A lithium battery separator edge material collection winding mechanism

Abstract

The utility model relates to the technical field of winding core body, disclose a kind of lithium battery diaphragm edge material collection winding core mechanism, including winding core assembly, the winding core assembly includes the inner winding body and outer winding body that are coaxially fixedly connected and are wound into hollow cylinder, the first end of the inner winding body and the second end of the outer winding body form overlapping coverage area, and the first end of the inner winding body is fixedly connected with the second end of the outer winding body by connecting component.The winding core assembly of the utility model fixes the inner winding body and outer winding body as closed hollow cylinder by connecting component, is convenient to disassemble, can satisfy the recycling demand, and save cost.

Description

Technical Field

[0001] This utility model relates to the field of winding core technology, specifically a mechanism for collecting edge material of lithium battery separators. Background Technology

[0002] In the structure of lithium batteries, the lithium battery separator is one of the key core components, and its performance directly affects the battery's capacity, cycle life, and safety performance. The production process of lithium battery separators requires customized separator dimensions; therefore, wide-width raw films need to be slit, and the waste edges generated during slitting also need to be simultaneously wound up and recycled.

[0003] In existing technologies, the edge material generated after the lithium battery separator is slit is mostly rolled up with paper cores. After the paper core has finished rolling up the edge material of the separator, it is necessary to use a blade to cut the paper core before unwinding. This makes the paper core unusable, resulting in high costs. Moreover, the cutting process of the paper core is not only time-consuming and labor-intensive, but also poses a risk of damaging the separator and affecting safety.

[0004] Therefore, there is an urgent need for a recyclable and easily disassembled lithium battery separator edge material collection mechanism. Utility Model Content

[0005] The purpose of this utility model is to provide a lithium battery separator edge material collection and winding mechanism to solve the problems mentioned in the background art, so as to achieve the purpose of recycling and easy disassembly.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lithium battery separator edge material collection core mechanism includes a core assembly. The core assembly includes an inner core and an outer core wound into a hollow cylinder and coaxially fixedly connected. The first end of the inner core and the second end of the outer core form an overlapping coverage area. The first end of the inner core is fixedly connected to the second end of the outer core through a connecting assembly.

[0008] As a further embodiment of this utility model: in order to fix the inner and outer rolled bodies after they are wound into a hollow cylinder, the connecting assembly includes a connecting block. The connecting block is disposed on the top of the inner rolled body near its first end, and the outer rolled body has a groove for embedding the connecting block at its bottom near its second end.

[0009] As a further embodiment of this utility model: in order to fix the connecting block on the inner roll body, a limiting block is fixedly connected to the bottom of the connecting block, a through groove for embedding the limiting block is provided on the inner roll body, positioning holes are provided on the side walls at both ends of the through groove, and the connecting block is fixed on the inner roll body by a connecting shaft passing through the positioning hole and the limiting block.

[0010] As a further embodiment of this utility model: in order to facilitate applying pressure to the inner roll body to disassemble the core assembly, both ends of the connecting shaft extend out of the inner roll body and form operating ends.

[0011] As a further solution of this utility model: in order to prevent the connection between the inner roll body and the outer roll body from being unstable, the inner roll body and the outer roll body are fixedly connected by adhesive tape.

[0012] As a further embodiment of this utility model: in order to facilitate the removal of the connecting block from the groove, the first ends of both the inner and outer rolled bodies are arc-shaped ends, and the second ends of both the inner and outer rolled bodies are flat ends.

[0013] As a further embodiment of this utility model: in order to enable the core assembly to have a certain deformation capability and facilitate disassembly and installation, the inner and outer roll bodies are made of elastic PP material.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model features a novel structure. Because the inner and outer rolls are made of elastic PP material, the core assembly can deform under force, allowing it to be wound into a hollow cylinder. This also facilitates quick and easy disassembly of the core assembly and subsequent removal of the diaphragm roll, enabling the inner and outer rolls to be reused. The nested fit between the limiting block of the connecting component and the groove on the outer roll facilitates the fixed connection or separation of the first end of the inner roll and the second end of the outer roll, making disassembly and installation convenient. Furthermore, no additional adhesive or other treatment is required at either end; the core assembly can be easily fitted onto the air-expansion shaft for winding. When separation is needed, the core assembly can be quickly detached from the diaphragm roll by pressing the connecting shaft and applying force to the inner roll. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a front view of the present invention;

[0018] Figure 3 This is a partial schematic diagram of the present invention;

[0019] Figure 4 This is an exploded view of the connection between the inner and outer roll bodies of this utility model.

[0020] In the diagram: 1-core assembly, 11-inner roll body, 111-through groove, 112-positioning hole, 12-outer roll body, 121-groove, 13-adhesive tape, 14-connecting assembly, 141-connecting block, 142-limiting block, 143-connecting shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations.

[0023] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] Please see Figure 1-4 In this embodiment of the present invention, a lithium battery separator edge material collection winding mechanism includes a winding assembly 1, which includes an inner winding body 11 and an outer winding body 12. The inner winding body 11 and the outer winding body 12 are glued and fixed by an adhesive tape 13, providing basic stability for the winding assembly 1. When unfolded, the inner winding body 11 and the outer winding body 12 are both flat plates. The inner winding body 11 and the outer winding body 12 are made of elastic PP material, which facilitates bending and winding operations of the inner winding body 11 and the outer winding body 12.

[0025] Please refer to Figure 1The inner rolled body 11 and the outer rolled body 12 are wound to form a hollow cylinder, and the outer rolled body 12 is fitted on the outer periphery of the inner rolled body 11. The first edge of the inner rolled body 11 and the outer rolled body 12 are both convex arc surfaces, i.e. arc end, and the second edge of the inner rolled body 11 and the outer rolled body 12 are both flat surfaces, i.e. flat end. The first ends of the inner rolled body 11 and the outer rolled body 12 are on the same side. A first opening is formed between the two ends of the inner rolled body 11 and a second opening is formed between the two ends of the outer rolled body 12. The first opening and the second opening are staggered along the circumference of the core assembly 1 to enhance the stability and sealing of the core assembly 1.

[0026] Please refer to Figure 3 The second end of the outer roll 12 overlaps with the first end of the inner roll 11, forming an overlapping area. The first end of the inner roll 11 is fixedly connected to the second end of the outer roll 12 via a connecting assembly 14. The connecting assembly 14 includes a connecting block 141, and a limiting block 142 is welded to the bottom of the connecting block 141. The axial directions of the limiting block 142 and the connecting block 141 are both consistent with the axial direction of the inner roll 11. The outer roll 12 has a groove 121 for embedding the connecting block 141 at its bottom near its second end. The inner roll 11 has a through groove 111 for embedding the limiting block 142 at its position near its first end and corresponding to the groove 121, so that the limiting block 142 and the connecting block 141 can be respectively embedded into the through groove 111 and the groove 121, thereby securing the inner roll 12. The first end of the inner roll 11 is fixedly connected to the second end of the outer roll 12, so that the inner roll 11 and the outer roll 12 form a closed hollow cylinder. The side walls at both ends of the through groove 111 are provided with positioning holes 112, and the limiting block 142 is provided with through holes along its axial direction. The connecting shaft 143 passes through the positioning holes 112 and the through holes on the limiting block 142 in sequence, so that the connecting assembly 14 can be fixed on the inner roll 11. The length of the connecting shaft 143 is greater than the axial length of the inner roll 11, so that the two ends of the connecting shaft 143 can extend out of the inner roll 11 and form operating ends, so that when disassembling the core assembly 1, the two ends of the connecting shaft 143 can be pressed, so that the connecting block 141 can be disengaged from the groove 121, thereby separating the first end of the inner roll 11 from the second end of the outer roll 12.

[0027] This utility model has a novel structure and stable operation. In use, the inner roll body 11 and outer roll body 12 are first bonded and fixed in a staggered manner along their length using adhesive tape 13, so that the second end of the outer roll body 12 overlaps with the first end of the inner roll body 11. After the limiting block 142 is inserted into the through groove 111, the connecting shaft 143 is sequentially passed through the positioning hole 112 and the through hole of the limiting block 142, thus fixing the connecting assembly 14 onto the inner roll body 11. Then, the connecting... The inner roll body 11 and the outer roll body 12 are bent into hollow cylinders until the connecting block 141 on the inner roll body 11 is nested into the groove 121 on the outer roll body 12, thus completing the fixed connection between the first end of the inner roll body 11 and the second end of the outer roll body 12, so that the inner roll body 11 and the outer roll body 12 form a closed hollow cylinder; then the core assembly 1 is sleeved on the outer periphery of the air expansion shaft, and the air expansion shaft fixes the core assembly 1 by air expansion and tightening, which facilitates the next step of winding the diaphragm edge material.

[0028] When the winding operation is completed and the diaphragm roll needs to be disassembled, first release the clamping force of the air-expansion shaft, and then press the two ends of the connecting shaft 143 inward along the axial direction of the core assembly 1 until the connecting block 141 disengages from the groove 121, so that the first end of the inner roll 11 and the second end of the outer roll 12 are separated, thereby disassembling the core assembly 1 and completing the disassembly of the diaphragm roll.

[0029] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0030] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A lithium battery separator edge material collection winding mechanism, comprising a winding assembly (1), characterized in that: The core assembly (1) includes an inner core (11) and an outer core (12) wound into a hollow cylinder and fixedly connected coaxially; the first end of the inner core (11) and the second end of the outer core (12) form an overlapping coverage area, and the first end of the inner core (11) is fixedly connected to the second end of the outer core (12) through a connecting assembly (14).

2. The winding core mechanism according to claim 1, characterized in that: The connecting component (14) includes a connecting block (141) disposed on the top of the inner roll body (11) near its first end, and the outer roll body (12) has a groove (121) for fitting the connecting block (141) at its bottom near its second end.

3. The winding core mechanism according to claim 2, characterized in that: The bottom of the connecting block (141) is fixedly connected to a limiting block (142). The inner roll body (11) is provided with a through groove (111) for embedding the limiting block (142). Positioning holes (112) are provided on the side walls at both ends of the through groove (111). The connecting block (141) is fixed on the inner roll body (11) by a connecting shaft (143) that passes through the positioning hole (112) and the limiting block (142).

4. The winding core mechanism according to claim 3, characterized in that: Both ends of the connecting shaft (143) extend out of the inner roll body (11) and form operating ends.

5. The winding core mechanism according to claim 1, characterized in that: The inner roll (11) and the outer roll (12) are fixedly connected by adhesive tape (13).

6. The winding core mechanism according to claim 1, characterized in that: The first ends of both the inward-curling body (11) and the outward-curling body (12) are curved ends, and the second ends of both the inward-curling body (11) and the outward-curling body (12) are planar ends.

7. The winding core mechanism according to claim 1, characterized in that: The inner roll (11) and outer roll (12) are made of elastic PP material.

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