Valeo High Voltage Ptc Heater 6kw 7kw 10kW For Heat Pump System DC 690V

Are You Facing These Thermal Management Challenges?

Applications

EVLINK Technology’s high-voltage PTC water heater is widely used in electric buses, electric heavy-duty trucks,  electric light trucks, mining trucks, and energy storage thermal management systems. 

About Us

Evlink was founded in 2020, specializing in the R&D and manufacturing of automotive-grade high-voltage,  high-power coolant heaters. Our core team brings over 10 years of experience in the electric vehicle components industry.

In 2025, the company achieved an annual revenue of nearly RMB 200 million, with a workforce of 400 employees,  including 80 R&D engineers.

Our core business focuses on electric heating solutions for thermal management systems in commercial vehicles.  We offer high-voltage coolant heaters with a voltage range of 600V–1100V and power output from 3kW to 35kW.  Our mass-produced models reach a maximum rated voltage of DC 870V and a maximum rated power of 35kW,  placing our technical performance at the forefront of the industry.

Our Team

The company operates a modern production base covering 18,000 square meters,  equipped with advanced manufacturing facilities and a  professional management team.

With 16 years of industry experience, we have established a senior R&D team of over 80 experts,  specializing in hardware, software, and system integration.

18000m²   |    80+          |    65+           |     30+

Factory Area                         R&D Engineers                   Export Countries                    Production Lines

Certifications & Patents

Our patented technologies reflect our continuous innovation in high-voltage PTC heating systems,  ensuring efficiency, safety, and long-term reliability.

Production Process

Backed by a professional R&D team and extensive project experience,  we provide customized development and system integration services for high-voltage liquid heaters based on  customers’ actual operating conditions, achieving optimized thermal management performance and better vehicle compatibility.

FAQ

Q: How to choose the right PTC water heater?
A: Please provide the following parameters to help with selection:

· Application scenario (bus / heavy-duty truck)

· Intended use (battery heating, cabin heating, regenerative braking energy recovery)

· Operating conditions

· Operating voltage range

· Rated voltage and power

· Battery type and capacity

· Target outlet water temperature

· Ambient operating temperature

· Coolant flow rate

· Installation space

Q: How does a PTC water heater work?
A: The PTC heater works by passing electric current through PTC ceramic material. The material’s resistance increases as temperature rises, automatically adjusting the heating power to maintain a constant temperature.

Q: Which vehicle types is it suitable for?
A: Suitable for most electric buses, electric trucks, and electric construction machinery (excavators, loaders, etc.).

Q: How does it perform in low-temperature environments?
A: PTC heaters remain stable in low-temperature conditions, making them ideal for electric vehicles in cold regions.

Q: What are the core advantages of EVLINK PTC water heaters?
A: High reliability, fast and uniform heating, patented thermal expansion control, moisture protection, and exceptional performance under extreme conditions.

Q: Is customized development supported?
A: Yes. Common customization options include:

· Power rating (3 kW – 35 kW)

· Voltage platform (400 V – 800 V)

· Communication protocol (CAN / EN enable)

· Mounting bracket design and dimensions

· High-voltage and low-voltage connectors

Q: Is OEM/ODM customization available?
A: Yes. Options include:

· Power and voltage customization

· Connector types

· Communication protocols (CAN, etc.)

· Appearance and mounting structure

Q: What is the lead time?
A: Minimum order quantity: 1 unit. Sample delivery within 7 days. Agile development ensures rapid response to changing requirements.

Q: Are certifications available?
A: The product meets automotive-grade standards and can provide certifications such as CE, ISO, and E-Mark.

Q: Are sample tests supported?
A: Yes. Samples can be provided for performance verification and vehicle integration testing.

Q: Does it support full vehicle system integration?
A: Yes. Integration with the vehicle control system is possible via CAN communication.

Introduction

Amid global warming and environmental pollution challenges, nations worldwide are committed to reducing carbon emissions and achieving carbon neutrality. Promoting and applying commercial electric vehicles (EVs) is a vital step towards this goal. Large lithium batteries, as the power source for commercial EVs, play a crucial role in the vehicle's performance, driving range, and lifespan. Due to their high energy/power density, long cycle life, and high stability, lithium batteries are the best choice for driving the development of electric vehicles.

However, lithium batteries are highly sensitive to temperature. At low temperatures (<15°C), the increased internal resistance and reduced reaction kinetics significantly lower the discharge capacity, shortening the driving range. More critically, subzero temperatures can trigger lithium dendrite growth during charging, causing internal short circuits. Uneven temperature distribution within the battery can also lead to inconsistent electrochemical processes, further reducing the battery pack's capacity and cycle life. Therefore, a battery thermal management system (BTMS) with liquid cooling and heating solutions is crucial for ensuring the safety and performance of lithium-ion batteries in electric vehicles.

EVLINK's PTC High-Voltage Liquid Heater

EVLINK has developed various PTC liquid heaters for commercial EVs, actively heating large lithium batteries through coolant. EVLINK's 20kW, 24kW, and 30kW PTC electric heaters are specifically designed for different types of commercial vehicle BTMS. BTMS integrators can transfer preheating strategy information to EVLINK's PTC high-voltage liquid heaters, such as requiring the heater to provide 24kW of heating power and adjust adaptively once a set temperature is reached. EVLINK's PTC high-voltage liquid heaters can adapt based on customer requirements, ensuring efficient and safe battery preheating.

Advantages of PTC Liquid Heaters

• High Power and Voltage: EVLINK heaters can operate at voltages up to 1100V, providing up to 35kW of heating power, making them suitable for large-scale commercial EVs.
• Efficient Preheating: Utilizing efficient PTC elements, EVLINK heaters can quickly heat the coolant to the desired temperature, rapidly raising battery temperature in low-temperature environments to ensure normal EV operation.
• Intelligent Adjustment: The heaters feature adaptive adjustment capabilities, adjusting heating power in real-time based on BTMS feedback, optimizing energy consumption, and improving overall system efficiency.
• Safety and Reliability: PTC materials have self-regulating properties; when the temperature reaches the set value, the resistance significantly increases, automatically limiting the current to ensure the safety of the heater and the battery.

Design Considerations for BTMS

BTMS design must consider various factors depending on the battery integration level. Specific designs should include battery preheating strategies, heat transfer paths and media selection, and battery pack geometry and layout. For external heating systems, optimizing heat transfer fluid and flow channel geometry is key to improving heating efficiency. Internal heating systems require efficient heat generation within the battery to achieve effective preheating.

Comparison of Different Heating Methods

• 
  
• Resistance Heating:
  • Energy Efficiency: There is some energy loss when converting electrical energy to heat.
  • Temperature Control: Additional control systems are needed for precise temperature control.
  • Thermal Inertia: Resistance heaters continue to release heat after being turned off, making it hard to quickly lower the temperature.
• 
  
• Induction Heating:
  • Equipment Cost: Induction heating equipment is generally expensive.
  • Electromagnetic Interference: High-frequency operation may cause electromagnetic interference affecting surrounding equipment.
  • Complexity: Requires precise control and design, making maintenance difficult.
• 
  
• Gas Heating:
  • Safety: There is a risk of gas leakage and explosions.
  • Emissions: The combustion process produces carbon dioxide and other pollutants.
  • Installation and Maintenance: Requires complex piping and ventilation systems, resulting in high maintenance costs.
• 
  
• Microwave Heating:
  • Penetration Depth: Microwave heating can only heat the surface, making it ineffective for deep heating.
  • Equipment Cost: Microwave heating equipment is expensive.
  • Safety: Preventing microwave leakage is necessary to ensure operational safety.
  • 
    
• 
  
• Infrared Heating:
  • Uniformity: Ineffective for heating non-uniform materials, potentially causing surface overheating.
  • Distance Limitation: Heating effectiveness significantly decreases with distance.
  • Equipment Cost: High-efficiency infrared heating equipment is costly.

Future Trends and Challenges

As EV adoption and technology advance, EVLINK remains committed to developing more efficient and reliable PTC liquid heaters, providing optimal battery thermal management solutions for commercial EVs. Future research will focus on further enhancing heating efficiency, optimizing BTMS design, and developing new materials and technologies to meet more stringent environmental conditions and power demands.

Conclusion

The promotion of EVs not only reduces pollution and emissions but also lessens dependence on oil. Lithium batteries' sensitivity to operating temperatures makes a thermal management system essential for ensuring high performance, long cycle life, and safe operation. EVLINK's PTC high-voltage liquid heaters, with their high power, high voltage, and intelligent adjustment features, are the ideal choice for commercial EV battery thermal management. In the future, EVLINK will continue to drive the development and application of EV technology.

EVLINK is dedicated to providing the highest quality PTC liquid heater solutions for commercial EVs, helping achieve green travel and sustainable development goals. If you have any questions or needs regarding our products, please feel free to contact us.