EVALUATION OF EAI FAST-CHARGE ALGORITHM IN ELECTRIC SCOOTER CYCLING DUTY USING A HAWKER GENESIS ABSORPTIVE-GLASS-MAT BATTERY.

June, 2000

In an effort to reduce air pollution, the government of Taiwan has instituted a project to develop electric motor scooters to replace the 21 million internal combustion powered motor scooters currently in use on Taiwan. As part of this project, specifications for electric scooter batteries have been issued and performance standards set for battery life under simulated electric scooter cycling conditions. Electric Applications Inc (EAI) staff have conducted laboratory cycling of a Hawker Genesis® battery meeting the standard specification for an electric scooter battery. The battery was discharged using the simulated electric scooter discharge cycle (ECE-47) and charged using a fast charge algorithm developed by EAI staff specifically for small absorptive glass mat batteries such as those specified for electric motor scooter use. A single Hawker Genesis® 26 Ah module (21.5 Ah at C1) was cycled for 9,714 simulated electric scooter discharge cycles. The battery was charged using 400 EAI fast charge cycles with an average duration of 16.1 minutes (40 to 90% SOC). The battery delivered 5,133 Ah, the equivalent of 7,771 km of electric motor scooter use. At the end of cycling, the battery capacity was 77% of its initial nominal (Ca) capacity.

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