Security has been improved to varying degrees. According to the information on the official website of Chutian Zhonggu Lianchuang, in order to better control product quality and trace the entire production information of lithium batteries, including raw material information, production process and process, product batch, manufacturer and date, etc., it is necessary to store key information. Inside the QR code and marked on the battery. The traditional ink jet coding technology has problems such as easy friction and easy loss of information for a long time, while laser marking has the characteristics of strong permanence, high anti-counterfeiting, high precision, strong wear resistance, safety and reliability, and can track product quality. Provide the best solution.