一， Theory

       Theory abstract ： The theory of making power is full bridging change: firstly, AC input is entered commutate eodo proceeding first commutate strain ， generate smooth direct voltage ， then direct voltage generate radio-frequency alternate current signal by full eodo inversion, at last radio-frequency alternating current produce smooth direct current by a second commutate strain.

二 ， Charging mode and explanation

1 ．precharge phase: Charging machine sets up time delayed start-up which is 7 seconds, after    starting up, it goes to precharge phase first, which charging machine set up low current  constant- current charge priority ， charging current is 10A ， charging 6 minutes ， and it aim  toactivate battery;

2 ． strong current phase: It goes to boosting phase which is constant current 30A after precharge

3． Constant voltage phase :It goes into constant voltage charge phase when the charging voltage rises to 30.5V, and the charging current lessen gradually;

4 ． low current phase : It goes into low current phase when the charging current lessen to 9A ， and   the constant current 9A boost charge ， charging voltage will rise a little;

5 ．impulse phase It goes into impulse charging stage when the charging voltage rises to 31V ，and it will get into impulse phase automotive if the charging voltage short of 31V in 40 minute ，which fill 5 seconds and stop 5 seconds in order to supplement and maintain the battery;

6 ．floating phase It goes into floating phase automotive after impulse charging for 20 minutes ，mine while, charging machine closes down automotive.