Electrode sheet inspection control system

Abstract

An electrode sheet inspection control system (100). The electrode sheet inspection control system (100) is applied to an electrode sheet coating system. The electrode sheet coating system comprises an unwinding device (101), a first surface coating device (102), a first surface drying device (103) and a winding device (104) arranged in sequence. The electrode sheet inspection control system (100) comprises a first measurement device (105); the first measurement device (105) is arranged between the unwinding device (101) and the first surface coating device (102), and the first measurement device (105) is used for measuring the size of an area to be coated on a first surface of an electrode sheet substrate output by the unwinding device (101), the first surface being perpendicular to the thickness direction of the electrode sheet substrate.

Description

Pole piece detection control system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202310984354.3, filed on August 7, 2023, entitled “Pole Detection Control System,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The embodiments of the present application relate to the field of battery technology, and in particular to a pole piece detection and control system. Background Art

[0004] With the increasing severity of environmental pollution, the new energy industry is attracting increasing attention. Battery technology is a crucial factor in the development of this industry. The development of battery technology requires consideration of multiple design factors, such as energy density, cycle life, and yield rate.

[0005] The design of the pole piece in a battery cell is crucial to the yield rate and performance of the battery cell. Therefore, how to improve the yield rate of the pole piece has become a technical problem that needs to be solved urgently in this field.

[0006] Summary of the Invention

[0007] The embodiment of the present application provides a pole piece detection and control system, which can improve the yield rate of pole pieces.

[0008] In the first aspect, a pole piece detection and control system is provided, which is applied to a pole piece coating system. The pole piece coating system includes a sequentially arranged unwinding device, a first-side coating device, a first-side drying device and a winding device. The pole piece detection and control system includes: a first detection device, which is arranged between the unwinding device and the first-side coating device, and the first detection device is used to detect the size of the area to be coated on the first side of the pole piece substrate output by the unwinding device, and the first side is perpendicular to the thickness direction of the pole piece substrate.

[0009] In an embodiment of the present application, a first detection device is provided in the electrode detection and control system, and the first detection device is used to detect the size of the area to be coated on the first side of the electrode substrate output by the unwinding device, the first side being perpendicular to the thickness direction of the electrode substrate, and the first detection device is provided between the unwinding device and the first-side coating device. The electrode detection and control system can adjust the size of the coating film corresponding to the area to be coated on the first side of the electrode substrate in the electrode substrate or the first-side coating device in a timely manner according to the detection result of the first detection device, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and thereby improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0010] In some implementations, the electrode detection and control system also includes: a first cutting device, which is arranged between the first detection device and the first-surface coating device, and the first cutting device is used to adjust the size of the coating film in the first-surface coating device corresponding to the area to be coated on the first surface of the electrode substrate according to the detection result of the first detection device.

[0011] In an embodiment of the present application, a first cutting device is provided in the electrode detection and control system, and the first cutting device is used to adjust the size of the coating film in the first-side coating device corresponding to the area to be coated on the first side of the electrode substrate according to the detection result of the first detection device, and the first cutting device is provided between the first detection device and the first-side coating device. The first cutting device can timely adjust the size of the coating film in the first-side coating device corresponding to the area to be coated on the first side of the electrode substrate according to the detection result of the first detection device, so as to reduce the risk of electrode scrapping due to untimely detection, improve the coating size consistency of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0012] In some implementations, the electrode detection control system also includes: a second detection device, which is arranged between the first-side coating device and the first-side drying device, and the second detection device is used to detect the size of the coating area on the first side of the first electrode output by the first-side coating device.

[0013] In an embodiment of the present application, a second detection device is provided in the electrode detection and control system, and the second detection device is used to detect the size of the coating area on the first side of the first electrode output by the first-side coating device, and the second detection device is arranged between the first-side coating device and the first-side drying device. The electrode detection and control system can adjust the position of the electrode substrate output by the unwinding device in a timely manner according to the detection result of the second detection device, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0014] In some implementations, the electrode detection and control system also includes: a first correction device, which is arranged between the unwinding device and the first-side coating device, and the first correction device is used to adjust the position of the electrode substrate output through the unwinding device according to the detection result of the second detection device.

[0015] In an embodiment of the present application, the first correcting device is provided in the electrode detection and control system, and the first correcting device is used to adjust the position of the electrode substrate output through the unwinding device according to the detection result of the second detection device, and the first correcting device is provided between the unwinding device and the first-side coating device. The first correcting device can timely adjust the position of the electrode substrate output through the unwinding device according to the detection result of the second detection device, so that the coating film position corresponding to the to-be-coated area on the first side of the electrode substrate output through the unwinding device in the first-side coating device matches the position of the to-be-coated area on the first side, thereby effectively reducing the risk of electrode scrapping due to untimely detection, further improving the coating size consistency of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0016] In some implementations, the electrode coating system also includes a second-side coating device and a second-side drying device sequentially arranged between the first-side drying device and the winding device, and the electrode detection and control system also includes: a third detection device, which is arranged between the first-side drying device and the second-side coating device, and the third detection device is used to detect the size of the area to be coated on the second side of the first electrode output by the first-side drying device, and the second side is perpendicular to the thickness direction of the first electrode.

[0017] In an embodiment of the present application, a third detection device is provided in the electrode detection and control system, and the third detection device is used to detect the size of the area to be coated on the second side of the first electrode output by the first side drying device, and the third detection device is provided between the first side drying device and the second side coating device. The electrode detection and control system can timely adjust the size of the area to be coated on the second side of the first electrode output by the first side drying device and the size of the coating film corresponding to the area to be coated on the second side of the first electrode output by the first side drying device in the second side coating device according to the detection result of the third detection device, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0018] In some implementations, the electrode detection and control system also includes: a second cutting device, which is arranged between the third detection device and the second-side coating device, and the second cutting device is used to adjust the size of the coating film in the second-side coating device corresponding to the area to be coated on the second side of the first electrode output by the first-side drying device according to the detection result of the third detection device.

[0019] In an embodiment of the present application, a second cutting device is provided in the electrode detection and control system, and the second cutting device is used to adjust the size of the coating film in the second-side coating device corresponding to the area to be coated on the second side of the first electrode outputted by the first-side drying device according to the detection result of the third detection device, and the second cutting device is provided between the third detection device and the second-side coating device. The second cutting device can timely adjust the size of the coating film in the second-side coating device corresponding to the area to be coated on the second side of the first electrode outputted by the first-side drying device according to the detection result of the third detection device, so as to reduce the risk of electrode scrapping due to untimely detection, improve the coating size consistency of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0020] In some implementations, the electrode coating system also includes a second-side coating device and a second-side drying device sequentially arranged between the first-side drying device and the winding device, and the electrode detection and control system also includes: a fourth detection device, which is arranged between the second-side coating device and the second-side drying device, and the fourth detection device is used to detect the size of the coating area on the second side of the first electrode output by the second-side coating device.

[0021] In an embodiment of the present application, a fourth detection device is provided in the electrode detection and control system, and the fourth detection device is used to detect the size of the coating area on the second side of the first electrode output by the second-side coating device, and the fourth detection device is arranged between the second-side coating device and the second-side drying device. The electrode detection and control system can adjust the position of the first electrode output by the first-side drying device in a timely manner according to the detection result of the fourth detection device, thereby reducing the risk of electrode scrapping due to untimely detection, improving the consistency of the coating size of the electrode, and thereby improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0022] In some implementations, the electrode detection and control system also includes: a second correction device, which is arranged between the first-side drying device and the second-side coating device, and the second correction device is used to adjust the position of the first electrode output through the first-side drying device according to the detection result of the fourth detection device.

[0023] In an embodiment of the present application, the second correcting device is provided in the electrode detection and control system, and the second correcting device is used to adjust the position of the first electrode outputted by the first-side drying device according to the detection result of the fourth detection device, and the second correcting device is provided between the first-side drying device and the second-side coating device. The second correcting device can timely adjust the position of the first electrode outputted by the first-side drying device according to the detection result of the fourth detection device, so that the coating film position corresponding to the to-be-coated area on the second side of the first electrode outputted by the first-side drying device in the second-side coating device matches the position of the to-be-coated area on the second side, thereby effectively reducing the risk of electrode scrapping due to untimely detection, further improving the coating size consistency of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0024] In some implementations, the electrode detection and control system also includes: a fifth detection device, which is arranged between the first-side drying device and the second-side coating device, and the fifth detection device is used to detect the size of the coated area on the first side of the first electrode output by the first-side drying device; the second correction device is also used to adjust the position of the first electrode output by the first-side drying device according to the detection results of the fifth detection device and the fourth detection device.

[0025] In an embodiment of the present application, the fifth detection device is provided in the electrode detection and control system, and the fifth detection device is used to detect the size of the coating area on the first side of the first electrode output by the first side drying device, and the fifth detection device is provided between the first side drying device and the second side coating device. The electrode detection and control system can adjust the position of the first electrode output by the first side drying device through the second correction device according to the detection results of the fifth detection device and the fourth detection device, so that the misalignment size of the coating area on the first side and the second side of the first electrode output by the second side coating device can be within the specification range, thereby effectively reducing the risk of electrode scrapping due to untimely detection, further improving the coating size consistency of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0026] In some implementations, the electrode detection control system also includes: a sixth detection device, which is arranged between the first-side coating device and the first-side drying device, and the sixth detection device is used to detect the weight and / or thickness of the first electrode output by the first-side coating device; the first-side coating device includes at least two calendering rollers, and the first-side coating device is used to adjust the distance and rolling pressure between any two of the at least two calendering rollers according to the detection results of the sixth detection device.

[0027] In an embodiment of the present application, a sixth detection device is provided in the electrode detection and control system, and the sixth detection device is used to detect the weight and / or thickness of the first electrode outputted by the first-side coating device, and the sixth detection device is provided between the first-side coating device and the first-side drying device. The electrode detection and control system can adjust the distance and rolling pressure between any two of the at least two calendering rollers in the first-side coating device according to the detection result of the sixth detection device, so as to improve the weight consistency of the first electrode outputted by the first-side coating device, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0028] In some implementations, the electrode detection control system also includes: a seventh detection device, which is arranged between the second-side coating device and the second-side drying device, and the seventh detection device is used to detect the weight and / or thickness of the first electrode output by the second-side coating device; the second-side coating device includes at least two calendering rollers, and the second-side coating device is used to adjust the distance and rolling pressure between any two of the at least two calendering rollers according to the detection results of the seventh detection device.

[0029] In an embodiment of the present application, a seventh detection device is provided in the electrode detection and control system, and the seventh detection device is used to detect the weight and / or thickness of the first electrode outputted by the second-side coating device, and the seventh detection device is provided between the second-side coating device and the second-side drying device. The electrode detection and control system can adjust the distance and rolling pressure between any two of the at least two calendering rollers in the second-side coating device according to the detection result of the seventh detection device, so as to improve the weight consistency of the first electrode outputted by the second-side coating device, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0030] In some embodiments, at least one supporting roller may be provided on one side or both sides of at least two calendering rollers in the first-side coating device and / or the second-side coating device, and the axis of the at least one supporting roller is on the same plane as the axis of the at least two calendering rollers and is parallel to each other.

[0031] In an embodiment of the present application, when at least two calendering rollers in the first-side coating device and / or the second-side coating device rotate, the at least one support roller can rotate along with the at least two calendering rollers to support the at least two calendering rollers, thereby reducing the deformation of the calendering rollers in the thickness direction of the electrode sheet, and improving the thickness consistency of the electrode sheet, thereby improving the yield and quality of the electrode sheet, and at the same time improving the manufacturing efficiency of the electrode sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0033] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application.

[0034] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application.

[0035] FIG3 is a schematic structural diagram of a battery cell provided in one embodiment of the present application.

[0036] FIG4 is a schematic block diagram of the process of a pole piece detection control system provided in one embodiment of the present application.

[0037] FIG5 is a schematic block diagram of the process of another pole piece detection control system provided in another embodiment of the present application.

[0038] FIG6 is a flow chart of another pole piece detection control system provided in another embodiment of the present application.

[0039] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0040] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the embodiments of the present application, but are not intended to limit the scope of the embodiments of the present application. That is, the embodiments of the present application are not limited to the described embodiments.

[0041] Unless otherwise defined, all technical and scientific terms used in the embodiments of the present application have the same meanings as those commonly understood by technicians in the technical fields of the embodiments of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application; the terms "including" and "having" in the description and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0044] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0045] It should be understood that in the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0046] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0047] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0048] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] The battery in the embodiments of this application refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing can reduce the effects of liquids or other foreign matter on the charging or discharging of the battery cells.

[0050] It should be understood that the battery cells in the embodiments of the present application include but are not limited to lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0051] In some implementations, the battery cell in the embodiments of the present application may be a metal battery. Specifically, the metal battery may include a lithium metal secondary battery, a sodium metal battery, or a magnesium metal battery.

[0052] In some implementations, a battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are inserted and removed between the positive and negative electrodes. The separator is placed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing the active ions to pass through.

[0053] In some implementations, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0054] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is provided on either or both of the two facing surfaces of the positive electrode current collector.

[0055] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0056] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. In some implementations, other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4, also referred to as LFP), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0057] As an example, the positive electrode active material may include at least one of a sodium transition metal oxide, a polyanionic compound, and a Prussian blue-based compound:

[0058] In some implementations, the chemical formula of the sodium transition metal oxide may satisfy Na x MO2, wherein M is one or more of Ti, V, Mn, Co, Ni, Fe, Zn, V, Zr, Ce, Cr and Cu, and 0<x≤1. As an example, Na xIn MO2, x can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.

[0059] In some implementations, the sodium transition metal oxide may be a sodium transition metal oxide that has been doped and modified, and the doping modification of the sodium transition metal oxide may include at least one of sodium site doping modification, oxygen site doping modification, transition metal site doping modification, and surface coating modification.

[0060] In some implementations, a metal foam may be used as the positive electrode. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, among others. When the metal foam is used as the positive electrode, the surface of the metal foam may or may not be provided with a positive electrode active material. For example, a lithium source material, potassium metal, or sodium metal may be filled and / or deposited within the metal foam, where the lithium source material is lithium metal and / or a lithium-rich material.

[0061] In some implementations, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0062] As an example, the negative electrode current collector may be a metal foil, a metal foam, or a composite current collector. For example, as the metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. may be used. The composite current collector may include a polymer material base layer and a metal layer. The metal foam may be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0063] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0064] A negative electrode-free sodium secondary battery refers to a battery cell that does not actively set a negative electrode active material layer on the negative electrode side during the manufacturing process of the battery cell. For example, during the manufacturing process of the battery cell, a sodium metal or carbonaceous active material layer is not set at the negative electrode through processes such as coating or deposition to form a negative electrode active material layer. During the first charge, sodium ions gain electrons on the anode side and deposit on the surface of the current collector to form a sodium metal phase. During discharge, metallic sodium can be converted into sodium ions and return to the positive electrode, realizing cyclic charge and discharge. Compared with other sodium secondary batteries, negative electrode-free sodium secondary battery cells can achieve higher energy density due to the lack of a negative electrode active material layer.

[0065] In some implementations, in order to improve the performance of battery cells, some functional coatings, such as carbonaceous materials, metal oxides, alloys, etc., can be provided on the negative electrode side of the negative electrode-free sodium secondary battery to improve the conductivity of the negative electrode current collector and improve the uniformity of the deposited sodium metal.

[0066] In some implementations, the CB value of the negative electrode-free sodium secondary battery is less than or equal to 0.1.

[0067] Specifically, the CB value is the capacity per unit area of ​​the negative electrode in a secondary battery divided by the capacity per unit area of ​​the positive electrode. Since a battery without a negative electrode contains no or only a small amount of functional coating, the capacity per unit area of ​​the negative electrode is relatively small, and the CB value of the secondary battery is less than or equal to 0.1.

[0068] In some implementations, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0069] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0070] In some implementations, the separator is a separator. The present invention has no particular restrictions on the type of separator, and any known separator with a porous structure having good chemical and mechanical stability can be used.

[0071] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0072] In some implementations, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to both transport ions and isolate the positive and negative electrodes.

[0073] In some implementations, the battery cell also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application does not specifically limit the type of electrolyte, and the electrolyte can be selected based on needs. The electrolyte can be liquid, gel, or solid.

[0074] In some implementations, the electrode assembly may be a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0075] In some implementations, the electrode assembly is a laminated structure. As an example, multiple positive and negative electrodes may be provided, and the multiple positive and negative electrodes may be alternately stacked.

[0076] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0077] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of stacked folded segments.

[0078] As an example, a plurality of separators may be provided, each of which is disposed between any adjacent positive electrode sheets or negative electrode sheets.

[0079] As an example, the separator may be provided continuously, and may be provided between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0080] In some implementations, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0081] In some implementations, the electrode assembly is provided with tabs that can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0082] In some implementations, a battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (e.g., polypropylene), a composite metal housing (e.g., a copper-aluminum composite housing), or an aluminum-plastic film.

[0083] As an example, the battery cells may be cylindrical, prismatic, soft-pack or other shaped battery cells. Prismatic battery cells include square-shell, blade-shaped, and polygonal batteries. Polygonal batteries may be, for example, hexagonal batteries.

[0084] In order to meet different power requirements, the battery in the embodiment of the present application may include multiple battery cells, wherein the multiple battery cells can be connected in series, in parallel, or in hybrid connection, and hybrid connection refers to a mixture of series and parallel connection. Optionally, multiple battery cells can first be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery module, and the battery module can then form a battery. The battery is further arranged in an electrical device to provide electrical energy to the electrical device.

[0085] Currently, with the increasing severity of environmental pollution, the new energy industry is attracting more and more attention. In the new energy industry, battery technology is an important factor affecting its development. The development of battery technology requires consideration of many design factors, such as energy density, cycle life, and yield rate. The battery production process is relatively complex and includes multiple steps, such as stirring, coating, rolling, die-cutting, winding, liquid injection, and formation. Among them, the coating process is an important link that cannot be ignored. Its impact on battery performance is crucial. The stability, uniformity, and size of its coating will affect the final performance of the battery. Among them, the dimensions of the coated AB surface. Including position dimensions, width dimensions, AB surface misalignment dimensions, etc., all have a great impact on battery performance. The pole piece design in the battery cell is crucial to the yield rate and performance of the battery cell.

[0086] When the battery industry is in the preliminary research stage of continuous production of electrodes, the premixed powder cannot be uniformly formed into a film, and the film cannot be continuously reeled after forming. The powder is rolled and thinned to form a self-supporting membrane. The weight fluctuates greatly and the consistency is poor, which reduces the overall efficiency of the equipment and the possibility of mass production is small. In addition, it is difficult to press the premixed fiberized material into a uniform thickness after unloading, and the thickness consistency in the width direction is also poor. The wide-width roller-formed film has uneven transverse thickness, which makes the yield rate of the electrode low. At the same time, due to the lack of effective detection equipment, it is difficult to detect the size of the coating area on the first and second sides of the finished electrode, resulting in poor dimensional consistency of the electrode, and the debugging time after quality problems occur is too long. Therefore, how to improve the yield rate of the electrode has become a technical problem that needs to be solved urgently in this field.

[0087] In view of this, an embodiment of the present application provides a pole piece detection and control system, which is applied to a pole piece coating system, wherein the pole piece coating system includes a sequentially arranged unwinding device, a first-side coating device, a first-side drying device, and a winding device, and the pole piece detection and control system includes: a first detection device, which is arranged between the unwinding device and the first-side coating device, and the first detection device is used to detect the size of the area to be coated on the first side of the pole piece substrate output by the unwinding device, and the first side is perpendicular to the thickness direction of the pole piece substrate. In this way, in an embodiment of the present application, the pole piece detection and control system can timely adjust the size of the coating film corresponding to the area to be coated on the first side of the pole piece substrate or the first-side coating device according to the detection result of the first detection device, thereby reducing the risk of pole piece scrapping due to untimely detection, improving the coating size consistency of the pole piece, and thus improving the yield and quality of the pole piece, while improving the manufacturing efficiency of the pole piece.

[0088] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be fuel-powered vehicles, gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting tools, grinding tools, assembly tools, and railway tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0089] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0090] For example, as shown in FIG1 , it is a structural schematic diagram of a vehicle 1 provided in an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 may be provided inside the vehicle 1. The controller 30 is used to control the battery 10 to supply power to the motor 40. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the startup, navigation and operation of the vehicle 1. In another implementation of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0091] In order to meet different power usage requirements, the battery 10 in the embodiment of the present application can be a battery cell group or a battery pack. The battery 10 may include at least one battery cell group, and the battery cell group includes a plurality of battery cells, wherein the plurality of battery cells can be electrically connected in series, in parallel, or in mixed connection to form a battery 10, wherein mixed connection refers to a mixture of series and parallel connection. The battery 10 can also be referred to as a battery pack. For example, a plurality of battery cells can first be connected in series, in parallel, or in mixed connection to form a battery module, and a plurality of battery modules can then be connected in series, in parallel, or in mixed connection to form a battery 10. In other words, a plurality of battery cells can directly form a battery 10, or they can first be formed into a battery module, and then the battery modules can be formed into a battery 10.

[0092] In some implementations, the battery 10 may include multiple battery cells. For example, FIG2 is a schematic diagram of the structure of a battery 10 according to one embodiment of the present application. The battery 10 may include multiple battery cells 20. The battery 10 may also include a housing 11 having a hollow interior and housing the multiple battery cells 20. For example, the multiple battery cells 20 may be connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0093] In some implementations, the battery 10 may further include other structures, which will not be described in detail here. For example, the battery 10 may further include a busbar component, which is used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can achieve electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0094] In the embodiment of the present application, the number of battery cells 20 can be set to any value according to different power requirements. Multiple battery cells 20 can be connected in series, parallel or hybrid to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, for ease of installation, the battery cells 20 can be grouped, and each group of battery cells 20 constitutes a battery module. The number of battery cells 20 included in the battery module is not limited and can be set according to demand. The battery 10 may include multiple battery modules, which can be connected in series, parallel or hybrid.

[0095] As shown in FIG3 , it is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell or battery box 21. The walls of the shell 211 and the cover plate 212 are both referred to as the walls of the battery cell 20. For a rectangular battery cell 20, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the one or more electrode assemblies 22 after combination. For example, the shell 211 can be a hollow cuboid, cube or cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall, so that the inside and outside of the shell 211 are connected. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for accommodating the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0096] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member, also known as a current collecting member, located between the cover plate 212 and the electrode assembly 22 to electrically connect the electrode assembly 22 to the electrode terminals 214.

[0097] As shown in FIG3 , each electrode assembly 22 has a first electrode tab 221 a and a second electrode tab 222 a. The polarities of the first electrode tab 221 a and the second electrode tab 222 a are opposite. For example, when the first electrode tab 221 a is a positive electrode tab, the second electrode tab 222 a is a negative electrode tab.

[0098] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG3 , two independent electrode assemblies 22 are provided in the battery cell 20 .

[0099] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0100] The pressure relief mechanism 213 may have various possible pressure relief structures. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0101] FIG4 shows a schematic block diagram of the process of a pole piece detection control system 100 provided in one embodiment of the present application.

[0102] In some implementations, as shown in Figure 4, the electrode detection and control system 100 can be applied to an electrode coating system, which includes a sequentially arranged unwinding device 101, a first-side coating device 102, a first-side drying device 103 and a winding device 104. The electrode detection and control system 100 includes a first detection device 105, which is arranged between the unwinding device 101 and the first-side coating device 102. The first detection device 105 is used to detect the size of the area to be coated on the first side of the electrode substrate output by the unwinding device 101, and the first side is perpendicular to the thickness direction of the electrode substrate.

[0103] It should be understood that the electrode substrate in the embodiment of the present application may include aluminum foil, and the electrode obtained based on the electrode substrate is a positive electrode. Alternatively, the electrode substrate may include copper foil, and the electrode obtained based on the electrode substrate is a negative electrode.

[0104] It should also be understood that the area to be coated on the first surface of the electrode substrate is the area to be coated with the slurry. The first surface can be one of the surfaces of the electrode substrate to which the slurry is coated, and can be the front surface of the electrode substrate or the back surface of the electrode substrate. Secondly, the second surface of the electrode substrate can be a surface on the electrode substrate corresponding to the first surface. For example, if the first surface is the front surface of the electrode substrate, the second surface is the back surface of the electrode substrate; if the first surface is the back surface of the electrode substrate, the second surface is the front surface of the electrode substrate.

[0105] It should also be understood that the size of the area to be coated on the first surface of the electrode substrate in the embodiments of the present application can be the size of the area to be coated along the width direction of the electrode substrate. The slurry in the embodiments of the present application can also be referred to as an active material. If the electrode substrate comprises aluminum foil, the slurry can include lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. If the electrode substrate comprises copper foil, the slurry can include carbon or silicon.

[0106] It should also be understood that in some implementations, the first detection device 105 can also be used to detect the size of the tab formation area on the first surface of the electrode substrate output by the unwinding device 101. The tab formation area is used to form the tab portion of the electrode, and then determine the size of the area to be coated. The first detection device 105 can be any type of imaging device capable of achieving the above functions. For example, the first detection device 105 can be a charge coupled device (CCD) vision system.

[0107] In an embodiment of the present application, a first detection device 105 is provided in the electrode detection and control system 100. The first detection device 105 is used to detect the size of the area to be coated on the first surface of the electrode substrate output by the unwinding device 101. The first surface is perpendicular to the thickness direction of the electrode substrate, and the first detection device 105 is arranged between the unwinding device 101 and the first-side coating device 102. The electrode detection and control system 100 can adjust the size of the coating film corresponding to the area to be coated on the first surface of the electrode substrate in the electrode substrate or the first-side coating device 102 in a timely manner according to the detection result of the first detection device 105, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and thereby improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0108] In some implementations, as shown in Figure 4, the electrode detection and control system 100 also includes a first cutting device 106, which is arranged between the first detection device 105 and the first-side coating device 102. The first cutting device 106 is used to adjust the size of the coating film corresponding to the area to be coated on the first side of the electrode substrate in the first-side coating device 102 according to the detection result of the first detection device 105.

[0109] Specifically, in the embodiment of the present application, after the first detection device 105 and the first cutting device 106 are set in the electrode detection control system 100, the electrode detection control system 100 can detect the size of the area to be coated on the first side of the electrode substrate output by the unwinding device 101 through the first detection device 105, and compare it with the size of the coated film output by the first side coating device 102, and use the linear regression equation to analyze whether the size of the area to be coated is within the process specification range. If the closed-loop adjustment amount is 0, wait for the next closed-loop data acquisition control cycle. Then, the first detection device 105 is used to detect the size of the area to be coated on the first side of the electrode substrate output by the unwinding device 101 again; if the closed-loop adjustment amount is not 0, the first cutting device 106 is called to timely adjust the size of the coating film corresponding to the area to be coated on the first side of the electrode substrate in the first-side coating device 102. After the adjustment is completed, wait for the next closed-loop data acquisition control cycle and then detect the size of the area to be coated on the first side of the electrode substrate output by the unwinding device 101 again through the first detection device 105 to realize closed-loop control.

[0110] Thus, in an embodiment of the present application, a first cutting device 106 is provided in the electrode detection and control system 100, and the first cutting device 106 is used to adjust the size of the coating film corresponding to the area to be coated on the first side of the electrode substrate in the first-side coating device 102 according to the detection result of the first detection device 105, and the first cutting device 106 is provided between the first detection device 105 and the first-side coating device 102. The first cutting device 106 can timely adjust the size of the coating film corresponding to the area to be coated on the first side of the electrode substrate in the first-side coating device 102 according to the detection result of the first detection device 105, so as to reduce the risk of electrode scrapping due to untimely detection, improve the coating size consistency of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0111] In some implementations, as shown in Figure 4, the electrode detection control system also includes a second detection device 107, which is arranged between the first-side coating device 102 and the first-side drying device 103. The second detection device 107 is used to detect the size of the coating area on the first side of the first electrode output by the first-side coating device 102.

[0112] It should be understood that the coated area on the first side of the first electrode plate output by the first-side coating device 102 in the embodiment of the present application refers to the area formed after the first side of the electrode substrate is coated by the first-side coating device 102. The size of the coated area on the first side of the first electrode plate output by the first-side coating device 102 in the embodiment of the present application can be the size along the width direction of the first electrode plate. The second detection device 107 can be any type of imaging device capable of achieving the above functions. For example, the second detection device 107 can be a CCD vision system.

[0113] In an embodiment of the present application, a second detection device 107 is provided in the electrode detection and control system 100, and the second detection device 107 is used to detect the size of the coating area on the first surface of the first electrode output by the first-surface coating device 102, and the second detection device 107 is arranged between the first-surface coating device 102 and the first-surface drying device 103. The electrode detection and control system 100 can adjust the position of the electrode substrate output by the unwinding device 101 in a timely manner according to the detection result of the second detection device 107, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and thereby improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0114] In some implementations, as shown in Figure 4, the electrode detection and control system 100 also includes a first correction device 108, which is arranged between the unwinding device 101 and the first-side coating device 102. The first correction device 108 is used to adjust the position of the electrode substrate output by the unwinding device 101 according to the detection result of the second detection device 107.

[0115] In an embodiment of the present application, the first correcting device 108 is set in the electrode detection and control system 100, and the first correcting device 108 is used to adjust the position of the electrode substrate output by the unwinding device 101 according to the detection result of the second detection device 107, and the first correcting device 108 is set between the unwinding device 101 and the first-side coating device 102. The first correcting device 108 can timely adjust the position of the electrode substrate output by the unwinding device 101 according to the detection result of the second detection device 107, so that the coating film position corresponding to the area to be coated on the first side of the electrode substrate output by the unwinding device 101 in the first-side coating device 102 matches the position of the area to be coated on the first side, thereby effectively reducing the risk of electrode scrapping due to untimely detection, further improving the coating size consistency of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0116] FIG5 shows a schematic block diagram of the process of a pole piece detection control system 300 provided in another embodiment of the present application.

[0117] It should be understood that in the embodiments of the present application, in order to reduce redundancy, the unwinding device 101, the first correction device 108, the first detection device 105, the first cutting device 106, the first surface coating device 102, the second detection device 107 and the first surface drying device 103 shown in the electrode detection control system 100 in Figure 4 can be replaced by the first device 200.

[0118] In some implementations, as shown in Figure 5, the electrode coating system also includes a second-side coating device 109 and a second-side drying device 110 sequentially arranged between the first-side drying device 103 and the winding device 104, and the electrode detection and control system 300 may include a third detection device 111, which is arranged between the first-side drying device 103 and the second-side coating device 109, and the third detection device 111 is used to detect the size of the area to be coated on the second side of the first electrode output by the first-side drying device 103, and the second side is perpendicular to the thickness direction of the first electrode.

[0119] It should be understood that the area to be coated on the second surface of the first electrode is the area to be coated with the slurry. The second surface can be one of the surfaces of the electrode substrate to which the slurry is coated, and can be the front side of the electrode substrate or the back side of the electrode substrate. Secondly, the second surface of the electrode substrate can be a surface on the electrode substrate corresponding to the first surface. For example, if the first surface is the front side of the electrode substrate, the second surface is the back side of the electrode substrate; if the first surface is the back side of the electrode substrate, the second surface is the front side of the electrode substrate.

[0120] It should also be understood that the size of the area to be coated on the second surface of the first electrode piece output by the first surface drying device 103 in the embodiment of the present application may be the size of the area to be coated along the width direction of the first electrode piece.

[0121] It should also be understood that in some implementations, the third detection device 111 can also be used to detect the size of the tab formation area on the second side of the first electrode sheet output from the first side drying device 103, and then determine the size of the area to be coated. The third detection device 111 can be any type of imaging device capable of achieving the above functions. For example, the third detection device 111 can be a CCD vision system.

[0122] In an embodiment of the present application, a third detection device 111 is provided in the electrode detection and control system 300, and the third detection device 111 is used to detect the size of the area to be coated on the second side of the first electrode outputted by the first side drying device 103, and the third detection device 111 is provided between the first side drying device 103 and the second side coating device 109. The electrode detection and control system 300 can timely adjust the size of the area to be coated on the second side of the first electrode outputted by the first side drying device 103 and the size of the coating film corresponding to the area to be coated on the second side of the first electrode outputted by the first side drying device 103 in the second side coating device 109 according to the detection result of the third detection device 111, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and thereby improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0123] In some implementations, as shown in Figure 5, the electrode detection and control system 300 also includes a second cutting device 112, which is arranged between the third detection device 111 and the second-side coating device 109. The second cutting device 112 is used to adjust the size of the coating film in the second-side coating device 109 corresponding to the area to be coated on the second side of the first electrode output by the first-side drying device 103 according to the detection result of the third detection device 111.

[0124] Specifically, in the embodiment of the present application, after the third detection device 111 and the second cutting device 112 are set in the electrode detection control system 300, the electrode detection control system 300 can detect the size of the area to be coated on the second side of the first electrode output by the first side drying device 103 through the third detection device 111, and compare it with the size of the coated film output by the second side coating device 109, and use the linear regression equation to analyze whether the size of the area to be coated is within the process specification range. If the closed-loop adjustment amount is 0, wait for the next closed-loop data acquisition control cycle before resetting. The size of the area to be coated on the second side of the first electrode piece output by the first-side drying device 103 is detected by the third detection device 111 for the first time; if the closed-loop adjustment amount is not 0, the second cutting device 112 is called to timely adjust the size of the coating film corresponding to the area to be coated on the second side of the first electrode piece in the second-side coating device 109. After the adjustment is completed, wait for the next closed-loop data acquisition control cycle and then use the third detection device 111 again to detect the size of the area to be coated on the second side of the first electrode piece output by the first-side drying device 103 to achieve closed-loop control.

[0125] In an embodiment of the present application, a second cutting device 112 is provided in the electrode detection and control system 300. The second cutting device 112 is used to adjust the size of the coating film corresponding to the area to be coated on the second surface of the first electrode outputted by the first surface drying device 103 in the second-side coating device 109 according to the detection result of the third detection device 111, and the second cutting device 112 is arranged between the third detection device 111 and the second-side coating device 109. The second cutting device 112 can timely adjust the size of the coating film corresponding to the area to be coated on the second surface of the first electrode outputted by the first surface drying device 103 in the second-side coating device 109 according to the detection result of the third detection device 111, so as to reduce the risk of electrode scrapping due to untimely detection, improve the coating size consistency of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0126] In some implementations, as shown in Figure 5, the electrode coating system also includes a second-side coating device 109 and a second-side drying device 110 sequentially arranged between the first-side drying device 103 and the winding device 104, and the electrode detection and control system 300 also includes: a fourth detection device 113, which is arranged between the second-side coating device 109 and the second-side drying device 110, and the fourth detection device 113 is used to detect the size of the coating area on the second side of the first electrode output by the second-side coating device 109.

[0127] It should be understood that the coating area on the second side of the first electrode piece output by the second-side coating device 109 in the embodiment of the present application refers to the area formed after the second side of the first electrode piece is coated by the second-side coating device 109. The size of the coating area on the second side of the first electrode piece output by the second-side coating device 109 in the embodiment of the present application can be the size along the width direction of the first electrode piece. The fourth detection device 113 can be any type of imaging device capable of achieving the above functions. For example, the fourth detection device 113 can be a CCD vision system.

[0128] In an embodiment of the present application, a fourth detection device 113 is provided in the electrode detection control 300 system, and the fourth detection device 113 is used to detect the size of the coating area on the second side of the first electrode output by the second-side coating device 109, and the fourth detection device 113 is provided between the second-side coating device 109 and the second-side drying device 110. The electrode detection control system 300 can adjust the position of the first electrode output by the first-side drying device 103 in a timely manner according to the detection result of the fourth detection device 113, thereby reducing the risk of electrode scrapping due to untimely detection, improving the coating size consistency of the electrode, and thereby improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0129] In some implementations, as shown in Figure 5, the electrode detection and control system 300 also includes a second correction device 114, which is arranged between the first surface drying device 103 and the second surface coating device 109. The second correction device 114 is used to adjust the position of the first electrode output by the first surface drying device 103 according to the detection result of the fourth detection device 113.

[0130] In an embodiment of the present application, a second correcting device 114 is provided in the electrode detection and control system 300. The second correcting device 114 is used to adjust the position of the first electrode outputted by the first-side drying device 103 according to the detection result of the fourth detection device 113, and the second correcting device 114 is provided between the first-side drying device 103 and the second-side coating device 109. The second correcting device 114 can timely adjust the position of the first electrode outputted by the first-side drying device 103 according to the detection result of the fourth detection device 113, so that the coating film position corresponding to the area to be coated on the second side of the first electrode outputted by the first-side drying device 103 in the second-side coating device 109 matches the position of the area to be coated on the second side, thereby effectively reducing the risk of electrode scrapping due to untimely detection, further improving the coating size consistency of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0131] In some implementations, as shown in Figure 5, the electrode detection and control system 300 also includes a fifth detection device 115, which is arranged between the first-side drying device 103 and the second-side coating device 109. The fifth detection device 115 is used to detect the size of the coated area on the first side of the first electrode output by the first-side drying device 103; the second correction device 114 is also used to adjust the position of the first electrode output by the first-side drying device 103 according to the detection results of the fifth detection device 115 and the fourth detection device 113.

[0132] Specifically, in the embodiment of the present application, after the fourth detection device 113, the second correction device 114 and the fifth detection device 115 are set in the electrode detection and control system 300, the fourth detection device 113 detects the size of the coating area on the second side of the first electrode output by the second-side coating device 109, and the fifth detection device 115 detects the size of the coating area on the first side of the first electrode output by the first-side drying device 103, and determines a plurality of dislocation values ​​based on the detection results of the fourth detection device 113 and the fifth detection device 115. The dislocation value can be the difference between the distance between the edge of the coating area on the first side of the first electrode and the reference edge and the distance between the edge of the coating area on the second side of the first electrode and the reference edge. Subsequently, the closed-loop adjustment amount is determined based on the dislocation value and the preset correction amount. If the closed-loop adjustment amount is 0, wait for the next closed-loop data acquisition control cycle and then pass through the fourth detection device again. The device 113 detects the size of the coating area on the second side of the first electrode output by the second-side coating device 109, and the fifth detection device 115 detects the size of the coating area on the first side of the first electrode output by the first-side drying device 103; if the closed-loop adjustment amount is not 0, the second correction device 114 is called to adjust the position of the first electrode output by the first-side drying device 103, so that the misalignment value between the first side and the coating area on the second side of the first electrode output by the second-side coating device 109 is within the specification range. After the adjustment is completed, wait for the next closed-loop data acquisition control cycle and again detect the size of the coating area on the second side of the first electrode output by the second-side coating device 109 by the fourth detection device 113, and detect the size of the coating area on the first side of the first electrode output by the first-side drying device 103 by the fifth detection device 115 to achieve closed-loop control.

[0133] In an embodiment of the present application, the fifth detection device 115 is provided in the electrode detection and control system 300, and the fifth detection device 115 is used to detect the size of the coating area on the first surface of the first electrode output by the first surface drying device 103, and the fifth detection device 115 is provided between the first surface drying device 103 and the second surface coating device 109. The electrode detection and control system 300 can adjust the position of the first electrode output by the first surface drying device 103 through the second correction device 114 according to the detection results of the fifth detection device 115 and the fourth detection device 113, so that the misalignment value between the first surface and the coating area on the second surface of the first electrode output by the second surface coating device 109 can be within the specification range, thereby effectively reducing the risk of electrode scrapping due to untimely detection, further improving the coating size consistency of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0134] In some implementations, as shown in Figure 4, the electrode detection and control system 100 also includes a sixth detection device 116, which is arranged between the first-side coating device 102 and the first-side drying device 103, and the sixth detection device 116 is used to detect the weight and / or thickness of the first electrode output by the first-side coating device 102; the first-side coating device 102 includes at least two calendering rollers, and the first-side coating device 102 is used to adjust the distance and rolling pressure between any two of the at least two calendering rollers according to the detection results of the sixth detection device 116.

[0135] It should be understood that the sixth detection device 116 in the embodiment of the present application can be an automated measurement system that uses automated equipment and systems to continuously or at high speed measure the weight and / or thickness of the first electrode sheet output by the first-side coating device 102 via a sensor or weighing device to improve detection efficiency and accuracy. Exemplarily, the sixth detection device 116 includes but is not limited to a laser side thickness detection device, a beta-ray or X-ray side weight detection device.

[0136] It should also be understood that in the embodiment of the present application, when the electrode detection and control system 100 adjusts the distance and rolling pressure between any two of the at least two calendering rollers in the first-side coating device 102 according to the sixth detection device 116, it will affect the size of the coating area on the first side of the first electrode output by the first-side coating device 102 to a certain extent. Subsequently, the electrode detection and control system 100 can further control the first cutting device 106 and the first correction device 108 through the first detection device 105 and the second detection device 107 provided in the electrode detection and control system 100, so as to take into account the weight consistency and size consistency of the first electrode output by the first-side coating device 102, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0137] In an embodiment of the present application, a sixth detection device 116 is provided in the electrode detection and control system 100, and the sixth detection device 116 is used to detect the weight and / or thickness of the first electrode outputted by the first-side coating device 102, and the sixth detection device 116 is provided between the first-side coating device 102 and the first-side drying device 103. The electrode detection and control system 100 can adjust the distance and rolling pressure between any two of the at least two calendering rollers in the first-side coating device 102 according to the detection result of the sixth detection device 116, so as to improve the weight consistency of the first electrode outputted by the first-side coating device 102, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0138] In some implementations, as shown in Figure 5, the electrode detection and control system 300 also includes: a seventh detection device 117, the seventh detection device 117 is arranged between the second-side coating device 109 and the second-side drying device 110, the seventh detection device 117 is used to detect the weight and / or thickness of the first electrode output by the second-side coating device 109; the second-side coating device includes at least two calendering rollers, and the second-side coating device 109 is used to adjust the distance and rolling pressure between any two of the at least two calendering rollers according to the detection results of the seventh detection device 117.

[0139] It should be understood that the seventh detection device 117 in the embodiment of the present application can be an automated measurement system that uses automated equipment and systems to continuously or high-speed measure the weight and / or thickness of the first electrode sheet output by the second-side coating device 109 via a sensor or weighing device to improve detection efficiency and accuracy. Exemplarily, the seventh detection device 117 includes but is not limited to a laser side thickness device, a beta-ray or X-ray side weight detection device.

[0140] It should also be understood that in the embodiment of the present application, when the electrode detection and control system 300 adjusts the distance and rolling pressure between any two of the at least two calendering rollers in the second-side coating device 109 according to the seventh detection device 117, it will affect the size of the coating area on the second side of the first electrode output by the second-side coating device 109 to a certain extent. Subsequently, the electrode detection and control system 300 can further control the second cutting device 112 and the second correction device 114 through the third detection device 111 and the fourth detection device 113 provided in the electrode detection and control system 300, so as to take into account the weight consistency and size consistency of the first electrode output by the second-side coating device 109, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0141] In an embodiment of the present application, a seventh detection device 117 is provided in the electrode detection and control system 300, and the seventh detection device 117 is used to detect the weight and / or thickness of the first electrode outputted by the second-side coating device 109, and the seventh detection device 117 is provided between the second-side coating device 109 and the second-side drying device 110. The electrode detection and control system 300 can adjust the distance and rolling pressure between any two of the at least two calendering rollers in the second-side coating device 109 according to the detection result of the seventh detection device 117, so as to improve the weight consistency of the first electrode outputted by the second-side coating device 109, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0142] In some implementations, at least one support roller may be provided on one or both sides of at least two calendering rollers in the first-side coating device 102 or the second-side coating device 109 in the embodiment of the present application, and the axis of the at least one support roller is in the same plane as the axis of the at least two calendering rollers and is parallel to each other. For example, a support roller may be provided on each of the left and right sides of three consecutively arranged calendering rollers in the second-side coating device 109, that is, the three consecutively horizontally arranged calendering rollers are provided between the two support rollers, and the axis of the support rollers on the left and right sides is in the same plane as the axis of the three calendering rollers and is parallel to each other.

[0143] In an embodiment of the present application, when at least two calendering rollers in the first-side coating device 102 or the second-side coating device 109 rotate, the at least one support roller can rotate along with the at least two calendering rollers to support the at least two calendering rollers, thereby reducing the deformation of the calendering rollers in the thickness direction of the electrode sheet, and improving the thickness consistency of the electrode sheet, thereby improving the yield and quality of the electrode sheet, and at the same time improving the manufacturing efficiency of the electrode sheet.

[0144] In some implementations, as shown in FIG6 , the second-side coating device 109 may include a thinning roller 1091, a transfer roller 1092, and a composite roller 1093 arranged in sequence. Since there is a reaction force on the calendering roller when the film to be coated is thinned, the roller deflection and deformation are caused, thereby affecting the thinning effect of the film and reducing the yield rate of the electrode. In some implementations, as shown in FIG6 , the diameter of the thinning roller 1091 can be reduced to reduce the pressure of the roller, thereby improving the deflection and deformation of the thinning roller 1091, reducing the impact on the uniformity of the film, and improving the yield rate and quality of the electrode. In other implementations, at least one support roller can be provided on the side of the thinning roller 1091 away from the transfer roller 1092 and the composite roller 1093 to support the thinning roller 1091, so as to effectively reduce the deformation of the thinning roller 1091 during movement, thereby improving the thickness consistency of the electrode, thereby improving the yield rate and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0145] FIG6 shows a flow chart of a pole piece detection and control system 400 provided in another embodiment of the present application. In some implementations, as shown in FIG6 , the pole piece detection and control system 400 includes an unwinding device 101, a first deflection correction device 108, a first detection device 105, a first cutting device 106, a first-side coating device 102, a second detection device 107, a sixth detection device 116, a first-side drying device 103, a second deflection correction device 114, a fifth detection device 115, a third detection device 111, a second cutting device 112, a second-side coating device 109, a fourth detection device 113, a seventh detection device 117, a second-side drying device 110, and a winding device 104, which are arranged in sequence.

[0146] Although the present application has been described with reference to the above-described embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A pole piece detection control system, characterized in that: Applied to the pole piece coating system, the pole piece coating system includes a sequentially arranged unwinding device, a first surface coating device, a first surface drying device and a winding device, and the pole piece detection control system includes: A first detection device is arranged between the unwinding device and the first-surface coating device, and is used to detect the size of the area to be coated on the first surface of the electrode substrate output by the unwinding device, and the first surface is perpendicular to the thickness direction of the electrode substrate.

2. The pole piece detection control system according to claim 1, characterized in that: The pole piece detection control system also includes: A first cutting device, wherein the first cutting device is arranged between the first detection device and the first surface coating device, and the first cutting device is used to adjust the size of the coating film in the first surface coating device corresponding to the area to be coated on the first surface of the electrode substrate output by the unwinding device according to the detection result of the first detection device.

3. The pole piece detection control system according to claim 1 or 2, characterized in that: The pole piece detection control system also includes: The second detection device is arranged between the first-surface coating device and the first-surface drying device, and is used to detect the size of the coating area on the first surface of the first electrode piece output by the first-surface coating device.

4. The pole piece detection control system according to claim 3, characterized in that: The pole piece detection control system also includes: A first deflection correcting device is provided between the unwinding device and the first surface coating device, and is used for adjusting the position of the electrode substrate outputted by the unwinding device according to the detection result of the second detection device.

5. The pole piece detection control system according to any one of claims 1 to 4, characterized in that: The electrode coating system further includes a second surface coating device and a second surface drying device sequentially arranged between the first surface drying device and the winding device, and the electrode detection control system further includes: A third detection device is arranged between the first-surface drying device and the second-surface coating device, and is used to detect the size of the area to be coated on the second surface of the first electrode piece output by the first-surface drying device, and the second surface is perpendicular to the thickness direction of the first electrode piece.

6. The pole piece detection control system according to claim 5, characterized in that: The pole piece detection control system also includes: A second cutting device, wherein the second cutting device is arranged between the third detection device and the second-side coating device, and the second cutting device is used to adjust the size of the coating film in the second-side coating device corresponding to the area to be coated on the second side of the first electrode piece output by the first-side drying device according to the detection result of the third detection device.

7. The pole piece detection control system according to any one of claims 1 to 6, characterized in that: The electrode coating system further includes a second surface coating device and a second surface drying device sequentially arranged between the first surface drying device and the winding device, and the electrode detection control system further includes: A fourth detection device is provided between the second-side coating device and the second-side drying device, and is used to detect the size of the coating area on the second side of the first electrode plate output by the second-side coating device.

8. The pole piece detection control system according to claim 7, characterized in that: The pole piece detection control system also includes: The second deflection correcting device is arranged between the first-side drying device and the second-side coating device, and is used for adjusting the position of the first electrode piece outputted by the first-side drying device according to the detection result of the fourth detection device.

9. The pole piece detection control system according to claim 8, characterized in that: The pole piece detection control system also includes: a fifth detection device, the fifth detection device being arranged between the first surface drying device and the second surface coating device, the fifth detection device being used to detect the size of the coating area on the first surface of the first electrode piece output by the first surface drying device; The second deviation correcting device is further used to adjust the position of the first pole piece output by the first surface drying device according to the detection results of the fifth detection device and the fourth detection device.

10. The pole piece detection control system according to any one of claims 1 to 9, characterized in that: The pole piece detection control system also includes: A sixth detection device, the sixth detection device is arranged between the first-side coating device and the first-side drying device, and the sixth detection device is used to detect the weight and / or thickness of the first electrode sheet output by the first-side coating device; The first-side coating device comprises at least two calendering rollers, and the first-side coating device is used to adjust the distance and rolling pressure between any two calendering rollers of the at least two calendering rollers according to the detection result of the sixth detection device.

11. The pole piece detection control system according to any one of claims 5 to 10, characterized in that: The pole piece detection control system also includes: a seventh detection device, the seventh detection device being arranged between the second-side coating device and the second-side drying device, the seventh detection device being used to detect the weight and / or thickness of the first electrode sheet outputted by the second-side coating device; The second-side coating device comprises at least two calendering rollers, and the second-side coating device is used to adjust the distance and rolling pressure between any two calendering rollers of the at least two calendering rollers according to the detection result of the seventh detection device.

12. The pole piece detection control system according to any one of claims 5 to 11, characterized in that: At least one supporting roller may be provided on one side or both sides of at least two calendering rollers in the first-side coating device and / or the second-side coating device, and the axis of the at least one supporting roller is in the same plane as the axis of the at least two calendering rollers and is parallel to each other.

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