Non-contact lithium battery diaphragm cutter shaft transmission mechanism

Abstract

The utility model relates to the technical field of non-contact transmission, and discloses a non-contact lithium battery diaphragm cutter shaft transmission mechanism which comprises a bottom plate, a first magnetic transmission wheel, a second magnetic transmission wheel and a third magnetic transmission wheel are arranged, and the second magnetic transmission wheel can be driven to rotate through magnetic force when the first magnetic transmission wheel rotates. When the second magnetic transmission wheel rotates, the third magnetic transmission wheel is driven to rotate through magnetic force, so that the third magnetic transmission wheel can drive the fixed lithium battery diaphragm cutter shaft to rotate; the first magnetic transmission wheel, the second magnetic transmission wheel and the third magnetic transmission wheel are not in contact with one another, so that the transmission noise among the first magnetic transmission wheel, the second magnetic transmission wheel and the third magnetic transmission wheel is relatively low, and metal particles cannot be generated due to friction; therefore, the problem that metal particles generated by friction during transmission may be adsorbed to the surface of a battery diaphragm to influence the isolation of positive and negative electrodes of the battery and cause short circuit of the battery is solved, and the use is relatively convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of contactless transmission, in particular to a contactless transmission mechanism for a lithium battery diaphragm knife shaft. Background Technique

[0002] In the structure of a lithium battery, the diaphragm is one of the key inner components. The performance of the diaphragm determines the interface structure, internal resistance, etc. of the battery, directly affecting the characteristics such as the capacity, cycle, and safety performance of the battery. A diaphragm with excellent performance plays an important role in improving the comprehensive performance of the battery. The main function of the diaphragm is to separate the positive and negative electrodes of the battery to prevent the two electrodes from contacting and short - circuiting. In addition, it also has the function of allowing electrolyte ions to pass through.

[0003] At present, some of the existing transmission mechanisms for lithium battery diaphragm knife shafts use gears for transmission. The transmission ratio is relatively stable, but gear transmission will generate relatively large noise and may generate metal particles during friction. The metal particles may be adsorbed on the surface of the battery diaphragm, affecting the isolation of the positive and negative electrodes of the battery and causing the battery to short - circuit, making it relatively inconvenient to use. Therefore, we propose a contactless transmission mechanism for a lithium battery diaphragm knife shaft to solve or improve the above problems. Content of the Utility Model

[0004] In view of the deficiencies of the prior art, the utility model provides a contactless transmission mechanism for a lithium battery diaphragm knife shaft, which solves the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions: including a bottom plate, a first magnetic drive wheel is rotatably installed on the top of the bottom plate through a rotating shaft, a second magnetic drive wheel is rotatably installed on the top of the bottom plate through a rotating shaft, a mounting bracket is fixed on the top of the bottom plate, a lithium battery diaphragm knife shaft is rotatably installed on the top of the mounting bracket through a rotating shaft, and a third magnetic drive wheel is fixed at the bottom of the rotating shaft of the lithium battery diaphragm knife shaft.

[0006] Furthermore, a first permanent magnet is fixed inside the first magnetic drive wheel, and several groups of the first permanent magnets are fixedly arranged in a circumferential pattern inside the first magnetic drive wheel.

[0007] Furthermore, a second permanent magnet is fixed inside the first magnetic drive wheel, and several groups of the second permanent magnets are fixedly arranged in a circumferential pattern inside the first magnetic drive wheel. The second permanent magnets are located on one side of the first permanent magnets, and one group of first permanent magnets is arranged between every two groups of second permanent magnets.

[0008] Furthermore, a driving motor is fixed at the bottom of the bottom plate, and the output shaft of the driving motor passes through the inside of the bottom plate and is fixed at the bottom of the rotating shaft of the first magnetic drive wheel.

[0009] Further, the second magnetic drive wheel is located on one side of the first magnetic drive wheel, and the distance between the second magnetic drive wheel and the first magnetic drive wheel is relatively small.

[0010] Further, the third magnetic drive wheel is located on one side of the second magnetic drive wheel, and the distance between the third magnetic drive wheel and the second magnetic drive wheel is relatively small.

[0011] Compared with the prior art, the utility model has the following beneficial effects: by arranging the first magnetic drive wheel, the second magnetic drive wheel and the third magnetic drive wheel, the second magnetic drive wheel can be driven to rotate by magnetic force when the first magnetic drive wheel rotates, and the third magnetic drive wheel can be driven to rotate by magnetic force when the second magnetic drive wheel rotates, so that the third magnetic drive wheel can drive the fixed lithium battery diaphragm knife shaft to rotate. Since the first magnetic drive wheel, the second magnetic drive wheel and the third magnetic drive wheel do not contact each other, the transmission noise between the first magnetic drive wheel, the second magnetic drive wheel and the third magnetic drive wheel is relatively small, and no metal particles are generated due to friction, thus avoiding the problem that the metal particles generated by friction during transmission may adsorb to the surface of the battery diaphragm, affecting the isolation of the positive and negative electrodes of the battery and causing battery short circuit, and it is relatively convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the utility model;

[0013] Figure 2 is a schematic structural diagram of the drive motor of the utility model;

[0014] Figure 3 is a schematic structural diagram of the first magnetic drive wheel of the utility model.

[0015] In the figure: 1, bottom plate; 2, first magnetic drive wheel; 3, second magnetic drive wheel; 4, mounting bracket; 5, lithium battery diaphragm knife shaft; 6, third magnetic drive wheel; 7, drive motor; 8, first permanent magnet; 9, second permanent magnet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figures 1 - 3, including a bottom plate 1. The first magnetic drive wheel 2 is rotatably installed on the top of the bottom plate 1 through a rotating shaft. A first permanent magnet 8 is fixed inside the first magnetic drive wheel 2. A number of groups of the first permanent magnets 8 are fixedly arranged in a circumferential manner inside the first magnetic drive wheel 2. A second permanent magnet 9 is fixed inside the first magnetic drive wheel 2. A number of groups of the second permanent magnets 9 are fixedly arranged in a circumferential manner inside the first magnetic drive wheel 2. The second permanent magnet 9 is located on one side of the first permanent magnet 8, and a group of the first permanent magnets 8 is arranged between every two groups of the second permanent magnets 9. The magnetic poles of the first permanent magnet 8 and the second permanent magnet 9 are opposite. A driving motor 7 is fixed to the bottom of the bottom plate 1. The output shaft of the driving motor 7 passes through the inside of the bottom plate 1 and is fixed to the bottom of the rotating shaft of the first magnetic drive wheel 2. The driving motor 7 can drive the first magnetic drive wheel 2 fixed to the top of the output shaft to rotate. When the first magnetic drive wheel 2 rotates, it will drive the first permanent magnet 8 and the second permanent magnet 9 fixed inside to rotate. The second magnetic drive wheel 3 is rotatably installed on the top of the bottom plate 1 through a rotating shaft. The second magnetic drive wheel 3 is located on one side of the first magnetic drive wheel 2, and the distance between the second magnetic drive wheel 3 and the first magnetic drive wheel 2 is relatively small. The internal structure of the second magnetic drive wheel 3 is the same as that of the first magnetic drive wheel 2. Therefore, when the first magnetic drive wheel 2 rotates to drive the first permanent magnet 8 and the second permanent magnet 9 inside to rotate, it will drive the adjacent second magnetic drive wheel 3 to rotate through magnetic force. Magnetic drive is an existing technology known in society at present, and no detailed description will be given here.

[0018] The mounting bracket 4 is fixed to the top of the bottom plate 1. The lithium battery separator knife shaft 5 is rotatably installed on the top of the mounting bracket 4 through a rotating shaft. The third magnetic drive wheel 6 is fixed to the bottom of the rotating shaft of the lithium battery separator knife shaft 5. The third magnetic drive wheel 6 is located on one side of the second magnetic drive wheel 3, and the distance between the third magnetic drive wheel 6 and the second magnetic drive wheel 3 is relatively small. When the second magnetic drive wheel 3 rotates, it will drive the adjacent third magnetic drive wheel 6 to rotate. When the third magnetic drive wheel 6 rotates, it will drive the fixed lithium battery separator knife shaft 5 to rotate. Through the second magnetic drive wheel 3, the rotation direction of the third magnetic drive wheel 6 can be made the same as that of the first magnetic drive wheel 2. And because the drive between the third magnetic drive wheel 6 and the second magnetic drive wheel 3 is magnetic drive rather than rigid drive, when the equipment driven by one side of the top of the lithium battery separator knife shaft 5 has an abnormality, the lithium battery separator knife shaft 5 will stop rotating due to the increased rotation resistance and will not affect the rotation of the second magnetic drive wheel 3 and the first magnetic drive wheel 2, thereby avoiding the driving motor 7 from generating abnormal high temperature or burning due to the increased rotation resistance, and the use is relatively convenient.

[0019] Working principle: When it is necessary to drive the lithium battery diaphragm cutter shaft 5 to rotate, the driving motor 7 can drive the first magnetic transmission wheel 2 to rotate. When the first magnetic transmission wheel 2 rotates, it will drive the second magnetic transmission wheel 3 to rotate through magnetic force. When the second magnetic transmission wheel 3 rotates, it will drive the third magnetic transmission wheel 6 to rotate through magnetic force. Thus, the third magnetic transmission wheel 6 can drive the fixed lithium battery diaphragm cutter shaft 5 to rotate. Since the first magnetic transmission wheel 2, the second magnetic transmission wheel 3 and the third magnetic transmission wheel 6 are magnetically transmitted and do not contact each other, the transmission noise between the first magnetic transmission wheel 2, the second magnetic transmission wheel 3 and the third magnetic transmission wheel 6 is relatively small, and no metal particles will be generated due to friction. Therefore, it is avoided that the metal particles generated by friction during transmission may be adsorbed on the surface of the battery diaphragm, affecting the isolation of the positive and negative electrodes of the battery and causing the problem of battery short circuit. It is relatively convenient to use. At the same time, since the second magnetic transmission wheel 3 and the third magnetic transmission wheel 6 are both magnetic, they can adsorb the metal particles generated by other friction transmission components, thus further reducing or avoiding the adsorption of metal particles on the surface of the battery diaphragm and further improving the quality of product production.

[0020] Although the 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 principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A contactless lithium battery diaphragm cutter shaft transmission mechanism, characterized in that: comprising a bottom plate (1); A first magnetic transmission wheel (2), the first magnetic transmission wheel (2) is rotatably mounted on the top of the base plate (1) via a rotating shaft; A second magnetic transmission wheel (3), the second magnetic transmission wheel (3) is rotatably mounted on the top of the base plate (1) via a rotating shaft; A mounting bracket (4), the mounting bracket (4) being fixed to the top of the base plate (1); A lithium battery diaphragm blade shaft (5), the lithium battery diaphragm blade shaft (5) is rotatably mounted on the top of the mounting bracket (4) via a rotating shaft; The third magnetic transmission wheel (6) is fixed to the bottom of the rotating shaft of the lithium battery diaphragm blade shaft (5).

2. A contactless lithium battery diaphragm cutter shaft transmission mechanism according to claim 1, characterized in that: A first permanent magnet (8) is fixed inside the first magnetic transmission wheel (2), and a plurality of groups of the first permanent magnets (8) are arranged and fixed on the inner circumference of the first magnetic transmission wheel (2).

3. A contactless lithium battery diaphragm cutter shaft transmission mechanism according to claim 2, characterized in that: A second permanent magnet (9) is fixed inside the first magnetic transmission wheel (2); a plurality of groups of second permanent magnets (9) are arranged and fixed on the inner circumference of the first magnetic transmission wheel (2); the second permanent magnets (9) are located on one side of the first permanent magnets (8), and a group of first permanent magnets (8) is arranged between every two groups of second permanent magnets (9).

4. The contactless lithium battery diaphragm cutter shaft transmission mechanism according to claim 1, characterized in that: A driving motor (7) is fixed to the bottom of the base plate (1), and an output shaft of the driving motor (7) passes through the inside of the base plate (1) and is fixed to the bottom of the rotating shaft of the first magnetic transmission wheel (2).

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