Our Next Energy (ONE)

[MickeyAO]

This is another company I've been keeping my eye on for a while. Still hoping to get some of their cells in for testing.
While I'm not crazy about LFP, it seems to be where the market is shifting for low cost cells/packs. Just doesn't have the 'oomph' I love about NMC.

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[MickeyAO]

Around the 13 minute mark, you may pick up why the Bolt cells had issues and were recalled. Just a stubble hint.

 

[02Reaper]

Around the 14 minute mark, you may pick up why the Bolt cells had issues and were recalled. Just a stubble hint.

Sounds like to me the key to any of them is temperature management. If you have a temperature management system robust enough to keep batteries at an optimum temp, it seems these issues are pretty much solved.

 

[MickeyAO]

I put the wrong time stamp. Should be 13 minute mark when they talk about structure.

 

[GoodSam]

talk about structure

So the Bolt battery defects may have due to minor twisting of the coated electodes?

What causes the swelling? Maybe this is a good little article explaining what can happen:
https://www.grepow.com/blog/causes-of-lithium-battery-swelling.html
graphite expansion and gas?

I am surprised at how little Lithium, percentage by weight or volume, is in a "Lithium" based battery, 3% (or I also saw 11% elsewhere):
https://elements.visualcapitalist.com/the-key-minerals-in-an-ev-battery/

 

[MickeyAO]

Yes, it was the twisting of the electrodes that caused the problems. Funny thing is, we had a Bolt in for testing and dismantled the pack down to the cell level. I started to see problems during our Cycle Life testing and had several cells that had swelled. This was before all the recalls and stop charging started.

It was a great vehicle to drive. For the longest time I told tours that the Bolt was my second favorite, only behind the Model S. Of course the Lightning knocked both of those vehicles down a spot.

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