Ultra-small-distance winding needle structure of winding machine for lithium battery piece production

Abstract

The invention relates to an ultra-small-distance winding needle structure of a winding machine for lithium battery piece production. The ultra-small-distance winding needle structure comprises an inner rotating tower, an inner winding needle mounting shaft, inner winding needles, an outer rotating tower, an outer winding needle mounting shaft, outer winding needles, inner transmission wheels, a first inner gears, first outer gears, outer transmission wheels, second inner gears and second outer gears. According to the invention, three inner transmission wheels movably sleeve the rear part of the inner winding needle mounting shaft, one first inner gear is arranged behind each inner transmission wheel, three outer transmission wheels movably sleeve the rear portion of the outer winding needle mounting shaft, one second outer gear is arranged behind each outer transmission wheel, and the outer gears are arranged in the transmission wheels by arranging an inner meshing structure of the outer gears and the inner gears, so space is saved, and the center distance of three shafts of the winding needles is reduced; and the three first outer gears correspond to the three first inner gears in position, the three second outer gears correspond to the three second outer gears in position, the three pairs of the inner winding needles and the outer winding needles independently rotate without interference, and thus, winding precision is high, and high-precision winding of an ultra-small battery cell is achieved.

Description

technical field [0001] The invention relates to the field of lithium-ion battery manufacturing equipment, in particular to an ultra-small-distance winding needle structure of a lithium battery sheet-making and winding machine. Background technique [0002] Sheet winding machine, the full name of lithium-ion battery sheet winding machine, is a mechanical equipment used to manufacture lithium-ion batteries. Lithium-ion batteries are composed of positive and negative electrodes, diaphragms, tabs, etc. The existing sheet winding machine There are 3 pairs of winding needles in the winding machine (there are 3 inner and outer winding needles respectively, and 1 pair of inner winding needles and 1 outer winding needle is 1 pair) respectively corresponding to the 3 stations in the winding area, such as figure 1 As shown, the three stations are winding station A, gluing station B, and unloading station C. The positive and negative electrode sheets and separators are firstly wound at ...

AI Technical Summary

Problems solved by technology

However, lithium-ion batteries with a pole piece winding length less than 100 mm are now classified as ultra-small cells in the industry. For ultra-small cells, the center distance L of the existing winding needles is too large, taking up a lot of space, and the winding accuracy is not high. Unable to realize ultra-small cell winding well

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