New energy business
Compared with aluminum battery packs, steel battery packs have
obvious advantages in terms of cost, strength, connection, fire
resistance, scrap rate, and carbon emissions. Through the
application of advanced materials and processes, it is possible to
achieve a weight close to that of aluminum battery packs, but
currently limited by subsidy policies, the market share of aluminum
battery packs is nearly 90%.
Typical case of module production line
| the beat | 255 JPH (20秒) |
| Equipment operating rate | 85% |
| Automatic station | 20 |
| manual work station | 2 |
| Number of robots | 12 |
| laser welding | 6000W |
| CCD | 3 |
| type reserved | 4 |
Typical case of Pack production line
| the beat | 12 JPH |
| Equipment operating rate | 85% |
| Automatic station | 6 |
| manual work station | 12 |
| Number of robots | 37 |
| CCD | 18 |
| type reserved | 3 |
5. Lithium iron battery
The full name of the lithium-iron battery is lithium iron phosphate
lithium-ion battery. Because its performance is especially suitable
for power-facing applications, it is also called "lithium-iron
power battery".
The lithium-iron battery uses LiFePO4 as the positive electrode,
which is connected to the positive electrode by an aluminum foil,
with a polymer separator in the middle, which separates the
positive electrode from the negative electrode, but lithium ions
can pass through but electrons cannot. Carbon (graphite) is used as
the negative electrode, which is connected to the negative
electrode of the battery by aluminum foil.
Lithium-iron batteries have the following characteristics:
1. Good performance at high temperature (can withstand high
temperature of 160°C);
2. Even if the battery is damaged externally or internally, the
battery will not burn or explode, and the safety is the best;
3. Excellent cycle life, after 500 cycles, its discharge capacity
is still greater than 95%;
4. Over-discharge to 0V without damage;
5. Can be charged quickly;
6. Low cost;
7. No pollution to the environment.
From the experience of R&D and production of lithium-ion
batteries, Japan is the first country to commercialize lithium-ion
batteries, and has always occupied the high-end lithium-ion battery
market. Although the United States is leading in some basic
research, so far there is no large-scale lithium-ion battery
manufacturer.
Therefore, it is more reasonable for Japan to choose modified
lithium manganese oxide as the positive electrode material for
power lithium-ion batteries. Even in the United States,
manufacturers using lithium iron phosphate and lithium manganate as
cathode materials for power lithium-ion batteries account for half
and half, and the federal government also supports the research and
development of these two systems.
In view of the above-mentioned problems of lithium iron phosphate,
it is difficult to be widely used as a positive electrode material
for power lithium-ion batteries in new energy vehicles and other
fields. If the problems of high-temperature cycling and poor
storage performance of lithium manganate can be solved, it will
have great potential for application in power lithium-ion batteries
by virtue of its advantages of low cost and high rate performance.
