tabless

Why Do Wound Cells Typically Have Higher Internal Resistance Than Z‑Stack Cells?

tabbed vs tabless cell electrodes

AION Engineering INC In lithium‑ion battery design, internal resistance is one of the most critical parameters governing power capability, heat generation, fast‑charge performance, and overall efficiency. The difference in internal resistance between wound (spiral/jelly‑roll) cells and Z‑stack (stacked) cells is often misunderstood as a chemistry issue, while in reality it is largely a current‑path and … Read more

BAK INR4695-330B

BAK 4695 images of cell teardown

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

Tabbed vs Tabless Cylindrical Cells

tabless end of a cell

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