Refrigerant-side Integrated Thermal Management Module (Nonavalve)

Key Features and Advantages of the Nonavalve

Application in Electric Vehicles

Nonavalve Application and Manufacturing

01

Application Case: BYD e3.0 Platform and the Nonavalve Integration

The BYD e3.0 platform introduced a new generation of heat pump air-conditioning systems based on direct refrigerant-cooled thermal management, which includes multiple functional modes such as:

• Heat pump heating
• A/C cooling
• Battery cooling
• Battery heating
• Combined cooling and battery cooling
• Combined heating and battery heating
• Dehumidification

At the heart of this system lies the Nonavalve—a refrigerant-side integrated thermal management module with nine ports that coordinates flow paths between the cabin, battery, and powertrain cooling circuits. This compact and multi-functional valve system replaces numerous discrete components, reducing complexity, minimizing pressure drops, and enhancing thermal control response.
 

By implementing the Nonavalve in its thermal loop, BYD achieves:

• Direct heating and cooling of the battery using refrigerant for higher efficiency
• Simplified refrigerant piping, improving layout and reducing leakage risk
• Streamlined vehicle assembly, as the integrated design shortens installation time on production lines
• Improved system reliability and modular scalability

This practical application of the Refrigerant-side Integrated Thermal Management Module, also known as the Nonavalve, exemplifies how modern EV platforms can benefit from high-integration, compact thermal systems to meet increasingly demanding energy efficiency and performance requirements.

02

Guchen’s Development and Validation Capabilities

As a professional thermal system solution provider, Guchen Industry possesses full capabilities in the design, development, and validation of integrated thermal management modules like the Nonavalve. Guchen’s engineering team supports customers from system concept to final validation, covering:

• System Principle Analysis and Layout Optimization– Conducting full refrigerant-side system architecture design and evaluating interaction between circuits (cabin, battery, e-drive).
• Low-Resistance Flow Channel Design– Developing flow paths that minimize pressure loss while maintaining heat exchange efficiency.
• 
• Low Pressure Drop Technology
• Thermal Insulation and Cross-Heat Exchange Control– Designing flow channel separation to prevent thermal interference while enabling targeted heat transfer.
• NVH Evaluation– Performing modal analysis, noise modeling, and vibration isolation assessment to ensure quiet and reliable operation in vehicle environments.
• Module Performance Testing– Conducting bench validation for heat transfer capacity, leakage performance, durability, and environmental simulation under working conditions.
• 
• Air Purge and Refill Technology

Through this comprehensive R&D process, Guchen Industry delivers highly customized and reliable integrated thermal modules tailored to the technical and production needs of OEMs and Tier 1s in the electric vehicle industry.

03

Manufacturing and Quality Assurance

◆ Valve Plate Production: Employs forging followed by precision machining to ensure structural integrity and performance.
◆ Error Prevention in Assembly:
Electrical components are verified through barcode scanning and visual inspection systems.
Wiring harnesses are designed with specific lengths and undergo End-of-Line (EOL) testing to prevent misassembly.