SK On announced on January 8 that it will showcase a "CTP Integrated Package Solution" at InterBattery 2026, held at COEX in Seoul's Gangnam district from January 11-13. The solution combines cell-to-pack (CTP) technology with immersion cooling fluid technology from SK Enmove, the company's in-house independent subsidiary (CIC). The move signals SK On's strategy to expand its product portfolio from supplying individual battery cells and modules to complete pack units.
Under the theme "Unlock the Next Energy," SK On will present CTP packages including pouch CTP, pouch-integrated prismatic packs, and large-surface cooling (LSC) CTP, along with CMP packages comprising cells, modules, and packs.
The pouch CTP eliminates modules by integrating cells directly into packs, increasing energy density while reducing manufacturing costs compared to conventional systems. Thermal propagation blocking technology prevents defects in individual cells from spreading to adjacent cells. Product verification at the battery pack level was completed last year, targeting commercial production in 2027. This year, the company plans to establish pilot lines at major overseas production sites for global automakers and secure mass production systems.
The pouch-integrated prismatic pack features mid-nickel pouch cells directly encased in rigid aluminum prismatic cases. By eliminating modules, the design reduces components and processes while enhancing safety against external impacts. The design flexibility inherent in pouch cells enables various cell and pack configurations, promising effective customized development for customers. Commercial production is planned for 2028.
The LSC CTP directly bonds aluminum cooling plates across the entire contact surface between arranged pouch cells, maximizing thermal management efficiency while reducing insulation material usage. Cooling performance improves up to three times compared to conventional indirect cooling methods applied to narrow areas at the bottom of pouch cells. Product verification at the module level was completed last year, with commercial production also targeted for 2028.
SK On will also introduce immersion cooling pack prototypes incorporating immersion cooling fluid technology being co-developed with SK Enmove. Two versions are available based on pouch CTP and CMP platforms. Immersion cooling technology is considered a promising future technology for enhancing battery cell stability by circulating insulating fluid directly inside packs to maintain constant battery temperatures. The technology excels in thermal management and can maintain battery cell performance and lifespan even in extreme cold or hot external environments.
An SK On official said, "This exhibition marks the first unveiling of SK On's proprietary CTP integrated package solution." The official added, "SK On plans to continue expanding its battery product portfolio based on technological synergies with SK Enmove, including immersion cooling technology."
