4680, the new battery cell form factor is here. And we believe we’ve found the specs of the first cells being produced. Any upcoming, improved battery chemestries can also be used in these cells for improved energy density. So, this a big deal for emtbs? Well, not really.
Im only interested in this because im waiting for lifepo4 batteries etc to ‘get there’ and enable me to go off grid.. ebike battery improvements are a bonus
It will be a big heavy battery with 1000ish Wh. The BMS will be easy as it will only be 10 batteries. Overall it won’t be a revolution, just another similar speced battery.
No. It’s imposable to make a 700wh battery with them. 4680 will be at least 25amp hours per battery.
Personally, I like big cells. I want to see them used on everything from ebikes, to robots, automobiles, aircraft, power tools, & USB batteries.
In practical terms, I don’t know of many ebike battery case dimensions which would currently accommodate 4680s very efficiently…? I’m trying to picture a Dorado style car using 4680 cells, & I’m not sure the geometry works out to an efficient use of space?
≠”Dorado style car”
LOL, YT promising 700W for years, face it, they were just lying through their teeth. Even IF they finally come out with a larger battery, they duped a lot of people into buying Decoys based on untrue speculation.
The BMS would be exactly the same. BMS’s monitor only the parallel groups, not each cell in a parallel group.
A 10S1P battery has the same number of monitoring "wires" as a 10S2P pack.
But, it would be interesting to know from those here who are good at maths (not me!) what their opinion is about the difference in final volume (and hence energy/volume density) of a complete battery with these new cells compared to the other traditional cells when arranged in three columns of cells and 4 columns of cells. Anybody got the time, inclination and know how for that please?
What got me thinking about this was a consideration of down tube volume and centre of mass for a completed e-bike as part of a complete consideration of which battery cell is best in which situation for an ebike. Looking at the Tesla flat battery pack travelling low in the chassis make my point well, where the issue is the volume of space (air) between the old and new cells.