Yes, they are small packs. My EV is an eVelomobile you might say. (Don't sniff at this it works well, I commute 25 miles each way on it. I could buy two of them for what many pay for just the batteries in a car conversion. And I get the exercise I need too.) The motor is for an E-bike 1HP. Uses an RC controller.
I have two packs one at 10Ah 48V is probably Headways, the other is the 20Ah 48V pack I mention from Alibaba. FWIW they give this spec: Maximum Discharge Current 30 AH (BMS Set 1.5C 1500W ) Peak:60A (2000W) I think charging and discharging rates are usually the same. Is that a bad assumption? Inside the 10Ah pack is nicely constructed, the BMS looks well made. I did not like that the connector plates were torqued barely hand tight. I brought them up to spec (I forget exactly, maybe 35 in lb). Here is a link to an album with images for the unwrapped packs in case you are curious. Can anyone confirm the cells look like Headways cells? https://picasaweb.google.com/100767276460953028406/OTELF On Wed, Dec 18, 2013 at 5:09 PM, EVDL Administrator <[email protected]> wrote: > On 18 Dec 2013 at 16:29, Michael Ross wrote: > > > After buying this pack, I am not sure if Ping are really worth the > > rather large extra cost. > > I don't have anything to compare them to, but mine are now almost 2 years > old and still going strong. I would (will) buy from them again. My only > gripe is the cost for shipping, but I have to say they were packaged VERY > well. > > I built mine into custom aluminum boxes with little smoked-acrylic windows > to show off the blinky LEDs on the BMSes. > > The capacity was a bit low at first, 9.something ah for a 10ah rated > battery, but at last test last summer, it was around 10.5ah. That's to ~21 > volts for a 24 nominal volt battery, when my 24v inverter shuts down. > > I try to charge until the first LED comes on, not really needing maximum > capacity. I let them balance (all 8 LEDs) every 5 or 6 charges. Even at > that, from 1 LED to 6-7 on is usually less than a minute. Often there one > or two slight stragglers that continue to blink briefly for another few > minutes after that, then it's (presumably) balanced. > > These are obviously too small for road EVs, but are fairly widely used in > E- > bikes and scooters. > > David Roden - Akron, Ohio, USA > EVDL Administrator > > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > EVDL Information: http://www.evdl.org/help/ > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > Note: mail sent to "evpost" and "etpost" addresses will not > reach me. To send a private message, please obtain my > email address from the webpage http://www.evdl.org/help/ . > = = = = = = = = = = = = = = = = = = = = = = = = = = = = = > > > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > For EV drag racing discussion, please use NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Put this question to yourself: should I use everyone else to attain happiness, or should I help others gain happiness? *Dalai Lama * Tell me what it is you plan to do With your one wild and precious life? Mary Oliver, "The summer day." To invent, you need a good imagination and a pile of junk. Thomas A. Edison<http://www.brainyquote.com/quotes/quotes/t/thomasaed125362.html> A public-opinion poll is no substitute for thought. *Warren Buffet* Michael E. Ross (919) 550-2430 Land (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Google Phone (919) 631-1451 Cell (919) 513-0418 Desk [email protected] <[email protected]> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20131219/349acfaa/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
