Hi.

I would like to seek your fruitful discussion and opinion about the above topic.

The circuit is divided into two stage of ac-dc and dc-dc converter to charge the battery. the front end converter is three phase ac-dc diode bridge converter (200Vac line-line, 50Hz). The output of the rectifier then will be fed to the isolated dc dc converter. I would like to know which is the better converter topology to be employed for the battery charging system? Conventional phase shifted full bridge or LLC resonant full bridge with frequency modulation? the target output power is 20KW to charge the battery for about 2 hours.

Thanks mate!

 

As long as the charging voltage characteristics of the battery is being met the design of the power source itself is irrelevant.