The BlueOval SK plant, owned by a partnership of South Korea's SK On and Ford, is the latest battery battleground for the union.

The Kentucky autoworkers, who want to join the United Auto Workers, filed for a union election Tuesday, a key development in the union’s campaign to organize Southern auto-factories and EV battery facilities.

The UAW union has petitioned the National Labor Relations Board (NLRB) to hold an election at the BlueOval SK battery plant in Kentucky.

Workers at a Ford Motor Co. joint-venture battery plant in Kentucky have formally asked the federal government to hold a vote on joining the United Auto Workers, the union said.

Workers at a Kentucky BlueOval SK Battery Park filed for an election to join the United Auto Workers union Tuesday, marking the new year’s first major union election petition filed in the South —and one that could foretell future union activity in Tennessee.