Spraying device and battery production line

Abstract

A spraying device and a battery production line. The spraying device comprises: an upper positioning mechanism (300); a lower positioning mechanism (400), which is arranged opposite and spaced apart from the upper positioning mechanism (300) in a vertical direction, wherein an accommodating space (500) for accommodating a stack (90) is formed between the upper positioning mechanism (300) and the lower positioning mechanism (400), and the upper positioning mechanism (300) and the lower positioning mechanism (400) are configured to be capable of clamping the stack (90) and driving the stack (90) to rotate about its own axis; and at least one spraying and curing assembly, which can spray and cure a peripheral side of the stack (90) placed in the accommodating space (500).

Description

Spraying equipment and battery production line

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 2024218261895, filed on July 31, 2024, entitled “Spraying Apparatus and Battery Production Line”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a spraying apparatus and a battery production line. Background Technology

[0004] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0005] Currently, batteries formed from electrodes often suffer from poor insulation during the production process, leading to unstable battery quality.

[0006] Summary of the Invention

[0007] Therefore, it is necessary to provide a spraying device and a battery production line to address the problem of poor insulation.

[0008] The first aspect of this application provides a spraying apparatus for spraying a stack of electrodes and separators. The spraying apparatus includes: an upper positioning mechanism; a lower positioning mechanism, vertically spaced from the upper positioning mechanism, with a receiving space between the upper and lower positioning mechanisms for accommodating the stack; the upper and lower positioning mechanisms are configured to clamp the stack and rotate it; and at least one spraying and curing assembly capable of spraying and curing the periphery of the stack placed in the receiving space. This allows for the simultaneous processing of multiple electrodes in the stack, significantly improving processing efficiency and saving time. Furthermore, since the insulating adhesive is uniformly sprayed onto the periphery of the stack, it effectively solves the problem of difficult-to-process cut edges due to the large area and thinness of individual electrodes. The cut edges of multiple electrodes can be simultaneously insulated and cured, forming a stable insulating adhesive coating on the cut edges of each electrode. This effectively reduces metal overlap between the cut edges of adjacent electrodes, thereby effectively improving the insulation quality of the battery and ensuring stable product quality.

[0009] In one embodiment, the spray curing assembly includes a nozzle and a lamp head. The nozzle of the nozzle extends along the vertical direction; the lamp head is fixed to the side of the nozzle, and the area irradiated by the lamp head along the vertical direction is not less than the height of the receiving space. This ensures that the insulating adhesive at all locations is cured by the light from the lamp head, resulting in a stable insulating adhesive coating on the cut edges of each electrode sheet, thereby effectively improving the insulation quality of the battery and ensuring stable battery product quality.

[0010] In one embodiment, the lamp head is a UV adhesive curing lamp.

[0011] In one embodiment, the spraying apparatus includes two spraying and curing components, which are respectively arranged on opposite sides of the receiving space. This facilitates the spraying and curing components to uniformly spray insulating adhesive onto the periphery of the stack and complete the curing process.

[0012] In one embodiment, the spraying device includes a frame; the upper positioning mechanism is fixed to the top of the frame; the lower positioning mechanism is fixed to the bottom of the frame; the spraying and curing assembly is fixedly connected to the frame; the lower positioning mechanism, the accommodating space, and the upper positioning mechanism are coaxially arranged, and the spraying and curing assembly is located outside the accommodating space. Thus, the lower positioning mechanism, the stacked body in the accommodating space, and the upper positioning mechanism can all rotate around a rotation axis, thereby preventing the stacked body from flying off during rotation; this facilitates the spraying and curing assembly to uniformly spray insulating adhesive onto the periphery of the stacked body and complete curing; it effectively reduces the overlap of the cut edges of adjacent electrode sheets, thereby effectively improving the insulation quality of the battery and ensuring stable battery product quality.

[0013] In one embodiment, the upper positioning mechanism includes a first turntable, a telescopic device, and a fixed base. The two ends of the telescopic device are respectively connected to the fixed base and the first turntable. The first turntable is used to press against the top of the stack, and the fixed base is fixedly connected to the frame. Thus, the telescopic device can drive the first turntable downwards or upwards in the vertical Z direction. When the telescopic device drives the first turntable downwards in the vertical Z direction, the first turntable presses against the top of the stack, thereby keeping the first turntable of the upper mechanism fixed to the stack, causing the stack to rotate. The spraying and curing component then uniformly sprays insulating adhesive onto the periphery of the stack and completes curing. When the telescopic device drives the first turntable upwards in the vertical Z direction, the first turntable separates from the stack, facilitating the insertion or removal of the electrode sheets and separator sheets from the stack.

[0014] In one embodiment, the telescopic device is a cylinder, and the cylinder body of the telescopic device is detachably connected to the fixed base; the piston rod of the telescopic device is rotatably connected to the first turntable.

[0015] In one embodiment, the lower positioning mechanism includes a second turntable, a driver, and a support column. The second turntable is used to support the bottom end of the stack. The bottom end of the support column is rotatably connected to the frame. The top end of the support column is supported below the second turntable, and the driver is used to drive the support column to rotate. Thus, the support column is supported between the second turntable and the bottom side plate of the frame. The driver drives the support column to rotate, thereby causing the second turntable to rotate, which in turn causes the stack located on the second turntable to rotate. This facilitates the spraying and curing assembly to uniformly spray insulating adhesive onto the periphery of the stack and complete the curing process. This effectively reduces the overlap of the cut edges of adjacent electrodes, thereby effectively improving the insulation quality of the battery and ensuring stable product quality.

[0016] In one embodiment, the driver is a motor, the driver is fixed to the frame, a transmission gear is fixed to the outer periphery of the support column, and an output gear that meshes with the transmission gear is provided at the end of the driver's rotating shaft.

[0017] In one embodiment, the projection area of ​​the first turntable completely covers the stack when projected along the vertical direction; and / or, the projection area of ​​the second turntable completely covers the stack when projected along the vertical direction. This ensures that the coating and curing assembly only sprays insulating adhesive onto the cut edges around the electrodes, avoiding the application of insulating adhesive to the surface of the electrodes, thus ensuring stable battery quality.

[0018] In one embodiment, the spraying apparatus includes a conveying mechanism, a transfer mechanism, and a carrier tray; the conveying mechanism is arranged on one side of the receiving space for conveying the electrode sheet; the carrier tray is arranged on the other side of the receiving space for carrying the separator sheet; the transfer mechanism is capable of transferring the electrode sheet from the conveying mechanism to the receiving space and transferring the separator sheet from the carrier tray to the receiving space. Thus, the conveying mechanism, transfer mechanism, carrier tray, upper positioning mechanism, and lower positioning mechanism can cooperate to complete the function of the spraying apparatus.

[0019] In one embodiment, the transfer mechanism includes two sets of robotic arms and guide rails; the guide rails are mounted above the conveying mechanism and the carrier tray; one set of robotic arms is slidably disposed on the guide rails and is used to transfer the electrode sheet from the conveying mechanism to the receiving space; the other set of robotic arms is slidably disposed on the guide rails and is used to transfer the separator sheet from the carrier tray to the receiving space. Thus, with two sets of robotic arms sliding on the guide rails respectively, one set of robotic arms is used to transfer the electrode sheet from the conveying mechanism to the receiving space; the other set of robotic arms is used to transfer the separator sheet from the carrier tray to the receiving space; they do not interfere with each other, resulting in high transfer efficiency and improving the overall production efficiency of the coating device.

[0020] In one embodiment, the robotic arm includes a connecting rod, a negative pressure suction cup, a lifting unit, and a driving unit; one end of the connecting rod is movably mounted on the guide rail, and the driving unit is connected to the connecting rod in a transmission manner; the lifting unit is connected between the other end of the connecting rod and the negative pressure suction cup. Thus, the loading and unloading functions of the spraying device can be completed through the movement of the robotic arm.

[0021] A second aspect of this application provides a battery production line, including the aforementioned coating apparatus.

[0022] A third aspect of this application provides a battery production line, including an unwinding mechanism, a plurality of rotating drums, a pressure roller pair, a cutter, and the aforementioned spraying device; all the rotating drums are spaced apart between the unwinding mechanism and the feed side of the pressure roller pair, the conveying mechanism is connected to the discharge side of the pressure roller pair, and the cutter is disposed between the pressure roller pair and the conveying mechanism.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly described below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort. In the drawings:

[0025] Figure 1 is a schematic diagram of the structure of a spraying device provided in some embodiments of this application.

[0026] Figure 2 is a three-dimensional structural schematic diagram of a spraying apparatus provided in some other embodiments of this application, wherein the frame is omitted.

[0027] Figure 3 is a schematic diagram of the structure of a spraying device provided in some embodiments of this application.

[0028] Figure 4 is a top view showing the positional relationship between the accommodating space, the robotic arm, and the guide rail provided in some embodiments of this application.

[0029] Figure 5 is a schematic diagram of the structure of a battery production line provided in some embodiments of this application.

[0030] The attached diagram shows the following components: stacked body - 90, electrode - 91, separator - 92, rotating axis - 93, frame - 100, spray curing assembly - 200, nozzle - 210, lamp holder - 220, bracket - 230, upper positioning mechanism - 300, first turntable - 310, telescopic device - 320, piston rod - 321, cylinder body - 322, fixed seat - 330, first bearing - 340; lower positioning mechanism - 400, second turntable - 410, driver - 420, rotating shaft - 421, output gear - 423, support column - 430, transmission gear - 431, second... Bearing-440, Accommodation space-500, Conveying mechanism-600, Transfer mechanism-700, Robotic arm-710, Connecting rod-711, Negative pressure suction cup-712, Lifting unit-713, Drive unit-714, Guide rail-720, Carrier plate-800, Unwinding mechanism-910, Material strip-911, Rotary drum-920, Pressing rollers-930, Driven roller-931, Drive roller-932, Cutter-940. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of this application, if the technical terms such as "first" and "second" appear, these terms are used only for descriptive purposes to distinguish different objects, and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0035] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the description of the embodiments of this application, if the term "multiple" appears, "multiple" means at least two (including two), such as two, three, etc., unless otherwise explicitly specified. Similarly, if the term "multiple sets" appears, "multiple sets" refers to two or more sets (including two sets), and if the term "multiple pieces" appears, "multiple pieces" refers to two or more pieces (including two pieces).

[0037] In the description of the embodiments of this application, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0038] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0042] Traditional batteries are typically formed by stacking and winding positive, negative, and other electrodes. Among related technologies, all-solid-state batteries are one of the future development trends of power batteries, possessing advantages such as high density, high energy density, and good safety. Due to their structural characteristics, all-solid-state batteries often lack a separator, instead using stacked electrodes. The battery voltage is determined by the number of electrode layers. This stacked structure is more suitable for manufacturing high-voltage batteries, such as those with tens or even hundreds of volts. However, after cutting these electrodes, the need for a separatorless stacking process often exposes the metal inside the electrode at the cut edges. Furthermore, the stacked electrodes are often large in area and thin, making it very difficult to insulate the cut edges. Once adjacent electrodes overlap after stacking, insulation problems arise, potentially leading to a short circuit in the battery.

[0043] To alleviate the problem of poor insulation, a spraying and curing component, an upper positioning mechanism, and a lower positioning mechanism can be added to the design of the spraying device. The electrode is placed between the upper and lower positioning mechanisms, which drive the electrode to rotate. The spraying and curing component can spray and cure the periphery of the electrode placed in the receiving space. In this way, the difficulty in handling the cutting edge of a single electrode due to its large area and thinness can be effectively improved, and the overlap of the cutting edges of adjacent electrodes can be effectively reduced, thereby effectively improving the insulation quality of the battery and making the battery product quality more stable.

[0044] This application provides a spraying apparatus and a battery production line. The battery production line can produce, but is not limited to, all-solid-state batteries, as well as traditional rechargeable batteries. All-solid-state batteries can provide electrical energy to or store electrical energy in electrical devices. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0045] All-solid-state batteries typically consist of an electrode assembly formed by stacking a positive electrode, a solid electrolyte, and a negative electrode.

[0046] A negative electrode sheet typically includes a negative electrode current collector (not shown) and a negative electrode active material (not shown); the negative electrode active material is coated onto the negative electrode current collector. Specifically, the negative electrode active material is uniformly coated onto both sides of the negative electrode current collector, dried or air-dried, and then cut into appropriate sizes to obtain the negative electrode sheet.

[0047] The negative electrode current collector can have a protective layer, as is the case with lithium metal used in conventional secondary batteries employing an electrolyte solution. The protective layer can comprise any material, provided it has lithium-ion conductivity, does not interfere with battery operation, and does not react with lithium. For example, a ceramic protective layer, a lithium-ionized polyacrylic acid protective layer, etc., can be provided. The negative electrode current collector of the embodiments of this application can use any protective layer, as long as the protective layer improves the safety of the negative electrode active material.

[0048] Furthermore, pure lithium or pure lithium alloys can be used as the negative electrode current collector in the embodiments of this application, or the negative electrode active material can be coated onto lithium metal and dried for use. In some embodiments, the negative electrode current collector can also be a copper mesh or a steel mesh, depending on the design.

[0049] The negative electrode current collector can be formed to have a thickness of 2 micrometers (μm) to 1000 micrometers (μm). In order to increase the bonding force between the negative electrode current collector and the negative electrode active material or the solid electrolyte, a micro-sized concavo-convex structure can be formed on the surface of the negative electrode current collector, and the negative electrode current collector can be configured in any one of various forms (such as a film, sheet, foil, net, porous body, foam body or non-woven fabric body).

[0050] As the negative electrode active material, carbon (for example, non-graphitized carbon or graphite-like carbon), lithium metal, lithium alloy, silicon-based alloy, tin-based alloy, conductive polymer (such as polyacetylene), metal oxide (such as SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4 or Bi2O5) materials, metal composite oxides (such as LixFe2O3 (0≤x≤1), LixWO2 (0≤x≤1), SnxMe1-xMe'yOz; where, 0<x≤1; 1≤y≤3; 1≤z≤8; Me can represent manganese (Mn), iron (Fe), lead (Pb) or germanium (Ge); Me’ can represent aluminum (Al), boron (B), phosphorus (P), silicon (Si), Group 1, 2 and 3 elements of the periodic table, halogen) can be used.

[0051] The positive electrode sheet generally includes a positive electrode current collector (not shown) and a positive electrode active material (not shown), and the positive electrode active material is coated on the surfaces of both sides of the positive electrode current collector. In some embodiments, each side surface of the positive electrode current collector includes a central active material area and a blank area surrounding the central active material area, and the central active material area is used for coating the positive electrode active material.

[0052] The positive electrode current collector can be made of at least one material selected from stainless steel, aluminum, nickel, titanium, and aluminum or stainless steel surface-treated with carbon, nickel, titanium or silver.

[0053] The thickness of the positive electrode current collector can be controlled within the range of 2μm to 1000μm. Generally, the material for making the positive electrode current collector is not limited, as long as it can ensure that the positive electrode current collector has good conductivity and does not react with other substances in the all-solid-state battery in which the positive electrode current collector is applied.

[0054] The positive electrode current collector can be made of stainless steel, aluminum, nickel or titanium. In some other embodiments of the present application, the positive electrode current collector can be made of aluminum or stainless steel surface-treated with carbon, nickel, titanium or silver. A micro-sized concavo-convex structure can be formed on the surface of the positive electrode current collector to increase the adhesion force with the positive electrode active material. The positive electrode current collector can be configured in any one of various forms (such as a film, sheet, foil, net, porous body, foam body or non-woven fabric body).

[0055] The positive electrode active material includes a positive electrode active substance, a conductive agent, and a binder; the positive electrode active substance includes a positive electrode active substrate and a coating layer on the surface of the positive electrode active substrate, and the coating layer includes an ion conductor material.

[0056] Specifically, the general chemical formula of the positive electrode active substrate includes LiNixCoyMzO2, where x≥0, y≥0, z≥0, and x+y+z=1, and M can represent at least one of manganese (Mn), aluminum (Al), zirconium (Zr), titanium (Ti), vanadium (V), magnesium (Mg), iron (Fe), and molybdenum (Mo). For example, the positive electrode active substrate includes at least one of LiNi0.8Co0.1M0.1O2, LiNi0.83Co0.11M0.06O2, LiNi0.85Co0.09M0.06O2, or LiNi0.88Co0.09M0.03O2.

[0057] Ion conductor materials include at least one of Li₂TiO₃ (lithium titanate), LiNbO₃ (lithium niobate), Li₃BO₃ (lithium borate), Li₂ZrO₃ (lithium zirconate), LiCoO₃ (lithium cobalt oxide), LiPO₃ (lithium phosphate), Li₂MnO₄ (lithium manganese oxide), Al(PO₃)₃ (aluminum metaphosphate), La(PO₃)₃ (lanthanum metaphosphate), and NaPO₃ (sodium metaphosphate). It can be any one of these materials, or a combination of two or more, such as a combination of Li₂TiO₃, LiNbO₃, and Li₃BO₃, or a combination of LiCoO₃ and LiPO₃.

[0058] The coating thickness is 1–10 nm. In one embodiment, the coating thickness includes, but is not limited to, 2 nm, 3 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, and 10 nm. The aforementioned suitable coating thickness enables the positive electrode active material to possess excellent electrochemical performance.

[0059] Conductive agents can typically include graphite (e.g., natural or artificial graphite), carbon black (e.g., acetylene black, Ketjen black, channel black, furnace black, lamp black, or thermal black), conductive fibers (e.g., carbon fibers or metal fibers), metal powders (e.g., fluorinated carbon powder, aluminum powder, or nickel powder), conductive whiskers (e.g., zinc oxide or potassium titanate), conductive metal oxides (e.g., titanium oxide), or conductive materials (e.g., polyphenylene derivatives).

[0060] A binder is a component that facilitates the bonding between the positive electrode active material and the conductive agent, and the bonding with the positive electrode current collector. Based on the total weight of the complex including the positive electrode active material, the binder is typically added in an amount from 0.1 to 30% by weight. In the embodiments of this application, the binder is not particularly limited, and any known binder can be used. For example, the binder can be any one or a mixture of two or more selected from the group consisting of polyamide-imide (PAI), polyimide (PI), polyamide (PA), polyamic acid, polyethylene oxide (PEO), polystyrene (PS), poly(ethylene-co-propylene-co-5-methylene-2-norbornene) (PEP-MNB), polyvinylidene fluoride (PVDF), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), polystyrene-acrylonitrile-butadiene rubber (PS-NBR), poly(methacrylate)-acrylonitrile-butadiene rubber (PMMA-NBR), and mixtures thereof.

[0061] It should be noted that, unless otherwise stated, in the embodiments of this application, the electrode 91 can be a positive electrode or a negative electrode, and this application does not limit it in this regard.

[0062] Figure 1 is a structural schematic diagram of a spraying device provided in some embodiments of this application. Figure 2 is a three-dimensional structural schematic diagram of a spraying device provided in other embodiments of this application, wherein the frame is omitted. Figure 3 is a structural schematic diagram of a spraying device provided in some embodiments of this application. Figure 4 is a top view showing the positional relationship between the robotic arm, guide rail, and accommodating space provided in some embodiments of this application.

[0063] Referring to Figures 1 to 4, the first aspect of this application provides a spraying apparatus for spraying a stack 90 formed by an electrode 91 and a separator 92.

[0064] The spraying device includes an upper positioning mechanism 300, a lower positioning mechanism 400, and at least one spraying curing component 200.

[0065] The lower positioning mechanism 400 and the upper positioning mechanism 300 are arranged at a relative interval along the vertical direction Z. The upper positioning mechanism 300 and the lower positioning mechanism 400 together define the receiving space 500 for accommodating the stack 90. ​​The upper positioning mechanism 300 and the lower positioning mechanism 400 are configured to clamp the stack 90 and drive the stack 90 to rotate. The spraying and curing assembly 200 can spray and cure the periphery of the stack 90 placed in the receiving space 500.

[0066] In this arrangement, the electrode 91 and the separator 92 are stacked together in the accommodating space 500, and finally form a stack body 90 with a certain thickness. The stack body 90 is stacked in the vertical direction Z. The two ends of the stack body 90 are the horizontal planes where the outermost electrode 91 is located. The cut edges of all the electrode 91 and the four sides of all the separator 92 constitute the periphery of the stack body 90.

[0067] The stack 90 rotates around the rotation axis 93. The rotation axis 93 is a virtual axis that extends vertically in the Z direction and passes through the first turntable 310 of the upper positioning mechanism 300 (mentioned below), the stack 90, and the second turntable 410 of the lower positioning mechanism 400 (mentioned below).

[0068] The upper positioning mechanism 300 and the lower positioning mechanism 400 can clamp the two ends of the stack 90 along the vertical direction Z and drive the stack 90 to rotate at a preset speed. The spraying and curing component 200 is located outside the accommodating space 500, which facilitates the spraying and curing component 200 to uniformly spray insulating adhesive on the periphery of the stack 90 and complete the curing. In this way, multiple electrode sheets 91 in the stack 90 can be processed at one time, which greatly improves the processing efficiency and saves process time. Moreover, since the insulating adhesive is uniformly sprayed on the periphery of the stack 90, it can effectively solve the problem of individual electrode sheets 91 being limited by their area. When large and thin electrodes make it difficult to handle the cut edges, the cut edges of multiple electrodes 91 can be simultaneously insulated and cured. There is a separator 92 between two adjacent electrodes 91, so the large cut edges will not stick together. The cut edges of each electrode 91 form a stable insulating adhesive coating. When multiple electrodes 91 are stacked to produce batteries, since the cut edges are sprayed with insulating adhesive and cured accordingly, the metal overlap of the cut edges of adjacent electrodes 91 can be effectively reduced, thereby effectively improving the insulation quality of the battery and making the product quality of the battery stable.

[0069] It should be noted that the separator 92 is not part of the battery structure itself, but rather serves as an intermediate structure to separate adjacent electrode sheets 91 and prevent them from sticking together. After the periphery of a stack 90 is uniformly coated with insulating adhesive, the electrode sheets 91 and all separators 92 of that batch need to be removed separately. The separators 92 can be repeatedly stacked with the next batch of electrode sheets 91 to form a new stack 90 and placed in the receiving space 500 for insulating coating. The electrode sheets 91 that have already been insulatingly coated in this batch can be stacked to produce the required battery.

[0070] Understandably, the accommodating space 500 is a virtual space bounded by the first turntable 310 of the upper positioning mechanism 300 and the second turntable 410 of the lower positioning mechanism 400. Depending on the projected shape of the first turntable 310 and the second turntable 410, the accommodating space 500 can be a cylindrical space, a square columnar space, or other cylindrical spaces.

[0071] In some possible embodiments, referring to Figures 1 to 5, the spray curing assembly 200 includes a nozzle 210 and a lamp head 220. The nozzle 210 extends vertically. The lamp head 220 is fixed to the side of the nozzle 210, and the range A irradiated by the lamp head 220 in the vertical direction is not less than the height of the accommodating space 500.

[0072] The nozzle 210 and the lamp head 220 are integrally connected. Specifically, the lamp head 220 is fixed to the side of the nozzle 210, and the two can be connected by welding, bonding, or bolting. The nozzle of the nozzle 210 extends vertically in a long strip shape, and the sprayed insulating adhesive is sprayed out in a linear shape. As the upper positioning mechanism 300 and the lower positioning mechanism 400 clamp the stack 90 and cause the stack 90 to rotate, the insulating adhesive sprayed from the nozzle of the nozzle 210 covers the periphery of the stack 90. ​​The vertical irradiation range A of the lamp head 220 is not less than the height of the accommodating space 500, ensuring that the insulating adhesive in all places can be cured by the light of the lamp head 220, so that the cut edge of each electrode 91 forms a stable insulating adhesive coating, thereby effectively improving the insulation quality of the battery and making the product quality of the battery stable.

[0073] In some embodiments, the insulating adhesive sprayed from the nozzle of the nozzle 210 is UV adhesive; the lamp head 220 may be a UV adhesive curing lamp.

[0074] In some possible embodiments, the spray curing assembly 200 includes a bracket 230 that supports the frame 100 (mentioned below) and the lamp head 220, thereby fixing the lamp head 220, and thus the spray nozzle 210 can be fixed through the lamp head 220.

[0075] In some possible embodiments, the spray curing assembly 200 includes a connecting tube (not shown) and a paint can (not shown); the paint can is used to store insulating adhesive, and the nozzle 210 is connected to the paint can via the connecting tube. An internal or external pumping mechanism allows the insulating adhesive in the paint can be delivered from the connecting tube to the nozzle 210 and sprayed from its nozzle until it coats the periphery of the stack 90.

[0076] In some possible embodiments, referring to Figures 2 to 5, the spraying apparatus includes two spray curing components 200, which are respectively arranged on opposite sides of the receiving space 500.

[0077] Projected vertically, the two spray curing components 200 are respectively arranged on opposite sides of the upper positioning mechanism 300; thus facilitating the spray curing components 200 to uniformly spray insulating adhesive onto the periphery of the stack 90 and complete the curing.

[0078] In some possible embodiments, referring to Figures 1 to 5, the spraying apparatus includes a frame 100. An upper positioning mechanism 300 is fixed to the top of the frame 100; a lower positioning mechanism 400 is fixed to the bottom of the frame 100; a spray curing assembly 200 is fixedly connected to the frame 100; the lower positioning mechanism 400, the receiving space 500, and the upper positioning mechanism 300 are coaxially arranged, and the spray curing assembly 200 is located outside the range of the receiving space 500.

[0079] The frame 100 is a fixed structure, typically made of stainless steel or aluminum alloy to form a fixed shell, or it can be two fixed plates distributed at the top and bottom. The upper positioning mechanism 300 is fixed to the fixed plate at the top of the frame 100; the lower positioning mechanism 400 is fixed to the bottom of the frame 100. The lower positioning mechanism 400, the receiving space 500, and the upper positioning mechanism 300 are coaxially arranged, so that the three are roughly on the same vertical rotation axis, thereby avoiding misalignment. Specifically, the lower positioning mechanism 400, the stacked body 90 in the receiving space 500, and the upper positioning mechanism 300 can all rotate around the rotation axis 93, thereby preventing the stacked body 90 from flying off during rotation. The spraying and curing assembly 200 is located outside the receiving space 500, which facilitates the spraying and curing assembly 200 to uniformly spray insulating adhesive on the periphery of the stacked body 90 and complete the curing. This effectively reduces the overlap of the cut edges of adjacent electrode sheets 91, thereby effectively improving the insulation quality of the battery and ensuring stable product quality.

[0080] In some possible embodiments, as shown in Figures 1 and 2, the upper positioning mechanism 300 can move closer to or further away from the lower positioning mechanism 400 in the vertical direction Z.

[0081] The upper positioning mechanism 300 can move closer to or further away from the lower positioning mechanism 400 along the vertical direction Z. This allows the upper positioning mechanism 300 to move closer to the lower positioning mechanism 400 along the vertical direction Z, thereby pressing the upper positioning mechanism 300 and the lower positioning mechanism 400 onto the two ends of the stack 90 along the vertical direction Z, keeping them fixed. This allows the stack 90 to rotate, facilitating the spraying and curing assembly 200 to uniformly spray insulating adhesive onto the periphery of the stack 90 and complete the curing process. Once the insulating adhesive has cured, the upper positioning mechanism 300 moves further away from the lower positioning mechanism 400 along the vertical direction Z, separating the upper positioning mechanism 300 from the stack 90. ​​This increases the vertical length Z of the accommodating space 500, making it easier to insert or remove the electrode 91 and the separator 92 from the stack 90.

[0082] In some possible embodiments, referring to Figures 1 to 5, the upper positioning mechanism 300 and the lower positioning mechanism 400 are rotatably connected to opposite sides of the frame 100, respectively. Specifically, the lower positioning mechanism 400 is rotatably connected to the bottom side plate of the frame 100; the upper positioning mechanism 300 is rotatably connected to the top side plate of the frame 100; this facilitates the rotation of the stack 90, thereby facilitating the spraying and curing assembly 200 to uniformly spray insulating adhesive onto the periphery of the stack 90 and complete the curing process.

[0083] In some possible embodiments, as shown in Figures 1 to 5, the upper positioning mechanism 300 includes a first turntable 310, a telescopic member 320, and a fixed base 330. The two ends of the telescopic member 320 are respectively connected to the fixed base 330 and the first turntable 310. The first turntable 310 is used to press the top of the stack 90, and the fixed base 330 is fixedly connected to the frame 100.

[0084] The telescopic device 320 can drive the first turntable 310 downward or upward in the vertical direction Z. When the telescopic device 320 drives the first turntable 310 downward in the vertical direction Z, the first turntable 310 presses against the top of the stack 90, thereby keeping the first turntable 310 of the upper mechanism 300 fixed to the stack 90, causing the stack 90 to rotate, and the spray curing component 200 uniformly sprays insulating adhesive on the periphery of the stack 90 and completes curing; when the telescopic device 320 drives the first turntable 310 upward in the vertical direction Z, the first turntable 310 separates from the stack 90, making it easy to put in or take out the electrode 91 and the separator 92 of the stack 90.

[0085] In some possible embodiments, the telescopic member 320 may be a cylinder or a hydraulic cylinder, or it may be a direct-acting motor, which is not limited in this application.

[0086] Taking the telescopic connector 320 as an example, the cylinder body 322 of the telescopic connector 320 is detachably connected to the fixed base 330. Specifically, the cylinder body 322 and the fixed base 330 can be connected by bolts for easy disassembly and maintenance. The piston rod 321 of the telescopic connector 320 is rotatably connected to the first turntable 310. Typically, a first bearing 340 can be installed between the piston rod 321 and the first turntable 310 to ensure that during the rotation of the stack 90, the first turntable 310 rotates together with the stack 90 without affecting the telescopic connector 320. This facilitates the spraying and curing assembly 200 to uniformly spray insulating adhesive onto the periphery of the stack 90 and complete the curing process.

[0087] In some embodiments, the first turntable 310 may be made of stainless steel, aluminum alloy, or iron alloy; its overall shape is circular, rectangular, or square. The fixing base 330 may be made of stainless steel, aluminum alloy, or iron alloy, and its overall shape is disc-shaped or block-shaped; the fixing base 330 is bolted or welded to the frame 100, providing good connection strength.

[0088] In some possible embodiments, referring to Figures 1 to 5, the lower positioning mechanism 400 includes a second turntable 410, a driver 420, and a support column 430; the second turntable 410 is used to support the bottom end of the stack 90; the bottom end of the support column 430 is rotatably connected to the frame 100; the top end of the support column 430 is supported below the second turntable 410, and the driver 420 is used to drive the support column 430 to rotate.

[0089] The support column 430 is supported between the second turntable 410 and the bottom side plate of the frame 100; the driver 420 drives the support column 430 to rotate, which in turn drives the second turntable 410 to rotate. This causes the stack 90 located on the second turntable 410 to rotate, which facilitates the spraying and curing assembly 200 to uniformly spray insulating adhesive on the periphery of the stack 90 and complete the curing. This can effectively reduce the overlap of the cut edges of adjacent electrode sheets 91, thereby effectively improving the insulation quality of the battery and making the product quality of the battery stable.

[0090] It is understandable that the upper positioning mechanism 300 and the lower positioning mechanism 400 should work together to complete the function of the spraying device. Specifically, the telescopic device 320 drives the first turntable 310 to press down in the vertical direction Z, so that the first turntable 310 and the second turntable 410 are respectively pressed against the two ends of the stacked body 90 in the vertical direction Z, thereby keeping the first turntable 310, the stacked body 90 and the second turntable 410 relatively fixed in the circumferential and axial directions; the driver 420 is activated, and the driver 420 drives the support column 430 to rotate, which in turn drives the second turntable 410 to rotate. Thus, the stacked body 90 located on the second turntable 410 rotates accordingly, and the first turntable 310, as the driven turntable, also rotates accordingly. During the overall rotation of the stacked body 90, the spraying and curing component 200 can easily spray insulating glue uniformly on the periphery of the stacked body 90 and complete the curing; this can effectively reduce the overlap of the cut edges of adjacent electrode sheets 91, thereby effectively improving the insulation quality of the battery and making the product quality of the battery stable.

[0091] In some possible embodiments, referring to Figures 1 to 5, the driver 420 is a motor, which is fixed to the frame 100. The bottom end of the support column 430 is rotatably connected to the bottom side plate of the frame 100. Typically, a second bearing 440 can be provided between the support column 430 and the frame 100 to ensure smooth rotation and low friction. A transmission gear 431 is fixed to the outer periphery of the support column 430, and an output gear 423 that meshes with the transmission gear is provided at the end of the shaft 421 of the driver 420.

[0092] Thus, the shaft 421 of the driver 420 rotates, driving the output gear 423 to rotate, and the transmission gear 431 rotates accordingly, ultimately driving the support column 430 to rotate around the rotation axis 93. The second turntable 410, which is fixedly connected to the support column 430, then rotates. This causes the stack 90 located on the second turntable 410 to rotate, and the first turntable 310 also rotates accordingly. The entire stack 90 rotates, facilitating the spraying and curing assembly 200 to uniformly spray insulating adhesive onto the periphery of the stack 90 and complete the curing process. This effectively reduces the overlap of the cut edges of adjacent electrode sheets 91, thereby effectively improving the insulation quality of the battery and ensuring stable product quality.

[0093] In some embodiments, the second turntable 410 may be made of stainless steel, aluminum alloy, or ferroalloy; its overall shape is circular, rectangular, or square. The support column 430 may be made of stainless steel, aluminum alloy, or ferroalloy; its overall shape is cylindrical. The transmission gear 431 may be integrally formed with the support column 430, or it may be separately processed and circumferentially fixed by welding, pins, or other methods. The second turntable 410 and the support column 430 may be fixed by welding or bolts, which has good connection strength.

[0094] In some possible embodiments, referring to Figures 1 to 5, the projected area of ​​the first turntable 310 completely covers the stack 90 when projected vertically in the Z direction. Thus, the uppermost electrode 91 of the stack 90 can be completely covered by the first turntable 310, avoiding exposure. This ensures that the coating and curing assembly 200 only sprays insulating adhesive onto the cut edges around the electrode 91, avoiding coating the surface of the electrode 91 with insulating adhesive, thus ensuring stable battery quality.

[0095] Similarly, when projected vertically, the projected area of ​​the second turntable 410 completely covers the stack 90. ​​Its function and principle are similar to those of the first turntable 310 covering the stack 90, and will not be repeated here.

[0096] It should be noted that both the first turntable 410 and the second turntable 410 are recommended to adopt a shape similar to that of the stack 90. ​​For example, for a square stack 90 formed by stacking square electrode plates 91 and spacer plates 92, both the first turntable 410 and the second turntable 410 can be square disks of the same size or slightly larger than the electrode plates 91. If the stack 90 is cylindrical, then both the first turntable 410 and the second turntable 410 can be circular disks of the same size or slightly larger than the electrode plates 91. For a square stack 90, both the first turntable 410 and the second turntable 410 can also be large circular disks; and for a cylindrical stack 90, both the first turntable 410 and the second turntable 410 can also be large square disks, as long as the projected area of ​​the first turntable 310 completely covers the stack 90 and the projected area of ​​the second turntable 410 completely covers the stack 90. ​​This application embodiment does not impose any restrictions on this.

[0097] In some possible embodiments, referring to Figures 3 to 5, the spraying apparatus includes a conveying mechanism 600, a transfer mechanism 700, and a carrier tray 800; the conveying mechanism 600 is arranged on one side of the receiving space 500 for conveying the electrode 91; the carrier tray 800 is arranged on the other side of the receiving space 500 for carrying the separator 92; the transfer mechanism 700 is capable of transferring the electrode 91 from the conveying mechanism 600 to the receiving space 500 and transferring the separator 92 from the carrier tray 800 to the receiving space 500.

[0098] The conveying mechanism 600 can be a conveyor belt for conveying the pre-cut electrode sheets 91. The carrier tray 800 is a desktop platform, which can be made of stainless steel, aluminum alloy, or plastic; the carrier tray 800 may have corresponding grooves for stacking the separator sheets 92. The conveying mechanism 600 and the carrier tray 800 are arranged on opposite sides of the receiving space 500 to avoid interference between their loading and unloading. The transfer mechanism 700 can transfer the electrode sheets 91 from the conveying mechanism 600 to the receiving space 500, and transfer the separator sheets 92 from the carrier tray 800 to the receiving space 500.

[0099] The conveying mechanism 600, the transfer mechanism 700, the carrier plate 800, the upper positioning mechanism 300, and the lower positioning mechanism 400 shall work together to complete the function of the spraying device.

[0100] For example, the specific working process is as follows: The telescopic device 320 drives the first turntable 310 to rise in the vertical direction Z, and the upper positioning mechanism 300 moves away from the lower positioning mechanism 400 in the vertical direction Z, thereby making the distance in the vertical direction Z of the accommodating space 500 larger. The transfer mechanism 700 sequentially transfers the electrode 91 on the stack 90 that has been sprayed with insulating glue in the accommodating space 500 back to the next process, and transfers the isolation sheet 92 on the stack 90 back to the carrier tray 800. Then, the transfer mechanism 700 sequentially stacks the electrode 91 to be sprayed with insulating glue on the conveying mechanism 600 and the isolation sheet 92 on the carrier tray 800 alternately in the accommodating space 500, and finally forms a stack 90 with a certain thickness. The telescopic device 320 drives the first turntable 310 to press down in the vertical direction Z, so that the first Turntable 310 and second turntable 410 are respectively pressed onto both ends of the stacked body 90 along the vertical direction Z, so that the first turntable 310, the stacked body 90 and the second turntable 410 can maintain relative fixation in the circumferential and axial directions. The driver 420 is activated, and the driver 420 drives the support column 430 to rotate, which in turn drives the second turntable 410 to rotate. Thus, the stacked body 90 located on the second turntable 410 rotates accordingly, and the first turntable 310, as a driven turntable, also rotates accordingly. During the overall rotation of the stacked body 90, the spray curing component 200 can easily spray insulating adhesive uniformly on the periphery of the stacked body 90 and complete the curing. This can effectively reduce the overlap of the cut edges of adjacent electrode sheets 91, thereby effectively improving the insulation quality of the battery and making the product quality of the battery stable.

[0101] In some possible embodiments, referring to Figures 3 to 5, the transfer mechanism 700 includes two sets of robotic arms 710 and a guide rail 720; the guide rail 720 is mounted above the transfer mechanism 600 and the carrier plate 800; one set of robotic arms 710 is slidably disposed on the guide rail 720 and is used to transfer the electrode 91 from the transfer mechanism 600 to the receiving space 500; the other set of robotic arms 710 is slidably disposed on the guide rail 720 and is used to transfer the separator 92 from the carrier plate 800 to the receiving space 500.

[0102] Thus, two sets of robotic arms 710 slide on the guide rail 720 respectively. One set of robotic arms 710 is used to transfer the electrode 91 from the transfer mechanism 600 to the receiving space 500; the other set of robotic arms 710 is used to transfer the separator 92 from the carrier plate 800 to the receiving space 500. They do not interfere with each other, have high transfer efficiency, and can improve the overall production efficiency of the spraying device.

[0103] In some possible embodiments, as shown in Figures 3 to 5, the robotic arm 710 includes a link 711, a negative pressure suction cup 712, a lifting part 713, and a drive part 714; one end of the link 711 is movably mounted on the guide rail 720, and the drive part 714 is connected to the link 711 in a transmission manner; the lifting part 713 is connected between the other end of the link 711 and the negative pressure suction cup 712.

[0104] One end of the connecting rod 711 is movably mounted on the guide rail 720. The drive unit 714 is connected to the connecting rod 711 and can be a motor. Thus, with one end of the connecting rod 711 movably mounted on the guide rail 720, horizontal reciprocating motion can be achieved through the drive unit 714, facilitating the movement of the connecting rod 711 to different positions such as the conveying mechanism 600, the carrier plate 800, and the accommodating space 500. The negative pressure suction cup 712 has multiple suction holes on its surface and is connected to external negative pressure equipment (such as a vacuum pump). Lifting... Part 713 can be a cylinder or a motor. The lifting part 713 is connected between the connecting rod 711 and the negative pressure suction cup 712, so that the negative pressure suction cup 712 can move up and down relative to the connecting rod 711 in the vertical direction Z. This makes it convenient for the negative pressure suction cup 712 to fall to the height of the conveying mechanism 600, the carrier plate 800 or the accommodating space 500. Then, the negative pressure suction cup 712 can better adsorb the electrode 91 and the isolation plate 92 through the negative pressure adsorption hole to realize the picking and placing function. In this way, the loading and unloading functions in the spraying device can be completed by the transfer of the robotic arm 710.

[0105] A second aspect of this application provides a battery production line, including the above-described coating apparatus.

[0106] A third aspect of this application provides a battery production line, as shown in FIG5. The battery production line includes an unwinding mechanism 910, a plurality of rotary drums 920, a pressure roller pair 930, a cutter 940, and the aforementioned spraying device. All the rotary drums 920 are spaced apart between the unwinding mechanism 910 and the feed side of the pressure roller pair 930. A conveying mechanism 600 is connected to the discharge side of the pressure roller pair 930. The cutter 940 is disposed between the pressure roller pair 930 and the conveying mechanism 600.

[0107] The unwinding mechanism 910 may include a roll (not shown) and a drive motor (not shown), and the pressure rollers 930 may include a driven roller 931 and a drive roller 932, with their roller surfaces close to each other and only a small gap for the electrode sheet to pass through.

[0108] The operator loads a continuous roll of electrode sheets into the unwinding mechanism 910; the drive motor drives the roll to rotate, which in turn causes the unwinding mechanism 910 to release the material; the material strip 911 released from the unwinding mechanism 910 passes through multiple rotating drums 920 in sequence to complete the traction and tension, and the material strip 911 then enters the feed side of the pressure roller 930. The material strip 911 flowing out from the discharge side of the pressure roller 930 is cut to size by the cutter 940 to obtain the electrode sheet 91. The cut electrode sheet 91 then falls onto the conveyor mechanism 600 and is moved by the conveyor belt to a preset position, facilitating the transfer of the electrode sheet 91 from the conveyor mechanism 600 to the receiving space 500 by the robotic arm 710 of the transfer mechanism 700. The robotic arm 710 of the transfer mechanism 700 alternately stacks the electrode sheet 91 to be coated with insulating adhesive on the conveyor mechanism 600 and the isolation sheet 92 on the carrier tray 800 in the receiving space 500, ultimately forming a stacked body 90 with a certain thickness. The telescopic device 320 drives the first turntable 310 downward along the vertical direction Z, so that the first turntable 310 and the second turntable 410 are respectively pressed against the two ends of the stacked body 90 along the vertical direction Z, thereby enabling... The first turntable 310, the stack 90, and the second turntable 410 remain relatively fixed in the circumferential and axial directions. The driver 420 is activated, which drives the support column 430 to rotate, thereby causing the second turntable 410 to rotate. As a result, the stack 90 located on the second turntable 410 rotates accordingly, and the first turntable 310, as a driven turntable, also rotates accordingly. During the overall rotation of the stack 90, the spray curing component 200 can easily spray insulating adhesive uniformly onto the periphery of the stack 90 and complete the curing process. This can effectively reduce the overlap of the cut edges of adjacent electrode sheets 91, thereby effectively improving the insulation quality of the battery and ensuring stable product quality.

[0109] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A spraying device for spraying a stack (90) of pole pieces (91) and separator sheets (92), wherein The spraying device comprises: an upper positioning mechanism (300); a lower positioning mechanism (400) arranged opposite to the upper positioning mechanism (300) in a vertical direction, and a containing space (500) for containing the stack (90) is formed between the upper positioning mechanism (300) and the lower positioning mechanism (400), and the upper positioning mechanism (300) and the lower positioning mechanism (400) are configured to clamp the stack (90) and drive the stack (90) to rotate; and at least one spraying and curing assembly (200) capable of spraying and curing the periphery of the stack (90) arranged in the containing space (500).

2. The spray device of claim 1, wherein, The spraying and curing assembly (200) comprises a spray head (210) and a lamp head (220), and the spray port of the spray head (210) extends in the vertical direction; the lamp head (220) is fixed on the side of the spray head (210), and the range of the lamp head (220) irradiated in the vertical direction is not less than the height of the containing space (500).

3. The spray device of claim 2, wherein, The lamp head (220) is a UV glue curing lamp.

4. The spray device of any one of claims 1 to 3, wherein, The spraying device comprises two spraying and curing assemblies (200), and the two spraying and curing assemblies (200) are arranged on opposite sides of the containing space (500), respectively.

5. The spray device of any one of claims 1 to 4, wherein, The spraying device comprises a rack (100); the upper positioning mechanism (300) is fixed at the top end of the rack (100), the lower positioning mechanism (400) is fixed at the bottom end of the rack (100), and the spraying and curing assembly (200) is fixedly connected with the rack (100); the lower positioning mechanism (400), the containing space (500) and the upper positioning mechanism (300) are coaxially arranged, and the spraying and curing assembly (200) is located outside the range of the containing space (500).

6. The spray device of claim 5, wherein, The upper positioning mechanism (300) comprises a first turntable (310), a telescopic device (320) and a fixed seat (330), and the two ends of the telescopic device (320) are connected with the fixed seat (330) and the first turntable (310), respectively; the first turntable (310) is used for pressing the top end of the stack (90), and the fixed seat (330) is fixedly connected with the rack (100).

7. The spray device of claim 6, wherein, The telescopic device (320) is a pneumatic cylinder, the cylinder body (322) of the telescopic device (320) is detachably connected with the fixed seat (330), and the piston rod (321) of the telescopic device (320) is rotationally connected with the first turntable (310).

8. The spray device of claim 6, wherein, The lower positioning mechanism (400) comprises a second turntable (410), a driver (420) and a support column (430); the second turntable (410) is used for supporting the bottom end of the stack (90); the bottom end of the support column (430) is rotationally connected with the rack (100); the top end of the support column (430) is supported below the second turntable (410), and the driver (420) is used for driving the support column (430) to rotate.

9. The spray device of claim 8, wherein, The driver (420) is an electric motor, the driver (420) is fixed with the rack (100), the outer circumferential side of the support column (430) is fixed with a transmission gear, and the end of the rotating shaft (421) of the driver (420) is provided with an output gear meshing with the transmission gear.

10. The spray device of claim 8, wherein, The first rotating disc (310) completely covers the stack (90) in the projection area in the vertical direction; and / or The second rotating disc (410) completely covers the stack (90) in the projection area in the vertical direction.

11. The spray device of any one of claims 1 to 4, wherein, The spraying device comprises a conveying mechanism (600), a transfer mechanism (700), and a carrier disc (800); The conveying mechanism (600) is arranged on one side of the containing space (500) and is used for conveying the pole piece (91); The carrier disc (800) is arranged on the other side of the containing space (500) and is used for carrying the isolation sheet (92); The transfer mechanism (700) can transfer the pole piece (91) from the conveying mechanism (600) to the containing space (500) and transfer the isolation sheet (92) from the carrier disc (800) to the containing space (500). The transfer mechanism (700) comprises two groups of mechanical arms (710) and a guide rail (720); 12. The spray device of claim 11, wherein, The guide rail (720) is arranged above the conveying mechanism (600) and the carrier disc (800); One group of the mechanical arms (710) is slidingly arranged on the guide rail (720) and is used for transferring the pole piece (91) from the conveying mechanism (600) to the containing space (500); The other group of the mechanical arms (710) is slidingly arranged on the guide rail (720) and is used for transferring the isolation sheet (92) from the carrier disc (800) to the containing space (500). The mechanical arm (710) comprises a connecting rod (711), a negative pressure suction disc (712), a lifting part (713), and a driving part (714); 13. The spray device of claim 12, wherein, One end of the connecting rod (711) is movably arranged on the guide rail (720), and the driving part (714) is in transmission connection with the connecting rod (711); The lifting part (713) is connected between the other end of the connecting rod (711) and the negative pressure suction disc (712). The spraying device comprises the spraying device according to any one of claims 1 to 13.

14. A battery production line, wherein, The spraying device comprises a winding-off mechanism (910), a plurality of rotating cylinders (920), a pressing pair of rollers (930), a cutter (940), and the spraying device according to any one of claims 11 to 13; 15. A battery production line, wherein, All the rotating cylinders (920) are arranged between the winding-off mechanism (910) and the feeding side of the pressing pair of rollers (930), the conveying mechanism (600) is connected with the discharging side of the pressing pair of rollers (930), and the cutter (940) is arranged between the pressing pair of rollers (930) and the conveying mechanism (600). ​

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