Coating equipment and coating system

Abstract

The utility model discloses coating equipment and a coating system. The coating equipment comprises a die head, an abutting piece and a temperature control piece, wherein the abutting piece and the die head are arranged at an interval; the temperature control part is used for adjusting the temperature of the abutting part. Wherein a gap between the die head and the abutting piece is used for allowing the current collector to penetrate through, the current collector and the abutting piece move relatively, the abutting piece is used for abutting against the surface of one side of the current collector in the moving process of the current collector, and the die head is used for coating the surface of the side, away from the abutting piece, of the current collector with slurry. Therefore, the temperature control part is used for adjusting the temperature of the abutting part, so that the overheating condition caused by relative movement of the abutting part and the current collector can be relieved through the temperature control part, and the risk that the current collector is damaged due to deformation or wrinkling of the current collector caused by high temperature is reduced; and the risk that the coating thickness consistency becomes poor due to the fact that the distance between the abutting piece and the current collector is affected by overheating deformation of the abutting piece is reduced.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle life, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] During the battery production process, the slurry needs to be sprayed out through the die head and coated on the current collector to form an active material layer. During the coating process, the current collector and the abutment will move relative to each other, causing the temperature of the abutment to rise. If the temperature of the abutment is too high, it will easily damage the current collector and affect the consistency of the coating. Utility Model Content

[0004] The main purpose of this application is to provide a coating device and a coating system, aiming to solve the above-mentioned technical problems existing in the prior art.

[0005] In order to solve the above problems, the present application provides a coating device, which includes a die head, a push-up member and a temperature control unit, wherein the push-up member is spaced apart from the die head; the temperature control unit is used to adjust the temperature of the push-up member; wherein the gap between the die head and the push-up member is used for the current collector to pass through, and the current collector and the push-up member move relative to each other, the push-up member is used to abut against one side surface of the current collector during the movement of the current collector, and the die head is used to apply slurry to the side surface of the current collector away from the push-up member. Thus, the temperature control unit is used to adjust the temperature of the push-up member, so that the temperature control unit can alleviate the overheating of the push-up member and the current collector due to relative movement, reduce the risk of damage to the current collector due to deformation or wrinkling of the current collector due to high temperature, and reduce the risk of poor coating thickness consistency due to deformation of the push-up member due to overheating affecting the distance between the push-up member and the current collector.

[0006] In some embodiments, the abutting member has a hollow structure, which can increase the area of ​​the abutting member exposed to the air, improve the cooling efficiency of the abutting member, and further alleviate the risk of overheating of the abutting member.

[0007] In some embodiments, the abutment is provided with a heat dissipation duct, which extends through opposing surfaces of the abutment along the axial direction of the abutment. The temperature control unit corresponds to at least one end of the heat dissipation duct in the axial direction, and the temperature control unit is used to change the airflow velocity within the heat dissipation duct. Thus, the heat dissipation duct extends through opposing surfaces of the abutment along the axial direction of the abutment, and the temperature control unit corresponds to at least one end of the heat dissipation duct in the axial direction. The temperature control unit can be used to direct airflow within the heat dissipation duct from both ends, thereby improving the cooling efficiency of the abutment by changing the airflow within the heat dissipation duct and further alleviating the risk of overheating of the abutment.

[0008] In some embodiments, the abutment member is provided with a mounting slot that communicates with the heat dissipation duct, and the temperature control unit is mounted within the mounting slot. Thus, mounting the temperature control unit within the mounting slot can reduce the external space occupied by the temperature control unit, thereby improving the space utilization of the abutment member. Furthermore, the connection between the mounting slot and the heat dissipation duct can shorten the distance between the temperature control unit and the heat dissipation duct, making it easier to change the airflow within the heat dissipation duct through the temperature control unit, thereby reducing the risk of overheating of the abutment member.

[0009] In some embodiments, the radial dimension of the mounting slot is larger than the radial dimension of the heat dissipation duct, so that a step is formed at the junction of the mounting slot and the heat dissipation duct, and the temperature control unit is supported on the step. Thus, the temperature control unit is supported on the step, which can improve the stability of the temperature control unit installed in the mounting slot and improve the assembly efficiency of the temperature control unit.

[0010] In some embodiments, there are multiple heat dissipation ducts, which are spaced apart along the radial direction of the abutment. Thus, the temperature control unit can be used to simultaneously change the airflow rate within the multiple heat dissipation ducts, further improving the cooling efficiency of the abutment and mitigating the risk of overheating of the abutment.

[0011] In some embodiments, the abutment is provided with a heat dissipation channel, and the temperature control unit is connected to the heat dissipation channel, so that the temperature control unit and the heat dissipation channel cooperate to form a loop. Thus, the temperature control unit and the heat dissipation channel are connected, so that the temperature control unit and the heat dissipation channel cooperate to form a loop, which facilitates the flow of heat dissipation fluid into or out of the heat dissipation channel through the temperature control unit, thereby cooling the abutment and reducing the risk of overheating of the abutment.

[0012] In some embodiments, there are multiple heat dissipation channels, each spaced apart along the radial direction of the abutment, and each of the multiple heat dissipation channels is connected to a temperature control unit. Thus, the multiple heat dissipation channels, each spaced apart along the radial direction of the abutment, can simultaneously flow heat dissipation fluid into or out of the multiple heat dissipation channels through the temperature control unit, further improving the cooling efficiency of the abutment and mitigating the risk of overheating of the abutment.

[0013] In some embodiments, the abutment is provided with two confluence grooves, one of which simultaneously connects to one end of multiple heat dissipation channels, and the other connects to the other end of multiple heat dissipation channels. The temperature control unit is connected to both confluence grooves, so that the temperature control unit and the heat dissipation channels cooperate to form a loop. Thus, by providing two confluence grooves, the two confluence grooves can be connected to multiple heat dissipation channels. The temperature control unit only needs to be connected to the two confluence grooves to form a loop with the multiple heat dissipation channels, thereby reducing the complexity of the loop formed by the temperature control unit and the multiple heat dissipation channels and improving the cooling efficiency of the abutment.

[0014] In some embodiments, the abutment member includes a plurality of heat dissipation fins and a main body. The main body is configured to abut against a side surface of the current collector during movement, and the plurality of heat dissipation fins are spaced apart on the main body. Thus, the heat dissipation fins are spaced apart on the main body, and the cooling area of ​​the main body can be increased by the plurality of heat dissipation fins, thereby improving the cooling efficiency of the main body and further alleviating the risk of overheating of the main body.

[0015] In some embodiments, the contact surface between the abutting member and the current collector is arc-shaped. Thus, the contact surface between the abutting member and the current collector is arc-shaped, which can reduce the contact area between the abutting member and the current collector, thereby reducing the heat generated by the relative movement between the current collector and the abutting member.

[0016] In some embodiments, the central angle between the contact surface of the abutment and the current collector is greater than or equal to 30 degrees and less than or equal to 60 degrees. Thus, the central angle between the contact surface of the abutment and the current collector is greater than or equal to 30 degrees and less than or equal to 60 degrees, which can mitigate the risk of excessive heat generation due to a large contact area between the abutment and the current collector, and can mitigate the risk of coating quality being affected due to a small contact area between the abutment and the current collector.

[0017] In some embodiments, the coating apparatus further includes a transmission member configured to transport the current collector along a transport path so that the current collector passes through the gap between the die head and the abutting member. Thus, the abutting member remains stationary while the current collector is transported via the transmission member, enabling the abutting member to abut the transported current collector at the same location, thereby maintaining a constant gap between the abutting member and the die head. This mitigates the risk of coating weight fluctuations due to changes in the gap between the abutting member and the die head, thereby improving the thickness consistency of the current collector coating.

[0018] In some embodiments, the transmission member includes a rotating roller, the circumferential surface of the rotating roller being configured to contact the current collector, and the rotating roller being capable of rotating about its own central axis to transport the current collector. Thus, the circumferential surface of the rotating roller is in contact with the current collector, and the rotating roller rotates about its own central axis to transport the current collector. While the rotating roller is transporting the current collector, the rotating roller and the supporting member can also stretch the current collector, thereby facilitating the die head to coat the slurry onto the current collector.

[0019] To solve the above problems, the present application provides a coating system, which includes a current collector and the above coating device, and the coating device is used to coat the slurry on the surface of the current collector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a schematic structural diagram of a coating system according to one or more embodiments;

[0022] Figure 2 is a cross-sectional schematic diagram of a first embodiment of a stop member and a temperature control unit according to one or more embodiments;

[0023] Figure 3 is a cross-sectional schematic diagram of a second embodiment of a stop member and a temperature control unit according to one or more embodiments;

[0024] Figure 4 is a cross-sectional schematic diagram of a third embodiment of a stop member and a temperature control unit according to one or more embodiments;

[0025] Figure 5 is a cross-sectional schematic diagram of a fourth embodiment of a stop member and a temperature control unit according to one or more embodiments;

[0026] Figure 6 is a schematic structural diagram of a push member according to one or more embodiments.

[0027] Reference numerals: coating system 1; coating device 10; current collector 20; abutment 100; heat dissipation duct 110; mounting groove 120; step 121; heat dissipation channel 130; confluence groove 140; heat dissipation fin 150; main body 160; temperature control unit 200; die head 300; transmission member 400; rotating roller 410; central angle A; radial direction X; axial direction Y. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0031] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0033] 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).

[0034] 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., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0036] Currently, market developments indicate that batteries are increasingly being used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. As battery applications continue to expand, market demand is also growing.

[0037] In some embodiments, the battery may include a housing and battery cells, and the battery cells are housed in the housing. In a battery, there may be multiple battery cells, and the multiple battery cells may be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that the multiple battery cells are connected in series and in parallel. The multiple battery cells may be directly connected in series, in parallel, or in a hybrid connection, and then the whole formed by the multiple battery cells is housed in the housing; of course, the battery may also be a battery module formed by first connecting multiple battery cells in series, in parallel, or in a hybrid connection, and then the multiple battery modules are connected in series, in parallel, or in a hybrid connection to form a whole, and then housed in the housing. The battery may also include other structures. For example, the battery may also include a busbar component for achieving electrical connection between the multiple battery cells.

[0038] Battery cell production methods include laminated and wound methods. Laminated batteries offer uniform current collection, low internal resistance, and high specific power. However, to achieve high precision, they require extremely high mold accuracy, high equipment investment, and a complex process, resulting in low production efficiency. Wound batteries are simple to produce, with moderate equipment precision requirements during the production and assembly processes. They offer high production efficiency and low costs. In terms of performance, wound batteries offer excellent high and low temperature resistance, rapid charging, an extremely long lifespan, stable high output voltage, a sturdy structure, and strong shock resistance.

[0039] A battery cell is the smallest unit that makes up a battery. A battery cell may include a housing, an electrode assembly, and other functional components.

[0040] The outer shell includes an end cap and a shell. The end cap refers to a component that covers the opening of the shell to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the shell to match the shell. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easily deformed when squeezed and collided, so that the battery cell can have a higher structural strength and improved safety performance. The shell is a component used to cooperate with the end cap to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate electrode assemblies, electrolytes and other components. The shell and the end cap can be independent components, and an opening can be set on the shell, and the internal environment of the battery cell is formed by covering the opening with the end cap.

[0041] The electrode assembly is the component in the battery cell where the electrochemical reaction occurs. One or more electrode assemblies may be contained in the housing. The electrode assembly is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and usually an isolator is provided between the positive electrode sheet and the negative electrode sheet. The electrode sheet may include a current collector and an active material layer. During the production process of the battery, the slurry needs to be sprayed out through a die head and coated on the current collector to form the active material layer. During the coating process, the current collector will move relative to the abutment, causing the temperature of the abutment to rise. If the temperature of the abutment is too high, it is easy to damage the current collector and affect the consistency of the coating.

[0042] In order to solve the technical problems in the related art, the present application provides a coating equipment and a coating system. The coating equipment includes a die head, a push piece and a temperature control unit. The push piece abuts the current collector, the die head coats the slurry on the current collector, and the temperature control unit adjusts the temperature of the push piece, thereby reducing the risk of damage to the current collector due to deformation or wrinkling of the current collector caused by high temperature, and reducing the risk of poor coating thickness consistency due to deformation of the push piece due to overheating affecting the distance between the push piece and the current collector.

[0043] Specifically, see Figure 1 , Figure 1 is a schematic structural diagram of a coating system according to one or more embodiments.

[0044] The coating system 1 includes a current collector 20 and a coating device 10 . The coating device 10 is used to coat the slurry on the surface of the current collector 20 .

[0045] The current collector 20 may include, but is not limited to, a positive electrode current collector and a negative electrode current collector, and the slurry may include, but is not limited to, a positive electrode active material and a negative electrode active material. The slurry of the positive electrode active material may be coated on the positive electrode current collector and dried to form a positive electrode sheet, and the slurry of the negative electrode active material may be coated on the negative electrode current collector and dried to form a negative electrode sheet.

[0046] The positive electrode current collector may be a metal foil or a composite current collector 20. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector 20 may include a polymer material base layer and a metal layer. The composite current collector 20 may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide and their respective modified compounds, and the positive electrode active material may also use other traditional materials that can be used as battery positive electrode active materials. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium-containing phosphates include, but are not limited to, at least one of lithium iron phosphate, a composite material of lithium iron phosphate and carbon, lithium manganese phosphate, a composite material of lithium manganese phosphate and carbon, lithium iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon. Examples of lithium transition metal oxides include, but are not limited to, at least one of lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, and modified compounds thereof.

[0047] The negative electrode current collector 20 can be a metal foil, metal foam, or a composite current collector. For example, the metal foil can be silver-surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium. The metal foam can be nickel foam, copper foam, aluminum foam, alloy foam, or carbon foam. The composite current collector 20 can include a polymer base layer and a metal layer. The composite current collector 20 can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy) on a polymer substrate (such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). The negative electrode active material can be any negative electrode active material commonly known in the art for battery cells. By way of example, the negative electrode active material can include at least one of the following: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate. The silicon-based material may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based material may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used singly or in combination of two or more.

[0048] The coating device 10 is used for coating slurry on the surface of the current collector 20. Specifically, the coating device 10 comprises a die head 300, a top piece 100, and a temperature control device 200, the top piece 100 is arranged in a spaced manner with the die head 300; the temperature control device 200 is used for adjusting the temperature of the top piece 100; wherein the gap between the die head 300 and the top piece 100 is used for the current collector 20 to pass through, and the current collector 20 and the top piece 100 move relatively, the top piece 100 is used for abutting against the side surface of the current collector 20 during the movement of the current collector 20, and the die head 300 is used for coating slurry on the side surface of the current collector 20 away from the top piece 100.

[0049] The die head 300 can have a discharge port, and the slurry can be coated on the current collector 20 from the discharge port of the die head 300. The coating device 10 can comprise a slurry supply source, which can be used to provide slurry, and the slurry supply source can be connected with the die head 300 through a pipeline, and when it is needed to coat slurry on the current collector 20, the slurry can be inputted into the die head 300 through the slurry supply source, and then the slurry is coated on the current collector 20 through the discharge port. The top piece 100 can be understood as a structural component for abutting against the current collector 20, which can comprise but is not limited to a solid structure such as a roller or a ball. The top piece 100 can be arranged in a spaced manner with the die head 300, for example, the top piece 100 is located at the position of the discharge port of the die head 300, and the position between the die head 300 and the top piece 100 can be adjusted to change the gap between the top piece 100 and the die head 300. The current collector 20 can be transported through other transmission mechanisms, the current collector 20 can be wound on an initial roller, the current collector 20 is taken out of the initial roller through the transmission mechanism, and the current collector 20 passes through the gap between the top piece 100 and the die head 300, so that the die head 300 coats slurry on the side surface of the current collector 20 away from the top piece 100, and the current collector 20 continues to be transported by the transmission mechanism after the coating of the slurry is completed, and is wound on a winding roller, so as to complete the coating work of the current collector 20. During the process that the current collector 20 passes through the die head 300 and the top piece 100, the top piece 100 can abut against the current collector 20, so that the side surface of the current collector 20 towards the die head 300 is more flat, so as to facilitate the die head 300 to coat the slurry on the current collector 20 evenly.

[0050] In this embodiment, the abutment 100 can be in a stationary state, or in a slightly floating state, so that when the current collector 20 passes through the gap between the abutment 100 and the die head 300, the current collector 20 and the abutment 100 will move relative to each other, thereby generating heat due to friction. A temperature control unit 200 can be connected to the abutment 100 and can be used to adjust the temperature of the abutment 100. For example, the temperature control unit 200 can heat or cool the abutment 100 to maintain a constant temperature. For example, the temperature control unit 200 can include a cooling device. When the abutment 100 and the current collector 20 heat up due to friction, the temperature control unit 200 can be used to reduce the temperature of the abutment 100, thereby alleviating the impact of the excessive temperature of the abutment 100 on the temperature of the current collector 20. The temperature control unit 200 can include, but is not limited to, a water cooling device or an air cooling device, etc., as long as it can control the temperature of the abutment 100.

[0051] Through the above embodiment, the temperature control unit 200 is used to adjust the temperature of the resisting member 100, so that the temperature control unit 200 can alleviate the overheating of the resisting member 100 and the current collector 20 due to relative movement, reduce the risk of damage to the current collector 20 due to deformation or wrinkling of the current collector 20 caused by high temperature, and reduce the risk of deformation of the resisting member 100 due to overheating affecting the distance between the resisting member 100 and the current collector 20, thereby reducing the risk of poor coating thickness consistency.

[0052] In some embodiments, the contact surface between the abutting member 100 and the current collector 20 is in an arc shape. The abutting member 100 may be in the shape of a roller, and the current collector 20 contacts the circumferential surface of the abutting member 100. When the abutting member 100 and the current collector 20 are projected along the axial direction of the abutting member 100, the contact surface between the abutting member 100 and the current collector 20 is in an arc shape. The contact surface between the abutting member 100 and the current collector 20 is in an arc shape, thereby making the portion of the current collector 20 abutted by the abutting member 100 in an arc shape. Thus, the contact surface between the abutting member 100 and the current collector 20 is in an arc shape, which can reduce the contact area between the abutting member 100 and the current collector 20, thereby reducing the heat generated by the relative movement between the current collector 20 and the abutting member 100.

[0053] Furthermore, the central angle A corresponding to the contact surface between the push member 100 and the current collector 20 is greater than or equal to 30 degrees and less than or equal to 60 degrees. Specifically, the central angle A may include but is not limited to 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees or 60 degrees. Exemplarily, the central angle A may be greater than or equal to 30 degrees and less than or equal to 45 degrees, greater than or equal to 30 degrees and less than or equal to 40 degrees, or greater than or equal to 45 degrees and less than or equal to 60 degrees, and so on. Thus, the central angle A corresponding to the contact surface between the push member 100 and the current collector 20 is greater than or equal to 30 degrees and less than or equal to 60 degrees, which can alleviate the risk of generating more heat due to the large contact area between the push member 100 and the current collector 20, and can alleviate the risk of affecting the coating quality due to the small contact area between the push member 100 and the current collector 20.

[0054] In some embodiments, the coating device 10 further includes a transmission member 400, which is used to transport the current collector 20 along the transport path so that the current collector 20 passes through the gap between the die head 300 and the push-up member 100. The transmission member 400 can be located at any position, and the number of transmission members 400 can be multiple, and the current collector 20 can be moved along the transport path by cooperating with multiple transmission members 400. The stability during the coating process mainly depends on the coating pump speed and the gap between the push-up member 100 and the die head 300. However, if the push-up member 100 continues to rotate during the coating process, it is easy for the gap between the push-up member 100 and the die head 300 to change periodically with the rotation of the push-up member 100, resulting in poor coating consistency. In this embodiment, the transmission member 400 can be used to transport the current collector 20 along the transport path, and then, while the abutting member 100 remains stationary, the current collector 20 can also pass through the gap between the die head 300 and the abutting member 100, so that the current collector 20 is abutted by the abutting member 100 and the current collector 20 and the abutting member 100 move relative to each other during the movement. As a result, the abutting member 100 remains stationary, and the current collector 20 is transported by the transmission member 400, so that the same part of the abutting member 100 can abut the current collector 20 being transported, so that the gap between the abutting member 100 and the die head 300 remains unchanged, thereby alleviating the risk of coating weight fluctuations due to changes in the gap between the abutting member 100 and the die head 300, and thereby improving the thickness consistency of the coating of the current collector 20.

[0055] Furthermore, the transmission member 400 includes a rotating roller 410, the circumferential surface of which is used to contact the current collector 20, and the rotating roller 410 can rotate around its own central axis to transport the current collector 20. The circumferential surface of the rotating roller 410 can contact the current collector 20 and cooperate with other components to stretch the current collector 20, thereby driving the current collector 20 to move when the rotating roller 410 rotates around its own central axis. The transmission member 400 may also include a drive motor, which is connected to the rotating roller 410 and can be driven by the drive motor to rotate the rotating roller 410 around its own central axis. The rotating roller 410 can be located downstream of the abutment member 100 on the conveying path of the current collector 20. In some embodiments, there may be multiple rotating rollers 410, and all of the multiple rotating rollers 410 may be in contact with the current collector 20, thereby cooperating to transport the current collector 20. For example, there may be two rotating rollers 410, one rotating roller 410 may be located downstream of the abutting member 100 on the transport path of the current collector 20, and the other rotating roller 410 may be located upstream of the abutting member 100 on the transport path of the current collector 20, so that the two rotating rollers 410 can cooperate to transport the current collector 20. Thus, the circumferential surface of the rotating roller 410 is in contact with the current collector 20, and the rotating roller 410 rotates around its own central axis to transport the current collector 20. While the current collector 20 is being transported by the rotating roller 410, the current collector 20 can also be stretched by the rotating roller 410 in cooperation with the support member, thereby facilitating the die head 300 to coat the slurry on the current collector 20.

[0056] In some embodiments, the resisting member 100 has a hollow structure. That is, the resisting member 100 may have a plurality of holes therein. For example, the resisting member 100 may have a plurality of through holes extending through both sides of the resisting member 100. The plurality of through holes may be spaced apart from each other, or may be interconnected. This increases the area of ​​the resisting member 100 exposed to the air, improves the cooling efficiency of the resisting member 100, and further mitigates the risk of overheating of the resisting member 100.

[0057] See also Figure 2 , Figure 2 is a cross-sectional schematic diagram of a first embodiment of an abutment member and a temperature control unit according to one or more embodiments.

[0058] The support member 100 is provided with a heat dissipation duct 110, which extends through opposing surfaces of the support member 100 along the axial direction Y. A temperature control unit 200 corresponds to at least one end of the heat dissipation duct 110 in the axial direction Y. The temperature control unit 200 is used to change the airflow velocity within the heat dissipation duct 110. The heat dissipation duct 110 extends through opposing surfaces of the support member 100, allowing air to enter the heat dissipation duct 110 from one end and exit the heat dissipation duct 110 from the other end. The temperature control unit 200 may include, but is not limited to, a blower or a suction blower. The temperature control unit 200 corresponds to at least one end of the heat dissipation duct 110 in the axial direction Y. For example, the temperature control unit 200 may include a blower, which is located at one end of the heat dissipation duct 110 in the axial direction Y. The blower can change the airflow within the heat dissipation duct 110 so that the airflow exits the heat dissipation duct 110 from the end of the heat dissipation duct 110 facing away from the blower. Alternatively, the temperature control unit 200 may include a suction fan, which is located at one end of the heat dissipation duct 110 in the axial direction Y. The suction fan can change the airflow within the heat dissipation duct 110 so that the airflow exits the heat dissipation duct 110 from the end of the heat dissipation duct 110 located at the suction fan. Alternatively, the temperature control unit 200 may include a blower and a suction fan, which are located at each end of the heat dissipation duct 110. The blower changes the airflow within the heat dissipation duct 110 by blowing air into the heat dissipation duct 110, and the suction fan changes the airflow within the heat dissipation duct 110 by sucking air into the heat dissipation duct 110. Therefore, the heat dissipation duct 110 passes through the opposite surfaces of the supporting member 100 along the axial direction Y of the supporting member 100, and the temperature control unit 200 corresponds to at least one end of the heat dissipation duct 110 in the axial direction Y. The temperature control unit 200 can make the air flow in and out of the heat dissipation duct 110 from both ends, thereby improving the cooling efficiency of the supporting member 100 by changing the air flow in the heat dissipation duct 110, and further alleviating the risk of overheating of the supporting member 100.

[0059] Further, the abutting piece 100 is provided with a mounting groove 120, the mounting groove 120 is communicated with the heat dissipation air duct 110, and the temperature control device 200 is mounted in the mounting groove 120. The mounting groove 120 can be used to mount the temperature control device 200. For example, the temperature control device 200 can be placed in the mounting groove 120 from the slot of the mounting groove 120, and then the temperature control device 200 and the inner side wall of the mounting groove 120 can be detachably connected through bolts, buckles, threads or other connection methods. The depth of the mounting groove 120 can be greater than the thickness of the temperature control device 200, so that the temperature control device 200 is completely accommodated in the mounting groove 120. In this way, the temperature control device 200 is mounted in the mounting groove 120, which can reduce the occupation of external space by the temperature control device 200, improve the space utilization rate of the abutting piece 100, and the mounting groove 120 is communicated with the heat dissipation air duct 110, so that the distance between the temperature control device 200 and the heat dissipation air duct 110 is closer, and it is easier to change the airflow in the heat dissipation air duct 110 through the temperature control device 200, thereby reducing the risk of overheating of the abutting piece 100.

[0060] Referring to Figure 3 , Figure 3 is a cross-sectional view of a second embodiment of the abutting piece 100 and the temperature control device 200 according to one or more embodiments.

[0061] The radial dimension of the mounting groove 120 is greater than the radial dimension of the heat dissipation air duct 110, so that the connection part of the mounting groove 120 and the heat dissipation air duct 110 forms a step 121, and the temperature control device 200 is supported on the step 121. The step 121 can be the bottom wall of the mounting groove 120, the heat dissipation air duct 110 penetrates the bottom wall of the mounting groove 120 to communicate the mounting groove 120, and the step 121 can be a plane or the shape of the step 121 can match the temperature control device 200, so that the temperature control device 200 is stably supported on the step 121, thereby improving the stability of the temperature control device 200 mounted in the mounting groove 120, and improving the assembly efficiency of the temperature control device 200, etc.

[0062] Further, the number of the heat dissipation air ducts 110 is multiple, and the multiple heat dissipation air ducts 110 are arranged at intervals along the radial direction X of the abutting piece 100. The number of the heat dissipation air ducts 110 can be two, three, four or more, and the radial dimensions of different heat dissipation air ducts 110 can be the same or different. The multiple heat dissipation air ducts 110 can be arranged in sequence along the radial direction X of the abutting piece 100, or the multiple heat dissipation air ducts 110 can be arranged in a whole column. When the abutting piece 100 is provided with the mounting groove 120, the multiple heat dissipation air ducts 110 can be communicated with the mounting groove 120, so that the temperature control device 200 can change the airflow in the multiple heat dissipation air ducts 110 at the same time. In this way, the number of the heat dissipation air ducts 110 is multiple, and the multiple heat dissipation air ducts 110 are arranged at intervals along the radial direction X of the abutting piece 100, so that the airflow velocity in the multiple heat dissipation air ducts 110 can be changed at the same time through the temperature control device 200, thereby further improving the cooling efficiency of the abutting piece 100 and relieving the risk of overheating of the abutting piece 100.

[0063] Referring to Figure 4 , Figure 4 is a cross-sectional view of a third embodiment of the abutting member 100 and the temperature control device 200 according to one or more embodiments.

[0064] The abutting member 100 is provided with a heat dissipation flow channel 130, and the temperature control device 200 and the heat dissipation flow channel 130 are in communication to form a loop. The heat dissipation flow channel 130 can pass through any two side surfaces of the abutting member 100, and the temperature control device 200 can be in communication with two ports of the heat dissipation flow channel 130 through pipelines to form a loop with the heat dissipation flow channel 130. The temperature control device 200 can transport cooling liquid into the heat dissipation flow channel 130, so that the cooling liquid exchanges heat with the abutting member 100 in the heat dissipation flow channel 130, and then the cooling liquid after heat exchange is recovered to the temperature control device 200, and the temperature control device 200 cools the cooling liquid again to achieve the purpose of circulating the cooling liquid. The cooling liquid can include but is not limited to cooling oil or water, etc. Thus, the temperature control device 200 and the heat dissipation flow channel 130 are in communication, so that the temperature control device 200 and the heat dissipation flow channel 130 form a loop, which facilitates the flow of the heat dissipation fluid into or out of the heat dissipation channel through the temperature control device 200, thereby cooling the abutting member 100 and relieving the risk of overheating of the abutting member 100.

[0065] Further, the number of the heat dissipation flow channels 130 is multiple, and the multiple heat dissipation flow channels 130 are arranged along the radial direction X of the abutting member 100, and the multiple heat dissipation flow channels 130 are in communication with the temperature control device 200, respectively. The number of the heat dissipation flow channels 130 can be two, three, four or more, and the radial dimensions of different heat dissipation flow channels 130 can be the same or different, and the multiple heat dissipation flow channels 130 can be arranged in sequence along the radial direction X of the abutting member 100, or the multiple heat dissipation flow channels 130 can be arranged in a whole column. The temperature control device 200 can be in communication with each heat dissipation flow channel 130, respectively. For example, the temperature control device 200 includes two pipelines, and each pipeline can include a main pipe and multiple branch pipes. One end of the main pipe of the first pipeline is connected with the temperature control device 200, and the other end is connected with one end of the multiple branch pipes. The other end of one branch pipe is in communication with one end of one heat dissipation flow channel 130. One end of the main pipe of the second pipeline is connected with the temperature control device 200, and the other end is connected with one end of the multiple branch pipes. The other end of one branch pipe is in communication with the other end of one heat dissipation flow channel 130, so that the temperature control device 200 is in communication with each heat dissipation flow channel 130 to form a loop. Thus, the number of the heat dissipation flow channels 130 is multiple, and the multiple heat dissipation flow channels 130 are arranged along the radial direction X of the abutting member 100, so that the heat dissipation fluid can flow into or out of the multiple heat dissipation flow channels 130 through the temperature control device 200 at the same time, which further improves the cooling efficiency of the abutting member 100 and relieves the risk of overheating of the abutting member 100.

[0066] Referring toFigure 5 , Figure 5 is a cross-sectional view of a fourth embodiment of the abutting member and the temperature control device according to one or more embodiments.

[0067] The abutting member 100 is provided with two converging grooves 140, one of which is connected to one end of the plurality of heat dissipation channels 130, and the other of which is connected to the other end of the plurality of heat dissipation channels 130. The temperature control device 200 is connected to the two converging grooves 140, respectively, so that the temperature control device 200 and the heat dissipation channels 130 form a loop. The radial dimension of the converging groove 140 can be greater than the radial dimension of the heat dissipation channel 130, so that one converging groove 140 can be connected to one end of the plurality of heat dissipation channels 130. The plurality of heat dissipation channels 130 can extend through the opposite side surfaces of the abutting member 100 in the axial direction Y of the abutting member 100, and the converging grooves 140 can be located on both sides of the abutting member 100 in the axial direction Y. The temperature control device 200 can be connected to the two converging grooves 140 through pipes, and then send cooling liquid to one of the converging grooves 140. The cooling liquid is dispersed to each heat dissipation channel 130 after entering the converging groove 140, and the cooling liquid is converged in the other converging groove 140 and is recovered to the temperature control device 200 through the pipe after heat exchange. In this way, by providing two converging grooves 140, the two converging grooves 140 can be connected to the plurality of heat dissipation channels 130, and the temperature control device 200 only needs to be connected to the two converging grooves 140 to form a loop with the temperature control device 200 and the plurality of heat dissipation channels 130, thereby reducing the complexity of forming a loop with the temperature control device 200 and the plurality of heat dissipation channels 130, and improving the cooling efficiency of the abutting member 100, etc.

[0068] Referring to Figure 6 , Figure 6 is a structural schematic view of the abutting member 100 according to one or more embodiments.

[0069] The abutment 100 includes a plurality of heat dissipating fins 150 and a main body 160. The main body 160 is used to abut against one side surface of the current collector 20 during movement of the current collector 20. The plurality of heat dissipating fins 150 are spaced apart on the main body 160. The main body 160 may be in the shape of a roller, and the main body 160 may abut against the current collector 20 as the current collector 20 passes through the die 300 and the abutment 100. The heat dissipating fins 150 may be located on the side of the main body 160 facing away from the current collector 20. The plurality of heat dissipating fins 150 may be arranged in sequence along the axial direction Y of the main body 160, thereby allowing airflow to flow through the gaps between two heat dissipating fins 150. The surface of the main body 160 on which the heat dissipating fins 150 are mounted may be a flat surface to improve the stability of the installation of the heat dissipating fins 150, or the heat dissipating fins 150 and the main body 160 may be integrally formed. In other embodiments, the main body 160 can be hollow, and the heat dissipation fins 150 can be installed inside the channel of the main body 160, which can also achieve the purpose of increasing the heat dissipation area of ​​the abutment 100. Therefore, the heat dissipation fins 150 are arranged at intervals on the main body 160, and the cooling area of ​​the main body 160 can be increased by multiple heat dissipation fins 150, thereby improving the cooling efficiency of the main body 160 and further reducing the risk of overheating of the main body 160.

[0070] In summary, the temperature control unit 200 is used to adjust the temperature of the resisting member 100 so that the temperature control unit 200 can alleviate the overheating of the resisting member 100 and the current collector 20 due to relative movement, reduce the risk of damage to the current collector 20 due to deformation or wrinkling of the current collector 20 caused by high temperature, and reduce the risk of deformation of the resisting member 100 due to overheating affecting the distance between the resisting member 100 and the current collector 20, thereby reducing the risk of poor coating thickness consistency.

[0071] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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, The coating equipment includes: Die head; a push member, spaced apart from the die head; A temperature control unit, used for adjusting the temperature of the abutting member; The gap between the die head and the abutment is used for the current collector to pass through, and the current collector and the abutment move relative to each other. The abutment is used to abut against one side surface of the current collector during the movement of the current collector, and the die head is used to coat the slurry on the side surface of the current collector facing away from the abutment.

2. The coating device according to claim 1, characterized in that The abutting member is of a hollow structure.

3. The coating device according to claim 1, characterized in that The support member is provided with a heat dissipation duct, which passes through the opposite surfaces of the support member along the axial direction of the support member. The temperature control unit corresponds to at least one end of the heat dissipation duct in the axial direction, and the temperature control unit is used to change the air flow rate in the heat dissipation duct.

4. The coating device according to claim 3, characterized in that The supporting member is provided with a mounting groove, the mounting groove is communicated with the heat dissipation duct, and the temperature control unit is installed in the mounting groove.

5. The coating device according to claim 4, characterized in that The radial dimension of the mounting groove is greater than the radial dimension of the heat dissipation duct, so that a step is formed at the connection between the mounting groove and the heat dissipation duct, and the temperature control unit is supported on the step.

6. The coating device according to claim 3, characterized in that There are multiple heat dissipation ducts, and the multiple heat dissipation ducts are arranged at intervals along the radial direction of the supporting member.

7. The coating device according to claim 1, characterized in that The abutting member is provided with a heat dissipation channel, and the temperature control unit is communicated with the heat dissipation channel, so that the temperature control unit and the heat dissipation channel cooperate to form a loop.

8. The coating device according to claim 7, characterized in that There are multiple heat dissipation channels, which are spaced apart along the radial direction of the abutting member, and are respectively connected to the temperature control unit.

9. The coating device according to claim 8, characterized in that The support member is provided with two confluence grooves, one of which is connected to one end of multiple heat dissipation channels at the same time, and the other confluence groove is connected to the other end of multiple heat dissipation channels at the same time. The temperature control unit is respectively connected to the two confluence grooves, so that the temperature control unit and the heat dissipation channel cooperate to form a loop.

10. The coating device according to claim 1, characterized in that The abutting member includes a plurality of heat dissipation fins and a main body. The main body is used to abut against a side surface of the current collector during the movement of the current collector. The plurality of heat dissipation fins are arranged on the main body at intervals.

11. The coating device according to claim 1, characterized in that The contact surface between the abutting member and the current collector is in an arc shape.

12. The coating device according to claim 11, characterized in that A central angle between the abutting member and the contact surface of the current collector is greater than or equal to 30 degrees and less than or equal to 60 degrees.

13. The coating device according to any one of claims 1 to 12, characterized in that: The coating device further includes a transmission member, which is used to transport the current collector along a transport path so that the current collector passes through a gap between the die head and the abutting member.

14. The coating device according to claim 13, characterized in that The transmission member includes a rotating roller, a peripheral surface of the rotating roller is used to contact the current collector, and the rotating roller can rotate around its own central axis to transport the current collector.

15. A coating system, characterized in that: The coating system comprises a current collector and the coating device according to any one of claims 1 to 14, wherein the coating device is used to coat the slurry on the surface of the current collector.

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