3 ms·
Haven't they switched to coulomb counting? No need to infer state of charge from voltage alone.
by nimish 3y ago
Haven't they switched to coulomb counting? No need to infer state of charge from voltage alone.
- Kirby64 3y agoCoulomb counting has issues with accumulated error in any system. LFPs just make things worse. Consider that if the counting is off by only 0.1%, then if you only use coulomb counting to determine state of charge, you will accumulate a 10% error after only 50 charge and discharge cycles. Voltage based readings to "reset" or calibrate the maximum/minimum set points are extremely important. For LFP batteries, they need to be very close to the 100% state of charge to accurately measure. Regular lithium ion can be measured at much lower states or charge (70-90% usually, to my knowledge).