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Korean Battery Makers Run at Half Capacity as Chinese Rivals Expand

Chinese rivals’ aggressive growth compels Korean makers to boost research spending during an EV demand slump

Overview

  • LG Energy Solution averaged 51.3 percent plant utilization in H1 2025 while Samsung SDI’s small-battery plants fell to 44 percent and SK On rebounded to 52.2 percent.
  • SNE Research data show CATL and BYD led global battery usage growth outside China, cutting the combined market share of LGES, Samsung SDI and SK On to 37.5 percent.
  • Samsung SDI invested 704.4 billion won in R&D (11.1 percent of sales), LG Energy Solution spent 620.4 billion won (5.2 percent of revenue) and SK On allocated 148 billion won (0.52 percent of sales) in the first half.
  • SK On’s U.S. plant ran at near full capacity supplying Hyundai’s local output while Samsung SDI’s Stellantis joint venture facility operated below 60 percent utilization.
  • LGES CEO Kim Dong-myung said global battery demand likely bottomed in H1 2025 with a market recovery anticipated as early as 2026.