What is the max current you tested ANT BMS?

[rg12]

I have tested the 300A (other sellers call it 120A, which means the max current for the 24S version (all fets soldered on the pcb)) and the max I tried to go with is 250-280A which of course is never constant since it's either on an ebike or a scooter (mostly running Nucular controllers).
Any of you have tried it with more?

 

[j bjork]

I have run up to 370A that I know of. The controller is set to 400, but I dont think I ever reached it.

 

[dominik h]

I have run it with 3 mosfets missing for up to 15minutes continous with 165A, temperature stays below 50C, my 16mm phase wires reached 180C during this run. During this 50km round I had a consumption from 10.5kW per 100km which is equal to half an hour 135A continously.

My absolute peak was 250A for 1 minute with a SVMC72260 but this controller died with a big bang during a test with flux weakening activated on the main stand.

Now I changed to the 200A jikong 2A active balancer bms, because the ANT always gets hot during balancing and does not balance when current is higher than 15A. I have a 30A and an 80A fast charger.
Balancing from the active BMS is very good and not current limited, but the estimated SOC is crap. Between +1A and -1A will not be counted. My daily charge is 6A and when 1A is missing, after 10hours there are missing 10Ah in the SOC calculation. During winter it will get even worse. I drive more in winter than in summer. I installed a battery driven battery heating system with 0.8A consumption, which will completly be ignored.

 

[rg12]

I have run it with 3 mosfets missing for up to 15minutes continous with 165A, temperature stays below 50C, my 16mm phase wires reached 180C during this run. During this 50km round I had a consumption from 10.5kW per 100km which is equal to half an hour 135A continously.

My absolute peak was 250A for 1 minute with a SVMC72260 but this controller died with a big bang during a test with flux weakening activated on the main stand.

Now I changed to the 200A jikong 2A active balancer bms, because the ANT always gets hot during balancing and does not balance when current is higher than 15A. I have a 30A and an 80A fast charger.
Balancing from the active BMS is very good and not current limited, but the estimated SOC is crap. Between +1A and -1A will not be counted. My daily charge is 6A and when 1A is missing, after 10hours there are missing 10Ah in the SOC calculation. During winter it will get even worse. I drive more in winter than in summer. I installed a battery driven battery heating system with 0.8A consumption, which will completly be ignored.

Wow that 24S ANT is a beast!
I thought it may explode with 350A for a few second peaks but if you ran it for so long with 160A+ then it seems it's a tank!

and what's that about the not balancing above 15A? you mean if you charge above 15A then it doesn't perform the balance when it reaches the balance voltage trigger?

I have run up to 370A that I know of. The controller is set to 400, but I dont think I ever reached it.

370 battery amps or phase amps?

 

[dominik h]

If the charging current is higher it does not balance and if the charging current is less than 0,6A it does not balance.
I have a 10A charger , with this it works fine.
I have a 30A charger and with full current it is not balancing, balancing starts around 15A.
Same with the 80A charger.
But it still stops charging when single cell voltage limit is reached.

Normaly balancing starts in the CV phase with already reduced current.
I had a bad conntect in my battery and due to this balancing should have been starting already in the CC phase.

The Jikong BMS balances always, there is no current restriction, it is also balancing while driving with 165A current.

 

[j bjork]

370 battery amps or phase amps?

Battery amp.

I can confirm that it is not balancing until the charging current drops, but for me it seems that it has to drop to 10A before it starts.
And I can also confirm that it gets too hot fast during balancing. I havent noticed that it stops balancing at low A, but I probably havent let it drop low enough before disconnecting the charger.
My cells stay balanced anyway, so it hasent been a problem so far.

 

[dominik h]

I havent noticed that it stops balancing at low A, but I probably havent let it drop low enough before disconnecting the charger.

I tried to balance my pack with very low charging current over 3 days before I disassembled it (288 screws ) and changed to massiv 120mm copper connectors .

With my 10A charger balancing worked always.

 

[rg12]

So anything below 15A charge current is going to balance and 15A and above doesn't trigger the balance?
That's a weird function...

About the BMS getting hot while balancing, I take it down to 100-120mA instead of the default 180mA and sometimes it will balance even faster since when it get to 60c it halts balance, waits for a 1-2 degree drop and starts again thus making the slower balance currents be faster since they don't experience a halt every 30 seconds or so.

 

[dominik h]

I do not know if it is excactly 15A.
I have seen it not balancing with 18A and I have seen it a few minutes later balancing with about 11.8A.
I am not sitting all the time next to my 8kWh battery pack until it is fully charged or balanced.
Now that I have a charger with variable charging current, I have changed to the Jikong active BMS with 2A balancing current, so I can´t check it anymore.

I think the BMS software knows that it is useless to try balance with 180mA while charging with more than 10A.

 

[rg12]

I do not know if it is excactly 15A.
I have seen it not balancing with 18A and I have seen it a few minutes later balancing with about 11.8A.
I am not sitting all the time next to my 8kWh battery pack until it is fully charged or balanced.
Now that I have a charger with variable charging current, I have changed to the Jikong active BMS with 2A balancing current, so I can´t check it anymore.

I think the BMS software knows that it is useless to try balance with 180mA while charging with more than 10A.

but the balance cycle usually keeps on working after the charge is done.
Why wouldn't it be smart though reducing 180mA from each cell group that needs to go down a little while charging them?

 

[Dui ni shuo de dui]

It can take 600 amps peak, tested and approved. :wink:

 

[rg12]

It can take 600 amps peak, tested and approved. :wink:

How long do you consider peak?