Reuters: A partnership between Johnson Controls Inc and France’s Saft will supply a complete battery system for Ford Motor Co’s first plug-in hybrid, due out in 2012, Ford said on Tuesday. Ford also said ahead of the Washington Auto Show that seven utilities, including Consolidated Edison Inc, American Electric Power Co and Michigan’s DTE Energy Co, will join its ongoing research effort to test rechargeable plug-ins and assess their impact on the electrical grid. Ford has not identified …