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Subsystems
EPS
EPS Subsystem ?
EPS Subsystem supplies electric power which is provided by batteries and solar cells to each subsystems and charge batteries by using erectric power of solar cells.
EPS Circuit Configration
- Power Source
- Energy Storage
- Power Distribution
- Power Regulation & Control
Configuration of EPS Circuit Board
- Detect the voltage and current of Solar Cells
- Heat the Li+ Battery
- Detect the charge/discharge current of Battery
- Control Solar Cell Output and charge voltage of battery
- Shut down over current
- 7.0V Step Up DC-DC Converter
- 6.0V Step Up DC-DC Converter
- 5.0V Step Up-Down DC-DC Converter
- 3.3V Step Down DC-DC Converter
- Load Switch
Solar Cell
- High Efficiency of GaAs Solar Cell
- Attached on All Panel
- Supply Power to Devices and Charge Li+ Battery
Specifications of Solar Cell
| Manufacture |
Emcore (Tecster) |
| Dimensions |
38.4×63.2mm |
| Efficiency |
23.2% |
| Voltage |
2120±1.0mV |
| Current |
363mA |
Li+ Battery
- Small Size and Large Capacity
- Low Memory Efficiency and High Performance for Cycle of Charge/Discharge Battery
- 4-parallel Configuration
Specifications of Li-ion Battery
| Manufacture |
NEC-TOKIN |
| Dimensions |
33.6×8.7×47.0mm |
| Nominal Capacity |
1130mAh×4 |
| Nominal Voltage |
3.8V |
| Weight |
39.0g |
Circuit Board
Now Under Construction!!
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