larsb
1 MW
I put liquid tape on the other connector already before as several wires wanted to slide out on that one. Should have followed the logic 
bluetooth BMS?
- Thread starter aethyr
- Start date
thundercamel
10 kW
Lol, every bluetooth device I've ever used has been short range, which is all it was designed to be. I feel lucky whenever my BMS connects from the garage to my living room.Okami said:
eee291 said:
This link is outdatet: "Sorry, this item is no longer available!"
Searching for a replacement, I found this ad on IC GOGOGO store
https://www.aliexpress.com/item/33049139356.html
which has an "UART Box" - is this what I need?
I have this BMS:
https://www.aliexpress.com/item/32856349172.html
ANT Smart BMS 10s to 24s 300A w/ display
And where can I attach the serial box?
Do I have to pull the bluetooth module off?
Or can I use the display port, which looks like a serial connection as well?
I will try to get away without the PC software, but regarding the delivery time, I prefer to have the programmer box handy in case I need it.
hm. looks like they have changed the board.
I has printed on silk
The BT module is soldered to the board,so I don' want to unsolder this to connect a serial adaptor.
Can I connect a PC software at all?
Do I need one, at all?
I don't see any other serial port than the one to the display on the main board.
There is another serial connector unpopulated on the display, and a CAN as well,
But I don't hink that I want connect my PC to the display, do I?
anyway, the display board is labelled RV4.8 in silk, and "LCD/LED5VQ" on a paper sticker attached
I has printed on silk
Code:
RV24.1.4
ANT-BMS-24S
WWW.MAYIBMS.COMThe BT module is soldered to the board,so I don' want to unsolder this to connect a serial adaptor.
Can I connect a PC software at all?
Do I need one, at all?
I don't see any other serial port than the one to the display on the main board.
There is another serial connector unpopulated on the display, and a CAN as well,
But I don't hink that I want connect my PC to the display, do I?
anyway, the display board is labelled RV4.8 in silk, and "LCD/LED5VQ" on a paper sticker attached
Attachments
looked up mayibms.com, but can't get very far there.
May be someone capable of Chinese language could go farther.
They have an "EN" button, but that seems just to translate the menu, not the content.
Their images still seem to display the old versions of the BMS.
So I don't see what all those unused connectors on my "new version" board might be useful for.
May be someone capable of Chinese language could go farther.
They have an "EN" button, but that seems just to translate the menu, not the content.
Their images still seem to display the old versions of the BMS.
So I don't see what all those unused connectors on my "new version" board might be useful for.
I just bought this BMS https://www.aliexpress.com/item/32840772926.html?spm=a2g0s.9042311.0.0.27424c4dWHUaFR
After connected all balance wire and connected to pc, the software in PC show wrong data in new Samsung 25R cell 1 (0.5V) and cell 2 (1.6V)
I already measure from the cell balance wire with multimeter and the data is same as other 3.5V.
also the cell 1 and 2 voltage even show less in Mobile version than in PC's.
Do I have to setup some parameter ? I order Li-on 20S version
Have anyone got it issue ?
After connected all balance wire and connected to pc, the software in PC show wrong data in new Samsung 25R cell 1 (0.5V) and cell 2 (1.6V)
I already measure from the cell balance wire with multimeter and the data is same as other 3.5V.
also the cell 1 and 2 voltage even show less in Mobile version than in PC's.
Do I have to setup some parameter ? I order Li-on 20S version
Have anyone got it issue ?
Attachments
eee291
100 kW
You have to connect the B- on the BMS as well, only the balance wires is not enough.
krlenjuska
10 W
- Joined
- Feb 18, 2019
- Messages
- 94
I have 1 question about JBD bluetooth BMS.
Is android app enough for settings like charging voltage, balance start voltage and discharge cutoff voltage? I want to charge my pack to 4.10V. I dont wanna buy UART module if i dont need it.
Thanks!
Is android app enough for settings like charging voltage, balance start voltage and discharge cutoff voltage? I want to charge my pack to 4.10V. I dont wanna buy UART module if i dont need it.
Thanks!
krlenjuska
10 W
- Joined
- Feb 18, 2019
- Messages
- 94
zipoman said:
Thanks i ordered 6S-10S version.
Tolkano
100 W
How long does the bluetooth module last on these things? Mine seems to have killed itself after about 6 months
tmho
1 kW
Further to my post above dated June 21, 2019, on September 21, 2019, I got the following readings.tmho said:
Voltage of the pack: 50.2V
Capacity of the pack: 6.230AH (47%)
Highest voltage of the cells: 3.590V
Lowest voltage of the cells: 3.588V
After that, I have not used the battery (no charging and no discharging). Today, I have the following readings.
Voltage of the pack: 48.3V
Capacity of the pack: 0.836AH (7%)
Highest voltage of the cells: 3.452V
Lowest voltage of the cells: 3.450V
This time, it seems that the capacity should not decrease by that much even though the BMS may still draws some current during this storage period. Am I correct? Is there something wrong with the app or I did not set the parameters properly?
P.s. My battery is 14S4P. I set the no. of batteries to 14s and the battery physical capacity to 13.5AH. I have reset to factory settings and set 14s and 13.5AH again, but still got the above readings.
tmho
1 kW
Also, I have downloaded the app for iphone hoping that it will be normal. But after opening the app, it just keeping scanning and cannot connect to the battery. Could somebody help me on this please?
eee291
100 kW
Hey guys, I thought I'd make an announcement about the updated JBD App and PC programming software.
I know a few guys who don't update and then get issues with the newer Android versions and what not.
Here are the links:
Link to the App and PC soft.
http://www.jiabaida.com/home-1.7-info-id-104-catId-52.html
Direct link to the Zip file.
http://www.jiabaida.com/uploads/soft/xiaoxiangBMS.zip
Some pics:
https://imgur.com/a/lWp3iOA
When trying to connect to your BMS, the App will ask you to make a 6 digit password (there is no confirmation so be careful!)
It looks like you can change a lot more settings than before, looks like most people won't be needing the wonky PC dongle :thumb:
I know a few guys who don't update and then get issues with the newer Android versions and what not.
Here are the links:
Link to the App and PC soft.
http://www.jiabaida.com/home-1.7-info-id-104-catId-52.html
Direct link to the Zip file.
http://www.jiabaida.com/uploads/soft/xiaoxiangBMS.zip
Some pics:
https://imgur.com/a/lWp3iOA
When trying to connect to your BMS, the App will ask you to make a 6 digit password (there is no confirmation so be careful!)
It looks like you can change a lot more settings than before, looks like most people won't be needing the wonky PC dongle :thumb:
tmho
1 kW
I just found out why I got such readings. They calculate the capacity (or state of charge) based on the voltage of the cells. From the latest version of the app, I can see that they set 3.405V as 0% and 3.477V as 10%. Therefore, my cells at 3.45V will be treated as 7% (7% of 13.5AH is 0.945AH). I understand such method (state of charge based on the voltage) is not that accurate. However, if somebody know the most appropriate voltages for various state of charge (for lithium ion cells), please let me know so that I can change the settings in the app.tmho said:
There are three factors there, which are only loosely if not barely related to each other.tmho said:
SoC, at least between 100% and 0%, is only very roughly related to voltage, and even then only after isolated and resting for some time.
Capacity, aka State of Health, can only be determined accurately through precisely timed discharge tests with a CC load. Roughly with an Ah / coulomb counter, but need to cycle completely from standard 100% Full to 0% empty SoC benchmark points.
Getting the actual SoC very precisely can be done using similar tests once the Ah capacity has been determined.
I do not know of any BMS I would trust for any of these.
Other than voltage of course, but that accuracy needs to be verified, calibrated against separate known good instrumentation as well.
SilverLine
100 W
Hallo
If i buy the cheapest model, the one with lowest Amp rating (like the JBD 20s 30a), and only use the BMS for charging, and bypassing discharged. Will I still have most of the cool features, like cell monitoring via app, cell ballancering, and manuel ballancing if a cell drift ?
Thanks
If i buy the cheapest model, the one with lowest Amp rating (like the JBD 20s 30a), and only use the BMS for charging, and bypassing discharged. Will I still have most of the cool features, like cell monitoring via app, cell ballancering, and manuel ballancing if a cell drift ?
Thanks
SilverLine
100 W
No, just only using the BMS as "charge only".. And connect the main negative wire directly from battery to speed controller. I am aware, that I loose some safety.
But thanks... And its also possible to se how many aH i put back in the battery when charging ?
Does it show how many mAh you put back in each cell ?
But thanks... And its also possible to se how many aH i put back in the battery when charging ?
Does it show how many mAh you put back in each cell ?
thundercamel
10 kW
Thanks eee! I wonder how far the functionality of the 6 digit passcode extends to, but I did get the new software up and running.eee291 said:
I now own three of the 14s 60a JBD units from here. They turned out to be a v1.3, v1.4, and just now a v1.6 which seems to be a pretty big revision. Two of the mosfets and two of the shunt resistors are gone to make room for more balance circuitry, but at least these mosfets are rated at about half the RDS of the old ones.
KNB3308A 80V 9mOhm 80A
145N08A 80V 4.8mOhm 145A
I forgot to look at what values came programmed with this v1.6 unit, and pasted in the settings I was using from the v1.3 unit that it's replacing. If anyone reads the default settings from a v1.6 unit, let me know if the shunt resistor is still set to 0.2 mR please.
Open images in a new tab for full resolution. V1.4:
V1.4:
V1.6:
V1.6:
thundercamel
10 kW
As far as I know, the JBD BMS only shows instantaneous voltage and amperage readings. Wattage on the smartphone app is calculated on the fly I believe, and anything showing capacity levels or mAh are estimated from the current voltage. There are adjustable parameters for what voltage your cells are at for every 20% of their capacity level to adjust that calculation it gives you.SilverLine said:
