Charged EVs | Advanced thick-film heaters on steel (HoS) for EV batteries: from cold starts to warm rides
Sponsored by Heraeus.
The electric vehicle market is emerging as a leading field for advanced heating technologies. In EVs, heating systems are essential not only for passenger comfort but also fundamental to thermal management, keeping battery cells within their optimal temperature range in cold climates. Proper thermal control enables faster and more efficient charging, longer driving range, and extended battery life. To achieve this, EV battery heaters must be compact, lightweight, reliable, energy-efficient, and durable under demanding conditions.
Thick-film heaters on steel (HoS) are advancing as a next-generation solution, gaining adoption in Asia due to their high-power density, design flexibility, and proven resilience in harsh environments. Unlike conventional systems such as heat pumps, cartridge heaters, or positive temperature coefficient (PTC) ceramic heaters, HoS technology offers superior efficiency, reduced size and weight, and faster thermal response.
This paper reviews traditional EV battery heating methods, outlines the performance advantages of HoS technology, and examines the market forces driving innovation in thermal management. A case study is also presented that demonstrates how HoS technology is enabling progress in electric mobility.
