description:
In order to effectively improve the service life of the lead-acid battery and realize the monitoring of the charging process, a 36 V lead-acid battery charging power source controlled by a single-chip microcomputer was designed. This circuit adopts flyback topology, continuous current working mode, and power management IC is designed on the secondary side of power supply. It is simulated by ELAN's EM78P258N single-chip microcomputer. It is a successful simulation of power management IC with programmable device to realize the low cost of intelligent power supply. Try to realize the status display, charging time control, alarm, over temperature protection, over voltage protection, over current protection and other functions of the charging power supply through the software design of the single chip microcomputer. The charger truly realizes the three-stage charging process of lead-acid battery, and its maximum output power can reach 90 W, the efficiency is about 85%, the cost is less than 20 yuan, and it has high market competitiveness.
In order to extend the life of lead-acid battery efficiently and supervise the charging process, a 36V lead-acid battery charge powe supply controlled by microcontroller is designed. The charger is flyback switching power supply and works in CCM mode. A EM78P258N microcontroller Made by ELAN microelectronics corporation is used as power management IC which is designed at the secondary circuit. The project is a successful attempt to low-cost intelligent power used microcontroller simulating power management IC. The charger also has the functions of the status reveal, charge Time control, alarming, thermal protect, current limit and overvoltage protect by the software design. The circuit actually implements the three-step charge process, whose power is up to 90W and whose efficiency can get 85%. The net cost of this charger is Less than 20 RMB, so that the charger is of powerful market competitiveness.
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