Abstract: It should be once checked discharge when baterries are fixed first time or when they are continuous function on float running after one year.So it should be used a device to discharge the baterries.For these cases, comparing some projects,a BUCK circuit of DC/DC transform has benn application. The performance of the device experimentation have proved it is suitable in electrical system.
Keywords: baterries、capacity、IGBT、PTC resistance、active inverter、BUCK circuit