Been going down a bit of a rabbit hole on this lately.
We talk a lot about LFP chemistry being inherently stable, but I hadn't really thought about the mechanical side until recently — prismatic cells still expand and contract with every charge cycle, and over thousands of cycles that adds up.
Watched a video on how steel-band design approaches this — basically uniform compression across the cell stack to manage that expansion consistently. Hadn't seen this discussed much before, and it made me wonder how widespread this kind of design consideration actually is across the industry.
So genuinely curious:
- Any real-world data or anecdotal evidence of swelling-related degradation in systems without active compression management?
- Is this a fairly standard design across the industry? Other approahces manufacturers use that you've come across? Or, is this largely unaddressed in most systems?
u/EastLifeguard5425 — 11 days ago