来源：https://goo.gl/En63LE
Tesla battery degradation at less than 10% after over 160,000 miles,
according to latest data
根据最新数据显示，Tesla 电池在超过 160,000 英里之后衰退不到10％
Battery degradation is one of the biggest concerns for electric car owners
and potential buyers, but data from Tesla battery packs have been very
reassuring so far.
电动车车主跟潜在买家最担心的问题之一是电池退化，但是迄今为止，Tesla 电池组的
数据非常令人放心。
Now the latest data shows less than 10% degradation of the energy capacity
after over 160,000 miles on Tesla’s battery packs.
现在最新数据显示，在开了超过 160,000 英里后，Tesla 电池组电量下降不到10％
A group of Tesla owners on the Dutch-Belgium Tesla Forum are gathering data
from over 350 Tesla vehicles across the world and frequently updating it in a
public Google file.
荷兰-比利时 Tesla 论坛上的一群 Tesla 车主正在收集世界各地350多辆 Tesla 的数据，
并经常在公共Google文件中更新它。
We have previously reported on the data, but they have since added many more
vehicles and those vehicles have been driving a lot more – completing more
battery cycles.
The data clearly shows that for the first 50,000 miles (100,000 km), most
Tesla battery packs will lose about 5% of their capacity, but after the
50,000-mile mark, the capacity levels off and it looks like it could be
difficult to make a pack degrade by another 5%.
数据清楚地表明，在第一个 50,000 英里（100,000公里）后，大多数 Tesla 电池组
容量将会减少约5％，但是过了 50,000 英里后，电量要再衰减另一个5%看起来相当困难
The trend line currently suggests that the average battery pack could cycle
through over 300,000 km (186,000) before coming close to 90% capacity.
目前的趋势线表明，电池组在接近 90％ 的容量之前，平均可以超过 300,000公里
Here are the relevant charts from the data gathering effort (full chart on
the left and zoomed to 80% on the right):
以下是相关数据的图表（上方完整图表，下方把范围缩减至80％-100％）：
https://i.imgur.com/N1B917a.jpg
https://i.imgur.com/o0mSfwl.jpg
Screen Shot 2018-04-14 at 2.56.15 PM Screen Shot 2018-04-14 at 2.54.02 PM
There are a few outlier battery packs out there and they tried to figure out
why by gathering other data, like frequency of DC fast-charging and daily
state of charge, but there’s no clear indication that any of those factors
have any significant impact based on their data.
有几个离群值电池组在那里，他们也通过蒐集其他数据试图找出为什么，
例如使用直流快充的频率、每日充电状态，但没有明确证据指出这些因素中
的任何一个会因其而对电池组容量产生重大影响。
With this said, Jeff Dahn, a renowned battery researcher and the leader of
Tesla’s research partnership through his battery-research group at Dalhousie
University, said that he recommends charging to only 70% daily in order to
extend battery life.
著名的电池研究人员，Tesla在 Dalhousie 大学电池研究小组的领导人，Jeff Dahn表示，
建议每天仅充电到70％以延长电池寿命。
Tesla warns that it does not cover battery degradation from “battery usage”
under its Model S and Model X warranty up to any specific level:
特斯拉警告说，Model S/X 的电池保固并不涵盖电池退化到任何特定等级：
“The Battery, like all lithium-ion batteries, will experience gradual energy
or power loss with time and use. Loss of Battery energy or power over time or
due to or resulting from Battery usage, is NOT covered under this Battery
Limited Warranty. See your owner documentation for important information on
how to maximize the life and capacity of the Battery.”
"与所有锂离子电池一样，电池随着时间和使用将会经历逐渐的电量或功率损耗。
本电池有限保修范围不包含电池电量或功率因随时间或由于电池使用而产生的电量损失。
有关如何最大限度地延长电池寿命和容量的重要信息，请参阅您的车主文件。"
But for the Model 3, Tesla introduced a warranty with a new 70% battery
capacity retention guarantee.
但对于Model 3，Tesla 推出了新的70％电池容量保证保固。
The Model 3 is equipped with different battery cells and a new battery pack
architecture, but if data from the Model S is any indication, it shouldn’t
be an issue.
Electrek’s Take
Battery degradation is often a big concern for new electric vehicle buyers.
To a certain degree, the Nissan Leaf might be to blame since it had a lot of
issues in that regard, which is why Nissan has a much more comprehensive
battery capacity warranty now.
新电动车买家常常担心电池退化问题。
在某种程度上，Nissan Leaf 可能会被抱怨，因为它在这方面有很多问题，
这就是为什么 Nissan 现在拥有更全面的电池容量保证。
A recent study shows that with the original 24 kWh pack loses about 20% of
their capacity over 5 years and Nissan’s more recent 30 kWh battery pack
loses capacity more quickly than the older pack:
最近的一项研究表明，Leaf 最早的 24kWh 电池组在5年内损失了其容量的20％，
而 Nissan 最近的 30kWh 电池组的容量比旧电池组的容量损失更快：
https://i.imgur.com/8r4Bm4e.jpg
But Tesla’s vehicles arguably have a much more advanced battery thermal
management system than the Leaf and data from early Model S vehicles has been
really encouraging as we can see above.
但是 Tesla 的车辆拥有比 Leaf 更先进的电池热管理系统，
而早期 Model S 的数据确实令人感到鼓舞，正如我们上面所看到的。
As for anecdotal data, my own Model S, which is one of the first 2,000
vehicles ever made, only lost about 6% capacity over 5 years.
而我自己的 Model S 是最早期的头两千辆车之一，5年多仅仅损失了6％的容量。
CEO Elon Musk has been hyping even more potential for Tesla battery pack by
once referring to a battery pack that Tesla was testing in the lab. He said
that the company had simulated over 500,000 miles on it by repeatedly cycling
it and that it was still operating at over 80% of its original capacity. At
that point, the car itself is more likely to give up than the battery pack at
this kind of mileage.
Tesla CEO Elon Musk 在一次访谈中曾经提到过在实验室测试中的 Tesla 电池组的潜力。
他表示，该公司通过反复循环模拟了超过50万英里的行驶里程，电池组仍以超过原始电量
80％运作。就这点来看，到了这种里程汽车本身比电池组更有可能被丢弃。
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之前在板上也有发过相关新闻的文章：
文章代码(AID): #1O6BXAyL (car)
文章网址: https://www.ptt.cc/bbs/car/M.1478015050.A.F15.html
文章代码(AID): #1Oy2wH0g (car)
文章网址: https://www.ptt.cc/bbs/car/M.1492135569.A.02A.html
这篇新闻可以算是之前的数据更新
蒐集的车辆数据也更多
也有 Nissan Leaf 的电池组资料
虽然 Leaf 的电池组比较小，所以衰退会更明显是必然的，但没想到差距有点大
尤其是更旧更小的 24kWh 电池组表现反而要比更新更大的 30kWh 电池组要来的好的多
这点让人感觉到有些疑问
是换了电池供应商吗？