3 tons wrote:
“ But a cheap coulomb counter is fine with me because it's an inherently unnecessary device.”
Ok, but for clarity it should be noted here that a meter that only counts coulombs is not structly compatible with LFP, though it may be fine above 50% SOC - in practical terms with LFP, SOC only begins to get important below 50%...
As has been already noted here several times, computing SOC with LFP requires a sophisticated algorithm including a ‘look-up’ ledger which is necessary when below a 50% SOC...This is due to the extremely flat voltage curve characteristics of LFP, and why (as previously stated) I had to ditch my former meter...
This is interesting. There are a lot of people using the AiLi for their LFPs over at diysolarforum.com and I've never heard this before. I'll go ask the gurus over there and see if I can get some clarity. I've been using it for almost a year now and it has usually agreed with the BMS on SOC.
Edit: To be clear, a Coulomb counter does not rely on voltage.
