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Mixing(
配料
)
Mix solvent and bound separately with positive and negative active materials. Make into
positive and negative pasty materials after stirring at high speed till uniformity.
Coating
(涂布)
Now, we are in coating line. We use back reverse coating. This is the slurry-mixing tank. The
anode
(
Cathode
)
slurry is introduced to the coating header by pneumaticity from the mixing tank.
The slurry is coated uniformly on the copper foil, then the solvent is evaporated in this oven.
(下
面的依据情况而定)
There
are four
temperature
zones,
they
are
independently
controlled.
Zone one sets at 55 degree C, zone two sets at 65 degree C, zone three sets at 80 degree C,
zone four sets at 60 degree C. The speed of coating is 4 meters per minute.
You see the slurry is dried. The electrode is wound to be a big roll and put into the oven.
The time is more than 2 hours and temperature is set at 60 degree C.
Throughout the coating, we use micrometer to measure the electrode thickness per about
15 minutes. We do this in order to keep the best consistency of the electrode.
Vocabulary:
coating line
涂布车间
back reverse coating
辊涂
coating header
涂布机头
Al/copper foil
铝
/
铜箔
degree C
摄氏度
temperature zones
温区
wind to be a
(
big
)
roll
收卷
evenly/uniformly
均匀
oven
烘箱
evaporate
蒸发
electrode
极片
Cutting
Cut a roll of positive and negative sheet into smaller sheets according to battery specification and
punching request.
Pressing
Press the above positive and negative sheets till they become flat.
Punching
Punching sheets into electrodes according to battery specification,
Electrode
After coating we compress the electrode with this cylindering machine at about 7meters per
minute. Before compress we clean the electrode with vacuum and brush to eliminate any particles.
Then
the
compressed
electrode
is
wound
to
a
big
roll.
We
use
micrometer
to
measure
the
compressed
electrode
thickness
every
10
minutes.
After
compressing
we cut
the
web
into
large
pieces. We tape the cathode edge to prevent any possible internal short. The large electrode with
edge
taped
is
slit
into
smaller
pieces.
This
is
ultrasonic
process
that
aluminum
tabs
are
welded
onto cathodes using ultrasonic weld machine. We tape the weld section to prevent any possible
internal short. And finally, we clean the finished electrodes with vacuum and brush.
Vocabulary:
cylindering
柱形辊压
vacuum
真空
particle
颗粒
wound
旋紧卷绕
micrometer
千分尺
internal short
内部短路
slit
分切
ultrasonic
超声波
weld
焊接
Anode making
In anode making process, we cut the material into certain length strips. At the mean time, we
put a small piece of insulation tape to the tab in order to prevent any possible internal short. Then
the prepared nickel tab is riveted on anode and pat plain. We also tape the rivet section to prevent
any possible internal short. And finally, we clean the finished electrodes with vacuum and brush.
Jelly roll
This is Jelly roll, a manual winding process. In the course of Jelly roll, firstly, we place the
separator in between central pins, press the foot switch to turn central pins about 120 degrees.
Secondly, place the anode to the edge of central pins, and turn central pins about 180 degrees.
Lastly, place the cathode to the edge of central pins. During the winding process, we apply tension
by pressing the electrodes and the separator. We put the termination tape at the end.
After Jelly roll, we check the short circuit, then form the Jelly roll by pressing, so that it is
easier to insert the Jelly roll into the can.
Control points:
1. When winding to the end of the anode, covering the anode completely by the separator.
2. In the whole process, it is the most important points to ensure the best alignment among
the cathode, the anode and the separator for the Jelly roll. The separator has to cover the anode and
the cathode, and the anode has to cover the cathode completely. These points are mainly checked
before short checking.
Vocabulary:
Jelly roll
卷绕
Manual
手工的
Separator
隔膜纸
central pin
卷针
foot switch
脚踏开关
anode
负极片
cathode
正极片
termination tape
尾端胶纸
short circuit
短路
alignment
整齐
Taping & inserting
Put the tape on the two side of J/R, To prevent J/R being hurt in the insertion process.
Put a piece of tape between cathode tab and J/R .Because anode electrode is wider than
cathode electrode.
Put the bottom tape.
Insert the finished J/R into the can manually and then short circuit check by multi-meter.
Spot welding Ni tab to cap.
Ultrasonic welding the Al tab to cap using ultrasonic weld.
We have the second spot welding to ensure the best contact between the tab and cap.
Apply top insulator, to prevent Ni tab contacting with can.
Final J/R insertion by the centrifuge.
Cap positioning by hand. Then check the cap in the suitable position, or the defects is put
into red bin ,Finally , short circuit check again to ensure that there be no internal short J/R flowing
to next line.
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