project center in trichy
A hybrid battery power module composed of lead
acid and LiFePO4 batteries for BLDC motor drive is proposed in this study. The
lead acid batteries are used as the basic power source and directly connected
to the motor drive without any power conversion losses. In addition, to enhance
the instant power supply capability to the motor drive, the LiFePO4 batteries
are integrated into the proposed hybrid battery power module. A two-phase
interleaved dc converter is adopted to control the power flow among the LiFePO4
batteries, lead acid batteries and the motor drive. The common power
requirement from the motor drive is designed to be totally provided by the lead
acid batteries. Once the power demand became higher than the common level, the
additional part would be instantly provided by the LiFePO4 batteries through
the interleaved dc converter. The life of the lead acid batteries can therefore
be enhanced by the high charging/discharging capability of the integrated
LiFePO4 batteries. A prototype with 500W rated power is constructed.
Corresponding experiments are carried out to verify the validity and
performance of the proposed hybrid battery power module
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