Daly BMS current calibration

[Le noble]

Hello everyone

I have A bluejoy Battery 200Ah 16s
Equiped with Daly BMS 150A

While trying to upgrade the BMS to connect to a Sorotec inverter I accidently reset the BMS To factory settings. Everything get blank.
I set again all parameters and BMS work again
But still one problem, current reading is not correct reading on the bluetooth app or PC software is 6 times greater than real current.
I tried calibration using PC software but no result,
In these photos, charging is 40amp reading is 216.5, calibration is rejected by software, red flag.

Does any one has solution


Thanks and regards to whom read this post

 

[chladekj]

Hello,
try to change the value of Cur sampling Res:

• If your readings are 6x higher, you must multiply the value by 6 to get the correct reading.
• The real value will be somewhere between 0,1-0,5mΩ

 

[Le noble]

Thanks for your help
I will try it

 

[Berseker]

Hello,
try to change the value of Cur sampling Res:

• If your readings are 6x higher, you must multiply the value by 6 to get the correct reading.
• The real value will be somewhere between 0,1-0,5mΩ

View attachment 146940

I have a similar problem.
250a 16s daly. Reads -3.6amps with zero load.
mine is reading 0.1Mohm on the software, going by your analogy, so i shud multiply it by 3.6, so will set it 0.36 or 0.3 if 0.36 isnt accepted



edit: so set it to 0.26 and this seemed to have resolved the issue. it reads zero amps on no load and then reads the idle consumption of the inverter when its powered on.

i noticed that the bms refresh rate isnt so smooth...as it flickers to zero for a few seconds

 

[Damon YIP]

I have a similar problem.
250a 16s daly. Reads -3.6amps with zero load.
mine is reading 0.1Mohm on the software, going by your analogy, so i shud multiply it by 3.6, so will set it 0.36 or 0.3 if 0.36 isnt accepted



edit: so set it to 0.26 and this seemed to have resolved the issue. it reads zero amps on no load and then reads the idle consumption of the inverter when its powered on.

i noticed that the bms refresh rate isnt so smooth...as it flickers to zero for a few seconds

The current acquisition value cannot be modified. We calculate the value based on the number of sampling resistors. After modification, the current acquisition will be messed up! Your 3.6A is the zero drift current of the resistive load. You only need to set 4A on the current wave and set 0A calibration on the app, and it will be OK.

 

[Damon YIP]

Hello,
try to change the value of Cur sampling Res:

• If your readings are 6x higher, you must multiply the value by 6 to get the correct reading.
• The real value will be somewhere between 0,1-0,5mΩ

View attachment 146940

Your CADC filter is unstable due to resistive load interference. You need to ask the store to add a CADC to your program.

 

[Damon YIP]

Hello,
try to change the value of Cur sampling Res:

• If your readings are 6x higher, you must multiply the value by 6 to get the correct reading.
• The real value will be somewhere between 0,1-0,5mΩ

View attachment 146940

Noticed! The value of this current acquisition must not be changed! ! ! !

 

[Checkthisout]

Noticed! The value of this current acquisition must not be changed! ! ! !

What should it be set to?

My readings are all screwed up now and my SOC is grossly incorrect after trying to get the BMS to read the correct current.

Fully charged the bms reads 3.7% charged.

 

[Damon YIP]

What should it be set to?

My readings are all screwed up now and my SOC is grossly incorrect after trying to get the BMS to read the correct current.

Fully charged the bms reads 3.7% charged.

Please set back to the regular sampling resistor value. If you are troubled by current jumps, just ask for help and ask for an upgrade to a program with CADC.

 

[Checkthisout]

Please set back to the regular sampling resistor value. If you are troubled by current jumps, just ask for help and ask for an upgrade to a program with CADC.

I found and adjusted soc manually.

You mean ask daly for new firmware?

 

[Damon YIP]

I found and adjusted soc manually.

You mean ask daly for new firmware?

No, what I mean is: If your SOC acquisition is inaccurate due to current jitter, you can update the program with CADC.

 

[Checkthisout]

No, what I mean is: If your SOC acquisition is inaccurate due to current jitter, you can update the program with CADC.

Ah. Ok.

What is CADC?

 

[Damon YIP]

Ah. Ok.

What is CADC?

This is a current filter optimization logic we set up for resistive loads.

 

[Checkthisout]

This is a current filter optimization logic we set up for resistive loads.

Ok. So who do I talk to in order to get it and where?

I purchased the BMS on Amazon from the Daly store.