Abstract
The external characteristics of the bi-directional power converter were designed for an electric vehicle's hybrid power system in which an ultra-capacitor group is connected to a power battery group via the converter. Based on the measurement of the discharging current of the battery group, both of the working mode and the current of the ultra-capacitor were adaptively controlled. The model of the external characteristics of the bi-directional power converter was founded, revealing the quantitative relation between the battery current and the ultra-capacitor current. Then, the control circuit of the bi-directional power converter was developed. The results of the experiments showed that the peak current of the battery in this hybrid power system was 60% lower than that of the system current, which is advantageous to enhancing the battery life time.
| Original language | English |
|---|---|
| Pages (from-to) | 747-751 |
| Number of pages | 5 |
| Journal | Gaojishu Tongxin/Chinese High Technology Letters |
| Volume | 22 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 2012 |
Keywords
- Adaptive control
- Bi-directional power converter
- Electric vehicle
- Power battery
- Ultra-capacitor
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