lithium ion battery pack Nissan Leaf 30-kwh battery decline 3 times that of earlier electric cars: study

At least for now, Nissan Leaf is still the highest --
Historically, more than 300,000 electric vehicles were sold.
One of the measures to keep costs down is to use passive air cooling for battery packs, rather than expensive liquid cooling that other manufacturers use to keep battery temperatures within the limits.
Nissan has changed the chemical composition of the battery once, changing the chemical composition of the battery in 2015
Cells known as "Lizard cells" are said to be more resistant to degradation caused by very high temperatures.
Don't miss it: 2016 Nissan Leaf offers 107-
30 miles
The second year of the KWh battery (September 2015), in 2016, Nissan provided a higher-
The capacity battery pack in the blade, lifting its size from 24 KW-
Hours to 30 KW hours and increase its EPA-
Rated from 84 miles to 107 miles.
Now, a new study of 283 leaf cells, including 82 larger leaf cells
Volume Pack, seems to indicate higher cell rate
30-capacity loss after upgrade
The Kwh battery pack is 24-kwh batteries.
The paper "acceleration report battery capacity loss for Nissan Leaf 30 KW-hour variant" was published in March 15.
No peers-reviewed.
The key sentence to summarize their findings is: at the age of two, the average drop rate of the leaf [battery health] at 30 KW was 9.
9% (95% uncertainty range 8. 7% to 111 percent; n = 82).
This is about three times the rate of leaf drop at 24 KW, with an average drop of 3 in two years.
1% years (95% uncertainty interval 2. 9 percent to 3. 3 percent; n = 201).
Read this article: The new life of the old Nissan Leaf electric vehicle: battery replacement and many of its precautions can be applied to this study: the number of cars is small, the cells used for these two abilities may have different but known degradation curves and it is not clear whether the two cars are subject to the same driving conditions.
It is worth reading comments after the executive summary of the study that raise questions about the methodology and the interpretation of the results of the study.
The researchers responded to every question, detailing what they knew, how they simulated battery life, and looking at what might be productive in more detail.
Nevertheless, the early data are likely to be of concern to owners of at least 2016 and 2017 leaves.
The study did not include any data from the redesigned 2018 Nissan Leaf, which was only sold last fall, with further upgrades to battery capacity, from 30 degrees for models 2016 and 2017 to 40 degrees.
The green car report contacted Nissan North America to comment on the study and received the following statement from its electric vehicle communications manager, Jeff Vandel.
Check out: how to negotiate the new Nissan Leaf battery pack: Electric-
The owner suggested that "Nissan is aware that a limited number of customers are 30-
"Kwh battery," he wrote.
"Leaf owners is one of our most loyal customers.
"We take their concerns seriously and there are currently technical experts investigating the issues raised.