Nippon Steel Corp. is seeking an injunction in Tokyo District Court against Toyota Motor Corp. to prevent the automaker from manufacturing and selling electric and hybrid vehicles that use a type of steel critical for the performance of motors.
The Japanese steelmaker is alleging an infringement of its patent relating to electrical steel sheets, seeking damages of around 20 billion yen ($177 million), according to a statement Thursday.
Electrical steel sheets are a type of high-grade steel with enhanced magnetic properties that help to limit energy loss. They’re widely used as “iron cores” for electric generators in power plants, electrical products, cars and even vibration motors in mobile phones.
Tatsuo Yoshida, a Bloomberg Intelligence analyst, said it’s extremely unusual for a domestic steel supplier to sue an automaker. Electrical steel sheets are a critical part of motors that have a significant impact on performance and efficiency, he said. “I’ve …