Jehu, one thin I do about every month or so is I take the BattGo and test every board in my 36p to see if any trace fuses are bad. disconnect the ribbon cable from all and plug the BAT in, if one or more cell reads 0v then I know I have a bad trace fuse. Monthly maintenance.
@@jehugarcia Yes twice, but after I took out the pack and re-tested every cell and found the one or two bad cells then ran re-packer all has been good. But if we don't use new cells all the time this is a quick way to check everything.
@TheCheesePlease sorry you feel that way. Man, you just can't get away from Fanboys. Gues the proof is in the pudding when I start buying more cells and buying Jehu boards.
7.22.20 Jehu, are you going to make a video on how to wire up the battgo BG 8s? I bought 4 of the BMS and now I am hoping they are fine. Slowly taken apart the scooter battery packs and testing the cells and putting them into the PCB. Currently have 5 PCB (35 cells) populated and now ready to test the BMS.
I had all my wire trace fuses blow out, if you have issues check them first. in the next iteration of the bord I would like to see the trace fuses replaced with SMD
Generally, trying to measure resistance while voltage is applied to circuit is going to give unreliable results. The resistance measurement works by applying a small voltage and measuring the small current. Voltage in the circuit confuses the measurement.
jehugarcia : A shunt is a precisely manufactured wire block with very low predetermined fixed resistance at manufacturing stage. It is used to measure current not resistance. When current flows through it, a voltage drop occurs across its terminals, and this voltage is directly proportional to the current flowing through the shunt because of V=IR (Ohms law), whereby R is constant in a shunt, hence voltage varies with current. There is always a small electronic circuit attached to the shunt to compute (calculate) the amount of current flowing through the shunt. Thus current measurement is also computed into Amp-hours, if necessary. A combination of shunt and display circuitry are used to measure Amp-hours, and thus are used as battery monitors. A good example of use of Shunt and monitoring circuit is the VictronEnergy Shunt and BMV’s www.victronenergy.com/battery-monitors
@TheCheesePlease He is a famous person being followed by many people and it's very much possible he would not be getting time from so many comments to reply or revert on, but he does and did reply, with his best knowledge, knowledge is something to share we all don't possess every bit of knowledge on earth, Lolz 😂🤣😂💐👌🌹
I found a problem with my v1.3 populated board. The ribbon connector is off one set of points. I found the issue when I tried to check the voltages on the testing points on the ribbon conector, the first set of pins shows 8v, no combination shows 4v, so I flipped it over and compared to v1.0 of the board and saw the connector is shifted over one spot. I wish I could share a photo of what I have to help others.
Hello i will wish help please I am a beginner in electronics and I would like to manufacture a 3S3P battery and with the BMS card I can not understand where to solder the 4.2v and 8.4v on the battery ... I know this is a difficult question to explain here could you do an explanatory video? thank you so much
It’s open source so they are selling my design, I’ve ordered from most of those guys to check it out and I was thinking of just using them to populate for me, but they all suck, they send you mistakes, they don’t know how to package so everything arrives broken, and they take for ever to deliver.
Really want to start buying the system you offer and will continue to follow as you walk through the steps to create a powerwall (I hope that will be your goal). One question in the back of my mind: you offer two cell boards I think one if seven cells and the other is 14 cells what is the difference and their applications?
Hi. I have your PowerTalk kit. When I connect all to the bms. There is to much heat that the fuse melts off. I tried half and it still seems to get 220 degrees. Any thoughts?
In Electronics, it is not ok or recommended to do a continuity multimeter test in a live(powered) circuit, let alone across a MOSFET or transistor. Continuity test should never be done on a powered circuit.
Hi Jehu great video on BMS lovely content, I am interested in making my own BMS would love to send it to you for testing, the cell holders seen in the blue cell packs are great
Where can I find a Pin-out to build the cable for the BG-8S Meter to the ribbon cable?
Thanks for the video, helpful. What’s the best way to replace the hairline traces when they blow?
Jehu, one thin I do about every month or so is I take the BattGo and test every board in my 36p to see if any trace fuses are bad. disconnect the ribbon cable from all and plug the BAT in, if one or more cell reads 0v then I know I have a bad trace fuse. Monthly maintenance.
Has it happened ?
@@jehugarcia Yes twice, but after I took out the pack and re-tested every cell and found the one or two bad cells then ran re-packer all has been good. But if we don't use new cells all the time this is a quick way to check everything.
@@jehugarcia Also, I have had one balance wire break off from the BMS board that was hard to see at first and gave me wired numbers too...
Looking forward for the powerwall project using the PCB modules, I bought 10 modules plus the BMS and I willing to buy the 75ps to build a powerwall
Same, bought 10x too but not open box, to many other projects... lol
Have 4x 36v packs, 2 8s module, and over 100 modems to harvest. Have a buck and boost converter, going to get voltage down to 24v
Please provide schematic so we can troubleshoot the complete system.
Watch the original video, it has all the info you need
@TheCheesePlease sorry you feel that way. Man, you just can't get away from Fanboys. Gues the proof is in the pudding when I start buying more cells and buying Jehu boards.
7.22.20 Jehu, are you going to make a video on how to wire up the battgo BG 8s? I bought 4 of the BMS and now I am hoping they are fine. Slowly taken apart the scooter battery packs and testing the cells and putting them into the PCB. Currently have 5 PCB (35 cells) populated and now ready to test the BMS.
No, it’s as simple as connecting pin 1 on the meter to pin 1 on ribbon, pin 2 to pin 2 and so on
I had all my wire trace fuses blow out, if you have issues check them first. in the next iteration of the bord I would like to see the trace fuses replaced with SMD
Generally, trying to measure resistance while voltage is applied to circuit is going to give unreliable results.
The resistance measurement works by applying a small voltage and measuring the small current. Voltage in the circuit confuses the measurement.
Ross is right. You should never measure resistance or continuity check on a live circuit.
how do shunts measure resistance? With the circuit off ?
jehugarcia : A shunt is a precisely manufactured wire block with very low predetermined fixed resistance at manufacturing stage. It is used to measure current not resistance. When current flows through it, a voltage drop occurs across its terminals, and this voltage is directly proportional to the current flowing through the shunt because of V=IR (Ohms law), whereby R is constant in a shunt, hence voltage varies with current. There is always a small electronic circuit attached to the shunt to compute (calculate) the amount of current flowing through the shunt. Thus current measurement is also computed into Amp-hours, if necessary. A combination of shunt and display circuitry are used to measure Amp-hours, and thus are used as battery monitors. A good example of use of Shunt and monitoring circuit is the VictronEnergy Shunt and BMV’s www.victronenergy.com/battery-monitors
@@jessew6757 Beautifully explained 👍👍
@TheCheesePlease He is a famous person being followed by many people and it's very much possible he would not be getting time from so many comments to reply or revert on, but he does and did reply, with his best knowledge, knowledge is something to share we all don't possess every bit of knowledge on earth, Lolz 😂🤣😂💐👌🌹
I found a problem with my v1.3 populated board. The ribbon connector is off one set of points.
I found the issue when I tried to check the voltages on the testing points on the ribbon conector, the first set of pins shows 8v, no combination shows 4v, so I flipped it over and compared to v1.0 of the board and saw the connector is shifted over one spot. I wish I could share a photo of what I have to help others.
7.22.20 John I also wish you could share the photo. Could you please send your photos to chuck348@gmail.com? Thanks
How did you fix those?
@@northernflyer5311 I did not fix it. I would need to desolder the 16pin connector and move it over one. Not fixing it right now. Maybe later.
Hello
i will wish help please
I am a beginner in electronics and I would like to manufacture
a 3S3P battery and with the BMS card I can not understand where to solder the 4.2v and 8.4v on the battery ... I know this is a difficult question to explain here could you do an explanatory video?
thank you so much
Where i can buy Holder 7s With BMS? With option to expand to 7s2p 7s3p itp...?
Great video! I have your kit but haven’t built it yet.
I know you are busy, but this sort of quick basic troubleshooting content is awesome.
5:00 How much current can handle those trace fuses and how to improve the board to repair them or remove them?
Nvm, I just it with my soldering iron. I'm searching now for a gerber editor to remove that problem.
great debugging !
Bro, no love for Canada? I need your electronics up here! :)
It took me a while to find your how-to videos. They are great; you do a great job of explaining everything. Thanks, Joe
Just saw a Chinese site selling all this stuff... Did they copy or are you selling thru them?
It’s open source so they are selling my design, I’ve ordered from most of those guys to check it out and I was thinking of just using them to populate for me, but they all suck, they send you mistakes, they don’t know how to package so everything arrives broken, and they take for ever to deliver.
I have had nothing but bad luck with the copy that come from Chine.
alternative to SOC board use a RC voltage alarm instead for cheaper alternative
I got one of your boards and the posative blue ribbon was not on the negative side.
Whats up?
Will you offer shipping these Kits to Europe any time soon?
Really want to start buying the system you offer and will continue to follow as you walk through the steps to create a powerwall (I hope that will be your goal). One question in the back of my mind: you offer two cell boards I think one if seven cells and the other is 14 cells what is the difference and their applications?
One is rated at 1c continuous and the HP is rated at 2c power output
I’m seeing these for sale on Geek and Wish. No copyright laws in China. Hate it for anyone that has a great idea and it gets stolen.
I believe they are open source. The Chinese boards are credited to Jehu.
Can u use for e bike battery
Hi. I have your PowerTalk kit. When I connect all to the bms. There is to much heat that the fuse melts off. I tried half and it still seems to get 220 degrees. Any thoughts?
In Electronics, it is not ok or recommended to do a continuity multimeter test in a live(powered) circuit, let alone across a MOSFET or transistor. Continuity test should never be done on a powered circuit.
Hi Jehu great video on BMS lovely content, I am interested in making my own BMS would love to send it to you for testing, the cell holders seen in the blue cell packs are great
Hi from Croatia, great content!
BG-8S Meter link not working
Works for me
👍
Hii bro
I want make my electric bike for future work so which battery pack I used into my project
This one jag35.com/collections/lithium-batteries/products/40-cell-lgmh1-18650-lithium-scooter-battery-pack
Los mejores bms para las baterías de Nissan leaf ??
Gracias
jehu when are the 4 cell modem packs going to be in stock
when are 48v battery packs going to be on sale?
What 48v packs?
@@jehugarcia I think he meant, in one of your videos you show putting to packs in series to make a 48v pack.
@@jehugarcia IN A VIDEO a week ago you said you had 48v ebike packs you were testing to go on sale.
@@jehugarcia th-cam.com/video/EVbLSof6vsM/w-d-xo.html these ones
@@jehugarcia bought one from batteryhookup.com couldn't wait any longer!
Elektrik li bisikletime okey olurmu
jehu when are the 4 cell modem packs going to be in stock on jag35
They are in stock now jag35.com/collections/lithium-batteries/products/modem-18650-four-cell-battery-pack
@@jehugarciaok
Vu meter