Extension device of lithium battery diaphragm

Abstract

The utility model discloses an extension device of a lithium battery diaphragm, which comprises a rack, extension rollers are mounted at two ends of the rack, and a width extension part is further arranged on the rack; the width extension part comprises a fixed part and a movable part, the lithium battery diaphragm can be extended in the direction between the extension rollers, and the width extension part is arranged, so that the diaphragm can be extended in the width direction. In the unidirectional stretching process, the microporous structure of the diaphragm may become nonuniform, so that the trafficability of lithium ions is reduced. And through a bidirectional extension method, the diaphragm can be ensured to uniformly extend in two directions, so that the uniformity of the micropore structure is kept, the passing capacity of lithium ions is greatly improved, and the electrochemical performance of the lithium battery is optimized.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery production, and specifically relates to a stretching device for a lithium battery separator. Background Technique

[0002] The main function of the lithium battery separator is to isolate the positive and negative electrodes, prevent internal short - circuit of the battery, and at the same time allow lithium ions to pass freely during the charge and discharge process. Therefore, the microstructure and mechanical properties of the separator directly affect the ionic conductivity, safety and stability of the lithium battery. In order to meet the requirements of high - performance lithium batteries, the preparation process of the separator is continuously improved and optimized, and the stretching process of the separator is particularly important.

[0003] In the related technology, the stretching of the lithium battery separator usually adopts the unidirectional stretching method. This method stretches the separator in one direction to make it extend in this direction. However, the unidirectional stretching method has significant disadvantages. That is, during the stretching process, it is easy to cause the microporous structure of the separator to be uneven, affecting its lithium - ion passing ability, and thus reducing the overall performance of the battery. In addition, unidirectional stretching may also cause the mechanical properties of the separator to be uneven, increasing the risk of the battery. Content of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides a stretching device for a lithium battery separator, which can realize the stretching of the lithium battery separator in two directions.

[0005] A stretching device for a lithium battery separator according to an embodiment of the first aspect of the utility model includes a frame. Extension rollers are installed at both ends of the frame, and the lithium battery separator is wound around the two extension rollers; a width - stretching component is further provided on the frame; the width - stretching component has at least one fixed part and one movable part; the movable part moves towards one end of the frame to complete the stretching of the lithium battery separator in the width direction.

[0006] A stretching device for a lithium battery separator according to an embodiment of the utility model has at least the following

[0007] Beneficial effects:

[0008] This device can not only extend the lithium battery separator in the direction between the extension rollers, but also enable the separator to be extended in the width direction by setting a width extension component. This two-way extension method can effectively improve the microporous structure of the separator, making it more uniform, thereby enhancing the ability of lithium ions to pass through and improving the overall performance of the lithium battery. During the unidirectional stretching process, the microporous structure of the separator may become uneven, thereby reducing the ability of lithium ions to pass through. By using the two-way extension method of the present utility model, it can ensure that the separator is uniformly extended in two directions, thereby maintaining the uniformity of the microporous structure, greatly improving the ability of lithium ions to pass through, and optimizing the electrochemical performance of the lithium battery.

[0009] According to some embodiments of the present utility model, a plurality of clamping jaws are provided on both the fixed part and the movable part. The plurality of clamping jaws can fix and grip the lithium battery separator more firmly, preventing sliding or loosening during the extension process, and ensuring that the separator remains stable during the extension process. Since a plurality of clamping jaws are provided on both the fixed part and the movable part, these clamping jaws can be evenly distributed in the width direction of the separator, thereby applying a uniform tensile force to the separator during the extension process, avoiding problems such as damage to the separator or uneven stretching caused by single-point force, and ensuring the consistent extension of the separator in two directions.

[0010] According to some embodiments of the present utility model, the two extension rollers are respectively installed at both ends of the fixed part.

[0011] According to some embodiments of the present utility model, the width extension component further includes a T-shaped seat arranged on the frame, a guide shaft is installed between the T-shaped seats, and a connecting seat is movably arranged on the guide shaft.

[0012] According to some embodiments of the present utility model, the connecting seat is fixedly connected to the movable part.

[0013] According to some embodiments of the present utility model, a drive seat is installed on one side of the movable part.

[0014] According to some embodiments of the present utility model, a driver is further installed on the frame, and the output end of the driver is connected to the drive seat.

[0015] According to some embodiments of the present utility model, both the fixed part and the movable part include a profile base body.

[0016] According to some embodiments of the present utility model, the clamping jaws are installed on the profile base body through profile nuts.

[0017] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0019] Figure 1 It is a schematic structural diagram of an extension device for a lithium battery separator.

[0020] Reference numerals: 1, fixed part; 2, movable part; 3, extension roller; 4, jaw; 5, frame; 6, driver; 21, connecting seat; 22, guide shaft; 23, T-shaped seat; 24, drive seat. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0023] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0024] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0025] Referring to Figure 1 , an extension device for a lithium battery separator includes a frame 5. Extension rollers 3 are installed at both ends of the frame 5, and the lithium battery separator is wound around the two extension rollers 3; a width extension component is further provided on the frame 5; the width extension component includes a fixed part 1 and a movable part 2, and the two extension rollers 3 are respectively installed at both ends of the fixed part 1; the movable part 2 moves towards one end of the frame 5 to complete the extension of the lithium battery separator in the width direction.

[0026] This device can not only extend the lithium battery separator in the direction between the extension rollers 3, but also enable the separator to be extended in the width direction by setting a width extension component. This two-way extension method can effectively improve the microporous structure of the separator, making it more uniform, thereby enhancing the ability of lithium ions to pass through and improving the overall performance of the lithium battery. During the unidirectional stretching process, the microporous structure of the separator may become uneven, thereby reducing the ability of lithium ions to pass through. However, through the two-way extension method of the present utility model, it can be ensured that the separator is uniformly extended in two directions, thereby maintaining the uniformity of the microporous structure, greatly improving the ability of lithium ions to pass through, and optimizing the electrochemical performance of the lithium battery.

[0027] Furthermore, a plurality of clamping jaws 4 are provided on both the fixed part 1 and the movable part 2. The plurality of clamping jaws 4 can fix and grip the lithium battery separator more firmly, preventing sliding or loosening during the extension process, and ensuring that the separator remains stable during the extension process. Since a plurality of clamping jaws 4 are provided on both the fixed part 1 and the movable part 2, these clamping jaws 4 can be evenly distributed in the width direction of the separator, thereby applying a uniform tensile force to the separator during the extension process, avoiding problems such as damage or uneven stretching of the separator caused by single-point stress, and ensuring the consistent extension of the separator in two directions.

[0028] In this embodiment, the width extension component further includes a T-shaped seat 23 provided on the frame 5. A guide shaft 22 is installed between the T-shaped seats 23, and a connecting seat 21 is movably provided on the guide shaft 22. The connecting seat 21 is fixedly connected to the movable part 2. One side of the movable part 2 is provided with a driving seat 24.

[0029] Furthermore, a driver 6 is also installed on the frame 5. The output end of the driver 6 is connected to the driving seat 24. Both the fixed part 1 and the movable part 2 include profile bases, and the clamping jaws 4 are installed on the profile bases through profile nuts.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stretching device for a lithium battery separator, comprising a frame (5), characterized in that: Both ends of the frame (5) are provided with stretching rollers (3), and the lithium battery separator is wound around the two stretching rollers (3); a width stretching component is further provided on the frame (5); The width stretching component has at least one fixed part (1) and one movable part (2); The movable part (2) moves towards one end of the frame (5) to enable the lithium battery separator to complete stretching in the width direction.

2. The extension device according to claim 1, wherein A plurality of clamping jaws (4) are provided on both the fixed part (1) and the movable part (2).

3. The extension device according to claim 1, wherein The two stretching rollers (3) are respectively installed at both ends of the fixed part (1).

4. The extension device according to claim 1, wherein The width stretching component further includes a T-shaped seat (23) provided on the frame (5), a guide shaft (22) is installed between the T-shaped seats (23), and a connecting seat (21) is movably provided on the guide shaft (22).

5. The extension device according to claim 4, characterized in that, The connecting seat (21) is fixedly connected to the movable part (2).

6. The extension device according to claim 4, characterized in that, A drive seat (24) is installed on one side of the movable part (2).

7. The extension device according to claim 6, wherein A driver (6) is further installed on the frame (5), and the output end of the driver (6) is connected to the drive seat (24).

8. The extension device according to claim 2, wherein Both the fixed part (1) and the movable part (2) include profile bases.

9. The extension device according to claim 8, wherein The clamping jaws (4) are installed on the profile base through profile nuts.

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