Analysis of manufacturing processes of lithium batteries with different packaging methods: square, cylindrical, and soft pack

In the new energy era, lithium batteries are the core power and energy storage unit, and their importance is self-evident. Among the many characteristics of lithium batteries, the external form of packaging shape actually contains complex technical considerations and process logic. The three mainstream packaging shapes of square, cylindrical, and soft pack each correspond to a unique process, like three keys, opening the door to different application scenarios. This article will deeply analyze the technical routes and process secrets behind these three lithium battery packaging shapes.

Comprehensive Solution for Negative Electrode Binders for Lithium Batteries

Overview of Lithium-ion Battery Binders

In the production of lithium-ion batteries, binders are often referred to as "auxiliary materials" together with conductive agents, additives, etc., but they are an indispensable key material. Their main function is to adhere active substances and conductive agents to the current collector to ensure electrical contact between powder material particles in the electrode and between the powder material and the current collector. Binders have a low mass ratio in the electrode and do not participate in electrochemical reactions. Their main function is to adhere active substances and conductive agents to the current collector to keep the electrode intact. Binders affect the formation of the solid electrolyte interface (SEI), charge transfer inside the electrode and between the electrode-electrolyte interface, the wetting behavior of the electrode, and the cycle performance and cost of the battery. Therefore, an ideal binder can ensure the stability of the electrode structure with the least possible usage.

PVDF, CMC, PAA, etc.! Research on Lithium Battery Binders

LIBs electrodes are mainly composed of electrochemically active electrode materials, conductive additives, binders, current collectors, etc. Among them, binders are an important component of LIBs electrodes. Binders can tightly attach active substances and conductive agents to the current collector to form a complete electrode, prevent the active substances from falling off and peeling off during the charge and discharge process , and can evenly disperse the active substances and conductive agents, thereby forming a good electron and ion transmission network and realizing efficient transmission of electrons and lithium ions.

Learn more about battery adhesives

1. Battery Adhesive

Lithium battery pole pieces are mainly composed of active materials, conductive agents, and binders. Usually, binders are inactive materials and account for a small proportion of the electrode. However, binders are an indispensable and important component in the preparation of lithium batteries, and play an important role in maintaining the integrity of the electrode structure and improving the electrochemical performance of the electrode.

Determined to Win || <AM> Professor He Xianru's team from Southwest Petroleum University: Realizing ultra-stable aqueous zinc metal anodes through efficient polymer interfaces that pre-establish ion transport pathways via electrolyte initiators

An article to understand EIS lithium battery applications, with typical circuit model diagrams

1. What is electrochemical impedance spectroscopy (EIS)? 🔍

1️⃣Electrochemical impedance spectroscopy (EIS) is a non-destructive parameter determination and effective method for determining battery kinetic behavior. A small-amplitude sinusoidal voltage signal with a frequency of w1 is applied to the battery system, and the system generates a sinusoidal current response with a frequency of w2. The change in the ratio of the excitation voltage to the response current is the impedance spectrum of the electrochemical system.

A complete guide to soft pack battery assembly, a must-read for researchers

🔋【Soft-pack battery assembly strategy: "flexible art" that researchers must see】

✨——From aluminum-plastic film to module integration, disassemble the "flexible code" of soft-pack batteries hand in hand!

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Presentation of Wanhua Chemical: Comprehensive Solutions for Lithium Battery Anode Binders