Film forming apparatus and electrode production facility

Abstract

The utility model provides a film forming device and electrode production equipment, the film forming device comprises: two rollers, the rollers can controllably rotate around their own axes, a rolling seam for rolling electrode powder is arranged between the two rollers, the periphery of at least one roller is provided with a material bearing area, and the material bearing area is located on the upper surface of the corresponding roller; and the feeding unit is suitable for conveying electrode powder to the material bearing area so that the corresponding roller can bear the electrode powder, and the corresponding roller can convey the electrode powder to the rolling seam. According to the film forming device disclosed by the utility model, electrode powder can be uniformly conveyed to the rolling seam, the non-uniformity of the electrode powder can be avoided, the continuity and the film forming quality of an electrode film can be improved, and the feeding speed of the feeding unit is adjusted and matched with the rotating speed of the roller, so that the accumulation and bridging phenomena of the electrode powder can be effectively avoided; therefore, the continuity and the film forming quality of the electrode film can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of electrode production technology, and more specifically, to a film-forming apparatus and electrode production equipment. Background Technology

[0002] In the electrode production process, a film-forming device is typically used to roll dry electrode powder into electrode films. However, existing film-forming devices feed the powder directly into the roller gap by gravity. Since dry electrode powder contains binders and has poor flowability, the feeding of electrode powder is uneven when using the above feeding method. This can easily lead to the formation of arches in the roller gap, resulting in defects and holes in the electrode film, affecting its continuity and film quality. Utility Model Content

[0003] This invention provides a new technical solution for a film-forming device, which can at least solve the problem of uneven electrode powder feeding in existing film-forming devices.

[0004] This utility model also provides a new technical solution for electrode production equipment.

[0005] According to a first aspect of the present invention, a film-forming apparatus is provided, comprising: two rollers, the rollers being controllably rotatable about their own axes, a roller gap for roller pressing electrode powder between the two rollers, wherein at least one of the rollers has a material-bearing area on its outer periphery, and the material-bearing area is located on the upper surface of the corresponding roller; and a feeding unit adapted to convey electrode powder to the material-bearing area so that the corresponding roller receives the electrode powder, and the corresponding roller is capable of conveying the electrode powder to the roller gap.

[0006] Optionally, the two rolls are distributed in a horizontal direction.

[0007] Optionally, the two rolls are distributed vertically, and the two rolls include a lower roll and a higher roll, with the material-bearing area located on the upper surface of the lower roll.

[0008] Optionally, the radial dimension of the lower roll is larger than the radial dimension of the higher roll.

[0009] Optionally, the two rolls include a low roll and a high roll, the low roll and the high roll being partially offset in the vertical direction, and the material receiving area being located on the upper surface of the low roll and offset from the high roll in the vertical direction.

[0010] Optionally, in the horizontal direction, the material-bearing area is located on the side of the roll close to the roll gap.

[0011] Optionally, the discharge end of the feeding unit is located on the radial line of the roller in the vertical direction.

[0012] Optionally, the feeding unit is configured to feed material along the tangential direction of the roll.

[0013] Optionally, the lower surface of the outlet end of the feeding unit is in contact with the roller.

[0014] Optionally, the feeding unit is configured as a vibrating conveyor or a belt conveyor.

[0015] According to a second aspect of the present invention, an electrode production apparatus is provided, comprising the film-forming device described in any of the preceding claims.

[0016] According to the film-forming device of this utility model, by setting a material-bearing area on one side of the roll gap width direction on the outer periphery of the roll, and a feeding unit for conveying electrode powder to the material-bearing area, the electrode powder can be uniformly conveyed to the roll gap, which can avoid the problem of uneven electrode powder, improve the continuity of the electrode film and the film-forming quality. Furthermore, by adjusting and matching the feeding speed of the feeding unit with the rotation speed of the roll, the accumulation and bridging of electrode powder can be effectively avoided, thereby further improving the continuity of the electrode film and the film-forming quality, and ensuring the integrity and uniformity of the electrode film.

[0017] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of a film-forming apparatus according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a film-forming apparatus according to another embodiment of the present invention.

[0021] Figure Labels

[0022] 100. Film-forming apparatus;

[0023] a. Electrode powder; b. Electrode diaphragm;

[0024] 10. Feeding unit; 20. Rolls; 20a. Low-position rolls; 20b. High-position rolls. Detailed Implementation

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0026] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "multiple" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the 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 this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0029] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0030] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0032] The film-forming apparatus 100 according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] like Figure 1 and Figure 2 As shown, the film-forming apparatus 100 according to an embodiment of the present invention includes two rollers 20 and a feeding unit 10.

[0034] Specifically, the roller 20 is controllably rotatable about its own axis, and there is a roller gap between the two rollers 20 for rolling electrode powder a. At least one roller 20 has a material-bearing area on its outer periphery, and the material-bearing area is located on the upper surface of the corresponding roller 20. The feeding unit 10 is adapted to convey the electrode powder a to the material-bearing area so that the corresponding roller 20 receives the electrode powder a, and the corresponding roller 20 can convey the electrode powder a to the roller gap.

[0035] In other words, such as Figure 1 and Figure 2 As shown, the film-forming apparatus 100 according to an embodiment of the present invention mainly includes two rollers 20 and a feeding unit 10. The two rollers 20 are a first roller and a second roller, respectively. The first roller and the second roller are distributed radially apart, such that a roller pressing gap (i.e., a gap in the roller pressing electrode powder a) is formed between the first roller and the second roller. The first roller and the second roller are configured to be controllably rotated about their own axes, and the rotation directions of the first roller and the second roller are opposite. Specifically, the first roller and the second roller can be driven together, and the first roller or the second roller can be driven by a drive structure; or, the first roller and the second roller can be independently controlled. For example, the first roller and the second roller can be driven by a drive structure, which can be a motor. By driving the first roller or the second roller with the motor, the first roller and the second roller can rotate at a predetermined speed to roll the electrode powder a in the roller pressing gap into an electrode film b.

[0036] like Figure 1 and Figure 2 As shown, the outer periphery of the first roll and / or the second roll has a material-bearing area on one side in the roll gap width direction. In this embodiment, the outer periphery of the first roll has a material-bearing area on one side in the roll gap width direction, and the first roll includes an upper surface and a lower surface arranged opposite to each other in the vertical direction, with the material-bearing area located on the upper surface of the first roll.

[0037] like Figure 1 and Figure 2As shown, during use, the electrode powder a can be uniformly conveyed to the receiving area by the feeding unit 10. The first roller can receive the electrode powder a conveyed by the feeding unit 10, and through the friction between the first roller and the electrode powder a, as well as the rotation of the first roller, the electrode powder a can be uniformly conveyed to the roll pressing gap. Under the interaction of the first roller and the second roller, the electrode powder a can be rolled into an electrode film b. In this embodiment, by adjusting and matching the feeding speed of the feeding unit 10 with the rotation speed of the roller 20, the accumulation and bridging of the electrode powder a can be effectively avoided, the continuity and film quality of the electrode film b can be improved, and the integrity and uniformity of the electrode film b can be ensured.

[0038] Therefore, according to the film forming apparatus 100 provided in this embodiment, by setting a material receiving area on one side of the roll 20 gap width direction on the outer periphery of the roll 20, and a feeding unit 10 for conveying electrode powder a to the material receiving area, the electrode powder a can be uniformly conveyed to the roll gap, which can avoid the problem of uneven electrode powder a, improve the continuity and film forming quality of the electrode film b, and match the feeding speed of the feeding unit 10 with the rotation speed of the roll 20, the accumulation and bridging of electrode powder a can be effectively avoided, thereby further improving the continuity and film forming quality of the electrode film b, and ensuring the integrity and uniformity of the electrode film b.

[0039] In some specific embodiments of this utility model, the two rollers 20 are distributed in a horizontal direction.

[0040] In other words, such as Figure 2 As shown, the first and second rolls are at the same height and are spaced apart in the horizontal direction. The roll gap extends in the vertical direction, which facilitates film formation in the vertical direction and meets the film formation requirements in the vertical direction. It also allows a material-bearing area to be set on the outer periphery of either of the two rolls 20, and provides sufficient installation space for the feeding unit 10, which is convenient for the production and assembly of the film forming device 100.

[0041] According to one embodiment of the present invention, the two rollers 20 are distributed in a vertical direction, and the two rollers 20 include a low roller 20a and a high roller 20b, and the material bearing area is located on the upper surface of the low roller 20a.

[0042] Specifically, the first and second rolls are distributed vertically. The first roll is located below the second roll, forming a low-position roll 20a, and the second roll is located above the first roll, forming a high-position roll 20b. The roll gap extends horizontally, facilitating film formation in the horizontal direction and meeting the film formation requirements in the moisture direction. In this embodiment, the material-bearing area is located on the upper surface of the low-position roll 20a, thereby uniformly conveying the electrode powder a into the roll gap of the roller pressing electrode powder a.

[0043] like Figure 1 and Figure 2 As shown, in some optional examples of this utility model, the radial dimension of the first roll is the same as that of the second roll.

[0044] In this example, the first roll and the second roll can be interchangeable. The first roll and the second roll can be connected together by two gears of the same size. The structure is simple and easy to manufacture.

[0045] In some specific embodiments of this utility model, the radial dimension of the low-position roll 20a is greater than the radial dimension of the high-position roll 20b.

[0046] In other words, the radial dimension of the low-position roll 20a is d1, and the radial dimension of the high-position roll 20b is d2, where d1 > d2. This allows the high-position roll 20b to be offset from the material-bearing area in the vertical direction, thereby providing sufficient installation space for the feeding unit 10 and facilitating the production and assembly of the film-forming device 100.

[0047] In this embodiment, the lower-position roll 20a and the higher-position roll 20b can be connected together by a gear structure with different radial dimensions. It should be noted that the radial dimension of the gear structure must ensure that the linear velocities of the lower-position roll 20a and the higher-position roll 20b are the same, which will not be elaborated further in this embodiment.

[0048] According to one embodiment of the present invention, the two rolls 20 include a low roll 20a and a high roll 20b. The low roll 20a and the high roll 20b are partially offset in the vertical direction. The material receiving area is located on the upper surface of the low roll 20a and is offset from the high roll 20b in the vertical direction.

[0049] In other words, such as Figure 1 As shown, the first and second rolls are distributed along an inclined direction, thereby offsetting the first and second rolls in the vertical direction. In this embodiment, the height of the first roll is lower than the height of the second roll. The first roll is formed as a low-position roll 20a, and the second roll is formed as a high-position roll 20b. The receiving area can be located on the upper surface of the low-position roll 20a in the area offset from the high-position roll 20b in the vertical direction. This provides sufficient installation space for the feeding unit 10, ensuring the compactness of the film forming apparatus 100, facilitating the production and assembly of the film forming apparatus 100, and facilitating film forming in the inclined direction, thus meeting the film forming requirements in the inclined direction.

[0050] In some specific embodiments of this utility model, in the horizontal direction, the material-bearing area is located on the side of the roll 20 near the roll gap.

[0051] Specifically, the first roll and the second roll are distributed horizontally, or they are distributed inclinedly. The first roll is divided into a first side and a second side by a radial line in the vertical direction. The first side of the first roll is close to the roll gap, and the material-bearing area is located on the first side of the first roll. This can effectively prevent the electrode powder a from slipping off the side of the first roll away from the roll gap, thereby ensuring the reliability of the film-forming device 100.

[0052] According to one embodiment of the present invention, the discharge end of the feeding unit 10 is located on the radial line of the roller 20 in the vertical direction.

[0053] In other words, such as Figure 1 and Figure 2 As shown, the first and second rolls are distributed horizontally or inclined. The discharge end of the feeding unit 10 is located at the position corresponding to the highest point of the first roll, which can prevent the electrode powder a from slipping off the side of the first roll away from the roll gap, thereby ensuring the reliability of the film forming device 100 and facilitating the horizontal arrangement of the feeding unit 10.

[0054] In some specific embodiments of this utility model, the feeding unit 10 is configured to feed material along the tangential direction of the roll 20.

[0055] Specifically, such as Figure 1 and Figure 2 As shown, the discharge end of the feeding unit 10 is close to the roller gap, and the direction of the electrode powder a fed from the discharge end of the feeding unit 10 is consistent with the tangential direction of the first roller, which facilitates the first roller to uniformly transport the electrode powder a to the roller gap. In this embodiment, the power applied to the electrode powder a by the feeding unit 10 can be fully utilized, which can effectively prevent slippage between the electrode powder a and the first roller, thereby further improving the stability of the electrode powder a transport and the film quality.

[0056] According to one embodiment of the present invention, the lower surface of the outlet end of the feeding unit 10 is in contact with the roller 20.

[0057] In other words, such as Figure 1 and Figure 2 As shown, in order to ensure the uniformity of material distribution, the lower surface of the nozzle end of the feeding unit 10 can be attached to the upper surface of the first roller. This allows the first roller to immediately receive the electrode powder a conveyed by the feeding unit 10, thereby effectively avoiding the problem of uneven distribution of the electrode powder a during the receiving process, and ensuring the film formation quality and production efficiency of the film forming device 100.

[0058] In some specific embodiments of this utility model, the feeding unit 10 is configured as a vibrating conveyor or a belt conveyor.

[0059] Specifically, the feeding unit 10 can be a vibrating conveyor (e.g., a vibrating conveyor), which can uniformly transport the electrode powder a to the receiving area, ensuring the film formation quality and production efficiency of the film forming device 100. The feeding unit 10 can also be a belt conveyor (e.g., a belt conveyor), which has lower operating energy consumption and higher conveying efficiency, effectively reducing the production cost of the electrode.

[0060] In some optional embodiments of this utility model, the first roll and the second roll have the same axial dimension. Furthermore, along the axial direction of the first roll, the size of the discharge end of the feeding unit 10 is smaller than the size of the first roll, and the discharge end of the feeding unit 10 is spaced apart from both ends of the first roll, thereby preventing the electrode powder a from falling from both ends of the first roll.

[0061] When the film-forming apparatus 100 according to the embodiment of the present invention is in use, the first roller rotates counterclockwise and the second roller rotates clockwise. The linear speeds of the first roller and the second roller are the same. The feeding unit 10 is installed on the upper side of the first roller and uniformly feeds electrode powder a into the material receiving area. The upper surface of the first roller receives the electrode powder a, and the electrode powder a can be conveyed to the roller pressing gap under the rotation of the first roller. Then, under the action of the first roller and the second roller, the electrode powder a can be rolled into an electrode film b.

[0062] In summary, the film-forming apparatus 100 provided by this utility model, by setting a material-bearing area on one side of the roll 20 gap width direction on the outer periphery of the roll 20, and a feeding unit 10 for conveying electrode powder a to the material-bearing area, the electrode powder a can be uniformly conveyed to the roll gap, which can avoid the problem of uneven electrode powder a, improve the continuity and film quality of the electrode film b, and match the feeding speed of the feeding unit 10 with the rotation speed of the roll 20, it can effectively avoid the accumulation and bridging of electrode powder a, thereby further improving the continuity and film quality of the electrode film b, and ensuring the integrity and uniformity of the electrode film b.

[0063] An embodiment of this utility model also provides an electrode production apparatus, including the film-forming device 100 described in any of the above embodiments. Since the film-forming device 100 according to the embodiments of this utility model has the above-described technical effects, the electrode production apparatus according to the embodiments of this utility model also has corresponding technical effects, which will not be repeated in this embodiment.

[0064] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0065] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A film-forming apparatus, characterized in that, include: Two rollers (20) are capable of controlled rotation about their own axes, and a roller gap is provided between the two rollers (20) for rolling electrode powder (a). At least one of the rollers (20) has a material-bearing area on its outer periphery, and the material-bearing area is located on the upper surface of the corresponding roller (20); Feeding unit (10) is adapted to convey electrode powder (a) to the receiving area so that the corresponding roller (20) receives the electrode powder (a) and the corresponding roller (20) can convey the electrode powder (a) to the roller gap.

2. The film-forming apparatus according to claim 1, characterized in that, The two rollers (20) are distributed in the horizontal direction.

3. The film-forming apparatus according to claim 1, characterized in that, The two rolls (20) are distributed vertically, and the two rolls (20) include a low roll (20a) and a high roll (20b), with the material-bearing area located on the upper surface of the low roll (20a).

4. The film-forming apparatus according to claim 3, characterized in that, The radial dimension of the lower roll (20a) is greater than the radial dimension of the higher roll (20b).

5. The film-forming apparatus according to claim 1, characterized in that, The two rolls (20) include a low roll (20a) and a high roll (20b), the low roll (20a) and the high roll (20b) being partially offset in the vertical direction, the material receiving area being located on the upper surface of the low roll (20a) and offset from the high roll (20b) in the vertical direction.

6. The film-forming apparatus according to claim 2 or 5, characterized in that, In the horizontal direction, the material-bearing area is located on the side of the roll (20) near the roll gap.

7. The film-forming apparatus according to claim 2 or 5, characterized in that, The discharge end of the feeding unit (10) is located on the radial line of the roller (20) in the vertical direction.

8. The film-forming apparatus according to claim 1, characterized in that, The feeding unit (10) is configured to feed material along the tangential direction of the roll (20).

9. The film-forming apparatus according to claim 1, characterized in that, The lower surface of the outlet end of the feeding unit (10) is in contact with the roller (20).

10. The film-forming apparatus according to claim 1, characterized in that, The feeding unit (10) is configured as a vibrating conveyor or a belt conveyor.

11. An electrode manufacturing apparatus, characterized in that, The film-forming apparatus includes any one of claims 1 to 10.

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