【Overview】： The rolling of battery electrodes involves the friction between the rollers and the electrode, which draws the electrode sheet into the gap between the rotating rollers. During this process, the electrode sheet undergoes compression and deformation. Unlike the rolling of steel, where the rolling process mainly causes the material to extend longitudinally and widen laterally without a change in density, the rolling of battery electrodes focuses on the compaction of active material on both the positive and negative electrode sheets. During this process, the particles undergo migration, rearrangement, and embedding, resulting in reduced voids between particles and a denser arrangement. The purpose is to increase the compaction density of the positive or negative electrode materials. Proper compaction density can increase battery discharge capacity, reduce internal resistance, minimize polarization loss, extend cycle life, and improve the utilization rate of lithium-ion batter...
Introduction Soft-pack battery cells, referring to cells using aluminum-plastic composite film as packaging material, have seen widespread application in the lithium-ion battery field due to their high energy density, enhanced safety, and flexible design. Below, I will provide a detailed introduction to the manufacturing process of soft-pack battery cells, covering material preparation, critical steps, and post-processing aspects. 1. Cell Design Cell design refers to the process of assembling the cathode material, anode material, electrolyte, separator, and current collectors for the positive and negative electrodes in specific proportions and processes to meet particular electrical performance requirements. This process requires designers to understand the characteristics of various materials, possess extensive electrochemical knowledge, and have the ability to think logically and comprehensively. 1.1 Clarify Design Requirements It's important to clarify the usage scenarios for th...