Regbot maintenance: Difference between revisions
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Lithium batteries has a longer life when stored at the nominal voltage (50% charged), so we try to keep this when robots are not used. | Lithium batteries has a longer life when stored at the nominal voltage (50% charged), so we try to keep this when robots are not used. | ||
Lithium batteries will be destroyed or damaged if discharged below 3.2V per cell (9. | Lithium batteries will be destroyed or damaged if discharged below 3.2V per cell (9.6V if all cells are equal - and they are typically not). | ||
The build-in charger is of different types (internally), and some of then discharge the battery, when not charging. They discharge with between 0.5 to 5 mA. i.e a fully charged battery is drained after between 200 and 2000 hours. Typically one cell will be dead after 1-2 month of no use, if the charger is connected. | The build-in charger is of different types (internally), and some of then discharge the battery, when not charging. They discharge with between 0.5 to 5 mA. i.e a fully charged battery is drained after between 200 and 2000 hours. Typically one cell will be dead after 1-2 month of no use, if the charger is connected. | ||
Revision as of 13:10, 31 December 2018
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Battery maintenance
The battery is a 3-cell Lithium polymer type with a capacity of 1Ah and a nominal voltage of 11.1 V.
Lithium batteries has a longer life when stored at the nominal voltage (50% charged), so we try to keep this when robots are not used.
Lithium batteries will be destroyed or damaged if discharged below 3.2V per cell (9.6V if all cells are equal - and they are typically not).
The build-in charger is of different types (internally), and some of then discharge the battery, when not charging. They discharge with between 0.5 to 5 mA. i.e a fully charged battery is drained after between 200 and 2000 hours. Typically one cell will be dead after 1-2 month of no use, if the charger is connected.
After charging a battery with a leaky charger, remove the charge cable as shown in figure below.
Figure 1. Some of the chargers destroy the battery when unused for a period of time, so on most robots the charge cable is disconnected. Reconnect to charger when needed.
Battery on-time
The robot typically uses 100mA - when not moving - and thus 5-10 hours use on a fully charged battery.
