Research on Current Waveform Modulation of Battery Cascade Charging Power Supply

As the development of electromagnetic launch (EML) technology, the performance requirements of the primary charging system are more and more stringent. In the EML experiments, the primary charging power supply should not only provide high power output as high repetition frequency, but also provide accurate output waveform of charging current and voltage. Battery cascade charging power supply (BCCPS) is a kind of primary energy storage equipment and charging power supply that can provide high voltage and large current output. But the output current and voltage are restricted by the parameters of the system circuit and the number of the battery cascade level, so that it is inconvenient to modulate the output current and the BCCPS isn’t used widely in other applications. In this paper, a further introduction of the work principle was given out, the theoretical analysis of the charging circuit was introduced and the parameters of the charging circuit are calculated. The new time sequence control mode which can regulate the work time discretionarily of every battery cascade level is designed, so that the output current waveform can be modulated by set different time sequence. The new control mode is used in the BCCPS prototype and the experiment results proved that the control strategy is effective and the performance of the BCCPS is enhanced.