Last year, Xiaomi announced 200W power fast charging technology, and it only takes 8 minutes to fully charge a 4000mAh battery.
The fact is that not only in the field of mobile phones, but also in the field of power batteries, fast charging is also one of the important directions of market attention.
Generally
speaking, most electric vehicles use ordinary charging technology. This
ordinary charging method takes 8-10 hours to charge the electric car,
while fast charging is fast charging. It only takes 1 hour to fully
charge the battery. .
To
simplify the concept, in fact, fast charging uses high-current and
high-power direct current to charge the battery. The real principle is
that in the fast charging state, the lithium ions in the lithium battery
move at high speed and are instantly embedded in the two poles of the
battery.
The method of realization is, first, use a wide charging pulse to charge the battery to increase the terminal voltage of the lithium battery.
When the charging time limit set by the charging system is reached, the
charging system cuts off the supply current to stop charging the
battery, and then when the interval reaches At another charging point,
restart the charging, and repeat this process. When all the lithium ions
inside the battery gather to the positive and negative electrodes of
the battery, the battery will be fully charged quickly.
This
fast charging technology has high requirements on the battery itself.
The battery itself must have an automatic management system, and at the
same time, it must have very reliable thermal stability and withstand
high voltage and high current.
The
above are the battery requirements for fast charging. In order to
achieve this fast charging, there must be a matching charging system.
Now many cities provide fast charging charging piles with a power of up
to 20KW and above, which can convert 10KV high-voltage alternating
current. Hundreds of amps of direct current are continuously delivered
to the car battery system through a dedicated cable.
In
view of the fact that the current battery pack equalization technology,
power transmission and distribution technology, especially heat
dissipation technology has not yet met the requirements, fast charging
in the true sense cannot be fully realized. Compared with ordinary
charging technology, the charging time has been greatly shortened. The
important thing is this kind of fast charging technology. It can be seen
from the principle that fast charging will not seriously damage the
battery and sacrifice the service life of the battery as rumored.
BENZO Energy Technology Co.,Ltd
UFine Technology Co., Ltd
Site: www.bz-battery.com / www.benzoenergy.com
Comments
Post a Comment