SMRTR Science & EngineeringAug 27, 2026Reddit

Thermal runaway solved? Non-flammable sodium battery passes extreme safety testing

SMRTR summary

Hyundai Motor Group partnered with US startup UNIGRID to test a non-flammable sodium-based battery that passed extreme safety testing with zero fires. The sodium chromium oxide cells lasted up to 30,000 cycles, roughly 25 years, and performed reliably from -20°C to 60°C, making them ideal for powering Hyundai's global factories safely.

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