The country's antitrust regulator is investigating the effects on the market of Chinese miner Tianqi Lithium acquisition of a 24% stake in SQM, the world's second largest lithium producer,
The battery cell maker is working on the first section of the factory, in Skellefteå in the north of Sweden, which will be completed in 2020 and produce eight gigawatt cell capacity per year.
SQM has retained former chairman Julio Ponce as an adviser despite an agreement to distance himself from the firm to end a long-running royalties dispute.