• Secondary Battery R&D
Completion of secondary battery R&D center

Kumyang moves ahead

Success of 21700 cylindrical battery development
Based on the R&D center with researchers and experts in the battery industry who have been in business for a long time, Kumyang has successfully obtained commercial battery quality certifications (CB, LIN38.3, UL) with the production of the self-developed 21700 cylindrical battery in 2022 and the 5.0Ah battery for the 21700 EV in October 2023. The research achievements and technical experience gained during the R&D production process have resulted in a system that produces cylindrical batteries that charge faster, longer, safer and have lower production costs.
Success of 4695 cylindrical battery development
After planning the development goal of securing global competitiveness with 46 series cylindrical batteries and devoting day and night to research and development, we succeeded in developing the 4695 cylindrical batteries, the first in Korea, and finally unveiled it in March 2024, proving our superior technology and innovative development capabilities.
Successful mass production of single-crystalline cathode material.
World's first mass production of a dry production process for Ultra high Nickel (Ni > 97%) single crystalline cathode material. Innovative technology for single crystalline realization for all cathode material including NCM, NCA, NCMA, LMR, etc. SMLAB supply superior, cost-competitive single crystalline materials that comply with the high-quality standards of Kumyang's 21700 and 4695 batteries.

The result of creativity and innovative thinking
Kumyang’s Patents and Certifications
With the production of the 21700 battery, which was successfully developed through the efforts of researchers and technicians, Kumyang obtained SGS quality certification. The company then achieved another milestone by developing the 4695 cylindrical battery, known as the dream secondary battery, for the first time in South Korea, along with international battery safety certification, the United Nations Transport of Dangerous Goods Tests and Standards, and U.S. Lithium Battery Safety Standards (UL Solution) certification.
Quality certification

ISO 14001

ISO 9001

ISO 45001

UL1642

CB

UN 38.3

IATF16949

Core Patent

Cathode Collector

Anode Collector

Cylindrical battery manufacturing apparatus and method(1)

Cylindrical battery manufacturing apparatus and method(2)

Secondary battery with improved moisture resistance