A lithium battery coating oven

Abstract

The utility model belongs to lithium battery processing technical field, propose a kind of lithium battery coating oven, comprising: drying oven, drying oven inner chamber is connected through filter box by first suction pipe, filter box output end is communicated with the input end of hot blast machine, the output end of hot blast machine is communicated with the inner chamber of drying oven through air supply pipe, drying oven inner chamber and purification tank inner chamber are interconnected, purification tank side wall is equipped with exhaust fan, and exhaust fan communicates purification tank inner chamber with external environment.The utility model's lithium battery coating oven, through hot blast machine is sent hot blast to the inner chamber of drying oven through air supply pipe, disperse to hot air by the hole flow distribution plate, coating layer is treated by drying, simultaneously by first suction pipe Synchronous carries out air draft, and based on dust extraction hood enlarges absorption area, impurity is filtered in conjunction with filter box, and in conjunction with purification tank and exhaust fan provides the continuous negative pressure suction force for drying oven inside, improve the airflow flow rate and heat exchange efficiency in drying oven, guarantee the effective filtration of impurity.Simultaneously, in conjunction with the dust extraction hood being set on the electrode sheet of conveyance, absorption area of first suction pipe is enlarged, and then improve dust collection efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery processing technology, and specifically relates to a lithium battery coating oven. Background Technology

[0002] Lithium batteries can be mainly divided into two categories: lithium-ion batteries and lithium primary batteries. They have many advantages, such as high energy density, light weight, long service life, and low self-discharge rate. They are high-performance chemical power sources that use lithium metal or lithium ions as the core energy carrier. In the processing of lithium batteries, a slurry made of positive and negative electrode materials needs to be uniformly coated onto the surface of the current collector to form electrode sheets. To achieve rapid evaporation of the solvent in the electrode sheets and to ensure that the coating adheres firmly to the current collector, an oven drying process is usually required.

[0003] In related technologies, the coating process of lithium battery electrode sheets mainly relies on the drying step of an oven. Traditional ovens are mostly rectangular boxes with several drying fans inside. By starting the fans, hot air is blown onto the surface of the electrode sheet, thereby achieving efficient drying of the coating layer and ensuring that the coating adheres firmly to the current collector. This effectively prevents problems such as blistering, cracking, or peeling of the coating, thereby improving the finished quality of the electrode sheet and production efficiency. However, during the process of transporting the current collector coated with slurry into the oven, impurities may fall onto the surface of the current collector. Under the action of the hot air blower, these impurities may adhere to the undried slurry layer and dry together, which may adversely affect the processing quality of the electrode sheet.

[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0005] To address the above problems, this utility model proposes a lithium battery coating oven, comprising: a drying oven, the inner cavity of the drying oven being connected to a filter box through a first suction pipe, the output end of the filter box being connected to the input end of a hot air blower, and the output end of the hot air blower being connected to the inner cavity of the drying oven through an air supply pipe.

[0006] A purification chamber with an inner cavity connected to the drying chamber is located on one side of the drying chamber. An exhaust fan is installed on the side wall of the purification chamber, which connects the inner cavity of the purification chamber to the external environment.

[0007] Furthermore, the drying chamber includes a first chamber body, an air supply pipe and a first suction pipe that are both connected to the inner cavity of the first chamber body, a first inlet on one side of the first chamber body, and a first outlet on the other side of the first chamber body that is arranged opposite to the first inlet, and the first outlet is connected to the inner cavity of the purification chamber.

[0008] Furthermore, the filter box includes a rectangular box body, with a filter plate coaxially sleeved on the inner wall of the rectangular box body. The connection ports of the hot air blower and the first suction pipe to the rectangular box body are located on both sides of the filter plate, and a cleaning door is movably provided on one side of the rectangular box body.

[0009] Furthermore, the purification box includes a second box body, with a second inlet on one side connected to the first outlet, and a second outlet on the other side arranged opposite to the second inlet. One end of the exhaust fan is connected to the inner cavity of the second box body.

[0010] Furthermore, the purification box also includes a filter assembly, which is coaxially sleeved on the inner wall of the second box. The connection port between the exhaust fan and the second box and the second inlet are located on both sides of the filter assembly.

[0011] Furthermore, the filter assembly includes one or more activated carbon plates arranged in an array.

[0012] Furthermore, a baffle plate is connected to the inner wall of the first chamber, and the connection ports of the air supply pipe, the first suction pipe and the first chamber are located on both sides of the baffle plate.

[0013] Furthermore, one end of the first suction tube extends into the inner cavity of the first box, and the other end of the first suction tube is coaxially connected to the dust collection hood located in the inner cavity of the first box, and the cross-sectional area of ​​the dust collection hood is larger than the cross-sectional area of ​​the first suction tube.

[0014] Furthermore, the inner cavity of the first housing is provided with a perforated diffuser plate, and the perforated diffuser plate, the baffle plate and the inner wall of the first housing form a first cavity and a second cavity. The air supply pipe is connected to the first cavity, and the side wall of the perforated diffuser plate is provided with a through hole connecting the first cavity and the second cavity.

[0015] Furthermore, the inner wall of the first housing is provided with a rectangular connecting frame located in the first cavity, the air supply pipe is connected to the rectangular connecting frame, and a square diffuser is embedded in the side of the rectangular connecting frame facing the perforated diffuser plate, and several guide holes facing the perforated diffuser plate are opened on the side wall of the square diffuser.

[0016] Furthermore, several rotating rollers are rotatably connected inside the drying oven, and the side walls of these rotating rollers together form a bearing surface, which connects to the first inlet and the first outlet.

[0017] Compared with the prior art, the embodiments of this utility model have at least the following advantages:

[0018] 1. The lithium battery coating oven of this utility model starts by blowing hot air from the top into the drying chamber through the air supply pipe, so that the hot air is blown onto the surface of the electrode sheet inside the drying chamber to dry the coating layer. At the same time as the hot air blows hot air, the first suction pipe simultaneously draws air to remove impurities that fall onto the surface of the current collector. The air with impurities can enter the interior of the filter box through the first suction pipe. The filter box can filter the impurities in the air to a certain extent to prevent impurities from being circulated into the drying chamber. It also recovers some of the hot air, thereby saving energy.

[0019] 2. By combining the purification box and exhaust fan, a continuous negative pressure suction force is provided inside the drying box, so that the gas discharged from the drying box is purified through the purification box, thereby reducing the impact of exhaust gas on the environment. Based on the hot air fan, the airflow rate and heat exchange efficiency inside the drying box are improved to ensure effective filtration of impurities. At the same time, it is strengthened to prevent hot air stagnation or backflow, and to avoid the accumulation of high temperature gas from having an adverse effect on the equipment or coating effect.

[0020] 3. The perforated diffuser plate in the inner cavity of the first chamber disperses the hot air output from the air supply pipe, improving the uniformity of the electrode drying process. At the same time, the dust extraction hood set above the conveyed electrode expands the absorption area of ​​the first suction pipe, thereby improving the dust extraction efficiency.

[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 objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a lithium battery coating oven in an embodiment of this utility model is shown;

[0024] Figure 2 A cross-sectional schematic diagram of a lithium battery coating oven in an embodiment of this utility model is shown;

[0025] Figure 3 It shows Figure 2 A partial enlarged schematic diagram of structure A in the middle;

[0026] Figure 4 It shows Figure 2 A schematic diagram of a partial enlargement of structure B in the middle.

[0027] In the diagram, 1. Drying oven; 101. First chamber; 102. First inlet; 103. First outlet; 2. Hot air blower; 3. Air supply duct; 4. Dust extraction hood; 5. First suction pipe; 6. Filter box; 601. Rectangular box; 602. Filter plate; 603. Cleaning door; 7. Purification chamber; 701. Second chamber; 702. Second inlet; 703. Second outlet; 704. Filter assembly; 8. Exhaust fan; 9. Square diffuser; 10. Baffle plate; 11. Perforated diffuser plate; 12. Rectangular connecting frame; 13. Rotating roller. Detailed Implementation

[0028] The following description provides many different embodiments or examples for implementing various features of the present invention. The elements and arrangements described in the specific examples below are only for concise expression of the present invention and are merely examples, not intended to limit the present invention.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] This utility model provides a lithium battery coating oven. Figure 1 A schematic diagram of a lithium battery coating oven according to an embodiment of the present invention is shown below. Figure 1 and Figure 2 The lithium battery coating oven includes: a drying box 1, the inner cavity of the drying box 1 is connected to a filter box 6 through a first suction pipe 5, the output end of the filter box 6 is connected to the input end of a hot air blower 2, and the output end of the hot air blower 2 is connected to the inner cavity of the drying box 1 through an air supply pipe 3.

[0031] A purification chamber 7 with an inner cavity that is connected to the inner cavity of the drying oven 1 is provided on one side. An exhaust fan 8 is provided on the side wall of the purification chamber 7, and the exhaust fan 8 connects the inner cavity of the purification chamber 7 with the external environment.

[0032] In the specific implementation process, the hot air blower 2 is set on the upper surface of the drying box 1. When the hot air blower 2 is started, hot air is blown from the top into the inner cavity of the drying box 1 through the air supply pipe 3, so that the hot air is blown onto the surface of the electrode sheet inside the drying box 1 to dry the coating layer.

[0033] Furthermore, while the hot air blower 2 is started to blow hot air, the first suction pipe 5 simultaneously draws air to promptly remove impurities that have fallen onto the surface of the collector. The air containing impurities can enter the interior of the filter box 6 through the first suction pipe 5. The filter box 6 can filter the impurities in the air to a certain extent, preventing impurities from being circulated into the drying chamber 1. This can minimize the possibility of impurities falling onto the surface of the collector and, under the action of hot air blowing, adhering to the undried slurry layer and drying together, thus adversely affecting the processing quality of the electrode sheet. Moreover, the air circulation transport method between the hot air blower 2, the air supply pipe 3, the first suction pipe 5, and the filter box 6 can recover some of the hot air, thereby saving energy.

[0034] By combining the purification chamber 7 and the exhaust fan 8, the exhaust fan 8 provides a continuous negative pressure suction force to the inside of the drying chamber 1 through the purification chamber 7, so that the gas discharged from the drying chamber 1 is purified through the inside of the purification chamber 7, thereby reducing the impact of exhaust gas on the environment and making this application more conducive to practical use. It should be noted that the forced exhaust method of forcibly extracting part of the gas generated inside the drying chamber 1 by the exhaust fan 8 improves the airflow rate and heat exchange efficiency inside the drying chamber, ensures effective filtration of impurities, and also effectively prevents hot air stagnation or backflow, avoiding the accumulation of high-temperature gas from adversely affecting the equipment or coating effect.

[0035] refer to Figure 2 The drying box 1 includes a first box body 101, and the air supply pipe 3 and the first suction pipe 5 both pass through the top of the first box body 101 and thus connect to the inner cavity of the first box body 101. A first inlet 102 is provided on one side of the first box body 101, and a first outlet 103 is provided on the other side of the first box body 101 in a position opposite to the first inlet 102. The first outlet 103 connects to the inner cavity of the purification box 7.

[0036] In the specific implementation process, the electrode sheet enters the inner cavity of the first chamber 101 through the first inlet 102, and hot air is blown onto the surface of the electrode sheet by the air supply pipe 3, thereby achieving the drying operation of the coating layer; combined with Figure 2 The electrode plate moves horizontally from right to left until it enters the inner cavity of the purification chamber 7 through the first outlet 103, completing the transport of the electrode plate within the inner cavity of the first chamber 101.

[0037] The filter box 6 includes a rectangular box 601 fixedly connected to the upper surface of the first box 101. The inner wall of the rectangular box 601 is coaxially sleeved with a filter plate 602. The connection ports of the hot air blower 2, the first suction pipe 5 and the rectangular box 601 are located on both sides of the filter plate 602. A cleaning door 603 is movably provided on one side of the rectangular box 601.

[0038] In the specific implementation process, a filter plate 602 is fitted into the inner cavity of the rectangular box 601. The filter plate 602 and the rectangular box 601 are arranged coaxially, and the inner cavity of the rectangular box 601 serves as a space to limit the installation position of the filter plate 602. In actual use, annular baffles can also be added to both sides of the filter plate 602 on the inner wall of the rectangular box 601 to further limit the installation position of the filter plate 602 in the inner cavity of the rectangular box 601, so as to adjust the proportion of the inner cavity space of the rectangular box 601 on both sides of the filter plate 602. The air passing through the rectangular box 601 is filtered by the convection of the filter plate 602.

[0039] Meanwhile, a cleaning door 603 is movably installed on one side of the rectangular box 601. The cleaning door 603 can be opened as needed to clean the filter plate 602, and the cleaning door 603 can be closed as needed to ensure the sealing of the inner cavity of the first box 101 and improve the convenience of filter plate 602 maintenance.

[0040] The purification box 7 includes a second box 701 fixedly connected to one side of the first box 101. A second inlet 702 connected to the first outlet 103 is opened on one side of the second box 701. A second outlet 703 arranged opposite to the second inlet 702 is opened on the other side of the second box 701. One end of the exhaust fan 8 is connected to the inner cavity of the second box 701.

[0041] The purification box 7 also includes a filter assembly 704. The filter assembly 704 is coaxially sleeved on the inner wall of the second box 701. The connection port of the exhaust fan 8 to the second box 701 and the second inlet 702 are located on both sides of the filter assembly 704.

[0042] In the specific implementation process, the second inlet 702 and the second outlet 703 are both axially arranged with the first outlet 103. The electrode sheet is removed from the inner cavity of the first housing 101 through the first outlet 103 and enters the inner cavity of the second housing 701 through the second inlet 702; combined with the attached... Figure 2 The electrode sheet moves horizontally from the second inlet 702 on the right to the second outlet 703 on the left until it is removed horizontally from the second outlet 703 into the inner cavity of the second housing 701, completing the transfer of the electrode sheet inside the second housing 701. When the exhaust fan 8 is started, the second inlet 702, in conjunction with the first outlet 103, can draw air from inside the first housing 101, and the drawn air can be purified to a certain extent by the filter assembly 704.

[0043] It should be noted that the filter assembly 704 includes one or more activated carbon plates arranged in an array. Correspondingly, multi-stage filter assemblies, such as high-efficiency particulate filters, activated carbon layers, or adsorption catalytic devices, can be provided as needed to adsorb or decompose harmful gases and particulate matter in the exhaust gas, thereby reducing the concentration of pollutants emitted and achieving compliance with emission standards.

[0044] The inner wall of the first housing 101 is connected to the wind baffle 10, and the connection ports of the air supply pipe 3, the first suction pipe 5 and the first housing 101 are located on both sides of the wind baffle 10.

[0045] In the specific implementation process, the baffle plate 10 separates the air supply pipe 3 and the first suction pipe 5, thereby reducing the amount of hot air directly sucked into the first box 101 by the first suction pipe 5 and increasing the amount of fresh air sucked into the outside by the first suction pipe 5 through the first inlet 102.

[0046] refer to Figure 3 One end of the first suction pipe 5 extends into the inner cavity of the first box 101, and the other end of the first suction pipe 5 is coaxially connected to the dust hood 4 located in the inner cavity of the first box 101. The cross-sectional area of ​​the dust hood 4 is larger than the cross-sectional area of ​​the first suction pipe 5.

[0047] In this embodiment, the dust extraction hood 4 is fixedly installed inside the drying chamber 1 and positioned above the conveying electrode sheet. The dust extraction hood 4 expands the absorption area of ​​the first suction pipe 5 and improves the dust extraction efficiency.

[0048] The first housing 101 has a perforated diffuser plate 11 in its inner cavity. The perforated diffuser plate 11, the wind baffle plate 10 and the inner wall of the first housing 101 form a first cavity and a second cavity. The air supply pipe 3 is connected to the first cavity, and the side wall of the perforated diffuser plate 11 has a through hole connecting the first cavity and the second cavity.

[0049] The perforated diffuser plate 11 is used to disperse hot air and improve the uniformity of the electrode drying process.

[0050] refer to Figure 4 The inner wall of the first housing 101 is provided with a rectangular connecting frame 12 located in the first cavity. The air supply pipe 3 is connected to the rectangular connecting frame 12. A square diffuser 9 is embedded in the side of the rectangular connecting frame 12 facing the perforated diffuser plate 11. Several guide holes facing the perforated diffuser plate 11 are opened on the side wall of the square diffuser 9. The several guide holes are radially distributed in a central manner. The square diffuser 9 is located above the perforated diffuser plate 11.

[0051] In the specific implementation process, the rectangular connecting frame 12 is used to limit the installation position of the square diffuser 9, and several guide holes are used to guide the airflow to form a radial flow, thereby dispersing the hot air towards the perforated diffuser plate 11, further improving the dispersion effect of hot air.

[0052] In addition, several rotating rollers 13 are rotatably connected inside the drying oven 1, and the side walls of the several rotating rollers 13 together form a bearing surface, which is connected to the first inlet 102 and the first outlet 103.

[0053] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "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, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] It should be understood that all terms used to indicate orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as a limitation of the present invention.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium battery coating oven, characterized in that, include: The drying box (1) has its inner cavity connected to the filter box (6) through the first suction pipe (5), and the output end of the filter box (6) is connected to the input end of the hot air blower (2). The output end of the hot air blower (2) is connected to the inner cavity of the drying box (1) through the air supply pipe (3). The drying box (1) has a purification box (7) on one side, which is connected to the inner cavity of the drying box (1). The purification box (7) has an exhaust fan (8) on its side wall, which connects the inner cavity of the purification box (7) to the external environment.

2. The lithium battery coating oven according to claim 1, characterized in that, The drying box (1) includes a first box body (101), the air supply pipe (3) and the first suction pipe (5) are both connected to the inner cavity of the first box body (101), a first inlet (102) is provided on one side of the first box body (101), and a first outlet (103) is provided on the other side of the first box body (101) in alignment with the first inlet (102), and the first outlet (103) is connected to the inner cavity of the purification box (7).

3. The lithium battery coating oven according to claim 2, characterized in that, The filter box (6) includes a rectangular box body (601), and a filter plate (602) is coaxially sleeved on the inner wall of the rectangular box body (601). The connection ports of the hot air blower (2), the first suction pipe (5) and the rectangular box body (601) are located on both sides of the filter plate (602). A cleaning door (603) is movably provided on one side of the rectangular box body (601).

4. The lithium battery coating oven according to claim 2, characterized in that, The purification box (7) includes a second box body (701), a second inlet (702) connected to the first outlet (103) is opened on one side of the second box body (701), a second outlet (703) arranged opposite to the second inlet (702) is opened on the other side of the second box body (701), and one end of the exhaust fan (8) is connected to the inner cavity of the second box body (701).

5. The lithium battery coating oven according to claim 4, characterized in that, The purification box (7) also includes a filter assembly (704), the filter assembly (704) is coaxially sleeved on the inner wall of the second box (701), and the connection port of the exhaust fan (8) to the second box (701) and the second inlet (702) are located on both sides of the filter assembly (704).

6. The lithium battery coating oven according to claim 5, characterized in that, The filter assembly (704) includes one or more activated carbon plates arranged in an array.

7. The lithium battery coating oven according to claim 6, characterized in that, The inner wall of the first housing (101) is connected to a baffle plate (10), and the connection ports of the air supply pipe (3), the first suction pipe (5) and the first housing (101) are located on both sides of the baffle plate (10).

8. The lithium battery coating oven according to claim 7, characterized in that, One end of the first suction tube (5) extends into the inner cavity of the first box (101), and the other end of the first suction tube (5) is coaxially connected to the dust hood (4) located in the inner cavity of the first box (101). The cross-sectional area of ​​the dust hood (4) is greater than the cross-sectional area of ​​the first suction tube (5).

9. The lithium battery coating oven according to claim 8, characterized in that, The inner cavity of the first housing (101) is provided with a perforated diffuser plate (11). The perforated diffuser plate (11), the baffle plate (10) and the inner wall of the first housing (101) form a first cavity and a second cavity. The air supply pipe (3) is connected to the first cavity, and the side wall of the perforated diffuser plate (11) is provided with a through hole connecting the first cavity and the second cavity.

10. The lithium battery coating oven according to claim 9, characterized in that, The inner wall of the first housing (101) is provided with a rectangular connecting frame (12) located in the first cavity. The air supply pipe (3) is connected to the rectangular connecting frame (12). The rectangular connecting frame (12) is embedded with a square diffuser (9) on the side facing the perforated diffuser plate (11). The side wall of the square diffuser (9) is provided with several guide holes facing the perforated diffuser plate (11).

11. The lithium battery coating oven according to any one of claims 2 to 10, characterized in that, The drying box (1) is rotatably connected to several rotating rollers (13), and the side walls of the several rotating rollers (13) together form a bearing surface, which is connected to the first inlet (102) and the first outlet (103).

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