In a bold move to address safety concerns in the energy storage industry, Sungrow, a leading provider of renewable energy solutions, recently conducted a groundbreaking live fire test of its PowerTitan energy storage system. The test, which was streamed to industry stakeholders, demonstrated the company's commitment to transparency and safety in an increasingly critical sector of the renewable energy market.
On May 23, at a third-party lab in China's Henan Province, Sungrow intentionally set ablaze a full-size 20ft standalone PowerTitan Battery Energy Storage System (BESS). The test, involving four of Sungrow's PowerTitan 2.752MWh integrated battery systems, was designed to simulate a real energy storage plant scenario and assess the system's ability to contain thermal runaway without external fire control measures.
"This elevates our commitment to industry safety and transparency in commerce to a level few have achieved," said Hank Wang, President of Sungrow Americas.
The results were impressive. During the test, explosion relief panels at the top of the unit activated automatically, venting the fire upward and preventing its spread to adjacent battery cabins and energy storage units. This successful demonstration of the PowerTitan's fire safety capabilities at both the BLOCK and station control levels marks a significant milestone in battery energy storage safety.
Mandy Zhang, Product Manager for the Overseas Region - Energy Storage BU at Sungrow, detailed the system's safety features in a follow-up interview with E+E Leader, noting that the PowerTitan's impressive performance during the fire test can be attributed to several key design elements. Zhang highlights the four main aspects:
"The main aspects are fourfold," Zhang explained. "First is the compartment design: we have reasonably separated the electrical compartment, liquid cooling unit compartment, and battery compartment. Additionally, the battery capacity of each individual fire-resistant compartment is also divided, which effectively reduces the fire load of a single battery compartment and increases multiple layers of fireproof walls that can effectively hinder fire spread."
Zhang continued, "Second is the fire resistance level of the compartment structure itself, which can control the fire within a limited range. Third is the use of flame-retardant and fire-resistant materials inside the battery compartment, with a maximum temperature resistance of over 1400°C. These materials effectively isolate and conduct heat, continuously preventing flames during a 4-hour burn."
The final crucial element is the system's explosion relief design. "In the event of an explosion, the explosion relief panels on top of the energy storage cabinet promptly sense the explosion, effectively protecting the structural integrity of the energy storage cabinet and preventing components from flying out and causing mechanical damage to surrounding personnel and equipment," Zhang concluded.
"The overall design of the PowerTitan system container complies with the strictest existing fire protection design requirements, meeting standards such as NFPA855, UL9540A, NFPA68, and NFPA69," Zhang stated.
She further explained, "We have added two safety features. First, we have included an arc detection function to eliminate the source of fires. Second, we have enhanced the fire resistance of the battery modules and container materials to ensure that, even in the event of a fire, it will not spread."
The energy storage industry has faced scrutiny over potential fire risks associated with lithium-ion batteries. Sungrow's test directly addresses these concerns, potentially paving the way for wider adoption of utility-scale storage systems.
"By ensuring the highest safety standards, Sungrow's technology abates safety concerns and helps encourage the adoption of utility-scale storage systems throughout the energy industry," Wang noted.
As the renewable energy sector continues to grow, the demand for safe and reliable energy storage solutions is expected to increase. Sungrow's successful demonstration of the PowerTitan's safety features positions the company at the forefront of this evolving market.
Zhang concluded by emphasizing Sungrow's ongoing commitment to safety innovation: "Moving forward, we will further optimize structural designs to ensure more robust safety guarantees. We also aim to lead the industry in enhancing energy storage safety through technological innovation, design optimization, and more precise and comprehensive safety monitoring."
