Recently, many friends have asked us how to build 18650 battery pack, what are important factors about lithium ion battery assembly, what need to be considered in building a battery cell assembly, how to calculate the budget? As a factory manager, what all aspects need to be involved in order to ensure the smooth commissioning…

Since Tesla proposed 4680 cells in September 2020, the large cylindrical battery has once again become a hot topic in the industry. In addition to Tesla, China’s head battery factories have also begun to join the batch industrialization investment of large cylindrical batteries, such as EVE, BYD, etc. Based on the popularity of cylindrical cells,…

The positive electrode slurry is composed of binder, conductive agent, positive electrode material, etc.; the negative electrode slurry is composed of binder, graphite carbon powder, etc. The preparation of positive and negative electrode slurries includes a series of processes such as mixing, dissolving, and dispersing between liquid and liquid, liquid and solid materials, and this…

The main purpose of coating is to evenly coat the slurry with good stability, good viscosity and good fluidity on the surface of copper foil or aluminum foil. Its significance to lithium batteries is mainly reflected in three aspects: consistency, cycle life, and safety. During the coating process, if the thickness of the positive and…

The significance of rolling is to compact the electrode sheet and increase the energy density of the battery. After the electrode sheet is coated and dried in the previous process, the peel strength between the active material and the foil is very low, so it needs to be rolled to enhance the bonding strength between…

The function of the slitting machine is to slit the rolled electrode sheet to the required width, which is the key process before winding. The low-end slitting machine has low mechanical precision and simple tension control, which cannot adapt to the slitting of ultra-thin film materials. With the improvement of users’ requirements for slitting efficiency…

Tension control is the core technology that affects the advanced degree of winding machine. During the entire winding process, in order to ensure the high consistency of the battery assembled from the cells, special attention should be paid to the tension control of the winding. The difference in tightness caused by tension fluctuations will cause…

When the stacking machine is used in the production of pouch batteries, it can achieve higher performance and safety than cylindrical and prismatic batteries. The stacking machine stacks the positive electrode sheet, separator, and negative electrode sheet in order to form a small battery cell, and then stacks the small battery cells in parallel to…

Control the amount of liquid electrolyte and injection time, so that the liquid electrolyte is injected into the battery from the liquid injection port. The main purpose is to form ion channels, so as to ensure that the battery has enough lithium ions to migrate between the positive and negative electrodes during the charging and…

The composition, content and detection system are the most critical links in the back-end process. The composition and capacity of the lithium battery cell is to realize the initialization of the battery by charging and discharging, and activate the active material of the cell, which is a process of energy conversion. The composition and capacity…