10kw PTC High Voltage Coolant Heater For EV

If you're looking for the 10kw ptc high voltage coolant heater for ev, welcome to wholesale the product from our factory. As one of the leading manufacturers and suppliers in China, we will offer you the best service and fast delivery. Now, check the quotation with our seller.

 

 

The 10kW PTC High Voltage Coolant Heater for EV is a compact heating unit engineered to warm coolant in electric vehicle thermal management systems-supporting fast, precise temperature control across battery, cabin, and other coolant-based heating loops.

 

 

 

 

Item	SR03-17
Power	10 KW (350VDC, 10L/min, 0℃)
High voltage	200~500VDC
Low voltage	9-16VDC
Communication method	CAN
IP grade	IP 6K9K & IP67
Coolant	50 ( water) +50 (ethylene glycol)
Heating method	PTC positive temperature coefficient thermistor

 

 

 

 

Power curve

 This chart shows the heater's actual power output across varying operating conditions, verifying that the unit reaches its rated 10kW±10% output under real-world flow and temperature variation - not just under lab-ideal test conditions.

 

Flow resistance curve

This chart shows the pressure drop the heater introduces into the coolant loop as flow rate increases.

 

 

1. Full DV Testing Program, Not Just a Rated Spec Sheet

At NF, we validate every heater through an extensive Design Validation program spanning environmental, thermal, mechanical, and electrical safety testing - from salt spray and vibration to reverse power connection and open/short-circuit testing. Rated numbers on a spec sheet only tell you what the unit should do; our testing confirms how it actually holds up under the stress conditions real EV operation creates.

 

2. Precision Power Control, Not Fixed-Output Heating

Rather than running at a single fixed heat level, our heater responds to a PWM duty-cycle signal (0–100%) over CAN bus - allowing the connected system to dial in exactly the heat output needed at any moment, improving both energy efficiency and thermal response time compared to fixed-output heaters.

 

3. Automatic, Self-Recovering Protection

Every protection function we've built in - from voltage and overcurrent protection to IGBT and thermal protection - is paired with both a trigger threshold and an automatic recovery point. The system resumes normal operation on its own once conditions return to a safe range, without requiring a manual reset for routine fluctuations.

 

4. Automotive-Grade Environmental Durability

We rate our heaters IP6K9K & IP67 and validate them across a -40°C to 125°C use and storage range, so they perform in the same demanding conditions the rest of the vehicle's electrical system must withstand - not a general-purpose heating component adapted for automotive use.

 

5. Lightweight, Space-Conscious Design

At NF, we've engineered this unit to weigh just ≤3.1kg, with a customizable mounting bracket option, so it integrates into tight EV thermal system layouts without adding meaningful weight to the vehicle.

 

6. CE Certified for International Market Compliance

Our heaters are CE certified, meeting recognized European conformity requirements - giving international buyers a verifiable compliance signal beyond our own claims.

 

 

This 10kW PTC coolant heater is designed for use in EV coolant-based thermal management systems, providing fast, precise heating wherever a vehicle's platform requires it - supporting stable performance and comfort across a range of driving conditions, including cold-climate operation.

 

 

Q1. What is the rated power output of this heater?
The unit delivers 10kW ±10% of heating power, rated at 650VDC with 20L/min coolant flow and 20°C inlet temperature.

 

Q2. What voltage range does the heater operate on?
The high-voltage side operates from 350–900VDC, and the low-voltage side operates from 8–32VDC.

 

Q3. How is the heater controlled?
The heater is controlled via CAN bus communication (500kbps), receiving a PWM duty-cycle signal (0–100%) to precisely regulate power output based on system demand.

 

Q4. What operating temperature range does the heater support?
The unit operates reliably from -40°C to 125°C for both use and storage conditions, with a coolant temperature range of -40°C to 90°C.

 

Q5. What coolant is the heater compatible with?
The heater is designed for a standard 50% water / 50% ethylene glycol coolant mixture.

 

Q6. What protection level does the heater have against dust and water?
The unit is rated IP6K9K & IP67, suitable for demanding automotive environments.

 

Q7. What built-in protection features does the heater include?
The heater includes multiple layers of automatic protection - voltage, overcurrent, IGBT short/open-circuit, thermal, water inlet temperature, and CAN communication fault protection - each with automatic recovery once conditions return to a safe range.

 

Q8. Is the heater certified for international markets?
Yes, the heater is CE certified, meeting recognized European conformity requirements.

 

Q9. Has the product undergone reliability testing?
Yes. Every unit is validated through a comprehensive Design Validation (DV) testing program covering environmental, thermal, mechanical, and electrical safety testing - including vibration, salt spray, drop testing, and high-voltage withstand testing, among others.

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