Speaks the guy who only managed 60 miles out of a chain... heck that wouldn't even be 1 hour of running at 60 mph on my trike... dude, you can't even build an eBike right with similar components of what I've gotten thousands of trouble free miles, who are you to give advice about how to build or recharge a battery pack?... and claim everything Cyclone sucks... wonder why are you still here? You give BAD advice to people trying to get started, period; Parallel charging is a BAD idea for a novice. Then there is the CellLog 8S, its a pretty darn nice LiPo logger with USB, so bashing it proves you don't have much experience; btw, what helicopter do you own? can you even do nose-in hover?
Your first statement renders all other ones moot. Get a BMS and put it on, hopefully you won't burn the house down while doing it... You should do the serial port I explained on my previous post, or you are so cheap you won't buy a couple of duo 6S chargers? Then bulk charging LiPos is a much preferred alternative over parallel charging. I did bulk charge my 2.2 kWh pack a few times back when I had the pack inside the trike, and used the serial cable to keep an eye on each of the cells while I bulk charged it. But in the end turned out that balance charge every time was the better alternative.
What are you talking about man, Do you even know what CC/CV means? I can't remember for how long I've recharged LiPo packs to 4.2V (heck back in the day I used to overcharge them to 4.3V to get more runtime) maybe since 2003 and even earlier; back in these days the recommend low voltage was 2.6 volts per cell or something like that IIRC, using those fire-hazard LiPos 1st generation.
Never had issues with parallel charging until I started using them on EVs for days at a time; so I guess that's is worth something. BTW, how long do your batteries remain inside your eBike? a single ride? do you recharge them every ride? do you have to plug them in before you ride? yeah... I thought so... that is the reason why its appears similar to helicopters based on your very limited experience. So, if you don't know, then don't speculate, it doesn't make you look good.
When your packs are half way down, say 3.85V, and you run them at 30F outside for any period of time they will start go out of balance more and more UNDER LOAD, not at rest, and a 18S pack can sag almost 10volts in cold weather, if not more when fully charged; between the months of November and March around here; 10 volts is about 0.5 V/cell, when fully charged... and it only gets worse when the pack drains; but what do you know, right? have you ever logged a cell discharge curve on your eBike at 30F? probably not, so again, don't speculate or think others don't know. The pack might be fine at rest, but not UNDER LOAD in cold weather... my LVC alarm is set to 65.0 V, I get an ear piercing beep that indicates I shouldn't push the trike any further, that comes about to ~3.6 volts per cell, more or less the point when voltage starts to scatter; but then again without a BMS or a cell voltage display I have no way of knowing if one of my cells is already running under the 3.0V under load or not, hence why I am going with a BMS. You can keep paralleling your packs, I don't care, but that is BAD ADVICE for people who are new to eBikes and LiPos, period. I would take bulk charging LiPos ANY DAY over parallel charging.
One of your most recent post was to state you fried the halls of the motor, asking to run sensorless; so, basically you abused the motor and ruined the halls (I wouldn't be proud of that) and I certainly wouldn't listen to any of your advice b/c you seem to enjoy abusing the components and then stating it sucks... whether its on purpose, or ignorance, it doesn't matter; heck, I would bet you asked Cyclone to honor the warranty too... right?
When, and if you ever manage to have 14000 miles (and counting) under your belt with several months of sub zero F degrees in the mix, in rain, snow, ice, rain, etc, distributed over 3 high performance EVs, two of them failure free for almost 8000 miles, then we can have a conversation based on facts, in the meantime, everything you say that goes against the facts is just pure speculation and hearsay. I have the data and the miles to prove and show new Cyclone owners a surefire way to get a reliable eBike that will commute for thousands of miles without any issue, you don't; as proven by your track record here of claiming everything sucks, frying motor halls, and the 60 miles a chain joke, when I've managed to get 5000 miles out of a 10 speed one, I think sometimes you're just a troll.
G.
flat tire said:
gman1971 said:
With good "battery management", hence why use a BMS...
I wouldn't be opposed to a BMS if someone had a 20S bms that is reliable and doesn't cost a fortune. Sure, my icharger may not be automotive qualified but it uses high quality components and is a proven design.
gman1971 said:
I thought the same way you did, until packs ruined, a 300 dollar mistake
No, you didn't. You parallel charged to 4.2 / cell and discharged who knows how far. 4.2 is a total recipe for disaster because you will force some cells over max voltage without balancing. Also, I check my balance every few rides. The voltages are extremely stable and and when some cells start to give up I'll retire the pack.
gman1971 said:
Helicopter flying has little to do with using LiPo batteries for EV usage
Actually, it's pretty similar except harder on the batteries. With the heli I discharge farther, C rates are higher, pack voltages are much more mixed when paralleling, and sometimes I store them for a while with no action. Even so, I've had nothing but great results.
gman1971 said:
at some point you have plugged the packs in series while the parallel adapter was hooked up, or something similar along these lines
This isn't even possible with my helicopter since with my parallel board there's no way to combine the batteries in any way but in parallel. On my ebike it's not possible either since I have only ONE parallel harness, ONE series harness, and the output plugs on them are not even compatible so I can't plug my series output into the charger. You COULD screw up if you tried to parallel the balance leads while the packs are in series, but I check balance on each pack individually, and connect the balance charge in parallel only AFTER hooking the cells up to the charger in parallel. In reality I almost never need to balance. Sure, I have had accidents and incidents with electricity but none involved parallel charging yet.