Interesting
If this works it would make electric cars as convenient as petrol / diesel models. There are a number of problems to overcome. How, as Chris Morely asks, do you determine the cost of a recharge? I assume that it will be possible to pass the out-flowing electrolyte through a sampling cell in the pump to determine its "charge" and combine this with the actual volume to be replaced (different cars will have different capacities and *all* the electrolyte will need replacing irrespective of the remaining charge) to calculate the cost.
Another problem would be how to recharge the electrolyte given that it will be extracted from different vehicles in different states of charge. Can it all be mixed together? I assume there will need to be (at least) 3 forecourt "tanks". One to receive discharged electrolyte, one to hold electrolyte being charged and one to hold fully charged electrolyte for delivery. These could be rotated as each batch is charged.
The problem with the li-titanate "fast charge" is that, irrespective of the ability of the battery to *absorb* the charge, the "pump" must be able to deliver it, and safely. Very high currents and very high voltages in the hands of Joe Sixpack......?