Opinions on 48v Lipo bulk charger

Batteries, Chargers, and Battery Management Systems.
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midcitybikesbrla   100 µW

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Opinions on 48v Lipo bulk charger

Post by midcitybikesbrla » Nov 19 2013 2:18pm

The current plan is to use 12 or 16 of the HobbyKng 6 cell 8000mAh Lipos, looking for bulk charging options.
From the reading I have done on here it seems like this would be a really good option if not a bit overkill for my purpose.
http://www.mastechpowersupply.com/dc-po ... od_59.html
Are there any less expensive options for bulk charging my Lipos to 50v at 10 or 20 amps? I like the versatility of the above power supply so I don't really mind the extra cost. Might even get the 100v version in case I go to a 72v set up later.
Mainly looking for cheaper options or any reasons I might not want to use the above power supply as my bulk charger.
Travis

dnmun   100 GW

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Re: Opinions on 48v Lipo bulk charger

Post by dnmun » Nov 19 2013 2:35pm

you will need a BMS to balance and protect the pack if you are gonna use bulk charging. if you use a regular lifepo4 charger then when it gets to the CV stage it will balance the battery under the BMS.

midcitybikesbrla   100 µW

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Re: Opinions on 48v Lipo bulk charger

Post by midcitybikesbrla » Nov 19 2013 4:34pm

Wouldn't a Lifepo4 charger be the wrong voltage, can I use that at all?
Planning to parallel balance them periodically with a Lipo balance charger.

Hillhater   100 GW

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Re: Opinions on 48v Lipo bulk charger

Post by Hillhater » Nov 19 2013 5:41pm

Are there any less expensive options for bulk charging my Lipos to 50v at 10 or 20 amps?
Plenty. :idea:
It just depends how cheap you want to go, and how much reliability you are prepared to risk .
This is an alternative 20 A, "Lab" PSU, for $200.
http://www.ebay.com.au/itm/Laboratory-H ... 4178a13af2

And there are many Meanwell type clone PSUs for CNC and LED drives that would do the job.
600W, 36 -52v , 10 -15 A seems common at prices ranging down as low as $50 !
buy a pair, have spares or series them up for higher voltages ?
http://www.ebay.com.au/itm/Cnc-Controll ... 3f2b3c57dd.

But for the money you are prepared to spend, i am sure you could buy a 12 S balance charger ?
This forum owes its existence to Justin of ebikes.ca

dnmun   100 GW

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Re: Opinions on 48v Lipo bulk charger

Post by dnmun » Nov 19 2013 8:52pm

midcitybikesbrla wrote:Wouldn't a Lifepo4 charger be the wrong voltage, can I use that at all?
Planning to parallel balance them periodically with a Lipo balance charger.
you can adjust the charger output voltage to the 58.8V of the 14S of lipo. that way you have the balancing current to balance the lipo pack.

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wesnewell   100 GW

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Re: Opinions on 48v Lipo bulk charger

Post by wesnewell » Nov 20 2013 3:06am

There are lots of bulk chargers from $20 up.
http://www.bmsbattery.com/18-alloy-shell
Since you're looking at 50V I assume you're running 12s. Here's a decent 12s balance charger.
http://www.hobbypartz.com/75p-1220-char ... PAod10MAPw
Need a 350W minimum 12-15v PSU for it. Old computer PSU will work if you have one.
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