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Sounds like Bork

God bless Bud's soul. Goodbye good Friend. You have changed my life in so many ways and in just a couple of meetings. Will never forget! Thank you for all. Juan

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Guy just sprayed his knowledge all over me

Any chance you have a drawn schematic of any kind of your circuit? It seems simple, but the values are probably important, and the diode/resistor portion for the duty cycle isn't something I'm familiar with.

Thank you for great educational video. I have a battery where the charging port wires got shorted and I noticed that battery is not charging adnd voltage is not as it should be when full. Battery is Lithium ion 13SP6 48V 4.2V/cell (54.6V when full). I measured voltages between cells and I got all cell channels on 4.2V except 2 channels. 5th channel is 3.17V and 8th channel is 2.76V. I was wondering is it possible to disconect bms balancing plug and plug 1S charger to channels 5 and 8 separately to charge thoose batterys to 4.2V or should I dissasemble the whole battery pack? Also when Im measuring output voltage at the discharge port C- I get 47.7V (both charging and discharging wires are soldered to C-, P- is left free and I dont know why) and voltage at the B- 52V. Measuring voltage between B- and C- = 4.38V. Do you have any advice as what to do next? Thank you.

Thanks for this. Easily the best video I've seen on the subject. Has answered a few questions I had after pulling my battery apart yesterday.

Why are you whispering, I would think you would want us to hear you. That was the purpose of this video right? Speak up!

Great vid! Best explanation of all that is BMS I have ever seen. You really know your stuff. Keep up the great work :)

Awesome mod, wondering if you’ve considered adding a CV input at all instead of the potentiometer? I’m guessing the rest of those IC pins controls the rest of the sounds, I’m now sizing up top panel real estate!

Hello! after 1.5 years of usage, my lifepo4 battery stopped charging (light on charger is off), and also DC voltage between + - terminals shows 0. On the other hand when I opened up the battery case and checked the NEGATIVE wires like in your video (on 7:35) - it shows 13.95V - which is a perfect condition voltage (if came from + -terminals).... what does it mean?

How is this holding on? Still using it?

Great vid. I learned a bit more from it. The whispery voice was annoying to me but w/e. lol. thanks.

Is this the newest display for this year 2021-22 or is it the Bafang DCP 18 display.

*Hello! TSU me display writes error 7b and turns itself off. What should I do, how can I fix it?*

Thank you so much for making this video, but did you record it on a 2000's era dollar store phone with a mexico filter applied?

my bms allow some element to reach 3.7V while the others are still at 3.3 , is it faulty?

Uau !! Que modificação incrível. Eu queria colocar um display com backlight na minha TR626. Você acha que um dsiplay de 128x64 fucionaria bem ?

super sick dude. Im planning on getting one of these soon & modding the hell out of it 🙂 btw, do you know if an adjustable clock replacement is possible with the 626? i know the on 505 you can replace the global crystal clock w/ an LTC1799, but i can’t find anything about ppl doing the same with the 626

i have a battery pack that got wet and i had to replace 5 of the cell in one of the series. when checking across the balance connector i get 4.19 - 4.20. i have even removed the connector and checked voltages, in which i get the same. i have checked from the battery negative to the negative terminal on the balance port. i get 4.19 i have continuity across the negative terminals (0v) the issue comes when i put a positive and negative connection in the connection that goes to the controller. i get either 0 voltage, or the voltage goes to 18v and then disappears. i have no idea if it is the bms that is still faulty?...

How do you turn on the headlight

is there any way to reset the odometer not just the trip? good video thanks for share

A lot of chinese bms are faulty

nice! how does it do with co2 powered air guns? I'm wondering if the mist will interfere with the sensors.

Here it is 7 years later and the FAA instituted an arbitrary 250 grams limit for their absurd licensing requirements ( and soon broadcasting serial numbers and tracking requirements - not kidding ) etc . . and so - my question is - when you built this - did you weigh it - and how much did it weigh ?

Nice set up!

hello, what is the maximum in fps that marks ??

Best troubleshooting video I’ve seen! Answered every question I had. Thank you for your concise and clear style, Charles.

Charles thank you for getting back to me so quickly. I think I can replace the 5 batteries. They were in the last row, easy to get to. I'm going to get a new bms also. Will a new one plug right in? My bms as no temp. sensor all the new ones do. I'm getting a small spot welder too, are they any good? Thanks again, Rick

I have a question. I checked voltage in each battery cell on a 36v 500w e-bike battery, they were 4.3v in each cell, accepted 5 cells. Cells say they are 3.6v, 2500 mAh, 9.0Watts. 5 batteries read 1.2 volts when still in the pack. I figured they were bad, so I removed them. Then I checked them again out of the pack and got crazy numbers. Here are the numbers, Why? 5.6v, 1.9v 5.6v 1.3v 13.1v HELP PLEASE!

You have this coil running at 110%!! Great Job

Thank thee :-) However I do have a question. I have the voltages for a LiFePO4 cell listed as: minimal 2.500 volts nominal 3.200 volts maximum 3.650 volts Should not a fully charged battery have cells at somewhere near the maximum ?

Well...that is awesome.

Hi can I have the bms part number or link for that same bms I have the same battery and I can find a bms that conect to the exact connections I will really appreciate

I'm having problems with my 48v 30Ah battery. It is shutting off at around 50v on my bike, cant ride even at 300W. I have a post on Endless Sphere if anyone is interested to help me out. endless-sphere.com/forums/viewtopic.php?f=2&t=108215

Anybody got a link to these connectors?

Thank you so much for this information. I had two issues with my battery pack and I would like to share them with others. The first one was the power get disconnected especially after increasing motor speed, and it was due to defected battery groups. It seems the BMS disconnects the power to protected cells. I found the defect ones after connecting a resistor as a load (with 1A discharge current) on each group and monitor voltage decrease, then replace the one which is either short or has a low voltage. The second issue was the BMS is not charging. After checking with a multimeter I found an open SMD resister (value is 471) and replaced it. The BMS was able to charge again. Thanks again.

Hi Charles, your explanation is very good. I have a problem with my PCM, I suspect it needs a replacement. The 10s 4p battery will not charge or discharge. When the button is pressed to switch the battery on the LED's showing state of charge light up for 3 seconds, the voltage at the pack output terminals goes from 20.4 to 40.3 and then voltage goes back to 20.4.... voltage at terminals B- and B- (output) is zero and voltage between B- and C- is 40.3 and voltage between B- (output) and C- is 20.4. what would you recommend?

Hey Were Could I Purchase That Cable??

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Thanks for the troubleshooting guide on e-bike batteries. I was in a real jam when after finishing a ride and suddenly my battery wouldn't take a charge for the next ride. After scouring a dozen videos on youTube I found yours. followed your troubleshooting guide step by step until discovering it was the BMS. I have a new one installed now and my 52v 17.5AH is sailing along like new.

Am running my one on another bafang hub wheel an speed only goes upto 5miles per hr any idea why changed wheel size stayed the same

awesome tutorial, i was looking for why my BMS lights wont go on. I understand now. some times on or the other light up but very rare to see them lighting up.

hi sj4000 4K wifi air model does not have tv output feature? I want to use this camera as fpv. Is this possible ?

Thnak you!!!

I just watched you’re video. I just build a battery pack with a brand new bms but did wrong balance wiring, I try to do it right but now my bms show 7volt between C- and B- and 0,25 between P- and B- and ofcourse it wouldn’t charge. I’m wondering if I burned bms when I put to balance wires on the same battery?

is there a way to calculate exact frame size for 380mm diameter bed and at least 200mm z height?

Mr. charles I got the dc voltage reading between those 3 negative terminals in BMS when my battery power switch is turn off but if I turn on the power switch I don’t have dc voltage reading what does it means? my battery is li-ion 48v 14.5ah LG cells battery 2yrs of usage but not in everyday use. and my problem is the battery is not charging because the battery charger led indicators is not lighting up but I tested the battery charger thru multimeter and it’s working properly supplied the right amount of voltage for the battery

Help me! How to remove speed limit on bik himo c20? Thank you very much!

I seen these lights as well. No clue. Maybe balloons with lights attached?