Samsung SDI said Tuesday that its battery system for uninterruptible power supplies (UPS) has passed a fire safety test conducted by global safety certification organization UL Solutions, a milestone expected to boost its competitiveness in the expanding artificial intelligence data center market. The South Korean battery maker said its UPS battery system met all evaluation criteria in UL Solutions’ Indoor Large-Scale Fire Test, or Indoor LSFT, which assesses whether fire spreads to adjacent battery racks after a battery module is deliberately ignited and forced into a thermal runway. During the test, the battery module was burned, but the flames did not spread to nearby racks; no gas was released and no explosions or ruptures occurred. The fire also extinguished itself without the activation of overhead sprinklers. Samsung SDI said it was the first battery manufacturer globally to officially pass the test since UL Solutions introduced the assessment this year. The company attributed the result to its proprietary thermal propagation prevention design and prismatic battery technologies using lithium manganese oxide materials and aluminum casings.