PTC Heater HVCH 25KW30KW35KW 600V800V1100V 12KG Bus Truck Construction Machinery BTMS RBS Battery Heating Cabin Heating EVLINK

Are You Facing These Thermal Management Challenges?

Vibration Testing

EVLINK has successfully completed comprehensive water circulation  and power-on performance testing for its Q Series PTC Coolant Heaters at the laboratory facilities of Shanghai University of Engineering Science (SUES). 

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

In recent years, with increasingly stringent environmental policies and the continuous development of new energy technologies, battery-swapping heavy trucks have gradually gained a foothold in the heavy truck market due to their unique advantages. Compared to traditional diesel heavy trucks, battery-swapping heavy trucks not only have significant environmental benefits but also offer cost savings in long-term operations for enterprises.

The advantages of battery-swapping heavy trucks are mainly reflected in two aspects. Firstly, from an environmental perspective, battery-swapping heavy trucks can significantly reduce exhaust emissions, contributing positively to air quality improvement. This is especially important today, given the frequent occurrences of heavy pollution weather. Secondly, from an economic perspective, although the initial purchase cost of battery-swapping heavy trucks is higher, their operating costs are lower. Over the long term, the total cost is significantly lower than that of diesel heavy trucks.

EVLINK's PTC heaters play a critical role in battery-swapping heavy trucks. These heaters can provide 15-30kW of heating power in 15kW refrigeration units, enabling battery-swapping heavy trucks to quickly increase the battery temperature even in extremely cold environments.

 
High Voltage and High Power Design

Maximum Power and Voltage

• Maximum Power: 28kW, sufficient to meet the heating needs of most cold areas.
• Maximum Rated Voltage: DC 1050V, a future trend.

Market Recognition

Customers and Collaborations

• EVLINK products are chosen by newly developed heater models in the electric heavy truck field.
• HVCH-Q heaters were installed in journalist vehicles during the Beijing Winter Olympics.
• Installed the world's first modified super-large electric heavy truck.

Innovations

PTC Modular Design

• Unique modular insulated ceramic heater design addresses the demand for higher power, which competitors' PTC heaters cannot meet.
• Custom heating cores ensure good voltage resistance and low-temperature start-up performance.

Matrix Arrangement Structure

• Unique heating element arrangement improves heat dissipation efficiency.
• High-quality alumina ceramic substrates are used as insulation materials, solving the problems of traditional polyimide films being prone to scratches and reduced insulation performance at high temperatures.

Copper Busbar Connection

• Copper busbar connection modules simplify the internal structure of the heater, addressing the issues of short circuits or leakage in traditional wiring.

Safety Precautions

Surge Current Management

• Using PTC chips with good low-temperature start-up performance to smooth the current curve and reduce surge current.
• Staggered start-up reduces overall current.

Transient Overvoltage Protection

• High-voltage power supply filter capacitors and overvoltage protection devices.
• Selecting 1600V IGBTs to increase breakdown voltage.

High-Temperature Risk Control

• Combining mechanical temperature control switches with glass-sealed NTC thermistors to ensure safety under high temperatures.

Waterproof Structure

• Silicone parts combined with stainless steel plates ensure waterproof performance at inlet and outlet pipes.
• Optimized mounting feet design enhances resistance to bumps and impacts.

Control Logic

Soft Start

• Grouped start-up, each group controlled by independent IGBTs, with special step-by-step start-up logic to achieve smooth start-up.

PID Regulation

• Collaborating with customers to debug PID regulation, optimizing energy-saving strategies based on temperature.

No-Load Switching

• Combining contactors with IGBTs to ensure minimal impact on contactors during switching, preventing adhesion.

Conclusion

EVLINK's automotive water heaters offer efficient and reliable heating solutions through innovative PTC modular design, robust safety precautions, and precise control logic. These innovations not only enhance product performance but also further solidify EVLINK's leading position in the automotive thermal management field.