LV2 Power Consumption
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| Xref: | AandTBatteriesLv2, BatteryPackLv2, BatteryPack |
LV2 Current Consumption
Note: This table was created using a 12Vnom battery pack. This has now changed as of 2004/06/15, since we're switching to a 14.4Vnom Li Ion pack. Thus for nodes with DC-DC converters, these numbers should go down a bit.
| System | Imin | Iavg | Imax | Validity |
|---|---|---|---|---|
| ATV: CAN Node (idle) | 0.035 | Measured | ||
| ATV: Camera | 0.125 | Measured | ||
| ATV: Overlay board | 0.053 | Measured | ||
| ATV: 1.27 GHz FM TX | 0.122 | Measured | ||
| ATV: 1.3 GHz Power Amp | 1.211 | Measured | ||
| - | ||||
| FC: PC104 Stack | 0.415 | Measured | ||
| FC: 802.11b PCMCIA | ? | - | ||
| FC: 2.4GHz Power Amp | 0.629 | .900 | Measured, data sheet | |
| - | ||||
| APS: CAN Node | 0.012 | 0.047 | Measured | |
| - | ||||
| GPS: CAN node | 0.025 | Measured | ||
| GPS: GPS (low pwr mode) | 0.092 | Measured | ||
| GPS: 1.5 GHz preamp | 0.125 | Measured | ||
| - | ||||
| IMU: CAN node | 0.025 | Measured | ||
| IMU: IMU | 0.070 | Measured | ||
| - | ||||
| REC: CAN node | ? | - | ||
| REC: 2m board | ? | - | ||
| REC: HAP battery Chrgr | ? | - | ||
| - | ||||
| TOTAL | 2.85 | - |
Energy (and thus battery capacity) Consumption
A long time ago (2001) we tried to predict how many amp-hours (Ah) of battery capacity we'd need. Surprisingly, that estimate is still pretty accurate, at least in the worst case sense. Attached are the MS Word 2000 doc and a PDF of that studdy. Summary: about 3.6 Ah, which we (of course) rounded up to 4 Ah. You can ignore the outdated battery chemsitry discussion that follows at the end.