EV Battery Preheating
Lithium-ion battery packs lose range, charging speed, and in extreme cases safety margin when they’re cold — preheating is often the difference between a normal charge and a severely limited one.
Cold batteries don’t just charge slower — many EV battery management systems actively limit charge rate and power output below a certain pack temperature, specifically to protect the cells. Preheating removes that limitation.
How PTC battery preheating works
A bottom-mounted PTC element sits against the battery pack housing, heating through the enclosure wall without placing electrical components directly in contact with the battery cells or coolant. As the pack warms, the element self-limits, avoiding the risk of localized overheating near temperature-sensitive cells.
Bottom-mounted type
Heats through the battery enclosure wall without direct contact with cells or coolant, for a clean electrical isolation boundary.
View Liquid Heater products →Why this matters for EV performance
- Faster charge rates once the pack reaches an acceptable temperature window.
- Better cold-weather range by avoiding the efficiency losses of a cold pack.
- Cell safety margin preserved by avoiding both under- and over-temperature extremes.
See what a PTC heater is in automotive applications for the broader picture across vehicle subsystems. PTCWORKS manufactures automotive-grade liquid heater elements for battery thermal management — contact our team with your pack specifications.
Engineering a battery thermal management system?
Send your pack dimensions, target temperature and voltage — we’ll recommend a starting element.