from chemistry to pack
Jerry Wan’s post (right) asks whether cell design has a “golden ratio” for aspect ratio. He concludes that there isn’t a universal one, and that’s right. But the reasons are worth working through, because the best shape changes completely depending on where the tabs are and which edge the heat leaves by. A ratio that … Read more
2026 Renault Megane E-Tech LFP battery pack with LG Energy Solutions pouch cells and a Cell to Pack design. However, we immediately feel that this isn’t the best battery package when we see Renault’s own description: Thanks to the larger battery, the new Megane E-Tech Electric is slightly taller (20 mm) than before and also … Read more
The 2025 Porsche Cayenne EV Battery is an interesting design that uses LG Chem pouch cells and as such sticks with a modular based design. The power electronics are arranged in an enclosure that is fixed to the top rear of the pack, a very traditional approach. Metrics This post has been built based on … Read more
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
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
Charging Current Control Strategy Based on Online Evaluation of the Chargeability Status of its Cells Authors: DIAB Raymonda, SCHAEFFER Emmanuel, AUGER François, POIZOT Philippe, COUSSEAU Jean-François Context Charging time reduction allows : Challenges Standard fast charging methods of Li-ion batteries : Methodology This algorithm enhances the charging current in order to maintain the observed overpotential … Read more
This is a follow-up to “10 things about Solide State Batteries (SSBs) that you are often not told”, January 10, 2023 Author Dr. Simon Madgwick of Nuvvon Inc. In “10 things about Solid State Batteries (SSBs) that you are often not told”, number 9 was a brief explanation of Packaging, with the promise of a subsequent … Read more