Simple Lipo Charging solution

[jonnybump]

I'm considering putting together a 12S2P Lipo pack consisting 4 x 6S bricks @ 8000mah, giving 44.4V @ 16000mah total.

I know it's probably going to be easier going with another chemistry for ease of charging, but (in theory), would this solution work -

- Two bricks connected permanently in parallel
- These are only connected together in series when the connector is plugged into the controller using a 4 pin connector of some sort (or two XT60s together, if possible)

- Two chargers mounted onboard connected to one PSU, when the 4 pin charger connector is unplugged from the controller, the packs are no longer in series and can be charged as individual 6S2P packs

- Balance leads permanently connected to the chargers

Would this work?

Thanks
Jon

 

[DAND214]

I'm considering putting together a 12S2P Lipo pack consisting 4 x 6S bricks @ 8000mah, giving 44.4V @ 16000mah total.

I know it's probably going to be easier going with another chemistry for ease of charging, but (in theory), would this solution work -

- Two bricks connected permanently in parallel
- These are only connected together in series when the connector is plugged into the controller using a 4 pin connector of some sort (or two XT60s together, if possible)

- Two chargers mounted onboard connected to one PSU, when the 4 pin charger connector is unplugged from the controller, the packs are no longer in series and can be charged as individual 6S2P packs

- Balance leads permanently connected to the chargers

Would this work?

Thanks
Jon

You want to carry all that all the time?
So two balance chargers and a one power supply?
If so I don't see why not.

Dan

 

[jonnybump]

Yeah it wouldn't bother me. I'm used to carrying a ton of weight around with me - my daily commuter is a chunky tyred mountain bike with 48V20Ah Headways and full paniers.

Thanks for the reply

Jon

 

[friendly1uk]

It will probably smoke.

Cell 1 has it's ground tied to charger1 ground. Cell 7 has it's ground tied to charger2 ground. Then your going to tie these grounds together using a common psu. Putting a short across the first 6s.

There is only one way to do this. The same way every single manufacturer does it. Which has drove the price down till it's the cheapest way. Despite being technically superiour and idiot proof. Smaller, lighter, the list goes on. All you need is one charger and a bms board, to make charging your pack no different to charging your phone. You have basically drawn it, then added some more complexity above.

Any other way of doing it costs more, does less and leads to posts about burning the house down most years. It don't matter what EV suppliers website your looking at, you can't find the stuff your talking about because it's wrong. There are pleanty of people coming over from modelling circles happy to talk about using toy chargers, but ignore them, I can show you the precession of people dishing out the bad information, the OP thanking them for their help, then coming back after the house burned down. It infuriates me. You have gone astray down the same path. Stop and look around. Your doing it wrong.

My yginrut thread should be your next port of call. It's clear enough to of been left alone, and is based on a 12s pack construction