바이모달트램용 리튬폴리머배터리팩의 Cell Balancing 특성

초록

Bimodal tram has adopted the LPB(Lithium Polymer Battery) pack for the power saving and fast power supply which consists of 168 ~ 176 cells following the vehicle intermediate voltage(650 ~ 700Vdc). The LPB pack was discharged and charged over again when the vehicle equipped with the traction motor and the generator connected to CNG engine ran the road. Cell voltages in LPB pack will be differed by their independent electrochemical and physical differences. Cell balancing is important to maintain their capacities and lifetimes at the same level for preventing the excessive cost and safe problems. By applying the charge shunting cell balancing method to the LPB pack, this paper has investigated the cell balancing characteristics during both the vehicle running situation and the vehicle standstill in the laboratory for finding which is better effective. The result has shown more effective in the vehicle standstill than its running. The data measured when running bimodal tram on the road was illustrated in this paper.