Xiaomi SU7 Ultra Fire in Nanchang: Battery Fire Ruled Out
A Xiaomi SU7 Ultra electric vehicle burst into flames on Yingxiong Bridge in Nanchang, Jiangxi Province, on June 7, while driving under normal conditions with no collision involved. The fire was brought under control by firefighters, and no casualties were reported, according to The Paper.
Xiaomi’s Swift Response
Xiaomi’s official spokesperson issued a statement on Weibo on June 8, approximately 24 hours after the incident, confirming that the company had contacted the vehicle owner and reported the situation to regulatory authorities. The company stated that based on on-site investigation and backend telemetry data analysis, the vehicle’s power battery was operating normally throughout the incident with no thermal runaway signals detected, preliminarily ruling out battery self-ignition as the cause.
“The situation has been reported to regulatory authorities. Based on on-site investigation and backend data analysis, the vehicle’s power battery was in normal working condition throughout the entire period before the incident, with no thermal runaway signals detected. Battery self-ignition has been preliminarily ruled out as the cause,” the statement read. The company added that the specific cause awaits confirmation from the fire department’s formal investigation.
A Vehicle Ablaze Without Impact
Witnesses reported that the vehicle was driving normally with no collision when it suddenly caught fire. “This car wasn’t in any collision with another vehicle; it just burned alone on the bridge,” one witness told NetEase News. The fire quickly engulfed the vehicle, producing thick smoke visible across the bridge before firefighters arrived to extinguish the blaze.
The incident has drawn intense public scrutiny, coming just over a year after Xiaomi’s high-profile entry into the electric vehicle market and following a devastating March 2025 crash involving an SU7 Standard Edition that killed three people.
Battery Technology Under the Spotlight
The Xiaomi SU7 Ultra is the company’s flagship performance EV, priced from approximately ¥529,900 ($73,000) and featuring 1,548 horsepower. It is equipped with CATL’s advanced Kirin II battery pack, which passed extreme safety tests conducted by the China Automotive Technology and Research Center (CATARC) in March 2025 — just three months before the Nanchang fire. Those tests included simulated underbody scraping, wading, and high-speed collision scenarios, all of which the battery system passed without failure.
Public Reaction and Industry Implications
Public reaction has been sharply divided. Some observers immediately attributed the fire to quality issues, while others urged restraint pending the official investigation. As Leikeji noted in its analysis, “No automaker can achieve 100% zero defects. Car manufacturing is inherently a process of continuous optimization and improvement. Rather than covering up or avoiding issues after an incident, transparency and proactive response are the attitudes consumers most want to see.”
Electric vehicle fires are an especially sensitive topic in China, where EV adoption has surged dramatically. Any fire involving an EV — regardless of its cause — triggers widespread public concern and media scrutiny. The term “spontaneous combustion” is frequently used by the public regardless of the actual cause, creating significant reputational challenges for automakers.
A Critical Test for Xiaomi’s Automotive Ambitions
This incident represents a significant test for Xiaomi’s young automotive division. The company’s rapid and transparent response — issuing a detailed statement with specific data points within 24 hours — marks a notable improvement over its handling of the March 2025 Tongling tragedy, where the company faced criticism for slow communication with victims’ families.
However, the fundamental question remains unanswered: what caused a non-collision vehicle fire? The fire department’s ongoing investigation will be crucial in determining both the specific cause and the broader implications for Xiaomi’s automotive ambitions. Until then, the incident serves as a stark reminder of the intense public scrutiny facing every EV manufacturer in China’s rapidly electrifying automotive landscape.
What to Watch For
The fire department’s formal investigation findings will be the next critical milestone. Depending on the outcome, Xiaomi could face questions about vehicle design, component quality, or potential product liability claims. The incident may also accelerate regulatory discussions around EV fire safety standards in China, where previous incidents have already prompted stricter battery safety requirements.