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Dr-Gigavolt / dbus-aggregate-batteries

Virtual service to merge multiple serial batteries
MIT License
66 stars 11 forks source link

Quick Question Using smart shunt #63

Closed Sarah-1331 closed 6 months ago

Sarah-1331 commented 8 months ago

its been a while since i set up my rpi with venus os and my JBD bms

so i appoligise for the noob question

can i use this to display just the current of a smart shunt and the rest of the battery details from my bms? as my bms seems ok for SOC and the cell voltages etc but the current not been accurate kills me like the first 12watts doesnt register..

thanks again

Dr-Gigavolt commented 8 months ago

The driver is not intended to measure the entire battery current by smart shunt because it would be wasting of the smart shunt. Either by BMSes or as a sum of all chargers and inverters. A smart shunt is intended for DC consumption only. If your BMSes count the the SoC correctly, it is not possible that the current is not precise. SoC(t) = 100% q(t)/Q(full); q(t) = integral{ i(t)dt }

Dr-Gigavolt commented 8 months ago

The first 12W seem to be negligible.