Electrolytic copper foil manufacturing equipment

Abstract

The invention discloses electrolytic copper foil manufacturing equipment. The electrolytic copper foil manufacturing equipment comprises an electrolytic copper foil mechanism, a stripping mechanism, acoarse roll prepressing mechanism, a high-frequency stamping mechanism, a finish roll rolling mechanism, a polishing and grinding mechanism and a collection mechanism. The high-frequency stamping mechanism comprises an elastic rolling device used for being arranged on one side of copper foil and a high-frequency stamping device used for being arranged on the other side of the copper foil. The polishing and grinding mechanism comprises a front surface polishing and grinding device used for polishing and grinding the front surface of the copper foil and a back surface polishing and grinding device used for polishing and grinding the back surface of the copper foil. The electrolytic copper foil manufacturing equipment provided by the invention is novel in design and reasonable in structure.The electrolytic copper foil manufacturing equipment strips off the electrolyzed copper foil from a cathode electrolytic roll and then conducts prepressing, high-frequency stamping, rolling and polishing to obtain the copper foil with the small mall, high surface smoothness, fewer microdefects and high density. The obtained copper foil has excellent elongation and tensile strength, is suitable forlithium batteries and can improve through quality of the lithium batteries.

Description

technical field [0001] The invention relates to the field of copper foil manufacturing, in particular to electrolytic copper foil manufacturing equipment. Background technique [0002] Electrolytic copper foil is an important material for the manufacture of copper clad laminates (CCL), printed circuit boards (PCB), and lithium-ion batteries. In the rapid development of today's electronic information industry, electrolytic copper foil is called the "neural network" of electronic product signal and power transmission and communication. Since 2002, the production value of printed circuit boards in my country has entered the third place in the world, and as the substrate material of PCBs, copper clad laminates have also become the third largest producer in the world. As a result, my country's electrolytic copper foil industry has developed by leaps and bounds in recent years. [0003] Lithium batteries use lithium ions stored in the positive electrode material and electrons to...

AI Technical Summary

Problems solved by technology

[0012] In view of the above, the copper foil in the lithium battery will have a great impact on the performance of the lithium battery: 1. The electrolytic copper foil with a rough surface has poor contact with the negative electrode active material such as graphite, and it is easy to cause the shedding of the coated active material. Directly affect battery life; 2. When the tensile strength of the copper foil is high, the copper foil is relatively hard. In the process of rolling the negative electrode containing the graphite active material, the copper foil is not deformed enough to adapt to the surface characteristics of the active material. On the contrary, when the tensile strength is low, it is easy to make the dimensional stability and flatness of the electrode deteriorate, and it is easy to cause copper foil fracture

These will lead to a decrease in the yield of negative electrode materials, affecting battery capacity, internal resistance and life; 3. The copper foil of a high-performance lithium battery must have sufficient elongation. If the elongation is low, the copper foil will generate internal stress during the rolling process. Splitting occurs, affecting battery capacity, etc.; 4. The appearance of copper foil used for lithium batteries must be clean and flat, and no streaks, surface depressions, spots, and mechanical strains are allowed, otherwise it will easily lead to a decrease in the adhesion of the copper foil, and the coating will appear. Foil leakage point, the amount of coating on both sides is different; 5. The uniformity of thickness has a direct impact on the coating amount of negative active material

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