DGJBD Bluetooth BMS - a short review

thedodgersonline · Jul 18, 2020

grey nomad said:
Hi Thedodgeronlin
Your the closest poster to where i live that i have found on this forum
I live in Agnes water and most of my family live around Noosa heads.

Hi grey nomad

Yes, just a bit south of you. Wamuran but I do envy you. Love it up there. 1770 and snorkeling. Ex work colleague (Stuart McAlpine) lives there in Agnes Waters as well.

If I can be of any assistance drop me a line

Regards

Pierre · Jul 18, 2020

thedodgersonline said:
Hi Pierre
Not yet no as I am busy on rebuilding my camper. Built 3 more slim batteries as well and busy cycling and load testing them so my battery is on the back burner at the minute.

Regards

Hi Dodger
Trust you are well and nice to hear from you. Keep us posted. I am playing around with a Raspberry Pi 4B . Oh dear , lots of programming to master. Want to use it to gather performance data on the packs etc.

grey nomad · Jul 18, 2020

Hi Thedodgeronlin
Yes Agnes water is still a peaceful beach side township
It's grown a bit since i used to come here for school holidays.
Been retired here for a few years.

thedodgersonline said:
If I can be of any assistance drop me a line

Will do
Can you private message on this forum

JoeHam · Jul 18, 2020

grey nomad said:
Can you private message on this forum

Yes. Just use the little envelope icon in the upper right corner.

idontknowwhatimdoing · Aug 6, 2020

Hey All,
I just built my 4s 280Ah pack from xuba and am using this BMS. I thought I ordered the computer connection, but it didn't arrive.
I'm connecting to the battery via the Android app perfectly.
I havent tried any load or charging the batteries yet. Because I dont want to break anything.

I noticed one of the cells is not accurate. My multimeter is showing slightly different.

Also, when I unplug the Balance leads to ”turn off” the battery. The voltage drops to 12.83V. I thought it would power off? Completely. When bluetooth is back plugged in the multimeter shows normal voltage.

Thanks for your help

idontknowwhatimdoing · Aug 6, 2020

Update!
So I connected a load to the battery and it switched it off when I removed balance leads. Still reads 12.83V. I dont understand how it does that. I'm assuming it allows a teeny bit of current through showing a residual voltage (because its not accurate voltage)

Apart from putting the cell capacity and cycle capacity (I did 280 and 210 respectively). I havent really done much else.

Am I right to just charge it and use it now?

thedodgersonline · Aug 6, 2020

idontknowwhatimdoing said:
Update!
So I connected a load to the battery and it switched it off when I removed balance leads. Still reads 12.83V. I dont understand how it does that. I'm assuming it allows a teeny bit of current through showing a residual voltage (because its not accurate voltage)

Apart from putting the cell capacity and cycle capacity (I did 280 and 210 respectively). I havent really done much else.

Am I right to just charge it and use it now?

Hi
Generally if I notice a difference in cells I join all in parallel and let them balance. Once they are balanced I connect them in series and connect the BMS etc then cycle them ( charge fully then discharge fully) a few times to get true capacity.
When you “turn off” the battery do you use the little buttons at the bottom left of the screen? I find when I switch the load off that way the voltage is still there but decays very quickly.
Generally not a good idea to remove balance leads with the BMS connected I believe.
Hope this helps.

Pierre · Aug 7, 2020

idontknowwhatimdoing said:
Hey All,
I just built my 4s 280Ah pack from xuba and am using this BMS. I thought I ordered the computer connection, but it didn't arrive.
I'm connecting to the battery via the Android app perfectly.
I havent tried any load or charging the batteries yet. Because I dont want to break anything.

I noticed one of the cells is not accurate. My multimeter is showing slightly different.

View attachment 19263

Also, when I unplug the Balance leads to ”turn off” the battery. The voltage drops to 12.83V. I thought it would power off? Completely. When bluetooth is back plugged in the multimeter shows normal voltage.

Thanks for your help

Not to worry - cells delta is only 11mV. Do as Dodger says and do a few charge / discharge cycles first.

thedodgersonline · Aug 12, 2020

pierre said:
Hi Dodger
Trust you are well and nice to hear from you. Keep us posted. I am playing around with a Raspberry Pi 4B . Oh dear , lots of programming to master. Want to use it to gather performance data on the packs etc.

Hi Pierre

you might be interested in this capacity load battery tester thingy (on my 3rd one now) anyway has Bluetooth and a port you can connect to a computer to gather data while the battery is under test. Great thing is that the low level volt cut off work too. Still max 185w but that is adequate.
If you look on the Ali list I g there is a path to where you can download the programme to your computer to link to the tester.

link
AU $41.47 26％ Off | DL24/P Color 2.4" DC USB tester electronic load lithium battery capacity monitor discharge charge power meter supply checker APP

34.22US $ 20% OFF|DL24/P Color 2.4" DC USB tester electronic load lithium battery capacity monitor discharge charge power meter supply checker APP|Battery Testers| - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

enjoy

Sharky722 · Aug 12, 2020

My JBD 120a finally arrived yesterday and I must say fairly impressed with the build quality of this little unit and looking forward to commissioning and testing.
Is everyone happy with the size of the 3x b- and c- wires or have you been upgrading to larger wire size?

thedodgersonline · Aug 12, 2020

Sharky722 said:
My JBD 120a finally arrived yesterday and I must say fairly impressed with the build quality of this little unit and looking forward to commissioning and testing.
Is everyone happy with the size of the 3x b- and c- wires or have you been upgrading to larger wire size?

Hi
Have not changed them at all, but then I have not been testing g at high amps. Still waiting for my 100a capacity tester then will run one cycle at as high as I can. I don’t think there will be any issues though.
Regards

Sharky722 · Aug 12, 2020

thedodgersonline said:
Hi
Have not changed them at all, but then I have not been testing g at high amps. Still waiting for my 100a capacity tester then will run one cycle at as high as I can. I don’t think there will be any issues though.
Regards

Just read that 10awg silicone wire is good for 120a ? so I think I'll leave as is then.
What capacity tester did you get

Pierre · Aug 13, 2020

thedodgersonline said:
Hi Pierre

you might be interested in this capacity load battery tester thingy (on my 3rd one now) anyway has Bluetooth and a port you can connect to a computer to gather data while the battery is under test. Great thing is that the low level volt cut off work too. Still max 185w but that is adequate.
If you look on the Ali list I g there is a path to where you can download the programme to your computer to link to the tester.

link
AU $41.47 26％ Off | DL24/P Color 2.4" DC USB tester electronic load lithium battery capacity monitor discharge charge power meter supply checker APP

34.22US $ 20% OFF|DL24/P Color 2.4" DC USB tester electronic load lithium battery capacity monitor discharge charge power meter supply checker APP|Battery Testers| - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

enjoy

Nice piece of kit , Dodge. You say 'your 3rd one' ? Are they all in use somewhere or have the other 2 gone 'tits up' ?

.
Trust you are keeping great , mate.

Pierre · Aug 13, 2020

Sharky722 said:
My JBD 120a finally arrived yesterday and I must say fairly impressed with the build quality of this little unit and looking forward to commissioning and testing.
Is everyone happy with the size of the 3x b- and c- wires or have you been upgrading to larger wire size?

You should be fine - only 40 amps per wire on full load and the lengts are so short , so you will be o.k.
Both Dodge and I can vouch for the unit -- great buy. Both of us have done extensive testing on it and tests are ongoing.

Sharky722 · Aug 13, 2020

pierre said:
You should be fine - only 40 amps per wire on full load and the lengts are so short , so you will be o.k.
Both Dodge and I can vouch for the unit -- great buy. Both of us have done extensive testing on it and tests are ongoing.

Yes that's what thought also.
So what's the general final topology. 3 separate lugs or try and merge all 3 into 1 lug?.

Pierre · Aug 13, 2020

Sharky722 said:
Yes that's what thought also.
So what's the general final topology. 3 separate lugs or try and merge all 3 into 1 lug?.

Just leave as is. If it ain't broke don't fix it. I put a small bolt / washers and nut through all three and then also the larger single cable with its ring terminal. Heatshrink the joint and there you go. So much easier in future for fault finding / repair etc.

thedodgersonline · Aug 13, 2020

pierre said:
Nice piece of kit , Dodge. You say 'your 3rd one' ? Are they all in use somewhere or have the other 2 gone 'tits up' ? .
Trust you are keeping great , mate.

Hi Pierre
The magic smoke escaped. Overload protection was tied to the smoke so went to the capacity tester in the sky. This one seems the goods.
Cheers

Sharky722 · Aug 13, 2020

pierre said:
Just leave as is. If it ain't broke don't fix it. I put a small bolt / washers and nut through all three and then also the larger single cable with its ring terminal. Heatshrink the joint and there you go. So much easier in future for fault finding / repair etc.

Copy that.
Looking forward to doing my own testing on the bms when this capacity testing is out of the way.

thedodgersonline · Aug 13, 2020

Sharky722 said:
Just read that 10awg silicone wire is good for 120a ? so I think I'll leave as is then.
What capacity tester did you get

Hi

waiting for this one to pitch up
AU $15.49 31％ Off | 300V 100A DC digital voltmeter ammeter voltage meter car battery capacity volt current wattmeter detector power supply tester

15.86US $ |300v 100a Dc Digital Voltmeter Ammeter Voltage Meter Car Battery Capacity Volt Current Wattmeter Detector Power Supply Tester - Voltage Meters - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

a.aliexpress.com

Regards

Pierre · Aug 13, 2020

thedodgersonline said:
Hi Pierre
The magic smoke escaped. Overload protection was tied to the smoke so went to the capacity tester in the sky. This one seems the goods.
Cheers

? I still blow stuff up on a weekly basis. ?

DGJBD Bluetooth BMS - a short review

New Member

Somewhere down South

Aussie traveller

Solar Wizard

New Member

New Member

New Member

Somewhere down South

New Member

Attachments

New Member

New Member

New Member

Somewhere down South

Somewhere down South

New Member

Somewhere down South

New Member

New Member

New Member

Somewhere down South

Similar threads