VW's Seat says Spain needs a battery plant Reuters Seat's Martorell plant near Barcelona could soon be building a small EV. BARCELONA -- Volkswagen Group's Spanish unit, Seat, called on the Spanish government to promote local battery production for electric cars, which the automaker could potentially start manufacturing in Spain in 2025. Seat is in "advanced conversations" with the government on whether to start producing a small electric vehicle at its Martorell plant near Barcelona, Chairman Wayne Griffiths told a news briefing on Monday, adding that an announcement should be expected in th...