#China #Suzhou #Electric Bus #Liquid-Cooling #XD THERMAL

XD THERMAL's Innovative Cooling System for Electric Buses

In a significant step for sustainable public transportation, XD THERMAL has unveiled an integrated liquid-cooling architecture specifically designed for European electric bus platforms. This innovative cooling system, capable of managing heat from both sides of the battery modules, offers enhanced efficiency and durability, making electric buses more reliable on the road.

Development Breakthrough

The development of this advanced cooling architecture has been a striking achievement for XD THERMAL. In just six weeks, the first prototype was completed, showcasing the company's ability to innovate rapidly. The design not only met the rigorous demands of modern electric vehicles but also achieved production readiness within two months. This accelerated timeline highlights XD THERMAL's commitment to delivering state-of-the-art solutions to the electric transportation sector.

Technical Specifications

The heart of this cooling architecture is a dual-sided approach that integrates thoroughly into the 35.3-kWh battery system of the bus. By employing liquid-cooled enclosures paired with stamped top plates, XD THERMAL can effectively manage heat, prolonging the life of lithium batteries.

One of the standout features of this design is its capacity to reduce cooling-related components by approximately 25%. This not only minimizes material usage but also simplifies various assembly steps, translating to a more efficient manufacturing process. The multi-interface configuration enhances the distribution of heat, crucial for maintaining optimal battery performance.

As Xu, the Technical Director at XD THERMAL, succinctly pointed out, “When cooling is integrated into the enclosure, the dynamics of design change significantly.” The primary task shifts from merely optimizing cooling plates to ensuring the entire structure can deliver consistent thermal performance while remaining economically viable for mass production.

Engineering Challenges

While the development progress was rapid, it was not without its challenges. A major hurdle faced by the engineering team was validating the system-level sealing of the cooling architecture. With numerous interfaces and joints, assessing sealing integrity collectively was imperative for preventing leaks. The team employed precision fixtures and conducted rigorous staged air-leak and helium-leak testing to ensure comprehensive sealing before the product's release.

Additionally, creating a production process that could accommodate the multifunctional coating system proved complex. Different battery module surfaces necessitated various insulating and thermal-barrier materials, highlighting the need for tailored production processes for effective coating application. This required innovative hanging and masking techniques to maintain boundaries and ensure consistent application across complex geometries.

Moving Forward

XD THERMAL's forward-thinking approach did not stop at merely designing the cooling architecture. The company expanded its thermal-management operations in early 2025, adding production resources aimed at larger-format battery components. By the end of the year, it achieved readiness for volume production, establishing a comprehensive workflow that supports projects with varying battery pack sizes and structural demands.

The architecture's scalable nature allows it to adapt to different vehicle platforms, battery dimensions, and capacity needs, all without requiring fundamental redesigns. This flexibility is vital in a rapidly evolving market that increasingly favors electric options for public transport.

XD THERMAL will showcase this groundbreaking technology at the IAA TRANSPORTATION 2026 event in Hannover this September, where it plans to engage industry partners about battery integration, manufacturability, and transitioning from prototypes to series production.

In summary, XD THERMAL's integrated cooling architecture represents a pivotal evolution in the realm of electric buses, positioning the company as a leader in sustainable transportation technology in Europe. With promising advancements in thermal management, the electric bus industry can look forward to enhanced performance, increased reliability, and a solid step towards a greener future.