Multi-tooth prestressed roll core pipe

Abstract

The utility model discloses a multi-tooth prestress roll core pipe, and relates to the technical field of roll core pipes, the multi-tooth prestress roll core pipe comprises a roll core pipe body, a reinforcing structure is arranged in an inner cavity of the roll core pipe body, a buffer assembly is fixedly connected to the outer surface of the roll core pipe body, and the buffer assembly comprises a plurality of buffer bags fixedly connected to the outer side wall of the roll core pipe body. Through cooperative arrangement of the buffer bag, the exhaust hole, the rubber plate, the roll core pipe body and other structures, when internal stress in the battery film rolling process is too large, the internal stress can extrude the rubber plate to be bent and deformed along the arc-shaped bending groove, so that air in the buffer bag is exhausted through the exhaust hole, the size of the buffer bag is reduced, and the service life of the battery film is prolonged. The problems that after the battery thin film is rolled by an existing core rolling pipe, certain internal stress exists in the rolled thin film, the internal stress cannot be released for a long time, the battery thin film is reversely deformed, and the quality of the battery thin film is affected are solved as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of core-rolling tubes, and in particular to a multi-tooth prestressed core-rolling tube. Background Art

[0002] The battery separator is a polymer film that is formed through a special process. In the power battery, the positive and negative electrodes of the battery can be separated by this film, and the ions in the electrolyte can pass through the separator to achieve discharge. The battery separator is stored in a rolled form during production. After the separator is produced, it is stored and transported by rolling the separator onto a winding core tube.

[0003] When the battery film is rolled up, as the thickness of the rolled battery film increases, the rolling tension on the outer layer of the battery film gradually increases. After rolling up, there is a certain internal stress in the roll. Failure to release the internal stress for a long time will cause irreversible deformation of the battery film, and in severe cases, the battery film may be damaged. Utility Model Content

[0004] The utility model aims to solve or at least alleviate the problem that after the existing winding core tube rolls up the battery film, a certain internal stress exists in the rolled-up film, and the internal stress cannot be released for a long time, which will cause the battery film to undergo reverse deformation and affect the quality of the battery film.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-tooth prestressed winding core tube comprises a winding core tube body, a reinforcement structure is arranged in the inner cavity of the winding core tube body, a buffer assembly is fixedly connected to the outer surface of the winding core tube body, the buffer assembly comprises a plurality of buffer capsules fixedly connected to the outer wall of the winding core tube body, the plurality of buffer capsules are evenly distributed around the outer surface of the winding core tube body, a rubber plate is arranged in the inner cavity of each buffer capsule along the length direction of the buffer capsule, two sides of the rubber plate are respectively fixedly connected to the inner wall of the buffer capsule and the outer surface of the winding core tube body, and exhaust holes connected to the inner cavity of the buffer capsule are also opened on the inner walls at both ends of the buffer capsule.

[0007] By adopting the above technical scheme, when in use, the user first aligns the limiting groove on the reinforcement tube with the protrusion provided on the external transmission shaft, sets the reinforcement tube sleeve on the external transmission shaft, and then fixes the starting end of the battery film in the gap between two adjacent buffer bags, and the winding core tube body can be driven to rotate by the external transmission shaft, and the battery film is rolled up on the buffer bag provided on the outer surface of the winding core tube body, and the buffer bag is supported by a rubber plate. When the internal stress of the battery film is too large during the winding process, the internal stress can squeeze the rubber plate to bend and deform along the arc bending groove, thereby discharging the air inside the buffer bag through the exhaust hole, reducing the volume of the buffer bag, so as to eliminate the internal stress of the battery film, and try to avoid the problem that after the existing winding core tube rolls up the battery film, a certain internal stress exists in the rolled film, and the internal stress cannot be released for a long time, which will cause the battery film to undergo reverse deformation, thereby affecting the quality of the battery film.

[0008] Optionally, the reinforcement structure includes two annular reinforcement steel rings arranged in the inner cavity at both ends of the winding core tube body, the outer diameter of the reinforcement steel ring is equal to the inner diameter of the winding core tube body, the reinforcement steel ring is embedded in the inner cavity at the end of the winding core tube body and bonded to the inner wall of the winding core tube body.

[0009] By adopting the above technical solution, reinforcing steel rings are arranged in the inner cavities at both ends of the core tube body to support the ends of the core tube body, thereby improving the compressive resistance of the ends of the core tube body and avoiding deformation of the ends of the core tube body when subjected to external forces such as impact.

[0010] Optionally, the reinforcement structure also includes a reinforcement tube embedded in the inner cavity of the winding core tube body between two reinforcement steel rings, a support rod is fixedly connected to the circumference of the reinforcement tube, and one end of the support rod away from the reinforcement tube is fixedly connected to the inner wall of the middle section of the winding core tube body.

[0011] By adopting the above technical solution, a reinforcement tube and a support rod are provided to support the middle section of the core tube body, thereby improving the compressive resistance of the middle section of the core tube body and avoiding compression deformation of the middle section of the core tube body as much as possible.

[0012] Optionally, a limiting groove for clamping the reinforcing tube to the external transmission shaft is provided on the inner wall of the reinforcing tube, and the limiting groove penetrates the reinforcing tube along the length direction of the reinforcing tube.

[0013] By adopting the above technical solution, after the reinforcement tube is sleeved on the external transmission shaft, the protrusion on the external transmission shaft can be clamped through the limiting groove to prevent relative rotation between the reinforcement tube and the external transmission shaft, thereby affecting the winding of the battery film.

[0014] Optionally, the buffer capsule has an arc-shaped structure, and a gap is left between two adjacent buffer capsules for fixing the starting end of the battery separator.

[0015] By adopting the above technical solution, the user can fix the starting end of the battery diaphragm in the gap left between two adjacent buffer bags during use, so as to prevent the starting end of the battery diaphragm from always protruding from the surface of the winding core tube during the subsequent winding process. That is, the battery diaphragm will form a convex ridge on the surface of the winding core tube, and the convex ridge will be subjected to a large extrusion force, which may easily cause damage to the battery diaphragm.

[0016] Optionally, a protective film with an arc-shaped structure is attached to the outer surface of each buffer capsule, and the protective film is bonded to the buffer capsule.

[0017] By adopting the above technical solution, an arc-shaped protective film is pasted on the outer surface of the buffer capsule to separate the battery film from the buffer capsule through the protective film, thereby avoiding direct contact between the outer surface of the buffer capsule and the battery film, which may easily damage the battery film.

[0018] Optionally, the rubber plate is a plate-shaped structure, and arc-shaped bending grooves are provided on both sides of the rubber plate.

[0019] By adopting the above technical solution, an arc-shaped bending groove is opened on the rubber plate, so that the rubber plate can be bent and deformed along the arc-shaped bending groove after being subjected to the internal stress of the battery film, thereby discharging the air inside the buffer bag through the exhaust hole, reducing the volume of the buffer bag, and eliminating the internal stress of the battery film.

[0020] In summary, the beneficial effects of this application are as follows:

[0021] The present application coordinates the structures such as the buffer bag, the exhaust hole, the rubber plate and the winding core tube body. When the internal stress of the battery film is too large during the winding process, the internal stress can squeeze the rubber plate to bend and deform along the arc bending groove, thereby discharging the air inside the buffer bag through the exhaust hole, reducing the volume of the buffer bag and eliminating the internal stress of the battery film. This avoids the problem that after the existing winding core tube rolls up the battery film, a certain internal stress exists in the rolled film. The problem that the internal stress cannot be released for a long time will cause the battery film to undergo reverse deformation, thereby affecting the quality of the battery film. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall cross-sectional structure of this application;

[0023] Figure 2 It is a schematic diagram of the connection between the coiled core tube body and the reinforcement structure of the present application;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the reinforcement pipe of the present application.

[0025] Explanation of the accompanying drawings: 1. winding core tube body; 2. reinforcement steel ring; 3. reinforcement tube; 4. support rod; 5. limiting groove; 6. buffer bag; 7. exhaust hole; 8. rubber plate; 9. protective film. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-3 This application is described in further detail.

[0027] See also Figure 1-3 A multi-tooth prestressed winding core tube includes a winding core tube body 1 for being sleeved on an external transmission shaft. When the external transmission shaft rotates, it can drive the winding core tube body 1 to rotate synchronously. At this time, the user fixes the starting end of the battery film on the winding core tube body 1, and the battery film can be rolled up on the winding core tube body 1.

[0028] A reinforcement structure is provided in the inner cavity of the winding tube body 1. By reinforcing the interior of the winding tube body 1 through the reinforcement structure, deformation of the winding tube body 1 caused by external pressure can be avoided as much as possible, thereby affecting the storage and transportation of the battery film.

[0029] A buffer assembly is fixedly connected to the outer surface of the winding core tube body 1 . The buffer assembly includes a plurality of buffer capsules 6 fixedly connected to the outer side wall of the winding core tube body 1 . The plurality of buffer capsules 6 are evenly distributed around the outer surface of the winding core tube body 1 .

[0030] A rubber plate 8 is provided in the inner cavity of each buffer bag 6 along the length direction of the buffer bag 6 , and two sides of the rubber plate 8 are fixedly connected to the inner wall of the buffer bag 6 and the outer surface of the winding core tube body 1 respectively, so that the rubber plate 8 can support the buffer bag 6 .

[0031] The inner walls at both ends of the buffer capsule 6 are provided with exhaust holes 7 which are connected to the inner cavity of the buffer capsule 6. When the buffer capsule 6 is subjected to external stress, the rubber plate 8 arranged inside can be squeezed and deformed. At this time, the air inside the buffer capsule 6 is discharged through the exhaust holes 7, so that the volume of the buffer capsule 6 is reduced to release the internal stress of the battery film itself rolled up on the outer surface of the buffer capsule 6.

[0032] Reference Figure 1 The reinforcement structure includes two annular reinforcement steel rings 2 arranged in the inner cavities at both ends of the core tube body 1. The outer diameter of the reinforcement steel ring 2 is equal to the inner diameter of the core tube body 1. The reinforcement steel ring 2 is embedded in the inner cavity at the end of the core tube body 1 and adhered to the inner wall of the core tube body 1. The reinforcement steel rings 2 are arranged in the inner cavities at both ends of the core tube body 1 to support the ends of the core tube body 1, improve the compressive performance of the ends of the core tube body 1, and at the same time, can minimize the deformation of the ends of the core tube body 1 when the ends are subjected to external forces such as impact.

[0033] Reference Figure 1The reinforcement structure also includes a reinforcement tube 3 embedded in the inner cavity of the core tube body 1 between the two reinforcement steel rings 2, and a support rod 4 is fixedly connected to the circumference of the reinforcement tube 3, and one end of the support rod 4 away from the reinforcement tube 3 is fixedly connected to the inner wall of the middle section of the core tube body 1. The reinforcement tube 3 and the support rod 4 are provided to support the middle section of the core tube body 1, improve the compressive performance of the middle section of the core tube body 1, and try to avoid the middle section of the core tube body 1 from being compressed and deformed.

[0034] Reference Figure 2 The inner wall of the reinforcing tube 3 is provided with a limiting groove 5 for clamping the reinforcing tube 3 on the external transmission shaft, and the limiting groove 5 penetrates the reinforcing tube 3 along the length direction of the reinforcing tube 3. When the reinforcing tube 3 is sleeved on the external transmission shaft, the limiting groove 5 can be clamped with the protrusion on the external transmission shaft to prevent the reinforcing tube 3 and the external transmission shaft from rotating relative to each other, thereby affecting the winding work of the battery film.

[0035] Reference Figure 3 The buffer capsule 6 is an arc-shaped structure, and a gap is left between two adjacent buffer capsules 6 for fixing the starting end of the battery separator. When in use, the user can fix the starting end of the battery separator in the gap left between the two adjacent buffer capsules 6 to prevent the starting end of the battery separator from always protruding from the surface of the winding core tube during the subsequent winding process, that is, the battery separator will form a convex ridge on the surface of the winding core tube, and the convex ridge will be subjected to a large extrusion force, which is easy to cause the battery separator to be damaged.

[0036] Reference Figure 1 The outer surface of each buffer capsule 6 is affixed with an arc-shaped protective film 9, which is bonded to the buffer capsule 6. The arc-shaped protective film 9 is affixed to the outer surface of the buffer capsule 6 to separate the battery film from the buffer capsule 6 through the protective film 9, so as to avoid direct contact between the outer surface of the buffer capsule 6 and the battery film, which may easily damage the battery film.

[0037] Reference Figure 3 The rubber sheet 8 is a plate-shaped structure, and arc-shaped bending grooves are provided on both sides of the rubber sheet 8. The arc-shaped bending grooves are provided on the rubber sheet 8, so that the rubber sheet 8 can be bent and deformed along the arc-shaped bending grooves after being subjected to the internal stress of the battery film, so that the air inside the buffer capsule 6 is discharged through the exhaust hole 7, the volume of the buffer capsule 6 is reduced, and the internal stress of the battery film is eliminated.

[0038] The implementation principle of the present application is as follows: when in use, the user first aligns the limiting groove 5 on the reinforcement tube 3 with the protrusion set on the external transmission shaft, sleeves the reinforcement tube 3 on the external transmission shaft, and then fixes the starting end of the battery film in the gap between two adjacent buffer capsules 6, and then the winding core tube body 1 can be driven to rotate by the external transmission shaft, and the battery film is rolled up on the buffer capsule 6 set on the outer surface of the winding core tube body 1, and the buffer capsule 6 is supported by the rubber plate 8. When the internal stress of the battery film is too large during the winding process, the internal stress can squeeze the rubber plate 8 to bend and deform along the arc bending groove, thereby discharging the air inside the buffer capsule 6 through the exhaust hole 7, reducing the volume of the buffer capsule 6, so as to eliminate the internal stress of the battery film, and try to avoid the problem that after the existing winding core tube rolls up the battery film, a certain internal stress exists in the rolled film, and the internal stress cannot be released for a long time, which will cause the battery film to undergo reverse deformation, thereby affecting the quality of the battery film.

[0039] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A multi-tooth prestressed winding core tube, comprising a winding core tube body (1), wherein a reinforcement structure is provided in the inner cavity of the winding core tube body (1), and a buffer component is fixedly connected to the outer surface of the winding core tube body (1), characterized in that: The buffer assembly comprises a plurality of buffer capsules (6) fixedly connected to the outer wall of the winding core tube body (1), the plurality of buffer capsules (6) being equidistantly distributed around the outer surface of the winding core tube body (1), a rubber plate (8) being provided in the inner cavity of each buffer capsule (6) along the length direction of the buffer capsule (6), the two sides of the rubber plate (8) being respectively fixedly connected to the inner wall of the buffer capsule (6) and the outer surface of the winding core tube body (1), and exhaust holes (7) communicating with the inner cavity of the buffer capsule (6) being provided on the inner walls at both ends of the buffer capsule (6).

2. A multi-tooth prestressed winding core tube according to claim 1, characterized in that: The reinforcement structure comprises two reinforcing steel rings (2) of annular structure arranged in the inner cavities at both ends of the winding core tube body (1); the outer diameter of the reinforcing steel ring (2) is equal to the inner diameter of the winding core tube body (1); the reinforcing steel ring (2) is embedded in the inner cavity at the end of the winding core tube body (1) and is bonded to the inner wall of the winding core tube body (1).

3. The multi-tooth prestressed winding core tube according to claim 2, characterized in that: The reinforcement structure further comprises a reinforcement tube (3) embedded in the inner cavity of the winding core tube body (1) between the two reinforcement steel rings (2); a support rod (4) is fixedly connected to the circumference of the reinforcement tube (3); and one end of the support rod (4) away from the reinforcement tube (3) is fixedly connected to the inner wall of the middle section of the winding core tube body (1).

4. The multi-tooth prestressed winding core tube according to claim 3, characterized in that: A limiting groove (5) for clamping the reinforcing tube (3) on an external transmission shaft is provided on the inner wall of the reinforcing tube (3), and the limiting groove (5) penetrates the reinforcing tube (3) along the length direction of the reinforcing tube (3).

5. The multi-tooth prestressed winding core tube according to claim 1, characterized in that: The buffer capsule (6) has an arc-shaped structure, and two adjacent buffer capsules (6) are provided with a gap for fixing the starting end of the battery separator.

6. The multi-tooth prestressed winding core tube according to claim 5, characterized in that: A protective film (9) with an arc-shaped structure is attached to the outer surface of each buffer capsule (6), and the protective film (9) is bonded to the buffer capsule (6).

7. The multi-tooth prestressed winding core tube according to claim 1, characterized in that: The rubber plate (8) is a plate-shaped structure, and arc-shaped bending grooves are provided on both sides of the rubber plate (8).

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