Hi all,
I'm working on a project on autism therapy, the +ME experimental device,
http://www.plusme.it/last-prototype-to-experiment-with-children/which is powered by a commercial 11.1V Lipo battery, 500mAh.
I realised right now that our commercial battery lacks of the protection circuitry preventing the cell to discharge below the safety voltage (3.0v). As far as I know, this could be very very dangerous. I tought it was a standard safety component, but it is not!
https://learn.adafruit.com/li-ion-and-lipoly-batteries/protection-circuitryAdafruit suggested me to add this protection circuit to the pack battery
http://www.all-battery.com/PCBfor11.1VLIPO_Li-Ion_Li-MnNiBatteryPack-32071.aspxbut obviously this means I need to disassemble the original pack battery, de-sold and put together again in the right way: it sounds to me not a trivial work, even because I've not experience about it.
In your opinion:
1) is it feasible for an hobbyst like me to perform such operation in safety? If yes, can you suggest some tutorial about assembling 3 lipo cells + this protection circuit?
2) I looked on google for 11.1v lipo battery 500 mAh already endowed with this protection circuit, but at the moment I found only Adafruit selling this protected battery, unfortunately only 3.7 battery. Do you know some site selling these products? It would solve my problem!
Thanks a lot. Please help me because the project is really important!
PS: some (hopefully) useful info:
-the power consumption of the device is about 110 mAh (device on, lights and sounds off), and reaches 200 mAh when all lights and sounds are on (the worst situation!). In average, it request about 150 mAh (device on and some light or sound on). We need the device to work for 1 hour, no more.