DGJBD Bluetooth BMS - a short review

[ELEL]

I can't think of a reason to have both the BT and the USB active at the same time. What is your plan?

I plugged in the serial / USB interface just so I could use my laptop to set / calibrate the sense voltages on each cell. Once that was done I put the shelf to use on the other JBD BMS's I have and more that I will be receiving. Only need one of them, but I want each BMS to have a BT.

The BT interface is more convenient in checking the real time status of the cells. However, in order to record the data, I need to connect it to a PC or Raspberry Pi and in such situation I would like to have both interfaces working.

 

[Horsefly]

The BT interface is more convenient in checking the real time status of the cells. However, in order to record the data, I need to connect it to a PC or Raspberry Pi and in such situation I would like to have both interfaces working.

Ahhh. Ok.

 

[thedodgersonline]

The BT interface is more convenient in checking the real time status of the cells. However, in order to record the data, I need to connect it to a PC or Raspberry Pi and in such situation I would like to have both interfaces working.

Hi - the IOS app now has a facility for logging data as well. Restriction is that the app has to be open to log this data. Just a thought.
Regards

 

[HRTKD]

Man, us Android users can't get any love from Xiaoxiang.

 

[Pierre]

Man, us Android users can't get any love from Xiaoxiang.

I agree. I run both apps on my devices and always found the iOS app to be better.

 

[Pierre]

Hi - the IOS app now has a facility for logging data as well. Restriction is that the app has to be open to log this data. Just a thought.
Regards

Hi Dodge. Trust you are well. Please tell more - how does one use this function ?

 

[thedodgersonline]

Hi Dodge. Trust you are well. Please tell more - how does one use this function ?

Hi Pierre. All good mate - dodging CoVid still. This is on the new V2 app and it is a button on the app landing page after selecting the BMS. See 2nd screenshot.

Regards

 

[Pierre]

Thanks Dodge , will try. Yea , this Covid thing has stuffed up a lot of things. Keep safe.

 

[ELEL]

I contacted the JBD manufacturer website in Alibaba and they replied that there is no option to have more than one UART/serial port. Does anyone have a JBD BMS (or the same but other other brand name) which has more than one UART/serial port. If yes, can you give me the link of the shop which sold you the BMS?

 

[Pierre]

I contacted the JBD manufacturer website in Alibaba and they replied that there is no option to have more than one UART/serial port. Does anyone have a JBD BMS (or the same but other other brand name) which has more than one UART/serial port. If yes, can you give me the link of the shop which sold you the BMS?

I have contacted my supplier about this. Will reply as soon as I have heard from her.

 

[jillae]

Until recently I have been using Daly Common Port BMS's in my experimental 12v LiFE 100Ah 4S battery pack. Very pleasing results getting in excess of 1500Wh on the discharge cycles. 'Curiosity killed the Cat' and after reading / watching Will experimenting with Bluetooth BMS's I decided that I wanted to see what goes on inside the 'brain' . I promptly ordered a DGJBD 4s 100a unit from China for $68 plus shipping.
I was pleasantly surprised when it arrived - very nice piece of kit, well made and comes with a bluetooth dongle and RS232 / USB converter and cable to connect
to PC. Wired it all up and downloaded JBD Tools V1.6 and iOS app and started experimenting. The manual, which I had to download, is quite well written bar a few
translation issues. Bluetooth as well as the serial connection work extremely well and connections are established within a few seconds. All the settings are accessible via both communication media and I am still happily experimenting with tweaking / adjusting parameters and have built up a collection of 7 different configurations.
The unit has two built-in temp. sensors and the one is on a short fly lead for strategic placement and both can be calibrated. All the other protection actions like
pack and individual cell over / under voltages , over current , cell balancing etc work very well.
The only issue I have is the calibration of the current sensing circuitry - one is supposed to be able calibrate (1) idle current (2) charge current and (3) discharge current and the device will then calculate the resultant current flow and display the result in the app. I have contacted the supplier, who then refers it to the engineer, on numerous occasions but they keep on telling me to follow the manual or to detach / re-attach all the connections to the BMS. This seems silly as all the other functions work perfectly. I think that something is lost 'in translation' due to the language barrier. The current indications have no correlation with the actual current flows , not even ratio wise. Maybe someone on the forum has experience with this particular BMS and can help me solve my 'finger trouble'
My overall impression of the device / monitoring software is very possitive and the coup de grace will be to resolve the current indication.
Looking forward to your replies / recommendations.

Hi there, nice post. If possible, please give some input in this: I recently accidentally broke my JBD-SP04S020 due to a mechanical error. So when replacing with similar (ordering) I found out Daly Smart BMS which looked to be a more modern and "updated" version then the more ugly basic JBD-SP04S020 ? Question: Is it worth to go with a Daly model or is the JBD-SP04S020 just good enough? (lifepo4 12v 4s 200a) Thanks, and please explain so I understand ?

 

[HRTKD]

Hi there, nice post. If possible, please give some input in this: I recently accidentally broke my JBD-SP04S020 due to a mechanical error. So when replacing with similar (ordering) I found out Daly Smart BMS which looked to be a more modern and "updated" version then the more ugly basic JBD-SP04S020 ? Question: Is it worth to go with a Daly model or is the JBD-SP04S020 just good enough? (lifepo4 12v 4s 200a) Thanks, and please explain so I understand ?

Don't judge a BMS by it's cover. Look in this subforum for issues with the Daly BMS. Then look for issues with the JBD 4s 120 amp. There are a few, but far fewer than you'll see with the Daly.