新威技術 Company Profile

In performance evaluation, strict verification is conducted across four axes: "capacity measurement," "charge and discharge characteristic analysis," "2000-cycle durability testing," and "AC impedance diagnosis." In terms of safety, a five-tier defense system has been established, including a 150°C thermal runaway test and a 1.5t crush test. Notably, the AI predictive diagnosis system leads innovation, enabling the prediction of thermal runaway 48 hours in advance using spectroscopic analysis. In environmental adaptability testing, operational guarantees have been achieved under rapid temperature changes from -50°C to 85°C and in low-pressure environments at altitudes of 5000m. As the development of all-solid-state batteries for EVs accelerates, evaluation technology continues to evolve as the foundation of the energy revolution.

The LR44 battery is a small yet high-performance alkaline button battery that is used in various applications. It has a diameter of 11.6mm, a height of 5.4mm, and a nominal voltage of 1.5V, providing a reliable power source for a wide range of devices such as calculators, thermometers, toys, and medical equipment. Equivalent models include AG13, A76, 357, and 76A, which are also highly compatible and meet diverse needs. Proper handling and storage can extend the battery's lifespan. Additionally, the new Wei battery tester CT-9000-5V5A achieves high-precision charge and discharge testing and is equipped with multidimensional testing functions such as internal resistance measurement and electrochemical property evaluation. This contributes to the improvement of device and battery performance.

This paper explains the processes of electron conduction and ion diffusion in lithium-ion batteries. Within the battery, electrons move through the external circuit while ions diffuse internally, triggering electrochemical reactions. To optimize performance, it is important to suppress the polarization phenomena that occur during charging and discharging, and to improve the interfacial properties of the materials. The ion diffusion rate determines the reaction rate of the battery, so it is necessary to accurately evaluate its characteristics. Therefore, the Galvanostatic Intermittent Titration Technique (GITT) is used to measure the ion diffusion coefficient. GITT analyzes the relationship between the battery's potential and time, providing information about reaction kinetics. In the tests, a constant current pulse is applied, and the diffusion of ions to reach equilibrium is observed after the current is stopped. GITT is based on Fick's law of diffusion and is a method for evaluating ion diffusion rates. In experiments, it is important to reduce the current pulse and allow for a relaxation time to obtain stable potential changes. Additionally, the GITT method has been applied to research on lithium iron phosphate composite electrodes and aqueous zinc-ion batteries, demonstrating that specific structural characteristics (e.g., porous structures) promote ion diffusion and enhance battery performance.