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Usually “calibrating” is confirming the starting point for the Coulomb-counting method of determining SOC. If you don’t get into the extreme low or high <20%/>80% the voltage is essentially the same so you don’t really know if you are 50% or 65% SOC as an example as your starting assumption may be out of whack.
Active balancing means charging/keeping the cell voltage at 4.20V but draining the high cells, like any better home charger for hobby toys.Cell balancing is different and is bleeding off the high voltage cells (relatively) to align with the lowest voltage cell. Charge for a bit, then rinse and repeat. This is a lot of the reason charging >80% takes much longer as they have to make sure not to overshoot, rebalance, charge, rebalance…
It was a good video.
Or, conceivably, there could be fewer LFP batteries, or they could be newer and not yet to the point of failures. To answer this question, more data is needed. We need a failure rate, adjusted for age, I would say.If you’re curious, try finding posts here and on Reddit about Teslas with NCA or NCM batteries dying and needing replacement. One person already posted an example in this thread, and you can usually find multiple example posts per week, even from new Teslas that are less than a year old. After that, try to find posts about Teslas with LFP batteries dying. It’s almost impossible. Pretty sure a massive pro for LFP batteries, at least the ones Tesla uses, is reliability. Part of the reason could be not so much the chemistry itself, but the more modern and much more simple pack design that evrepair mentioned.
Or, conceivably, there could be fewer LFP batteries, or they could be newer and not yet to the point of failures. To answer this question, more data is needed. We need a failure rate, adjusted for age, I would say.
I have seen countless posts about NCA / NCM batteries that are less than 3 years old (and even less than 1 year old) dying.
Its definitely the chemistry. LFP is way more stable and can handle way more cycles then NMC/NCA.If you’re curious, try finding posts here and on Reddit about Teslas with NCA or NCM batteries dying and needing replacement. One person already posted an example in this thread, and you can usually find multiple example posts per week, even from new Teslas that are less than a year old. After that, try to find posts about Teslas with LFP batteries dying. It’s almost impossible. Pretty sure a massive pro for LFP batteries, at least the ones Tesla uses, is reliability. Part of the reason could be not so much the chemistry itself, but the more modern and much more simple pack design that evrepair mentioned.