Hello, i'm new here and was hoping someone could help me with my school project. I want to be able to charger and power my board with lithium-ion batteries. I was thinking of using this battery: LG Chem Li-Ion 18650 Cylindrical 3.7V 2600mAh Rechargeable Battery ( Optional Tabs). I calculated the estimated watt/hour i would need is 28.8. Using the mock up design i drew-up and attached below, i figure i'll take 4 batteries and put them 2 in parallel then in series. This would give an estimated output of 7.4V and 5.2aH which would give me a total of ~38.5 watt/hour. I have a few questions about this design.
- Would it matter if the cells match? I'm guessing so cause if i had one at 3.7 and the other at 3.6 it would drain the 3.7V, correct?
- Would it be more cost efficient to buy 4 batteries like this or is there some type of pack with this design already made that someone can link me to?
- Like I stated this would power my board when it is not plugged into the wall charger. But if it is, it would charge the batter pack. How can I add something (i'm guessing a switch) to cut the charge going to this battery pack if it starts to heat up (to prevent explosions and/or a fire)
If I am unclear on anything please let me know, thanks a lot!
**broken link removed**
- Would it matter if the cells match? I'm guessing so cause if i had one at 3.7 and the other at 3.6 it would drain the 3.7V, correct?
- Would it be more cost efficient to buy 4 batteries like this or is there some type of pack with this design already made that someone can link me to?
- Like I stated this would power my board when it is not plugged into the wall charger. But if it is, it would charge the batter pack. How can I add something (i'm guessing a switch) to cut the charge going to this battery pack if it starts to heat up (to prevent explosions and/or a fire)
If I am unclear on anything please let me know, thanks a lot!
**broken link removed**
Last edited: