I would like to see electric cars adopt hybrid energy storage / generation systems. An advanced controller would direct electricity to and from each system based on which is considered best at handling the current situation. If one has failed, it would simply be cut out of usage. It might include batteries, a generator, capacitors, compressed air systems, etc. A system like this would:
- allow for characteristics that any one system doesn’t provide
- provide an alternative / backup for if any one system fails / degrades
- retain the simple, low maintenance drive system that an electric vehicle has