| ??? 03/11/07 02:53 Read: times |
#134698 - Confusing the numbers... Responding to: ???'s previous message |
Some chargers cause a cell voltage of up to 1.5V at full charge for a NiCd cell. Disconnect the cell from the charger and you have a voltage of about 1.45V. After about half an hour you can measure a cell voltage of 1.35V.
When discharging the cell now, the voltage drops down to 1.3V very quickly. When furtherly discharging the NiCd cell the voltage remains on a plateau of about 1.3V, rather low discharging current assumed. A fall to less than about 1.2...1.1V denotes that the NiCd cell is nearly empty. This data is valid for a fresh NiCd cell. Due to imperfections during the many chargings and dischargings of an used cell the nominal cell voltage can be up to 0.2V smaller. So, the voltage range of a NiCd cell supplying an application drawing rather small supply current is about 1.0...1.5V. Kai |
| Topic | Author | Date |
| Calculate battery lifetime | 01/01/70 00:00 | |
| Well .. | 01/01/70 00:00 | |
| calculator | 01/01/70 00:00 | |
| Calculation | 01/01/70 00:00 | |
| Aging | 01/01/70 00:00 | |
| use a buck-boost | 01/01/70 00:00 | |
| Sucking dry | 01/01/70 00:00 | |
| depends on battery type | 01/01/70 00:00 | |
| what's a buck boost? | 01/01/70 00:00 | |
| a Buck/Boost is a switcher that will make the outp | 01/01/70 00:00 | |
| Battery Life | 01/01/70 00:00 | |
| Very simple! | 01/01/70 00:00 | |
| Remember, though: | 01/01/70 00:00 | |
| So what? | 01/01/70 00:00 | |
| 1.2V | 01/01/70 00:00 | |
| Ah sorry. | 01/01/70 00:00 | |
| Confusing the numbers... | 01/01/70 00:00 | |
| Lithium Ion | 01/01/70 00:00 | |
| and 3.7V | 01/01/70 00:00 | |
| Not for beginner | 01/01/70 00:00 | |
| combine AA & AAA | 01/01/70 00:00 | |
| So, you intend to use NiCd? | 01/01/70 00:00 | |
| Not a good Idea | 01/01/70 00:00 | |
Minimum capacitiy per cell must be 1300mAh! | 01/01/70 00:00 |