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Daly Smart BMS - odd behavior

igeorge

New Member
Joined
Apr 20, 2021
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5
Hi All
I recently installed a Daly Smart BMS on my DIY 16s2p LifePO4 battery. I'm communicating via the Bluetooth dongle, and all that seems to be working fine. I don't use a light board.

The one wierd issue is the current and SOC display in the app. The SOC will only increase to 49% regardless. If I set it to 100% when the battery is charged, it will go down with discharge as expected, but on charging will get stuck at 49%

There are also large current fluctuations shown in the app, which are not present. My Victron system and separate Victron BMS both show pretty stable levels while the Daly will be showing +-30A fluctuations.

Anyone have any experience like this? Or able to suggest a remedy:)
Cheers
Ian,
South Africa
 
I have some daly smart bms's and they do not act like that...although the SOC is a useless factor (make sure to set your battery capacity on the set parameter page). On the settings page there is an option to set the battery type, try looking at that (the daly app is not all that clear as to what it is doing, but it does work hehe)
 
Everything seems to be set correctly. The SOC on the BMS tracks the SOC on my system at the same rate, but just won't go higher than 49% on the way up. Bizarre:)

For instance, the BMS stuck at 49% even though my battery was pretty fully charged by sunset. It's now sitting at 2% on the BMS, and 52% on the system, so pretty good tracking, albeit with the offset. Maybe I should try a factory reset?

I assumed they have a built in current integrator to handle SOC. Although, given the erratic current readings, that seems dodgy anyway.
 
Check your firmware version. It must be at least version 20210222. All older ones have problems and sometimes show strange current and voltage values (short time). You can see the installed Version in the Read Param TAB on the PC Software or on the first Page in the BMS App.

1619362619477.png

Attached the Firmware 20210222-1. But check first Your Hardware Version HD version. I only tested the Firmware on the Hardware DL-BMS-R32-01E. It is very stable, no knowing problems for me. The SOC is very accurate in my installation.
 

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To upload the Firmware use the newst PC Software 1.2.5. You can get here:

 
Thanks for the assistance, but according to the android app, that is the same version I'm running.
Cheers
Ian
 
I have a daly bms 16s 48v 250amp. The chgmos keeps going off despite the batteries not being full. How do I restart it and also how do I stop it from going off
 

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High Protect 3.40 Volt is to low. Set it to 3.65 Volt. It come back itself if the voltage drop. Do not overcharge the Batterey. You have to shot off the charger if the highest cell reach 3.45 Volt. Check Your Firmware Version on the BMS.
 
High Protect 3.40 Volt is to low. Set it to 3.65 Volt. It come back itself if the voltage drop. Do not overcharge the Batterey. You have to shot off the charger if the highest cell reach 3.45 Volt. Check Your Firmware Version on the BMS.
Can you help me understand these settings below.
In particular,
1. What should be cell reference voltage.
2. What voltage should my state of charge ,soc, be based on, is it the cell reference voltage, or is it the voltage at balance.
 

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Reference voltage is 3.20 Volt (LiFepo4). SOC You can set to 100% if the Cell are about 3.45 Volt. All Cell must be first in balance. Attached You find my Screenshoots. I have 180Ah Battery 16S at the Moment. The language is german, but i hope it helps anyway..
 

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It is much easier to make the settings with the PC software with the RS485 interface.
 
Quick update - I hadn't looked at the BMS for a few days, and oddly it seems to have fixed itself. The SOC is now going up to 100%
Didn't make any changes, so no idea why it's working now.
Cheers
 
This happens every time the cell voltage is above 3.40 volts per cell for some time and the current flow is small. Then the BMS automatically recalibrates to 100% SOC because the battery is full. Now, if the set battery capacity matches the (self-measured) battery capacity, then the SOC indication about the remaining capacity is very accurate. The more accurately the real capacity of the battery matches the set capacity on the BMS, the more accurate the remaining display.
 
Reference voltage is 3.20 Volt (LiFepo4). SOC You can set to 100% if the Cell are about 3.45 Volt. All Cell must be first in balance. Attached You find my Screenshoots. I have 180Ah Battery 16S at the Moment. The language is german, but i hope it helps anyway..
Hi, I would appreciate if you can help me a bit. I read the post, but did not understand why the charge mos keeps going off. I have set the high voltage protect to 3.33. The battery discharges. The charge goes on only during discharging. If I set the high voltage protect to say 3.45, the charge goes on, until full charge. If I then correct it back to 3.33, the charge stays on. I can not change the cell reference volt setting, neither there is a manual to understand all the setting thus I need help. BC2F0024-6F0F-4691-97E3-44CB46394679.png69E5F315-C42D-4360-802B-009830266B9D.png152595FB-C47A-4805-99DB-56F3153CF854.pngD3027E5B-9C46-4C33-BA49-6175A5FB1DE7.png02BD057E-C462-42C3-BD52-1A79D0E9F5EB.pngE73C524F-0B80-4C5E-9F80-13073E3080BA.png
 
First of all, a BMS is only to protect Your Cells, not to control the charging process of the Cell / Battery! Its like a electronic fuse !!!

The charge MOS will go off, if the Cell voltage ist higher than the filed "Cell Volt high protect". It will come back, if the voltage of the Cell drops for about 0.2 volt below this point.

For proper function, You have to adjust the following Fields. All the Rest is O.K. I assume You have a Battery Pack of real 100 Ah 4 Cells LiFepo4

1. Cell volt high protect : 3.65 Volt
2. Cell volt low protect: 2.80 Volt
3. Sum volt high protect: 14.60 Volt
4. Sum volt low protect: 11.20 Volt
5. Cell reference volt: 3.20 Volt (this is for LiFepo4 Cells !)
6. Sleep waiting: 65535 (This disable the Sleep Modus forever)
7. SOC: Set this to 100% if all Cells reached 3.45 Volt. At the end of charging, the voltage ries is very fast....
8. Balanced open Starts: 3.400 volt (Means only Top balancing)
9. Balanced open diff voltage 0.020 Volt

Good luck.
 
First of all, a BMS is only to protect Your Cells, not to control the charging process of the Cell / Battery! Its like a electronic fuse !!!

The charge MOS will go off, if the Cell voltage ist higher than the filed "Cell Volt high protect". It will come back, if the voltage of the Cell drops for about 0.2 volt below this point.

For proper function, You have to adjust the following Fields. All the Rest is O.K. I assume You have a Battery Pack of real 100 Ah 4 Cells LiFepo4

1. Cell volt high protect : 3.65 Volt
2. Cell volt low protect: 2.80 Volt
3. Sum volt high protect: 14.60 Volt
4. Sum volt low protect: 11.20 Volt
5. Cell reference volt: 3.20 Volt (this is for LiFepo4 Cells !)
6. Sleep waiting: 65535 (This disable the Sleep Modus forever)
7. SOC: Set this to 100% if all Cells reached 3.45 Volt. At the end of charging, the voltage ries is very fast....
8. Balanced open Starts: 3.400 volt (Means only Top balancing)
9. Balanced open diff voltage 0.020 Volt

Good luck.
Thanks a lot! I set up high and low protect. Only, I can not setup fore sone reason the cell reference volt ( stays on 3.6) and the sleep waiting time ( stays on 3600s). The BMS is just unresponsive to these two inputs. Any ideas?
 
Sorry, no. The 4 Cell BMS is different from my 16 Cell BMS. Have you tried with input as 3,200 (Komma as separator, not point). I have to use the Komma as separator, but this can happen because i have german language on my mobile.
 
A small update. I wrote to Dali Aliexpress store and below are the answers. Apparently, if you set the sleep waiting time to 15300s, sleep is disabled on the 100A 12v model.
 

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