The LLC half bridge resonant power supply scheme based on EG6599 and EG4328 chips, with an input voltage of AC 220 ± 10%, can achieve intelligent charging management of 60V12A lead-acid batteries (also customizable as lithium batteries), with multiple protection functions, charging status indication, and heat dissipation design. The circuit parameters are set in a specific way, suitable for the charging field of electric tricycles and four-wheel vehicles.