Peyman Mohtat

Battery Algorithm Engineer @Apple | PhD @umichme | battery enthusiast 🔋.

[electrochemicat @electrochemicat]

Comparison of expansion and voltage differential indicators for battery capacity fade (relevance: 100%) https://t.co/elGkSiq4GJ #battchat #batterytwitter

[Peyman Mohtat @PMohtat]

The experiment in this work covers a wide range of stress factors for battery aging. The dataset is available here if you are interested: https://t.co/TXcFyopcoc

[Peyman Mohtat @PMohtat]

Excited to share our recent work on comparing voltage and expansion differential signals for capacity estimation w/ @anna_energy & others. You can access the PDF for the next 50 days at the following link: https://t.co/4jFlpAMUFZ

[Peyman Mohtat @PMohtat]

Key finding: differential expansion signal has a higher correlation to the capacity fade compared to the differential voltage + remaining observable at high C rates up to 1C.

[Valentin Sulzer @valentinsulzer]

This is great work led by Andrew Weng, who really put in the extra mile to get to the bottom of what we were seeing in the data.

Lots of amazing insights in this paper; quick 🧵 on the main one, which showcases the explanatory power of very simple models (OCV + kinetics)

[Anna @anna_energy]

we have identified internal resistance, measured immediately after cells are made, as a key indicator of how long a battery will last. We used it with fast formation. details and free downloads till Dec 10 at https://t.co/SIxzuK2rMy

[electrochemicat @electrochemicat]

Reversible and Irreversible Expansion of Lithium-Ion Batteries Under a Wide Range of Stress Factors (relevance: 100%) https://t.co/f5RTwv8OQc #battchat #batterytwitter

[Peyman Mohtat @PMohtat]

Our team at Apple is hiring a Battery Electrochemical Modeling Engineer! Please visit the link below for more info and feel free to DM me if you are interested! https://t.co/hwiFfVzA13

[Valentin Sulzer @valentinsulzer]

Super excited to share our recent work on accelerated battery lifetime simulations using adaptive inter-cycle extrapolation

Simulate your entire battery's lifetime, using physics-based models, in under 5 seconds!

https://t.co/co4flkee46

[Valentin Sulzer @valentinsulzer]

New preprint on arxiv led by @PMohtat

We propose a fast charging algorithm that automatically minimizes charge time while satisfying voltage, overpotential, stress, and temp constraints. This is achieved simply by adding a single ODE to any model.

https://t.co/ZqrXRlWfzN

[Valentin Sulzer @valentinsulzer]

Now out in press in Joule! Read for our views on predicting lifetime in the contexts of the lab, the field, and for second-life - and what research directions are needed to lower costs and improve safety and reliability

[Peyman Mohtat @PMohtat]

On May 18, I successfully defended my PhD dissertation @umichme . Really excited for the next chapter!!!

[Valentin Sulzer @valentinsulzer]

@anna_energy and I are putting together a list of available battery courses for @naatbatt:
https://t.co/gWG7bWqSbj

If you teach (or have recently taken) such a course we would love to hear about it here:
https://t.co/4ER3tMWVuM

Please share widely!

[John Foulkes @foulkeswagen]

Great slide from @benchmarkmin #Benchmark2020 session today from Dr. Ryan Bayliss breaking down what's in a modern Li-ion #battery.

This is your supply-stream investment thesis folks:

22% #graphite
17% #copper
15% #nickel
8% #aluminium
3% #cobalt
2% #lithium

in this example.

[Tesla @Tesla]

shout-out to anyone who turns on Dog Mode even though the only dog in the car is themselves, a human, who wants to be a dog

[CleanTechnica @cleantechnica]

Sweden Will Ban Sale Of Gasoline & Diesel Cars After 2030. Germany Lags Behind https://t.co/eIKVQ9lNYF

[The Grand Tour @thegrandtour]

The Grand Tour returns for Season 2 on 8 December, only on Amazon Prime Video. https://t.co/4L4kwSSAVc #TheGrandTour

[Peyman Mohtat @PMohtat]

@JeremyClarkson @AmazonVideo Congratulations! can't wait for the show.

[Peyman Mohtat @PMohtat]

Happy new year everyone! #newruz #1394 #PersianNewYear