来源：https://goo.gl/4QBQzH
GM VERSUS TESLA: BOLT EV AND MODEL 3 BATTERY PACKS COMPARED
It turns out the Chevrolet Bolt EV battery pack is simpler to assemble than
that of the Tesla Model 3, while the Tesla pack is more energy dense by
weight.
Bolt EV 电池组比 Model 3 更容易组装，而 Tesla 电池组的能量重量比更高。
We had an excellent video here recently on InsideEVs: “Watch Chevy Bolt
Battery Reassembly.” I was impressed with the ease that the Bolt EV battery
pack went together. John Kelly was very thorough, even measuring the weight
of two of the Bolt EV modules so we can compare those with Tesla’s battery
weight as well.
我们做了一部很棒(很长)的影片放在 InsideEVs 上。
Watch Chevy Bolt Battery Reassembly:(很长，约113分钟)
https://youtu.be/ZBzRKglr95U
Bolt EV 电池组组装的容易程度令人印象深刻，John Kelly 做的工作非常的彻底，
所以我们可以测量两个 Bolt EV 模块的重量，并且拿来与 Tesla 比较。
Conclusion:
GM’s pack is simpler to assemble in this author’s opinion. However, as
expected, Tesla has the edge in the energy density department.
结论：
GM 的组装更为简单。然而，正如预期的那样，Tesla 在能源密度方面处于领先地位。
First, a little background on how these two packs cool their cells. Tesla’s
method involves running a ribbon-shaped cooling tube between the cells. They
have kept this technique since the Model S and are still using it in Model 3.
https://i.imgur.com/CFYxeUr.jpg
https://i.imgur.com/MLwX1pY.jpg
首先，介绍这两种电池组如何冷却电池。 Tesla 的方法是在电池之间围绕带状冷却管。
自 Model S 以来，他们一直使用这种技术，并仍在 Model 3 中使用它。
Tesla has attempted to automate the assembly of the Model 3 battery pack and,
unlike Model S, they are now attaching the individual cells to the cooling
ribbon. This procedure is described in more detail in our article: Tesla
battery pack modules made like a machine gun. It also appears likely that
Tesla is attaching the cells to the cooling ribbon with glue.
Tesla 试图自动化 Model 3 电池组的组装，并且与 Model S 不同，
他们现在将单个电池连接到冷却带上。
这个过程在我们的文章中有更详细的描述：像机枪一样制造的 Tesla 电池组模块。
(文章连结：https://goo.gl/8euctD )
Tesla 似乎也可能用胶水将电池连接到冷却带上。
Obviously, the whole process is difficult as Tesla has twice delayed the
promised “5,000 Model 3’s per week” production bogey.
显然，整个过程是很困难，
因为 Tesla 已经两次推迟了承诺的“每周5000个 Model 3”的生产目标。
The Bolt EV pack is much simpler. The individual prismatic cells simply sit
on a cooling plate with a thermal mat between the cells and the plate.
Bolt EV 电池组简单多了。
个别方型电池就只是放置在电池和电池板之间的冷却板上。
Below is a great screenshot from the video showing the plate.
https://i.imgur.com/jQNKhRq.jpg
Next is a screenshot of Professor Kelly lowering section 5 modules in place.
接下来是 Kelly 教授放下第5部分模块的截图。
https://i.imgur.com/3t5d2ky.jpg
Pretty simple and easy to assemble.
非常简单和容易组装。
.…and another screenshot showing the cooling plate.
https://i.imgur.com/ZczaWQt.jpg
散热板的截图：
https://i.imgur.com/Kt3zGRW.jpg
Energy Density
At the 41:57 mark in the video we have a screenshot (below) of Professor
Kelly weighing modules 1 and 10 just prior to setting them on the cooling
plate. We must subtract the weight of the holding fixture to get the total
weight of modules 1 and 10.
能量密度
模块1与10加起来的重量如图：
https://i.imgur.com/u5oF9vF.jpg
The Bolt EV has 10 modules: 8 with 30 cells each and 2 with 24 cells. Module
1 and 10 are the bigger modules with 30 cells. We also find 57 kWh of usable
energy in the Bolt EV pack thanks to some sleuthing by fellow engineer Jeff
Nisewanger in “ Jaguar and Chevy have LG in common.” This gives us 5.95 kWh
for one big Bolt EV module, which results in a module energy density of 11.9
#/kWh.
Bolt EV共有10个电池模块：其中八个有30个电池，另外两个有24个电池。
其中模块1与10是有30个电池的大模块。
我们还发现 Bolt EV 电池组中有 57 kWh 的可用能量，
这要归功于 Jeff 在"Jaguar and Chevy have LG in common." 所做的一些调查。
这让我们知道一个 Bolt EV 的大模块有 5.95 kWh的电量，
能量密度则为 11.9#/kWh。 (看不懂#是什么单位)
Tesla battery module weights are based on weights published in HSR Motors
online catalog (aka Jason Hughes). Usable energy per Jason Hughes is 98.4 kWh
for the P100D pack. There are 16 modules in that pack, so we can get the
energy density of 1 module of 10.7#/kWh. Energy density of Tesla Model 3
cells assumed equal to P100D cells. See “Tesla Model 3 2170 cells=same
energy desity as P100D 18650 cells”
Tesla 电池模块重量是基于 HSR Motors 在线目录（又名Jason Hughes）上发布的重量。
每个 P100D 电池组的可用能量为 98.4 kWh。
该电池组中有16个模块，因此我们可以得到一个模块有 10.7#/kWh的能量密度。
Tesla Model 3 电池的能量密度假定等于P100D电池。
参考：https://goo.gl/5ndf2P
Therefore, Tesla’s module is more energy dense by weight than the Bolt EV
module. Not a surprising finding.
因此，Tesla 模块的重量比 Bolt EV 模块的能量密度更高。这并不令人意外。
https://i.imgur.com/S4qQKl7.jpg
However, there is one caveat to all this. We have not included the weight of
the case in our calculations and Tesla’s case may be heavier than the Bolt
EV case. Why? Because Tesla’s battery chemistry is much more flammable than
GM’s and it requires more armor to deflect foreign objects.
然而有件事情必须说明。在这些计算中并没有包含外壳的重量，
Tesla的外壳可能比Bolt EV的外壳更重。为什么？
这是因为 Tesla 的电池化学性能比 GM 的更易燃，需要更多保护才能阻挡外界物体。
So, Tesla may not have as big an edge as these numbers indicate if we were to
include the cases in the calculations.
所以，Tesla 可能没有像这些数字表现出来的那样有那么大的优势。
Bolt的电池组这种散热方式没问题吗？
电池组中间的电池都没有接触到散热区域，这样有部分电池会衰退的比较快吧
有不少汽车厂还没上市的电动车也都是用这种方型电池而不是圆柱型电池
期待以后也会有类似的拆解来做比较
毕竟电池都是那几个大电池厂做的，同个电池厂来源相差不大
但电池组设计就考验到各家车厂的设计功力了