Cars Only with These Technologies will be Called Technology Leaders in 2020
Lead
As for the battery pack as
a whole, there are two ways, physical and chemical, to optimize its overall
performance. Physical means refers to the optimization of the internal space
layout of the battery pack through various engineering optimizations, and Space
is reserved for the battery. Chemical means refers to finding a more
advantageous battery solution by adjusting the proportion and principle of
chemical substances in the battery.
The battery is
the most important part of a pure electric vehicle. Whether it is volume or
price, it can perfectly prove this.
Therefore,
whether you want to make electric vehicles more powerful or if you want to make
them cheaper, you need continuous innovation in battery technology.
As for the
battery pack as a whole, there are two ways, physical and chemical, to optimize
its overall performance. Physical means refers to the optimization of the
internal space layout of the battery pack through various engineering
optimizations, and Space is reserved for the battery. Chemical means refers to
finding a more advantageous battery solution by adjusting the proportion and
principle of chemical substances in the battery.
Of course,
everyone has been "deceived" many times over the years by various
battery news that is worrying about practicality. This time we will focus on
talking about plans that can be used commercially this year.
CTP Technology
At the Frankfurt
Auto Show in 2019, CATL released its own CTP technology. CTP is actually an
abbreviation for Cell to Pack. As the name implies, it has changed the
principle of the layout of the battery of passenger cars.
Prior to this,
all passenger car batteries basically had a triple structure. The first layer
was a cell, which is also the smallest component unit produced by a battery
manufacturer. The second layer was a module. Packaged in groups according to a
certain specification, it becomes a module. The third layer is the battery pack
(Pack), which is a large battery that is directly installed on the vehicle.
The reason for
the intermediate layer of modules was to facilitate transportation and
maintenance on the one hand. When the vehicle encounters a problem, there is no
need to replace it as a whole. It is only necessary to replace the defective
module. On the other hand, it is for safety. , More reinforcement ribs can be
arranged between the modules, to give the cell an extra layer of protection.
However, with
the advancement of vehicle engineering design, people also realize that such a
multilayer structure is to a certain extent redundant in design. Through the
integrated design with the vehicle body, the module layer can be directly
removed without removing the module layer. The battery cell layout is in the
battery pack, but it does not affect the technical indicators of the entire
vehicle. This is CTP.
The benefits of
CTP can be divided into three aspects. One is the capacity. In addition to
reducing the module shell and various additional wiring, a battery pack of the
same volume can provide 15-20% more volume to hold the discharge cell. It is
reliability. After removing unnecessary components, the overall number of parts
can be reduced by 40%. Third, it is cheap. After eliminating multiple
processes, the manufacturing cost can be much lower.
Of course, this technology
also requires car manufacturers to have a closer relationship with battery
factories during the research and development stage, in order to develop
battery modules in a deeper and more reasonable way. Vehicles equipped with CTP
batteries should be seen by the end of 2020Q1.
Blade Battery Technology
The blade
battery is a technology that BYD recently proposed on the Han EV, but it is
certain that this technology will become the standard for BYD pure electric
vehicles in the next few years.
Benefiting from
the advantages of integrated battery and vehicle production, BYD can customize
the shape of the battery at a deeper level of the vehicle design. The latest
blade battery is morphologically based on the current thickness of the
approximately rectangular cells in a controlled thickness. Next, a larger
extension was made in length, so that the battery looks thin and long, similar
to the shape of a blade.
Broadly
speaking, the application of blade batteries in electric vehicles can also be
analogized to a special case of CTP technology. According to materials
announced by BYD, after such structural upgrades, the energy density of BYD's Lithium
Iron Phosphate batteries can be increased more than 30% comparing to the
previous battery system. It saves a lot of material as well as labor costs. The
overall cost of the battery can be reduced by 30% compared to the traditional
ternary battery of the same specifications.
In addition, the
blade battery has a larger single chip area, and by adding a heat dissipation
pipeline in the middle, it also helps to better improve battery heat
dissipation.
In addition, BYD
also revealed more battery parameters of the Han EV. The battery pack voltage
of the Han EV has reached 570V, and most mid-range electric vehicles on the
market also use a 400V body structure. The 800V architecture is used by the
ultra-luxury car, such as Taycan Porsche. It means that the Han EV using blade
batteries can not only conduct energy more efficiently, but also allow the
battery pack to have better charging power.
According to the rhythm
that Han EV intends to release at the Beijing Auto Show, we can see the related
technology of blade batteries in Q2 this year.
Dry Electrode Technology
When it comes to
passenger car battery technology, Tesla cannot be bypassed. Due to the rapid
increase in production and sales in recent years, Tesla has become the single
car company with the largest lithium battery capacity in the world.
Among the
currently available models, Tesla also holds two records, the highest energy
density battery pack in the industry and the lowest unit cell cost per unit
capacity.
So far Tesla has
insisted on using a cylindrical battery structure so that Tesla has paid more
attention to the performance optimization of the cell body. Prior to this,
Tesla acquired the battery technology developer Maxwell, which has always
adhered to the dry electrode technology. It is also expected to be commercially
available in 2020.
Traditional cell
electrode manufacturing requires the use of a liquid adhesive, and then it needs
to wait for being dry before performing other processes, which is tedious and
time consuming. Dry electrodes refer to the solid powder without the use of
these types of industrial volume during the manufacturing process. The material
is made in the form of smearing and pasting.
The introduction
of Maxwell pointed out that after the use of dry electrode technology, the
energy density of automotive lithium batteries is expected to increase by 10%
and the manufacturing cost is reduced by 10%. Although it seems that this
technology is not as large as the first two improvements, it is important that
It starts from a higher standard than other batteries.
Tesla will host a battery
day event in April, when more detailed introductions of this technology will
appear, so the technology is expected to be commercially available before the
end of this year.
Original Link: https://mp.weixin.qq.com/s/ONEYVUyylC7r7cTBtYyK_w
