Submitted by blackscraper on May 30, 2011
There are two major technical obstacles with electric cars. first, energy density. Tesla has resolved this problem, if not fully, by outstanding engineering and also thanks to the advance in battery technology.
Second, battery uniformity. No manufacture can guarantee the batteries are uniform when produced. This means, each of the thousands batteries hosted in Model S body will behave differently in daily usage. This situation will worsen as time goes on. this might also cause some safety issues in the long run, since un-uniform batteries will heat up pretty quickly and thus might explode. I know Tesla has some patents in battery controlling system, which is supposed to alleviate the problem. I'd be most appreciated if I can have some details on this.