from chemistry to pack
About Energy
Most cell selection still begins with datasheets, because they are the only information engineers can easily access early on. That is understandable, but it is also why teams spend months testing “promising” cells that later fail in a real pack. The root issue is simple: a cell is not a battery pack. Effective selection requires … 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
A Closer Look at SoC in Theory and Practice State of Charge (SoC) is one of the most used metrics in battery engineering, but also one of the most inconsistently defined. SoC is often described as the percentage of charge remaining in a battery, but what that percentage refers to depends heavily on how the … Read more
Molicel, the Taiwan-based manufacturer known for producing some of the most trusted high-power lithium-ion cells, is expanding its 21700 product line. Long a favourite in motorsport, drones and aerospace, Molicel is now building a broader portfolio to serve a wider range of performance and energy demands. Their current roadmap outlines three distinct 21700 series: the … Read more
Cylindrical lithium-ion cells have long used metal tabs to connect the current collectors to the terminals. These tabs act as the path for current to flow out of the electrode layers and into the external circuit. While this design has been reliable for decades, it introduces a few well-known limitations, particularly for high power applications. … Read more
Most lithium-ion cells are rated to operate from –40 to 80 °C, yet few ever experience the extremes for more than a few minutes. In real-world operation, temperature tends to converge within a much narrower band. This is typically between 30 and 50 °C. That reality should guide how battery models are trained if they are to … Read more
While individual battery cells can charge in under 15 minutes, EV battery packs take much longer to fully charge. There are a number of factors that influence that, including temperature spread across the pack. Key Factors Limiting Battery Cell Lifetime During Charging At the cell level, the fastest rate at which a battery cell can … Read more
Intelligent Battery Management Systems Battery Management Systems (BMS) are crucial for optimizing the operation of batteries by monitoring and controlling key parameters. Through real-time measurements of voltage, current, and temperature, BMSs can predict a battery’s performance, aiding in making informed decisions to enhance its lifespan and charging efficiency. The core functionalities include: These capabilities of … Read more