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The basic concept of thermogravimetric (TG) analysis   Thermogravimetric analysis It is a technique that measures the relationship between the mass of a substance and temperature or time under a programmed temperature. By analyzing the thermogravimetric curve, we can determine the composition, thermal stability, thermal decomposition of the sample, and its possible intermediate products, as well as information related to the product’s quality. The applications of thermogravimetric analysis are primarily in metal alloys, geology, polymer materials research, and pharmaceutical research. Derivative thermogravimetric analysis is derived from thermogravimetric analysis and involves recording the first derivative of the TG curve with respect to temperature or time. The experimental result is the derivative

1. What is High Power Pulse Characterization (HPPC) testing? 1.1 Definition of HPPC testing High Power Pulse Characterization (HPPC) testing is a widely accepted method for assessing battery performance. It involves applying a high power pulse current to the battery, mimicking real-world operating conditions. This technique effectively evaluates key battery parameters such as power characteristics, energy density, internal resistance, and dynamic performance. HPPC testing is extensively utilized in electric vehicles, grid energy storage systems, and consumer electronics.   Figure1 HPPC test profile 1.2 Historical background of the HPPC test HPPC testing emerged from the need to deeply understand battery performance in electric vehicles, with the goal of replicating the various

The importance of high precision in battery testing   In battery testing, precision is of utmost importance and should not be underestimated. It directly impacts the accuracy and reliability of battery performance evaluations. High-precision testing equipment can swiftly detect signals indicative of battery performance, thereby enabling more effective and accurate long-term predictions. Through high-precision testing, subtle trends and nuances in battery performance can be observed, which may serve as the earliest indicators of battery degradation. In battery modules and packs, the consistency among individual batteries is critical to the overall reliability and lifespan of the system. High-precision testing can help identify and mitigate performance disparities between batteries. During battery manufacturing,

IEC 60086-4 IEC 60086-4 Standard Overview IEC 60086-4 is a standard established by the International Electrotechnical Commission (IEC), officially titled “Primary batteries – Part 4: Safety requirements for lithium batteries.” This standard outlines the safety testing and requirements for primary lithium batteries to ensure their safe operation during both intended use and foreseeable misuse scenarios. It is applicable to both standardized and non-standardized primary lithium batteries and covers aspects such as battery design, quality planning, sampling, testing, and safety warnings. The IEC 60086-4:2019 edition was published on April 25, 2019, replacing the previous 2014 edition. This updated version includes several technical revisions, such as: Modifications to explosion criteria. Addition of

The impact of battery performance on the EV industry   Battery performance is at the heart of the electric vehicle (EV) industry, directly influencing the driving range, charging time, safety, and overall user experience of vehicles. Efficient batteries can provide a longer driving range, reduce the frequency of charging, and thus alleviate consumers’ range anxiety. The development of fast-charging technology relies on battery performance, which can significantly reduce the time required for charging and enhance user convenience. Moreover, battery safety is a key factor in public acceptance of EVs; the quality of battery performance is directly related to the vehicle’s safety record and brand image. The reliability and durability of