SoftBank Corp., the telecommunications arm of SoftBank Group, has partnered with South Korea’s Cosmos Lab and AI firm DeltaX Co. to establish a venture focused on building large-scale battery cells and storage systems for the Japanese market. This move comes amid rising electricity demand driven by the global AI boom, which is increasing power density requirements in data centers. Consequently, battery storage solutions are becoming essential to manage the load fluctuations and meet the surging energy needs associated with AI technologies.
Cosmos Lab: Cosmos Lab is a South Korean deep-tech startup founded in 2021 that develops advanced battery energy storage technologies aimed at global mass adoption, including zinc-halogen batteries. It specializes in solutions for high-demand applications like data centers. In the partnership, Cosmos Lab will work with SoftBank Corp. and DeltaX Co. to enable mass production of large-scale batteries starting next fiscal year.
DeltaX Co.: DeltaX Co. is a Seoul-based South Korean firm focused on cutting-edge AI solutions combining computer vision and intelligent systems. It provides technology for various applications including those requiring advanced processing. DeltaX Co. is partnering with SoftBank Corp. and Cosmos Lab to develop large-scale battery cells and storage systems tailored for AI hardware infrastructure.
SoftBank Corp.: SoftBank Corp. is the telecommunications arm of SoftBank Group, providing mobile, broadband, and related services in Japan. It recently shared financial results for the nine months ended December 2025 and is scheduling FY2025 earnings briefings in May 2026. SoftBank Corp. announced it will partner with Cosmos Lab and DeltaX Co. to produce large-scale battery cells and storage systems for the Japanese market amid AI-driven power needs.
SoftBank Group: SoftBank Group Corp. is a Japanese multinational holding company that manages investments in technology, AI, and group subsidiaries including telecommunications. It recently proposed board changes to strengthen governance ahead of its June 2026 annual general meeting and is preparing for FY2025 earnings briefings. In this news, SoftBank Group has launched a battery business through its telecom arm to capitalize on electricity demand from the global AI boom.
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{
“AI Power Demands”: “AI workloads are driving higher power density requirements and smaller footprints in data centers.”,
“Energy Storage Role”: “Battery storage is increasingly critical for managing demand spikes and load variations in data centers.”,
“Infrastructure Shift”: “Long-duration energy storage solutions are advancing to meet growing electricity needs fueled by AI expansion.”
}
`