An electrode sheet coating device

Abstract

The application discloses a kind of pole piece coating devices, including pole piece support roller, first adjusting roller, second adjusting roller, coating die and support roller angle adjusting mechanism, the first adjusting roller and second adjusting roller are arranged in the opposite sides of pole piece support roller, the coating die is set outside pole piece support roller, the coating die is supported to pole piece support roller foil coating slurry, the first adjusting roller and second adjusting roller adjust the parallelism of foil and pole piece support roller roll surface, the support roller angle adjusting mechanism adjusts the angle of pole piece support roller;One sector of the pole piece support roller is set towards coating die, and the support roller angle adjusting mechanism adjusts the sector of pole piece support roller towards coating die.The application is used for pole piece coating.

Description

Technical Field

[0001] This invention relates to the field of lithium battery production equipment technology, specifically to an electrode coating device. Background Technology

[0002] With the widespread use of new energy vehicles and other new energy equipment, lithium batteries are being used more and more. The electrode is the most important structure in a lithium battery. It is formed by coating a foil with a slurry, followed by baking and cutting. When coating the foil with the slurry, a rotating roller typically supports the foil and feeds it forward. The coating head then applies the slurry to the foil supported by the roller. However, the rotation of the roller causes axial and radial runout, resulting in instability in the distance and relative position between the roller and the coating head. This leads to uneven coating thickness, affecting the performance of the electrode and the lithium battery. For example, the patent document "CN201520610732.2 Coating Machine and Coating Device" describes a coating machine that uses a rotating roller to support the foil. The axial and radial runout caused by the roller's rotation leads to instability in the distance and relative position between the roller and the coating head, resulting in uneven coating thickness and affecting the performance of the electrode and the lithium battery. Summary of the Invention

[0003] The technical problem solved by this invention is that when coating electrode sheets, the foil material is supported by a rotating roller, which causes axial and radial runout during the rotation of the roller. This results in unstable spacing and relative position between the roller and the coating head, leading to uneven coating thickness when coating the foil material with slurry, thus affecting the performance of the electrode sheet and lithium battery. The invention provides an electrode sheet coating device that can solve this problem.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is: an electrode coating apparatus, comprising an electrode support roller, a first adjusting roller, a second adjusting roller, a coating die head, and a support roller angle adjustment mechanism. The first adjusting roller and the second adjusting roller are disposed on opposite sides of the electrode support roller. The coating die head is disposed outside the electrode support roller. The coating die head coats a foil material supported on the electrode support roller with a slurry. The first adjusting roller and the second adjusting roller adjust the parallelism between the foil material and the roller surface of the electrode support roller. The support roller angle adjustment mechanism adjusts the angle of the electrode support roller. One fan-shaped surface of the electrode support roller faces the coating die head, and the support roller angle adjustment mechanism adjusts the fan-shaped surface of the electrode support roller facing the coating die head.

[0005] Furthermore, the electrode support roller includes a support roller surface and a support roller shaft, with the support roller surface disposed around the support roller shaft; the support roller angle adjustment mechanism includes an upper roller shaft clamp, a lower roller shaft clamp, and a clamp locking bolt, with the support roller shaft clamped between the upper roller shaft clamp and the lower roller shaft clamp, and the clamp locking bolt fixing the upper roller shaft clamp and the lower roller shaft clamp together.

[0006] Furthermore, the support roller angle adjustment mechanism also includes a support roller angle adjustment knob, which is disposed on the support roller shaft.

[0007] Furthermore, the support roller angle adjustment mechanism also includes a scale and a support roller angle pointer. The scale is disposed on the upper roller shaft clamp or the lower roller shaft clamp, and the support roller angle pointer is disposed on the support roller shaft. The support roller angle pointer indicates the scale on the scale.

[0008] Furthermore, the support roller angle adjustment mechanism also includes a support roller bearing seat and a support pad, the support roller shaft is mounted on the support roller bearing seat, and the support roller bearing seat is mounted on the support pad.

[0009] Furthermore, both ends of the first and second adjusting rollers are provided with roller adjusting mechanisms, which adjust the positions of the first and second adjusting rollers. The roller adjusting mechanism includes a slide support, a slide, a roller bearing seat, a slide rod, and an adjusting screw. The slide rod and the adjusting screw are mounted on the slide support, the slide is slidably mounted on the slide rod, and the slide is screwed onto the adjusting screw. Both ends of the first and second adjusting rollers are respectively mounted on the slide through roller bearing seats.

[0010] Furthermore, the roller adjustment mechanism also includes a roller fixing screw, which is screwed onto the slide bracket. The slide fixing screw loosens or fixes the slide onto the slide bracket.

[0011] Furthermore, it also includes a traction mechanism that pulls the foil to move the coating slurry; the traction mechanism includes a traction main roller and a pressure roller, the pressure roller presses the foil onto the traction main roller, and the traction main roller rotates to drive the foil to move.

[0012] Furthermore, it also includes an eccentric adjusting roller and two magnetic rods, the two magnetic rods being disposed at the front end of the coating die head and respectively disposed on opposite sides of the foil moving path; the eccentric adjusting roller is disposed at the rear end of the coating die head.

[0013] Furthermore, it also includes a coating inspection mechanism, which is located at the rear end of the coating die head; the coating inspection mechanism includes a CCD camera and a CCD light source.

[0014] The beneficial effects achieved by this invention are mainly as follows: The first and second adjusting rollers are arranged on opposite sides of the electrode support roller. The first and second adjusting rollers adjust the parallelism between the foil L and the roller surface of the electrode support roller, so that the foil L can adhere to the roller surface of the electrode support roller, thereby ensuring uniform coating thickness when the foil is coated with slurry, which can guarantee the performance of the electrode and lithium battery. The support roller angle adjustment mechanism adjusts the angle of the electrode support roller, so the electrode support roller does not need to rotate during electrode coating, avoiding axial and radial runout caused by the rotation of the electrode support roller. The distance and relative position between the electrode support roller and the coating die head remain stable, which can further ensure uniform coating thickness when the foil is coated with slurry, and guarantee the performance of the electrode and lithium battery. Furthermore, when one section of the electrode support roller is damaged, it can be rotated so that other sections face the coating die head, using the other sections of the electrode support roller to support the foil, thereby making full use of the electrode support roller, extending the service life of the electrode support roller, and reducing the cost of electrode coating production. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the electrode coating device in an embodiment of the present invention (wall panel not shown);

[0016] Figure 2 This is a schematic diagram of the main structure of the electrode coating device in an embodiment of the present invention (wall panel not shown);

[0017] Figure 3 This is a schematic diagram of the installation structure of the electrode support roller, the first adjusting roller, the second adjusting roller, the coating die head, and the roller adjusting mechanism in the electrode coating device of this invention.

[0018] Figure 4 This is a schematic diagram of the installation structure of the support roller angle adjustment mechanism and the electrode support roller in an embodiment of the present invention;

[0019] Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle;

[0020] Figure 6 This is a schematic diagram of the installation structure of the roller adjustment mechanism and the first adjustment roller of the electrode coating device in an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the structure of the first adjusting roller adjusting mechanism in an embodiment of the present invention;

[0022] Figure 8 This is a schematic diagram of the installation structure of the roller adjustment mechanism and the second adjustment roller of the electrode coating device in an embodiment of the present invention;

[0023] Figure 9 This is a schematic diagram of the structure of the roller adjusting mechanism of the second adjusting roller in an embodiment of the present invention;

[0024] Figure 10 This is a schematic diagram of the coating detection mechanism of the electrode coating device in an embodiment of the present invention.

[0025] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, various embodiments of the present invention will be described below in conjunction with text and accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the present invention. That is, in some embodiments of the present invention, these practical details are not essential. Furthermore, for ease of understanding, some conventional structures and components will be illustrated in the drawings in a simple schematic manner.

[0027] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationships and movement of the components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly. The use of terms such as "comprising," "including," "having," and their variations is intended to include the elements listed after them and their equivalents, as well as other elements. Unless otherwise stated, terms such as "installed," "connected," "supported," and "linked," and their variations, are used in the broadest sense, including direct and indirect combination, connection, support, and linkage. Furthermore, the terms "connection" and "linking" are not limited to physical or mechanical connections or linkages.

[0028] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] Example 1

[0030] See Figures 1-10 An electrode coating apparatus is disclosed for applying a slurry during electrode production. The apparatus includes an electrode support roller 1, a first adjusting roller 2, a second adjusting roller 3, a coating die 4, and a support roller angle adjustment mechanism 5. The electrode support roller 1, the first adjusting roller 2, the second adjusting roller 3, the coating die 4, and the support roller angle adjustment mechanism 5 are all disposed between two opposing wall plates (not shown in the figure). The coating die 4 is positioned outside the electrode support roller 1, facing the electrode support roller 1. During operation, the foil L to be coated is supported on the electrode support roller 1, and the coating die 4 applies the slurry to the foil supported on the electrode support roller 1. The first adjusting roller 2 and the second adjusting roller 3 are positioned on opposite sides of the electrode support roller 1. The first adjusting roller 2 and the second adjusting roller 3 adjust the parallelism between the foil L and the roller surface of the electrode support roller 1, allowing the foil L to adhere to the roller surface of the electrode support roller 1. This ensures uniform coating thickness when the foil is coated with the slurry, guaranteeing the performance of the electrode and the lithium battery. The support roller angle adjusting mechanism 5 adjusts the angle of the electrode support roller 1. One fan-shaped portion of the electrode support roller 1 faces the coating die head 4, and the support roller angle adjusting mechanism 5 adjusts the fan-shaped portion of the electrode support roller 1 facing the coating die head 4. Therefore, the electrode support roller 1 does not need to rotate during electrode coating, avoiding axial and radial runout caused by the rotation of the electrode support roller 1. The distance and relative position between the electrode support roller 1 and the coating die head remain stable, which can ensure uniform coating thickness when coating the foil with slurry, and ensure the performance of the electrode and lithium battery. Furthermore, if one sector of the electrode support roller 1 is damaged, it can be rotated to face the other sectors towards the coating die head 4, using the other sectors of the electrode support roller 1 to support the foil, thereby making full use of the electrode support roller 1, extending the service life of the electrode support roller 1, and reducing the cost of electrode coating production.

[0031] See Figure 4 and Figure 5The electrode support roller 1 includes a support roller surface 11 and a support roller shaft 12. The support roller surface 11 is disposed around the support roller shaft 12. When the electrode support roller 1 supports the foil L, the foil L is supported by a section of the fan-shaped support roller surface 11. The support roller angle adjustment mechanism 5 includes an upper roller shaft clamp 51, a lower roller shaft clamp 52, and a clamp locking bolt 53. The support roller shaft 12 is clamped between the upper roller shaft clamp 51 and the lower roller shaft clamp 52. The clamp locking bolt 53 fixes the upper roller shaft clamp 51 and the lower roller shaft clamp 52 together. When it is necessary to adjust the angle of the electrode support roller 1, loosen the clamp locking bolt 53, rotate the electrode support roller 1 to adjust, and after adjustment, tighten the clamp locking bolt 53 to clamp and fix the electrode support roller 1 through the upper roller shaft clamp 51 and the lower roller shaft clamp 52. To facilitate the rotation of the electrode support roller 1, the support roller angle adjustment mechanism 5 also includes a support roller angle adjustment knob 54. The support roller angle adjustment knob 54 is set on the support roller shaft 12. When it is necessary to rotate and adjust the angle of the electrode support roller 1, the support roller angle adjustment knob 54 can be rotated.

[0032] See Figure 4 and Figure 5 To better control the rotation angle of the electrode support roller 1 during adjustment, the support roller angle adjustment mechanism 5 further includes a scale 55 and a support roller angle pointer 56. The scale 55 is mounted on the upper roller shaft clamp 51 or the lower roller shaft clamp 52, and the support roller angle pointer 56 is mounted on the support roller shaft 12. The support roller angle pointer 56 indicates the scale on the scale 55. When adjusting the angle of the electrode support roller 1, the support roller angle adjustment knob 54 is rotated, and the support roller angle pointer 56 rotates with the support roller shaft 12. The scale indicated by the support roller angle pointer 56 on the scale 55 confirms whether the electrode support roller 1 has rotated to the set angle. The dial 55 is set to 360°. Each time the angle of the electrode support roller 1 is adjusted, it rotates by 10°, thereby dividing the support roller surface 11 of the electrode support roller 1 into thirty-six sectors. When one sector is worn or otherwise abnormal, it is rotated to the next sector for use. The thirty-six sectors rotate in sequence to support the foil L, that is, the electrode support roller 1 can be used thirty-six times, which can extend the service life of the electrode support roller 1, make full use of the electrode support roller 1, and reduce the cost of electrode coating production.

[0033] See Figure 4 and Figure 5 The support roller angle adjustment mechanism 5 further includes a support roller bearing seat 57 and a support pad 58. The support roller shaft 12 is mounted on the support roller bearing seat 57, the support roller bearing seat 57 is mounted on the support pad 58, and the support pad 58 is mounted on the wall panel. The support roller bearing seat 57 reduces friction when the electrode support roller 1 rotates to adjust its angle, and the support pad 58 facilitates mounting the electrode support roller 1 on the wall panel.

[0034] See Figures 6-9 Both ends of the first adjusting roller 2 and the second adjusting roller 3 are provided with roller adjusting mechanisms 6. The roller adjusting mechanisms 6 adjust the positions of the first adjusting roller 2 and the second adjusting roller, thereby adjusting the parallelism between the foil L and the roller surface of the electrode support roller 1 through the first adjusting roller 2 and the second adjusting roller 3. The roller adjusting mechanism 6 includes a slide bracket 61, a slide 62, a roller bearing seat 63, a slide rod 64, and an adjusting screw 65. The slide rod 64 and the adjusting screw 65 are mounted on the slide bracket 61. The slide 62 is slidably mounted on the slide rod 64 and screwed onto the adjusting screw 65. The first adjusting roller 2 and the second adjusting roller 3 are respectively mounted on a roller adjusting mechanism 6 at both ends and are mounted on the slide 62 through the roller bearing seat 63. During operation, by adjusting the knob 67 to rotate the adjusting screw 65, the adjusting screw 65 drives the slide table 62 to slide on the slide table bracket 61. One end of the first adjusting roller 2 or one end of the second adjusting roller 3, which is installed on the roller bearing seat 63 of the slide table 62, moves with the slide table 62, thereby adjusting the parallelism between the foil L and the roller surface of the electrode support roller 1.

[0035] See Figures 6-9 The roller adjustment mechanism 6 further includes a roller fixing screw 66, which is screwed onto the slide bracket 61. The slide fixing screw 66 loosens or fixes the slide 62 onto the slide bracket 61. When it is necessary to adjust the position of one end of the first adjusting roller 2 or one end of the second adjusting roller 3, the slide fixing screw 66 is loosened; when it is not necessary to adjust the position of one end of the first adjusting roller 2 or one end of the second adjusting roller 3, the slide fixing screw 66 is locked onto the slide bracket 61. In this embodiment, the adjusting screws 65 of the roller adjustment mechanism 6 at both ends of the first adjusting roller 2 are lengthened.

[0036] See Figures 1-10 In this embodiment, when the electrode coating apparatus is working, the foil L passes sequentially through the first adjusting roller 2, the electrode support roller 1, and the second adjusting roller 3. The electrode support roller 1 supports the foil L, and the coating die 4 applies slurry to the foil L. The roller adjusting mechanism 6 drives one end of the first adjusting roller 2 and the second adjusting roller 3 to move their positions to adjust the parallelism between the foil L and the roller surface of the electrode support roller 1. When one section of the roller surface wears, the support roller angle adjusting mechanism 5 adjusts the electrode support roller 1 so that it faces the coating die 4, and another section of the roller surface faces the coating die 4 to support the foil.

[0037] Example 2

[0038] See Figures 1-10 The electrode coating device in this embodiment is the same as that in Embodiment 1, and the electrode coating device is further improved based on Embodiment 1. For the similarities between this embodiment and Embodiment 1, please refer to Embodiment 1. The improvements are further explained below.

[0039] See Figure 1 and Figure 2 The electrode coating apparatus also includes a traction mechanism 7, which is located at the front end of the first adjusting roller 2. The traction mechanism 7 pulls the foil L to move the coating slurry. The traction mechanism 7 includes a traction main roller 71 and a pressure roller 72. The pressure roller 72 presses the foil onto the traction main roller 71, and the traction main roller 71 rotates to drive the foil to move. This allows the foil L to be moved to convey the coating slurry forward.

[0040] See Figure 1 and Figure 2 It also includes an eccentric adjusting roller 81 and two magnetic rods 82. The two magnetic rods 82 are disposed at the front end of the coating die head 4 and are respectively disposed on opposite sides of the moving path of the foil L, removing impurities such as iron from the foil L before the slurry is applied. The eccentric adjusting roller 81 is disposed at the rear end of the coating die head 4.

[0041] Example 3

[0042] See Figures 1-10 The electrode coating device in this embodiment is the same as that in Embodiment 1, and the electrode coating device is further improved based on Embodiment 1. For the similarities between this embodiment and Embodiment 1, please refer to Embodiment 1. The improvements are further explained below.

[0043] See Figure 1 , 2 The coating and 10 also include a coating inspection mechanism 9, which is located at the rear end of the coating die head 4. The coating inspection mechanism 9 includes a CCD camera 91 and a CCD light source 92. The coating inspection mechanism 9 inspects the foil L after coating with slurry. During inspection, the CCD light source 92 illuminates the foil L after coating with slurry, and the CCD camera 91 takes a picture to detect the foil L after coating with slurry through the image.

[0044] See Figure 1 and 2 Multiple rollers 10 are provided on the moving path of the foil L to support the foil.

[0045] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electrode coating apparatus, characterized in that: The device includes an electrode support roller (1), a first adjusting roller (2), a second adjusting roller (3), a coating die (4), and a support roller angle adjustment mechanism (5). The first adjusting roller (2) and the second adjusting roller (3) are located on opposite sides of the electrode support roller (1). The coating die (4) is located outside the electrode support roller (1). The coating die (4) coats the foil material supported on the electrode support roller (1) with slurry. The first adjusting roller (2) and the second adjusting roller (3) adjust the parallelism between the foil material and the roller surface of the electrode support roller (1). The support roller angle adjustment mechanism (5) adjusts the angle of the electrode support roller (1). One fan-shaped surface of the electrode support roller (1) faces the coating die (4). The support roller angle adjustment mechanism (5) adjusts the fan-shaped surface of the electrode support roller (1) facing the coating die (4). The electrode support roller (1) includes a support roller surface (11) and a support roller shaft (12), the support roller surface (11) being disposed around the support roller shaft (12); the support roller angle adjustment mechanism (5) includes an upper roller shaft clamp (51), a lower roller shaft clamp (52) and a clamp locking bolt (53), the support roller shaft (12) being clamped between the upper roller shaft clamp (51) and the lower roller shaft clamp (52), and the clamp locking bolt (53) fixing the upper roller shaft clamp (51) and the lower roller shaft clamp (52) together; Both ends of the first adjusting roller (2) and the second adjusting roller (3) are provided with roller adjusting mechanisms (6). The roller adjusting mechanisms (6) adjust the positions of the first adjusting roller (2) and the second adjusting roller (3). The roller adjusting mechanism (6) includes a slide table bracket (61), a slide table (62), a roller bearing seat (63), a slide rod (64), and an adjusting screw (65). The slide rod (64) and the adjusting screw (65) are arranged on the slide table bracket (61). The slide table (62) is slidably arranged on the slide rod (64), and the slide table (62) is screwed onto the adjusting screw (65). Both ends of the first adjusting roller (2) and the second adjusting roller (3) are respectively mounted on the slide table (62) through the roller bearing seat (63).

2. The electrode coating apparatus according to claim 1, characterized in that: The support roller angle adjustment mechanism (5) further includes a support roller angle adjustment knob (54), which is located on the support roller shaft (12).

3. The electrode coating apparatus according to claim 2, characterized in that: The support roller angle adjustment mechanism (5) further includes a scale (55) and a support roller angle pointer (56). The scale (55) is set on the upper roller shaft clamp (51) or the lower roller shaft clamp (52). The support roller angle pointer (56) is set on the support roller shaft (12). The support roller angle pointer (56) indicates the scale on the scale (55).

4. The electrode coating apparatus according to claim 3, characterized in that: The support roller angle adjustment mechanism (5) further includes a support roller bearing seat (57) and a support pad (58). The support roller shaft (12) is disposed on the support roller bearing seat (57), and the support roller bearing seat (57) is mounted on the support pad (58).

5. The electrode coating apparatus according to claim 1, characterized in that: The roller adjustment mechanism (6) further includes a slide table fixing screw (66), which is screwed onto the slide table bracket (61). The slide table fixing screw (66) loosens or fixes the slide table (62) onto the slide table bracket (61).

6. The electrode coating apparatus according to claim 1, characterized in that: It also includes a traction mechanism (7), which pulls the foil to move the coating slurry; the traction mechanism (7) includes a traction main roller (71) and a pressure roller (72), the pressure roller (72) presses the foil onto the traction main roller (71), and the traction main roller (71) rotates to drive the foil to move.

7. The electrode coating apparatus according to claim 1, characterized in that: It also includes an eccentric adjustment roller (81) and two magnetic rods (82), the two magnetic rods (82) are disposed at the front end of the coating die (4) and respectively disposed on opposite sides of the foil moving path; the eccentric adjustment roller (81) is disposed at the rear end of the coating die (4).

8. The electrode coating apparatus according to claim 1, characterized in that: It also includes a coating inspection mechanism (9), which is located at the rear end of the coating die head (4); the coating inspection mechanism (9) includes a CCD camera (91) and a CCD light source (92).

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