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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...

Lithium metal batteries have attracted significant attention due to their high energy density. However, their development has been hindered by issues such as uncontrollable dendrite growth of lithium metal anodes, unstable solid electrolyte interphase (SEI), and poor cycling stability. Solid-state electrolytes (SSEs) are attractive due to their inherent safety, with polymer solid-state electrolytes (SPEs) receiving particular attention for their processability, cost-effectiveness, and good contact with electrodes. However, traditional SPEs (such as poly(ethylene oxide) (PEO)-based electrolytes) have low ionic conductivity (typically <10⁻⁵ S cm⁻¹ at room temperature), limiting their application at room temperature. Recently, Kang Feiyu, Lu Wei, Liu Ming, and He Yanbing’s team from Tsinghua University’s Shenzhen International Graduate School proposed a 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) diluent to significantly modulate dipole-dipole interactions in polymer...

In the new energy era, lithium batteries , as the core power and storage units, are of undeniable importance. Among the many characteristics of lithium batteries, the packaging shape, though an external manifestation, actually contains complex technological considerations and technical logic. The three mainstream packaging shapes—square, cylindrical, and soft pack—each correspond to unique manufacturing processes, akin to three keys that open the doors to different application scenarios. This article delves into the technical routes and manufacturing mysteries behind these three lithium battery packaging shapes. 1. Square Lithium Battery: Craftsmanship Behind Solidity (1) Structural and Design Advantages The square lithium battery is known for its regular shape, which offers significant advantages in space utilization. Its flat structure can be tightly arranged, making it suitable for scenarios with high space layout requirements, such as battery modules for electric vehicles. Structur...

Introduction: Button cells are one of the commonly used battery types in laboratories, widely applied in material development, electrochemical performance testing, and other fields. This article provides a detailed introduction to the complete process of button cell electrode preparation and battery assembly, including required materials, equipment, steps, and precautions, offering comprehensive guidance for relevant researchers. 一. Overview of Button Cells Button cells consist of a set of button cell casings and internal components. Stainless steel battery casings are widely used in laboratory testing due to their good electrochemical stability, excellent sealing, small size, simple assembly, and low cost. Common models include CR2032, CR2025, CR2016, etc., with CR2032 battery casings (20mm in diameter, 3.2mm in thickness) often used in laboratories. Additionally, there is a reusable Swagelok battery, with a stainless steel casing and PTFE liner, suitable for battery disassembly and a...

【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 par...