And a new method is proposed to identify the pulse period and the peak pulse velocity from the smoothed seismic records,and its validity is also verified.

The testing results show that the battery performnce characteristics can be improved effectively and the time can be saved a lot by adopting multistep acid-filling and formation charging with long periodic intermittent pulse.

To the problem that the values change while using digital way to measure and display amplitude of long-period pulse in some instruments,this paper presents one way to resolve it by using delayed electronic circuit and avoiding useless point of pulse in sampling.