As the global automotive industry accelerates toward electrification, thermal management has emerged as a key determinant of vehicle performance, range, and passenger comfort. Hebei Nanfeng Automobile Equipment (Group) Co., Ltd., a leading Chinese supplier of new energy vehicle (NEV) components, has unveiled its latest-generation PTC water heater – an intelligent, safe, and highly efficient solution designed to meet the rigorous demands of modern electric and hybrid vehicles.
The PTC water heater acts essentially as a smart electric boiler. By heating the antifreeze coolant, it provides a stable and reliable thermal source for both cabin warming and power battery conditioning – two functions that are vital for cold‑weather driving and battery longevity. The device employs a positive temperature coefficient (PTC) ceramic thermistor as its core heating element. This material exhibits a distinctive resistance‑temperature behaviour: at low ambient temperatures, its resistance is low, allowing a large current to flow and deliver rapid heat for instant cold‑start performance. As the temperature rises, the resistance increases sharply, automatically reducing current and power. This self‑limiting property ensures the heater maintains a safe operating temperature without complex external controls, effectively eliminating any risk of overheating.
Safety is further enhanced by a water‑electricity separation architecture, where all live components are physically isolated from the coolant circuit. This design prevents electrical leakage and short circuits, complying with the most stringent high‑voltage safety standards for automotive applications. The PTC Coolant Heater also incorporates comprehensive protection features against over‑voltage, over‑current, over‑temperature, and dry‑run conditions.
In terms of performance, the EV Coolant Heater achieves thermal efficiency of up to 98%, delivers precise temperature control within ±2 °C, and offers a design life of 10 years thanks to the oxidation‑resistant PTC ceramics. It supports a wide voltage range of 350 V to 800 V, with power ratings from 1 kW to 30 kW, and operates reliably in extreme environments from −40 °C to +90 °C. With IP67 protection and CAN communication, it integrates seamlessly with vehicle control systems.
Typical applications include cabin heating, battery preheating to enhance charging efficiency and extend driving range, as well as auxiliary uses such as fuel‑cell prewarming and windscreen defrosting. Looking forward, the company is actively aligning its products with 800 V platforms, modular thermal management architectures, and intelligent features like OTA upgrades and UDS diagnostics, ensuring full lifecycle adaptability.
Hebei Nanfeng, established in 1993, operates six manufacturing bases and is a designated supplier for Chinese military vehicles. Its extensive product portfolio covers high‑voltage coolant heaters, electronic water pumps, BTMS, electric air compressors, EPS, EHPS, electric A/C compressors, three‑way valves, parking heaters, parking A/C units, plate heat exchangers, and more. The company welcomes inquiries from customers worldwide and is committed to providing tailored thermal solutions for the evolving mobility landscape.
For further information, please feel free to contact Nanfeng’s sales team directly.
Post time: Jul-16-2026
