In the battery production process, the effect of screen printing will directly affect the conversion efficiency of the battery, and the printing core is the aspect ratio of the silver paste after printing. Therefore, the screen, silver paste and scraper must remain innovative, when writing higher screen printing requirements, the requirements of the brake line are becoming more and more fine, has been from the initial 60um into the current 30um, or even finer; Then replace the scraper, and now unilateral photovoltaic carbon fiber scraping is becoming more and more popular!