Username1
100 W
- Joined
- Nov 26, 2013
- Messages
- 168
A battery made of a single cell. For something like a car it would be physically impossible, but for a moderately powered ebike or escooter it actually does seem possible according to physics. No doubt it's not the most practical, and the cells/motors/controllers/chargers aren't currently being produced to make this. Never the less it seems like it would have many advantages.
You would have extreme simplicity, just a single cell with 2 wires attached. There would be no issues with cells becoming out of balance. No BMS needed. Very simple charging. No pack needing to be assembled with it's various connections. Extremely safe to touch voltage. You could also potentially get some benefit in energy density due to the lack of packaging and spacing.
For a 1kw motor, would need around 275 amps (with lithium ion) which would be quite thick wire but could be done. Obviously the motor would have to be designed a little differently with this in mind. The cell would have to be huge and nobody is currently making cells like this. I'm assuming a controller could be designed for this voltage, but I'm really not sure. You would need specially designed chargers etc.
So while i understand it's not practical or convenient at this time, does it sound like a good idea in theory? It would require a totally clean sheet vertically integrated approach (Apple or Tesla like approach, and probably price tag). So I doubt it will happen any time soon if ever, but just an idea I've thought about.
You would have extreme simplicity, just a single cell with 2 wires attached. There would be no issues with cells becoming out of balance. No BMS needed. Very simple charging. No pack needing to be assembled with it's various connections. Extremely safe to touch voltage. You could also potentially get some benefit in energy density due to the lack of packaging and spacing.
For a 1kw motor, would need around 275 amps (with lithium ion) which would be quite thick wire but could be done. Obviously the motor would have to be designed a little differently with this in mind. The cell would have to be huge and nobody is currently making cells like this. I'm assuming a controller could be designed for this voltage, but I'm really not sure. You would need specially designed chargers etc.
So while i understand it's not practical or convenient at this time, does it sound like a good idea in theory? It would require a totally clean sheet vertically integrated approach (Apple or Tesla like approach, and probably price tag). So I doubt it will happen any time soon if ever, but just an idea I've thought about.