SoftBank Osaka Battery Production Targets AI Data Centre Energy Demand

SoftBank

SoftBank Osaka battery production plans will add a new Japanese platform for next-generation battery cells and battery energy storage systems. The company aims to start production at its GX Factory in Osaka by March 2028.

SoftBank Osaka battery production will focus partly on zinc-halogen battery technology developed with South Korea’s COSMOS Lab. The partners aim to begin mass production during the April 2027-March 2028 fiscal year.

SoftBank Osaka battery production is strategically linked to rising electricity demand from artificial intelligence infrastructure. As AI data centres expand, operators need safer, scalable and more resilient energy storage systems to support grid stability and power management.

The GX Factory is part of SoftBank’s planned AI data centre development at Sakai in Osaka prefecture, on a site formerly owned by Sharp. The wider project also includes the AX Factory, which will focus on AI data centre operations and infrastructure hardware manufacturing.

Zinc-Halogen Technology Targets Safety and Local Supply

SoftBank is positioning zinc-halogen batteries as a safer alternative to lithium-ion systems. The company said the technology removes lithium-ion fire risk by using a halogen-based cathode material, zinc anode and water-based electrolyte.

This chemistry also supports supply-chain resilience. Zinc and halides are available in Japan, reducing exposure to imported lithium, nickel, cobalt or graphite supply chains.

That matters because energy storage is becoming more strategically important as AI data centres, renewable power and grid balancing needs grow together. Battery systems must be safe, affordable and scalable.

Zinc-halogen batteries may be especially relevant for stationary storage, where safety, durability and material availability can matter more than maximum energy density.

SoftBank’s plan shows that AI infrastructure is beginning to shape battery demand beyond electric vehicles. Data centres require large and reliable power systems, and that could create a new demand channel for non-lithium battery chemistries.

BESS Manufacturing Adds Industrial Scale Ambition

SoftBank will also partner with South Korea’s DeltaX to develop and manufacture high-energy-density battery energy storage systems. The partnership will use DeltaX’s cell-connecting system design and cell-to-pack technology.

SoftBank aims to reach 1 GWh/yr of BESS mass production by the 2028-29 fiscal year. That would give the company a meaningful platform for grid, industrial and data-centre storage customers.

The company plans to expand sales into grid-storage, industrial and residential applications. It is also considering overseas markets in the medium term.

SoftBank wants the battery business to generate more than ¥100bn in annual revenue by the 2030-31 fiscal year. That target shows the company sees batteries as an infrastructure business, not only a technology experiment.

For Japan, the project strengthens domestic battery manufacturing around AI infrastructure and energy security. It also diversifies battery chemistry development beyond the lithium-ion supply chain.

The industrial implication is clear. As AI power demand accelerates, battery storage will become a strategic layer between data centres, grids and renewable energy supply.

The Metalnomist Commentary

SoftBank’s Osaka plan shows that AI infrastructure is now pulling battery innovation in a new direction. Zinc-halogen technology may not replace lithium-ion in vehicles, but it could become strategically important for safer, locally sourced stationary storage.