How is the 4.5-micron lithium battery copper foil 'made'?

At present, new energy vehicles, 5G communications and other industries are booming. Benefiting from this, the market demand for copper foil, which is the upstream raw material of the industrial chain, is about to open a new blue ocean with huge market potential. As the first company in Meizhou to be recognized as a 'National Corporate Technology CenterLeading level. 4.5 micron, what is the concept? It is equivalent to 1/15 the diameter of a hair and 1/20 the thickness of a normal A4 printing paper. However, any dust particle size is 20-30 microns, and the difficulty of processing lithium battery copper foil and the requirements of the processing environment can be imagined. So, how is this ultra-thin lithium battery copper foil 'made'? The author puts on the dust-free clothes and takes you into the dust-free processing workshop to find out. In the workshop, workers are rarely seen, highly automated equipment is operating in an orderly manner, and the finished copper foil rolls are waiting to be tested. The copper foil is as thin as a cicada wing, shining dazzlingly under the light. 'Copper foil processing has to go through four processes, namely, melting copper, raw foil, post-processing, and slitting. Although it sounds easy, it is not easy to ensure that the product performance and quality meet the standards.' Jiayuan Technology Said Wang Chonghua, assistant general manager of the department. According to analysis, the first step in processing copper foil is to dissolve copper. The copper material is used in the chemical use of sulfuric acid to prepare a copper sulfate electrolyte, and the raw foil process is supplied with electrolyte that meets the process standards through circulating filtration. Immediately afterwards, in the electrolytic cell of the raw foil machine, the copper sulfate electrolyte is electrodeposited on the surface of the cathode roll under the use of direct current to make the original foil. After the continuous rotation of the cathode roll, the copper foil is continuously peeled and wound to form a roll The copper foil is shaped like a copper foil, and the surface treatment machine is used for anti-oxidation treatment to make the product quality and technical indicators meet customer requirements. 'Finally, there is a key link-the slitting process. We will use high-precision slitting equipment to cut the copper foil according to the customer's requirements for the quality, width, and weight of the copper foil. The thin lithium battery copper foil is formally 'smelted'.' Wang Chonghua said that the products processed by the company are of stable quality, strong tensile strength, elongation, compactness, thickness uniformity and other indicators have reached the domestic first-class level, so he entered Lithium battery head companies such as BYD (BYD), Dongguan New Energy Technology Co., Ltd. (ATL), CATL (CATL), etc. From 18-35 microns to 12-15 microns, and then to 8 microns, 6 microns, and 4.5 microns, with independent innovation, Jiayuan Technology can grow from a small mountain company to an industry leader that 'wrestles' with international giants. This is a vivid portrayal of the development of the copper foil industry in Meizhou. At present, there are less than 20 mainstream copper foil companies in the country, and there are 3 in Meizhou—Guangdong Jiayuan Technology Co., Ltd., Guangdong Chaohua Technology Co., Ltd., and Guangdong Weihua Group Company. The output of copper foil has reached 36,000 tons. /year. Nanfang Daily reporter Huang Taowei declares: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Are cobalt-free batteries reliable?