In a bold demonstration of electric vehicle battery safety, Geely’s Galaxy E5 has successfully passed an extreme compression test in which its “Aegis Gold Brick Battery” withstood the crushing weight of a 36-ton ZTZ-59D medium tank—without any signs of fire, explosion, or thermal runaway.
The test simulated a catastrophic external impact scenario, far exceeding routine safety requirements. According to Geely, the pressure applied was approximately 1.8 times higher than China’s upcoming national safety standards for electric vehicle batteries. The battery pack was run over repeatedly by the tank’s treads, including tests on individual battery cells and a group of ten cells. Despite the immense force, the battery remained structurally intact with no bulging, leakage, fire, or explosion.
New National Standards Set for 2026
China’s Ministry of Industry and Information Technology announced the GB38031-2025 battery safety standards in March. These regulations, set to take effect on July 1, 2026, introduce several key safety improvements:
Safety testing after repeated fast-charging cycles
Enhanced thermal runaway protection
Introduction of bottom impact testing
Geely’s Aegis Gold Brick Battery has already been certified as meeting all of these updated requirements, making it one of the first in the industry to achieve full compliance.
Inside the Aegis Battery System
The battery system features a compact, thick design with low internal resistance and reduced heat generation. It utilizes premium materials, including a dual-coated wet-process separator with an aluminum oxide heat-resistant layer, aimed at preventing cell rupture and thermal runaway in extreme conditions.
Geely has incorporated several advanced safety features:
IP68 and IPX9K protection ratings
CTB (Cell-to-Body) integration
A 2.6mm-thick “sandwich” bottom plate with grid-structured, energy-absorbing cross-sections
Liquid-electric separation and heat dissipation mechanisms
Altogether, these technologies work to isolate heat, prevent short-circuits, and maintain battery stability under physical stress.
Exceeding Compliance
While the national standard requires 24 safety tests, Geely’s battery undergoes 36, with 23 surpassing regulatory benchmarks. The company has already included the new “bottom impact” test in its internal protocols and plans to make its battery safety patents available to the wider industry.
The Galaxy E5 has also excelled in other independent safety evaluations. Tests conducted by the China Automotive Technology and Research Center (CATARC) confirmed its resistance to high temperatures and other critical stressors. The vehicle has earned NESTA six-dimensional electrical safety certification, along with five-star safety ratings from both Euro NCAP and ANCAP.
With nearly one million units sold across the Galaxy lineup and zero reported spontaneous combustion incidents, Geely is positioning its safety technology as a core competitive edge. Later this year, the company plans to open its Global Comprehensive Safety Test Center—billed as the world’s largest dedicated battery safety lab—to the broader automotive industry.
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