the position at which the first plate is cut can be adjusted to obtain multiple first plates with different widths, and the loading positions of the multiple first plates can be adjusted, and the relative positions of the tabs can be adjusted so that the tabs that were originally delayed or advanced are adjusted to a nearly aligned state, thereby avoiding the problem of poor processing of the electrode assembly due to tab misalignment, that is, avoiding the problem of poor processing of the individual battery, and further improving the processing efficiency and product quality of the individual battery.

[0007] In some embodiments, adjusting the cut position of the first plate assembly when the consecutive tabs are misaligned includes delaying the cut position of the first plate assembly when the consecutive tabs are all misaligned and the number of the consecutive tabs is equal to or greater than a first threshold, thereby increasing a width of the first plate obtained after cutting and aligning the tabs of the first plate assembly; and / or advancing the cut position of the first plate assembly when the consecutive tabs are all misaligned and the number of the consecutive tabs is equal to or greater than a second threshold, thereby decreasing a width of the first plate obtained after cutting and aligning the tabs of the first plate assembly.

[0008] By setting the first and second thresholds, it is possible to avoid erroneous determination that the position of a tab needs to be adjusted when an individual tab experiences a delay or advance in misalignment or a problem such as wrinkles, thereby improving the accuracy of correction.

[0009] In some embodiments, the distance by which the cutting position of the first plate assembly is delayed is a first preset distance, the first preset distance being less than or equal to 5 / 1000 of the preset nominal width of the first plate, and / or the distance by which the cutting position of the first plate assembly is advanced is a second preset distance, the second preset distance being less than or equal to 5 / 1000 of the preset nominal width of the first plate.

[0010] In this way, it is possible to avoid the delay distance being too large, causing the misalignment adjustment range to be too large, and the original misalignment delay state being adjusted to the misalignment advance state, or the advance distance being too large, causing the misalignment adjustment range to be too large, and the original misalignment advance state being adjusted to the misalignment delay state, and still resulting in poor processing of the electrode assembly. It is also possible to avoid the delay distance being too large, causing the width of the cut first electrode plate to be too large, and the possibility of lithium precipitation occurring during the use process of the single battery, or the advance distance being too large, causing the width of the first electrode plate to be too small, and thus seriously affecting the capacity of the single battery grouped with the electrode assembly.

[0011] In some embodiments, adjusting the cutting position of the first plate assembly when the consecutive tabs are misaligned includes stopping the operation of advancing the cutting position of the first plate assembly when the consecutive tabs are all delayed in position and the number of the consecutive tabs is equal to or greater than a third threshold value that is equal to or less than the first threshold value, and / or stopping the operation of delaying the cutting position of the first plate assembly when the consecutive tabs are all delayed in position and the number of the consecutive tabs is equal to or greater than a fourth threshold value that is equal to or less than the second threshold value. In this way, it is possible to quickly avoid the tab misalignment caused by continuing the original forward cutting operation or delayed cutting operation.

[0012] In some embodiments, the first threshold is equal to the second threshold.

[0013] In some embodiments, the aforementioned determining whether misalignment occurs in consecutive tabs in the first plate assembly includes determining whether a misalignment delay or advance occurs in the i-th tab based on a difference between the i-th position data of the i-th tab in the first plate assembly and preset position data, where the i-th position data indicates a relative positional relationship between the i-th tab and a preset reference material, where i is a positive integer, and determining that misalignment occurs in the consecutive tabs from the i-th tab to the i+j-th tab in the first plate assembly if it is determined that a misalignment delay or advance occurs in all of the i-th tab to the i+j-th tab.

[0014] By determining whether there is a delay in positional misalignment or an advance in positional misalignment in all of the i-th tab through the (i+j)-th tab, it is determined whether misalignment will occur in multiple consecutive tabs, and if there is misalignment in multiple consecutive tabs, the position at which the first plate assembly is cut can be quickly adjusted and the positions of the tabs can be further adjusted.

[0015] In some embodiments, determining whether a delay in misalignment or an advance in misalignment will occur in the i-th tab in the first plate assembly based on the difference between the i-th position data of the i-th tab in the first plate assembly and preset position data as described above includes determining that a delay in misalignment will occur in the i-th tab if the difference between the i-th position data and the preset position data is equal to or greater than a fifth threshold value greater than zero, and determining that an advance in misalignment will occur in the i-th tab if the difference between the i-th position data and the preset position data is equal to or less than a sixth threshold value less than zero.

[0016] In some embodiments, the method further comprises determining the i-th position data.

[0017] In some embodiments, determining the i-th position data as described above includes determining a time when the i-th tab is detected as a target time, and determining a positional relationship between the position of the i-th tab at the target time and the preset reference material as the i-th position data.

[0018] When a tab detection sensor detects a tab and transmits a detection signal to a processing unit, there may be a time lag required for signal transmission that causes the processing unit to not accurately determine the i-th position data of the i-th tab by the time the processing unit receives the signal. Therefore, the target time when the tab was detected is recorded by adding a timestamp to the detection signal transmitted when the tab detection sensor detects a tab, and the i-th position data is determined based on the target time, thereby reducing or avoiding calculation errors.

[0019] In some embodiments, the first plate is a positive plate, and the electrode assembly includes the plurality of first plates.

[0020] In some embodiments, a plurality of scores are arranged alternately on the upper and lower surfaces of the negative electrode plate, and a negative electrode plate region is between two adjacent scores of the plurality of scores, and the negative electrode plate is used to be folded at the scores so that a plurality of negative electrode plate regions and a plurality of the positive electrode plates are arranged in an alternating stack along the first direction.

[0021] In some embodiments, the method further includes: respectively coating a first separator and a second separator on the upper and lower surfaces of the negative plate having a score; sequentially placing the first plates after cutting on the upper surface of the first separator and the lower surface of the second separator according to score positions of the negative plate, such that one first plate is placed correspondingly in each of the negative plate regions among the plurality of negative plate regions, the negative plate being used to be folded at the score so that the plurality of negative plate regions and the plurality of first plates are alternately stacked and placed along the first direction, and the first separator and the second separator are used to separate each of the negative plate regions from the corresponding first plate. Since the score is placed on the negative plate, repeated folding in different directions occurs on the score during the process of free fall loading, which can realize that the plurality of negative plate regions and the plurality of first plates are alternately stacked and placed along the first direction, and further form an electrode assembly.

[0022] In some embodiments, the preset reference material is a negative plate area corresponding to the first plate on which the i-th tab is located, or a score corresponding to the first plate on which the i-th tab is located.

[0023] According to a second aspect, there is provided an apparatus for correcting a tab position of an electrode assembly for performing the method in the first aspect, specifically, the apparatus includes a unit for performing the method in the first aspect.

[0024] According to a third aspect, there is provided an apparatus for correcting tab positions of an electrode assembly, comprising a processor and a memory, the memory being adapted to store a computer program, and the processor being adapted to invoke and run the computer program stored in the memory to perform the method in the first aspect above.

[0025] According to a fourth aspect, there is provided a computer readable storage medium for storing a computer program for causing a computer to carry out the method in the first aspect above.

[0026] According to a fifth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to carry out the method of the first aspect above.

[0027] According to a sixth aspect, there is provided a computer program which, when run on a computer, causes the computer to carry out the method in the first aspect above.

[0028] According to a seventh aspect, there is provided a laminator for processing an electrode assembly including negative and positive plates stacked alternately along a first direction, the laminator including a device for correcting tab positions of the electrode assembly in the second aspect. [Brief description of the drawings]

[0029] [Figure 1] 1 is a schematic flow chart of a method for correcting tab positions of an electrode assembly disclosed in an embodiment of the present application. [Diagram 2] 1 is a schematic exploded view of a structure of a single battery disclosed in an embodiment of the present application. [Diagram 3] 1 is a cross-sectional schematic view of an electrode assembly disclosed in one embodiment of the present application. [Figure 4] FIG. 2 is a cross-sectional schematic view of an electrode assembly disclosed in another embodiment of the present application. [Diagram 5] FIG. 1 is a schematic diagram of an apparatus for fabricating an electrode assembly according to one embodiment of the present disclosure. [Figure 6] 1 is a schematic diagram showing an adjustment of a cutting position of a first plate assembly disclosed in an embodiment of the present application. FIG. [Figure 7] 10 is a schematic flowchart of a method for correcting tab positions of another electrode assembly disclosed in an embodiment of the present application. [Figure 8] FIG. 13 is a schematic block diagram of an apparatus for correcting tab positions of another electrode assembly disclosed in an embodiment of the present application. [Figure 9]FIG. 13 is a schematic block diagram of an apparatus for correcting tab positions of yet another electrode assembly disclosed in an embodiment of the present application.

[0030] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] The embodiments of the present application will be described in more detail below in conjunction with the drawings and examples. The detailed description of the following embodiments and the drawings are for illustrative purposes of the principles of the present application, but cannot be used to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0032] In the description of this application, it should be explained that unless otherwise specified, "multiple" means two or more, and the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc., does not indicate or imply that the device or element shown must have a particular orientation or be constructed and operated in a particular orientation, but is merely for ease of explanation and simplification of the description, and should not be understood as a limitation of the application. Furthermore, terms such as "first", "second", "third", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance. "Perpendicular" does not mean perpendicular in the strict sense, but has a margin of error. "Parallel" does not mean parallel in the strict sense, but has a margin of error.

[0033] All directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, the terms "attachment", "connection" and "connection" should be understood broadly unless otherwise clearly specified or limited. For example, they may be fixedly connected, detachably connected, or integrally connected. They may be directly connected or indirectly connected via an intermediate member. For those skilled in the art, the specific meanings of the above terms in the present application may be understood according to the specific situation.

[0034] In the embodiments of the present application, the same reference numerals represent the same parts, and for the sake of brevity, detailed descriptions of the same parts in different embodiments will be omitted. It should be understood that the thickness, length, width, etc. of various parts in the embodiments of the present application shown in the accompanying drawings, and the overall thickness, length, width, etc. of the integrated device are merely illustrative, and do not constitute any limitation on the present application.

[0035] When referring to an "embodiment" in this application, it means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of this application. The phrases appearing in various places in the specification do not necessarily all refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiment described in this application may be combined with other embodiments.

[0036] Although the present application has been described with reference to the preferred embodiments, various improvements can be made thereto and the elements therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural contradiction, any of the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions included in the claims.

[0037] The battery referred to in this application refers to a single physical module that includes one or more individual batteries to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. The battery generally includes a case for packaging one or more individual batteries. The case can prevent liquid or other foreign matter from affecting the charging or discharging of the individual batteries.

[0038] In some embodiments, the battery unit may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, or a magnesium ion battery, etc., and the embodiments of the present application are not limited thereto. In general, the battery unit may be called a battery cell. The battery unit may be a cylinder, a flat body, a rectangular body, or other regular or irregular shape. The technical solutions of the embodiments of the present application can be used for battery units of any shape.

[0039] The battery unit includes an electrode assembly consisting of a positive plate, a negative plate, and a separator, and an electrolyte. The battery unit operates mainly by the movement of metal ions between the positive plate and the negative plate. The positive plate includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is applied to the surface of the positive electrode collector, the collector on which the positive electrode active material layer is not applied protrudes from the collector on which the positive electrode active material layer is applied, and the collector on which the positive electrode active material layer is not applied is called a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode plate includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is applied to the surface of the negative electrode collector, the collector on which the negative electrode active material layer is not applied protrudes from the collector on which the negative electrode active material layer is applied, and the collector on which the negative electrode active material layer is not applied is a negative electrode tab. The material of the negative electrode collector may be copper, and the negative electrode active material may be carbon or silicon. The positive electrode tab is laminated in multiple layers, and the negative electrode tab is laminated in multiple layers so that melting does not occur even when a large current is passed through it. The material of the separator may be, for example, polypropylene (PP) or polyethylene (PE), etc.

[0040] The development of battery technology requires consideration of a wide range of design factors, such as performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate, and also battery processing efficiency, where tab processing is directly related to the quality and safety of the battery itself, and also related to the performance and safety of the battery. For example, for a stacked electrode assembly, during the manufacturing process, the tab of the positive electrode plate or the tab of the negative electrode plate is likely to have a tab misalignment problem due to factors such as the difference in die-cut size and slippage of the electrode plate driving mechanism, which will lead to poor processing of the battery itself. In order to ensure the pass rate of the battery itself, it is necessary to avoid the tab misalignment or quickly adjust the misaligned tab.

[0041] Therefore, the embodiment of the present application provides a method and device for correcting the tab position of an electrode assembly, which is applied to correct the tab of a stacked electrode assembly. In the method, when a positional deviation occurs in a plurality of consecutive tabs in a first electrode assembly, the cutting position of the first electrode assembly is adjusted to adjust the width of the first electrode plate obtained after cutting, and the tabs of the plurality of first electrode plates obtained after cutting the first electrode assembly are aligned. In this way, when a positional deviation occurs in the tabs, for example, when a delay in the positional deviation or an advance in the positional deviation occurs, a position for cutting the first electrode plate can be adjusted to obtain a plurality of first electrode plates with different widths, and the loading position of the plurality of first electrode plates can be adjusted, and the relative positions of the tabs can be adjusted, so that the tabs that are originally delayed or advanced in the positional deviation can be adjusted to a nearly aligned state, thereby avoiding the problem of poor processing of the electrode assembly due to the tab positional deviation, that is, avoiding the problem of poor processing of the battery unit, and further improving the processing efficiency and product quality of the battery unit.

[0042] FIG. 1 shows a schematic flow chart of a method 100 for correcting tab positions of an electrode assembly according to an embodiment of the present application. The method 100 can be used for a tab correction process of an electrode assembly including negative and positive plates stacked alternately along a first direction. As shown in FIG. 1, the method 100 includes S110 determining whether or not a misalignment occurs in consecutive tabs in a first plate assembly, and S120 adjusting the width of the first plate, which is a negative plate or a positive plate obtained after cutting, by adjusting the cutting position of the first plate assembly if a misalignment occurs in consecutive tabs, and aligning the tabs of the first plate obtained after cutting the first plate assembly.

[0043] It should be understood that the first electrode plate assembly of the embodiments of the present application can be used to cut into a plurality of first electrode plates, which may be negative or positive electrode plates, to be used to stack and form electrode assemblies.

[0044] According to the method 100 for correcting the tab position of an electrode assembly in an embodiment of the present application, when misalignment occurs in multiple consecutive tabs, for example when a delay or advance in misalignment occurs, a position at which the first plate is cut can be adjusted to obtain multiple first plates with different widths, and the loading positions of the multiple first plates can be adjusted, and the relative positions of the tabs can be adjusted so that the tabs that were originally delayed or advanced in misalignment are adjusted to a nearly aligned state, thereby avoiding the problem of poor processing of the electrode assembly due to tab misalignment, that is, avoiding the problem of poor processing of the individual battery, and further improving the processing efficiency and product quality of the individual battery.

[0045] It should be understood that the method 100 of the embodiment of the present application can be used for the correction process of the tab of the electrode assembly installed in the battery unit. Figure 2 shows a schematic exploded structure of the battery unit of the embodiment of the present application. As shown in Figure 2, the battery unit may include one or more electrode assemblies 22 and a housing 21 for accommodating the electrode assembly 22.

[0046] It should be understood that the housing 21 of the embodiment of the present application may have a polyhedral structure, as shown in Fig. 2. Specifically, the housing 21 may include a case 211 and a cover plate 212, where the case 211 may have a hollow structure with at least one end forming an opening, and the shape of the cover plate 212 may be adapted to the shape of the case 211, and the cover plate 212 is used to cover the opening of the case 211 so that the housing 21 isolates the internal environment of the battery unit 20 from the external environment. If the case 211 has a hollow structure with one end forming an opening, the cover plate 212 may be set as one, as shown in Fig. 2, or, differently, if the case 211 has a hollow structure with both opposing ends forming openings, the cover plate 212 may be set as two, and the two cover plates 212 cover the openings at both ends of the case 211, respectively.

[0047] The material of the housing 211 in the embodiment of the present application may be a plurality of types such as copper, iron, aluminum, steel, aluminum alloy, etc. The material of the cover plate 212 may be a plurality of types such as copper, iron, aluminum, steel, aluminum alloy, etc., and the material of the cover plate 212 and the material of the housing 211 may be the same or different.

[0048] The housing 21 of the embodiment of the present application may have a variety of shapes, such as a cylinder, a rectangle, etc. The shapes of the case 211 and the cover plate 212 are interfitted with each other, and for example, as shown in FIG. 2, the case 211 may have a rectangular parallelepiped structure, and the cover plate 212 has a rectangular plate-like structure that fits the case 211.

[0049] For ease of explanation, the present application takes as an example that the housing 21 is a rectangular parallelepiped. Specifically, as shown in Fig. 2, the housing 21 includes a case 211 that is a hollow structure with one end open, and a cover plate 212 that covers the opening of the case 211 and forms a closed cavity in which the electrode assembly 22 is disposed.

[0050] Optionally, multiple components may be installed in the housing 21 of the embodiment of the present application. For example, as shown in Fig. 2, the battery unit 20 may further include a pressure relief mechanism 213, which may be installed on any one wall of the housing 21. For example, Fig. 2 illustrates that the pressure relief mechanism 213 is located on the cover plate 212. Specifically, the pressure relief mechanism 213 is operable to release the internal pressure or temperature of the battery unit 20 when the internal pressure or temperature of the battery unit 20 reaches a threshold value.

[0051] For a battery, the main safety hazard comes from the charging and discharging process. In order to improve the safety performance of the battery, the battery unit 20 is generally provided with a pressure relief mechanism 213. The pressure relief mechanism 213 refers to an element or component that operates to release the internal pressure or temperature when the internal pressure or temperature of the battery unit 20 reaches a predetermined threshold. The predetermined threshold can be adjusted according to different design needs. The predetermined threshold can depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery unit 20. The pressure relief mechanism 213 may be realized by a score on the cover plate 212, or may adopt a pressure-sensitive or temperature-sensitive element or component, etc., that is, when the internal pressure or temperature of the battery unit 20 reaches a predetermined threshold, the pressure relief mechanism 213 operates, thereby forming a channel for releasing the internal pressure or temperature.

[0052] The term "operation" referred to in this application refers to the operation of the pressure relief mechanism 213 to release the internal pressure and temperature of the battery unit 20. The operation caused by the pressure relief mechanism 213 may include, but is not limited to, the rupture, tearing, or melting of at least one part of the pressure relief mechanism 213. After the pressure relief mechanism 213 is operated, the high temperature and high pressure material inside the battery unit 20 is discharged outward from the pressure relief mechanism 213 as discharge. In this manner, if the pressure or temperature is controllable, the pressure of the battery unit 20 can be released, thereby avoiding the occurrence of a potentially more serious accident.

[0053] The discharged materials from the battery unit 20 referred to in this application include, but are not limited to, electrolyte, dissolved or split positive or negative plates, fragments of the separator, high-temperature and high-pressure gas generated by the reaction, flames, etc.

[0054] The pressure relief mechanism 213 on the battery unit 20 has an important effect on the safety of the battery. For example, when a phenomenon such as a short circuit or overcharging occurs in the battery unit 20, thermal runaway may occur inside the battery unit 20, causing a sudden rise in pressure or temperature. In such a case, the pressure relief mechanism 213 operates to release the internal pressure and temperature outward, preventing the battery unit 20 from exploding or catching fire.

[0055] In the battery unit 20, the inside of the housing 211 is used to accommodate the electrode assembly 22, and the electrode assembly 22 in the housing 211 may be configured as one or more according to actual usage needs. For example, Fig. 2 illustrates an example in which the battery unit 20 includes four electrode assemblies 22 arranged along the first direction X, but the embodiment of the present application is not limited thereto.

[0056] The electrode assembly 22 in the embodiment of the present application is a component where an electrochemical reaction occurs in the battery unit 20. The electrode assembly 22 may be a cylinder, a rectangle, or the like, and if the electrode assembly 22 has a cylindrical structure, the housing 211 may also have a cylindrical structure, and if the electrode assembly 22 has a rectangular structure, the housing 211 may also have a rectangular structure.

[0057] For any one of the electrode assemblies 22, the electrode assembly 22 may include a tab 222 and a main body 221. Specifically, as shown in Fig. 2, the electrode assembly 22 may include at least two tabs 222, and the two tabs 222 may include a positive electrode tab 222a that may be formed by stacking on a portion of a positive electrode plate where a positive electrode active material layer is not applied, and a negative electrode tab 222b that may be formed by stacking on a portion of a negative electrode plate where a negative electrode active material layer is not applied.

[0058] An electrode terminal 214 is further provided on the housing 21 in the embodiment of the present application to be electrically connected to the electrode assembly 22 so as to output the power of the battery unit 20. For example, as shown in FIG. 2, the battery unit 20 may further include at least two electrode terminals 214 that may be provided on the cover plate 212. The cover plate 212 has a generally flat plate shape, and the two electrode terminals 214 are fixed on the flat surface of the cover plate 212, and the two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 includes a connecting member that is located between the cover plate 212 and the electrode assembly 22 and that realizes the electrical connection between the electrode assembly 22 and the electrode terminal 214. 232, the positive electrode tab 222a of the electrode assembly 22 can be connected to the positive electrode terminal 214a by one connecting member 30, and the negative electrode tab 222b of the electrode assembly 22 is connected to the negative electrode terminal 214b by another connecting member 30.

[0059] It should be understood that the body 221 of the electrode assembly 22 in the embodiment of the present application may be formed by stacking a portion in which a positive electrode plate is coated with a positive electrode active material layer and a portion in which a negative electrode plate is coated with a negative electrode active material layer. In such a stacked electrode assembly 22, the electrode plates may be stacked in a number of ways.

[0060] Optionally, as one embodiment, Fig. 3 shows one possible cross-sectional schematic diagram of the electrode assembly 22 of the embodiment of the present application. The cross section is parallel to the first direction X. As shown in Fig. 3, the main body of the electrode assembly 22 includes a plurality of first electrode plates 221b and a plurality of second electrode plates 221a that are alternately stacked along the first direction X.

[0061] As shown in FIG. 3, the electrode assembly 22 further includes a separator 221c between the plates for insulating and isolating the adjacent first and second plates 221b and 221a.

[0062] In some embodiments, the stacked electrode assembly 22 may be stacked in other ways. Specifically, FIG. 4 shows another possible cross-sectional schematic view of the electrode assembly 22 of the embodiment of the present application. The cross-section is parallel to the first direction X. As shown in FIG. 4, the electrode assembly 22 includes a second electrode plate 221a and a plurality of first electrode plates 221b, the second electrode plate 221a includes a plurality of stacked segments 221d and a plurality of bent segments 221e, the bent segments 221e are used to connect two adjacent stacked segments 221d, and the plurality of first electrode plates 221b are alternately stacked with the plurality of stacked segments 221d along the first direction X.

[0063] As shown in FIG. 4, the electrode assembly 22 further includes separators 221c between the multiple plates for insulating and isolating the second plate 221a and the first plate 221b.

[0064] It should be understood that the second electrode plate 221a and the first electrode plate 221b in Fig. 3 and Fig. 4 are two electrodes with opposite polarity. For example, if the first electrode plate 221b is a positive electrode plate, the second electrode plate 221a is a negative electrode plate, and if the first electrode plate 221b is a negative electrode plate, the second electrode plate 221a is a positive electrode plate. Fig. 3-Fig. 4 shows a scheme in which the second electrode plate 221a is a negative electrode plate and the first electrode plate 221b is a positive electrode plate, in this way, the negative electrode plate covers the positive electrode plate, and lithium deposition can be avoided.

[0065] It should be understood that the method 100 of the embodiment of the present application can be used for any one of the electrode assemblies 22, and for ease of description, the following mainly takes the electrode assembly 22 shown in Fig. 4 as an example, i.e., correcting the tab corresponding to the positive electrode plate 221b shown in Fig. 4 as an example, but the embodiment of the present application is not limited thereto. For example, the method 100 can also be used for tab correction of the first electrode plate 221b and / or the second electrode plate 221a shown in Fig. 3, and will not be further described for brevity.

[0066] FIG. 5 shows an electrode assembly according to an embodiment of the present application. 22 3 shows a schematic diagram of an apparatus 300 for processing an electrode assembly 22 For example, the device 300 may be a lamination machine. FIG. 6 is a schematic diagram showing a cutting position of the first electrode assembly 2212 according to the embodiment of the present application. FIG. 6 shows only a part of the first electrode assembly 2212. In the following, the processing process of the electrode assembly 22 according to the embodiment of the present application will be described in detail in conjunction with FIG. 4 to FIG. 6.

[0067] As shown in FIG. 4 and FIG. 5, here, the first electrode plate assembly 2212 is used to cut and obtain a positive electrode plate 221b, that is, the first electrode plate 221b is a positive electrode plate, and the electrode assembly 22 includes a plurality of first pole plates 221b.

[0068] Correspondingly, the negative electrode plate 2211 is stacked alternately with the first electrode plate obtained by cutting to form an electrode assembly. 22 Specifically, as shown in Fig. 4 and Fig. 5, a plurality of scores 2211a and 2211b are alternately provided on the upper surface and the lower surface of the negative electrode plate 2211, and a space between two adjacent scores of the plurality of scores 2211a and 2211b is a negative electrode plate region, and the negative electrode plate 2211 is used to be folded at the scores 2211a and 2211b so that the plurality of negative electrode plate regions and the plurality of positive electrode plates 221b are alternately stacked and provided along the first direction X.

[0069] 4 and 5, a plurality of scores 2211a and 2211b are alternately arranged on the upper and lower surfaces of the negative electrode plate 2211, where the score 2211a on the upper surface can be used to fold the negative electrode plate 2211 downward, and the score 2211b on the lower surface can be used to fold the negative electrode plate 2211 upward. Specifically, the electrode assembly formed after folding 22 5, each folded segment 221e of the negative electrode plate 2211 in FIG. 4 includes a score 2211a or 2211b of the negative electrode plate 2211 in FIG. 5, and at least a portion of the negative electrode plate area between two adjacent scores 2211a and 2211b in FIG. 5 is used to form a stacked segment 221d of the negative electrode plate 2211 in FIG. 4.

[0070] It should be understood that the spacing between the scores 2211a and 2211b alternately arranged on the upper and lower surfaces of the negative plate 2211 in the embodiment of the present application can be set according to the actual application, for example, according to the capacity required for the battery unit, and the embodiment of the present application is not limited thereto. In addition, the scores 2211a and 2211b alternately arranged on the upper and lower surfaces of the negative plate 2211 are uniformly distributed to ensure that the sizes of the obtained negative plate areas or stacked segments 221d are equal, and further ensure the quality of the electrode assembly.

[0071] Optionally, as shown in Figures 4-5, the method of fabricating the electrode assembly of the present embodiment or the method 100 of the present embodiment may further include coating a first separator 2213 and a second separator 2214 on the upper and lower surfaces of the negative electrode plate 2211 having the scores 2211a and 2211b, respectively. 22 When processing the negative electrode plate 2211 on which the scores 2211a and 2211b are installed, the upper surface of the negative electrode plate 2211 can be coated with the first separator 2213 and the lower surface of the negative electrode plate 2211 can be coated with the second separator 2214. For example, the device 300 may include a negative electrode composite roll 301, and the negative electrode plate 2211 coated with the first separator 2213 and the second separator 2214 is combined through the negative electrode composite roll 301.

[0072] Furthermore, the method for processing an electrode assembly of an embodiment of the present application or the method 100 of the embodiment of the present application may further include: sequentially placing the plurality of first electrode plates 221b after cutting on an upper surface of the first separator 2213 and a lower surface of the second separator 2214, such that one first electrode plate 221b is correspondingly placed in each of the plurality of negative electrode plate regions based on positions of the scores 2211a and 2211b of the negative electrode plate 2211, wherein the negative electrode plate 2211 is used to be folded at the scores, such that the plurality of negative electrode plate regions and the plurality of first electrode plates 221b are alternately stacked and placed along the first direction X, and the first separator 2213 and the second separator 2214 are used to separate each negative electrode plate region from a corresponding first electrode plate 221b.

[0073] As shown in Figures 4 and 5, a plurality of first electrode plates 221b can be obtained by cutting the first electrode plate assembly 2212, and based on the positions of the scores 2211a and 2211b of the negative electrode plate 2211, the plurality of first electrode plates 221b after cutting can be sequentially installed on the upper surface of the first separation membrane 2213 and the lower surface of the second separation membrane 2214, respectively. For example, the device 300 of the embodiment of the present application may include two sets of positive electrode sheeting mechanisms for cutting the first electrode assembly 2212, one set of the positive electrode sheeting mechanisms is used to cut one first electrode assembly 2212, and the first electrode plate 221b obtained after cutting is placed on the upper surface of the first separator 2213, and another set of the positive electrode sheeting mechanisms can be used to cut another first electrode assembly 2212, and the first electrode plate 221b obtained after cutting is placed on the lower surface of the second separator 2214. And the first electrode plates 221b cut by the two sets of positive electrode sheeting mechanisms are placed at intervals.

[0074] As shown in FIG. 4 and FIG. 5, the cut first electrode plate 221b, the first separator 2213, the negative electrode plate 2211 and the second separator 2214 are combined into a positive electrode composite roll 306, and then the positive electrode composite roll 306 is free-fall loaded to form an electrode assembly. 22 Specifically, the scores 2211a and 2211b are installed on the negative electrode plate 2211, so that the scores 2211a and 2211b are repeatedly bent in different directions during the process of free fall loading, and the electrode assembly shown in FIG. 22 can be formed.

[0075] Optionally, as shown in Fig. 5, for any one set of positive sheeting mechanisms in the embodiments of the present application, the positive sheeting mechanism may include a positive plate driving mechanism 303, a positive plate cutter 304 and a positive plate transmission mechanism 305. Specifically, the positive plate driving mechanism 303, the positive plate cutter 304 and the positive plate transmission mechanism 305 may be an interlocking device, for example, the servo shaft of the positive plate transmission mechanism 305 and the servo shaft of the positive plate cutter 304 are cam-coupled to the main shaft of the interlocking device, respectively. The main shaft of the interlocking device is moved according to a preset cam motion curve.

[0076] It should be understood that the main axis of the interlocking device is a virtual axis, and in an ideal state without error, the main axis rotates once (i.e., rotates 360°) periodically, the positive plate driving mechanism 303 completes cutting of one reference width of the first plate 221b, and the interlocking device completes one reciprocating motion. However, in the actual processing process, there may be problems such as tab misalignment, so the motion of the positive plate driving mechanism 303 is the matching motion of the main axis motion of the interlocking device and the compensation axis, where the compensation axis is also a virtual axis, and the tab misalignment adjustment in the embodiment of the present application can be realized by controlling the positive plate driving mechanism 303 to increase or decrease the cutting position of the first plate assembly 2212 in each circulation period.

[0077] The method 100 for correcting tab positions of an electrode assembly according to an embodiment of the present application will be described in detail below. The method 100 may include determining whether a positional deviation occurs in a plurality of consecutive tabs in a first plate assembly in step S110. Specifically, step S110 may include determining whether a positional deviation delay or a positional deviation advance occurs in the i-th tab based on a difference between the i-th position data of the i-th tab in the first plate assembly and preset position data, where the i-th position data indicates a relative positional relationship between the i-th tab and a preset reference material, where i is a positive integer, and determining that a positional deviation occurs in a plurality of consecutive tabs, from the i-th tab to the i+j-th tab, in the first plate assembly, if it is determined that a positional deviation delay or a positional deviation advance occurs in all of the i-th tab to the i+j-th tab. In other words, by determining whether there is a delay in positional misalignment or an advance in positional misalignment in all of the i-th tab through the (i+j)th tab, it is possible to determine whether misalignment will occur in multiple consecutive tabs, and if misalignment will occur in multiple consecutive tabs, the position at which the first plate assembly is cut can be quickly adjusted and the positions of the tabs can be adjusted.

[0078] It should be understood that the i-th tab in the embodiments of the present application is a tab of an uncut portion of the first plate assembly, and the i-th tab may be counted from the uncut portion, e.g., the i-th tab may represent the i-th tab of the uncut portion of the first plate assembly, or the i-th tab may be counted from the start portion of the first plate assembly, e.g., a tab before the i-th tab includes a tab of a cut portion and a tab of an uncut portion of the first plate assembly, and the embodiments of the present application are not limited thereto.

[0079] Optionally, before S110, the method 100 may further include determining the i-th position data, ie, determining the position of the i-th tab relative to a preset reference material.

[0080] Optionally, as shown in Fig. 5, the device 300 may include a tab detection sensor 302 that may be used to detect a tab. For example, the tab detection sensor 302 may be used to sense a tab and send a sensing signal to a processing unit when the tab is sensed, so that the processing unit can determine the position of the tab, where the processing unit may be a processor or controller, for example, the processing unit may be a Programmable Logic Controller (PLC), although embodiments of the present application are not limited thereto.

[0081] Specifically, the i-th tab in the embodiment of the present application may be any one of the tabs of the uncut portion of the first pole piece assembly 2212. The preset reference material in the embodiment of the present application may be selected according to the actual application. For example, as shown in FIG. 5, the preset reference material may be a negative plate area corresponding to the first plate where the i-th tab is located. For the uncut portion of the first pole piece assembly 2212, the first pole piece 221b corresponding to the i-th tab may be predetermined according to the cutting rule, and the negative plate area included in the negative plate 2211 corresponding to the first pole piece 221b may be determined. Therefore, the relative positional relationship between the i-th tab and the corresponding negative plate area may be determined as the i-th position data of the i-th tab. For example, the i-th position data may be an angle difference or distance difference between the central symmetry axis of the i-th tab and the central symmetry axis of the corresponding negative plate area, and the embodiment of the present application is not limited thereto. Here, the angle difference can be determined based on the rotation angle when the positive plate driving mechanism 303 does not perform any compensation movement, and the distance difference can be determined based on the rotation angle when the i-th tab does not perform any positional deviation compensation and the negative plate area is loaded to form an electrode assembly. 22 may be the distance difference between the central symmetry axis of the i-th tab and the central symmetry axis of the corresponding negative plate region.

[0082] It should be understood that if there is no tab misalignment problem of the first plate assembly 2212, the relative positions of the tabs of each first plate and the corresponding negative plate area are all the same, i.e., the i-th position data of the i-th tab is equal to the preset position data, but if there is a tab misalignment problem, the relative position of the i-th tab with respect to the corresponding negative plate area changes, i.e., the i-th position data of the i-th tab is different from the preset position data, e.g., larger or smaller than the preset position data.

[0083] Alternatively, as shown in FIG. 5, the preset reference material may be a score corresponding to the first plate where the i-th tab is located. Since the distribution interval of the multiple scores 2211a and 2211b of the negative plate 2211 is equal to the width of the negative plate area, the preset reference material may also be set as the scores 2211a and 2211b. Specifically, for the uncut portion of the first plate assembly 2212, the first plate 221b corresponding to the i-th tab can be predetermined according to the cutting rule, and the negative plate area included in the negative plate 2211 corresponding to the first plate 221b can be determined, and then the two scores adjacent to the negative plate area can both be preset reference materials. For example, when the first electrode plate 221b corresponding to the i-th tab is installed on the upper surface of the negative electrode plate 2211, the score 2211a located on the upper surface may be selected as the preset reference material from the two scores for forming the negative electrode plate area corresponding to the first electrode plate 221b, or the score between the negative electrode plate area and the previous negative electrode plate area may be selected as the preset reference material. Correspondingly, when the first electrode plate 221b corresponding to the i-th tab is installed on the lower surface of the negative electrode plate 2211, the score 2211b located on the lower surface may be selected as the preset reference material from the two scores for forming the negative electrode plate area corresponding to the first electrode plate 221b, or the score between the negative electrode plate area and the previous negative electrode plate area may be selected as the preset reference material. Here, the "previous negative electrode plate area" refers to the negative electrode plate area of ​​the negative electrode plate 2211 that has passed through the positive electrode composite roll 306 earlier.

[0084] Furthermore, the relative positional relationship between the i-th tab and the corresponding score 2211a or 2211b is determined as the i-th position data of the i-th tab. For example, the i-th position data may be an angle difference or distance difference between the central symmetry axis of the i-th tab and the corresponding score, and the embodiment of the present application is not limited thereto. Here, the angle difference can be determined based on the rotation angle when the positive plate driving mechanism 303 does not perform any compensation movement, and the distance difference can be determined based on the rotation angle when the i-th tab is loaded with the negative plate region to form an electrode assembly when the i-th tab does not perform any positional deviation compensation. 22 may be the distance difference between the central symmetry axis of the i-th tab and the corresponding score,

[0085] It should be understood that if there is no tab misalignment problem of the first plate assembly 2212, the relative positions of the tabs of each first plate and the corresponding score are all the same, i.e., the i-th position data of the i-th tab is equal to the preset position data, but if there is a tab misalignment problem, the relative position of the i-th tab to the corresponding score changes, i.e., the i-th position data of the i-th tab is different from the preset position data, e.g., larger or smaller than the preset position data.

[0086] Optionally, determining the i-th position data may include determining the time when the i-th tab is detected as a target time, and determining a positional relationship between the position of the i-th tab at the target time and a preset reference material as the i-th position data. There may be a time difference required for signal transmission between the time when the tab detection sensor 302 detects the tab and transmits a sensing signal to the processing unit and the time when the processing unit receives the signal. This time difference may cause the processing unit to not accurately determine the i-th position data of the i-th tab. Therefore, calculation errors can be reduced or avoided by adding a time stamp to the sensing signal transmitted when the tab detection sensor 302 detects the tab.

[0087] Specifically, the time when the i-th tab is detected is determined as the target time, i.e., the time when the tab detection sensor 302 detects the tab is determined as the target time, and the target time is recorded by adding a timestamp, or the like. A processing unit receives the tab detection signal and determines the target time based on the timestamp. When determining the target time, the positional relationship between the position of the i-th tab and the preset reference material is the i-th position data, and instead of calculating the time when the tab detection signal was received, the positional relationship between the position of the i-th tab and the preset reference material is the i-th position data, thereby preventing the time difference caused by the transmission of the detection signal from causing excessive calculation errors.

[0088] In the embodiment of the present application, in S110, it can be determined whether or not a delay in positional deviation or an advance in positional deviation will occur in the i-th tab based on the difference between the i-th position data of the i-th tab and preset position data. Specifically, if the difference between the i-th position data and the preset position data is equal to or greater than a fifth threshold value greater than zero, it is determined that a delay in positional deviation will occur in the i-th tab, and if the difference between the i-th position data and the preset position data is equal to or less than a sixth threshold value less than zero, it is determined that an advance in positional deviation will occur in the i-th tab.

[0089] It should be understood that in the embodiment of the present application, the difference between the i-th position data of the i-th tab and the preset position data is obtained by subtracting the preset position data from the i-th position data of the i-th tab, and the difference between the i-th position data of the i-th tab and the preset position data may be a positive number or a negative number.

[0090] If the difference between the i-th position data and the preset position data is equal to or greater than the fifth threshold, it indicates that the position of the i-th tab is too far from the preset reference material, i.e., the i-th tab is delayed in positioning compared to its correct position. Conversely, if the difference between the i-th position data and the preset position data is equal to or less than the sixth threshold, it indicates that the position of the i-th tab is too close to the preset reference material, i.e., the i-th tab is advanced in positioning compared to its correct position.

[0091] Optionally, the fifth and sixth thresholds in the embodiment of the present application can be set according to practical applications. For example, the absolute value of the fifth threshold can be set equal to the absolute value of the sixth threshold. For example, if the tab error does not excessively affect the performance of the electrode assembly, the possible range of the fifth threshold can be set as [0.3 mm, 2 mm], for example, the fifth threshold can be set as 0.5 mm (millimeter) or 1 mm. Similarly, the possible range of the sixth threshold can be [-2 mm, -0.3 mm], for example, the sixth threshold can be set as [-1 mm, -2 mm]. - 0.5mm or - It may be set as 1 mm.

[0092] In S120 of the embodiment of the present application, if it is determined that the consecutive tabs are misaligned, for example, that the i-th tab to the i+j-th tab are all delayed in misalignment or advanced in misalignment, the cutting position of the first plate assembly is adjusted to adjust the width and loading position of the first plate obtained after cutting, and the tabs of the first plate obtained after cutting the first plate assembly are aligned. Here, the number of consecutive tabs can be set according to the actual application, or the range of j can be set according to the actual application. For example, in order to avoid the occurrence of a phenomenon such as pleating or bending only in an individual tab, the correction process is usually performed on the tabs only when it is determined that the consecutive tabs are all delayed in misalignment or advanced in misalignment. For example, the j may be set as an integer of 1 or more, for example, j may be set as a numerical value such as 2, 5, or 8.

[0093] In the embodiment of the present application, the direction of cutting the first plate assembly indicates that in each cutting process of the first plate assembly, the first plate assembly is cut along the direction to obtain one first plate. 22 The first directions X of loading are perpendicular to each other or perpendicular to each other.

[0094] Specifically, S120 may include, if a delay in position shift occurs in all of the consecutive tabs and the number of the consecutive tabs is equal to or greater than a first threshold, delaying the cutting position of the first plate assembly to increase the width of the first plate obtained after cutting, and aligning the tabs of the first plate. For example, if the consecutive tabs are the i-th tab to the i+j-th tab, it is determined that a delay in position shift occurs in all of the i-th tab to the i+j-th tab, and j is equal to or greater than a first threshold, delaying the cutting position of the first plate assembly to increase the width of the first plate obtained after cutting, and adjusting the loading position of the first plate obtained after cutting, and aligning the tabs of the first plate. Optionally, the first threshold in the embodiment of the present application can be set according to practical applications, for example, the first threshold can be any positive integer, for example, the first threshold can be set as a value such as 2, 3, or 5. Furthermore, by setting the first threshold, when only individual tabs have a positional delay or problems such as wrinkles, it can be avoided to erroneously determine that the tabs need to be adjusted, and the accuracy of correction can be improved.

[0095] It should be understood that when determining whether the i-th tab will experience a delay in misalignment or an advance in misalignment, the first plate 221b corresponding to the i-th tab is not cut, and when determining whether the i+j-th tab will experience a delay in misalignment or an advance in misalignment, the first plate 221b corresponding to the i-th tab may not be cut or may have been cut. Therefore, after determining that the i-th to i+j-th tabs all experience a delay in misalignment, and when j is equal to or greater than a first threshold, the uncut portion of the first plate assembly 2212 may be adjusted. For example, the first plate 221b to be cut by the positive plate cutter 304 in the first plate assembly 2212 can be adjusted, i.e., the cutting position of the first plate 221b to be cut can be delayed to increase the width of the first plate obtained after cutting, thereby quickly adjusting the position of the tab of the first plate 221b having the delayed position shift problem; or the first plate 221b corresponding to the i+jth tab in the first plate assembly 2212 can be adjusted, i.e., the cutting position of the first plate 221b corresponding to the i+jth tab can be delayed to increase the width of the first plate obtained after cutting, thus avoiding tab position shift due to early adjustment in a situation where the part to be cut may not be delayed, but the embodiments of the present application are not limited thereto.

[0096] Optionally, when an adjustment is made to delay the cutting position for the first plate assembly 2212, the delayed cutting operation can be performed continuously, i.e., delayed cutting is performed continuously for multiple first plates 221b.

[0097] Optionally, when performing a delayed cutting operation on the first plate assembly 2212, the distance for delaying the cutting position of the first plate assembly can be set according to the actual application. For example, the distance for delaying the cutting position of the corresponding first plate assembly 2212 is a first preset distance, and the first preset distance is less than 5 / 1000 of the preset reference width of the first plate 221b, so as to avoid the delay distance being too large and the misalignment adjustment width being too large, and the original misalignment delay state being adjusted to the misalignment advance state, and still causing the electrode assembly to be processed poorly. In addition, the delay distance is too large and the width of the cut first plate 221b is too large, and the possibility of causing lithium precipitation during the use process of the battery unit 20 can be avoided. Here, the preset reference width of the first plate 221b is the original width of the first plate 221b when no delay or advance is applied to the first plate assembly 2212.

[0098] Optionally, performing a delayed cutting operation on the first plate assembly 2212 can be realized in multiple ways. For example, the rotation speed of the positive plate driving mechanism 303 can be accelerated to increase the rotation angle of the positive plate driving mechanism 303 within one circulating working cycle, and the cutting position of the positive plate cutter 304 can be delayed to increase the width of the cut first plate 221b, and the loading position of the first plate 221b can also be changed in the loading process, so that the originally delayed tab position can be compensated for, and the delayed tab position misalignment problem can be reduced or avoided.

[0099] Optionally, S120 may further include, specifically, if the consecutive tabs all have a misalignment advance, and if the number of the consecutive tabs is equal to or greater than a second threshold, advancing the cutting position of the first plate assembly to reduce the width of the first plate obtained after cutting, and aligning the tabs of the first plate. Still, taking the i-th tab to the i+j-th tab as an example, if it is determined that the i-th tab to the i+j-th tab all have a misalignment advance, and if j is equal to or greater than a second threshold, advancing the cutting position of the first plate assembly to reduce the width of the first plate obtained after cutting, and adjusting the loading position of the first plate obtained after cutting, and aligning the tabs of the first plate. Optionally, the second threshold in the embodiment of the present application can be set according to practical applications, for example, the second threshold can be any positive integer, for example, the second threshold can be equal to the first threshold, further for example, the second threshold can be set as a value such as 2, 3 or 5. Furthermore, by setting the second threshold, in a situation where only individual tabs are misaligned or when individual tabs have problems such as wrinkles, it can be avoided to erroneously determine that the tabs need to be adjusted, and the accuracy of correction can be improved.

[0100] It should be understood that, similar to the delay in misalignment, when determining whether the i-th tab will experience a delay in misalignment or an advance in misalignment, the first plate 221b corresponding to the i-th tab is not cut, and when determining whether the i+j-th tab will experience a delay in misalignment or an advance in misalignment, the first plate 221b corresponding to the i-th tab may not be cut or may have been cut. Therefore, when it is determined that the i-th tab to the i+j-th tab all experience an advance in misalignment, and j is equal to or greater than the second threshold, the uncut portion of the first plate assembly 2212 may be adjusted. For example, the first electrode plate 221b to be cut by the positive electrode plate cutter 304 in the first electrode plate assembly 2212 can be adjusted, i.e., the cutting position of the first electrode plate 221b to be cut can be advanced to reduce the width of the first electrode plate obtained after cutting, thereby quickly adjusting the position of the tab of the first electrode plate 221b having the problem of advancement of position misalignment; or the first electrode plate 221b corresponding to the i+jth tab in the first electrode plate assembly 2212 can be adjusted, i.e., the cutting position of the first electrode plate 221b corresponding to the i+jth tab can be advanced to reduce the width of the first electrode plate obtained after cutting; in this way, tab misalignment due to early adjustment can be avoided in a situation where the portion to be cut may not have progressed, but the embodiments of the present application are not limited thereto.

[0101] Optionally, when an adjustment is made to advance the cutting position for the first plate assembly 2212, the forward cutting operation can be performed continuously, i.e., forward cutting is performed continuously for a plurality of first plate assemblies 221b.

[0102] Optionally, take FIG. 6 as an example, FIG. 6 shows an uncut portion of the first electrode assembly 2212, where the dashed lines in FIG. 6 indicate preset cutting positions, so that if cutting is actually performed according to the dashed line positions, the tab positions in FIG. 6 will be advanced, and the electrode assembly obtained by processing will be 22This will cause serious positional deviation of the tab. Therefore, it is necessary to perform a forward operation. Here, taking the need to start a forward cutting process for the first electrode plate 221b corresponding to the m-th tab as an example, the cutting position of the first electrode plate 221b corresponding to the m-th tab in the first electrode plate assembly 2212, which is cut according to the original width H, is advanced, and the advance distance is ΔH, and the width of the first electrode plate 221b actually obtained by cutting is made smaller than the original preset width H. Similarly, an operation of advancing the cutting position can be performed for the first electrode plate 221b corresponding to the m+1-th tab, and the advance distance can still be set as ΔH. By sequentially deducing analogy, a forward cutting operation can be performed for the first electrode plate 221b corresponding to the subsequent multiple tabs, for example, FIG. 6 takes as an example a forward cutting operation for the first electrode plate 221b corresponding to at least four tabs. In this way, the original broken line cutting position is changed to actually cutting according to the solid line position corresponding to the broken line, thereby solving the problem of the tab being advanced, and the electrode assembly obtained by processing can be obtained. 22 This can avoid malfunctions.

[0103] Alternatively, when performing a forward cutting operation on the first plate assembly 2212, the distance by which the cutting position of the first plate assembly is advanced can be set according to actual application. For example, the distance by which the cutting position of the first plate assembly 2212 is advanced is a second preset distance, and the second preset distance is less than 5 / 1000 of the preset reference width of the first plate 221b, so that the advance distance is too large and the misalignment adjustment width is too large, and the original misalignment advance state is adjusted to a misalignment delay state, so as not to cause defective processing of the electrode assembly. Also, the advance distance is too large and the width of the first plate 221b is too small, so that the electrode assembly 22After being grouped into the battery unit 20, it is possible to avoid serious impact on the capacity of the battery unit 20. Here, the preset reference width of the first plate 221b is the original width of the first plate 221b when no delay or advance is performed on the first plate assembly 2212. For example, the preset cutting position shown by the dashed line in the first plate assembly 2212 in FIG. 6 is the position when no delay processing of advance or position shift is performed, and then the preset reference width is equal to the width H.

[0104] Optionally, the forward cutting operation on the first plate assembly 2212 can be realized in multiple ways. For example, by slowing down the rotation speed of the positive plate driving mechanism 303, the rotation angle of the positive plate driving mechanism 303 can be reduced within one circulating working cycle, and the cutting position of the positive plate cutter 304 can be advanced to reduce the width of the cut first plate 221b, and in the loading process, the loading position of the first plate 221b can also be changed, so that the originally advanced tab position can be compensated for, and the advance misalignment problem of the tab misalignment can be reduced or avoided.

[0105] In the embodiment of the present application, the step S120 may further include stopping the operation of advancing the cutting position of the first plate assembly if the consecutive tabs all have a positional delay and the number of the consecutive tabs is equal to or greater than a third threshold, which is equal to or less than the first threshold. Still, taking the i-th tab to the i+j-th tab as an example, if it is determined that the i-th tab to the i+j-th tab all have a positional delay and j is equal to or greater than the third threshold, the operation of advancing the cutting position of the first plate assembly is stopped. Optionally, the third threshold of the embodiment of the present application may be set according to the actual application, for example, the third threshold may be set as any positive integer equal to or less than the first threshold, for example, the third threshold may be set as a value such as 2, 3, or 5.

[0106] It should be understood that, based on the processing process and the tab forming method of the first plate assembly 2212, in the process of continuous cutting, if it is determined according to the above method 100 that the i-th tab to the i+j-th tab all have a delayed position shift or an advanced position shift, all the tabs after the i+j-th tab may also have a delayed position shift or an advanced position shift, so that the tab position correction can be continuously performed on the first plate assembly 2212, i.e., the corresponding delayed cutting operation or advanced cutting operation can be continuously performed.

[0107] However, there may be other circumstances in the process of tab correction. For example, in the process of performing a forward cutting operation on the first plate assembly 2212 to correct the tabs, if it is determined that a delay in misalignment occurs in a number of consecutive tabs that have not been cut, the original forward cutting operation should be stopped to avoid continuing to perform the forward cutting operation and causing tab misalignment. That is, if it is determined that a delay in misalignment occurs in all of the i-th tab to the i+j-th tab, and j is equal to or greater than a third threshold that is equal to or less than the first threshold, the operation of advancing the cutting position of the first plate assembly 2212 can be stopped first. In this way, if misalignment delay still occurs in the i+j+1 tabs after the i+j-th tab, then based on the number of tabs that subsequently experience successive misalignment delays and the first threshold, a delayed cutting operation can be selected to be performed and the tabs corrected; alternatively, if neither misalignment delay nor misalignment advance occurs in the i+j+1 tabs after the i+j-th tab, the currently performed forward cutting operation can be stopped and there is no need to perform a delayed cutting operation, and the tab may be positioned in the normal position.

[0108] Similarly, in the embodiment of the present application, the step S120 may further include stopping the operation of delaying the cutting position of the first plate assembly if the advance of the positional deviation occurs in all of the consecutive tabs and if the number of the consecutive tabs is equal to or greater than a fourth threshold value that is equal to or less than the second threshold value. Still, taking the i-th tab to the i+j-th tab as an example, if it is determined that the advance of the positional deviation occurs in all of the i-th tab to the i+j-th tab and if j is equal to or greater than the fourth threshold value, the operation of delaying the cutting position of the first plate assembly is stopped. Optionally, the fourth threshold value in the embodiment of the present application may be set according to the actual application, for example, the fourth threshold value may be set as any positive integer equal to or less than the second threshold value, for example, the fourth threshold value may be set as a numerical value such as 2, 3, or 5. For example, the fourth threshold value may be equal to the third threshold value.

[0109] In the process of performing the delayed cutting operation on the first plate assembly 2212 to correct the tabs, if it is determined that the consecutive tabs that are not cut will advance, the original delayed cutting operation should be stopped to avoid continuing to perform the delayed cutting operation and causing tab misalignment. That is, if it is determined that the i-th tab to the i+j-th tab all have misalignment advance, and j is equal to or greater than the fourth threshold value that is equal to or less than the second threshold value, the operation of delaying the cutting position of the first plate assembly 2212 can be stopped first. In this way, if misalignment advance still occurs in the i+j+1 tabs after the i+j-th tab, the execution of the forward cutting operation is selected according to the number of tabs that will subsequently have misalignment advance and the second threshold value, and the tabs are corrected; or if the i+j+1 tabs after the i+j-th tab do not have misalignment advance or misalignment delay, the currently performed delayed cutting operation can be stopped, and there is no need to perform the forward cutting operation, and the tabs may be positioned at the normal position.

[0110] The following will take the method 100 of the embodiment of the present application as an example in conjunction with a specific embodiment. Figure 7 shows a schematic flow chart of a method 400 for correcting tab positions of an electrode assembly of the embodiment of the present application, where the method 400 may be a specific application of the method 100. As shown in Figure 7, the method 400 includes initializing, i.e., adjusting the tab positions of the electrode assembly. 22 Initialize the equipment for machining the electrode assembly 22 For example, the step 401 may include initializing the device 300 and processing the electrode assembly. 22 Processing can then begin.

[0111] As shown in FIG. 7, the method 400 may further include step 402 of starting the positive electrode sheeting mechanism, i.e., turning on the equipment for performing a cutting process on the positive electrode plate, for example, turning on the tab detection sensor 302, the positive electrode plate driving mechanism 303, the positive electrode plate cutter 304 and the positive electrode plate transmission mechanism 305 in the equipment 300, and starting to cut the positive electrode plate, i.e., cutting the first electrode plate assembly 2212, and obtaining a plurality of first electrode plates 221b.

[0112] 7, the method 400 may further include a step 403 of detecting a tab signal, i.e., sensing a tab of an uncut portion of the first plate assembly 2212 by the tab detection sensor 302, and detecting and acquiring a tab signal. For example, take the tab detection sensor 302 as sensing the i-th tab of the first plate assembly 2212.

[0113] 7, the method 400 may further include step 404 of adding a time stamp, i.e., when the tab detection sensor 302 senses an ith tab signal, a time stamp is added to the signal to indicate a target time when the ith tab is detected, so that a processing unit receiving the signal can determine ith position data of the ith tab based on the target time, where the ith position data indicates a relative position between the ith tab and a preset reference material.

[0114] Optionally, the manner of determining the i-th position data of the i-th tab is applied in the description of the corresponding step in the method 100 and will not be described further.

[0115] 7, the method 400 may further include a step 405 of calculating a difference, i.e., calculating the difference between the i-th position data and a preset position data, which applies to the description of the corresponding step in the method 100 and will not be described further.

[0116] As shown in FIG. 7 , the method 400 may further include step 406 of comparing the difference with a threshold, i.e., comparing the difference between the i-th position data and the preset position data with a fifth threshold and a sixth threshold, respectively, and continuing to perform step 411 or step 421.

[0117] 7, the method 400 may further include step 411: if difference≧fifth threshold, i.e., the difference between the i-th position data and the preset position data is equal to or greater than a fifth threshold greater than zero, continue to perform step 412. For example, the fifth threshold may be set as 0.3 mm or 0.5 mm.

[0118] 7, the method 400 may further include step 412 of incrementing the misalignment lag count by 1, i.e., if the difference between the i-th position data and the preset position data is equal to or greater than a fifth threshold, it may be determined that the i-th tab has a misalignment lag, and thus the misalignment lag count may be incremented by 1. For example, if the i-th tab is the first tab that begins to be detected and has a misalignment lag, the misalignment lag count will increase from 0 to 1, and by analogy, the number of tabs that have a misalignment lag in succession is calculated.

[0119] It should be understood that if it is determined that one or more consecutive tabs experience a misalignment delay, but the number of tabs does not exceed the third threshold, the misalignment delay count is cleared if no tabs experience a misalignment delay. Step 413 is performed until the calculated number of consecutive tabs experience a misalignment delay is equal to or greater than the third threshold.

[0120] 7, the method 400 may further include step 413 of continuing to perform step 414 if the number of misalignment delays≧a third threshold, i.e., the number of tabs that continuously experience misalignment delays is equal to or greater than the third threshold. For example, the third threshold may be set as 2 or 3.

[0121] 7, the method 400 may further include step 414 of stopping the forward cutting, i.e., stopping the forward cutting operation on the first plate assembly 2212. It should be understood that currently, the first plate assembly 2212 may already perform a forward cutting correction process, so the forward cutting operation can be stopped in step 414. Or, currently, the first plate assembly 2212 may not perform any forward cutting correction process, so step 414 may not be performed, and the number of tabs that continuously occur the misalignment delay is continuously counted until the number is equal to or greater than the first threshold, and step 415 is continuously performed.

[0122] 7, the method 400 may further include step 415 of continuing to perform step 416 if the number of misalignment delays≧a first threshold, i.e., the number of tabs that experience consecutive misalignment delays is equal to or greater than the first threshold. For example, the first threshold may be set as 3 or 5. For example, the first threshold may be greater than a third threshold.

[0123] As shown in FIG. 7 , the method 400 may further include step 416 of delaying cutting, i.e., if it is determined that a delay in misalignment of the tab of the first plate assembly 2212 occurs and the tab position needs to be adjusted, the width of the first plate 221b obtained by cutting can be increased in a manner of delaying the cutting position, and the position of the first plate 221b when subsequently loaded can be changed to further achieve tab correction.

[0124] Optionally, the delay distance of the delayed cutting operation can be set according to practical application. For example, the delay distance can be set as 1 mm or 0.5 mm. For example, the delay distance can be smaller than a fifth threshold. For example, the delay distance can be set according to the time required for the loaded electrode assembly to be cut. 22 The width of the positive electrode plate 221b in the stacked electrode assembly can be made smaller than the width of the corresponding stacked segment 221d to avoid lithium deposition, for example. 22 The width of the positive electrode plate 221b in the stacked segment 221a can be made smaller than the difference between the width of the positive electrode plate 221b and the width of the corresponding stacked segment 221d, and the possible range is [4 mm, 6 mm].

[0125] 7, contrary to step 411, the method 400 may further include step 421: if difference≦sixth threshold, i.e., the difference between the i-th position data and the preset position data is equal to or smaller than a sixth threshold less than zero, continue to execute step 422. For example, the sixth threshold may be set as −0.3 mm or −0.5 mm.

[0126] 7, the method 400 may further include step 422 of adding 1 to the misalignment advance count, i.e., if the difference between the i-th position data and the preset position data is less than or equal to a fifth threshold, it is determined that the i-th tab has misalignment advance, and therefore the misalignment advance count may be added 1. For example, if the i-th tab is the first tab that begins to be detected and in which misalignment advance occurs, the misalignment advance count increases from 0 to 1, and by analogy, the number of tabs that continuously experience misalignment advance is calculated.

[0127] It should be understood that if it is determined that one or more consecutive tabs experience misalignment advance but the number of tabs does not exceed the fourth threshold, the misalignment advance count is cleared if no tabs experience misalignment advance. Step 423 is performed until the calculated number of consecutive tabs experience misalignment advance is equal to or greater than the fourth threshold.

[0128] 7, the method 400 may further include step 423 of continuing to perform step 425 if the misalignment advance number≧a fourth threshold, i.e., the number of tabs for which misalignment advance occurs consecutively is equal to or greater than the fourth threshold. For example, the fourth threshold may be set as 2 or 3.

[0129] As shown in Fig. 7, the method 400 may further include step 424 of stopping the delayed cut, i.e., stopping the operation of the delayed cut for the first plate assembly 2212. It should be understood that currently, the first plate assembly 2212 may already be performing the correction process of the delayed cut, for example, the tab of the first plate assembly 2212 has previously experienced a misalignment delay, and the delayed cut operation needs to be performed to correct the tab, so the delayed cut operation can be stopped in step 424. Or, currently, the first plate assembly 2212 may not be performing any correction process of the delayed cut, so the step 424 may not be performed, and the number of tabs that continuously experience misalignment progression is continuously counted until the number is equal to or greater than the second threshold, and the step 425 is continuously performed.

[0130] 7, the method 400 may further include step 425 of continuing to perform step 426 if the misalignment advance number≧second threshold, i.e., the number of tabs for which misalignment advance occurs consecutively is equal to or greater than the second threshold. For example, the second threshold may be set as 3 or 5. For example, the second threshold may be greater than the fourth threshold.

[0131] As shown in FIG. 7 , the method 400 may further include step 426 of advancing the cutting, i.e., if it is determined that the tab of the first plate assembly 2212 has become misaligned and needs to be adjusted, the width of the first plate 221b obtained by cutting can be reduced by advancing the cutting position, and the position of the first plate 221b when subsequently loaded can be changed to further achieve tab correction.

[0132] Optionally, the advance distance of the advance cutting operation can be set according to the actual application. For example, the advance distance can be set as 1 mm or 0.5 mm. For example, the advance distance can be smaller than a sixth threshold value. For example, the advance distance can be set to 1 mm or 0.5 mm ... 22The width of the positive electrode plate 221b in the stacked electrode assembly can be made smaller than the width of the corresponding stacked segment 221d to avoid lithium deposition, for example. 22 The width of the positive electrode plate 221b in the stacked segment 221a can be made smaller than the difference between the width of the positive electrode plate 221b and the width of the corresponding stacked segment 221d, and the possible range is [4 mm, 6 mm].

[0133] Therefore, the method 400 for correcting tab positions of an electrode assembly in an embodiment of the present application can determine whether a tab will have a delayed or advanced positional deviation by determining the relative relationship between each tab and a preset reference material; when a plurality of consecutive tabs have a delayed or advanced positional deviation, a plurality of first plates with different widths can be obtained by adjusting the cutting position of the first plate, and the loading positions of the plurality of first plates can be adjusted, and the relative positions of the tabs can be adjusted, so that the tabs that are originally delayed or advanced in positional deviation can be adjusted to be approximately aligned, thereby avoiding the problem of poor processing of the electrode assembly due to tab position deviation, i.e., avoiding the problem of poor processing of the individual battery, and further improving the processing efficiency and product quality of the individual battery.

[0134] The above describes in detail the methods 100 and 400 for correcting the tab position of an electrode assembly according to an embodiment of the present application in conjunction with the accompanying drawings. Below, the following describes an apparatus for correcting the tab position of an electrode assembly according to an embodiment of the present application in conjunction with the accompanying drawings.

[0135] FIG. 8 shows a schematic block diagram of an apparatus 500 for correcting tab positions of an electrode assembly according to an embodiment of the present application. The electrode assembly includes negative and positive plates stacked alternately along a first direction. As shown in FIG. 8, the apparatus 500 according to an embodiment of the present application includes a processing unit 510 and a plate cutting unit 520. Specifically, the processing unit 510 is used to determine whether or not a misalignment occurs in consecutive tabs in a first plate assembly, and if a misalignment occurs in consecutive tabs, adjust the position at which the plate cutting unit 520 cuts the first plate assembly, thereby adjusting the width of the first plate, which is a negative plate or a positive plate, obtained after cutting, and aligning the tabs of the first plate obtained after cutting the first plate assembly.

[0136] Optionally, as an embodiment, the processing unit 510 is used to delay the position at which the plate cutting unit 520 cuts the first plate assembly, thereby increasing the width of the first plate obtained after cutting, and aligning the tabs of the first plate, if a delay in misalignment occurs in any of the consecutive tabs and the number of the consecutive tabs is equal to or greater than a first threshold; and / or to advance the position at which the plate cutting unit 520 cuts the first plate assembly, thereby decreasing the width of the first plate obtained after cutting, and aligning the tabs of the first plate, if a delay in misalignment occurs in any of the consecutive tabs and the number of the consecutive tabs is equal to or greater than a second threshold.

[0137] Optionally, as one embodiment, the distance by which the cutting position of the first plate assembly is delayed is a first preset distance, the first preset distance being less than or equal to 5 / 1000 of the preset reference width of the first plate, and / or the distance by which the cutting position of the first plate assembly is advanced is a second preset distance, the second preset distance being less than or equal to 5 / 1000 of the preset reference width of the first plate.

[0138] Optionally, as one embodiment, the processing unit 510 is used to stop the operation of the plate cutting unit 520 to advance the position at which the first plate assembly is cut if a delay in position shift occurs in any of the consecutive tabs and the number of the consecutive tabs is equal to or greater than a third threshold value that is equal to or less than the first threshold value, and / or to stop the operation of the plate cutting unit 520 to delay the position at which the first plate assembly is cut if a delay in position shift occurs in any of the consecutive tabs and the number of the consecutive tabs is equal to or greater than a fourth threshold value that is equal to or less than the second threshold value.

[0139] Optionally, in one embodiment, the first threshold is equal to the second threshold.

[0140] Optionally, as an embodiment, the processing unit 510 is used to determine whether a delay in misalignment or an advance in misalignment occurs in the i-th tab in the first plate assembly based on a difference between the i-th position data of the i-th tab in the first plate assembly and preset position data, where the i-th position data indicates a relative positional relationship between the i-th tab and the preset reference material, where i is a positive integer; and if it is determined that a delay in misalignment or an advance in misalignment occurs in all of the i-th tab to the i+j-th tab, determine that misalignment occurs in a series of tabs, from the i-th tab to the i+j-th tab, in the first plate assembly.

[0141] Optionally, as one embodiment, the processing unit 510 is used to determine that a delay in positional deviation occurs in the i-th tab if the difference between the i-th position data and the preset position data is equal to or greater than a fifth threshold value greater than zero, and to determine that a progress in positional deviation occurs in the i-th tab if the difference between the i-th position data and the preset position data is equal to or less than a sixth threshold value less than zero.

[0142] Optionally, as one embodiment, the processing unit 510 is also used to determine the i-th position data.

[0143] Optionally, as one embodiment, the processing unit 510 is used to determine the time when the i-th tab is detected as a target time, and to determine the positional relationship between the position of the i-th tab at the target time and a preset reference material as the i-th position data.

[0144] Optionally, as one embodiment, the first plate is a positive plate, and the electrode assembly includes a plurality of the first plates.

[0145] Optionally, as one embodiment, a plurality of scores are alternately arranged on the upper and lower surfaces of the negative electrode plate, and a negative electrode plate area is between two adjacent scores among the plurality of scores, and the negative electrode plate is used to be folded at the scores so that a plurality of negative electrode plate areas and a plurality of positive electrode plates are alternately arranged and stacked along a first direction.

[0146] Optionally, as one embodiment, the device 500 further includes a first composite unit for respectively coating a first separator and a second separator on the upper and lower surfaces of a negative plate having a score, and a second composite unit for sequentially placing the plurality of first plates after cutting on the upper surface of the first separator and the lower surface of the second separator, so that one first plate is correspondingly placed in each negative plate region among the plurality of negative plate regions based on the score position of the negative plate, the negative plate is used to be folded at the score so that the plurality of negative plate regions and the plurality of first plates are alternately stacked and placed along the first direction, and the first separator and the second separator further include a second composite unit for separating each negative plate region from the corresponding first plate.

[0147] Optionally, as one embodiment, the preset reference material is the negative plate area of ​​the i-th position data of the i-th tab in the first plate assembly corresponding to the first plate on which the i-th tab is located, or a score corresponding to the first plate on which the i-th tab is located.

[0148] It should be understood that the device 500 according to the embodiment of the present application can correspond to performing the methods 100 and 400 in the embodiments of the present application, the above and other operations and / or functions of each unit in the device 500 are used to realize the corresponding flows in the methods 100 and 400, respectively, and the device 300 in the embodiment of the present application may include the device 500, which will not be further described for the sake of brevity.

[0149] For example, the electrode plate cutting unit 520 in the device 500 corresponds to the interlocking device of the device 300, and for example, the electrode plate cutting unit 520 may include a positive electrode plate cutter 304 and a positive electrode plate transmission mechanism 305, but the embodiment of the present application is not limited thereto.

[0150] Further, for example, the first composite unit in the device 500 may be the negative electrode composite roll 301 in the device 300, and the second composite unit in the device 500 may be the positive electrode composite roll 306 in the device 300, but the embodiments of the present application are not limited thereto.

[0151] It should be understood that the processing unit of the embodiment of the present application can be an integrated circuit chip having the ability to process signals. In the implementation process, each step of the embodiment of the above method can be completed by an integrated logic circuit of hardware or an instruction in the form of software in the processing unit. For example, the processing unit can be a PLC, but the embodiment of the present application is not limited thereto.

[0152] As shown in FIG. 9, the present application further provides an apparatus 600 for correcting tab positions of an electrode assembly, which may include a processor 610 for calling a computer program and executing the methods 100 and 400 in the embodiments of the present application, and a memory 620 for storing the computer program.

[0153] The device 600 performs a specific process of correcting the tabs of the electrode assembly, which may be referred to in the description of the methods 100 and 400 in the respective embodiments of this application, and will not be described further for the sake of brevity.

[0154] It should be understood that the processor 610 in the embodiment of the present application may be an integrated circuit chip having a signal processing capability. In the process of implementation, each step of the embodiment of the above method may be completed by an integrated logic circuit of hardware or an instruction in the form of software in the processor 610.

[0155] As can be appreciated, memory 620 in embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.

[0156] The embodiment of the present application further provides a computer-readable storage medium for storing a computer program. Optionally, the computer-readable storage medium can be applied to the device 300 or the device 500 in the embodiment of the present application, and the computer program allows a computer to execute the corresponding flow of each method in the embodiment of the present application, and will not be further described for the sake of brevity.

[0157] The present embodiment further provides a computer program product including computer program commands, which can be optionally applied to the device 300 or the device 500 in the present embodiment, and the computer program commands make a computer execute the corresponding flow of each method in the present embodiment, and will not be further described for the sake of brevity.

[0158] The embodiment of the present application further provides a computer program, which can be optionally applied to the device 300 or device 500 in the embodiment of the present application, and when the computer program runs on a computer, the computer can execute the corresponding flow of each method in the embodiment of the present application, which will not be described further for the sake of brevity.

[0159] Although the present application has been described with reference to the preferred embodiments, various improvements can be made thereto and the elements therein can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural contradiction, any of the technical features mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions included in the claims.

Claims

1. 1. A method for correcting a tab position of an electrode assembly, comprising: The electrode assembly includes negative and positive electrode plates stacked alternately along a first direction, and the method includes: determining whether misalignment occurs in successive tabs during a first plate assembly; If a positional deviation occurs among the continuous tabs, the cutting position of the first plate assembly is adjusted to adjust the width of the first plate, which is a negative plate or a positive plate, obtained after cutting, and align the tabs of the first plate obtained after cutting the first plate assembly; The method of determining whether misalignment of consecutive tabs occurs in the first plate assembly includes: Adding a time stamp to a detection signal transmitted when the tab detection sensor detects an i-th tab signal in the first plate assembly, and determining a time when the i-th tab is detected as a target time based on the time stamp; determining a positional relationship between a position of the i-th tab at the target time and a preset reference material as the i-th position data; Determining whether a delay in positional deviation or an advance in positional deviation occurs in the i-th tab of the first electrode plate assembly based on a difference between the i-th position data of the i-th tab of the first electrode plate assembly and preset position data, the i-th position data indicating a relative positional relationship between the i-th tab and the preset reference material, where i is a positive integer; if it is determined that the i-th tab to the (i+j)-th tab all have a delayed misalignment or a leading misalignment, determining that the consecutive tabs, which are the i-th tab to the (i+j)-th tab, are misaligned in the first plate assembly; The above-mentioned aligning the tabs of the plurality of first plates obtained after cutting the first plate assembly includes: based on a determination that misalignment occurs in the consecutive plurality of tabs, the i th tab through the i+j th tab, during the first plate assembly.

13. A method for correcting a tab position of an electrode assembly, comprising:

2. A method for correcting a tab position of an electrode assembly, comprising: The electrode assembly includes negative and positive electrode plates stacked alternately along a first direction, and the method includes: determining whether misalignment occurs in successive tabs during a first plate assembly; If a positional deviation occurs among the continuous tabs, the cutting position of the first plate assembly is adjusted to adjust the width of the first plate, which is a negative plate or a positive plate, obtained after cutting, and align the tabs of the first plate obtained after cutting the first plate assembly; If the above-mentioned positional deviation occurs in the continuous plurality of tabs, the cutting position of the first electrode plate assembly can be adjusted. if a delay in positional deviation occurs in any of the consecutive tabs and if the number of the consecutive tabs is equal to or greater than a first threshold value, delaying a cutting position of the first plate assembly to increase a width of the first plate obtained after cutting, thereby aligning the tabs of the multiple first plate; If the advancement of positional misalignment occurs in any of the consecutive tabs and if the number of the consecutive tabs is equal to or greater than a second threshold value, advancing a cutting position of the first plate assembly to reduce a width of the first plate obtained after cutting, thereby aligning the tabs of the first plate.

13. A method for correcting a tab position of an electrode assembly, comprising:

3. The distance by which the cutting position of the first plate assembly is delayed is a first preset distance, and the first preset distance is less than or equal to 5 / 1000 of the preset reference width of the first plate; and / or a distance by which the cutting position of the first plate assembly is advanced is a second preset distance, the second preset distance being equal to or less than 5 / 1000 of a preset reference width of the first plate; 3. The method of claim 2 .

4. If the above-mentioned positional deviation occurs in the continuous plurality of tabs, the cutting position of the first electrode plate assembly can be adjusted. If a delay in positional deviation occurs in any of the consecutive tabs, and if the number of the consecutive tabs is equal to or greater than a third threshold value that is equal to or less than the first threshold value, stopping the operation of advancing the cutting position of the first plate assembly; and / or and stopping an operation of delaying the cutting position of the first plate assembly when the advancement of positional misalignment occurs in all of the consecutive tabs and when the number of the consecutive tabs is equal to or greater than a fourth threshold value that is equal to or less than the second threshold value.

3. The method of claim 2 .

5. The first threshold is equal to the second threshold. The method according to any one of claims 2 to 4.

6. Determining whether or not a delay in positional deviation or an advance in positional deviation occurs in the i-th tab based on the difference between the i-th position data of the i-th tab in the first electrode plate assembly and the preset position data, as described above, determining that a positional delay occurs in the i-th tab if a difference between the i-th position data and a preset position data is equal to or greater than a fifth threshold value greater than zero; and determining that the i-th tab is misaligned if a difference between the i-th position data and preset position data is equal to or smaller than a sixth threshold value that is smaller than zero.

2. The method of claim 1 .

7. the first plate is a positive plate, and the electrode assembly includes the plurality of first plates; 5. The method according to claim 1, wherein the first and second electrodes are arranged in a first direction.

8. A plurality of scores are alternately provided on the upper surface and the lower surface of the negative electrode plate, and a portion between two adjacent scores among the plurality of scores is a negative electrode plate region, and the negative electrode plate is used to be folded at the scores so that a plurality of negative electrode plate regions and a plurality of the positive electrode plates are alternately stacked and provided along the first direction.

8. The method of claim 7.

9. The method comprises: coating a first separator and a second separator on an upper surface and a lower surface of the negative electrode plate having a score, respectively; The method further includes: sequentially placing the cut first plates on the upper surface of the first separator and the lower surface of the second separator so that one first plate is placed in each of the negative plate regions among the negative plate regions based on score positions of the negative plate; the negative plate is used to be folded at the score so that the negative plate regions and the first plates are alternately stacked and placed along the first direction; and the first separator and the second separator are used to separate each negative plate region from a corresponding first plate.

9. The method of claim 8.

10. The preset reference material for determining the i-th position data of the i-th tab in the first plate assembly is: a negative plate area corresponding to the first plate on which the i-th tab is located, or is the score corresponding to the first plate on which the i-th tab is located.

9. The method of claim 8.

11. 1. An apparatus for correcting tab positions of an electrode assembly, comprising: The electrode assembly includes negative and positive electrode plates stacked alternately along a first direction, and the device includes a processing unit and an electrode cutting unit; The processing unit includes: determining whether misalignment occurs in successive tabs during a first plate assembly; if a positional deviation occurs among the successive tabs, the position at which the plate cutting unit cuts the first plate assembly is adjusted to adjust the width of the first plate, which is a negative plate or a positive plate, obtained after cutting, and to align the tabs of the first plate obtained after cutting the first plate assembly; The method of determining whether misalignment of consecutive tabs occurs in the first plate assembly includes: Adding a time stamp to a detection signal transmitted when the tab detection sensor detects an i-th tab signal in the first plate assembly, and determining a time when the i-th tab is detected as a target time based on the time stamp; determining a positional relationship between a position of the i-th tab at the target time and a preset reference material as the i-th position data; Determining whether a delay in positional deviation or an advance in positional deviation occurs in the i-th tab of the first electrode plate assembly based on a difference between the i-th position data of the i-th tab of the first electrode plate assembly and preset position data, the i-th position data indicating a relative positional relationship between the i-th tab and the preset reference material, where i is a positive integer; if it is determined that the i-th tab to the (i+j)-th tab all have a delayed misalignment or a leading misalignment, determining that the consecutive tabs, which are the i-th tab to the (i+j)-th tab, are misaligned in the first plate assembly; The above-mentioned aligning the tabs of the plurality of first plates obtained after cutting the first plate assembly includes: based on a determination that misalignment occurs in the consecutive plurality of tabs, the i th tab through the i+j th tab, during the first plate assembly.

1. An apparatus for correcting tab positions of an electrode assembly, comprising:

12. A method for storing a computer program for causing a computer to carry out the method according to any one of claims 1 to 4, A computer-readable storage medium comprising:

13. used to fabricate an electrode assembly including negative and positive electrode plates stacked alternately along a first direction; A device for correcting the tab position of the electrode assembly of claim 11. A lamination machine characterized by:

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