combatwombat Posted August 9, 2015 Author Report Posted August 9, 2015 My chip started to act strangely by jumping from 92% to 65% and has been doing this behavior for the last few days. I just uploaded new firmware and software, and plugged in data for wh according to my battery spec. The balance is fine on batteries. Room temp and board temp seem way off too. Mabey I should try a hard reboot?
blueridgedog Posted August 9, 2015 Report Posted August 9, 2015 Have you configured your battery on the mod tab to let it now the watt hours you are using?A hard reboot is not a bad idea to get more information. I would do it when the mod is cold and unused to see if the chip temp is correct.
combatwombat Posted August 9, 2015 Author Report Posted August 9, 2015 I did the calculator Wh, still didnt help, just jumped from 70% to 26%. I also noticed i have the screen charging settings set different and they dont come up...
Gm111 Posted August 9, 2015 Report Posted August 9, 2015 combatwombat said:I did the calculator Wh, still didnt help, just jumped from 70% to 26%. Have you changed the battery curve?
combatwombat Posted August 9, 2015 Author Report Posted August 9, 2015 How do i do the curve? I figured out the charging screen settings was at 0%. The temp readings were perfect for room and mod and the battery % before when i first got it, must be a firmware change otherwise no idea.
James Posted August 10, 2015 Report Posted August 10, 2015 combatwombat: Ideally, using the battery analyzer with a sufficiently sized resistor block for an atomizer. If your battery is a standard 3S LiPo, the curve won't change substantially. That'll just tell you what the actual battery life is.If it jumps around substantially, chances are your battery has very different voltage from the stock settings (less likely) or the wrong capacity set (more likely.Also, once you change the watt-hours setting, it's good to let the battery fully charge so that it has the correct starting point. What battery are you using and what watt-hours do you have, out of curiosity?
combatwombat Posted August 10, 2015 Author Report Posted August 10, 2015 1050mah 3s 9.9v lifepo4, set at 10.4 Wh via calculator, it was set to the default 8Wh before and was working but recently this battery jump has been happening so i used the Wh calculator. Since i got it, about 3 weeks ago it was fine till 2 days ago. KTMrider all cells are evenly balanced in the device monitor.
John Posted August 10, 2015 Report Posted August 10, 2015 combatwombat, is there any change you have a big power resistor around somewhere? Or feel like winding a gigantic (half inch diameter, maybe a foot of wire, 20 gauge) kanthal air coil? I'd be VERY interested to have you run battery analyzer and see what the actual response and capacity of your battery is. It may or may not match the default ones we've tested at all.
combatwombat Posted August 10, 2015 Author Report Posted August 10, 2015 I will try to get some kanthal but if the resistor is cheaper where do i buy it? I seem to have fixed the problem for now by letting it sit over 100% on the charger for a hour after changing the Wh calculator a few times. I am not sure if it will stay that way but I am also interested in seeing the curve for this type of battery as might help others that are thinking of Lifepo4 batteries.
John Posted August 10, 2015 Report Posted August 10, 2015 Something like this would do the trickhttp://www.amazon.com/Chassis-Mounted-Aluminum-Wirewound-Resistor/dp/B008IE2IWI/ref=sr_1_1?ie=UTF8&qid=1439235466&sr=8-1&keywords=1+ohm+power+resistor
combatwombat Posted August 10, 2015 Author Report Posted August 10, 2015 That's the one I was looking at but wasn't sure if 100w would cut it if it's dumping at 200w. I hook up kanthal to that via atomizer?
blueridgedog Posted August 10, 2015 Report Posted August 10, 2015 combatwombat said:That's the one I was looking at but wasn't sure if 100w would cut it if it's dumping at 200w. I hook up kanthal to that via atomizer? Shielded wire would be the easy route. I think the kanthal suggestion was in the event that you wanted to make your own resistor.
Gm111 Posted August 10, 2015 Report Posted August 10, 2015 John said:combatwombat, is there any change you have a big power resistor around somewhere? Or feel like winding a gigantic (half inch diameter, maybe a foot of wire, 20 gauge) kanthal air coil? I'd be VERY interested to have you run battery analyzer and see what the actual response and capacity of your battery is. It may or may not match the default ones we've tested at all. For some reason I was under the impression that you had to use a resistor but I take it this is just the way you done it John, I've got some 18 gauge kanthal laying around somewhere, what would be the best way to go about doing the battery analyser on an atomiser? would dual coils do or would quad be better? Also what would be the best coil resistance and wattage to use? Or would I have to make my own resistor as blueridgedog says above?
VapingBad Posted August 10, 2015 Report Posted August 10, 2015 It's the heat build up that is the problem with air cooled coils Gm111 as the analyser runs for a long time so think big, much bigger than anything you would vape with.
combatwombat Posted August 10, 2015 Author Report Posted August 10, 2015 I wonder if the insulators in the atty would melt doing this? I have 24 kanthal which i could try around 1 ohm and 40w discharge, but that would only be 3 wraps on 1/2inch lol. I wonder if the ohm we test at has anything to do with accuracy of discharge? The one john linked is 1 ohm 100w.
blueridgedog Posted August 10, 2015 Report Posted August 10, 2015 VapingBad said:It's the heat build up that is the problem with air cooled coils Gm111 as the analyser runs for a long time so think big, much bigger than anything you would vape with.Thinking ten to fifteen wraps of the thickest stuff on hand around a broom handle sort of thing...
Gm111 Posted August 10, 2015 Report Posted August 10, 2015 ahhhh this stuff is too springy, ended up doing 15 wraps around a 30ml bottle for it to just go to the other side of the room when I let go
combatwombat Posted August 10, 2015 Author Report Posted August 10, 2015 24g is springy too even after pre-torch.
Gm111 Posted August 10, 2015 Report Posted August 10, 2015 I give up haha, my battery reads fine so it's no problem just wanted it to be more accurate. Maybe I will get the drill out tomorrow and give it a stretch to see if I can get rid of the springiness.
combatwombat Posted August 11, 2015 Author Report Posted August 11, 2015 Well I ordered one of those resistors, whats best way to hook it up? I was thinking soldering 14g to the resistor then putting them into my atty.
combatwombat Posted August 15, 2015 Author Report Posted August 15, 2015 I want to make sure how to use resistor that you linked me john. Thanks
Brandon Posted August 25, 2015 Report Posted August 25, 2015 Here is a .25 ohm setup we use (four 1 ohm power resistors in parallel), if that is helpful.
scoopy Posted August 25, 2015 Report Posted August 25, 2015 @Brandon....So I need 4 of the power resistors John linked? What wattage do I need to run the test in? Can u tell me exactly what I need to do after I build this setup uve shown.....and why are u running 4.....I thought John just meant one of them? Is there any benefit to running 4 in parallel? I am wanting to place my order so I can do the test just waiting on final instructions from John or Brandon....Thank you very much
Brandon Posted August 26, 2015 Report Posted August 26, 2015 Scoopy, you don't need 4 resistors. One will suffice for running the battery analyzer. We are using 4 as we do a lot of testing 200 watts.
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