This has been discussed for cars, trucks and forklifts etc. but no one has been able to make it work as yet, as the battery is such a large element in the cost of the vehicle and is normally not easy to remove.Is like having two battery powered drills? one in use and one on the charger Hmmmm?
There is a very interesting 3 page article in the February 2021 Tramways and Urban Transit that is well worth a read if you can get to see a copy. Points out that EU has published a 30 year Hydrogen strategy in July 2020 all to be produced from renewable solar and wind, makes our little efforts pale into significance. But perhaps we may get there some time.Electric cars with onboard photocell tech will develop commercially, (there has already been photocell cars for years), to have the upper surfaces covered in high efficiency photocells to give trickle charging while you drive or park up and they will probably be made to look prettier too.
Meanwhile there will be the continuing roll out of fast chargers (compatible for a few years with the need for older cars with slower battery charging requirements), to specific sites like on motorways and just outside city centres but due to the fast pace of change in battery technology and speed of charge, it is a brave company that invests in charging sites before a consensus in battery tech is established (charging wise).
Hybrid cars have two 'interesting' fire scenarios on board in an accident.
Not only is there double the risk of something untoward happening, fire wise, in a major shunt (also with a possible combination of the two power sources), I feel for the emergency services who have to tread even more carefully when dealing with the scenario.
Hydrogen cells will also increase with ordinary consumers especially with the production of safe home or commercially sited catalytic converters generating the hydrogen.
Meanwhile trains, buses and trucks will be the first to take hydrogen up on a widespread basis as it is easier to have the hydrogen delivered ton bulk to central hubs and the vehicles have the space on board for storage for the amount required for long journeys. Of course there will be need for hydrogen stops on motorways and main arterial routes
We are looking at a few years before we see the need for fossil fuels decrease as, although the government has given a year when new fossil fuel cars will not be made anymore, there are so many vehicles on the road already that need those fuels.
The cost for electric cars especially the larger ones for families, those who live in the country and need 4x4, and those who travel widely (not at the moment of course!) is going to stay high, for a few years yet, due to the cost of the batteries themselves.
People at the lower and lower-middle income thresholds tend to buy second hand cars, due to their cheapness, and those cars have maybe done a good few miles so that will have to be factored in to future transport plans.
Let's hope it doesn't become an elitist society with only those who can afford electric cars have the privilege to have a vehicle and everyone else has to use public transport..or maybe that is the way that the world will have to go for some time (much like when the first cars were introduced and it took Henry Ford to bring cars to the masses).
There is one other elephant in the room concerning batteries... replacement.
At the moment an electric car (or hybrid) battery has about ten years of life depending on how it is used and how it is 'looked after'.
The refit costs a pretty penny so if you buy a second hand electric/hybrid car (after it has been owned for let's say 7 years) you are possibly looking at a big bill on the horizon. Again this will affect the lower middle to lower paid...
For electric cars to become the replacement for our fossil fuel jalopies all aspects of owner ship, rental, lease purchase, battery replacement etc etc will have to be sorted.