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To improve the service quality of its electric-vehicle (EV) fleet (≈500 vehicles) and master the behaviour of the valve-regulated lead/acid (VRLA) batteries, which power the major part of it, Electricité de France (EDF) has developed an on-board battery-management system. Information on the operating battery behaviour is given to the driver. Overdischarges can then be avoided. Rapid charging of VRLA...
A few hundred electric vehicles have been field tested by ‘Electricité de France’ for several years. Most of them are equipped with valve-regulated lead/acid batteries. It is well known that the battery is the weak element of electric vehicles. Analysis of operation problems during field tests and laboratory investigations has led to the consideration that this situation could be improved by the use...
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