What are the production methods of lithium batteries

1. The solution of the negative electrode material (1) First, the large particle size and ultra-fine powder must be separated from the required particle size to prevent the occurrence of chemical reactions and improve the safety of the battery cell. (2) The method that can increase the porosity of the material surface increases the capacity by more than 10%, and at the same time, the safety performance of the battery can also be improved under the condition of the same C/A ratio. 2. Manipulation of the pulping process (1) The pulping process generally uses special chemical reagents to minimize the tension between the positive and negative slurries. Improve the compatibility between the groups and prevent the reunion of materials in the mixing process. (2) During coating, the gap between the base material and the nozzle should be kept below 0.2mm, so that the surface of the pole plate formed in this way is smooth and free of defects such as particles, depressions, and scratches. (3) The storage time of the slurry should be kept for more than 6 hours, and it should be ensured that there is no self-agglomeration in the slurry. The average slurry is the uniformity of the distribution on the base material of the positive and negative electrodes of the battery, which improves the consistency of the battery. 3. Use advanced pole piece manufacturing equipment (1) Advanced equipment can not only ensure the quality of the pole piece, but also greatly improve the uniformity of the pole piece of the cell and increase the pass rate of the cell. (2) The density error value on the single plate of the coating machine should be small and controlled within a certain range. (3) Ensure that the frequency of the taper of the roller press of the roller press should not be greater than 4μm to ensure that the thickness of the produced plates is consistent. In addition, the equipment should have a good dust collection system, and be wary of short circuits caused by floating dust. (4) The slitting machine generally selects a roller knife type cutter, and then continues slitting equipment, so that the cutting effect does not have the shortcomings of lotus leaf edge, burr and so on. 4. Advanced sealing technology At present, domestic lithium batteries generally use laser (LASER) welding and sealing technology, which uses a YAG rod (yttrium aluminum garnet) laser cavity to emit a beam of light with a single frequency under the encouragement of violent light. (λu003d1.06mm) Then refraction is assembled into a beam, and then the focus is gathered between the barrel and the cover of the battery core to fuse them into one body to achieve the purpose of sealing and fusion of the cover and the barrel. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete it.