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DGJBD Bluetooth BMS - a short review

pierre said:
So far very satisfied with this BMS and all its functionality. For now I am moving on to testing another BMS.
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Hi mate
Have you found a better app to use with this BMS? I fi d the one they supply / recommend very crappy. Been looking for something different / better

regards
 
thedodgersonline said:
Hi mate
Have you found a better app to use with this BMS? I fi d the one they supply / recommend very crappy. Been looking for something different / better

regards
Click to expand...
Hi Dodger , I am just using the one downloaded from the iStore onto my iPad. Had to pay a few $ to get configuration functionality though. Works fine for me. For full functionality you will have to connect to your PC via UART / RS232.
Should you find something better please let me know. Regards.
 
thedodgersonline said:
Hi mate
Have you found a better app to use with this BMS? I fi d the one they supply / recommend very crappy. Been looking for something different / better

regards
Click to expand...
Hi dodger
I was just looking at Wills videos for this bms and he said he has the enterprise version for download on the website.
I'm looking at this bms for my rig.
 
Sharky722 said:
Hi dodger
I was just looking at Wills videos for this bms and he said he has the enterprise version for download on the website.
I'm looking at this bms for my rig.
Click to expand...
Hi Sharky722
No link that I could find - for IOS anyway. If you find one perhaps you can put up the link.
Regards
 
I ordered 3 JBD-SP04 BMS and 3 Bluetooth adapters. Has anybody have experience using more that BMS with the app?
 

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pierre said:
I have been playing with this BMS for a while now and must must say that I am very satisfied with the performance. All the protection functions work great - the only one that I have not tested is the 'low temp cut off'. This unit has two NTC sensors - the one is on a fly lead but the other one is embedded somewhere in the build. I have dunked the one (on the fly lead) into a glass of melting ice but it did not shut off. My contention is that both sensor inputs are required to trigger a 'shut off' and that implies that I will have to 'freeze' the complete unit as Will P does.
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I had what I thought was a problem when testing the low temp cutoff. It seems to be a odd "feature" of the controller that was throwing me off. I expected in the battery status display to see the charging switch go to OFF when temperature is out of range and I was verifying it with a small current from a LED. Turns out you need (in my 120a version) at least 1 amp of charging before it will shut off. If your not actually charging it will not shut off. I found it only was effected by the thermistor on the wire. But I see in some version of the software there is a on/off (yes/no) for each thermistor. Attached is a photo of the location of the on board #2 thermistor, At the end of the row of FETs. So It appears to work. I wounder why everybody that sells these are so reluctant to provide any documentation.
 

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kringineering said:
I had what I thought was a problem when testing the low temp cutoff. It seems to be a odd "feature" of the controller that was throwing me off. I expected in the battery status display to see the charging switch go to OFF when temperature is out of range and I was verifying it with a small current from a LED. Turns out you need (in my 120a version) at least 1 amp of charging before it will shut off. If your not actually charging it will not shut off. I found it only was effected by the thermistor on the wire. But I see in some version of the software there is a on/off (yes/no) for each thermistor. Attached is a photo of the location of the on board #2 thermistor, At the end of the row of FETs. So It appears to work. I wounder why everybody that sells these are so reluctant to provide any documentation.
Click to expand...
Thank you for your post. Wondered where the #2 NTC was. I agree about the documentation -- it is like an easter egg hunt !
 
More tidbits of information on the JBD SP04S020 BMS.

I found at least on my version (120 amp) the single temperature displayed on the bluetooth app Home page switches between the highest of the two Thermistors .

The setup values seem to be Volatile. If you unplug the balance leads the limits you changed from default will have to be reset.

The constant drain from the BMS seem to be about 23 ma and doesn't decrease when you turn the BMS off. So by itself it will discharge a 100AH battery in 181 days.

I measured the drop across the FETs at 23 amps load was 5 mv so that .115 watts. Extrapolated to full 120a current that would be .6 watts not bad. BUT the Shunt resistor is .0004 ohms (5 X .002 in parallel) that would be 5.76 watts at 120 A. So that seem like were most of the heat is generated.

I was told by the seller to get the android blue tooth app from www.jiabaida.com/xiaoxiang.apk Seems much less buggy that other I have tried.
 
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kringineering said:
More tidbits of information on the JBD SP04S020 BMS.

I found at least on my version (120 amp) the single temperature displayed on the bluetooth app Home page switches between the highest of the two Thermistors .

The setup values seem to be Volatile. If you unplug the balance leads the limits you changed from default will have to be reset.

The constant drain from the BMS seem to be about 23 ma and doesn't decrease when you turn the BMS off. So by itself it will discharge a 100AH battery in 181 days.

I measured the drop across the FETs at 23 amps load was 5 mv so that .115 watts. Extrapolated to full 120a current that would be .6 watts not bad. BUT the Shunt resistor is .0004 ohms (5 X .002 in parallel) that would be 5.76 watts at 120 A. So that seem like were most of the heat is generated.

I was told by the seller to get the android blue tooth app from www.jiabaida.com/xiaoxiang.apk Seems much less buggy that other I have tried.
Click to expand...
Thanks for posting your findings. Much appreciated. More post like this one by other users / experimenters are encouraged and welcomed as this BMS is becoming quite popular.
It seems that the iOS app is less quirky in certain areas of operation.
 
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I also have the JBD-SP04S020 but it won't connect to bluetooth via IOS. Somebody has the same problem and fixed it?
 
pierre said:
Their service is great and they always reply to emails etc.
The product code is : JBD-SP04S020
Click to expand...

I have the same unit 80Ah 4S BMS with this product code but I can't get my bluetooth connection working. Any tips?
 
Giela said:
I have the same unit 80Ah 4S BMS with this product code but I can't get my bluetooth connection working. Any tips?
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I really do not know. Mine worked 1st time and connects each time w/o fail. You obviously download the latest iOS app from the app store. To get full access to the settings on the BMS you need to pay a few $ when downloading. Once you plug the BT module into the BMS port and connect via the app the BT module will light up with a blue light. This is an indication that comms have been established.
Not sure if you have the UART RS232 module and cable to connect to your Windows PC. Read my earlier posts where to download the app and drivers etc. This way I also had no problems but you need to play around to get the feel of ‘keys’ and what they do. I have previously also posted the operations manual to guide you. Good luck.
 
pierre said:
I really do not know. Mine worked 1st time and connects each time w/o fail. You obviously download the latest iOS app from the app store. To get full access to the settings on the BMS you need to pay a few $ when downloading. Once you plug the BT module into the BMS port and connect via the app the BT module will light up with a blue light. This is an indication that comms have been established.
Not sure if you have the UART RS232 module and cable to connect to your Windows PC. Read my earlier posts where to download the app and drivers etc. This way I also had no problems but you need to play around to get the feel of ‘keys’ and what they do. I have previously also posted the operations manual to guide you. Good luck.
Click to expand...

I do not have the RS232 port/module. The weird thing is, it worked for a couple of minutes on the 4S 12V batterypack. I upgraded this pack to a 8S 12V pack in the meantime. The blue light is on but it keeps saying " waiting on data"

If it worked before and the parameters aren't changed I guess the device is broken somehow?!
 
Giela said:
I do not have the RS232 port/module. The weird thing is, it worked for a couple of minutes on the 4S 12V batterypack. I upgraded this pack to a 8S 12V pack in the meantime. The blue light is on but it keeps saying " waiting on data"

If it worked before and the parameters aren't changed I guess the device is broken somehow?!
Click to expand...
Do not understand. 8s is a 24v pack . So , do you have an 8s BMS ? How did you connect the 8 cells ?
 
No from the 8S I made 4 packs of 2S and then made a 12V pack. Like this configuration:
 
Giela said:
I do not have the RS232 port/module. The weird thing is, it worked for a couple of minutes on the 4S 12V batterypack. I upgraded this pack to a 8S 12V pack in the meantime. The blue light is on but it keeps saying " waiting on data"

If it worked before and the parameters aren't changed I guess the device is broken somehow?!
Click to expand...
Hi
I had a few of these BMS on test and I found that one stopped working. Blue light was on but no connection. The app did not even recognise it. I unplugged the Bluetooth module and plugged in a spare one and all was ok. I plugged the failed one into another BMS and it worked fine. Had some discussions with the vendor and they said that these modules can ‘lock’ themselves onto other receivers so the app will not see it.
BTW - you can buy the Bluetooth modules on AliExpress - they are about $A10 and there is free delivery. Might be worth investing in one (or two) if you plan on using them a lot.
Regards
 
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