bluetooth BMS?

Batteries, Chargers, and Battery Management Systems.
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agniusm   10 MW

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Re: bluetooth BMS?

Post by agniusm » Dec 28 2019 8:59am

Guys, is it possible to cut off temp probe and fit a switch to short the wires and use it to switch load off that way?

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izeman   100 GW

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bluetooth BMS?

Post by izeman » Dec 28 2019 11:03am

agniusm wrote:Guys, is it possible to cut off temp probe and fit a switch to short the wires and use it to switch load off that way?
Most of the boards have an unpopulated K1 plug that does exactly what you want.

maxx123   1 µW

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Re: bluetooth BMS?

Post by maxx123 » Dec 28 2019 11:34am

I have smart bms with software : ANT.BMS APP /firmware issue. The internal battery temperature sensor 1: shows -13c 2: 17c Ive tried rebooting , reinstalling. samething hooked up another smart bms same thing, even tried another sell phone. same. my problem is I went with the setting on my cell hooked up the second bms it sent the same info to the bms.
I need to reboot the bms wipe it clean same with my cell phone for it to work, start fresh. how does one reset bms?
it activates by connecting red and black wire on it. software side does reboot software not firmware so i am stuck.

https://www.aliexpress.com/item/32975679107.html

The people on this store are totally lost, great price, crap knowledge

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agniusm   10 MW

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Re: bluetooth BMS?

Post by agniusm » Dec 28 2019 12:51pm

izeman wrote:
Dec 28 2019 11:03am
agniusm wrote:Guys, is it possible to cut off temp probe and fit a switch to short the wires and use it to switch load off that way?
Most of the boards have an unpopulated K1 plug that does exactly what you want.
Thanks a lot mate.

john61ct   1.21 GW

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Re: bluetooth BMS?

Post by john61ct » Dec 28 2019 2:17pm

OK, I see now LLT claims to be a subsidiary of JBD.

My question is, as @eee291 states, are LLT really just a seller of the exact same BMS (JBD makes) or do they design and build their own products?

If the latter, does anyone know both well enough to comment on differences?

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izeman   100 GW

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Re: bluetooth BMS?

Post by izeman » Dec 28 2019 2:32pm

agniusm wrote:
Dec 28 2019 12:51pm
izeman wrote:
Dec 28 2019 11:03am
agniusm wrote:Guys, is it possible to cut off temp probe and fit a switch to short the wires and use it to switch load off that way?
Most of the boards have an unpopulated K1 plug that does exactly what you want.
Thanks a lot mate.
You're welcome. See this pic as well:

Screenshot from 2019-12-28 20-32-03.png
Screenshot from 2019-12-28 20-32-03.png (149.28 KiB) Viewed 2153 times

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eee291   100 kW

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Re: bluetooth BMS?

Post by eee291 » Dec 28 2019 5:13pm

john61ct wrote:
Dec 28 2019 2:17pm
OK, I see now LLT claims to be a subsidiary of JBD.

My question is, as @eee291 states, are LLT really just a seller of the exact same BMS (JBD makes) or do they design and build their own products?

If the latter, does anyone know both well enough to comment on differences?
When you buy a BMS from LTT its still labeled as a JBD BMS so I'm pretty sure. I used to buy them from there because you'd always get the newer versions, on Aliexpress it's pretty random.

SilverLine   100 W

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Re: bluetooth BMS?

Post by SilverLine » Jan 04 2020 11:45am

Just got the 20s JBD BMS Up and running. Why is resistance uniformity not showing anything ? And where can I check IR of the cells ?

And what does this lock , unlock thing om the Main screen ?

Thanks
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eee291   100 kW

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Re: bluetooth BMS?

Post by eee291 » Jan 04 2020 12:05pm

I'm pretty sure it can't check IR of the pack or individual cells.
The battery score improves or worsens based on the condition of the battery, try cycling it a few times.

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Re: bluetooth BMS?

Post by SilverLine » Jan 04 2020 12:33pm

eee291 wrote:
Jan 04 2020 12:05pm
I'm pretty sure it can't check IR of the pack or individual cells.
The battery score improves or worsens based on the condition of the battery, try cycling it a few times.
Thanks....
What about that lock /unlock thing on the dashboard ?

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eee291   100 kW

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Re: bluetooth BMS?

Post by eee291 » Jan 04 2020 1:15pm

It disables the C- discharge port, good when you are transporting the battery.

SilverLine   100 W

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Re: bluetooth BMS?

Post by SilverLine » Jan 04 2020 1:29pm

eee291 wrote:
Jan 04 2020 1:15pm
It disables the C- discharge port, good when you are transporting the battery.
Oh... So when im only using this BMS for charge, this has no use for me ?

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eee291   100 kW

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Re: bluetooth BMS?

Post by eee291 » Jan 04 2020 1:30pm

Pretty much, I've only used it once myself.

SilverLine   100 W

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Re: bluetooth BMS?

Post by SilverLine » Jan 04 2020 1:44pm

eee291 wrote:
Jan 04 2020 1:30pm
Pretty much, I've only used it once myself.
Just tested the function. You are right.... Thanks again.

SilverLine   100 W

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Re: bluetooth BMS?

Post by SilverLine » Jan 05 2020 5:18am

kolin wrote:
Mar 25 2019 1:45pm
Hi,
I am working on my little software project for reading this BMS wirelessly over BLE from ESP32.
ESP32 connects to BLE module, sends request for data and parses incoming data. Parsed data can be shown or LCD.

Not everything is implemented, code is a mess and there are bugs. But basics works.

https://github.com/kolins-cz/Smart-BMS-Bluetooth-ESP32

I hope it will be useful to someone else.
That is a very cool project. I dont understand why nobody responded to your reply. Did you ever get this project up and running ??

quamau   1 W

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Re: bluetooth BMS?

Post by quamau » Jan 06 2020 6:10am

A little question for those using recent v.3.1.1013 of the xiaoxiang app.

I find this new version very important, as it provides access to all the functions, including those which required the UART box (kinda impractical once the BMS is stashed away).

But... I do not find anymore choice between "charge balance" and "static balance". More importantly, when looking at the screen with single cell voltages during charge, I cannot see the flashing "B" attesting that a specific cell is being balanced. (To be precise, only cell 1 sometimes shows "B" for a brief moment but only when changing into the cell screen.)

It seems that everything is working correctly, cells remain balanced, and the pre-charge unbalalanceis smaller than post-charge. Still, I'd like to be sure that everything is ok. Am I missing something?

newsky526   10 µW

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Re: bluetooth BMS?

Post by newsky526 » Jan 08 2020 8:57am

quamau wrote:
Jan 06 2020 6:10am
v.3.1.1013 of the xiaoxiang app.
It's app for Android? Do you have a link for downloading?

Yungyakz   10 mW

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Re: bluetooth BMS?

Post by Yungyakz » Jan 08 2020 5:31pm

Hi, i just recieved my bms . Does anyone have a link where i can download vbms2?

https://www.aliexpress.com/item/3299755 ... KSSNd&mp=1

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Re: bluetooth BMS?

Post by quamau » Jan 11 2020 11:14am

Newsky256: yes, it's android app, link provided by eee perhaps one page back, it was a post on Dec 10

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Acido   10 mW

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Re: bluetooth BMS?

Post by Acido » Jan 11 2020 12:55pm

Yungyakz wrote:
Jan 08 2020 5:31pm
Hi, i just recieved my bms . Does anyone have a link where i can download vbms2?

https://www.aliexpress.com/item/3299755 ... KSSNd&mp=1
here you go
https://www.lithiumbatterypcb.com/smart ... -download/

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Acido   10 mW

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Re: bluetooth BMS?

Post by Acido » Jan 11 2020 12:57pm

SilverLine wrote:
Jan 05 2020 5:18am
kolin wrote:
Mar 25 2019 1:45pm
Hi,
I am working on my little software project for reading this BMS wirelessly over BLE from ESP32.
ESP32 connects to BLE module, sends request for data and parses incoming data. Parsed data can be shown or LCD.

Not everything is implemented, code is a mess and there are bugs. But basics works.

https://github.com/kolins-cz/Smart-BMS-Bluetooth-ESP32

I hope it will be useful to someone else.
That is a very cool project. I dont understand why nobody responded to your reply. Did you ever get this project up and running ??
There is a product simmilar to that, check out DaveGa, you can make one your self for 20$ or get the new model thats far more advanced

john61ct   1.21 GW

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Re: bluetooth BMS?

Post by john61ct » Jan 11 2020 2:27pm


Acido wrote:check out DaveGa, you can make one your self for 20$ or get the new model thats far more advanced
Link please?

https://www.google.com/search?q=site%3A ... com+DaveGa


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eee291   100 kW

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Re: bluetooth BMS?

Post by eee291 » Jan 11 2020 3:41pm


john61ct   1.21 GW

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Re: bluetooth BMS?

Post by john61ct » Jan 11 2020 6:55pm

OK thanks
https://www.electric-skateboard.builder ... r/71509/17

So the data comm protocols for these BMS are the same as that used for DaveGA?

Or just talking about using it as a jumpoff point for a BMS-specific display project?

SilverLine   100 W

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Re: bluetooth BMS?

Post by SilverLine » Jan 11 2020 6:57pm

Yeah I know Davega, i´m in the esk8 world also. But the davega only works with vesc protokol right ??

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