Introduction
On Thursday, May 22, 2025, a fire broke out at the Digital Realty data center located in Hillsboro, Oregon. The incident prompted a significant emergency response and raised concerns about the safety of Battery Energy Storage Systems (BESS) in critical infrastructure.
Why does this matter?
As data centers expand and power more of the global digital economy, their energy demands continue to climb. To meet those demands, many rely on BESS, particularly lithium-ion systems, for backup power and grid stability.
But here’s the hard truth: without the right safety measures, these systems can become a source of risk, not resilience.
Incident Recap
Details of the Fire
Fire crews were dispatched at 10:20 am after receiving reports of a fire at the Digital Realty data center in Hillsboro. When they arrived, they found that the fire had originated in the battery room and was contained to that space. Despite being confined to a single room, the smoke was extremely dense, spreading throughout the building and making visibility inside the facility dangerously low.
Emergency Response
The fire continued to burn for nearly five hours, with crews officially declaring it extinguished at 3:30 p.m. Firefighters employed a defensive approach, allowing the batteries to burn out on their own while working to prevent the fire from extending to other parts of the site. Thankfully, all personnel were safely evacuated, and no injuries were reported.
Current Status
The exact cause of the fire remains under investigation, with officials examining whether system malfunctions, battery failures, or other underlying factors played a role. While some reports have noted that the facility is leased by a high-profile social media platform, this detail has not been officially confirmed by local sources. As of now, Digital Realty, the site’s operator, has been contacted for comment but has not released a public statement.
Lithium-Ion Battery Storage Risks
Core Hazards
To understand why this happened, let’s unpack the inherent dangers of conventional lithium-ion battery storage systems.
- Thermal Runaway: When one battery cell overheats, it can trigger neighboring cells in a rapid chain reaction, making the fire virtually unstoppable.
- Toxic Smoke and Gas: Lithium-ion fires release hazardous vapors, such as hydrogen fluoride, that pose severe risks to first responders and nearby residents.
- Design Vulnerabilities: Many existing battery rooms lack proper containment and cooling systems, leaving them highly vulnerable to catastrophic failures.
Broader Context
Sadly, Hillsboro is not an isolated case.
Remember the Moss Landing incident in California? Or the McMicken explosion in Arizona? Both were high-profile BESS failures that exposed the dangers of relying on outdated storage technologies.
And as data centers scale up to meet the growing energy demands of our digital world, these risks will only intensify without the adoption of safer, smarter solutions.
Moving Toward Safer Alternatives: The Case for Immersion Cooling in BESS
With growing concern over battery safety, operators are looking for safer solutions. Immersion cooling offers a proven way to prevent fires and protect critical infrastructure.
How Immersion Cooling Prevents Battery Fires at the Source
So, what exactly is immersion cooling?
At its core, immersion cooling involves submerging battery cells directly in a stable, nonflammable dielectric fluid. This fluid serves two critical functions:
- It blocks oxygen exposure, removing the key ingredient for combustion.
- It actively draws heat away from battery cells, maintaining safe operating temperatures and preventing thermal runaway before it even starts.
In other words, immersion cooling doesn’t just respond to fires; it prevents them from ever igniting. That’s why it’s becoming a cornerstone technology for the next generation of BESS safety.
EticaAG’s Advanced Safety Approach
At EticaAG, we’ve engineered cutting-edge immersion-cooled BESS solutions designed to set new industry benchmarks for safety and performance.
Here’s what makes our approach stand out:
- Total Oxygen Isolation: Batteries are fully submerged, cutting off the oxygen supply that fuels fires.
- Active Thermal Management: Smart circulation systems move the dielectric fluid in real time, keeping temperatures under precise control.
- Anti-Propagation Module Design: Proprietary modules stop thermal or electrical failures from spreading system-wide.
- Reliable BMS and EMS Systems: We prioritize trusted, high-integrity management systems to ensure reliable monitoring, control, and system intelligence.
Together, these features deliver unparalleled safety, resilience, and peace of mind.
Comparative Advantages
Before diving into the specific benefits, it is important to understand why safer battery storage systems matter on a broader level. Data centers are complex ecosystems, and even small disruptions can trigger cascading effects such as service interruptions, financial losses, reputational harm, and safety risks.
Integrating advanced solutions like immersion-cooled BESS is not simply about upgrading equipment; it is about enhancing the overall stability, resilience, and sustainability of operations.
When evaluating battery storage options, operators must consider both technical performance and the long-term impacts on safety, cost, and environmental responsibility.
Why should data center operators care? Let’s break it down.
- Public and Facility Safety: Immersion cooling dramatically reduces the risk of fires or explosions, protecting employees, first responders, and surrounding communities.
- Operational Reliability: By preventing thermal events, operators can avoid downtime, outages, and devastating business disruptions.
- Cost Efficiency: Fewer emergency repairs, lower insurance premiums, and reduced maintenance translate into significant long-term savings.
- Environmental and Health Protections: By stopping fires at the source, immersion-cooled systems eliminate toxic smoke releases, safeguarding both people and the planet.
The Critical Role of Safety in Digital Infrastructure
Let’s zoom out.
In today’s hyperconnected world, data centers are mission-critical infrastructure. They power banking systems, healthcare networks, cloud platforms, government services, communications, and social media. When they go down, the ripple effects are global.
This is why battery safety is no longer optional; it’s essential. Without robust safety measures, we risk jeopardizing the digital backbone that modern society depends on.
By investing in technologies like EticaAG’s immersion-cooled BESS, operators can future-proof their infrastructure, protect public safety, and ensure resilience in the face of rising energy demands.
Looking Ahead
The Hillsboro data center fire serves as a critical reminder of the vulnerabilities present in today’s digital infrastructure. As global reliance on data centers continues to grow, so does the importance of addressing the risks posed by conventional battery storage systems.
Technologies like immersion-cooled BESS represent a meaningful step forward in improving safety, reliability, and long-term resilience. By reducing the risk of thermal runaway and limiting the potential for catastrophic failures, these systems offer a practical path for strengthening the foundations of modern digital operations.
Moving forward, stakeholders across the data center industry, from operators and engineers to policymakers, will need to carefully evaluate how advanced energy storage solutions can be integrated into their safety and risk management strategies. Ensuring infrastructure resilience is no longer just a technical challenge; it is a fundamental requirement for sustaining the digital services and platforms on which society depends.
