The invention enables improved and more efficient recharging of electric cars, by using improved batteries, improved recharger arrangements in electric cars, and infrastructures that are used for recharging electric cars, while also protecting the electric grid from overload. This is done for example by accumulating energy in service stations in special high speed capacitors, such as one or more super capacitors, or one or more molten salt accumulators, or other fast batteries which can be recharged to 80% capacity within 5 minutes. These accumulators can be used to recharge cars, since otherwise the service station would need to have a huge capacity power supply to enable such fast recharges. Other variations include efficient methods of recharging the batteries serially, either in the service station (based on a model of fast replacement of batteries at the service station), after automatically sorting the batteries into more or less homogenous groups, or in the car itself by automatically rerouting the batteries, or some of them, or elements in them, during recharge so that they are recharged more serially than during the normal operation of the car. This enables recharge with fewer rechargers at higher voltages and with less current and fewer problems of heat during recharge. Other improvements include a system wherein when recharging the electric cars, rechargers and central computers in the electrical grid company and in the service provider take into account car-specific parameters in order to optimize the recharging priorities, for example based on the state of their batteries and heuristics or statistics or automatic repeated identification of cars based on a unique digital ID number. The system can take into account also various regular or historical car-specific parameters or patterns or statistics, such as typical arrival and departure times, typical distances traveled, specific needs based on week days, etc. Other features include a system and method for alerting users when a parking and recharging post becomes available or reserving them in advance.
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