Korea's three battery makers — LG Energy Solution, Samsung SDI, and SK On — collectively hold approximately 25% of the global EV battery market by capacity. LG Energy Solution is the largest, supplying GM (Ultium), Tesla (cylindrical cells), Hyundai, and Volkswagen. Samsung SDI partners with BMW and Rivian. SK On supplies Ford and Hyundai. Combined, they operate gigafactories across three continents.
Korean battery companies compete on chemistry innovation (high-nickel NMC, silicon-carbon anodes), safety engineering, and manufacturing consistency rather than raw scale (where CATL dominates). LG Energy Solution's proprietary NCMA (nickel-cobalt-manganese-aluminum) chemistry and Samsung SDI's Gen 6 cylindrical cells represent genuine technical differentiators that command premium pricing.
The US Inflation Reduction Act's battery manufacturing incentives have triggered massive Korean investment in US factories — LG, Samsung SDI, and SK On have committed over $30B to US gigafactory construction. This geographic diversification reduces dependence on Korean domestic production and positions Korean battery makers as key beneficiaries of the US-China decoupling in clean energy supply chains.