the unfortunate tetrahedron

So for lifetime, I’ve made my point. Everything in that piece assumes that the BMS and battery are well designed and well matched.

An astute reader writes in wanting to make sure I clarify that this issue around safety for this. This…

Recently Braga et. al. published Alternative Strategy for a Safe Rechargeable Battery in Energy and Environmental Science. This is a subtle title for a work, if reproducible and truly invoking the mechanism described in the article, will have a lasting impact on the battery community. As…

An astute reader asked me to clarify this for safety, which you can find here. This piece focuses on lifetime. Remember: a badly designed or defective battery should never be used at all. This piece assumes that your cell phone is not the 1 in 1,000,000…

I believe in dogfooding; I am using my musings on the Unfortunate Tetrahedron as a primer for my own students and students-to-be. This was a perfect reason to trick my current team into copy editing. It also brought out a great question: let’s see the tetrahedron applied.

There seems to be some confusion over the economics of the Powerwall with respect to solar.

Right now the Powerwall, when not used for backup, makes electricity more expensive in most states.

Professor Goodenough recently provided an update to his “Braga” battery in this this brief interview with Bloomberg New Energy Finance. About halfway through he states:

Goodenough: We’ve found a lot of things you can do with the Braga glass…

On Inventory

In the beginning of the recorded history of batteries, there was no formal distinction between rechargeable, or secondary, cells and…