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Geely Galaxy TT passes 24-hour thermal runaway test with no smoke in cabin

Geely's Galaxy TT sedan completed a 24-hour battery thermal runaway test with a real engineer inside, achieving no fire, no explosion and no toxic smoke entering the cabin, thanks to its NP3.0 protection technology developed with CATL.

Geely's Galaxy TT electric sedan has passed an extreme battery safety test that went beyond China's upcoming national standard, according to Chinese outlet 电动邦 (Dian Dong Bang). The test, conducted at the National Vehicle Testing and Research Center's fire safety laboratory, involved a real engineer sitting in the car while a battery cell was deliberately triggered into thermal runaway. The result: no fire, no explosion, and no visible smoke or toxic fumes inside the cabin.

Stricter than the national standard

The test was designed to be tougher than the new GB 38031-2025 standard, which takes effect on July 1, 2026 and requires batteries to not catch fire or explode after thermal runaway. Instead of the traditional bottom-fire test, the team used an internal trigger device to ignite a cell from within, bypassing the battery pack's outer protections. The test followed the China Electric Vehicle Fire Safety Index (C-EVFI) 2026 protocol, which is more demanding than the national standard.

Conditions were pushed to extremes: an ambient temperature of 40°C, a cell temperature of 40°C, and a state of charge of 96%. While the national standard requires only two hours of observation after thermal runaway, Geely extended the monitoring to 24 hours. The battery pack showed no flame, no explosion, and no propagation to other cells.

The key technology is Geely's NP3.0 thermal runaway protection, developed jointly with battery maker CATL. When a cell overheats, high-temperature toxic gases are routed through a dedicated pressure-release channel into a multi-stage cooling and purification system, where they are cooled, filtered, and rendered harmless before being vented outside the car. The system also triggers alarms via the battery management system and a smartphone app, giving occupants ample time to exit.

Safety as standard, not an option

The Galaxy TT is built on Geely's GEA Evo architecture, with a body that uses nearly 80% high-strength steel and aviation-grade aluminum. The battery pack is secured with 26 mounting points and protected by a multi-layer composite cover, bulletproof-grade underbody, and reinforced side rails. The car comes with up to seven airbags, including a front center airbag to prevent occupant-to-occupant impact in a collision.

Active safety features include a 100Hz battery management system that can cut power in 10 milliseconds, plus AEB automatic emergency braking, a general obstacle avoidance system, and a tire blowout stability system. The safety warning algorithm has won a national award for accuracy exceeding 99.5%.

The Galaxy TT is a C-segment (midsize) AI-powered electric sedan with a pre-sale guide price of 145,900 to 169,900 yuan (about $20,500 to $23,900) in China, before taxes and incentives. All versions come standard with an 800V electrical architecture, a 16-in-1 electric drive, and 6C ultra-fast charging that can replenish from 10% to 80% in 11.6 minutes, adding over 400 km of range. The four-wheel-drive version accelerates from 0 to 100 km/h in 3.8 seconds, while the rear-drive version does it in 6.5 seconds.

Inside, the car features a Flyme Auto 2 infotainment system powered by a 4nm cockpit chip, a 23-speaker sound system, and a 110-liter front trunk. Two driver-assistance packages are offered, with the higher-tier version using an Nvidia Thor-U chip for advanced highway and city navigation.