18650 12V Power Bank Series Will Not#

18650 12V Power Bank Series Will Not

Now I am ready to look at battery chemistry and the battery pack configuration. I then consider how I can charge it and what will work best for the application. When designing a battery pack I first determine what my load is, and how long I need it to operate. (reducing run time to 11 hrs 43 min))You lose current capability by using the step up because it is unlikely to be able to source theCurrent the batteries can source without it, in addition you waste energy through the silicon devicesTry this website, ' How to design battery packs, tutorial for Design Engineers' it has a good explanation of series, parallel and how to chose by: PowerStream, September 30, 2019, Engineering Guidelines for Designing Battery Packs'. (because 3 in series will not give you 12V)If you say THREE, then the resulting battery pack is a 4S3P. 'If 11.1v is unacceptable then you have to round up to FOUR 3.7V batteries to get 14.8VEven if you use 4 batteries IN SERIES, you STILL need to tell us HOW LONG THIS APPLICATIONNEEDS TO RUN CONTINUOUSLY WITHOUT POWERING DOWN.Once you tell us that , we can tell you (or you can calculate) how many 4-series battery packsIf you say FOUR, then the resulting battery pack is a 4S4P.

Assume (keeping it simple) we have 2 3Volt 1Amp batteries. Assuming the batteries are the same, the capacity increases by the amount the additional battery adds regardless if it is in series or parallel. Looking at all of the factors I make my choice.

In parallel for the most part it is swamped out. Another thing to be careful when putting them in series the weakest battery becomes the dominate factor in the battery pack. Put them in parallel we get 3Volts at 2 amps or 6 watts.

You gain nothing).And since any conversion has less than 100% efficiency, you actually LOSE capacity by up converting 2 volts to 12. If you instead put six cells in parallel, you get 6 times the capacity, but a 2 volt to 12 volt up converter will draw 6 times the current (i.e. You can get this by putting six 2 volt cells in series. You NEVER get something for nothing.Lets say you need 12 volts.