Lithium battery pole piece automatic winding method
A lithium battery and pole piece technology, applied in the field of automatic winding and forming of materials, can solve problems such as the lack of research on constant winding speed, fluctuations in winding materials and unstable tension, fluctuations in materials up and down, and reduction in winding quality
Active Publication Date: 2018-02-02
SOUTHEAST UNIV
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Problems solved by technology
Although the movement of the winding roller solves the fluctuation of the winding material to a certain extent, it will cause the fluctuation and tension instability of the winding material in the middle of the winding machine
[0004] In a word, although the tension control system and speed control system are widely used in automatic winding machines, the problems of material up and down fluctuation and winding quality degradation caused by the shape of the winding needle have not been effectively solved
Through the movement of the central axis, the winding material is kept horizontal and the research on the constant winding speed is still lacking.
Method used
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[0061] The present invention will be further specifically described below in conjunction with the accompanying drawings and specific embodiments.
[0062] A new type of track for the center of the spool of an automatic winder for square needles, such as figure 1 As shown, the trajectory is only related to the needle radius, the larger the needle radius, the larger the trajectory. The three heart-shaped curves in the figure are the trajectories corresponding to the radii of the square rolling needles being 60mm, 40mm, and 20mm respectively. details as follows:
[0063] According to the mechanical structure characteristics of the reel part of the winding machine, the structure of the winding machine is simplified as follows: figure 2 .
[0064] O is the middle point of the needle, O 1 is a fixed reference point on the winding machine, O 2 is the film exit point, O 3 is the film entry point.
[0065] OO 3 is a variable, the modulus is constant, and the direction changes ...
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The invention discloses an automatic winding method for a lithium battery pole piece. A square winding pin is mounted on a reel and is enabled to rotate at a constant speed to roll materials and form a heart-shaped track in a radial direction, so that the materials entering the square winding pin by winding are kept horizontal at any moment and are wound into the winding pin at a constant speed. According to the motion track provided by the invention, the problem of up-and-down fluctuation of the materials in a material winding process of a winding machine is favorably solved.
Description
technical field [0001] The invention relates to the field of automatic winding and forming of materials, in particular to an automatic winding method for winding positive and negative electrodes of a lithium battery with square needles. Background technique [0002] The automatic winding machine has significant advantages in many aspects such as the ability, quality and efficiency of winding materials, and has been more and more widely used in industries such as lithium batteries, textiles, capacitors and paper products. The tension and winding speed of the winding machine determine the quality of the finished winding product. During the winding process, it is necessary to keep the tension of the winding material constant and the winding speed uniform to avoid fluctuations in the material. Therefore, the tension control system is widely used in automatic winding machines. [0003] The winding material is wound into the winding roller smoothly, which is the key to ensure the...
Claims
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IPC IPC(8): B21C47/02
CPCB21C47/02
Inventor 韩良赵怀云
Owner SOUTHEAST UNIV