ldallan
Well-known member
I'm wondering if there are objective values to quantify "best battery friendly practices" contrasted to "battery unfriendly practices"?
I've seen plenty of posts mentioning "do this ... don't do that" to baby our batteries so they degrade slower, but I'm fuzzy on how much it matters. How "costly" is it to use DCFC fast charging in terms of battery degradation? How "costly" is it to charge to 100% rather than the recommended 80%?
For example for purposes of discussion, suppose our batteries with lithium-manganese-oxide with nickel oxide (LiMn2O4 with LiNiO2) chemistry would go 120,000 miles at 12,000 miles per year (10 years) with a range degradation to 60% by using "best practices" in an ideal environment:
* always use Level-2 6.6 kWh charging (220v - 240v) going from 20% to 80%
* never use DCFC (DC fast charging)
* never allow battery SOC to go under 20% (don't drain to LBW low battery warning or VLBW very low battery warning or "Turtle" or 0%)
* mild temperature like San Francisco or Ireland that don't get all that cold or that hot (mostly between 40°F to 80°F)
Contrasting to the above "best practices" to "non-optimal practices" that I've read on this and other forums:
* charging to 100%
* using DCFC fast charging
* freeway speeds in high heat like Texas or Arizona summers
* draining battery down to LBW, VLBW, or Turtle
Or perhaps using another quantifiable measure of battery longevity:
My limited understanding is that the Li-Ion chemistry used in our Leafs is rated for 300 to 500 full discharge/recharge cycles. About how many charges does it "cost" in terms of fewer lifetime recharges for using DCFC fast charging? Level-2 charging to 100%? Operating the vehicle in extreme Texas or Arizona heat at freeway speeds?
I've seen plenty of posts mentioning "do this ... don't do that" to baby our batteries so they degrade slower, but I'm fuzzy on how much it matters. How "costly" is it to use DCFC fast charging in terms of battery degradation? How "costly" is it to charge to 100% rather than the recommended 80%?
For example for purposes of discussion, suppose our batteries with lithium-manganese-oxide with nickel oxide (LiMn2O4 with LiNiO2) chemistry would go 120,000 miles at 12,000 miles per year (10 years) with a range degradation to 60% by using "best practices" in an ideal environment:
* always use Level-2 6.6 kWh charging (220v - 240v) going from 20% to 80%
* never use DCFC (DC fast charging)
* never allow battery SOC to go under 20% (don't drain to LBW low battery warning or VLBW very low battery warning or "Turtle" or 0%)
* mild temperature like San Francisco or Ireland that don't get all that cold or that hot (mostly between 40°F to 80°F)
Contrasting to the above "best practices" to "non-optimal practices" that I've read on this and other forums:
* charging to 100%
* using DCFC fast charging
* freeway speeds in high heat like Texas or Arizona summers
* draining battery down to LBW, VLBW, or Turtle
Or perhaps using another quantifiable measure of battery longevity:
My limited understanding is that the Li-Ion chemistry used in our Leafs is rated for 300 to 500 full discharge/recharge cycles. About how many charges does it "cost" in terms of fewer lifetime recharges for using DCFC fast charging? Level-2 charging to 100%? Operating the vehicle in extreme Texas or Arizona heat at freeway speeds?