mAh usage on Grintech BMS (Storage)

[markz]

How much mAh or uAh does the BMS on a Grintech battery use if not turned off?
52V 14.5Ah using NCR21700A


Thanks

 

[john61ct]

Not listed in the data sheet?

An email to Grin or DM to Justin then

PS you need the "realtime" mA unit of current flow rate, mAh is a static quantity, would be "mAh per hour" or other unit of time.

 

[markz]

Not listed in the data sheet?

An email to Grin or DM to Justin then

PS you need the "realtime" mA unit of current flow rate, mAh is a static quantity, would be "mAh per hour" or other unit of time.

That never crossed my mind, I'm so used to buying generic ebay "China" purchases and not a reputable solid company like Grintech.

I do remember reading about and I am thinking its in the uAh so two months of storage with the battery on/off button on on, would turn into mAh.

Another thing that crossed my mind was what would happen if I had used up the battery riding to LVC of the battery, kicking in the BMS cutoff of 44.8V, then storing the battery for an amount of time that would deplete the battery to say 40V. All questions grintech could ask for sure and will do, tyvm.

 

[john61ct]

I do remember reading about and I am thinking its in the uAh so two months of storage with the battery on/off button on on, would turn into mAh.

Amp hours, whether milli, micro whatever, are not units of current flow, but static quantity.

You need amps, whether milli or micro.

Say it burns at a 50 mA rate. That means 50mAh per hour, half an Ah per 10 hours, eight and a half Ah per week, etc.

_______
> cutoff of 44.8V, then storing the battery for an amount of time that would deplete the battery to say 40V.

Best to use per-cell voltages. Assuming a 14S pack, the 3.2V LVC is nowhere near damaging anything.

2.86V as well, but certainly getting down into risky territory, best to do whatever it takes to prevent that happening anymore.

For best lifespan, average DoD should stay well over 3.5, even 3.7V might for example buy an extra hundred cycles - but all WAGs impossible to quantify.