{"id":157218,"date":"2026-10-28T08:00:00","date_gmt":"2026-10-27T23:00:00","guid":{"rendered":"https:\/\/askinno.com\/global\/?p=157218"},"modified":"2026-10-28T10:05:22","modified_gmt":"2026-10-28T01:05:22","slug":"on-demonstrates-ess-fire-safety-in-large-scale-fire-test","status":"publish","type":"post","link":"https:\/\/askinno.com\/global\/archives\/157218","title":{"rendered":"SK On Demonstrates ESS Fire Safety in Large-Scale Fire Test"},"content":{"rendered":"\n

\u25a0<\/strong> SK On\u2019s ESS meets UL criteria for large-scale fire testing<\/strong><\/p>\n\n\n\n

\u25a0<\/strong> No thermal runaway observed in adjacent container during testing<\/strong><\/p>\n\n\n\n

\u25a0 SK On to accelerate global ESS market expansion following successful test<\/strong><\/p>\n\n\n\n

SK On, a leading global battery manufacturer, announced that its energy storage system (ESS) met UL 9540A evaluation criteria in a large-scale fire test.<\/p>\n\n\n\n

UL 9540A is a widely recognized North American test standard for evaluating fire and heat propagation during battery thermal runaway events.<\/p>\n\n\n\n

The large-scale fire test (LSFT) simulates real-world ESS fire scenarios to assess the risk of fire spreading to adjacent containers. In March 2026, the testing requirements were strengthened to introduce more clearly defined criteria for evaluating fire propagation.<\/p>\n\n\n\n

During the test, no thermal runaway was observed in the battery cells of the adjacent container. Temperature measurements inside the container also met the applicable evaluation criteria.<\/p>\n\n\n\n

SK On attributed the results to its ESS design, which allows heat to dissipate gradually over an extended period. This helps prevent sharp increases in heat release rates and reduces the risk of fire spreading to neighboring containers.<\/p>\n\n\n\n

SK On plans to accelerate its expansion in the global ESS market following the successful test.<\/p>\n\n\n\n

In August, the company signed an agreement to supply lithium iron phosphate (LFP) batteries to U.S.-based ESS provider NeoVolta Power. In September 2025, SK On also signed a 1-gigawatt-hour (GWh) ESS supply agreement with U.S. renewable energy company Flatiron.<\/p>\n\n\n\n

SK On is also expanding its presence in the South Korean ESS market. In February, the company secured 284 megawatts (MW) of ESS capacity, accounting for more than half of the 565 MW awarded in South Korea\u2019s second round of competitive bidding for ESS projects.<\/p>\n\n\n\n

The company is currently converting 3 GWh of its existing 7 GWh production capacity at its Seosan plant in South Korea into dedicated LFP battery production lines for ESS applications.<\/p>\n\n\n\n

\u201cThis test confirmed the fire safety of SK On\u2019s ESS, demonstrating its ability to limit fire propagation and maintain key safety performance under simulated fire conditions,\u201d an SK On spokesperson said. \u201cWe will continue to enhance our safety technologies and product competitiveness to provide customized ESS solutions and expand our presence in the global market.\u201d<\/p>\n\n\n\n

[Photo]<\/strong> SK On\u2019s containerized energy storage system (ESS) showcased at InterBattery 2026, held at COEX in Gangnam-gu, Seoul, in March.<\/p>\n\n\n\n

\"[Photo]<\/figure>\n","protected":false},"excerpt":{"rendered":"

\u25a0 SK On\u2019s ESS meets UL criteria for large-scale fire testing \u25a0 No thermal runaway observed in adjacent container during testing \u25a0 SK On to accelerate global ESS market expansion following successful test SK On, a leading global battery manufacturer, announced that its energy storage system (ESS) met UL 9540A evaluation criteria in a large-scale … Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":157219,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1914,1916,1915],"tags":[1918,35,1936,105,1385,2115,2116,648,2114],"class_list":["post-157218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-presspress","category-corporate-news","category-press-releases","tag-batteriesmaterials","tag-battery","tag-bess","tag-ess","tag-lfp","tag-lsft","tag-safety-technologies","tag-sk-on","tag-ul9540a"],"acf":[],"_links":{"self":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts\/157218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/comments?post=157218"}],"version-history":[{"count":4,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts\/157218\/revisions"}],"predecessor-version":[{"id":157227,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/posts\/157218\/revisions\/157227"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/media\/157219"}],"wp:attachment":[{"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/media?parent=157218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/categories?post=157218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/askinno.com\/global\/wp-json\/wp\/v2\/tags?post=157218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}