# Samsung SDI expands battery mother factory in Cheonan, South Korea

Samsung SDI is investing 9 trillion won to build a mother factory (central production base) for battery core technology development at its Cheonan site. Construction was completed in July 2025 and equipment installation began in November 2025.

- Type: Expansion
- Announced: 2026-11-12
- Where: Cheonan, South Chungcheong Province, South Korea
- Value: $6.77B (9000.0B KRW)
- Starts operating: Nov 2025
- Status: completed
- Products: battery core technology
- Sectors: [Automotive Components](https://endata.com/sectors/automotive-components.md)

## Companies

- [Samsung SDI](https://endata.com/companies/16013.md)

## Sources

- [businesspost.co.kr](https://www.businesspost.co.kr/BP?command=article_view&num=451834), 2026-11-12: "삼성SDI는 천안 사업장에 9조 원을 투자해 배터리 핵심 기술 개발을 위한 마더팩토리(중심 생산기지)를 구축한다"

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.