Westart full-automatic production line introduction
There are 16 main processes from mixing to finished cells, which are completed in constant temperature, humidity and dust free workshop. The new mass production line is built according to the industrial 4.0 standard, which adopts full-automatic production, full-automatic logistics, MES system, and online automatic detection for all key processes to realize closed-loop monitoring and automatic adjustment, so as to ensure the high quality of cells.
Fully Automatic Feeding Center
This is the first process. We use the full-automatic feeding system to synthesize the uniform flowing slurry under the high-speed dispersion of the active substances, conductive agents and adhesion agent of the cathode and anode. The slurry is transported through the pipeline and sealed throughout the whole process that the feeding accuracy is controlled within ± 2 ‰.
Fully Automatic Coating System
We use double-sided extrusion coating machine, of which efficiency is more than 2 times higher than the general coater with cathode and anode isolation control. The front and rear three X-ray area density thickness meters are monitored on line, and the closed-loop automatic adjustment and control are realized. Steam heating technology is used in coating process, which can save more than 50% energy consumption compared with electric heating technology. In addition, the condensate recovery system of high tower is adopted for organic solvent to achieve 100% recovery and zero discharge.
Fully Automatic Rolling, Slitting and Die Cutting
This is to automatically roll the coated roll into the standard thickness of the piece, which is slatted and dead cutting into standard size automatically. In addition, the missing rate of the defect and size of the electrode piece monitored by CCD online is 0%.
Fully Automatic Stacking
After the pole piece is shaped according to the process requirements, and then, we can stack the positive pole piece, diaphragm and negative pole piece one by one to form the cell through the automatic laminating machine. The CCD secondary positioning can effectively guarantee the alignment of positive and negative pole pieces of lamination, at the same time, automatic on-line detector, which has X-ray, can effectively detect the misplaced products.
Fully Automatic Welding Wrapping
After the cell stacking is formed, the cell is welded with the lug and packed with aluminum plastic film. In addition, we use imported automatic ultrasonic welding machine to weld the whole process, and CCD automatically detects the welding size and accuracy.
Fully Automatic Baking
The battery is most afraid of moisture. We use the automatic drying line to evaporate the residual moisture in the pole piece and diaphragm through high vacuum and high temperature baking, so as to control the moisture content in the cell. It adopts the robot to load and unload materials, turn around, let the baking box open automatically, and automatically bakes according to the set process that the single baking time is less than 5h, the temperature of the electric cell baking splint is controlled within ± 3 ℃, and the baking consistency is high. In addition, this drying technology is also the most advanced in domestic battery baking technology.
Fully Automatic Filling
Fill electrolyte into the cell. We use the whole process automatic liquid filling machine to connect with the automatic logistics RGV for loading and unloading, in addition, vacuum liquid filling, of which accuracy is within ± 0.5g.
Fully Automatic High Temperature Pressurized Formation
The process of formation is simply to activate and electrify our cells, which depends on the following automatic high temperature pressurized equipment to complete! In addition, our charging and discharging system adopts energy feedback type, which can reduce energy consumption by 30-40%!
Fully Automatic Vacuum Secondary Packaging
After the cell is activated, we will carry out the secondary quality inspection and extract the vacuum gas generated in the formation process inside the electric cell. And then, cut and reshape after secondary packaging.
Fully Automatic Sub-capacity
This is to carry out full-automatic capacity detection on the cell, and the automatic sorting is poor. Each cargo space is equipped with smoke detector and temperature probe to detect the temperature in real time, so as to give an over temperature alarm; Each cargo space is equipped with sprinkler. In case of fire alarm, the cargo space shall be immediately sprayed for fire-fighting.
The last but not the least, the quality inspector shall finish the quality inspection of the cell and send it to the stacking storage. Such being the case, the process has been completed.