roon wrote: ↑
Sat Jul 07, 2018 6:34 pm
Downside would be geometric uniformity. Some standard, or set of standard, battery shapes would be required. Fuel suppliers don't have to deal with this because fuel is a liquid, and conforms to any size or shape of fuel tank. The equivalent would be an oil change shop needing to stock dozens or hundreds of oil filter sizes and shapes. If there was one, or a handful, of standard oil filter sizes, their supply chain, inventory, and purchasing would simplify and enable greater profit. Battery suppliers would face similar limitations unless auto manufacturers would agree to standardize the largest, heaviest, most expensive singular component of the EV.
Exactly - the unification of the battery across all manufactures isn't a reasonable thing to implement.
By the time you have standardized the mechanical interface, voltage and power specs, battery management systems, cooling fluid type, pressure and flow rate, maintenence plans, charging systems, thermal logic, electrical and electronic interfacing you will end up with a tiny block which fits in any car, costs a fortune, gives 50km of range, overheats when fitted to a sports car and massively compromises the vehicle architecture of any car it's designed around.
The killer though is the costs and logistics for the battery stations. Even a modest battery station would need an inventory of several hundred batteries which will cost millions. The electrical draw to charge them all at one likely cannot be supplied by the electrical infrastructure of any town - so they will either need to be delivered (doulbing or tripling the number of trucks on the road compared to fuel tankers) or they will need an on site generator which again is going to cost millions.
Then, after all that, once they figure out how to charge a battery in a reasonable time no-one will swap batteries anymore...