Pole piece detection control system

Abstract

The embodiment of the invention provides a battery pole piece detection control system which can improve the yield of pole pieces. The pole piece detection control system is applied to the pole piece coating system, the pole piece coating system comprises an unwinding device, a first surface coating device, a first surface drying device and a winding device which are arranged in sequence, and the pole piece detection control system comprises a first detection device, a second detection device, a second detection device and a control device, the first detection device is used for detecting the size of a to-be-coated area on the first face of the pole piece base material output by the unwinding device, and the first face is perpendicular to the thickness direction of the pole piece base material.

Description

Technical Field

[0001] 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

[0002] As environmental pollution becomes increasingly serious, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development. The development of battery technology needs to consider many design factors, such as energy density, cycle life, and yield rate.

[0003] The pole piece design 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 to be solved urgently in this field. Summary of the invention

[0004] The embodiment of the present application provides a pole piece detection and control system, which can improve the yield rate of pole pieces.

[0005] In the first aspect, a pole piece detection and control system is provided, characterized in that it 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, the first detection device is arranged between the unwinding device and the first-side coating device, the first detection device is used to detect the size of the to-be-coated area on the first side of the pole piece substrate output by the unwinding device, the first side being perpendicular to the thickness direction of the pole piece substrate.

[0006] In an embodiment of the present application, a first detection device is provided in the pole piece detection and control system, and the first detection device is used to detect the size of the area to be coated on the first surface of the pole piece substrate output by the unwinding device, the first surface is perpendicular to the thickness direction of the pole piece substrate, and the first detection device is arranged between the unwinding device and the first-side coating device. 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 surface of the pole piece substrate in 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 consistency of the coating size of the pole piece, and then improving the yield and quality of the pole piece, while improving the manufacturing efficiency of the pole piece.

[0007] In some implementations, the pole piece detection 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 pole piece substrate according to the detection result of the first detection device.

[0008] In an embodiment of the present application, a first cutting device is provided in the pole piece detection and control system, and the first cutting device is used to adjust the size of the coating film corresponding to the area to be coated on the first surface of the pole piece substrate in the first-side coating device according to the detection result of the first detection device, and the first cutting device is arranged between the first detection device and the first-side coating device. The first cutting device can timely adjust the size of the coating film corresponding to the area to be coated on the first surface of the pole piece substrate in the first-side coating device according to the detection result of the first detection device, so as to reduce the risk of pole piece scrapping due to untimely detection, improve the consistency of the coating size of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0009] 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.

[0010] 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 surface of the first electrode output by the first-surface coating device, and the second detection device is arranged between the first-surface coating device and the first-surface drying device. The electrode detection and control system can timely adjust the position of the electrode substrate output by the unwinding device according to the detection result of the second detection device, thereby reducing the risk of electrode scrapping due to untimely detection, improving the consistency of the coating size of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0011] In some implementations, the electrode detection control system also includes: a first deviation correction device, which is arranged between the unwinding device and the first-side coating device, and the first deviation 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.

[0012] In an embodiment of the present application, the first deflection correction device is provided in the pole piece detection and control system, and the first deflection correction device is used to adjust the position of the pole piece substrate outputted by the unwinding device according to the detection result of the second detection device, and the first deflection correction device is provided between the unwinding device and the first-side coating device, and the first deflection correction device can timely adjust the position of the pole piece substrate outputted by the unwinding device according to the detection result of the second detection device, so that the coating film position corresponding to the area to be coated on the first side of the pole piece substrate outputted by the unwinding device in the first-side coating device matches the position of the area to be coated on the first side, thereby effectively reducing the risk of pole piece scrapping due to untimely detection, further improving the coating size consistency of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0013] 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.

[0014] 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 surface of the first electrode outputted by the first-surface drying device, and the third detection device is arranged between the first-surface drying device and the second-surface coating device. The electrode detection and control system can timely adjust the size of the area to be coated on the second surface of the first electrode outputted by the first-surface drying device and 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 in the second-surface 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 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.

[0015] 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.

[0016] 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 arranged 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 consistency of the coating size of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0017] 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 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.

[0018] 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 outputted 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 timely adjust the position of the first electrode outputted by the first drying device 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 further improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0019] 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 by the first-side drying device according to the detection result of the fourth detection device.

[0020] In an embodiment of the present application, the second deflection correction device is provided in the electrode detection and control system, and the second deflection correction 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 deflection correction device is provided between the first-side drying device and the second-side coating device, and the second deflection correction 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 area to be coated on the second side of the first electrode outputted by the first drying device in the second coating device 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.

[0021] In some implementations, the electrode detection 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 drying device; the second correction device is also used to adjust the position of the first electrode output by the first drying device according to the detection results of the fifth detection device and the fourth detection device.

[0022] 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 coated area on the first surface of the first electrode output by the first drying device, and the fifth detection device is arranged 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 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 surface and the second surface 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.

[0023] 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 coating device includes at least two calendering rollers, and the first-side coating device is used to adjust the distance between any two calendering rollers of the at least two calendering rollers and the rolling pressure according to the detection results of the sixth detection device.

[0024] 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 between any two of the at least two calendering rollers in the first-side coating device and the rolling pressure 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.

[0025] 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 coating device includes at least two calendering rollers, and the second-side coating device is used to adjust the distance between any two calendering rollers of the at least two calendering rollers and the rolling pressure according to the detection result of the seventh detection device.

[0026] 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 between any two of the at least two calendering rollers in the second-side coating device and the rolling pressure 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.

[0027] In some implementations, at least one supporting roller may be provided on one side or both sides of at least two calendering rollers in the first coating device and / or the second 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.

[0028] In an embodiment of the present application, when at least two calendering rollers in the first coating device and / or the second coating device rotate, the at least one supporting 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 pole piece, and improving the thickness consistency of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a vehicle provided in one embodiment of the present application.

[0031] Figure 2 It is a schematic diagram of the structure of a battery provided in one embodiment of the present application.

[0032] Figure 3 It is a structural schematic diagram of a battery cell provided in one embodiment of the present application.

[0033] Figure 4 It is a schematic block diagram of the process of a pole piece detection control system provided in one embodiment of the present application.

[0034] Figure 5 It is a schematic block diagram of the process of another pole piece detection control system provided in another embodiment of the present application.

[0035] Figure 6 It is a flow chart of another pole piece detection control system provided in another embodiment of the present application.

[0036] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0037] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the embodiments of the present application, but cannot be used 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.

[0038] 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 belonging to 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 specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0040] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0042] 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).

[0043] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and 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, and therefore should not be understood as a limitation on the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0046] The battery in the embodiments of the present application refers to a physical module including one or more battery cells to provide electrical energy. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can reduce the impact of liquid or other foreign matter on the charging or discharging of the battery cells.

[0047] 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.

[0048] 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, a magnesium metal battery, or the like.

[0049] 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 embedded and removed back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0050] In some implementations, the positive electrode may be a positive electrode sheet, and the positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0051] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0052] 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, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used. The composite current collector may include a polymer material base 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.).

[0053] 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. Among them, examples of lithium-containing phosphates may include, but are not limited to, lithium iron phosphate (such as LiFePO4, which may also be 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 at least one of a composite material of lithium iron manganese phosphate and carbon.

[0054] 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 compound:

[0055] 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 x In MO2, x can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.

[0056] In some implementations, the sodium transition metal oxide may be a doped sodium transition metal oxide, 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.

[0057] In some implementations, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or a carbon foam. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal, or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0058] In some implementations, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0059] As an example, the negative electrode current collector can be a metal foil, a foamed metal or a composite current collector. For example, as a metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. can be used. The composite current collector may include a polymer material base and a metal layer. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an 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.).

[0060] In some implementations, the battery cell in the embodiments of the present application may be a negative electrode-free sodium secondary battery.

[0061] 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, a sodium metal or carbonaceous active material layer is not set at the negative electrode through coating or deposition to form a negative electrode active material layer during the manufacturing process of the battery cell. During the first charge, the sodium ions obtain electrons on the anode side to deposit on the surface of the current collector to form a sodium metal phase. During discharge, the metallic sodium can be converted into sodium ions and return to the positive electrode to achieve cyclic charge and discharge. Compared with other sodium secondary batteries, negative electrode-free sodium secondary battery cells can achieve higher energy density because they do not have a negative electrode active material layer.

[0062] 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.

[0063] In some implementations, the CB value of the negative electrode-free sodium secondary battery is less than or equal to 0.1.

[0064] Specifically, the CB value is the unit area capacity of the negative electrode plate in the secondary battery divided by the unit area capacity of the positive electrode plate. Since the negative electrode-free battery does not contain or only contains a small amount of functional coating, the unit area capacity of the negative electrode plate is small, and the CB value of the secondary battery is less than or equal to 0.1.

[0065] 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.

[0066] In some implementations, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0067] In some implementations, the isolation member is an isolation membrane. The embodiment of the present application has no particular limitation on the type of isolation membrane, and any known porous structure isolation membrane with good chemical stability and mechanical stability can be selected.

[0068] 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.

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

[0070] In some implementations, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application embodiment has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0071] 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.

[0072] In some implementations, the electrode assembly is a laminate structure. As an example, a plurality of positive plates and a plurality of negative plates may be provided, respectively, and the plurality of positive plates and the plurality of negative plates may be alternately stacked.

[0073] 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.

[0074] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0075] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0076] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0077] In some implementations, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0078] In some implementations, the electrode assembly is provided with tabs, which can conduct current from the electrode assembly. The tabs include a positive tab and a negative tab.

[0079] In some implementations, the 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 (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0080] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery.

[0081] 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 a hybrid connection, where the hybrid connection refers to a mixture of series and parallel connections. Optionally, multiple battery cells can first be connected in series, in parallel, or in a hybrid connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in a 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.

[0082] At present, with the increasing environmental pollution, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development. The development of battery technology needs to consider many design factors, such as energy density, cycle life, yield rate, etc. The production process of batteries is relatively complicated, including multiple processes, such as stirring process, coating process, rolling process, die-cutting process, winding process, liquid injection process and formation process. Among them, the coating process is an important link that cannot be ignored. Its influence on battery performance is crucial. The stability, uniformity and size of its coating will affect the final performance of the battery. Among them, the size of the coated AB surface. Including position size, width size, AB surface misalignment size, etc., all have a great influence on the performance of the battery. The pole piece design in the battery cell is crucial to the yield and performance of the battery cell.

[0083] When the battery industry is in the preliminary research stage of continuous production of electrodes, the premixed powder cannot form a uniform film, and the film cannot be continuously rolled after forming. The powder is rolled and thinned to form a self-supporting membrane, and the weight fluctuation is large and the consistency is poor. It also reduces the overall efficiency of the equipment and the possibility of mass production is small. 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 roll-pressed film has uneven lateral thickness, which makes the yield rate of the electrode sheet 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 sheet, which makes the size consistency of the electrode sheet poor, and the debugging time after quality problems occur is too long. Therefore, how to improve the yield rate of the electrode sheet has become a technical problem that needs to be solved urgently in this field.

[0084] In view of this, the embodiment of the present application provides a pole piece detection control system, characterized in that it is applied to a 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, the first detection device is arranged between the unwinding device and the first surface coating device, the first detection device is used to detect the size of the area to be coated on the first surface of the pole piece substrate output by the unwinding device, and the first surface is perpendicular to the thickness direction of the pole piece substrate. In this way, in the embodiment of the present application, the pole piece detection control system can timely adjust the size of the coating film corresponding to the area to be coated on the first surface of the pole piece substrate or the first surface 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 consistency of the coating size of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0085] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric 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.

[0086] 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 equipment using batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0087] For example, Figure 1As shown, 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 arranged 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 arranged 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 start-up, 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.

[0088] 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 multiple battery cells, wherein the multiple battery cells can be electrically connected in series, parallel or mixed to form the battery 10, wherein mixed refers to a mixture of series and parallel. The battery 10 may also be referred to as a battery pack. For example, multiple battery cells can first be connected in series, parallel or mixed to form a battery module, and multiple battery modules can then be connected in series, parallel or mixed to form a battery 10. In other words, multiple battery cells can directly form a battery 10, or they can be first formed into a battery module, and then the battery modules can be formed into a battery 10.

[0089] In some implementations, the battery 10 may include a plurality of battery cells. Figure 2 , which is a schematic diagram of the structure of a battery 10 according to an embodiment of the present application, wherein the battery 10 may include a plurality of battery cells 20. The battery 10 may also include a housing 11, wherein the interior of the housing 11 is a hollow structure, and the plurality of battery cells 20 are accommodated in the housing 11. For example, the plurality of battery cells 20 are connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0090] In some implementations, the battery 10 may also include other structures, which are not described one by one here. For example, the battery 10 may also include a busbar component, which is used to realize electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can realize 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 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.

[0091] In an 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, in parallel or in a mixed manner to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, in order to facilitate 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, in parallel or in a mixed manner.

[0092] like Figure 3 As shown, it is a schematic diagram of the structure of a battery cell 20 according to an embodiment of the present application, and 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 a shell or battery box 21. The walls of the shell 211 and the cover plate 212 are both called the walls of the battery cell 20, wherein for a rectangular battery cell 20, the wall of the shell 211 includes a bottom wall and four side walls. The shell 211 is determined according to the shape of one or more electrode assemblies 22 after combination. For example, the shell 211 can be a hollow cuboid or 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 body so that the inside and outside of the shell 211 are connected. When the shell 211 can be a hollow cylinder, the end surface of the shell 211 is an open surface, that is, the end surface has no wall so that the inside and outside of the shell 211 are connected. The cover plate 212 covers the opening and is connected to the shell 211 to form a closed cavity for placing the electrode assembly 22. The shell 211 is filled with an electrolyte, such as an electrolyte.

[0093] 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 generally in the shape of a flat plate, and the two electrode terminals 214 are fixed on the flat surface of the cover plate 212, and the two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connection member, or may also be referred to as a current collecting member, which is located between the cover plate 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0094] like Figure 3 As shown, each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarities of the first electrode tab 221a and the second electrode tab 222a are opposite. For example, when the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab.

[0095] In the battery cell 20, according to actual use requirements, the electrode assembly 22 can be provided as a single electrode assembly or a plurality of electrodes. Figure 3 As shown, two independent electrode assemblies 22 are disposed in the battery cell 20 .

[0096] 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.

[0097] The pressure relief mechanism 213 may be a variety of possible pressure relief structures. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism, which is configured to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and / or, the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism, which is configured to rupture when the internal gas pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

[0098] Figure 4 A schematic block diagram of the process of a pole piece detection control system 100 provided in one embodiment of the present application is shown.

[0099] In some implementations, such as Figure 4 As shown, the electrode detection and control system 100 can be applied to the 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, and 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, and the first detection device 105 is used to detect the size of the to-be-coated area 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.

[0100] 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.

[0101] It should also be understood that the area to be coated on the first surface of the above-mentioned electrode substrate is the area where the slurry needs to be coated. The first surface can be one of the surfaces on the electrode substrate where 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.

[0102] It should also be understood that the size of the area to be coated on the first surface of the pole piece substrate in the embodiment of the present application may be the size of the area to be coated along the width direction of the pole piece substrate. The slurry in the embodiment of the present application may also be referred to as an active material. If the pole piece substrate includes aluminum foil, the slurry may include lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. If the pole piece substrate includes copper foil, the slurry may include carbon or silicon, etc.

[0103] 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 pole piece substrate output by the unwinding device 101, and the tab formation area is used to form the tab portion of the pole piece, and then determine the size of the area to be coated. The first detection device 105 can be any type of imaging device that can achieve the above functions. For example, the first detection device 105 can be a charge coupled device (CCD) visual system.

[0104] In an embodiment of the present application, a first detection device 105 is provided in the electrode detection and control system 100, and 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 timely 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 according to the detection result of the first detection device 105, thereby reducing the risk of electrode scrapping due to untimely detection, improving the consistency of the coating size of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0105] In some implementations, such as Figure 4 As shown, the electrode detection 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, 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.

[0106] 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 again to detect the size of the area to be coated on the first side of the electrode substrate output by the unwinding device 101; 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 achieve closed-loop control.

[0107] Thus, in an embodiment of the present application, a first cutting device 106 is provided in the pole piece 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 pole piece substrate in the first-side coating device 102 according to the detection result of the first detection device 105, and the first cutting device 102 is arranged between the first detection device 105 and the first-side coating device 102, and 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 pole piece 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 pole piece scrapping due to untimely detection, improve the consistency of the coating size of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0108] In some implementations, such as Figure 4 As shown, 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, and 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.

[0109] It should be understood that the coating area on the first surface of the first electrode piece output by the first surface coating device 102 in the embodiment of the present application refers to the area formed after the first surface of the electrode substrate is coated by the first surface coating device 102. The size of the coating area on the first surface of the first electrode piece output by the first surface coating device 102 in the embodiment of the present application can be the size along the width direction of the first electrode piece. The second detection device 107 can be various imaging devices capable of realizing the above functions, for example, the second detection device 107 can be a CCD visual system.

[0110] 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 time according to the detection result of the second detection device 107, thereby reducing the risk of electrode scrapping due to untimely detection, improving the consistency of the coating size of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0111] In some implementations, such as Figure 4 As shown, the electrode detection and control system 100 also includes a first deviation correcting device 108, which is arranged between the unwinding device 101 and the first surface coating device 102, and the first deviation 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.

[0112] In an embodiment of the present application, by setting the first deflection correction device 108 in the pole piece detection and control system 100, the first deflection correction device 108 is used to adjust the position of the pole piece substrate output by the unwinding device 101 according to the detection result of the second detection device 107, and the first deflection correction device 108 is set between the unwinding device 101 and the first-side coating device 102. The first deflection correction device 108 can timely adjust the position of the pole piece 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 pole piece 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 pole piece scrapping due to untimely detection, further improving the coating size consistency of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0113] Figure 5A schematic block diagram of the process of a pole piece detection control system 300 provided in another embodiment of the present application is shown.

[0114] It should be understood that in the embodiments of the present application, in order to reduce redundancy, Figure 4 The unwinding device 101, the first correcting device 108, the first detecting device 105, the first cutting device 106, the first surface coating device 102, the second detecting device 107 and the first surface drying device 103 shown in the electrode detection control system 100 can be replaced by the first device 200.

[0115] In some implementations, such as Figure 5 As shown, the electrode coating system also includes a second surface coating device 109 and a second surface drying device 110 sequentially arranged between the first surface drying device 103 and the winding device 104, and the electrode detection control system 300 may include a third detection device 111, which is arranged between the first surface drying device 103 and the second surface coating device 109, and the third detection device 111 is used to detect the size of the area to be coated on the second surface of the first electrode output by the first surface drying device 103, and the second surface is perpendicular to the thickness direction of the first electrode.

[0116] 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 slurry. The second surface can be one of the surfaces on 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.

[0117] 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.

[0118] 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 by 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 first detection device 111 can be a CCD visual system.

[0119] 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 arranged 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 consistency of the coating size of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0120] In some implementations, such as Figure 5 As shown, the electrode detection 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, and 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 side of the first electrode output 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.

[0121] 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 retrying. 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 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 again by the third detection device 111 to realize closed-loop control.

[0122] In an embodiment of the present application, a second cutting device 112 is provided in the electrode detection control system 300, and 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-side 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 consistency of the coating size of the electrode, thereby improving the yield and quality of the electrode, and at the same time improving the manufacturing efficiency of the electrode.

[0123] In some implementations, such as Figure 5 As shown, the electrode coating system also includes a second surface coating device 109 and a second surface drying device 110 which are sequentially arranged between the first surface drying device 103 and the winding device 104, and the electrode detection control system 300 also includes: a fourth detection device 113, which is arranged between the second surface coating device 109 and the second surface drying device 110, and the fourth detection device 113 is used to detect the size of the coating area on the second surface of the first electrode output by the second surface coating device 109.

[0124] It should be understood that the coating area on the second surface of the first pole piece output by the second surface coating device 109 in the embodiment of the present application refers to the area formed after the second surface of the first pole piece is coated by the second surface coating device 109. The size of the coating area on the second surface of the first pole piece output by the second surface coating device 109 in the embodiment of the present application can be the size along the width direction of the first pole piece. The fourth detection device 113 can be various imaging devices that can realize the above functions. For example, the fourth detection device 113 can be a CCD visual system.

[0125] 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 arranged 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 drying device 103 in time according to the detection result of the fourth detection device 113, thereby reducing the risk of electrode scrapping due to untimely detection, improving the consistency of the coating size of the electrode, and then improving the yield and quality of the electrode, while improving the manufacturing efficiency of the electrode.

[0126] In some implementations, such as Figure 5 As shown, the electrode detection and control system 300 also includes a second correcting device 114, which is arranged between the first surface drying device 103 and the second surface coating device 109, and the second correcting 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.

[0127] In an embodiment of the present application, the second deflection correction device 114 is provided in the electrode detection and control system 300, and the second deflection correction 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 deflection correction device 114 is provided between the first-side drying device 103 and the second-side coating device 109, and the second deflection correction 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 drying device 103 in the second 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.

[0128] In some implementations, such as Figure 5 As shown, the electrode detection 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, and the fifth detection device 115 is used to detect the size of the coating area on the first side of the first electrode output by the first drying device 103; the second correction device 114 is also used to adjust the position of the first electrode output by the first drying device 103 according to the detection results of the fifth detection device 115 and the fourth detection device 113.

[0129] 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 pole piece detection control system 300, the fourth detection device 113 detects the size of the coated area on the second side of the first pole piece output by the second-side coating device 109, and the fifth detection device 115 detects the size of the coated area on the first side of the first pole piece output by the first drying device 103, and multiple dislocation values ​​are determined 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 coated area on the first side of the first pole piece and the reference edge and the distance between the edge of the coated area on the second side of the first pole piece 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, the fourth detection device is passed again after waiting for the next closed-loop data acquisition control cycle. The device 113 detects the size of the coating area on the second side of the first electrode piece output by the second-side coating device 109, and detects the size of the coating area on the first side of the first electrode piece output by the first drying device 103 through the fifth detection device 115; if the closed-loop adjustment amount is not 0, the second correction device 114 is called to adjust the position of the first electrode piece output by the first drying device 103, so that the misalignment value between the first side and the coating area on the second side of the first electrode piece 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 then detect the size of the coating area on the second side of the first electrode piece output by the second-side coating device 109 again through the fourth detection device 113, and detect the size of the coating area on the first side of the first electrode piece output by the first drying device 103 through the fifth detection device 115, so as to realize closed-loop control.

[0130] 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 drying device 103, and the fifth detection device 115 is arranged 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 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.

[0131] In some implementations, such as Figure 4 As shown, the electrode detection 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 coating device 102 includes at least two calendering rollers, and the first-side coating device 102 is used to adjust the distance between any two calendering rollers of the at least two calendering rollers and the rolling pressure according to the detection result of the sixth detection device 116.

[0132] It should be understood that the sixth detection device 116 in the embodiment of the present application can be an automated measurement system, which uses automated equipment and systems to continuously or high-speed measure the weight and / or thickness of the first electrode piece output by the first-side coating device 102 through a sensor or a weighing device to improve detection efficiency and accuracy. Exemplarily, the sixth detection device 116 includes but is not limited to a laser side thickness device, a β-ray or X-ray side weight detection device.

[0133] 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 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, while improving the manufacturing efficiency of the electrode.

[0134] 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 between any two of the at least two calendering rollers in the first-side coating device 102 and the rolling pressure 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.

[0135] In some implementations, such as Figure 5As shown, the electrode detection 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 coating device includes at least two calendering rollers, and the second-side coating device 109 is used to adjust the distance between any two calendering rollers of the at least two calendering rollers and the rolling pressure according to the detection result of the seventh detection device 117.

[0136] It should be understood that the seventh detection device 117 in the embodiment of the present application can be an automated measurement system, which uses automated equipment and systems to continuously or high-speed measure the weight and / or thickness of the first pole piece output by the second-side coating device 109 through a sensor or a 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 β-ray or X-ray side weight detection device.

[0137] 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 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, while improving the manufacturing efficiency of the electrode.

[0138] 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, and the electrode detection and control system 300 can adjust the distance between any two of the at least two calendering rollers in the second-side coating device 109 and the rolling pressure 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.

[0139] In some implementations, at least one supporting roller may be provided on one or both sides of at least two calendering rollers in the first coating device 102 or the second coating device 109 in the embodiment of the present application, 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. Exemplarily, a supporting roller may be provided on each of the left and right sides of three continuously arranged calendering rollers in the second coating device 109, that is, the three continuously horizontally arranged calendering rollers are provided between the two supporting rollers, and the axis of the supporting 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.

[0140] In an embodiment of the present application, when at least two calendering rollers in the first coating device 102 or the second coating device 109 rotate, the at least one supporting 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 pole piece, and improving the thickness consistency of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0141] In some implementations, such as Figure 6 As shown, the second coating device 109 may include a thinning roller 1091, a transfer roller 1092 and a composite roller 1093 arranged in sequence. When the film to be coated is thinned, there will be a reaction force on the calendering roller, which will cause the roller to be deformed, thereby affecting the thinning effect of the film and reducing the yield rate of the electrode. In some implementations, such as Figure 6 As shown, the diameter of the thinning roller 1091 can be reduced to reduce the roller pressure, thereby improving the deflection deformation of the thinning roller 1091, reducing the impact on the uniformity of the diaphragm, and improving the yield and quality of the pole piece. In other implementations, at least one supporting 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 the movement, thereby improving the thickness consistency of the pole piece, thereby improving the yield and quality of the pole piece, and at the same time improving the manufacturing efficiency of the pole piece.

[0142] Figure 6 FIG. 4 is a flow chart of a pole piece detection control system 400 provided in another embodiment of the present application. In some implementations, Figure 6As shown, the electrode detection control system 400 includes an unwinding device 101, a first deflection correcting device 108, a first detection device 105, a first cutting device 106, a first surface coating device 102, a second detection device 107, a sixth detection device 116, a first surface drying device 103, a second deflection correcting device 114, a fifth detection device 115, a third detection device 111, a second cutting device 112, a second surface coating device 109, a fourth detection device 113, a seventh detection device 117, a second surface drying device 110 and a winding device 104 which are arranged in sequence.

[0143] Although the present application has been described with reference to the above embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling 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 7 or 8, characterized in that: The pole piece detection control system also includes: a fifth detection device, the fifth detection device being disposed between the first-side drying device and the second-side coating device, and being used to detect a size of a coating area on the first side of the first electrode piece output by the first drying device; The second deviation-correcting device is further used to adjust the position of the first electrode piece output by the first 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 coating device comprises at least two calendering rollers, and the first surface 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 coating device comprises at least two calendering rollers, and the second surface coating device is used for adjusting 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 coating device and / or the second 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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