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Neat. These are not as widely used as they perhaps should be in end-user packs. I wonder if you can get them with Halotron in them.... I should...
Just offhand: 1) Physical barrier between cells makes propogation through the pack of catastrophic cell failures more difficult. 2) Aids in...
Oh, while we're on the subject of fusing...I also recommend fusing your V sense lines at a nice, low current.
In this case, I would change "is" to "can be". Pack performance will be limited to the performance of the weakest series element in the pack, but...
Some cylindrical cells have the can tied to anode or cathode potential, others do not. A123's 26650 can is at cathode potential, the 32113 can is...
Hi Paul, Thanks for the kind words. All batteries are affected by temperature and none of them like extreme cold. Most batteries perform better...
Looks like a nice start here, John. BTW, since I see the question asked above, I don't know what the exact rating for the cell tab zipper fuse...
Fisker fire investigation info. Fisker completes investigation of latest Karma hybrid EV fire, issues vehicle-wide cooling fan recall The...
My guess here is that you somehow got two sense lines shorted together and burned up your harness with massive current. Replace the wires and/or...
Sorry, I laughed pretty hard for a second there. I highly doubt these were built by anyone at A123, and they are definitely NOT production cells...
"Manual" balancing is balancing that is done by a person who attaches loads or power supplies to individual cells or groups of cells by hand, as...
Charged is my favorite EV magazine--highly technically competent, and largely devoid of hysterical political nonsense and misinformation. The...
1) It's spelled Wanxiang, pronounced approximately "wahn-SHUNG", and the entity that own A123 LLC is more specifically known as Wanxiang Clean...
Hi John, Hard numbers are difficult to produce for a naked cell that can be packaged any number of ways, but if you go to Prismatic Cell |...
This video is definitely not from A123--there is no Li metal in our cells at all. All our Li is suspended in the electrolyte in an ionic state,...
Ok, I gotta know....why is this?
Hi Dan, (What's a NUGET?) Resistors are used in systems with "passive balancing". In "active balancing", excess charge from high cells is shuttled...
I agree the specs are not generally well written; they tend to be much too vague. There can be many reasons for this, but most common seems to be...
I don't believe active balancing removes the usefulness of CV at top of charge. It just makes charging and balancing more efficient--and not by as...
The battery in the Boeing jetliner is not LFP, but a chemistry with Cobalt. Thermal runaway is primarily associated with Li chemistries that...
