Method for winding and roll-coating element

Abstract

The invention discloses a method for winding and roll-coating an element. The method comprises the following steps: clamping electrolytic paper between an anode foil and a cathode foil, and then winding by taking a winding core as an axis; enabling at least one of the anode foil, the cathode foil and the electrolytic paper to be subjected to electrolyte roll coating before entering the roll core, wherein the anode foil, not immersing the cathode foil or the electrolytic paper in the electrolyte during roll coating; and after winding to a preset length, stopping roller coating of the electrolyte, cutting the anode foil, the cathode foil and the electrolytic paper, and finally fixing the winding tail end. According to the invention, the anode foil, the cathode foil or the electrolytic paper is not immersed in the electrolyte during roll coating, namely is not immersed below the liquid level of the electrolyte, so that the problem that the element composition material belt is easy to crack or micro-crack in the traction process due to the fact that the element composition material belt absorbs excessive electrolyte after being immersed in the electrolyte can be avoided; and the problem that the composition material belt cannot be continuously used due to the fact that the composition material belt is still immersed in the electrolyte and excessively adsorbs the electrolyte after shutdown or shutdown is solved.

Description

technical field [0001] The invention relates to the technical field of element winding, in particular to a method for element winding and rolling coating. Background technique [0002] For wound capacitors or wound batteries, in the conventional winding process, the anode foil and cathode foil are respectively stacked with electrolytic paper to form a "element", and the winding is fixed by electronic tape or electronic glue. At the end, in the next impregnation process, the elements are vacuumed and immersed in the electrolyte, so that the electrolytic paper can soak the electrolyte and have capacitance, but this impregnation process takes a long time, and there are problems of insufficient impregnation. Hidden danger. In response to this problem, the industry has proposed a winding and impregnation integrated process element manufacturing method, that is, the impregnation process is combined with the winding process, and the installation of the entire impregnation device i...

AI Technical Summary

Problems solved by technology

[0004] In the existing winding and impregnation integrated process, there are generally two methods for the impregnation process: one is to completely immerse the material strips such as winding tape, electrolytic paper, electrode tape, and electrode foil in the electrolyte solution before winding. Wetting while pulling, but because the strip is completely submerged in the electrolyte, it is easy to over-adsorb the electrolyte and cause the problem of rupture or cracks during the pulling process. The defect rate is high, and it is not conducive to the consistency of the performance of the whole batch of finished products. When the machine is shut down or the work is stopped, the tape is still submerged in the electrolyte and the electrolyte is excessively absorbed, causing the tape to be unusable and easily torn by traction. Even if it can be made, it will also affect the relationship between the finished products unanimous

The other is to spray the electrolyte on the strip through the nozzle. Spraying through the nozzle can better control the spraying position and the amount of spraying. However, due to the small size of the strip, the nozzle used is a micro-spray. The channel is relatively small, and the composition characteristics of the electrolyte itself make the channel of the nozzle prone to crystallization and clogging, resulting in inconsistent spraying volume, especially when the residual electrolyte in the nozzle channel does not flow during the shutdown period, it is more likely to crystallize and clog; and When switching the material strips of different specifications, the nozzle assembly needs to be disassembled accordingly, the process is cumbersome and complicated, and the cost increases; moreover, after a period of use, there is crystallization blockage, because it is a micro nozzle, it is difficult to clean, generally only Replacement is a consumable item and the maintenance cost is high

Images