2012年9月19日星期三
5-25amp Golf Cart Battery Charger
I have a stock in 36 volt ez-go golf car battery chargers that I was considering rigging up to my 2, 36V LiPo4 batteries to. I've got the 36V 20AH Ping Batteries. Will this charger fry them? I have a few of them, (i work on a golf course) and seeing that the chargers Ping gives you with the batteries are cheapy cheap I thought these might work.... Im out of transportation right now because Ping has 2 replacement chargers on the way but that may take a week.
you can use up to 45V on the input to the charging ports on the ping 36V packs. measure the output of your chargers before you do this.
These golf cart chargers are meant to charge 6, 6 volt lead acids.... So Im very scared to think what they'd do to the 36 volt LiPo4. Not really too anxious to try it out until I hear from someone that it works!
The real issue is the amps. I believe pings bms is limited to close to 5 amps. That's what I was told was the max regen mine, 2.5 years old, could tolerate safely.
I'm not sure what the amp rate the bare cells can take is, but once you put two batteries on it at once, you'd be down to 12 amps per pack. That's plausible.
Make a hell of a good quick charger for a big lipo pack, that can do big c rates of charge no problem.
Or, if you have a trailer, that charger and a generator and you got a series hybrid EV.
THE LIPO RULES. NEVER ABOVE 4.3V NEVER BELOW 2.7V DON'T PUNCTURE
Ideal charging /discharging range for Lipo, 3.65v minimum 4.1v maximum
I just realized the post says 5-25 amps charger. I was just thinking in terms of 25 amps period. Set it to whatever amps you think your bms tolerates. Bear in mind, you don't have to do all of the charge through a bms, just the last part. With my 48v 5 amp charger, my ping bms charge fet does get pretty warm. But it's the model from almost 3 years ago now, an early V2.
Looking at ping specs, even the 10 ah size can charge at 5 amps. Clearly the cell is not the limiting factor but the bms, or the supplied charger. Since you have 40 ah of cells, I see no reason why charging all 40 ah at once at 20 amps should damage the cells. But do watch the bms fet heat if you run 10 amps through each bms. Solder liquifies, it would be time to stop eh?
On the other hand, if you are home, what's the real problem with slower charging with the 5 amp ping chargers? They go pretty fast at 5 amps. Seems like 36v 40 ah oughta be enough for one day's riding.
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