Nio advances in-house cylindrical cells with limited year-end output via Eve Energy, Gotion
Summary
Nio is pressing ahead with its in-house large cylindrical battery cells, with a very small batch expected to roll off production lines by year-end through contract manufacturing by Eve Energy and Gotion. The company is retaining core battery R&D while expanding CATL prismatic battery purchases across its Onvo and Firefly brands, though mass production remains challenging near term.

- Eve Energy and Gotion will reportedly handle contract manufacturing, but mass production remains challenging in the near term.
- Nio is retaining in-house cell development while expanding the use of CATL batteries across its brands.
Nio Inc (NYSE: NIO) is pressing ahead with its in-house large cylindrical batteries, with a very small batch of cells expected to roll off production lines by year-end, marking progress for a project that has faced repeated delays.
The cells will be manufactured by Eve Energy (SZSE: 300014) and Gotion High-tech (SZSE: 002074), though mass production remains difficult in the near term, battery industry media outlet Jipian Lab reported on Monday.
Nio is also increasing its purchases of prismatic batteries from CATL (HKEX: 3750), with its Onvo and Firefly brands both now using the supplier's batteries, the report noted.
The arrangement continues Nio's strategy of retaining core battery research and development while outsourcing manufacturing, advancing its own technology while relying on external suppliers to support vehicle deliveries.
Nio founder, chairman and CEO William Li said in a media interview in September that the company had invested more than 2 billion yuan ($298 million) in battery research and development, Jipian Lab noted.
Li said at the time that Nio continued to invest heavily, focusing its in-house development on long-life large cylindrical cells under a model combining internal R&D with contract manufacturing.
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