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On November 22, 2023, at the Gold Foil Award Ceremony of the 3rd Power Battery Composite Current Collector Conference held in Shenzhen, Beijing Powertech won the title of “2023 Composite Current Collector High-Quality Coating Equipment Enterprise” with its advanced technology and excellent quality.

Current collector is one of the indispensable components in lithium-ion batteries. It can not only carry active materials, but also collect and output the current generated by electrode active materials, which is beneficial to reducing the internal resistance of lithium-ion batteries and improving the Coulombic efficiency of the battery. , cycle stability and rate performance. Currently, lithium-ion batteries use aluminum foil for the positive electrode and copper foil for the negative electrode.

Lithium batteries are developing towards high energy density and high safety, and lithium battery current collectors are developing towards thinner, microporous, high tensile strength and high elongation. High conductivity, high stability, strong bonding, low cost, flexibility and thinness are the core demands of battery manufacturers for current collectors. Composite current collectors are potential new lithium battery current collector materials. The composite current collector includes composite aluminum foil used in the positive electrode and composite copper foil used in the negative electrode.

Composite current collector is a composite material that uses plastic films such as PET/PI/PP as the base film and undergoes vacuum coating and other processes to deposit copper/aluminum molecules on both sides. Compared with traditional current collectors, composite current collectors have the advantages of high safety, high energy density, low cost, long life, and strong compatibility.