Pole piece unwinding and baking device based on heat radiation and coating machine

Abstract

The utility model discloses an electrode piece unwinding and baking device based on heat radiation and coating machine relates to the technical field of battery processing, the utility model discloses an electrode piece unwinding and baking device based on heat radiation includes box, transmission assembly and radiation subassembly, is equipped with drying room in the box, transmission assembly includes a plurality of transmission roller, interval setting is in the drying room, forms the electrode piece traction area between adjacent two transmission rollers, and radiation subassembly sets up in the drying room. Transmission assembly drives electrode piece transmission through a plurality of transmission roller, and transmission roller can heat the part of electrode piece through transmission roller to dry electrode piece, the electrode piece traction area is formed between adjacent two transmission rollers, through the effect of two transmission rollers, makes the electrode piece open in the electrode piece traction area, improves the contact surface of electrode piece and air, accelerates the drying of electrode piece surface, and radiation subassembly radiates heat to the electrode piece traction area to heat and dry the electrode piece in the electrode piece traction area. Through transmission roller and radiation subassembly dry electrode piece, improve drying efficiency, reduce drying length.

Description

Technical Field

[0001] This utility model relates to the technical field of battery processing, and in particular to an electrode uncoiling and baking device and a coating machine based on thermal radiation. Background Technology

[0002] Lithium battery electrodes require a drying and baking process during production. The drying and baking process in related technologies involves first cutting the material rolls into smaller rolls and then using hot air for vacuum heating and drying, which has low drying efficiency and a long drying time. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an electrode uncoiling and baking device based on thermal radiation, which has high drying efficiency.

[0004] This utility model also proposes a coating machine.

[0005] This utility model provides an electrode uncoiling and baking device based on thermal radiation, comprising:

[0006] The box contains a drying chamber;

[0007] The transmission assembly includes multiple transmission rollers spaced apart in the drying chamber; the transmission rollers are used to drive the electrode sheets and heat the portion of the electrode sheets that passes through the transmission rollers, and an electrode sheet traction zone is formed between two adjacent transmission rollers;

[0008] A radiation assembly is disposed in the drying chamber and is used to radiate heat to the electrode traction area.

[0009] The transmission assembly drives the electrode sheets via multiple transmission rollers, which heat the portion of the electrode sheet passing over them for drying. An electrode traction zone is formed between adjacent transmission rollers, causing the electrode sheets to open up within this zone, increasing the contact area between the electrode sheets and air and accelerating surface drying. A radiation assembly radiates heat into the electrode traction zone, further heating and drying the electrode sheets within this zone. This combination of transmission rollers and radiation assembly improves drying efficiency and reduces drying time.

[0010] In some embodiments of this utility model, the number of radiation components is set to multiple, and the radiation components are arranged one-to-one with the electrode traction areas; the radiation components are provided with radiation channels, and the electrode traction areas are at least partially located in the corresponding radiation channels; the radiation channels are used for the electrodes to pass through, and the radiation components are used to radiate heat through the radiation channels.

[0011] In some embodiments of this utility model, the radiation component includes a first radiating element and a second radiating element disposed opposite to each other, and the radiation channel is formed between the first radiating element and the second radiating element.

[0012] In some embodiments of this utility model, the same radiation component includes a plurality of first radiating elements and a plurality of second radiating elements, with the plurality of first radiating elements arranged at intervals and the plurality of second radiating elements arranged at intervals.

[0013] In some embodiments of this utility model, the first radiating element and the second radiating element are both one of an infrared heating plate, an electromagnetic heater, and a laser heater; and / or,

[0014] The drive roller is either a heat-conducting oil heating roller or an electromagnetic heating roller.

[0015] In some embodiments of this utility model, the electrode uncoiling and baking device further includes a temperature sensor, which is disposed on the transmission roller and / or the radiation component.

[0016] In some embodiments of this utility model, the transmission roller includes a first transmission roller and a second transmission roller, the first transmission roller is located above the second transmission roller, and the first transmission roller and the second transmission roller are staggered in the height direction of the transmission assembly; the first transmission roller and the second transmission roller are alternately arranged in the drying chamber, and the electrode traction area is located between the first transmission roller and the second transmission roller.

[0017] In some embodiments of this utility model, the transmission roller is a heat transfer oil heating roller or an electromagnetic heating roller.

[0018] In some embodiments of this utility model, the housing includes an unwinding chamber and a rewinding chamber, and the electrode unwinding and baking device further includes an unwinding assembly and a rewinding assembly; the unwinding assembly is installed in the unwinding chamber and is used to unwind the electrode; the rewinding assembly is installed in the rewinding chamber and is used to rewind the electrode; both the unwinding chamber and the rewinding chamber are provided with openings communicating with the drying chamber, and the openings are used for the electrode to pass through; the housing is provided with a heat insulation component, which is used to limit heat transfer between the drying chamber and the rewinding chamber, and between the drying chamber and the unwinding chamber.

[0019] In some embodiments of this utility model, the electrode unwinding and baking device further includes an air extraction component, the drying chamber is provided with an air extraction port, and the air extraction component extracts air from the drying chamber through the air extraction port; the unwinding chamber and / or the winding chamber are provided with air inlets.

[0020] The coating machine provided in the second aspect of this utility model includes the electrode unwinding and baking device based on thermal radiation described in the first aspect embodiment.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the electrode uncoiling and baking device based on thermal radiation provided in the embodiment of this utility model;

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0024] Figure label:

[0025] 100. Chamber; 110. Drying chamber; 111. Exhaust port; 120. Unwinding chamber; 130. Rewinding chamber; 140. Opening; 150. Air inlet;

[0026] 200. Transmission assembly; 210. Transmission roller; 211. First transmission roller; 212. Second transmission roller; 220. Electrode traction area; 230. Electrode;

[0027] 300. Radiation assembly; 310. First radiating element; 320. Second radiating element; 330. Radiation channel;

[0028] 400. Unwind assembly;

[0029] 500. Rewinding assembly; 510. Cooling roller;

[0030] 600. Temperature sensor;

[0031] 700. Dry structure;

[0032] 800. Air extraction assembly;

[0033] 900. Thermal insulation components. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] like Figures 1 to 2 As shown, the electrode uncoiling and baking device based on thermal radiation provided in the first aspect embodiment of this utility model includes a housing 100, a transmission assembly 200, and a radiation assembly 300. The housing 100 is provided with a drying chamber 110. The transmission assembly 200 includes a plurality of transmission rollers 210, which are spaced apart in the drying chamber 110. The transmission rollers 210 are used to drive the electrode 230 and heat the part of the electrode 230 that passes through the transmission rollers 210, and an electrode traction area 220 is formed between two adjacent transmission rollers 210. The radiation assembly 300 is disposed in the drying chamber 110 and is used to radiate heat to the electrode traction area 220.

[0038] The transmission assembly 200 drives the electrode 230 via multiple transmission rollers 210, and the transmission rollers 210 can heat the portion of the electrode 230 that passes over them to dry the electrode 230. An electrode traction zone 220 is formed between two adjacent transmission rollers 210. Through the action of the two transmission rollers 210, the electrode 230 opens up in the electrode traction zone 220, increasing the contact area between the electrode 230 and the air, and accelerating the drying of the electrode 230 surface. The radiation assembly 300 radiates heat to the electrode traction zone 220 to heat and dry the electrode 230 within the zone. Drying the electrode 230 through the transmission rollers 210 and the radiation assembly 300 improves drying efficiency and reduces drying time.

[0039] The drive roller 210 is rotatably connected inside the drying chamber 110. The electrode 230 is wound around the drive roller 210 for transmission. Each part of the electrode 230 sequentially approaches and passes through the surface of the drive roller 210, enabling the drive roller 210 to transfer heat to the electrode 230, thereby achieving the drying of the electrode 230. Multiple drive rollers 210 are spaced apart, and an electrode traction zone 220 is formed between two adjacent drive rollers 210. The adjacent drive rollers 210 keep the electrode 230 taut within the electrode traction zone 220, which is more conducive to the drying operation of the electrode 230. The drive roller 210 is used to drive the electrode 230; therefore, each part of the electrode 230 needs to pass through the drive roller 210. Heating the electrode 230 through the drive roller 210 ensures that each part of the electrode 230 can receive heat from the drive roller 210.

[0040] By radiating heat to the electrode traction area 220 through the radiant component 300, heat can be directly transferred to the surface of the electrode 230 without heating the surrounding air or container. This results in rapid heating and reduced energy loss. Furthermore, radiant heating does not require direct contact with the electrode 230, thus reducing damage to the electrode 230.

[0041] In some embodiments, such as Figure 1 As shown, multiple radiation components 300 are provided to improve the drying efficiency of the electrode 230. The radiation components 300 are arranged one-to-one with the electrode traction areas 220, which is more conducive to the uniform heating of each electrode traction area 220. The radiation components 300 are provided with radiation channels 330, and the electrode traction areas 220 are at least partially located in the corresponding radiation channels 330. The radiation channels 330 are used for the electrode 230 to pass through, and the radiation components 300 are used to radiate heat through the radiation channels 330. This allows the radiation components 300 to radiate heat to the electrode 230 in a targeted manner, which can achieve precise heating, improve the utilization rate of the heat radiated by the radiation components 300, and thus improve the drying effect. During the transmission process of the electrode 230, the electrode 230 is transmitted from one transmission roller 210 to another transmission roller 210 through the radiation channels 330 to ensure that all parts of the electrode 230 can receive the heat radiated by the radiation components 300.

[0042] In some embodiments, such as Figures 1 to 2 As shown, the radiation assembly 300 includes a first radiating element 310 and a second radiating element 320 disposed opposite to each other, forming a radiation channel 330 between the first radiating element 310 and the second radiating element 320. The first radiating element 310 radiates heat to one side of the electrode 230, and the second radiating element 320 radiates heat to the other side of the electrode 230, so that both sides of the electrode 230 can receive heat, thereby ensuring the drying effect on both sides of the electrode 230.

[0043] In some embodiments, such as Figure 2 As shown, the same radiating component 300 includes multiple first radiating elements 310 and multiple second radiating elements 320. The multiple first radiating elements 310 are arranged at intervals, and the multiple second radiating elements 320 are arranged at intervals to avoid excessive heat concentration and ensure that the temperature of each area of ​​the radiating channel 330 is more uniform, thereby preventing deformation or damage to the electrode 230 due to local overheating. This arrangement allows for individual control of each first radiating element 310 and each second radiating element 320, making the heating operation more flexible.

[0044] In some embodiments, the first radiating element 310 and the second radiating element 320 are both one of an infrared heating plate, an electromagnetic heater, and a laser heater. An infrared heating plate heats an object by emitting infrared radiation, an electromagnetic heater heats an object by generating an alternating electromagnetic field, and a laser heater heats an object using a laser beam. Using one of these methods, the object can be heated directly without needing to heat the surrounding air, resulting in rapid heating and low energy loss.

[0045] In some embodiments, such as Figure 1 As shown, the transmission roller 210 includes multiple first transmission rollers 211 and multiple second transmission rollers 212. The first transmission rollers 211 are located above the second transmission rollers 212, and the first transmission rollers 211 and the second transmission rollers 212 are staggered in the height direction of the transmission assembly 200. The first transmission rollers 211 and the second transmission rollers 212 are alternately arranged in the drying chamber 110, so that the electrode 230 is driven along a sawtooth path on the transmission assembly 200, increasing the stroke of the electrode 230 in the drying chamber 110, which is beneficial to the drying of the electrode 230. The electrode traction area 220 is located between the first transmission rollers 211 and the second transmission rollers 212, so that the radiation assembly 300 radiates heat to the electrode 230. The multiple first transmission rollers 211 can be located at the same height, and the multiple second transmission rollers 212 can be located at the same height.

[0046] In some embodiments, the drive roller 210 is a heat transfer oil heating roller or an electromagnetic heating roller. The heat transfer oil heating roller uses heat transfer oil as the heat medium to heat the roller; the electromagnetic heating roller is a heating roller made based on the principle of electromagnetic induction heating of metal, and has the advantages of high temperature, good temperature uniformity, easy maintenance, low energy consumption, and no pollution.

[0047] In some embodiments, such as Figures 1 to 2As shown, the housing 100 includes an unwinding chamber 120 and a rewinding chamber 130. The electrode unwinding and baking device also includes an unwinding assembly 400 and a rewinding assembly 500. The unwinding assembly 400 is installed in the unwinding chamber 120 and is used to unwind the electrode 230. The rewinding assembly 500 is installed in the rewinding chamber 130 and is used to rewind the electrode 230. Both the unwinding chamber 120 and the rewinding chamber 130 are provided with openings 140 that connect to the drying chamber 110. The openings 140 are used for the electrode 230 to pass through. By installing the unwinding assembly 400 in the unwinding chamber 120 and the rewinding assembly 500 in the rewinding chamber 130, the influence of heat in the drying chamber 110 on the unwinding assembly 400 and the rewinding assembly 500 can be minimized, and the damage to the unwinding assembly 400 and the rewinding assembly 500 caused by high temperature can be reduced. The unwinding chamber 120 is located on the side of the drying chamber 110 away from the winding chamber 130, which is beneficial to the transmission of the electrode 230.

[0048] In some embodiments, such as Figures 1 to 2 As shown, the electrode uncoiling and baking apparatus also includes a temperature sensor 600. The temperature sensor 600 is disposed in at least one of the transmission roller 210 and the radiation assembly 300. The temperature sensor 600 can monitor the temperature of the electrode surface 230 in real time to avoid damage to the electrode 230 due to excessive temperature.

[0049] In some embodiments, such as Figures 1 to 2 As shown, the transmission assembly 200 and multiple radiation assemblies 300 constitute the drying structure 700. The temperature sensor 600 is located on the side of the drying structure 700 near the unwinding chamber 120 to prevent the temperature of the drying structure 700 from being too high and affecting the unwinding mechanism. The first radiation element 310 is located on the side of the radiation channel 330 near the unwinding chamber 120, and the temperature sensor 600 can be set between two adjacent first radiation elements 310.

[0050] In some embodiments, such as Figures 1 to 2 As shown, the electrode uncoiling and baking device also includes a cooling assembly, which comprises multiple cooling rollers 510 rotatably connected within the winding chamber 130. The cooling rollers 510 receive the electrode sheets 230 drawn from the drying chamber 110, cool them, and then convey the cooled electrode sheets 230 to the winding assembly 500 for winding. This prevents the high temperature of the electrode sheets 230 from affecting the sensors within the winding assembly 500, ensuring smooth winding of the electrode sheets 230. The cooling rollers 510 can be water-cooled rollers or oil-cooled rollers. Water-cooled rollers are rollers through which cooling water flows, allowing precise control of the roller surface temperature to regulate the temperature of the electrode sheets 230 and ensure stability during production. Oil-cooled rollers are rollers through which cooling oil flows, regulating the roller surface temperature through the cooling effect of the oil to cool the electrode sheets 230.

[0051] In some embodiments, such as Figures 1 to 2 As shown, a temperature sensor 600 is provided on the cooling roller 510 to detect the surface temperature of the cooled electrode 230, so as to ensure that the electrode 230 is cooled and to avoid the high temperature of the electrode 230 from affecting the sensor in the winding assembly 500.

[0052] In some embodiments, such as Figures 1 to 2 As shown, the housing 100 is equipped with a heat insulation component 900. The heat insulation component 900 is used to limit heat transfer between the drying chamber 110 and the winding chamber 130, and between the drying chamber 110 and the unwinding chamber 120, preventing heat from being conducted to the unwinding chamber 120 and the winding chamber 130. Two heat insulation components 900 are provided, one between the drying chamber 110 and the winding chamber 130, and the other between the drying chamber 110 and the unwinding chamber 120. Generally, the heat insulation component 900 is provided on the inner wall of the drying chamber 110, and the heat insulation component 900 can be foam.

[0053] In some embodiments, such as Figures 1 to 2 As shown, the electrode unwinding and baking apparatus also includes an air extraction component 800, and the drying chamber 110 is provided with an air extraction port 111. The air extraction component 800 extracts air from the drying chamber 110 through the air extraction port 111. At least one of the unwinding chamber 120 and the winding chamber 130 is provided with an air inlet 150.

[0054] During drying, the air inlet 150 is closed, and the vacuum pump 800 evacuates air through the vacuum port 111, creating a vacuum inside the drying chamber 110. This vacuum environment lowers the boiling point of water, promoting moisture migration within the drying chamber 110 and improving drying efficiency. The cooling roller 510 rapidly cools the water under vacuum, eliminating water absorption during the cooling process. After drying, the air inlet 150 is opened to allow air to enter. Typically, the vacuum pump 800 is used.

[0055] The coating machine provided in the second aspect of this utility model includes the electrode unwinding and baking device based on thermal radiation as described in the first aspect.

[0056] The electrode unwinding and baking device based on thermal radiation has the beneficial effects of the above embodiments, and the coating machine has the corresponding beneficial effects of the above embodiments. The specific implementation method can be referred to the above embodiments, and will not be repeated in this application.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrode uncoiling and baking apparatus based on thermal radiation, characterized in that, include: The box (100) is equipped with a drying chamber (110). The transmission assembly (200) includes a plurality of transmission rollers (210) spaced apart in the drying chamber (110); the transmission rollers (210) are used to drive the electrode sheets and heat the portion of the electrode sheets (230) that passes through the transmission rollers (210), and an electrode traction zone (220) is formed between two adjacent transmission rollers (210). A radiation assembly (300) is disposed in the drying chamber (110) and is used to radiate heat to the electrode traction area (220).

2. The electrode uncoiling and baking apparatus based on thermal radiation according to claim 1, characterized in that, The number of radiation components (300) is set to multiple, and the radiation components (300) are arranged one-to-one with the electrode traction area (220); the radiation components (300) are provided with radiation channels (330), and the electrode traction area (220) is at least partially located in the corresponding radiation channel (330); the radiation channel (330) is used for the electrode (230) to pass through, and the radiation components (300) are used to radiate heat through the radiation channel (330).

3. The electrode uncoiling and baking apparatus based on thermal radiation according to claim 2, characterized in that, The radiation assembly (300) includes a first radiating element (310) and a second radiating element (320) disposed opposite to each other, and the radiation channel (330) is formed between the first radiating element (310) and the second radiating element (320).

4. The electrode uncoiling and baking apparatus based on thermal radiation according to claim 3, characterized in that, The same radiation component (300) includes a plurality of first radiating elements (310) and a plurality of second radiating elements (320), wherein the plurality of first radiating elements (310) are arranged at intervals and the plurality of second radiating elements (320) are arranged at intervals.

5. The electrode uncoiling and baking apparatus based on thermal radiation according to claim 3, characterized in that, The first radiating element (310) and the second radiating element (320) are both one of an infrared heating plate, an electromagnetic heater, and a laser heater; and / or, The drive roller (210) is a heat-conducting oil heating roller or an electromagnetic heating roller.

6. The electrode uncoiling and baking apparatus based on thermal radiation according to any one of claims 1 to 5, characterized in that, The electrode uncoiling and baking apparatus further includes a temperature sensor (600), which is disposed on the transmission roller (210) and / or the radiation assembly (300).

7. The electrode uncoiling and baking apparatus based on thermal radiation according to any one of claims 1 to 5, characterized in that, The transmission roller (210) includes a first transmission roller (211) and a second transmission roller (212). The first transmission roller (211) is located above the second transmission roller (212), and the first transmission roller (211) and the second transmission roller (212) are staggered in the height direction of the transmission assembly (200). The first transmission roller (211) and the second transmission roller (212) are alternately arranged in the drying chamber (110), and the electrode traction area (220) is located between the first transmission roller (211) and the second transmission roller (212).

8. The electrode uncoiling and baking apparatus based on thermal radiation according to any one of claims 1 to 5, characterized in that, The housing (100) includes an unwinding chamber (120) and a rewinding chamber (130). The electrode unwinding and baking device further includes an unwinding assembly (400) and a rewinding assembly (500). The unwinding assembly (400) is installed in the unwinding chamber (120) and is used to unwind the electrode (230). The rewinding assembly (500) is installed in the rewinding chamber (130) and is used to rewind the electrode (230). Both the (120) and the winding chamber (130) are provided with an opening (140) that connects to the drying chamber (110), the opening (140) being used for the electrode sheet (230) to pass through; the housing (100) is provided with a heat insulation component (900), the heat insulation component (900) being used to limit the heat transfer between the drying chamber (110) and the winding chamber (130) and between the drying chamber (110) and the unwinding chamber (120).

9. The electrode uncoiling and baking apparatus based on thermal radiation according to claim 8, characterized in that, The electrode unwinding and baking device further includes an air extraction component (800), the drying chamber (110) is provided with an air extraction port (111), and the air extraction component (800) extracts air from the drying chamber (110) through the air extraction port (111); the unwinding chamber (120) and / or the winding chamber (130) are provided with air inlets (150).

10. A coating machine, characterized in that, Includes the electrode unwinding and baking apparatus based on thermal radiation as described in any one of claims 1 to 9.

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