Volkswagen's top researcher warned Saturday that pure electric cars would not became a major product for decades, because they continue to be thwarted by battery technology.
Juergen Leohold, chief research officer at Volkswagen Group, said the key problems were gaining adequate range, the huge cost and a lack of industrial capacity to make high-energy batteries.
In an interview with Deutsche Presse-Agentur dpa in Wolfsburg, he deflated predictions that millions of people would be driving electric cars by the middle of the 2010s as "very optimistic."
Leohold said Volkswagen would sell electric models, but cautioned, "It will take 20 to 25 years before electric cars achieve a market share of more than 10 per cent." Volkswagen's first electric car would be a small car due out in 2010, but bigger ones might follow.
"We have an ambition to electrify more than just the really small cars, but also our main model series, the Golf," he said.
Leohold said research into lithium-ion batteries had made big jumps, but the items were still far too expensive.
He said electric motors would never replace internal-combustion engines in some sectors, such as long-distance heavy trucks.
“At the moment it is inconceivable they could ever be powered by batteries," he said, adding that there was still major potential to make petrol and diesel engines more efficient.