How to wire a Lithium Battery Pack Q

[Physics_Kid]

hi all,
i am embarking on a new project, building a outdoor rolling credenza that has TV (with air operated TV lift), cd player, small receiver, 100% wireless (power and wifi, etc).

my design calls for a battery pack that can deliver approx 5x10⁶ joules, this leaves me in the ballpark of 12v@115Ah, or 48v@29Ah
in general this is 200watt x 6hr @ 85% system efficiency.

true sine wave inverters run best at 48vdc, but a 12v inverter can also work.

(12v inverter) can i run 12v Lithium batteries in parallel if they are isolated via diodes and the charger has four independent cell chargers,
or, four 12v Lithium batteries in series for 48v (can a 4 cell charger straddle each cell in series and be ok?),
or do i source one 48v ~29Ah battery

any suggestions?

 

[Spinnor]

Get one of these,

https://www.google.com/search?sourc...t extension&aqs=chrome.0.0j69i57j0l4.6482j0j8

and use the rest of the money saved for good beer, wine or steak, enjoy your summer!

 

[Physics_Kid]

Get one of these,

https://www.google.com/search?sourceid=chrome-psyapi2&ion=1&espv=2&ie=UTF-8&q=home depot extension cords&oq=home depot extension&aqs=chrome.0.0j69i57j0l4.6482j0j8

and use the rest of the money saved for good beer, wine or steak, enjoy your summer!

hah, i will need a short cord, but it will likely be mounted to the rolling cart via a wind-up mechanism, so that when not in use i can plug it into charge the batteries.

its a project, a completely wireless project, including wireless power, wifi, and Miracast. having a cord laying across my back patio as a tether is the old way, this is the new way. if it goes well, well, it might be my 2nd job fab'ing complete solutions like this, etc.

 

[Spinnor]

There has to be something commercially available?

https://www.google.com/search?safe=...products-cc..0.26.1569.E8KI_tO4kis&gws_rd=ssl

Not cheap!

 

[Physics_Kid]

i am looking for just the batts, and ideas about design. 4 12v in parallel vs 4 12v in series vs 1 48v
delivered energy has to be around 5x10⁶joules, but i am not 100% sure if i need some headroom in there because the 200w inverter i am looking at does a shutdown at 10.5v or 42v (12v vs the 48v model, etc).

can i extract that much energy from a 48v ~29Ah batt, or four 12v ~29Ah batts w/o the batt voltage reaching shutdown threshold of inverter?