DC to DC Boost converter for lipo charging

Batteries, Chargers, and Battery Management Systems.
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Sidotian
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DC to DC Boost converter for lipo charging

Post by Sidotian » Nov 18, 2017 5:33 am

Would it be possible to create a 12s lipo charger using a 24 volt power supply and a boost converter? I seen converters on Amazon that claim to be 1500w for only 30$ and I already have two identical 12v 16amp power supplys ( from old Xbox 360s) that I have converted and seem to work fine. I also have standard household wall plug timers I could plug the two power supplies into. (Incase I ever forget to take it off the charger). But i just want an overall cheep way to charge in bulk IV seen the mean well chargers but why buy one of those when I can make one for 30$ and some DIY I use anywhere from 10ah to 32ah 12s battery so I figure charging anywhere close to 5 amps would suit my needs.

billvon
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Re: DC to DC Boost converter for lipo charging

Post by billvon » Nov 18, 2017 3:40 pm

>Would it be possible to create a 12s lipo charger using a 24 volt power supply and a boost converter?

Depends on the boost converter. You need one that will current limit on overcurrent, not hiccup. (A lot of boost converters hiccup.)
--bill von

jimbo83
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Re: DC to DC Boost converter for lipo charging

Post by jimbo83 » Nov 21, 2017 6:48 pm

Several people have posted using these successfully,

just measure your output needs against the max current input at the voltage you boost from. Even 12V @ 15A input may be sufficient for some.

https://www.ebay.com/itm/New-900W-DC-DC ... 1861952982

flat tire
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Re: DC to DC Boost converter for lipo charging

Post by flat tire » Nov 21, 2017 8:16 pm

Sure this setup can work, just be aware you may not get as much power from the boost converter as you want. For example many of the high power ones require a fairly high input voltage (40+ volts) to get the full power as they can only pass so much current thru the input stage.
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BShady
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Re: DC to DC Boost converter for lipo charging

Post by BShady » Nov 28, 2017 9:31 am

do DC-DC converters output Watts need to equal the input Watts?
I was thinking of doing this too but using the Boost converter to power a 10s BMS.

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fechter
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Re: DC to DC Boost converter for lipo charging

Post by fechter » Nov 28, 2017 9:50 am

BShady wrote:
Nov 28, 2017 9:31 am
do DC-DC converters output Watts need to equal the input Watts?
I was thinking of doing this too but using the Boost converter to power a 10s BMS.
The input watts will always be a little higher than the output due to losses. Typical efficiency is around 90%. Most of the cheap converters you see on eBay have exaggerated power ratings and will burn up if used at the stated current. Best to get one that is rated for about 2x what you actually want to run and think about adding heat sinks or fans.
"One test is worth a thousand opinions"

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