The industry’s been chasing longer range and faster charging for years, but heat has always been the silent killer. Shell and FAW Trucks just proved that drowning a battery in insulating fluid isn’t sci‑fi—it’s real, and it works.
What happened
Shell partnered with China’s FAW Trucks to build a 600 kWh lithium‑ion pack that sits in a sealed tank of electrically insulating fluid. During a 1,200‑km test run on a Class 8 tractor‑trailer, the pack stayed 30 °F cooler than a conventional air‑cooled pack and delivered 12 % more range. The fluid, a non‑conductive dielectric oil, circulates passively, pulling heat straight from the cells without any pumps or fans. The trial, conducted in both hot summer conditions in Texas and cold winters in Ontario, showed no degradation after 2,000 charge cycles, suggesting durability gains too.
Why it matters for dispatchers/drivers
Heat‑related battery degradation has been a major headache for owners‑operators and fleet managers eyeing electric rigs. Cooler packs mean fewer forced stops for cooling, less wear on the battery management system, and tighter scheduling windows. For dispatchers, that translates to more reliable ETA predictions and less headache when a driver reports “battery overheating.” Drivers will also appreciate the quieter, pump‑free system—fewer moving parts mean fewer breakdowns on the road.
My take
This is a game‑changer. If immersion cooling can be mass‑produced at a price point comparable to current air‑cooled packs, the EV truck market will finally shed the “range‑anxiety” stigma that’s kept many fleets stuck on diesel. Shell’s involvement also means we’ll see a push for industry standards around fluid safety and disposal, which could speed up regulatory acceptance. The only risk is that the fluid adds weight and complexity, but the performance gains outweigh that.
What you should do
- **Talk to your OEM**: Ask if they’re planning immersion‑cooled models or retrofits for existing electric rigs.
- **Factor battery heat into routing**: When planning long hauls, consider ambient temps and the cooling method of the truck’s pack.
- **Stay educated**: Enroll in EK Dispatch Academy’s **EV Fundamentals** module (/curriculum) to learn how battery tech impacts load planning and compliance.
—EkJot Singh, Founder, EK Dispatch Academy