bkvszomorito wrote:My car has 30kWh pack, with 40kWh pack modules. Those modules are from scrapyard, from a vehicle with very low mileage, and perfect SOH. Currently I can drive only 220km with the pack, and it can store approximately 27kWh according to LEAFSpy. This seems to mean, that the 30kWh BMS is limiting the capacity. The pack voltage is 332V around 0% SOC (turtle mode on), and it is 397V when the pack is fully charged. The strange thing is, that the SOH value according to LEAFSpy is 90%, and the Hx is 74%. This means, that the chemistry and the internal resistance is different in case of the 30 and the 40kWh modules.
Do you have any idea, how to get the full capacity of the 40kWh modules? The 40kWh BMS is not compatible with the VCM of the 30kWh car, so it cannot be mounted directly. With this setup, the real SOH (not the calculated one by 30kWh BMS) of the 40kWh should last quite "forever", but it would be nice, to have more range out of the pack.
As I saw, the 40kWh pack with the original BMS should be around 405V with 100% SOC, so there might be the "missing" capacity, but the 30kWh BMS is limiting the voltage around 397Volts, so charging further is not possible.
Any help, to find a solution is appreciated!
Don't quote me but it seems with others, you simply need a wholesale switch over of the LBC, BMS to make it work. So getting more range will be spendy or you could simply use as is and have a 30 kwh pack that will take years, maybe decades before it starts showing any degradation.
What gets me is your 332 volts to turtle? That is far far far above any previous LEAF pack of any size?
Remember the LBC math error that was forcing the BMS to report false degradation which led it to restrict full usage of the pack? Sounds like you got the same thing going on there.
2011 SL; 44,598 mi, 87% SOH. 2013 S; 44,840 mi, 91% SOH. 2016 S30; 29,413 mi, 99% SOH. 2018 S; 25,185 mi, SOH 92.23%. 2019 S Plus; 13,705 mi, 93.41% SOH
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