Roller coating device and battery manufacturing system

Abstract

The utility model discloses a roller coating device, including stock bin and coating roller, the stock bin is used for holding the slurry to be coated, the stock bin is provided with the discharge port, the coating roller is installed at the discharge port and is rotatingly connected with the stock bin, the coating roller includes the main part and the abutting part, the main part is used for coating the slurry on the base material, and the abutting part is used for abutting against the base material. The abutting part is installed on the main body part in a telescopic mode. When the coating roller rotates, the abutting part shrinks to be away from the stock bin, and when the coating roller rotates to a preset number of turns, the abutting part extends out of the main body part to abut against the stock bin. According to the utility model, whether the coating roller rotates to a set number of coating turns or not can be accurately and quickly judged, and the length precision of a coated coating is improved. The utility model also discloses a battery manufacturing system.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a roller coating device and a battery manufacturing system. Background Art

[0002] In the coating process of positive and negative electrode materials of batteries, the coating roller is usually set to rotate a specific number of times to ensure that a specific length of coating is applied to the substrate. However, in actual operation, it is difficult to quickly and accurately determine whether the coating roller actually rotates the preset number of times, resulting in a change in the length of the slurry coating formed by coating on the surface of the substrate, resulting in an error beyond the error range with the set coating length, affecting the quality of the battery. Utility Model Content

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a roller coating device and a battery manufacturing system, which can accurately and quickly determine whether the coating roller has rotated to the set number of coating circles, thereby improving the length accuracy of the coating layer.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A roller coating device comprises a silo and a coating roller, wherein the silo is used to hold slurry to be coated, and the silo is provided with a discharge port, and the coating roller is installed at the discharge port and is rotatably connected to the silo, and the coating roller comprises a main body and an abutment portion, wherein the main body is used to coat the slurry on a substrate, and the abutment portion is telescopically installed on the main body; when the coating roller rotates, the abutment portion contracts away from the silo, and when the coating roller rotates to a preset number of turns, the abutment portion extends out of the main body and abuts against the silo.

[0006] In one embodiment, along the rotation direction of the coating roller, the coating roller abuts against the material bin via the downstream side of the abutting portion.

[0007] In one embodiment, the number of the abutting portions is two, and the two abutting portions are respectively arranged at two ends of the main body along the axial direction of the coating roller.

[0008] In one embodiment, along the axial direction of the coating roller, at least one end of the main body is provided with a plurality of abutment portions, and the plurality of abutment portions are arranged in an array along the circumferential direction of the coating roller.

[0009] In one embodiment, the angle between two adjacent abutment portions is θ, and the angle between the opposite sides of the silo along the coating direction of the roller coating device is δ, wherein δ=nθ, and n is a positive integer; when the coating roller rotates to a preset number of circles, along the coating direction of the roller coating device, the two abutment portions located on the opposite sides of the silo both extend out of the main body and abut against the silo.

[0010] In one embodiment, the number of the abutting portions is d, wherein 2<d<16, and d is an integer.

[0011] In one embodiment, the preset number of rotations of the coating roller is a, and the actual number of rotations of the coating roller is b. When 0<ab<1, the abutment portion corresponding to the preset number of rotations extends out of the main body to abut against the silo.

[0012] In one embodiment, along the coating direction of the roller coating device, the central angle formed between the upstream side of the silo and the lowest point of contact between the coating roller and the substrate is α, and the central angle formed between the upstream side of the silo and the abutment portion corresponding to the preset number of turns is β. When 0<ab<1 and β<α, the abutment portion corresponding to the preset number of turns extends out of the main body.

[0013] In one embodiment, along the coating direction of the roller coating device, the material bin includes a first baffle and a second baffle arranged opposite to each other, and when the coating roller rotates to a preset number of turns, the abutment portion located at at least one end of the main body abuts against the first baffle, or the two abutment portions located at at least one end of the main body abut against the first baffle and the second baffle respectively.

[0014] In one embodiment, a card slot is provided on the main body, and the abutting portion is a card plate, and the card plate is telescopically installed in the card slot.

[0015] In one embodiment, the roller coating device further comprises a switch, and the switch is arranged at the abutment point between the abutment portion and the material bin.

[0016] In one embodiment, one end of the switch is embedded in the abutting portion or the material bin and elastically connected to the abutting portion or the material bin, and the other end of the switch protrudes out of the abutting portion or the material bin. When the abutting portion abuts against the material bin, the switch is forced to retract and become flush with the surface of the abutting portion or the material bin.

[0017] The utility model also provides a battery manufacturing system, comprising the roller coating device as described above.

[0018] The beneficial effect of the utility model is that by arranging a movable abutment portion, when the coating roller rotates, the abutment portion shrinks away from the material bin and does not interfere with the normal rotation of the coating roller. When the coating roller rotates to a preset number of turns, the abutment portion extends out of the main body and abuts against the material bin, thereby realizing rapid knowledge of whether the coating roller has completed the preset number of rotational coating turns, facilitating accurate and quick acquisition of the signal that the coating roller has rotated to the right position for coating, and improving the length accuracy of the coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a roller coating device according to an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the roller coating device during coating;

[0022] Figure 3 yes Figure 2 The main view without the heating resistor;

[0023] Figure 4 It is a schematic diagram of the battery manufacturing system.

[0024] In the figure: 1. roller coating device; 11. silo; 111. discharge port; 112. first baffle; 113. second baffle; 114. side baffle; 12. coating roller; 121. abutment portion; 1211. downstream side; 122. main body; 1221. card slot; 123. heating resistor; 2. solvent volatilization device; 3. compaction device; 31. compaction upper portion; 32. compaction lower portion; 4. interface treatment device; 5. secondary roller coating device; 6. substrate; 7. coating. DETAILED DESCRIPTION

[0025] The following will describe in detail a specific embodiment of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0028] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0029] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0030] The utility model provides a roller coating device 1, such as Figure 1 and Figure 2As shown, it includes a silo 11 and a coating roller 12. The silo 11 is used to contain the slurry to be coated. The silo 11 is provided with a discharge port 111. The coating roller 12 is installed at the discharge port 111 and is rotatably connected to the silo 11. The coating roller 12 includes a main body 122 and an abutment portion 121. The main body 122 is used to coat the slurry on the substrate 6. The abutment portion 121 is telescopically installed on the main body 122; when the coating roller 12 rotates, the abutment portion 121 shrinks away from the silo 11. When the coating roller 12 rotates to a preset number of circles, the abutment portion 121 extends out of the main body 122 and abuts against the silo 11. Specifically, during the coating process, when the roller coating device 1 moves along the coating direction X1 for coating, the coating roller 12 rotates while moving along the coating direction X1 for coating, and the rotation direction S is the rotation direction of the coating roller 12. The slurry to be coated contained in the silo 11 is discharged through the discharge port 111. After being discharged, the slurry contacts the coating roller 12. The main body 122 is used to coat the surface of the substrate 6 with the slurry through the rotation of the coating roller 12, thereby forming a coating 7. The utility model provides a movable abutment 121, so that when the coating roller 12 rotates, the abutment 121 shrinks away from the silo 11, and does not interfere with the normal rotation of the coating roller 12. When the coating roller 12 rotates to a preset number of turns, the abutment 121 extends out of the main body 122 and abuts against the silo 11, so that it is possible to quickly know whether the coating roller 12 has completed the preset number of rotations, and it is convenient to accurately and quickly obtain the signal that the coating roller 12 has rotated to the right position for coating, thereby improving the length accuracy of the coating 7.

[0031] In this embodiment, the silo 11 can be set as a bucket-shaped structure, so that the slurry flows out of the discharge port 111 along the side wall of the bucket that gradually shrinks from top to bottom, so as to reduce the residual amount of slurry in the silo 11. The abutment portion 121 can be extended and retracted along the radial direction or axial direction A of the coating roller 12. When the coating roller 12 rotates normally, the abutment portion 121 shrinks away from the silo 11, and the abutment portion 121 can shrink along the radial direction close to the central axis direction of the coating roller 12 to be away from the silo 11, or the abutment portion 121 can shrink along the axial direction A of the coating roller 12 to the end away from the silo 11, so that the abutment portion 121 does not interfere with the rotation of the coating roller 12; when the coating roller 12 rotates to a preset number of turns, the abutment portion 121 can extend along the radial direction or axial direction A of the coating roller 12, so that the abutment portion 121 abuts against the silo 11, and accurately obtains the signal that the coating roller 12 rotates to the coating position. Among them, it is preferred that the abutment portion 121 is extended and retracted along the radial direction of the coating roller 12, and the abutment portion 121 can be completely retracted into the main body 122 to avoid the abutment portion 121 being partially exposed outside the main body 122 when it is extended and retracted along the axial direction A of the coating roller 12, and the coating roller 12 may contact and scratch the substrate 6 during rotation.

[0032] As an implementation method, Figure 3As shown, along the rotation direction S of the coating roller 12, the coating roller 12 abuts against the silo 11 through the downstream side 1211 of the abutting portion 121. Specifically, the rotation direction S of the coating roller 12 is the direction from the coated portion of the substrate 6 to the uncoated portion, and in the rotation direction S, the coating roller 12 abuts against the silo 11 through the downstream side 1211 of the abutting portion 121. Thus, the coating roller 12 can be prevented from excessive rotation.

[0033] As an embodiment, the number of the abutting portions 121 is two, and the two abutting portions 121 are respectively arranged at the two ends of the main body 122 along the axial direction A of the coating roller 12. The two ends of the coating roller 12 abut against the silo 11 through the abutting portions 121, and the force is balanced, so as to avoid uneven force on one end during long-term coating, resulting in the coating position of the coating roller 12 being offset, which affects the normal coating of the substrate 6.

[0034] As an implementation method, Figure 1 As shown, along the axial direction A of the coating roller 12, at least one end of the main body 122 is provided with a plurality of abutment portions 121, and the plurality of abutment portions 121 are arranged in an array along the circumferential direction C of the coating roller 12. By providing a plurality of abutment portions 121, the number of revolutions of the coating roller 12 can be set to be not an integer, which is more conducive to flexibly setting the coating length. Among them, the circumferential direction C is the rotation direction S of the coating roller 12.

[0035] As an implementation method, Figure 3 As shown, the angle between two adjacent abutting portions 121 is θ, and the angle between the two opposite sides of the silo 11 along the coating direction X1 of the roller coating device 1 is δ, where δ=nθ, and n is a positive integer; when the coating roller 12 rotates to a preset number of turns, along the coating direction X1 of the roller coating device 1, the two abutting portions 121 located on the opposite sides of the silo 11 both extend out of the main body 122 and abut against the silo 11. Specifically, along the coating direction X1 of the roller coating device 1, when the abutting portion 121 located on the upstream side abuts against the silo 11, the adjacent abutting portion 121 located downstream of the abutting portion 121 can extend and abut against the silo 11, and the two abutting portions 121 jointly prevent the coating roller 12 from rotating relative to the silo 11, so as to relatively lock the silo 11.

[0036] As an embodiment, the number of the abutment portions 121 is d, wherein 2<d<16, and d is an integer. For example, when d=3, the angle θ between two adjacent abutment portions 121 is 120°, and according to δ=nθ, when n is 1, the angle δ between the two opposite sides of the silo 11 is 120°; or, when d=6, the angle θ between two adjacent abutment portions 121 is 60°, and when n is 1 or 2, the angle δ between the two opposite sides of the silo 11 can be set to either 60° or 120°.

[0037] As an embodiment, the preset number of revolutions of the coating roller 12 is a, and the actual number of revolutions of the coating roller 12 is b. When 0<ab<1, the abutment portion 121 corresponding to the preset number of revolutions extends out of the main body 122 to wait for abutment with the silo 11, that is, the abutment portion 121 is extended only when the coating roller 12 rotates to the last revolution, thereby preventing the abutment portion 121 from extending in advance to interfere with the rotation of the coating roller 12.

[0038] As an implementation method, Figure 3 As shown, along the coating direction X1 of the roller coating device 1, the central angle formed between the upstream side of the silo 11 and the lowest point where the coating roller 12 and the substrate 6 contact is α, and the central angle formed between the upstream side of the silo 11 and the abutment portion 121 corresponding to the preset number of turns is β. When 0<ab<1 and β<α, the abutment portion 121 corresponding to the preset number of turns extends out of the main body 122. In this way, when 0<ab<1, but the abutment portion 121 corresponding to the preset number of turns a still needs to contact the substrate 6 before extending, it is avoided that the abutment portion 121 extends too early to hinder the rotation of the coating roller 12, and contacts the substrate 6 to cause damage to the substrate 6; that is, the coating roller 12 is extended only after the lowest point of contact with the substrate 6 is rotated, so as to avoid scratching the substrate 6.

[0039] As an implementation method, Figure 1 and Figure 3 As shown, along the coating direction X1 of the roller coating device 1, the silo 11 includes a first baffle 112 and a second baffle 113 arranged opposite to each other. When the coating roller 12 rotates to a preset number of circles, the abutment portion 121 located at at least one end of the main body 122 abuts against the first baffle 112 to prevent the coating roller 12 from excessively rotating; or the two abutment portions 121 located at at least one end of the main body 122 abut against the first baffle 112 and the second baffle 113 respectively, and the two abutment portions 121 jointly prevent the coating roller 12 from rotating relative to the silo 11, so as to relatively lock the silo 11.

[0040] As an implementation method, Figure 1 As shown, a card slot 1221 is provided on the main body 122 , and the abutting portion 121 is a card plate, which can be telescopically installed in the card slot 1221 .

[0041] As an embodiment, the roller coating device 1 further includes a switch (not shown), which is disposed at the abutment between the abutment portion 121 and the material bin 11. Specifically, the switch is disposed on the abutment portion 121 at a position abutting against the material bin 11; or, the switch is disposed on the material bin 11 at a position abutting against the abutment portion 121, and the switch is disposed on the first baffle plate 112 or the second baffle plate 113 capable of abutting against the abutment portion 121. When the abutment portion 121 abuts against the material bin 11, the switch is pressed and a signal is sent, and the roller coating device 1 completes coating.

[0042] As an embodiment, one end of the switch is disposed on the abutment portion 121 or the silo 11 and is elastically connected to the abutment portion 121 or the silo 11. A spring or a spring sheet may be disposed at the connection between the switch and the abutment portion 121 or the silo 11. The other end of the switch protrudes from the abutment portion 121 or the silo 11. When the abutment portion 121 abuts against the silo 11, the switch is forced to retract and become flush with the surface of the abutment portion 121 or the silo 11, thereby preventing the switch from obstructing the actual abutment. The switch is a contact switch, and the contact switch includes a sensor and a controller. When the abutment portion 121 abuts against the silo 11, the sensor contacts the surface of the abutment portion 121 or the silo 11, generates a corresponding electrical signal, and transmits it to the controller. The controller sends a signal to cut off the connection with the power supply, and the roller coating device 1 stops working, completing the coating process. As an embodiment, Figure 1 and Figure 2 As shown, a heating resistor 123 is provided in the coating roller 12. The heating resistor 123 is used to heat the liquid slurry in the silo 11 so that the liquid slurry is coated on the substrate 6 more evenly, or to melt the solid material in the silo 11, such as a solid electrolyte, so that the solid material is melted and evenly coated on the substrate 6.

[0043] The utility model provides a movable abutment portion 121, so that when the coating roller 12 rotates, the abutment portion 121 shrinks away from the silo 11 and does not interfere with the normal rotation of the coating roller 12. When the coating roller 12 rotates to a preset number of turns, the abutment portion 121 extends out of the main body 122 and abuts against the silo 11, thereby realizing rapid knowledge of whether the coating roller 12 has completed the preset number of rotational coatings, facilitating accurate and quick acquisition of the signal that the coating roller 12 has rotated to the right position for coating, and improving the length accuracy of the coating layer 7.

[0044] The utility model also provides a battery manufacturing system, which can be a solid-state battery manufacturing system or a solid-state battery 3D printing system. Figure 4 As shown, it comprises the roller coating device 1 as described above.

[0045] As an implementation method, Figure 4 As shown, along the coating direction X1, the battery manufacturing system further includes a solvent volatilization device 2, a compaction device 3, an interface treatment device 4, and a secondary roller coating device 5 which are located downstream of the roller coating device 1 and are arranged in sequence.

[0046] As an embodiment, the solvent volatilization device 2 is any one of an infrared heating device, an electric heating device and a laser heat treatment device.

[0047] As an implementation manner, the compacting device 3 includes a compacting upper part 31 and a compacting lower part 32 , wherein the compacting upper part 31 is a compacting roller or a compacting plate, and the compacting lower part 32 is a compacting roller or a compacting plate.

[0048] As an embodiment, when the compacting upper part 31 and the compacting lower part 32 of the compacting device 3 are both compacting rollers, the lower roller diameter D1 ≥ the upper roller diameter D2 . Thus, the coating 7 is not prone to wrinkles and breaks.

[0049] As an embodiment, the compacting roller and / or the compacting plate comprises a heating module, and the heating temperature range of the heating module is 25°C-150°C.

[0050] As an embodiment, the interface processing device 4 includes one or more of an infrared light heating processing device, a plasma processing device, and a laser processing device.

[0051] As an embodiment, the secondary roller coating device 5 has the same configuration as the roller coating device 1 and is used to further coat the positive electrode slurry, the negative electrode slurry or the electrolyte slurry to obtain a solid-state battery through multi-layer step-by-step coating.

[0052] The utility model also provides a method for printing a solid-state battery using the battery manufacturing system, comprising:

[0053] Step 1: Control the roller coating device 1 to move above the substrate 6 to apply the coating 7 on the substrate 6;

[0054] Step 2: Move the substrate 6, and the substrate 6 passes through the solvent volatilization device 2, the compaction device 3, the interface treatment device 4, and the secondary roller coating device 5 in the coating direction X1. Using 3D printing technology, through roller coating, solvent volatilization, compaction, interface treatment and other steps, the solid-solid interface inside and between the pole pieces is optimized, and through repeated coating 7 and interface treatment, a solid-state battery with low interface impedance is formed.

[0055] As an embodiment, the method further comprises: before step one, adding the slurry to be coated into the silo 11 of the roller coating device 1.

[0056] As an embodiment, the step 1 includes: the roller coating device 1 moves along a coating direction X1 to perform coating, and after coating is completed, moves along a direction X2 opposite to the coating direction X1 to a coating starting point.

[0057] As an embodiment, step one includes: before coating, setting the total number of coating turns of the coating roller 12 to a, and the actual number of turns of the coating roller 12 to b, and when 0<ab<1, controlling the corresponding abutment portion 121 to extend out from the outer surface of the main body 122 to abut against the silo 11.

[0058] As an embodiment, along the coating direction X1 of the roller coating device 1, the central angle formed between the upstream side of the silo 11 and the lowest point of contact between the coating roller 12 and the substrate 6 is α, and the central angle formed between the upstream side of the silo 11 and the abutment 121 corresponding to the preset number of turns is β. When 0<ab<1 and β<α, the abutment 121 corresponding to the preset number of turns extends out of the main body 122.

[0059] As an embodiment, the step 2 includes: when the substrate 6 passes through the solvent volatilization device 2, the solvent volatilization device 2 heats the coating 7 on the substrate 6 by infrared heating, electric heating or laser heating, so that the solvent in the slurry volatilizes.

[0060] As an embodiment, the step 2 includes: when the substrate 6 passes through the compacting device 3, controlling the compacting device 3 to flatten the substrate 6 coated with the slurry through a compacting roller and / or a compacting plate.

[0061] As an embodiment, the step 2 includes: when the substrate 6 passes through the interface treatment device 4, the interface treatment device 4 uses one or more methods of infrared heating, plasma treatment, and laser treatment to cure and level the surface of the coating 7.

[0062] As an implementation method, the thickness of the applied coating 7 is in the range of 40-100 μm. Therefore, the formed coating 7 is not prone to short circuit and has a small interface resistance.

[0063] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A roller coating device, comprising a silo (11) and a coating roller (12), wherein the silo (11) is used to contain slurry to be coated, the silo (11) is provided with a discharge port (111), the coating roller (12) is installed at the discharge port (111) and is rotatably connected to the silo (11), characterized in that: The coating roller (12) comprises a main body (122) and an abutment portion (121); the main body (122) is used for coating slurry on a substrate (6); the abutment portion (121) is telescopically mounted on the main body (122); when the coating roller (12) rotates, the abutment portion (121) contracts away from the material bin (11); when the coating roller (12) rotates to a preset number of turns, the abutment portion (121) extends out of the main body (122) and abuts against the material bin (11).

2. The roller coating device according to claim 1, characterized in that: Along the rotation direction (S) of the coating roller (12), the coating roller (12) abuts against the material bin (11) via the downstream side (1211) of the abutment portion (121).

3. The roller coating device according to claim 1, characterized in that: The number of the abutment portions (121) is two, and the two abutment portions (121) are arranged at two ends of the main body (122) along the axial direction (A) of the coating roller (12).

4. The roller coating device according to claim 1, characterized in that: Along the axial direction (A) of the coating roller (12), at least one end of the main body (122) is provided with a plurality of abutment portions (121), and the plurality of abutment portions (121) are arranged in an array along the circumferential direction (C) of the coating roller (12).

5. The roller coating device according to claim 4, characterized in that: The angle between two adjacent abutment portions (121) is θ, and the angle between two opposite sides of the silo (11) along the coating direction (X1) of the roller coating device (1) is δ, wherein δ=nθ, and n is a positive integer; when the coating roller (12) rotates to a preset number of turns, along the coating direction (X1) of the roller coating device (1), the two abutment portions (121) located on two opposite sides of the silo (11) both extend out of the main body (122) and abut against the silo (11).

6. The roller coating device according to claim 4, characterized in that: The number of the abutment portions (121) at one end of the main body portion (122) is d, wherein 2<d<16, and d is an integer.

7. The roller coating device according to claim 1, characterized in that: The preset number of revolutions of the coating roller (12) is a, and the actual number of revolutions of the coating roller (12) is b. When 0<ab<1, the abutment portion (121) corresponding to the preset number of revolutions extends out of the main body (122) to be abutted against the silo (11).

8. The roller coating device according to claim 7, characterized in that: Along the coating direction (X1) of the roller coating device (1), the central angle formed between the upstream side of the silo (11) and the lowest point of contact between the coating roller (12) and the substrate (6) is α, and the central angle formed between the upstream side of the silo (11) and the abutment portion (121) corresponding to the preset number of turns is β. When 0<ab<1 and β<α, the abutment portion (121) corresponding to the preset number of turns extends out of the main body (122).

9. The roller coating device according to any one of claims 1 to 8, characterized in that: Along the coating direction (X1) of the roller coating device (1), the material bin (11) comprises a first baffle (112) and a second baffle (113) which are arranged opposite to each other, and when the coating roller (12) rotates to a preset number of turns, the abutment portion (121) located at at least one end of the main body (122) abuts against the first baffle (112), or the two abutment portions (121) located at at least one end of the main body (122) abut against the first baffle (112) and the second baffle (113), respectively.

10. The roller coating device according to any one of claims 1 to 8, characterized in that: The main body (122) is provided with a card slot (1221), and the abutting portion (121) is a card plate, which is telescopically arranged in the card slot (1221).

11. The roller coating device according to any one of claims 1 to 8, characterized in that: The roller coating device (1) further comprises a switch, wherein the switch is arranged at the abutment point between the abutment portion (121) and the material bin (11).

12. The roller coating device according to claim 11, characterized in that: One end of the switch is embedded in the abutting portion (121) or the material bin (11) and is elastically connected to the abutting portion (121) or the material bin (11); the other end of the switch protrudes outside the abutting portion (121) or the material bin (11); when the abutting portion (121) abuts against the material bin (11), the switch is forced to retract and become flush with the surface of the abutting portion (121) or the material bin (11).

13. A battery manufacturing system, characterized in that: It comprises a roller coating device (1) as described in any one of claims 1 to 12.

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