from chemistry to pack
eUSRacing is a multidisciplinary team of students from the University of Seville, Spain. We design and manufacture an electric motorbike prototype for MotoStudent, a competition where universities from all over the world compete to build the best motorcycle for a MotoGP-style race at the MotorLand Arag´on Circuit. Engineering, marketing, and business students join forces with … Read more
The BAK INR4695-330B battery cell is one of the ever increasing number of 46xx format cells. Based on the date on the specification sheet the start of production is 2023. Metrics Specifications Power9 Tech kindly provided us with the images of the cell teardown and their findings from this process. Regarding BAK 4695 battery cell … Read more
Where does it come from? Battery heat generation is not just about the ohmic I²R losses. There are three main contributors, each with distinct physical origins and implications for thermal modelling: The magnitude and proportion of each component vary with temperature, C-rate, and state of charge. This makes accurate lab characterisation critical for building reliable thermal models and … Read more
The Renault 5 E-Tech has two battery packs defined by usable energy of 40kWh and 52kWh. Initially the vehicle is launched with the 52kWh usable pack. This pack is assembled by Ampere, a subsidiary of Renault and using AESC pouch cells. This post has been built based on the support of and sponsorship from: Quarto Technical Services, Eatron … Read more
through Design, Thermal Management, and Revival Techniques Abstract Battery life (longevity) is a cornerstone of electric vehicle (EV) sustainability, particularly in fleet-heavy regions like India, where high usage, climate stress, and inconsistent charging behaviours accelerate degradation. At Yanti Innovative Electromotive Solutions, we focus on a revival-first approach to extend the functional life of EV batteries. … Read more
During the charge / discharge the cathode and anode undergo an expansion and contraction. As you charge a cell it expands, when you discharge a cell it contracts and as the cell ages over its lifetime we see a continuing cell expansion. Thus the cell expansion can be divided into: This expansion and contraction puts … Read more
The energy storage industry just crossed another important milestone. CATL has launched the world’s first 9MWh energy storage system built for mass production. The system is called the TENER Stack. This isn’t simply a larger container. Rather than building a single oversized unit that would trigger regulatory and logistical issues, CATL introduced a modular “two-in-one” … Read more
AION Engineering INC The 1.3 g/Ah Rule: A Starting Point When designing lithium-ion battery cells, a commonly referenced benchmark is the electrolyte mass-to-capacity ratio, typically around 1.3 g/Ah. This serves as a useful starting point for many applications, providing a baseline for ensuring sufficient ion transport within the cell. Why C-Rate Matters However, this ratio … Read more
The Ampace JP40 is a tabless 21700 cylindrical format cell designed to deliver high current discharge. Metrics A significant improvement in performance is achieved with the tabless design. The manufacturing video appears to show the ends of the jelly roll being bent over by an anvil that quickly comes in and punches the roll end … Read more
Author: Woody Wu at power9tech.cn Alumina and Boehmite are examples of ceramic coating materials used on separators. These can be applied on one side or both sides of the separator. Ceramic-Coated Separators Ceramic-coated separators consist of a base film (PP/PE) with a surface layer of heat-resistant inorganic ceramic particles (e.g., Al₂O₃, SiO₂, Mg(OH)₂), bonded tightly … Read more