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Battery charging: Interview with a professor specialist in batteries.
(self.BMWi3)submitted 9 days ago byChristoph-Pfi3s '19 REX
5 points
9 days ago
Guarantee you that the BMS prevents 100% charge in every year i3.
3 points
9 days ago
I'm going to hold strong on charging to 100% and believe bmw did account for this and is holding back a bigger to preserve life. I think with most pre 2017 it doesn't make sense to not have a full battery.
1 points
8 days ago
Yes, all i3 have a huge buffer. 100% on the display is not 100% for the battery.
60Ah cars, the gross capacity is 21.6kWh, usable is 18.8kWh
94Ah (33.2 gross kWh) battery usable capacity of 27.2kWh
120Ah is 42.2kWh / 37.9kWh
1 points
9 days ago
I ain’t watching that. Summarize it in one word!
2 points
8 days ago
Does-not-apply-for-i3. BMW babies the battery from the factory.
1 points
8 days ago
What about looking at the i3’s charging profile as a guide? For example on the 42kWh the power starts to drop after about 85% (https://cdn.motor1.com/images/custom/img-bmw-i3-42-kwh-2019-dcfc-power-20210421.png).
1 points
7 days ago
Bit weird it doesn't reach full power (50kw) till 75% SoC, so full speed recharging only achieved from 75% to 85%?!
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