Coating device and battery production line

Abstract

The utility model discloses a coating device and a battery production line, and the coating device comprises an unwinding mechanism which is configured to release a diaphragm to be coated; the spraying mechanism is arranged on the downstream of the unwinding mechanism, and the spraying mechanism comprises an electrostatic spraying gun, a first air knife and a positive charge generator; the electrostatic spray gun and the first air knife are positioned on two opposite sides of the diaphragm; the positive charge generator is arranged on the first air knife; the drying oven is arranged at the downstream of the spraying mechanism; and the baffle is arranged at an inlet of the drying oven. According to the technical scheme of the embodiment of the invention, essentially, the coating particles are attracted to the surface of the diaphragm under the action of the electric field force to realize coating, so that the situation that water mist splashes into the drying oven in the spraying process is effectively reduced, and the humidity of the drying oven is prevented from being influenced; after the diaphragm enters the drying oven, due to the fact that the drying oven is dry and no water mist exists in the drying oven, the drying effect of the diaphragm can be improved, and water spots are prevented from remaining after the diaphragm is dried.

Description

Technical Field

[0001] The present application relates to the field of coating technology, and in particular to a coating device and a battery production line. Background Art

[0002] In the production process of lithium batteries, the coated isolation film needs to be baked using baking equipment.

[0003] The isolation film in the related art has a poor drying effect after passing through the baking equipment. Utility Model Content

[0004] In view of the above problems, the present application provides a coating device and a battery production line, which can solve the problem of poor drying effect of the isolation film after passing through a baking device.

[0005] In order to solve the above technical problems, in the first aspect, the present application proposes a coating device, comprising:

[0006] an unwinding mechanism configured to release the membrane to be coated;

[0007] A spraying mechanism is arranged downstream of the unwinding mechanism, and the spraying mechanism comprises an electrostatic spray gun, a first air knife and a positive charge generator; the electrostatic spray gun and the first air knife are located on opposite sides of the diaphragm, and the positive charge generator is arranged on the first air knife;

[0008] an oven, disposed downstream of the spraying mechanism;

[0009] A baffle is arranged at the entrance of the oven and is used to shield a portion of the entrance.

[0010] In the technical solution of the embodiment of the present application, under the interaction between the electrostatic spray gun and the positive charge generator, the paint particles can be attracted to the surface of the diaphragm under the action of the electric field force to achieve coating. Its essence is to use the electric field force to attract the paint particles to the surface of the diaphragm to achieve coating. In this way, the water mist splashing into the oven during the spraying process is effectively reduced, thereby avoiding affecting the humidity of the oven; when the diaphragm enters the oven, since the oven itself is dry, there is no water mist in the oven, thereby improving the drying effect of the diaphragm and avoiding residual water stains on the diaphragm after drying. At the same time, the baffle can effectively prevent the water mist from entering the oven during the spraying process.

[0011] In some embodiments, the coating device further comprises a first adjustment mechanism, which is connected to the first air knife and is used to adjust the angle of the first air knife relative to the diaphragm. In this way, it is convenient to adjust the angle of the first air knife relative to the diaphragm. Since the positive charge generator is arranged on the first air knife, after adjusting the angle of the first air knife, a large amount of positive charges generated by the positive charge generator can be blown toward the diaphragm.

[0012] In some embodiments, the coating device further includes a second adjustment mechanism, which is connected to the baffle and is used to adjust the position of the baffle relative to the inlet.

[0013] In this way, the size of the oven inlet can be controlled by adjusting the position of the baffle relative to the inlet through the second adjustment mechanism. When the oven inlet is smaller, it is more difficult for external water mist to enter the oven, but this will affect the control of the oven temperature. By controlling the position relationship between the baffle and the inlet, a balance can be achieved between water mist blocking and the temperature inside the oven.

[0014] In some embodiments, the coating device further comprises a second air knife, and the second air knife is arranged between the spraying mechanism and the oven. In this way, the water stains on the diaphragm can be dried by blowing the second air knife toward the diaphragm.

[0015] In some embodiments, the coating device further comprises a third adjustment mechanism, which is connected to the second air knife and is used to adjust the angle of the second air knife relative to the diaphragm. In this way, it is convenient to adjust the angle of the second air knife relative to the diaphragm so that the wind blown by the second air knife is directed toward the diaphragm.

[0016] In some embodiments, the coating device further comprises an air velocity flow meter, and the air velocity flow meter is arranged on the second air knife. In this way, the air velocity of the second air knife is measured by the air velocity flow meter, so that the air velocity of the second air knife can be controlled according to different membrane requirements.

[0017] In some embodiments, the coating device further comprises a third air knife, and the third air knife is arranged downstream of the oven, so that the dried diaphragm can be blown dry again.

[0018] In some embodiments, the coating device further comprises a roll-changing mechanism, which is arranged on the unwinding mechanism. Thus, when the membrane on the unwinding roller on the unwinding mechanism is completely released, the roll-changing mechanism can be used to place another unwinding roller to a specified position, so that the whole device can work uninterruptedly.

[0019] In some embodiments, the roll changing mechanism is an automatic roll changing mechanism, so that it is convenient to replace the unwinding roller on the unwinding mechanism.

[0020] In some embodiments, the coating device further includes a deviation correction mechanism; the deviation correction mechanism is arranged downstream of the unwinding mechanism.

[0021] In a second aspect, the present application proposes a battery production line, comprising a coating device as described in any one of the embodiments of the present application.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0025] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0026] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0027] Figure 4 A schematic diagram of the structure of a coating device provided in some embodiments of the present application.

[0028] The reference numerals in the specific implementation manner are as follows:

[0029] 1000. Vehicles;

[0030] 100, battery; 200, controller; 300, motor;

[0031] 110, box body; 111, first part; 112, second part; 120, battery cell; 121, shell; 122, end cover; 123, electrode assembly;

[0032] 10. Diaphragm; 11. Unwinding mechanism; 12. Roller; 13. Spraying mechanism; 131. Electrostatic spray gun; 132. First air knife; 14. Oven; 15. Second air knife; 16. Baffle. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this 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.

[0035] 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.

[0036] Reference to "embodiments" herein 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 herein may be combined with other embodiments.

[0037] 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.

[0038] 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).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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.

[0040] 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 those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0042] Coating is to apply a thin layer of coating material in liquid or powder form on the surface of fabrics, paper, metal foil or plates. In order to improve the electrical performance of lithium-ion batteries, coating is an indispensable step in the production process of battery cells and a key process that directly affects battery capacity, life and other performance.

[0043] In the related art, when spraying polyvinylidene fluoride (PVDF), water mist will enter the oven and affect the humidity in the oven. When the sprayed isolation film enters the oven, the water stains in the oven will remain on the isolation film, thereby affecting the drying effect of the isolation film.

[0044] Based on the above considerations, in order to solve the problem of poor drying effect of the isolation film after passing through the baking equipment, a coating device is designed, which includes a unwinding mechanism, a spraying mechanism, an oven and a baffle, wherein the unwinding mechanism is used to release the isolation film to be coated; the spraying mechanism is arranged downstream of the unwinding mechanism, and the spraying mechanism includes an electrostatic spray gun, a first air knife and a positive charge generator; the electrostatic spray gun and the first air knife are located on opposite sides of the isolation film, and the positive charge generator is arranged on the first air knife; the oven is arranged downstream of the spraying mechanism; the baffle is arranged at the entrance of the oven to block part of the entrance.

[0045] When in use, the interaction between the electrostatic spray gun and the positive charge generator can make the paint particles attracted to the surface of the diaphragm under the action of the electric field force to achieve coating. Its essence is to use the electric field force to attract the paint particles to the surface of the diaphragm to achieve coating. In this way, the water mist splashing into the oven during the spraying process is effectively reduced, thereby avoiding affecting the humidity of the oven; when the diaphragm enters the oven, since the oven itself is dry, there is no water mist in the oven, thereby improving the drying effect of the diaphragm and avoiding residual water stains on the diaphragm after drying. At the same time, the baffle can effectively prevent water mist from entering the oven during the spraying process.

[0046] The coating device disclosed in the embodiment of the present application can be used, but is not limited to, in the production of battery separators. It should be noted that the battery in the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery pack, etc. The battery can be used as a power source or power system for an electrical device, which is conducive to improving the overall performance of the battery and facilitating the promotion of the battery.

[0047] The above-mentioned electrical devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0048] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0049] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0050] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0051] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box body 110 and a battery cell 120, and the battery cell 120 is contained in the box body 110. Among them, the box body 110 is used to provide a storage space for the battery cell 120, and the box body 110 can adopt a variety of structures. In some embodiments, the box body 110 may include a first part 111 and a second part 112, and the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell 120. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0052] In the battery 100, there may be multiple battery cells 120, and the multiple battery cells 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 120 are both connected in series and in parallel. The multiple battery cells 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 120 is accommodated in the box 110; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 120 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 110. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 120.

[0053] Each battery cell 120 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 120 may be cylindrical, flat, rectangular, or in other shapes.

[0054] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123 and an electrode terminal. The housing includes a shell 121 and an end cap 122. The shell 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0055] The shell 121 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the electrode assembly 123, the electrolyte and other components. The shell 121 and the end cap 122 can be independent components. The shell 121 can be of various shapes and sizes. Specifically, the shape of the shell 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0056] The end cap 122 refers to a component that covers the opening of the shell 121 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 121 to match the shell 121. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when squeezed and collided, so that the battery cell 120 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the end cap 122. The electrode terminal can be used to electrically connect to the electrode assembly 123 for outputting or inputting electrical energy of the battery cell 120. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 122, and the insulating structure may be used to isolate the electrical connection components in the housing 121 from the end cap 122 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0057] The electrode assembly 123 is a component in the battery cell 120 where an electrochemical reaction occurs. One or more electrode assemblies 123 may be included in the housing 121. The electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 123, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear may be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal to form a current loop. In addition, the electrode assembly 123 may be a winding structure or a laminated structure.

[0058] In some embodiments, the battery cell 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold value.

[0059] According to some embodiments of the present application, Figure 4 Schematic diagram of the coating device in this application. Figure 4 As shown, the present application provides a coating device, which includes a reeling mechanism 11, a spraying mechanism 13, an oven 14 and a baffle 16, wherein the reeling mechanism 11 is used to release the diaphragm 10 to be coated; the spraying mechanism 13 is arranged downstream of the reeling mechanism 11, and the spraying mechanism 13 includes an electrostatic spray gun 131, a first air knife 132 and a positive charge generator, wherein the electrostatic spray gun 131 and the first air knife 132 are located on opposite sides of the diaphragm 10, and the positive charge generator is arranged on the first air knife 132; the oven 14 is arranged downstream of the spraying mechanism 13, and the baffle 16 is arranged at the entrance of the oven 14 for shielding part of the entrance.

[0060] refer to Figure 4 As shown, the coating device in this embodiment further includes a roller 12 and a frame, wherein the roller 12 is located downstream of the unwinding mechanism 11 and is rotatably connected to the frame. The spraying mechanism 13 may be located around the roller 12 or at other locations.

[0061] The unwinding mechanism 11 in this embodiment may include an unwinding roller and a motor. The two ends of the unwinding roller are connected to the frame through a rotating shaft. The motor is fixed to the frame, and the output shaft of the motor is connected to the rotating shaft on the unwinding roller. The unwinding roller can release the diaphragm 10 by driving the rotating shaft to rotate by the motor. Of course, it can be understood that the unwinding mechanism 11 in this embodiment can also be other structures, for example: the unwinding mechanism 11 includes an unwinding roller, a transmission gear and a motor, and the specific structure can be determined according to actual conditions, and the embodiments of this specification are not limited to this.

[0062] The oven 14 in this embodiment can be a convection drying oven, an infrared drying oven, a magnetic induction heating oven, etc. The specific one can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0063] The structures of the electrostatic spray gun 131, the first air knife 132 and the positive charge generator in this embodiment can refer to the existing electrostatic spray guns, air knives and positive charge generators, and will not be repeated here.

[0064] When the electrostatic spray gun 131 in this embodiment is in use, the grounded object to be coated is used as the positive electrode, the paint atomizing device is used as the negative electrode, and the paint atomizing device is charged with a high negative voltage to form an electrostatic field between the two electrodes, so that the atomized paint particles are negatively charged, so that the paint is effectively adsorbed on the surface of the object to be coated at the opposite electrode.

[0065] The positive charge generator in this embodiment can be fixed to the first wind knife 132 by bolts. The specific amount can be determined according to actual conditions, and this specification embodiment does not limit this.

[0066] refer to Figure 4 As shown, the atomized paint particles produced by the electrostatic spray gun 131 are negatively charged. The atomized paint is located on one side of the diaphragm 10. The positive ions generated by the positive charge generator are blown to the other side of the diaphragm 10 under the action of the first wind knife 132, so that the paint particles can be attracted to the surface of the diaphragm 10 under the action of the electric field force to achieve coating.

[0067] It should be noted that the structure of the above-mentioned spraying mechanism is only an example. In other alternative solutions, other structures may also be adopted. For example, the spraying mechanism also includes an adjustment member, and the angle of the positive charge generator is adjusted by the adjustment member. The present application does not impose any special restrictions on the specific structure of the spraying mechanism, as long as the above-mentioned structure can achieve the purpose of the present application.

[0068] The baffle 16 in this embodiment can be fixed to the oven 14 by bolts, and the baffle 16 blocks part of the entrance of the oven 14, or the baffle 16 is clamped on the oven 14, which can be determined according to actual conditions and is not limited in this embodiment of the present specification.

[0069] In this embodiment, a baffle 16 is provided to block part of the inlet of the oven 14 , so that water mist can be effectively blocked from entering the oven 14 through the inlet of the oven 14 during the spraying process.

[0070] In the technical solution of the embodiment of the present application, under the interaction between the electrostatic spray gun 131 and the positive charge generator, the paint particles can be attracted to the surface of the diaphragm 10 under the action of the electric field force to achieve coating. Its essence is to use the electric field force to attract the paint particles to the surface of the diaphragm 10 to achieve coating. In this way, the water mist splashing into the oven 14 during the spraying process is effectively reduced, thereby avoiding affecting the humidity of the oven 14; when the diaphragm 10 enters the oven 14, since the oven 14 itself is dry, there is no water mist in the oven 14, thereby improving the drying effect of the diaphragm 10 and avoiding residual water stains on the diaphragm 10 after drying. At the same time, the baffle 16 can effectively prevent the water mist from entering the oven 14 during the spraying process.

[0071] According to some embodiments of the present application, the coating device further includes a first adjustment mechanism (not shown in the figure), which is connected to the first air knife 132 and is used to adjust the angle of the first air knife 132 relative to the diaphragm 10 .

[0072] The first adjustment mechanism in this embodiment may include a rotating shaft and a fixing plate, the first wind knife 132 may be fixed to the rotating shaft by bolts, the rotating shaft is welded to the fixing plate, the fixing plate is fixed to the frame by bolts, and by adjusting the position of the fixing plate on the frame, the angle of the first wind knife 132 may be adjusted. Of course, it can be understood that the first adjustment mechanism may also include a stepping motor, the output shaft of the stepping motor is connected to the first wind knife 132, and the specific can be determined according to actual conditions, and the embodiments of this specification are not limited to this.

[0073] In this embodiment, by providing a first adjustment mechanism, the angle of the first wind knife 132 relative to the diaphragm 10 can be easily adjusted. Since the positive charge generator is fixed on the first wind knife 132, after adjusting the angle of the first wind knife 132, a large amount of positive charges generated by the positive charge generator can be blown toward the diaphragm 10.

[0074] According to some embodiments of the present application, the coating device further includes a second adjustment mechanism (not shown in the figure), which is connected to the baffle 16 and is used to adjust the position of the baffle 16 relative to the inlet.

[0075] In this embodiment, the second adjusting mechanism can be an electric telescopic rod, a hydraulic rod, etc. When in use, the second adjusting mechanism is fixed to the frame, and the telescopic end of the second adjusting mechanism is connected to the baffle 16, and the baffle 16 can be driven to move by the second adjusting mechanism.

[0076] In this embodiment, the position of the baffle plate 16 relative to the inlet is adjusted by the second adjustment mechanism, so as to control the size of the inlet of the oven 14. When the inlet of the oven 14 is smaller, it is more difficult for the external water mist to enter the oven 14, but this will affect the control of the temperature of the oven 14. By controlling the position relationship between the baffle plate 16 and the inlet, a balance between the water mist blocking and the temperature inside the oven 14 can be achieved.

[0077] According to some embodiments of the present application, Figure 4 As shown, the coating device further includes a second air knife 15 , which is disposed between the spraying mechanism 13 and the oven 14 .

[0078] The second wind knife 15 in this embodiment can be fixed to the frame by bolts, or the second wind knife 15 can be fixed to the frame by a connecting plate. The specific details can be determined according to actual conditions, and this specification embodiment does not limit this.

[0079] In this embodiment, a second air knife 15 is arranged downstream of the spraying mechanism 13 , so that after spraying is completed, the second air knife 15 can blow toward the diaphragm 10 to dry the water stains on the diaphragm 10 .

[0080] According to some embodiments of the present application, the coating device further includes a third adjustment mechanism (not shown in the figure), which is connected to the second air knife 15 and is used to adjust the angle of the second air knife 15 relative to the diaphragm 10 .

[0081] The structure of the third adjustment mechanism in this embodiment can refer to the structure of the first adjustment mechanism mentioned above, and will not be repeated here.

[0082] In this embodiment, the third adjustment mechanism is provided, so that the angle of the second wind knife 15 relative to the diaphragm 10 can be easily adjusted, so that the wind blown by the second wind knife 15 is directed toward the diaphragm 10 .

[0083] According to some embodiments of the present application, the coating device further includes an air velocity flow meter (not shown in the figure), which is disposed on the second air knife 15 .

[0084] The wind speed flow meter in this embodiment can be fixed to the second wind knife 15 by a buckle, or the wind speed flow meter can be fixed to the second wind knife 15 by a bolt. The specific details can be determined according to actual conditions, and this specification embodiment does not limit this.

[0085] Since the diaphragm 10 is not dried before entering the oven 14 after being sprayed by the spraying mechanism 13, when the wind speed of the second air knife 15 is too high, the paint on the diaphragm 10 will move, which will affect the spraying effect. In this embodiment, an air velocity flow meter is arranged on the second air knife 15, and the wind speed of the second air knife 15 is measured according to the air velocity flow meter. When the wind velocity flow meter measures that the wind speed of the second air knife 15 is greater than the threshold value, the second air knife 15 is regulated so that the wind speed of the second air knife 15 is within the threshold range. In this way, when the second air knife 15 acts on the diaphragm 10 after the paint, it is not only conducive to the air drying of the diaphragm 10, but also can avoid the wind speed being too high, which affects the spraying effect.

[0086] According to some embodiments of the present application, the coating device further includes a third air knife (not marked in the figure), and the third air knife is arranged downstream of the oven 14.

[0087] The third air knife in this embodiment can be fixed to the downstream of the oven 14 by an adjustment mechanism, and the adjustment mechanism can be the structure of the first adjustment mechanism mentioned above, which will not be described here. Alternatively, the third air knife is directly fixed to the frame by bolts, and the specific details can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0088] In this embodiment, a third air knife is arranged downstream of the drying oven 14, so that the dried diaphragm 10 can be further dried.

[0089] According to some embodiments of the present application, the coating device further includes a roll-changing mechanism (not shown in the figure), which is disposed on the unwinding mechanism 11 .

[0090] The structure of the roll changing mechanism in this embodiment can refer to the existing roll changing mechanism, and will not be described in detail here.

[0091] In this embodiment, a roll-changing mechanism is provided. When the diaphragm on the unwinding roller on the unwinding mechanism is completely released, the roll-changing mechanism can be used to place another unwinding roller at a specified position, so that the entire device can work uninterruptedly.

[0092] According to some embodiments of the present application, the roll changing mechanism is an automatic roll changing mechanism (not marked in the figure).

[0093] The automatic roll changing mechanism in this embodiment can refer to the existing automatic roll changing mechanism, which will not be described in detail here.

[0094] This embodiment provides an automatic roll-changing mechanism, thereby facilitating replacement of the unwinding roller on the unwinding mechanism.

[0095] According to some embodiments of the present application, the coating device further includes a deviation correction mechanism (not shown in the figure), which is disposed downstream of the unwinding mechanism 11 .

[0096] A deviation correction mechanism is a device used to adjust and correct objects or materials that deviate from the predetermined path during transportation, processing, etc.

[0097] The deviation correction mechanism in this embodiment is used to correct the diaphragm 10 released by the unwinding mechanism 11 to ensure that the released diaphragm 10 is transported along a predetermined path.

[0098] The correction mechanism in this embodiment can be a gas-liquid correction machine, a servo linear correction machine, etc. The specific correction mechanism can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0099] In this embodiment, a deviation correction mechanism is arranged downstream of the unwinding mechanism 11, so that the error of the diaphragm 10 during the unwinding process can be controlled.

[0100] The present application also provides a battery production line, comprising a coating device as described in any one of the embodiments of the present application.

[0101] The specific structure of the coating device in this embodiment refers to the above embodiment. Since all the technical solutions of all the above embodiments are adopted in the battery production line, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A coating device, characterized in that: include: an unwinding mechanism configured to release the membrane to be coated; A spraying mechanism is arranged downstream of the unwinding mechanism, and the spraying mechanism comprises an electrostatic spray gun, a first air knife and a positive charge generator; the electrostatic spray gun and the first air knife are located on opposite sides of the diaphragm, and the positive charge generator is arranged on the first air knife; An oven is arranged downstream of the spraying mechanism; A baffle is arranged at the entrance of the oven and is used to shield a portion of the entrance.

2. The coating device according to claim 1, characterized in that: The coating device further includes a first adjusting mechanism, which is connected to the first air knife and is used to adjust an angle of the first air knife relative to the diaphragm.

3. The coating device according to claim 1, characterized in that: The coating device further comprises a second adjusting mechanism, which is connected to the baffle and is used to adjust the position of the baffle relative to the inlet.

4. The coating device according to claim 1 or 2, characterized in that: The coating device further comprises a second air knife, and the second air knife is arranged between the spraying mechanism and the oven.

5. The coating device according to claim 4, characterized in that: The coating device further comprises a third adjusting mechanism, which is connected to the second air knife and is used to adjust an angle of the second air knife relative to the diaphragm.

6. The coating device according to claim 4, characterized in that: The coating device further includes an air velocity flow meter, and the air velocity flow meter is arranged on the second air knife.

7. The coating device according to claim 1 or 2, characterized in that: The coating device further includes a third air knife, and the third air knife is arranged downstream of the oven.

8. The coating device according to claim 1 or 2, characterized in that: The coating device further comprises a roll changing mechanism, and the roll changing mechanism is arranged on the unwinding mechanism.

9. The coating device according to claim 8, characterized in that: The roll changing mechanism is an automatic roll changing mechanism.

10. The coating device according to claim 1 or 2, characterized in that: The coating device also includes a deviation correction mechanism; The deviation correcting mechanism is arranged downstream of the unwinding mechanism.

11. A battery production line, characterized in that: Comprising a coating device as described in any one of claims 1 to 10.

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