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Chevy Volt Tweaks Battery Performance
General Motors Co. says changes in the battery system in the 2013 Chevrolet Volt have earned the extended-range hybrid slightly better range and fuel efficiency ratings from the U.S.
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General Motors Co. says changes in the battery system in the 2013 Chevrolet Volt have earned the extended-range hybrid slightly better range and fuel efficiency ratings from the U.S. Environmental Protection Agency.
Compared with the current model, next year's Volt will have an electric-only EPA range of 38 miles (up three miles), a miles-per-gallon-equivalent rating of 98 (up four miles) and an extended range of 380 miles (up five miles).
GM says the improvements came by tweaking the Volt's lithium-ion battery cell chemistry, adding 0.5 kWh of storage capacity and reducing the battery's automatic energy buffer by 0.5 kWh. The changes give the new battery system total storage capacity of 16.5 kWh and the ability to use 10.8 kWh of battery energy before the on-board engine/generator kicks in.
The revised cell chemistry results in less battery degradation and the ability to withstand temperatures as low as -30 C, according to GM. The company notes that recharging times will be about 30 minutes longer for the new battery when using a 120-volt source.
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