At
a critical juncture as the new energy vehicle industry transitions to
the era of all-solid-state batteries, a core material technology
concerning battery safety and lifespan achieved a major breakthrough
today. The "Wide-Temperature-Range High-Thermal-Conductivity
Fluorosilicone-Phenyl Composite Putty," jointly developed by leading
domestic material enterprises and several top-tier automakers, has
officially passed rigorous automotive-grade extreme tests, marking a
systematic solution to the thermal management challenges of solid-state
batteries.
With
the launch of several mass-produced solid-state battery vehicle models
in 2026, the increase in battery pack energy density has brought
unprecedented heat dissipation challenges. Traditional silicone thermal
materials tend to harden and fail below -40°C and are prone to swelling
and degradation in the event of minor electrolyte leaks within the
battery. The newly released composite material innovatively incorporates
high-phenyl-content siloxane chains and specialized fluorosilicone oil
modification technologies. Test data shows that within an ultra-wide
temperature range of -60°C to 250°C, the material maintains a thermal
conductivity stable above 3.5 W/(m·K) and a volume resistivity as high
as 10^15 Ω·cm. Crucially, when facing potential leaks of
fluorine-containing electrolytes from solid-state batteries, the
material exhibits excellent chemical inertness, showing no performance
degradation after continuous immersion for 720 hours.
A
battery system chief engineer from a participating renowned automaker
stated, "This material not only solves the pain point of reduced range
for electric vehicles in extremely cold regions but also equips
high-activity battery systems like high-nickel and solid-state batteries
with 'fireproof and leak-proof' armor." It is reported that this
material has been ordered for use in three flagship electric models
launching in the second half of 2026. Industry analysis suggests that
this breakthrough will accelerate China's dominant position in the
global solid-state battery supply chain, with the relevant high-end
electronic adhesive market size expected to grow by over 30% within the
year.
Fluorosilicone rubber for transformers IOTA FHTV 3171 series
