The fire occurred at a waste depository, not a production facility, Shin said.
Pictures that were circulated on social media, showed plumes of black smoke rising into the air from what users described as a plant operated by the affiliate of Samsung Electronics Co. in Tianjin.
The fire didn’t affect production, spokesman Shin Yong-doo said on Wednesday.
Samsung SDI was one of two battery suppliers for the Note 7 smartphones, which was eventually killed off after a global recall. Samsung Electronics this month completed a probe into the device and cited flaws in battery manufacturing and design for the fiasco.
SDI said this month is has invested about 150 billion won ($129 million) in safety and that its batteries will probably be used in Samsung Electronics’ next smartphone model.