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NEWARE battery testing system, with its exceptional technical performance, provides strong support for the parameter assessment of new energy vehicles. The system not only ensures high precision and reliability in the measurement of the State of Charge (SOC) but also significantly enhances the intelligence and efficiency of the battery management system through features such as real-time monitoring, comprehensive safety protection, and high communication compatibility. In the field of in-depth research on the performance of new energy vehicles conducted by universities and research institutes, the NEWARE battery testing system has become an indispensable tool, making a significant contribution to the development and application of new energy battery technology. Through its accurate

Lithium-ion batteries, as the most mainstream rechargeable battery technology, have developed rapidly in recent years. The energy density and charging speed of new lithium-ion batteries continue to increase, and the cost continues to decline. At the same time, people have also turned part of their attention to improving battery life, safety and so on. Among them, estimating the state of charge ( SOC ) of the battery is one of the effective methods.   In recent years, there are many methods to estimate the SOC of lithium-ion batteries, such as traditional estimation methods, model-based estimation methods and data-driven estimation methods. However, each type of method still has shortcomings. Traditional estimation

Since its commercialization by Sony in 1991, lithium-ion battery technology has seen significant advancements due to its high energy density and efficiency. In 2022, the global inventory of electric vehicles exceeded 26 million units, marking a 60% increase from the previous year. Today, lithium-ion batteries have developed into various forms, ranging from standard 18650 cylindrical cells with capacities of around 3Ah to large pouch or prismatic batteries with capacities exceeding 100Ah. The 4680 battery (46mm in diameter and 80mm in axial length) offers higher energy and power advantages compared to commonly used 18650 or 21700 cylindrical cells. Compared to the 21700 battery, its volume is 5.5 times larger. This large

With the increasing global demand for renewable energy sources and decreasing fossil fuel reserves, the development of efficient, low-cost, and safe energy storage technologies has become an urgent issue. Sodium-ion batteries (SIBs) show great potential for large-scale energy storage applications due to their abundant sodium resources and low production costs. Sodium-ion batteries (SIBs) not only inherit many of the advantages of lithium-ion batteries, but also overcome the problems of lithium resource shortage and high cost. However, SIBs still face many challenges when used in a wide range of temperatures. In this paper, the design principles, failure mechanisms, basic chemistry and safety issues of sodium-ion batteries will be described in detail.

I. Composition of electrolyte 1. Introduction to the composition of the electrolyte Electrolyte is the key medium for ion transfer in lithium-ion batteries, mainly composed of the following three parts: Solvent: As the base medium of the electrolyte, it provides a stable chemical environment that allows lithium ions to move freely within the battery. The chemical and thermal stability of the solvent directly affects the safety and cycle life of the battery. Lithium salt: Lithium salt is the ion source in the electrolyte, which dissociates lithium ions in the solvent, and these ions realize charge transfer through migration during battery charging and discharging. Without effective lithium salts, the electrolyte will