Battery Degradation/Range Loss

[viet658]

Interesting article on battery degradation. Looks like battery degradation is pretty slow after the initial years/miles. 6% for the first 50,000 miles and then 1% every 30,000 after.

Tesla Model S Battery Life: How Much Range Loss For Electric Car Over Time?

Plug In America

 

[Gizmotoy]

Good stuff. I'm at about 3% loss at 10k miles, but I'm not sure if that's a balancing issue or normal.

Strangely, they guess 92% capacity at 100k miles, but their most representative sample (the car with the highest miles) had 94% at 52k. That's kind of unusual, given that range loss is due to both usage and time. That is to say, all things equal, a 4 year old vehicle with X miles should have less range than the same vehicle with X miles at 1 year old. I wonder what factored in to that discrepancy?

Tom Saxton had some nice visuals for his data at TMC Connect... would have been nice to see something similar here.

 

[viet658]

Actually they mention one vehicle from the Plug in America study (Second Link) which had about 92,000 miles and still about 92% of capacity.

Good stuff. I'm at about 3% loss at 10k miles, but I'm not sure if that's a balancing issue or normal.

Strangely, they guess 92% capacity at 100k miles, but their most representative sample (the car with the highest miles) had 94% at 52k. That's kind of unusual, given that range loss is due to both usage and time. That is to say, all things equal, a 4 year old vehicle with X miles should have less range than the same vehicle with X miles at 1 year old. I wonder what factored in to that discrepancy?

Tom Saxton had some nice visuals for his data at TMC Connect... would have been nice to see something similar here.

 

[Gizmotoy]

Actually they mention one vehicle from the Plug in America study (Second Link) which had about 92,000 miles and still about 92% of capacity.

Missed that somehow. Thanks for the clarification. So the explanation for the discrepancy is that they consider it an outlier.