XD THERMAL Unveils Innovative Dual-Sided Cooling Architecture for Electric Buses

Introduction

In a significant advancement for electric bus technology, XD THERMAL has successfully developed an integrated dual-sided liquid cooling architecture designed specifically for a European electric bus platform. This innovative system is set to revolutionize battery management and overall vehicle performance in the growing sector of electric public transportation.

Overview of the Integrated Cooling Architecture

XD THERMAL's new cooling architecture features a 35.3-kWh battery system that employs liquid-cooled housings combined with stamped cover plates. This design allows for enhanced heat dissipation from both sides of the battery modules, an essential factor for maintaining optimal operating temperatures. The company managed to deliver the first prototype in just six weeks, and within two months, the design reached production readiness, showcasing a remarkable speed of innovation.

Streamlining Cooling Components

The integration of cooling functionalities directly into the battery housing led to a reduction in cooling-related components by approximately 25%. This simplified assembly process not only reduces manufacturing complexity but also enhances the thermal distribution throughout the battery system. Such advancements play a crucial role in prolonging the lifespan of lithium batteries, which is vital for the reliability of electric buses under various operational conditions.

Challenges in Development

A primary technical hurdle was ensuring system-level leak integrity, as the architecture consists of multiple interfaces, seams, and sealing paths that needed to be evaluated together rather than as separate components. The development team conducted precision testing using air and helium leak tests, which proved critical for identifying minor leaks before the system's final release.

Another significant challenge was creating a dependable production process for the multifunctional coating system. Various surfaces required specific insulating and thermal barrier materials, leading to the need for custom hanging and masking solutions. These solutions ensured consistent coating application across complex geometries, adapting to the varied requirements of the bus designs.

Design Integration and Teams Collaboration

"When cooling becomes part of the housing, the design boundaries shift," stated Xu, the Technical Director at XD THERMAL. This change directs focus not just on optimizing an individual cooling plate but on ensuring that the entire structure maintains stable thermal performance while being feasible for mass production. The development teams focused on thermal management, construction, processes, quality assurance, and manufacturing worked parallelly throughout the project. This collaborative approach allowed insights gained during prototype construction to directly inform design and process revisions, thus improving efficiency.

Scalability and Versatility

One of the most appealing aspects of this new cooling architecture is its scalability. It can easily adapt to various vehicle platforms and battery pack sizes without necessitating a complete redesign of the cooling concept. This flexibility positions XD THERMAL favorably in the competitive electric vehicle market, where varied configurations are frequently required to meet different operational demands.

Expansion of Vehicle Thermal Management

Since early 2025, XD THERMAL has expanded its commercial thermal management operations for commercial vehicles, adding dedicated production resources for large-scale battery cooling components. This facility is now capable of supporting electric bus and heavy-duty vehicle programs beyond the original platform. It consolidates engineering, validation, and production resources to streamline workflows for programs with diverse battery configurations and structural needs.

Upcoming Presentation at IAA TRANSPORTATION 2026

As part of its ongoing efforts to showcase its advancements and engage with industry partners, XD THERMAL will exhibit at the IAA TRANSPORTATION 2026 in Hanover. Visitors can find the company at Hall 22, Stand C23, where discussions will highlight topics like battery integration, manufacturability, and the transition from prototypes to mass production. This event provides an opportunity for XD THERMAL to further solidify its role as a leader in innovative thermal management solutions for electric vehicles.

Conclusion

The innovative cooling architecture developed by XD THERMAL signals a significant step forward in enhancing the performance and sustainability of electric buses. With its focus on integrating cooling functions into the battery design and simplifying production processes, XD THERMAL sets a benchmark within the industry. The dedication to research and development, combined with the scalable solutions offered, positions the company as a key player in shaping the future of electric public transportation.