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Post by rusdy on May 7, 2019 19:02:15 GMT 11
Not trying to discourage more, but simply adding FYI: In my opinion, the degraded 'Hx' causes me more grief, more than degraded battery capacity. Here in WA (Wait A-while), we have pretty good coverage of fast chargers. So, degraded range is lesser an issue. However, what I've just found out, degraded Hx (mine is pretty bad) slows down fast charging time more than doubled! Yikes!! Some snapshot: More in-depth geeky details here.
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Post by dac1811 on May 7, 2019 19:53:38 GMT 11
Your SOC doesn't seem to agree with the cell voltages. With av of ~ 4.09v I would expect a SOC somewhere near 80%. My LeafSpy shows a SOC of 71.9% with cell voltages around 3.99. My SOH is 72 and Hx is 50.2 . Weird.... DAC
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Post by rusdy on May 8, 2019 11:16:01 GMT 11
Hi DAC, the screenshots were taken during fast charging session. The 'rest' voltage will definitely lower than that. What took me by surprise, how early it went to 4.1V during fast charging. As per the arrow on the left screenshot, as early 45%. And then dived down exponentially. New batteries usually starts to slow down (I.e. reaches 4.1 V) much much later at 80% or above, which enable fast charging at 50kW easy all way to 'full' Note: After quick googling, looks like other factor on top of internal resistance may play parts. Me still researching (not that will help )...
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