What Is a PTC Coolant Heater and Why Is It Essential for Electric Commercial Vehicles?

Introduction

Unlike conventional diesel vehicles, electric commercial vehicles require dedicated thermal management systems to ensure battery performance, cabin comfort, and operational reliability.

One of the most critical components is the PTC Coolant Heater.

                        What Is a PTC Coolant Heater?

A PTC (Positive Temperature Coefficient) coolant heater converts electrical energy into heat and transfers it to the coolant circuit.

Applications:

· Battery Heating

· Cabin Heating

· Defrosting

· Regenerative Energy Management

Why Do Electric Commercial Vehicles Need PTC Heaters?

Problems caused by low temperatures:

· Reduced battery capacity

· Reduced charging efficiency

· Limited regenerative braking

· Cabin comfort issues

Benefits of High-Voltage PTC Heaters
· Fast heating 
· High efficiency 
· Intelligent CAN control 
· Maintenance-free operation 
· High-voltage compatibility 

EVLINK Solution

EVLINK high-voltage PTC coolant heaters support:

· 400V–1100V

· 3kW–35kW

· CAN communication

· IP67 protection

EVLINK’s high-voltage, high-power coolant heaters have been in continuous mass production for five years and are widely applied in large electric commercial vehicles, electric vessels, and heavy-duty electric mining trucks.

Through close cooperation with leading OEMs both domestically and internationally, we contribute to the efficient development of the new energy commercial vehicle industry, with a mission centered on meeting customer needs.

The Q Series is our most powerful PTC liquid heater, with a maximum output of up to 35 kW.