Battery separator sleeve structure

Abstract

The utility model belongs to the battery production technical field, concretely relates to a battery diaphragm sleeve structure, including motion adjusting part, support base body and at least one tension movable part, be equipped with at least one guide inclined plane on support base body, tension movable part swing joint is in guide inclined plane, motion adjusting part rotation setting is in support base body, and one end of motion adjusting part is driven to be connected with tension movable part, the utility model can realize the size of the outer ring of diaphragm winding drum structure is changed, further is favorable to realize the release diaphragm elastic stress under the cyclic motion effect of tension movable part when diaphragm unwinds, to avoid the appearance inner ring wrinkle of pole piece because of elastic stress retraction, so that the quality of the battery cell produced is improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing technology, and in particular relates to a battery separator sleeve structure. Background Technology

[0002] With the rapid development of science and technology, human demand for portable electronic devices is increasing, leading to increasingly stringent requirements for the batteries used in them. As the core function of electronic devices, batteries directly impact the user's experience. In today's era of pursuing large and thin electronic devices, the size specifications of lithium batteries are becoming increasingly demanding. When batteries are produced to be large and thin, they are prone to deformation, which will seriously affect the performance of lithium-ion batteries. The separators used in lithium-ion battery production are generally polyolefin separators, which have strong elasticity. After the separator is cut, if the winding tension is too high, the separator will be in a taut state. When rolled into a core, especially a large and thin core, the separator itself is prone to strong shrinkage.

[0003] However, in the battery production process, the existing separator roll is a fixed-size plastic structure. Before the cell is wound, the separator is cut and wound. The winding process will tighten the separator and cause elastic stress in the separator. During the production process, the elastic stress generated by the unwinding of the separator will cause wrinkles in the inner ring of the anode, thus affecting the quality of the cell. Utility Model Content

[0004] The purpose of this utility model is to provide a battery separator sleeve structure that addresses the shortcomings of existing technologies and solves the technical problem of inner ring wrinkles on the electrode sheets caused by elastic stress retraction during the unwinding process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A battery separator sleeve structure includes a motion adjustment component, a support base, and at least one tensioning movable component; the support base is provided with at least one guide slope; the tensioning movable component is movably connected to the guide slope; the motion adjustment component is rotatably disposed on the support base, and one end of the motion adjustment component is drivenly connected to the tensioning movable component.

[0007] Preferably, the support base is provided with a wedge; the guide slope and the support base are disposed opposite to each other on the two side surfaces of the wedge; and the tensioning movable member is provided with an assembly slope facing the bottom of the wedge; the assembly slope abuts against the guide slope; and the tensioning movable member abuts against the wedge.

[0008] Preferably, the wedge-shaped portion has a movable groove on its surface away from the support base; and the motion adjustment component includes an adjustment handle and an adjustment connecting rod; the adjustment connecting rod is disposed inside the movable groove; and one end of the adjustment connecting rod passes through the wedge-shaped portion and is movably connected to one end of the adjustment handle; the other end of the adjustment connecting rod is connected to the tensioning movable component.

[0009] Preferably, the motion adjustment component further includes a guide limiting rod and a compression elastic element; one end of the guide limiting rod passes through the adjustment connecting rod and is connected to the adjustment handle; the compression elastic element abuts against the guide limiting rod and the adjustment connecting rod.

[0010] Preferably, the outer surface of the tensioning movable member away from the support base is provided with an arc-shaped surface; the arc-shaped surfaces on different tensioning movable members are arranged sequentially around the outer surface of the support base in the circumferential direction to form an outer contour of cylinder.

[0011] Preferably, the tensioning movable member is further provided with a second limiting groove on the outer surface facing the support base; one end of the adjusting connecting rod is connected to the inner wall of the second limiting groove.

[0012] Preferably, the battery separator sleeve structure further includes a protective outer layer; the protective outer layer surrounds and is connected to the outer surface of all the tensioning moving parts away from the support substrate.

[0013] Preferably, a compression limiting member is provided between the protective outer layer and the tensioning movable member; each tensioning movable member has a first limiting groove on its outer surface away from the support base; the first limiting groove is disposed on the tensioning movable member; and the compression limiting member is sleeved on the inner wall of the first limiting groove.

[0014] Preferably, the battery separator sleeve structure further includes at least one spacer; the spacer is connected to the tensioning movable member; and the spacer abuts against the support base.

[0015] Preferably, the partition is provided with a mounting groove; a fastening screw is provided in the mounting groove; one end of the fastening screw is connected to the tensioning movable member;

[0016] Furthermore, the inner diameter of the mounting groove along its length is greater than the outer diameter of the fastening screw.

[0017] The beneficial effects of this utility model are that, by using the rotational drive of the motion adjustment component, the tensioning movable component is driven to move along the guide inclined surface, thereby changing the size of the outer ring of the diaphragm roll structure and achieving the characteristic of variable diameter; furthermore, it is beneficial to release the elastic stress of the diaphragm through the cyclical movement of the tensioning movable component during diaphragm unwinding, so as to avoid the inner ring wrinkles of the electrode sheet caused by elastic stress retraction; thus improving the quality of the produced battery cells. Attached Figure Description

[0018] The following will refer to the appendix. Figures 1-6 This section describes the features, advantages, and technical effects of exemplary embodiments of the present invention.

[0019] Figure 1 This is a schematic diagram of the battery separator sleeve structure according to an embodiment of the present invention;

[0020] Figure 2 This is an exploded view of a battery separator sleeve structure according to an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the supporting base of a battery separator sleeve structure according to an embodiment of the present invention;

[0022] Figure 4 This is a cross-sectional view of a battery separator sleeve structure according to an embodiment of the present invention;

[0023] Figure 5 This is a partially enlarged view of the battery separator sleeve structure according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the tensioning movable component of a battery separator sleeve structure according to an embodiment of the present invention.

[0025] In the diagram: 1-Motion adjustment component; 11-Adjustment handle; 12-Adjustment connecting rod; 13-Guide limiting rod; 14-Compression elastic element; 2-Support base; 201-Through hole; 21-Wedge protrusion; 211-Guide inclined surface; 212-Moving groove; 3-Tensioning movable element; 31-Arc-shaped surface; 301-First limiting groove; 32-Assembly hole; 33-Assembly inclined surface; 34-Second limiting groove; 4-Blocking element; 41-Mounting groove; 42-Fastening screw; 5-Protective outer layer; 6-Extrusion limiting element. Detailed Implementation

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is intended to particularly describe embodiments and not to limit the scope of this application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the embodiment description, "multiple" refers to two or more, unless otherwise specifically defined.

[0028] The term 'embodiment' means that a particular feature, structure, or characteristic described exists in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or multiple situations existing alone. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can also refer to a mechanical connection or an electrical connection. They can be directly connected or indirectly connected through an intermediate medium, manifesting as internal communication between two components or an interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0031] The following is in conjunction with the appendix Figures 1-6 The present invention will be described in further detail, but this is not intended to limit the scope of the present invention.

[0032] like Figure 1 and 2As shown, in one embodiment of this utility model, the battery separator sleeve structure includes a motion adjustment component 1, a support base 2, and at least one tensioning movable component 3. The support base 2 has at least one guide slope 211. Each tensioning movable component 3 is movably connected to a corresponding guide slope 211. The motion adjustment component 1 is rotatably disposed on the support base 2, and one end of the motion adjustment component 1 is drivenly connected to the tensioning movable component 3. The support base 2 has a through hole 201 inside for assembly onto a machine for separator unwinding to produce wound battery cells.

[0033] The technical solution of this utility model uses the rotational drive of the motion adjustment component to drive the tensioning movable part to move along the guide inclined surface, thereby changing the size of the outer ring of the diaphragm roll structure and achieving the characteristic of variable diameter. This facilitates the release of diaphragm elastic stress during unwinding through the cyclical movement of the tensioning movable part, thus avoiding inner ring wrinkles on the electrode due to elastic stress retraction, thereby improving the quality of the produced battery cells.

[0034] Specifically, in some implementations, such as Figure 2 and 3 As shown in Figure 6, the outer surface of the support base 2 along its axial direction is provided with a wedge protrusion 21; the guide slope 211 and the support base 2 are disposed opposite to each other on the two sides of the wedge protrusion 21; and the tensioning movable member 3 is provided with an assembly slope 33 facing the bottom of the wedge protrusion 21; the assembly slope 33 abuts against the guide slope 211; and the tensioning movable member 3 abuts against the wedge protrusion 21. The tensioning movable member 3 adopts a U-shaped structure, which abuts against the side surface of the wedge protrusion 21. This structure, through the wedge protrusion 21, provides assembly and limiting of the tensioning movable member 3, thereby playing a guiding role in changing diameter; it also improves the assembly stability of the tensioning movable member 3 and ensures the orderly guiding and conveying of the tensioning movable member 3 along the guide slope 211.

[0035] Specifically, in some implementations, such as Figure 2 and 3 As shown, there are at least two wedges 21, and all wedges 21 are arranged equidistantly along their circumferential direction. This structure, through multiple wedges 21 and their guide slopes 211, combined with corresponding tensioning actuators 3, enables rapid and uniform change of the outer ring size of the diaphragm roll structure. This facilitates the release of diaphragm elastic stress during unwinding through the cyclic movement of the tensioning actuators, preventing inner ring wrinkles on the electrode sheets due to elastic stress retraction, thereby improving the quality of the produced battery cells.

[0036] Specifically, in some implementations, such as Figure 2 and 3As shown, the wedge 21 has a movable groove 212 on its surface away from the supporting base 2; the motion adjustment component 1 includes an adjustment handle 11 and an adjustment connecting rod 12; the adjustment connecting rod 12 is disposed inside the movable groove 212; one end of the adjustment connecting rod 12 passes through the wedge 21 and is movably connected to one end of the adjustment handle 11; the other end of the adjustment connecting rod 12 is connected to the tensioning movable component 3. In some embodiments, the adjustment connecting rod 12 is an adjustment screw with a threaded circumferential surface; the adjustment handle 11 is a T-shaped adjustment handle rod, which is engaged with the inner wall of the adjustment connecting rod 12; the adjustment screw is threadedly connected to the threaded hole inside the wedge 21. This structure utilizes a rotating T-shaped adjusting handle to rotate the adjusting screw, causing it to extend and retract along the threaded hole. This, in turn, drives the tensioning actuator 3 to adjust its outer diameter along the guide slope 211, allowing for rapid changes in the outer ring size of the diaphragm roll structure. This facilitates the release of diaphragm elastic stress during unwinding through the cyclical movement of the tensioning actuator. Furthermore, the threaded connection between the adjusting screw and the internal threaded hole of the wedge 21 provides the feed rate and engagement force to maintain a stationary position. Depending on the application, each or part of the wedge 21 may have a movable groove 212, fitted with a corresponding motion adjusting component 1, to ensure orderly rotational adjustment.

[0037] Specifically, in some implementations, such as Figure 3 and 4 As shown, the motion adjustment component 1 also includes a guide limiting rod 13 and a compression elastic element 14; one end of the guide limiting rod 13 passes through the adjustment connecting rod 12 and is connected to the adjustment handle 11; the compression elastic element 14 abuts against the guide limiting rod 13 and the adjustment connecting rod 12. The compression elastic element 14 is a compression spring; the guide limiting rod 13 is a T-shaped limiting rod. This structure uses a compression spring coiled on the side surface of the T-shaped limiting rod, with both ends of the compression spring abutting against the guide limiting rod 13 and the adjustment connecting rod 12; thus, the guide limiting rod 13 guides the movement of the compression elastic element 14, and the compression elastic element 14 provides a squeezing force to make the adjustment connecting rod 12 quickly retract.

[0038] Specifically, in some implementations, such as Figure 2 , 3As shown in Figure 6, the outer surface of the tensioning movable member 3 away from the wedge protrusion 21 in the support base 2 is provided with an arc-shaped surface 31; the corresponding arc-shaped surfaces 31 of different tensioning movable members 3 are arranged sequentially around the outer surface of the support base 2 in the circumferential direction to form an outer contour of cylinder. This structure, by forming an outer contour of cylinder, can quickly and relatively uniformly change the size of the outer ring of the diaphragm roll structure; thus, it is beneficial to release the elastic stress of the diaphragm under the action of the cyclic movement of the movable member during diaphragm unwinding, so as to avoid the inner ring wrinkles of the electrode due to elastic stress retraction; thus improving the quality of the produced battery cell.

[0039] Specifically, in some implementations, such as Figure 6 As shown, the tensioning movable member 3 is provided with a second limiting groove 34 on the outer surface of the wedge protrusion 21 in the support base 2; one end of the adjusting connecting rod 12 is connected to the inner wall of the second limiting groove 34. The adjusting connecting rod 12 is a hollow, T-shaped adjusting screw. This structure, through the rotational drive of the adjusting handle 11, enables the adjusting connecting rod 12 to extend and retract threadedly, while simultaneously pushing the tensioning movable member 3 along the guide slope 211, thereby quickly and relatively uniformly changing the size of the outer ring of the diaphragm roll structure.

[0040] Specifically, in some implementations, such as Figure 1 and 2 As shown, the battery separator sleeve structure also includes a protective outer layer 5; the protective outer layer 5 is connected around the outer surface of all tensioning movable members 3 away from the supporting substrate 2. In some embodiments, the protective outer layer 5 is disposed around all the arcuate surfaces 31 to achieve a covering effect on the tensioning movable members 3, thereby ensuring that the outer surface of the entire battery separator roll structure is flat.

[0041] Specifically, in some implementations, such as Figure 2 , 3 As shown in Figure 6, a compression limiting member 6 is provided between the protective outer layer 5 and the tensioning movable member 3; each tensioning movable member 3 has a first limiting groove 301 on its outer surface away from the wedge protrusion 21 in the support base 2; the first limiting groove 301 is located in the arc direction of the arc surface 31; and the compression limiting member 6 is sleeved on the inner wall of the first limiting groove 301. The compression limiting member 6 is made of rubber band. This structure uses rubber bands to limit all tensioning movable members 3 and provides an inward compressive force to the tensioning movable members 3, ensuring that the tensioning movable members 3 are tightly attached to the guide slope 211 of the support base 2.

[0042] Specifically, in some implementations, such as Figure 1 and 2As shown, the battery separator sleeve structure also includes at least one partition 4; the partition 4 is connected to the tensioning movable member 3; and the partition 4 abuts against the support base 2. There are two partitions 4, symmetrically arranged on both sides of the support base 2, to clamp the multiple tensioning movable members 3 inside and keep them moving synchronously.

[0043] Specifically, in some implementations, such as Figure 1 and 5 As shown, the partition 4 has a mounting groove 41; a T-shaped fastening screw 42 is provided in the mounting groove 41; one end of the fastening screw 42 is connected to the tensioning movable member 3; and the inner diameter of the mounting groove 41 in the length direction is larger than the outer diameter of the fastening screw 42. In some embodiments, a first gap is provided between the partition 4 and the tensioning movable member 3, and a second gap is provided between the fastening screw 42 and the partition 4. This structure ensures a tight and secure connection between the tensioning movable member 3 and the partition 4 through the T-shaped fastening screw 42; the first gap allows for smooth movement of the tensioning movable member 3 along with the fastening screw 42; and the second gap ensures smooth upward or downward movement of the fastening screw 42; thus, the tensioning movable member 3 can move freely up and down while moving left and right.

[0044] The specific steps are as follows:

[0045] 1. Pre-winding operation of the diaphragm: First, pull out and rotate the adjusting handle 11 to adjust to the large diameter position; then, as the adjusting connecting rod 12 rotates synchronously, the tensioning movable part 3 moves in an inclined plane extension and retraction motion with the adjusting connecting rod 12, so that the entire roll reaches the large diameter state; next, the protective outer layer 5 moves outward with the tensioning movable part 3 to flatten the gap between the tensioning movable parts 3 and make the outer diameter flat; then, manually release the adjusting handle 11, and it will automatically retract to the original position; finally, place the roll on the machine for diaphragm winding.

[0046] 2. Pre-unwinding operation of the diaphragm: First, the diameter of the diaphragm roll to be loaded onto the machine is changed in advance by adjusting the adjusting handle 11 to the small diameter position; then, as the adjusting connecting rod 12 rotates synchronously, the tensioning movable part 3 moves in an inclined plane extension and retraction motion with the adjusting connecting rod 12, so that the entire roll reaches the small diameter state; next, the outer protective layer 5 retracts inward with the tensioning movable part 3, flattening the gap between the tensioning movable parts 3 to make the outer diameter flat; then, manually release the adjusting handle 11, and it automatically retracts to the original position; after the diaphragm roll is stationary for a certain period of time, the diaphragm retracts to a tension-free state; finally, the diaphragm roll (the diaphragm roll and the roll are now integrated) is placed on the machine for diaphragm unwinding to produce the winding of the battery cells.

[0047] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and 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.

[0048] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on this utility model are within the protection scope of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A battery separator sleeve structure, characterized in that: It includes a motion adjustment component, a support base, and at least one tensioning movable component; the support base is provided with at least one guide slope; the tensioning movable component is movably connected to the guide slope; the motion adjustment component is rotatably disposed on the support base, and one end of the motion adjustment component is drivenly connected to the tensioning movable component.

2. The battery separator sleeve structure according to claim 1, characterized in that: The support base is provided with a wedge; the guide slope and the support base are disposed opposite to each other on the two side surfaces of the wedge; and the tensioning movable member is provided with an assembly slope facing the bottom of the wedge; the assembly slope abuts against the guide slope; and the tensioning movable member abuts against the wedge.

3. The battery separator sleeve structure according to claim 2, characterized in that: The wedge-shaped protrusion has a movable groove on its surface away from the support base; and the motion adjustment component includes an adjustment handle and an adjustment connecting rod; the adjustment connecting rod is disposed inside the movable groove; one end of the adjustment connecting rod passes through the wedge-shaped protrusion and is movably connected to one end of the adjustment handle; the other end of the adjustment connecting rod is connected to the tensioning movable component.

4. The battery separator sleeve structure according to claim 3, characterized in that: The motion adjustment component further includes a guide limiting rod and a compression elastic element; one end of the guide limiting rod passes through the adjustment connecting rod and is connected to the adjustment handle; the compression elastic element abuts against the guide limiting rod and the adjustment connecting rod.

5. The battery separator sleeve structure according to claim 1 or 2, characterized in that: The outer surface of the tensioning movable component away from the support base is provided with an arc-shaped surface; the arc-shaped surfaces on different tensioning movable components are arranged sequentially around the outer surface of the support base in the circumferential direction to form an outer contour of cylinder.

6. The battery separator sleeve structure according to claim 3, characterized in that: The tensioning movable component is also provided with a second limiting groove on the outer surface facing the support base; one end of the adjusting connecting rod is connected to the inner wall of the second limiting groove.

7. The battery separator sleeve structure according to claim 1, characterized in that: The battery separator sleeve structure also includes a protective outer layer; the protective outer layer surrounds and is connected to the outer surface of all the tensioning moving parts away from the support base.

8. The battery separator sleeve structure according to claim 7, characterized in that: A compression limiting member is provided between the protective outer layer and the tensioning movable member; each tensioning movable member has a first limiting groove on its outer surface away from the support base; the first limiting groove is disposed on the tensioning movable member; and the compression limiting member is sleeved on the inner wall of the first limiting groove.

9. The battery separator sleeve structure according to claim 1, characterized in that: The battery separator sleeve structure further includes at least one baffle; the baffle is connected to the tensioning movable member; and the baffle abuts against the support base.

10. The battery separator sleeve structure according to claim 9, characterized in that: The partition is provided with a mounting groove; a fastening screw is provided in the mounting groove; one end of the fastening screw is connected to the tensioning movable component; Furthermore, the inner diameter of the mounting groove along its length is greater than the outer diameter of the fastening screw.

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