>>1282551Depends on battery type.
5A so-called "laptop" batteries are pretty safe. They just get hot and vent some smoke if you poke them with a nail, shorting internal layers.
High-discharge cells (10A+) will explode like firework, venting hot stuff through positive terminal.
Li-ion batteries don't use acid, they use organic solvent, like acetone of sort, which is flammable, and smells horrible, but it will burn fast, so biggest danger of high-discharge cell is white-hot went, but with proper battery placement it is not an issue.
In other words, li-ion batteries are safe, if used with proper protection circuit and battery management system.
Li-ion battery pack MUST have:
>Physical fuse>BMS, that will disconnect battery in case of overcurrent, overdischarge (<2.8V) of any cell, overcharge (>4.25V) of any cellGood Li-ion pack should have:
>Balancing circuit, that charges all cells to same voltage>Charge voltage per cell should be 4.0 - 4.1V, so regenerative braking will work from start, and won't cause problems.>>1282516Because it would cost nearly as much as electric motorcycle.
