Thanks, this is the only place I could find out what the under-voltage cutoff voltage is! Amazing how difficult it is to find decent specs for stuff bought from China.
@USA-GreedyMenOfNoIntegrity3 жыл бұрын
Or manuals. Chargers BMS did a great job on their downloadable manual.
@JulianGoesPro Жыл бұрын
funny to find you here lol :D How you doing? ;)
@lreg432 жыл бұрын
Excellent--even I could understand it !
@johnbriggs75143 жыл бұрын
Thanks for walking through that. The balancing system seems of dubious value. It only works at the top end of voltage and if a little excess voltage is applied, the charging shuts off. This leaves a very narrow window for the balancing to occur.
@stevenc223 жыл бұрын
Agreed. That's why I use a RC charger with all my batteries to manually balance and monitor batteries
@johnbriggs75143 жыл бұрын
@@stevenc22 What balancer do you use?
@stevenc223 жыл бұрын
@@johnbriggs7514 I have 5 or 6 different balancers. Love the ones from ISDT, good perfomance and reasonable price. Icharger one is very nice, but expensive. Ill give you some links. But remember these chargers can only balance up to a 8s pack. If you build in 36V or 48V these chargers wont help you.
@stevenc223 жыл бұрын
amzn.to/3rWjJBN
@stevenc223 жыл бұрын
amzn.to/31P1uDN
@losaminos592 жыл бұрын
Are the Daly's doing an active or passive balancing? Are they really distributing the charges between the batteries or just dissipating them using resistors? Yeah, 50mA is just too low to catch up with the chargers.
@stevenc222 жыл бұрын
Passive at the top of the charge cycle
@janvanzyl5493 жыл бұрын
Table comparing balanced voltages would have been more effective than the speed up bit. Thanks for the video tho. There are hordes of other bms that could be tested with your process. Namely one marked "jwbms 6c30a ntc" as a Google search
@FruitTreeForest2 жыл бұрын
Great vid.
@docwilson53843 жыл бұрын
Stevenc22 thank you posting this video, Question stevenc22 if you have a 24 battery pack with that BMS in your video what's the cutoff point of the battery pack, like 24 battery pack charge to 29 volts and when you use it to power something it discharged to 24 volt right, like 12 volt battery pack charge up to 13.2 and discharge down to 11 volts, sorry for being confuse about this, the cut off voltage of a BMS, 12 VOLT AND 24 VOLT battery with BMS....Peace
@stevenc223 жыл бұрын
Each cell has a max of 4.2 and a min of 3.0. So a 7S battery tops out at 29.4v and min voltage is 21 volts. For a 12V Lithium ion pack, you would use either a 3S (12.6 max 9.0 Min) or a 4S (16.8 Max 12.0 Min)
@docwilson53843 жыл бұрын
@@stevenc22 Thank you Stevenc22 i understand now....Peace
@ramik85572 жыл бұрын
Hi, First of all want to say thank you for your videos, you inspired me to build my own battery and I did it. After I finish building my battery I have a problem with the bms it's not closing a surcuit and i can't charge my battery. Maybe you encounter a problem that the bms not working and not charging? Or you know a way to check a bms?
@stevenc222 жыл бұрын
Are your balance wires on correctly? Use a multimeter to check the balance wires. Make sure the order of the balance wires is correct as well. Some BMS you have to wake up by apply a charge current to the BMS.
@ramik85572 жыл бұрын
Thank you, will check it tomorrow..... By the way , I have a daly 13s 48 v 10/30 bms
@stevenc222 жыл бұрын
@@ramik8557 the Daly you don't have to wake up. I bet you have you balance wires out of order or one isn't properly connected
@KerimKero1903 Жыл бұрын
Are these good for like a battery pack for a e bike with max 10parallel.
@stevenc22 Жыл бұрын
Yes. I use Daly on my bike!
@fozzy10006 ай бұрын
What is the name of the dislay that shows the 7 cell voltges and where can I find one? Thanks
Why are some people in Australia seeing different results with big Battery banks
@stevenc22 Жыл бұрын
In what regards?
@zigamahne4636 Жыл бұрын
hi where did you put the cable from isdt t8 to?
@stevenc22 Жыл бұрын
Sorry what do you mean? The t8 has power coming in from a power supply, the. It has a power out going to the battery. It also has the balance wires going to the battery.
@armenvegas Жыл бұрын
Wow they don't balance till 4.18? Thank you
@PeterOrrick Жыл бұрын
Can I connect the battery directly to the hover board, bypassing the BMS?
@stevenc22 Жыл бұрын
Yes, but that is a bad idea. You could easily over discharge or over charge the battery without a BMS, damaging the battery
@PeterOrrick Жыл бұрын
@@stevenc22 Thank you for the reply. I have a fully charged battery but, when connected to BMS, it does not power on the hoverboard. When I directly connect the battery (~36 volts) to the hoverboard, the hoverboard powers on. Is your warning of over discharging/ overcharging the battery only possible if I try to charge it? If so, I'm fed up with troubleshooting this darn thing and plan to just ride out the charge in the battery, until it's depleted, then throw everything away. Is that safe? Or do I risk over discharge/overcharge then, too?
@stevenc22 Жыл бұрын
@@PeterOrrick you can ride it and drain the battery and throw it out. Trying to recharge it will be dangerous but not draining it down.
@msaurabh12 жыл бұрын
What’s that device that you connected for the visuals to see the voltage?
@stevenc222 жыл бұрын
ISDT amzn.to/3MTMppE
@msaurabh12 жыл бұрын
@@stevenc22 Thank you so much.
@Inosix2 жыл бұрын
Question for anyone capable of answering: I have a 750w, 12v Power Supply (62 amps). I also have a custom built Li-ion 3s8p pack. The Daly says it can charge at max at 10amps. If I was to connect my power supply (62 amps) to my battery (10 charging amps) what is limiting the current (if anything)? Would the Daly limit the charge current? Or would I simply blow up my battery?
@stevenc222 жыл бұрын
The battery will try to draw as much current as the batteries can absorb. Probably less that 60 amps but more than 10 amps. A good BMS will turn off the charger because of over current. A BMS cannot limit current it can only turn off the battery if it detects conditions outside it's parameters. That much current might blow the BMS. You should use a ISDT or icharger with the power supply so you can dial in exactly what rates you want to charge at.
@Inosix2 жыл бұрын
@@stevenc22 Thanks for the reply. I attempt this last night. I put a 5 amp fuse inline with the positive lead and gave it a try. With my dmm in series, after turing the power supply on, It was drawing at 4 amps. I had already been charging it using a 1.5 amp power supply, followed by a 4 amp power supply before I gave this a try. It was already partially charged by the time I tried it, so I am not sure what would have happened if the unit was at close to empty. Either way, thanks for the reply. I think I'll end up doing the charge as you describe because the power supply is supplying constant voltage, variable amps (the amps is a product of the voltage delta). I think it's better to have constant amps variable voltage. No?
@stevenc222 жыл бұрын
@@Inosix Lithium ion chargers start with constant amps in the beginning and switch to constant voltage at the end. A cheap ISDT will make all your charging needs so much easier. amzn.to/323QDJG
@Inosix2 жыл бұрын
@@stevenc22 Have you had experiences with this unit? I saw a handful of folks suggesting the balancing feature isn't accurate. The voltage sense is not calibrated.
@stevenc222 жыл бұрын
@@Inosix I have 3 ISDT units. Love them
@alfredrein6992 жыл бұрын
Why are they writing balance on it. The cells are almost not balanced, Really bad BMS
@stevenc222 жыл бұрын
It does balance. However it is a very slow balance at the top of the charge.