Erfolg Posted August 3, 2007 Share Posted August 3, 2007 I charge my lipo batteries with the following set up:A) “ JP Ultra Power”, switching power supplyB) A “JP Li-Po 2000 Professional”C) “Overlander Poly Pro Lithium Polymer Battery Balancer Guard”I am charging a selection of 3S Lipos. According to the instructions either the Li_po 2000 should announce the completion of charging by a warning or the Balancer go to a solid red light.In some instances this does not happen with either piece of equipment. The Li-po guard may start flashing intermittently. However after 3 hrs. I will switch of.Does anyone know if there is a problem, or may be, just assume I have a fully charged battery, if the guard starts to flash. Rather than wait for the charger to say it is completed its task.RegardsErfolg Quote Link to comment Share on other sites More sharing options...
Allan Jordan Posted August 3, 2007 Share Posted August 3, 2007 Hi Erfolg, Would it not be best to contact Overlander for help here?You don't want more aggro. do you? Gie them a try and then let us all know what they have to say. Regards Allan J..TTFN Quote Link to comment Share on other sites More sharing options...
Erfolg Posted August 3, 2007 Author Share Posted August 3, 2007 I have used the JP Perkins charger without the lipo balancer. The unit immediatly registers charging complete.I guess the issue is with the overlander product. Their technical people will not be available until Monday.RegardsErfolg Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 3, 2007 Share Posted August 3, 2007 Have you tried actually measuring the final resting voltage of the pack using a digital multimeter? Any figure between 12.45 and 12.6V is considered full for a 3s LiPo pack. Quote Link to comment Share on other sites More sharing options...
Erfolg Posted August 4, 2007 Author Share Posted August 4, 2007 I have measured the two batteries I have had on charge, results as follows:a) 800mA, 12.53vb) 1500ma, 12.55vboth figures fall within the range quoted. So it appears they are charged.I guess the issues are,1) When to diconnect if the charger does not signal completion2) Is the balancer doings its job.I must thank you all for your help and advice. Often think that the exchange of information and ideas is what these sites are about for us users.Best regardsErfolg Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 4, 2007 Share Posted August 4, 2007 I cannot find the info on the charger you mention - are you SURE you have spelt /described it correctly?All the LiPo dedicated chargers I know of, have a monitoring capability and will normally stop the charging when the pack reaches its optimal voltage ( 2s = 8.4V and 3s = 12.6V )If your charger is terminating almost immediately, then perhaps it is not correctly determining the cell count, or are you manually setting that? liPos sdhould not be charged at more than 1C which should take around an hour+ assuming the pack is empty to begin with ( approx 3V per cell )The only way to be sure the balancer is doing its jonb ( if it is not clear )is to measure each cell individually via the balancer plug using a DVM. This is something I do regularly, even though MY balancer is easy to read. Quote Link to comment Share on other sites More sharing options...
Aslan Posted August 4, 2007 Share Posted August 4, 2007 Check if it is the same pack that causes the charger/balancer not to tell when the charge is complete.If so,you could try to balance it with the balancer alone(not connected to charger)then charge it up. Quote Link to comment Share on other sites More sharing options...
Aslan Posted August 4, 2007 Share Posted August 4, 2007 Found the charger Timbo at BMC.Looks like it does what it says on the tin. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted August 4, 2007 Share Posted August 4, 2007 Who the heck are BMC ?Ive heard of BRC...but not BMC.Is THIS the charger...cos if it is I have one as a spare in the car ! Thats the trouble with having so many chargers - I forget which ones I have !!Anyways...if this is the one, It works fine for me whenever I have used it, only down side is no meter readout, and current settings are a little inflexible. Always beeps as it should at the end, and whenever I check the packs the voltages are always spot on. One thing I have noticed is that it often gets the auto cell detection wrong - showing a 3s as a 2s. I just override it. Could this be your problem ? Quote Link to comment Share on other sites More sharing options...
Erfolg Posted August 4, 2007 Author Share Posted August 4, 2007 A little of what has happened has got lost or confused in the telling.The preceding picture shows the Lipo charger.I have charged both packs, the Lipo charger did not beep to indicate termination. It always has in the past. The balancer has somtimes gone to a solid red Diode (indicating completion)in the past, without the charger indicating completed charge. In this set of instances neither has indicted completion, although the balancer has indicated it is almost there (flashing red diode). Where a solid red indicates completionI then tried using it without the balancer. It was at this point that it almost immediatly registed a charged battery (12.53 & 12.55). The measured values are after the charger indicating completion.The problem seems to be connected to the Lipo balancer in the circuit.Sorry about the confusion.RegardsErfolg Quote Link to comment Share on other sites More sharing options...
Aslan Posted August 5, 2007 Share Posted August 5, 2007 How about hecking this:"Good one finding the charger that I was trying to find some info on,not sure who BMC are,do you have their site address and I'll have a look.":-)Anyway, yep,thats the charger.Adios amigos. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.