WO2017107233A1

WO2017107233A1 - Film-coating apparatus

Info

Publication number: WO2017107233A1
Application number: PCT/CN2015/099534
Authority: WO
Inventors: 张祥领
Original assignee: 广东基泰智能设备有限公司
Priority date: 2015-12-25
Filing date: 2015-12-29
Publication date: 2017-06-29
Also published as: CN105633335B; CN105633335A

Abstract

Disclosed is a film-coating apparatus, comprising a rack. The rack is provided with a cam mechanism (4), and a fixed roll (31) and a pressure-applying roll (32) that are arranged mutually in parallel. The fixed roll (31) and the pressure-applying roll (32) are coated with traction films (23). A film material (24) on the traction films (23) is adhered to material (10) positioned between the fixed roll (31) and the pressure-applying roll (32) under the extrusion of the fixed roll (31) and the pressure-applying roll (32). The cam mechanism (4) comprises a cam shaft (42) and a connecting rod (43) of which one end is movably sheathed on the exterior of the cam shaft (42), and the other end of the connecting rod (43) is fixedly connected to the pressure-applying roll (32). The cam shaft (42) intermittently lifts the pressure-applying roll (32) through the connecting rod (43) when the cam shaft is rotating so as to enable the film material (24) to be adhered to the material (10) intermittently. The present film-coating apparatus adopts the manner that the pressure-applying roll (32) is lifted by the cam shaft (42) in an online rotating manner, so that the film material (24) is adhered to a battery pole piece intermittently; and a blank region (101) on the battery pole piece is prevented from being coated, so that the overlay precision of the pressure-applying film region and the coating region (100) is improved.

Description

Manual Title: Laminating device

Technical field

[0001] The present invention relates to the field of a laminating machine, and more particularly to a laminating apparatus.

Background technique

[0002] In the battery production process, the lithium-receiving process of the lithium-ion battery pole piece is the key technology to improve the capacity of the lithium-ion battery. The key to the lithium-replenishing process is the pressing and laminating, and the laminating process is to press the lithium A process in which a film is laminated on a pole piece of a lithium ion battery. Since the coating area of the battery pole piece is segmentally coated, there is a copper film leaving area in the middle interval, and the coating area is to be pressed by the film during the film coating process, and the copper film blank area is prohibited from applying pressure. The overlapping position of the pressure-coated film area and the coating area requires high precision, generally in the range of -2 mm to 2 mm, which is very high in process control for an on-line docking of a line speed of 50 m/min or more.

technical problem

The technical problem to be solved by the present invention is to provide a film laminating device in view of the above-mentioned drawbacks in the prior art.

Problem solution

Technical solution

[0004] The technical solution adopted by the present invention to solve the technical problem thereof is:

[0005] A film laminating apparatus is provided, comprising a frame, wherein the frame is provided with a cam mechanism and a fixing roller and a pressing roller disposed in parallel with each other, and the fixing roller and the pressing roller are coated with a traction Membrane, the film material on the traction film is adhered to the material between the fixed roller and the pressing roller under the pressing of the fixing roller and the pressing roller; the cam mechanism comprises a cam shaft and one end of a connecting rod disposed outside the cam shaft, wherein the other end of the connecting rod is fixedly connected with the pressing roller, and the cam shaft is intermittently rotated through the connecting rod The pressure application roller is lifted to cause the film material to adhere intermittently to the material.

[0006] In the film laminating apparatus of the present invention, a fine adjustment gap mechanism is disposed between the fixed roller and the pressing roller, and the fine adjustment gap mechanism includes a fourth motor, a slider assembly, an upper oblique block, and Lower oblique block a block is fixedly connected to the pressing roller, the lower inclined block is fixedly connected to the fixing roller, one end of the slider assembly is drivingly connected to the fourth motor, and the other end of the slider assembly is slidable Connected between the upper oblique block and the lower oblique block, the slider assembly moves the upper oblique block or the lower oblique block up and down during sliding.

[0007] In the film laminating device of the present invention, the slider assembly includes a screw rod and a slider, and the slider is slidably coupled between the upper oblique block and the lower oblique block. The fourth motor drives the screw to rotate, and the screw moves to move the slider in the axial direction of the screw.

[0008] In the film coating device of the present invention, the material has a plurality of coating zones, and a blanking zone is disposed between two adjacent coating zones, and the film material is adhered to the On the coating area.

[0009] In the film laminating apparatus of the present invention, the frame is provided with a color mark sensor, and the color mark sensor is located on a side of the material to which the film material is not adhered, the color mark A sensor is used to sense the starting and ending points of the coating zone to obtain the turns required for the coating zone to the coating point between the fixed roller and the pressing roller.

[0010] In the film laminating apparatus of the present invention, both ends of the fixing roller are respectively provided with fixed roller bearing seats, and both ends of the pressing roller are respectively provided with a pressing roller bearing seat, and the pressing is performed A pressure applying mechanism is provided on the roller bearing housing.

[0011] In the film laminating apparatus according to the present invention, the pressure applying mechanism includes a cylinder and a pressure sensor, and the pressure sensor is fixed to the pressure roller bearing housing, and is located at the cylinder and the pressure Between the roller bearing blocks, the pressure sensor senses that the actual applied pressure of the cylinder acting on the pressure roller bearing seat is greater than or less than a preset value, and the cylinder is controlled to change the output pressure.

[0012] In the film laminating apparatus according to the present invention, a film unwinding mechanism and a film take-up mechanism are respectively connected to both ends of the traction film.

[0013] In the film laminating apparatus of the present invention, the film material is located on a side of the traction film facing the material.

Advantageous effects of the invention

Beneficial effect

[0014] In summary, a film laminating device embodying the present invention has the following beneficial effects: First, the present application adopts a method in which a cam shaft is linearly lifted, and the pressing roller is lifted to make the film material intermittently adhered to On the pole piece of the battery, the blank area on the battery pole piece is prevented from being pressed by the film, and the area of the pressure coating film and the coating area are improved. Overlap precision. Secondly, the present application utilizes a pressure sensor to sense the magnitude of the applied pressure, and adjusts the pressure of the pressurized cylinder to achieve precise pressure application to the pressure roller. Third, the fine adjustment gap mechanism is used to adjust the working gap between the fixed roller and the pressure roller, so that the working gap is suitable for battery pole pieces of different materials and performances, and the product qualification rate is improved. Fourth, the coloring sensor is fixed at a certain distance from the filming point of the battery pole piece, and the filming precision of the film material in the coating area can be precisely controlled.

Brief description of the drawing

DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of a film laminating device according to an embodiment of the present invention;

2 is a schematic structural view of a roller mechanism and a cam mechanism of the film coating device shown in FIG. 1;

3 is a schematic structural view of a material of the film coating device shown in FIG. 1;

4 is a schematic structural view showing a cam shaft of the film coating device shown in FIG. 1 connected to a connecting rod;

5 is a schematic structural view of a fine adjustment gap mechanism of the film coating device shown in FIG. 1;

6 is a schematic structural view of a roller mechanism of the film coating device shown in FIG. 1.

Embodiments of the invention

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] As shown in FIG. 1 , a preferred embodiment of the present invention provides a film laminating device including a frame (not labeled), and a material conveying mechanism 1 and a film conveying mechanism 2 are disposed on the frame. The roller mechanism 3, the cam mechanism 4, the fine adjustment gap mechanism 5, the color scale sensor 6, and the pressing mechanism 7. The roller mechanism 3 includes a fixed roller 31 and a pressing roller 32 which are disposed in parallel with each other. As shown in FIG. 6, the material conveying mechanism 1 feeds the material 10 between the pressing roller 32 and the fixing roller 31, and the film feeding mechanism The traction film 23 to which the film material 24 is attached is coated on the fixing roller 31 and the pressing roller 32, and the film material 24 is adhered to the material 10 under the pressing of the fixing roller 31 and the pressing roller 32. As shown in FIG. 2, the cam mechanism 4 includes a cam shaft 42 and a link 43 that is movable at one end and sleeved outside the cam shaft 42. The other end of the link 43 is fixedly connected to the pressing roller 32, and the cam shaft 42 is rotated. The pressing roller 32 is intermittently lifted by the link 43 to intermittently adhere the film 24 on the traction film 24 to the material 10. [0024] The material 10 of the embodiment is a battery pole piece, and the film material 24 is a lithium film, but the specific material of the material 10 and the film material 24 is not limited in this embodiment. As shown in FIG. 3, the coating area 100 of the battery pole piece is segment coated, and the blank area 101 is spaced between the adjacent two coating areas 100, and the coating area 100 needs a pressure coating during the coating process. However, the blanking zone 101 is prohibited from applying pressure. The present application adopts a method in which the camshaft is rotated online to prevent the blanking zone 101 from being pressed.

As shown in FIG. 2, the roller mechanism 3 includes a fixed roller 31, a pressing roller 32, a first motor 33, a second motor 34, a fixed roller bearing housing 35, and a pressure roller bearing housing 36. The first motor 33 is drivingly connected to the fixed roller 31 and drives the fixed roller 31 to rotate. The two ends of the fixed roller 31 are respectively connected with the fixed roller bearing seat 35. The second motor 34 is driven and connected with the pressing roller 32. The pressing roller 32 is rotated, and the pressure roller bearing holder 36 is connected to both ends of the pressing roller 32, respectively. A working gap (not numbered) is formed between the fixed roller 31 and the pressing roller 32. Before the coating operation is started, the material conveying mechanism 1 feeds the battery pole piece into the working gap, and applies pressure through the pressing mechanism 7. The roller 32 presses the battery pole piece, and the direction indicated by the arrow in Fig. 1 is the tape running direction of the battery pole piece.

As shown in FIG. 2, the cam mechanism 4 includes a third motor 41, a cam shaft 42, and a link 43. The third motor 41 is drivingly connected to the cam shaft 42 and drives the cam shaft 42 to rotate. One end of the connecting rod 43 is movably sleeved outside the cam shaft 42 and the other end is fixed on the pressure roller bearing seat 36. In this embodiment, the cam shaft 42 is disposed in parallel with the pressing roller 32 and the fixed roller 31. One end of the connecting rod 43 has an annular shape, and the upper portion of the connecting rod 43 is provided with a connecting hole (not labeled) which is in clearance with the cam shaft 42. The shaft 42 is rotatably passed through the connecting hole, and the other end of the link 43 is fixed to the pressure roller bearing housing 36 by a fastener such as a bolt. The cam shaft 42 includes a rotating shaft 420 and a cam convex portion 421. The cam convex portion 421 pushes up the inner ring of the inner liner bearing on the connecting rod 43, and drives the connecting rod 43 to rise, lifting the pressing roller bearing seat 36, thereby lifting the entire pressing roller. 32. As shown in Fig. 4, when the cam convex portion 421 is at the position A, the pressing roller 32 is normally covered; when the cam convex portion 421 is rotated to between the point B and the point C, the pressing roller 32 is in the lifted state. Preferably, the circumferential angle corresponding to the BC arc is 50° to 80°, and the circumferential angle corresponding to the B C arc in the embodiment is 60°.

[0027] As shown in FIG. 1, the pressing mechanism 7 includes a cylinder 71 and a pressure sensor 72. The cylinder 71 is fixed to the frame, and applies pressure to the pressing roller 32 to press the pressing roller 32 against the battery pole piece, the pressure sensor. 72 is fixed to the pressure roller bearing housing 36 and is located between the cylinder 71 and the pressure roller 32. The pressure sensor 72 is used to sense the actual pressure applied by the cylinder 71 to the pressure roller 32. Since the magnitude of the applied pressure is also an element determining the quality of the film, the present application adopts a closed-loop control of the amount of applied pressure, so that the applied pressure operates smoothly in a small range. Specifically, the first controller (not shown) sets a preset value for the applied pressure, and the pressure sensor 72 senses the actual applied pressure. If the actual applied pressure is greater than or less than the preset value, the controller issues an instruction to adjust the oil cylinder 71 for oil supply. The pressure is such that the relative pressure of the pressure is achieved by changing the output pressure of the cylinder 71 to achieve precise pressure application to the pressure roller 32. In the present embodiment, the oil cylinder 71 and the pressure sensor 72 respectively include two, but the embodiment does not limit the specific number of the oil cylinder 71 and the pressure sensor 72.

[0028] As shown in FIG. 1, a fine adjustment gap mechanism 5 for adjusting the working gap between the fixed roller 31 and the pressing roller 32 is further disposed between the fixed roller 31 and the pressing roller 32. . Since the film coating process is an embedded process, the film material 24 is embedded into the coating zone 100 of the battery pole piece with a certain pressure, and the battery pole piece after the filming is changed compared with the battery pole piece before the film coating. Thinner. There is a certain proportion of the battery pole piece thinning, too much structure of the coating zone 100 which will damage the battery pole piece, too little film material 24 can not be fully embedded into the coating zone 100, so the filming force is not The size of the working gap is particularly important in the case of a change. In addition, the thickness of the battery pole pieces of different materials and properties is inconsistent, and the required working gap is also different, such as the thickness of the graphite coating layer is about 0. lmm~0.2mm, the thickness of the lithium cobalt oxide coating layer is about The thickness of the lithium iron phosphate coating layer is about 0.18 mm to 0.3 mm from 0.05 mm to 0.15 mm. If the working gap is not adjusted, a qualified product cannot be produced. The fine adjustment gap mechanism 5 of the embodiment adopts online adjustment, that is, after changing a battery pole piece, the working gap is adjusted while performing the laminating process during the debugging process, and the battery pole piece of the same specification does not need to be adjusted after the qualification is confirmed. .

[0029] As shown in FIGS. 1 and 5, the fine adjustment gap mechanism 5 mainly includes a fourth motor 51, a slider assembly 52, an upper oblique block 523, and a lower oblique block 54. Wherein, the upper oblique block 53 is fixed on the pressure roller bearing seat 36, the lower inclined block 54 is fixed on the fixed roller bearing seat 35, the slider assembly 52 is composed of the screw rod 521 and the slider 522, and the slider 522 is slidably connected Between the upper inclined block ₅₃ and the lower inclined block 54, one end of the lead screw 521 is connected to the slider 522 through a screw connection structure, and the other end of the lead screw 521 is drivingly connected to the fourth motor 51. In this embodiment, the connecting surface of the upper oblique block 53 and the slider 522 is a corresponding inclined surface, and the fourth motor 51 drives the screw rod 521 to rotate, and the screw rod 521 rotates to make the slider 522 along the screw rod 521. The axis direction moves, the slider 522 changes the relative position of the upper oblique block 53 during the movement, thereby changing the relative position of the pressure roller bearing seat 36, and finally realizing the fine adjustment action, such as the fourth motor 51 rotating one turn, the working gap Change 0.005mm. It can be understood that in other embodiments, an inclined surface may be provided at the joint surface of the slider 522 and the lower oblique block 54.

[0030] As shown in FIG. 1, the film conveying mechanism 2 includes a film unwinding mechanism, a film winding mechanism, and a traction film 23. Its The film unwinding mechanism and the film winding mechanism comprise two, respectively, a first film unwinding mechanism 21a, a first film unwinding mechanism 21b, a second film winding mechanism 22a and a second film. The material winding mechanism 22b, the first film unwinding mechanism 21a and the first film winding mechanism 22a correspond to the fixed roller 31, and the second film unwinding mechanism 21b and the second film winding mechanism 22b correspond to the pressing Roller 32. The first film unwinding mechanism 21a and the traction film 23 on the first film winding mechanism 22a are coated on the fixed roller 31, and the second film unwinding mechanism 21b and the second film winding mechanism 22b are pulled. The film 23 is coated on the pressing roller 32.

[0031] As shown in FIG. 6, before the traction film 23 enters the working gap, the film 23 is attached to the end surface of the traction film 23 toward the battery pole piece. After the traction film 23 enters the working gap, the film material 24 is on the fixed roller 31. The pressing rolls 32 are respectively adhered to both end faces of the battery pole piece under the pressing, and are peeled off from the pulling film 23. The point H in Fig. 6 is the coating point, and the film is formed after the battery pole piece reaches the coating point. The material conveying mechanism 1 is used for feeding the material 10 (ie, the battery pole piece) into the working gap between the fixed roller 31 and the pressing roller 32. Since the conveying mechanism of the material conveying mechanism 1 is a conventional technical means in the prior art, The specific structure will not be described here.

As shown in FIG. 1, the color sensor 6 is fixed to the chassis and electrically connected to a second controller (not shown), and the color sensor 6 is located on one side of the feeding direction of the battery pole piece. The laser beam of the color-coded sensor 6 is perpendicular to the battery pole piece. Since the tape speed of the battery pole piece and the distance from the color-coded sensor 6 to the coating point are both fixed, the color-code sensor 6 senses the start and end of the coating zone 100. The point 吋 will send a signal, and the second controller can accurately calculate the time required for the coating area 100 to the coating point according to the tape line speed of the battery pole piece and the distance of the color code sensor 6 to the coating point. Can be accurate to milliseconds.

[0033] Preferably, as shown in FIG. 4, the cam convex portion 421 is first rotated to the position of the D point, and then the starting point of the white space 101 is reached to the coating point, and the system controls the cam convex portion according to the length of the blanking portion 101. The 421 is moved from the position B to the position at the point C, and finally the filming accuracy of the film 24 in the coating zone 100 is precisely controlled. Specifically, the second controller calculates the time required for the starting point of the coating zone 100 to the coating point based on the signal from the color-coded sensor 6, and then calculates the cam convex portion 421 from the length of the blanking area 101 from the B. The time s and the rotational speed n required for the point position to move to the position C are calculated, and the inter-turn sl required for the cam convex portion 421 from the point D to the point B at the n-speed is calculated. Then, the cam convex portion 421 is first rotated to the position of the D point. When the starting point of the blanking portion 101 of the battery pole piece reaches the traveling distance from the coating point, the si吋 is required, and the cam shaft 42 is rotated at the rotation speed n. When the starting point of the white area 101 reaches the film point, the cam convex portion 421 is rotated to the position B, thereby precisely coating the coating area 100. [0034] In summary, a film laminating device embodying the present invention has the following beneficial effects: First, the present application adopts a method in which a cam shaft is linearly lifted, and the pressing roller is lifted to intermittently adhere the film material. On the battery pole piece, the blank area on the battery pole piece is prevented from being pressed by the film, and the overlapping precision of the area of the pressure-coated film and the coating area is improved. Secondly, the present application utilizes a pressure sensor to sense the magnitude of the applied pressure, and adjusts the pressure of the pressurized cylinder to achieve precise pressure application to the pressure roller. Third, the fine adjustment gap mechanism is used to adjust the working gap between the fixed roller and the pressure roller, so that the working gap is suitable for battery pole pieces of different materials and performances, and the product qualification rate is improved. Fourth, the coloring sensor is fixed at a certain distance from the filming point of the battery pole piece, and the filming precision of the film material in the coating area can be precisely controlled.

[0035] While the invention has been described by the embodiments of the invention, it will be understood that In addition, various modifications may be made to the invention without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments disclosed, but all embodiments that fall within the scope of the appended claims.

Claims

Claim

[Claim 1] A film laminating apparatus comprising a frame, wherein the frame is provided with a cam mechanism

(4) and a fixed roller (31) and a pressing roller (32) disposed in parallel with each other, the fixed roller (31) and the pressing roller (32) being coated with a traction film (23), the traction A film material (24) on the film (23) is adhered to the fixing roller (31) and the pressure applying roller under the pressing of the fixing roller (31) and the pressing roller (32) ( 32) between the material (10); the cam mechanism (4) includes a cam shaft (42) and a connecting rod (43) that is movable at one end and sleeved outside the cam shaft (42), the connection The other end of the rod (43) is fixedly connected to the pressing roller (32), and the cam shaft (42) intermittently lifts the pressing roller (32) through the connecting rod (43) So that the film (24) is intermittently adhered to the material (10).

[Claim 2] The film laminating apparatus according to claim 1, wherein a fine adjustment gap mechanism (5) is disposed between the fixed roller (31) and the pressing roller (32), and the fine adjustment is performed. the gap means (5) comprises a fourth motor (51), the slide assembly (52), a block (53) and a lower ramp ₍₅₄₎ on the ramp, the ramp of the block (53) and the pressing roller ( 32) a fixed connection, the lower oblique block ( ₅ 4) is fixedly connected to the fixed roller (31), and one end of the slider assembly (52) is drivingly connected to the fourth motor (51), the sliding The other end of the block assembly (52) is slidably coupled between the upper oblique block (53) and the lower oblique block (54), and the slider assembly (52) causes the upward tilt during sliding The block (53) or the lower ramp (54) moves up and down.

[Claim 3] The film laminating device according to claim 2, wherein the slider assembly (52) includes a screw (521) and a slider (522), and the slider (522) is slidable Between the upper slanting block (53) and the lower slanting block (54), the fourth motor (51) drives the screw (521) to rotate, and the screw (521) is rotating The slider (52 2) is moved in the axial direction of the screw (521).

[Claim 4] The film laminating device according to claim 1, wherein the material (10) has a plurality of coating zones (100) between two adjacent coating zones (100) A blanking area (101) is provided, and the film (24) is adhered to the coating zone (100).

[Claim 5] The film laminating device according to claim 4, wherein the frame is provided with a color code sensor (6), and the color code sensor (6) is located at the material (10) Adhering to a side of the film material (24), the color code sensor (6) is used to sense a start and end point of the coating zone (100) to obtain the coating zone (100) to the The intertwining required for the coating point between the fixed roller (31) and the pressing roller (32).

[Claim 6] The film laminating device according to claim 1, wherein both ends of the fixing roller (31) are respectively provided with a fixed roller bearing housing (35), and the pressing roller (32) A pressure roller bearing housing (36) is disposed at each end, and a pressure applying mechanism (7) is disposed on the pressure roller bearing housing (36).

[Claim 7] The film laminating device according to claim 6, wherein the pressure applying mechanism (7) includes a cylinder (71) and a pressure sensor (72), and the pressure sensor (72) is fixed at the The pressure roller bearing housing (36) is located between the cylinder (71) and the pressure roller bearing housing (36), and the pressure sensor (72) senses the cylinder (71) The actual applied pressure on the pressure roller bearing housing (36) is greater than or less than a preset value 吋, and the cylinder (71) is controlled to change the output pressure.

The film laminating apparatus according to claim 1, wherein a film unwinding mechanism and a film take-up mechanism are respectively connected to both ends of the traction film (23).

[Claim 9] The film laminating device according to claim 1, wherein the film material (24) is located on a side of the traction film (23) facing the material (10).