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A Simple Idea With Big Potential
What if electric vehicles borrowed a proven technology from heated windshields? For decades, embedded wire elements in glass have been used to quickly defrost and de-ice windshields—cheaply, reliably, and efficiently.
Now imagine using a similar approach to warm EV battery packs. It’s targeted, fast, and could improve battery performance, especially in colder climates.
Heat Where It Matters
Instead of relying solely on liquid-based thermal systems, resistive heating elements could be wrapped around battery cells. This would allow EVs to:
- Pre-warm battery packs for faster charging
- Maintain optimal temperatures in freezing conditions
- Avoid energy losses by heating the cells directly
- Simplify thermal systems by reducing the need for pumps and coolant loops
This tech already performs well in harsh environments—handling ice, vibration, and temperature swings daily.
Why It’s Not Yet Common
While the idea is clever, most modern EVs rely on heat pumps. These systems move heat from one place to another, using far less energy than generating heat directly. In fact, they can deliver up to five times more heat per unit of energy consumed.
More importantly, EV batteries need both heating and cooling. A liquid system manages both, distributing thermal energy evenly and efficiently. For now, liquid cooling systems remain essential, especially during high-speed charging or hot weather driving.
That said, some manufacturers are exploring resistive heating for specific battery types. For example, lithium iron phosphate (LFP) batteries, which are gaining popularity in cost-effective EVs, may benefit from this simpler heating method.
A Familiar Solution, Rethought
This concept shows how established technologies can spark innovative thinking in new areas. As EVs evolve, combining smart design with proven ideas could unlock the next wave of performance and efficiency.
What Comes Next?
The idea of using localized resistive heating isn’t off the table—it’s already appearing in experimental systems and budget EV platforms. As battery chemistries diversify and cost pressures grow, automakers may revisit simpler heating strategies to suit specific use cases.
Innovation doesn’t always mean reinventing the wheel. Sometimes, it means rediscovering it.
