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DEVELOPMENT OF A MODULAR ELECTROCHEMICAL ENERGY STORAGE SYSTEM FOR ROAD ELECTRIC VEHICLES

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FIAT, ITALY AND ELEKTRONIKCENTRALEN, DENMARK DEVELOPED LEAD-ACID MODULES FOR A VAN WITH BATTERY TEMPERATURE CONTROL, CONTROLLED CHARGING AND A CENTRALIZED SYSTEM FOR ADDING BATTERY FLUID AND FOR COLLECTING GAS. THE MODULES PERFORMED WELL DURING A 6 MONTH PERIOD OF VEHICLE TESTING OVER A DISTANCE OF 2000 KM WITH 100 CHARGING-DISCHARGING CYCLES. THE ON BOARD CHARGER HAD AN EFFICIENCY OF 86 %; THE STORAGE EFFICIENCY OF THE BATTERIES WAS 83 %. THE OVERALL ENERGY CONSUMPTION WAS 330 WH/KM FOR A 1.7 TONNE VAN. THIS IS MUCH LOWER THAN THE CONSUMPTION OF A FIRST GENERATION OF ELECTRICAL VEHICLES WHICH RANGED FROM 500 TO 860 WH/KKM. THE HIGH CONSUMPTION WAS MAINLY DUE TO HEAVY OVERCHARGING AFTER SHORT RUNS. A CONTROLLED CHARGING IN RELATION TO MEASURED AH IS THUS ESSENTIAL.

CHARGING AT 50 HZ WOULD REQUIRE VERY HEAVY TRANSFORMERS. A HIGH FREQUENCY CHARGER OF 2 KW IS THEREFORE BEING DEVELOPED (ELEKTRONIKCENTRALEN, DENMARK) WHICH OPERATES AT 50 000 HZ AND REQUIRES SMALL AND LIGHT TRANSFORMERS. THIS WILL LEAD TO A WEIGHT REDUCTION FROM 30 TO 7 KG. ADDITIONAL ADVANTAGES ARE : GOOD REGULATION, HIGHER EFFICIENCY, LOW COST. THE DEVELOPMENT OF THIS HIGH FREQUENCY CHARGER WHICH WAS TO BE INSTALLED IN THE FIAT ELECTRICAL VANS, LEAD TO PROBLEMS WITH THE SWITCHING TRANSISTORS WHICH COULD NOT BE RESOLVED; THE PROJECT WAS STOPPED.

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Fiat
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Centro Ricerche Strada Torino 50
10043 ORBASSANO
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Letzte Aktualisierung: 24 November 1989

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Permalink: https://cordis.europa.eu/project/id/EE-E2-423/de

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