from chemistry to pack
Capacity testing underpins virtually every other cell characterisation measurement. State of health calculations, degradation modelling, thermal management design, and pack-level energy budgets all trace back to a reliable baseline capacity figure. This page covers the standards that govern how that figure is established, the distinction between formation and lifecycle testing, the mathematics of capacity tracking, … Read more
Specification sheets and battery cell lifetime is always about capacity loss, the percentage of the original capacity in Ah available versus number of cycles and time. However, the range of your vehicle and how long your battery can support your house for is dependent on the amount of energy available. Hence this paper caught our … Read more
AION Engineering INC When selecting cells for a battery pack, one of the most critical considerations is the discharge C-rate. While datasheets provide discharge ratings, understanding the difference between continuous and peak discharge C-rates — and their thermal implications — is essential for safe and efficient battery design. What is Continuous Discharge C-Rate? The continuous … Read more
AION Engineering INC In previous discussions, we explored the relationship between cell capacity, C-rate, and electrode density. A key parameter influencing electrode density—and thus overall cell performance—is the particle size distribution (PSD) of the active material. Why PSD Matters The PSD of active materials directly impacts their tap density and compactibility—two critical factors that determine … 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
We would expect to see an improvement in Cell to Pack Ratio vs Cell Capacity. That means that as the cell get larger so the use of the pack volume becomes more efficient. As expected the transport battery data from the pack database shows this relationship. However, the upper pareto frontier for the data shows … Read more
In school, we learn that the voltage across circuit components in parallel is the same, and the current is split between them according to their resistances. For components in series, the current through each is equal and the voltage drops off. In a simple model, the total capacity of a battery pack with cells in … Read more