Lithium battery electrode plate laminating device

Abstract

The utility model discloses a lithium battery electrode plate laminating device, and particularly relates to the field of lithium battery production equipment, the lithium battery electrode plate laminating device comprises a glue removing mechanism, the glue removing mechanism comprises a frame, a conveying roller, a wind-up roller and a cleaning strip, the conveying roller and the wind-up roller are both rotatably connected to the frame, and the cleaning strip winds around the conveying roller in sequence and then is wound up by the wind-up roller; wherein the laminated diaphragm and pole piece laminated object sequentially passes through a plurality of conveying rollers and then is wound by a winding machine, the side edge of the diaphragm and pole piece laminated object is in differential fit with the cleaning strip, and the adhesive removing mechanism is arranged between the output end of the laminating mechanism and the winding machine, so that the cleaning strip in the adhesive removing mechanism is in differential fit with the diaphragm and pole piece laminated object; the laminating object and the cleaning strip move relatively on the premise of having the differential speed, so that the cleaning strip can erase glue liquid overflowing from the edge of the laminating object, normal winding of the laminating object is still reasonably guaranteed in the whole process, and the purposes of efficient winding and glue removing are achieved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production equipment, and more specifically, to a lithium battery electrode sheet bonding device. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and a non-aqueous electrolyte solution.

[0003] Common lithium battery shapes include cylindrical lithium batteries, square lithium batteries, and pouch lithium batteries. Regardless of the shape, lithium batteries are mostly manufactured by rolling up a separator and positive and negative electrode sheets in a spaced manner to form the core of the lithium battery.

[0004] When bonding the diaphragm and positive and negative electrode sheets, there are two types of bonding: adhesive bonding and non-adhesive bonding. In the adhesive bonding process, the adhesive is squeezed by the rollers during the winding process and overflows onto the sides of the positive and negative electrode sheets and the diaphragm. Failure to clean this will affect subsequent production and use. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a lithium battery electrode sheet bonding device. The technical problem to be solved by the present invention is: how to efficiently remove the adhesive that overflows between the separator and the positive and negative electrode sheets during the winding process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lithium battery electrode sheet bonding device, including a de-adhesive mechanism, comprising a frame, a conveying roller, a winding roller, and a cleaning strip. The conveying roller and the winding roller are rotatably connected to the frame. The cleaning strip passes around the conveying roller in sequence and is then wound up by the winding roller. The diaphragm electrode sheet bonding material, after being pressed, passes through several conveying rollers in sequence and is then wound up by the winding machine. The side of the diaphragm electrode sheet bonding material and the cleaning strip are bonded at a differential speed.

[0007] In a preferred embodiment, a motor is mounted outside the frame, and the output shaft of the motor and the take-up roller are driven by a transmission gear meshing. The motor and an external controller are electrically connected.

[0008] In a preferred embodiment, a release roller is rotatably connected to the frame, and the release roller and the take-up roller are symmetrically arranged, with the cleaning strip being released by the release roller.

[0009] In a preferred embodiment, the frame includes uprights and connecting rods. The two uprights are placed vertically and are fixed to the housing of the winding machine by the winding rollers on the corresponding sides. The conveying roller, winding roller, and release roller are all rotatably connected to the uprights.

[0010] In a preferred embodiment, the frame further includes a horizontal plate and slots. The horizontal plate is horizontally fixed between two vertical plates, and several conveying rollers are staggered on the upper and lower sides of the horizontal plate. The vertical plates are provided with slots for the cleaning strip and the diaphragm electrode assembly to pass through.

[0011] In a preferred embodiment, the adhesive removal mechanism is provided with a tensioning mechanism for adjusting the tension of the cleaning strip and the diaphragm electrode assembly, including an arched frame, a screw, and a throttle. The arched frame is slidably placed within the frame, and the arched frame is rotatably connected to the corresponding conveyor roller. The screw is threadedly connected to the arched frame and rotatably connected to the cross plate. The outer end of the screw is fixedly connected to the throttle.

[0012] In a preferred embodiment, the side wall of the upright plate is provided with a sliding groove, and the arched frame is slidably placed in the sliding groove.

[0013] In a preferred embodiment, a rotating rod adapted to the conveyor roller and the take-up roller is fixed on the frame, the conveyor roller and the take-up roller are sleeved on the rotating rod, and an anti-detachment knob is screwed onto the rotating rod.

[0014] In a preferred embodiment, the winding speed of the cleaning strip is greater than the winding speed of the diaphragm electrode.

[0015] In a preferred embodiment, the width of the cleaning strip is less than the length of the generatrix of the conveyor roller.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] By installing a glue removal mechanism between the output end of the pressing mechanism and the winding machine, the cleaning strip and the diaphragm electrode assembly in the glue removal mechanism are bonded at a differential speed. The assembly and the cleaning strip move relative to each other under the premise of differential speed, so that the cleaning strip can wipe away the glue overflowing from the edge of the assembly, and the normal winding of the assembly is still reasonably guaranteed throughout the process, so as to achieve the purpose of efficient winding and glue removal. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of this utility model. The embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a structural diagram of the lithium battery electrode sheet bonding device of this utility model.

[0020] Figure 2 This is a rear structural view of the frame in this utility model.

[0021] Figure 3 This is a front structural view of the frame in this utility model.

[0022] Figure 4 This is a side cross-sectional view of the frame in this utility model.

[0023] The attached figures are labeled as follows: 1. Degumming mechanism; 11. Frame; 111. Horizontal plate; 112. Vertical plate; 113. Connecting rod; 114. Groove; 12. Conveyor roller; 13. Rewinding roller; 14. Motor; 15. Release roller; 2. Tensioning mechanism; 21. Arch frame; 22. Screw; 23. Rotary handle; 3. Rewinder. Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0025] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0026] Example 1

[0027] like Figures 1-4 A lithium battery electrode bonding device includes an adhesive removal mechanism 1, a pressing mechanism, and a winding machine 3. The adhesive removal mechanism 1 is used to receive the separator electrode bonding material output from the pressing mechanism. The separator electrode bonding material passes through the adhesive removal mechanism 1 and is then finally wound up by the winding machine 3. When the bonding material enters the adhesive removal mechanism 1, the adhesive overflowing from both sides of the bonding material will be removed in the adhesive removal mechanism 1.

[0028] Specifically, in the lithium battery production process, firstly, positive and negative electrode sheets coated with active materials and porous separator materials are prepared. Then, pretreatment such as cleaning and drying is carried out to ensure the surface of the materials is clean. Next, according to the battery design, the positive electrode sheet, separator, and negative electrode sheet are arranged in sequence and tightly bonded using a winding or stacking method. The separator needs to be slightly wider to cover the edges and prevent short circuits. Afterward, the bonded assembly is output from the pressing mechanism and wound up by the winding machine 3.

[0029] The adhesive removal mechanism 1 includes a frame 11, a take-up roller 13, a motor 14, and a release roller 15. Several take-up rollers 13 are rotatably connected at different heights on the frame 11. There is one take-up roller 13 and one release roller 15. The cleaning strip pulled out from the release roller 15 passes through several conveyor rollers 12 arranged at different heights and is then wound up by the take-up roller 13. The motor 14 is installed on the frame 11. The output shaft of the motor 14 drives the take-up roller 13 to rotate through a transmission gear set. The motor 14 is used to drive the take-up roller 13 to rotate relative to the frame 11 so as to continuously wind up the cleaning strip wrapped on the take-up roller 13.

[0030] One gear is fixedly connected to the output shaft of the motor 14, and the other gear is fixedly connected to the end face of the take-up roller 13. The gears mesh and drive each other. The above-mentioned transmission gear set is a common drive design, so it will not be described in detail here.

[0031] After the above structure is arranged, the diaphragm electrode assembly is extracted from the output end of the pressing mechanism and then passed through the conveyor rollers 12 arranged at different heights. At this time, the cleaning strip is located between the conveyor rollers 12 and the assembly, so that the cleaning strip and the side edge of the assembly are in contact. One end of the assembly is wound up by the winding machine 3. The speed at which the winding machine 3 wound up the assembly is different from the speed at which the winding roller 13 wound up the cleaning strip. Therefore, when the assembly and the cleaning strip with different speeds move relative to each other, the adhesive on the side edge of the assembly will be wiped off by the cleaning strip. This achieves the purpose of efficient winding and adhesive removal by simultaneously winding up the assembly and removing the adhesive overflowing from the edge of the assembly.

[0032] Preferably, the cleaning strip is made of non-woven fabric, microfiber cloth or paper-based material.

[0033] Preferably, the frame 11 specifically includes a horizontal plate 111, an upright plate 112, a connecting rod 113, and slots 114. The horizontal plate 111 is placed horizontally, and upright plates 112 are connected to both sides of the horizontal plate 111. The outer side of the upright plate 112 is fixedly connected to the outer shell of the winding machine 3 through the connecting rod 113. Several slots 114 are provided on the horizontal plate 111. The slots 114 are located between two adjacent horizontally arranged conveyor rollers 12. Several conveyor rollers 12 arranged at different heights are located on both sides of the horizontal plate 111. The slots 114 are used to provide space for the bonding material and cleaning strip to pass through.

[0034] Preferably, the connecting rod 113 is L-shaped, which facilitates connection by fasteners or welding.

[0035] Preferably, the width of the cleaning strip can be selected according to the user's needs. Its width should not be too wide, and should be less than the width of the conveyor roller 12 and the take-up roller 13. In use, the narrow-edged cleaning strip only needs to clean the excess adhesive on the sides of the positive and negative electrode sheets. Reducing the width of the cleaning strip can effectively reduce material loss.

[0036] Preferably, a rotating rod adapted to the conveyor roller 12 and the take-up roller 13 is fixedly installed on the vertical plate 112. The conveyor roller 12 and the take-up roller 13 are sleeved on the rotating rod, and an anti-detachment knob is screwed onto the rotating rod. In use, the shaft holes on the conveyor roller 12 and the take-up roller 13 are aligned with the rotating rod and inserted. Then, the rotating rod is tightened by tightening the anti-detachment knob to prevent the sides of the conveyor roller 12 and the take-up roller 13 from detaching, which facilitates the replacement of the cleaning strips on the conveyor roller 12 and the take-up roller 13 when necessary.

[0037] Example 2

[0038] like Figure 4 Based on Example 1, a tensioning mechanism 2 is also provided to adjust the tension of the cleaning cloth and the bonding material between several conveying rollers 12.

[0039] Specifically, the tensioning mechanism 2 includes an arched frame 21, a screw 22, and a handle 23. A groove is provided on the side wall of the upright plate 112, and the arched frame 21 is slidably placed in the groove. The end of the arched frame 21 is rotatably connected to the corresponding conveyor roller 12. A gap is provided between the conveyor roller 12 and the upright plate 112. The screw 22 passes through the arched frame 21 and the horizontal plate 111. The screw 22 is rotatably connected to the horizontal plate 111 and also threadedly connected to the arched frame 21. The top of the screw 22 is fixedly connected to the handle 23. By rotating the handle 23, the user drives the screw 22 to rotate, thereby adjusting the arched frame 21 to rise or fall relative to the upright plate 112. This causes the conveyor roller 12 connected to the arched frame 21 to squeeze or loosen the cleaning strip and adhesive in contact with it, thereby achieving the purpose of flexibly adjusting the tension.

[0040] For example, in actual production, as the amount of cleaning strips wound by the take-up roller 13 increases, the overall volume of the take-up roller 13 will increase. At this time, the laminated material passing over the surface of the take-up roller 13 will be under pressure. At this time, the surface tension of the cleaning strip and the laminated material can be reduced by adjusting the screw 22 in time to ensure the flatness of the laminated material during the winding process.

[0041] In this embodiment, a telescopic cylinder can also be designed. The cylinder body and the upright plate 112 are fixed. A telescopic rod is slidably connected inside the cylinder. The telescopic rod is rotatably connected to the corresponding conveyor roller 12. A control component for controlling the movement of the telescopic rod is provided inside the cylinder. The control component is electrically connected to an external controller. The external controller has built-in running code. By reasonably controlling the moving speed of the telescopic rod, the flatness of the laminate during winding can be maintained.

[0042] Preferably, the telescopic cylinder can be an electric cylinder, a hydraulic cylinder, a pneumatic cylinder, etc. In this embodiment, an electric cylinder is preferred because the operation of an electric cylinder is more stable.

[0043] Working principle of this utility model:

[0044] By arranging a glue removal mechanism 1 between the output end of the pressing mechanism and the winding machine 3, a differential speed is created between the cleaning strip and the diaphragm electrode assembly within the glue removal mechanism 1. The assembly and the cleaning strip move relative to each other under the premise of differential speed, thereby allowing the cleaning strip to wipe away the glue overflowing from the edge of the assembly. Throughout the process, the normal winding process of the assembly is still reasonably guaranteed, achieving the purpose of efficient winding and glue removal.

[0045] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0046] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0047] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0048] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lithium battery electrode bonding device, characterized in that... include: The adhesive removal mechanism (1) includes a frame (11), a conveyor roller (12), a take-up roller (13) and a cleaning strip. The conveyor roller (12) and the take-up roller (13) are rotatably connected to the frame (11). The cleaning strip passes around the conveyor roller (12) in sequence and is then wound up by the take-up roller (13). The diaphragm electrode composite, after being pressed, passes through several conveyor rollers (12) and is then wound up by a winding machine (3). The sides of the diaphragm electrode composite are differentially bonded to the cleaning strip.

2. The lithium battery electrode sheet bonding device according to claim 1, characterized in that: A motor (14) is installed outside the frame (11). The output shaft of the motor (14) and the take-up roller (13) are driven by a transmission gear. The motor (14) is electrically connected to an external controller.

3. A lithium battery electrode sheet bonding device according to claim 1 or 2, characterized in that: A release roller (15) is rotatably connected to the frame (11). The release roller (15) and the take-up roller (13) are symmetrically arranged, and the cleaning strip is released from the release roller (15).

4. The lithium battery electrode sheet bonding device according to claim 3, characterized in that: The frame (11) includes upright plates (112) and connecting rods (113). The two upright plates (112) are placed vertically. The upright plates (112) are fixed to the outer shell of the winding machine (3) by the winding roller (13) on the corresponding side. The conveying roller (12), winding roller (13) and release roller (15) are all rotatably connected to the upright plates (112).

5. A lithium battery electrode sheet bonding device according to claim 4, characterized in that: The frame (11) also includes a horizontal plate (111) and a slot (114). The horizontal plate (111) is horizontally fixed between two vertical plates (112). Several conveying rollers (12) are arranged alternately on the upper and lower sides of the horizontal plate (111). The vertical plate (112) has a slot (114) for the cleaning strip and the diaphragm electrode assembly to pass through.

6. The lithium battery electrode sheet bonding device according to claim 5, characterized in that: The adhesive removal mechanism (1) is provided with a tensioning mechanism (2) for adjusting the tension of the cleaning strip and the diaphragm electrode assembly. The tensioning mechanism includes an arched frame (21), a screw (22), and a throttle (23). The arched frame (21) is slidably placed inside the frame (11). The arched frame (21) and the corresponding conveyor roller (12) are rotatably connected. The screw (22) is threadedly connected to the arched frame (21) and rotatably connected to the horizontal plate (111). The outer end of the screw (22) is fixedly connected to the throttle (23).

7. A lithium battery electrode sheet bonding device according to claim 6, characterized in that: The side wall of the upright plate (112) is provided with a sliding groove, and the arched frame (21) is slidably placed in the sliding groove.

8. The lithium battery electrode sheet bonding device according to claim 5, characterized in that: The frame (11) is fixed with a rotating rod that is compatible with the conveying roller (12) and the winding roller (13). The conveying roller (12) and the winding roller (13) are sleeved on the rotating rod, and an anti-detachment knob is screwed onto the rotating rod.

9. A lithium battery electrode sheet bonding device according to claim 1, characterized in that: The winding speed of the cleaning strip is greater than the winding speed of the diaphragm electrode.

10. A lithium battery electrode sheet bonding device according to claim 1, characterized in that: The width of the cleaning strip is less than the length of the generatrix of the conveyor roller (12).

Images