Recommended charger for 12s, 4.1 per cell (49.2V)?

Batteries, Chargers, and Battery Management Systems.
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Baron   100 W

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Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by Baron » Jun 27 2018 6:04pm

I'm looking for a charger for my 12s 48V 10Ah battery pack. I only want to charge to 4.1v per cell for better longevity, so 49.2V final voltage. Anyone know of a charger like this, or one I could modify to get the voltage I need? It's a lipo pack so I wouldn't mind higher charge rates, 5A or even up to 10A.

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by amberwolf » Jun 28 2018 1:46am

Some easy to setup ones, no hacking required:

Cycle Satiator by Grin Tech

Meanwell HLG series LED PSUs (see the many threads /posts about them for details)

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flippy   1 MW

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by flippy » Jun 28 2018 2:45am

dont charge harder then you absolutly need to.
also: just buy a HLG or ELG line charger. dont forget you need a A version so have trimmer pots.
PS: a 14S pack is 48V. :roll:

if you want it: i have a heavy 480W 48V HLG charger that i am not using. if you want a good deal you can send me a message.
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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by motomech » Jun 28 2018 6:44am

You might want to search my posts to see how I use a Mean Well HLG-320-48A power supply and Battery Medics to bulk charge my 12S LiPoly packs.
Motomech


'07 GT Idive 4 4.0, Q100H 201 frt. mounted, 14S Multistar LiPoly, elifebike 9-FET 20A controller. Mean Well HLG-320H-54A, Crazy Bobs on Alex DM32's 21 to 22 MPH. viewtopic.php?f=3&t=28151&p=1373714&hilit=Idrive#p13737

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by 999zip999 » Jun 29 2018 5:41pm

13s is 48v pack 14s pack is known as 52v.

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by markz » Jun 29 2018 7:43pm

No mention if its a balance charge or not!

What is the Charge C-rate of them LiPo's - If they are Hobby King then you need not trust the whole value. When I looked last night at LiPo's I did not see any 12S, so are you using two 6S in series, say 5Ah per series string then two strings in parallel to get 10Ah.

A random HK lipo I found states 5C, zippy 25C dis 5ah 5C charge

If its just an evening multi-hour charge thats fine to go with 10A for 10Ah.
But if you are guerilla charging, I say 15-20A for 10Ah, that is 2C charge rate for HK rated 5C which you take with a grain of salt, not sure what the rule of thumb is, say slice of 1/3 of what they state.

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by 999zip999 » Jun 29 2018 9:35pm

What is this for ?

Baron   100 W

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by Baron » Jun 30 2018 12:47am

Thanks all, I think I am going with the meanwell clone + battery medics solution. I also have an Imax b6 for balancing.
viewtopic.php?f=14&t=75212
https://www.ebay.com/itm/110V-to-DC-48V ... SwmfhX2b9R

As for the charge and discharge rates of lipos, I never trusted their advertised values, I always run everything at half of what they put and I haven't run into trouble so far.

Just posting this here in case it helps someone else. Thanks

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motomech   1 GW

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by motomech » Jun 30 2018 1:41am

Make sure you get these Battery Medics;
https://www.aliexpress.com/item/150W-3- ... 17404.html
All others are clones and have issues, including the ones Hobby King sells. THe black ones are particualy crappy.
Motomech


'07 GT Idive 4 4.0, Q100H 201 frt. mounted, 14S Multistar LiPoly, elifebike 9-FET 20A controller. Mean Well HLG-320H-54A, Crazy Bobs on Alex DM32's 21 to 22 MPH. viewtopic.php?f=3&t=28151&p=1373714&hilit=Idrive#p13737

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by 999zip999 » Jul 03 2018 3:07pm

What batteries are we talking about link ?

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x.l.r.8   100 W

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Re: Recommended charger for 12s, 4.1 per cell (49.2V)?

Post by x.l.r.8 » Jul 13 2018 11:16am

Why not the Luna mini and turn down the voltage to suit, I turned up my 48v to charge 52v pack.
https://electricbike.com/forum/forum/kn ... d-advanced
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