锂电池英文生产过程

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.

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.

Vocabulary:

J/R 极芯 tape 胶纸 electrode 极片 multi-meter 万用表 Spot welding 点焊 Ni tab 极耳 Ultrasonic weld 超焊 Insulator 隔圈 centrifuge machine 甩壳机 defect 次品 red bin 红盒