I recorded some data. See that the 100% SOC criterium is 16.9 V, which in a 4s config is 4.225 V per cell. You can also see the relaxation.

zenodo.org/records/1485...

I’ve logged battery data from my personal devices and found that in some cases the bms holds a voltage over 4.2 V for long periods. I wish the bms gave users the option to stop charging at a custom limit.

1. Mechanical Engineering, satellite designer

2. Any kind of STEM degree is a good start. The battery field technically diverse. Things are changing so fast, I think the most important skill is to be able to learn quickly and adapt.

I think he makes a good point that 20 or 30 years ago if you were a smart student who wanted to get a high paying job - you probably didn’t study electrochemistry.

We value bankers. We value lawyers. We don’t value scientists or engineers as much. But China does. The solution starts there.

Have you seen the interview Robin Zheng (CATL CEO) did with Norges Bank? He covers some of that. The whole thing is worth watching, but minutes 6-11 are on topic for this.

youtu.be/5VIXjjw4u9A?...

Where “negatrode” a shorter synonym for “negative electrode”?

I can add it as an altLabel in the ontology, if there some authoritative source to cite for it.

Anode and negative electrode are often used interchangeably, even though they have different meanings.

Best is to be familiar with the IUPAC and IEC definitions of those terms to select the appropriate one. For battery-related topics, “negative electrode” is usually best.

This was mentioned in @theeditorr.bsky.social ‘s recent piece.

bsky.app/profile/thee...

Reminds me of the cell on the bell in Oxford that has been ringing since 1840.

en.m.wikipedia.org/wiki/Oxford_...

Cell on the bell?

I agree. There are many examples of terminology challenges in battery and electrochemistry research. This is one reason we created domain ontologies for them, that lean heavily on recommendations from IUPAC and the IEC.

github.com/emmo-repo/do...

This JRC analysis says ca. 4 million tonnes for battery applications by 2040 rmis.jrc.ec.europa.eu/analysis-of-...)

IEA global EV outlook also has some projections for this.

Yes please! Thanks for curating this, @gavindjharper.bsky.social 🙏🏻🔋🙌🏻