Samsung SDI BMS info?

[josh-michigan]

Hi, i recently acquired some Samsung SDI ESS lithium ion modules, and they have an active balancer/bms that does keep the cells balanced.

does anyone know any details about this bms? Is there any way to interface with it like canbus?

thx Everyone!

 

[Solar Guppy]

Unfortunately you are unlikely to find this as that is a proprietary brms

You can try at https://secondlifestorage.com/index.php as they are repurposing batteries and post allot about bms

 

[jancoopman]

Hi josh,

Had any luck so far communicating with the bms? I have both 7 of the same modules as you and will start to investigate them after my holiday(1week to go). Worst case scenario for me is to reprogram the stm32f7 (my current job involves programming stm32 processors so this isn't as worse as it sounds for me) maybe we can work together to get to a working solution...

Greets

 

[Jeecraigs]

Hi josh,

Had any luck so far communicating with the bms? I have both 7 of the same modules as you and will start to investigate them after my holiday(1week to go). Worst case scenario for me is to reprogram the stm32f7 (my current job involves programming stm32 processors so this isn't as worse as it sounds for me) maybe we can work together to get to a working solution...

Greets

Hi there - I have the same : similar Samsung ESS unit I’m looking to use - is the BMS self balancing or does it need to be activated ( I’d assume self balancing but not sure ) - would be interested to see if it can be accessed / programmed - that would be great ! In the meantime is it ok to charge these packs to a lower capacity ( 3.7 or 4V ) without balancing ?

 

[Jeecraigs]

Hi there - I have the same : similar Samsung ESS unit I’m looking to use - is the BMS self balancing or does it need to be activated ( I’d assume self balancing but not sure ) - would be interested to see if it can be accessed / programmed - that would be great ! In the meantime is it ok to charge these packs to a lower capacity ( 3.7 or 4V ) without balancing ?

3.7 or 4V per cell I mean

 

[Batronca]

I did it without BMS ( open loop) for couple years is working fine.

 

[Jeecraigs]

I did it without BMS ( open loop) for couple years is working fine.

Thanks - what voltages did you charge to ? Did you keep it below max just to be safe ?

 

[Batronca]

Here my setting

 

[innocent.smith]

Hello, I have 12 of these running on a solar system, right now being blind-managed by my Sol-Ark inverter. I am a little buffaloed by the technicalities of setting the maximum charge in the Sol-Ark. I should have a theoretical 720 Ah of capacity (42kWh I believe). However, the few times I've used my power at night (this whole system is off-grid), my generator recharged the batteries to "full" with only 4 kW.

Is there a way to plug a screen or monitor into the CANbus port on the Samsung BMS? Should I configure my Sol-Ark to charge the batteries to their maximum operating voltage? It not, what margin should I leave available? My units show a max operating voltage of 65.6 Vdc.