China's Laminated Busbar Industry Defies Trends And Achieves Growth in 2025

Driven by both the dual-carbon strategy and the explosive growth of the new energy industry, China's laminated busbar industry is entering a period of high-quality development. In 2024, the domestic market size reached 5.83 billion yuan, a year-on-year increase of 6.7%, and is expected to further climb to 6.22 billion yuan in 2025. The energy storage sector, with a compound annual growth rate exceeding 25%, has become the core growth driver. As a core transmission component of high-end electrical equipment, Laminated Inverter Busbars, with their low inductance, high current carrying capacity, and excellent heat dissipation performance, are seeing continuous increases in penetration rates in new energy vehicles, rail transit, and photovoltaic energy storage.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In terms of technological innovation, the industry is making breakthroughs towards high power density, lightweight design, and integration. Leading companies are focusing on optimizing laminated bus bar designs. CRRC Times Electric's sandwich structure product reduces system inductance to below 15nH, successfully adapting to 800V high-voltage platform traction inverters. KSTAR's 1500V-class multilayer busbar has been mass-produced and applied in large-scale photovoltaic power plants, improving system efficiency by 3.2%. Among new products, Laminated bus bar with flexible terminals with integrated capacitors reduce equipment size through functional integration, while the integrated laminated busbar cell contact system improves the stability of the battery management system. Laminated flexible busbars, with their dynamic installation advantages, are highly favored in vibration environment applications. Furthermore, customized products such as laminated 90° angle bus bars and laminated bus bars with flexible terminals meet the needs of installation in confined spaces and complex wiring.

 

The continuous expansion of application scenarios has become a key engine for market growth. In the new energy vehicle sector, BYD's eighth-generation e-platform fully adopts an integrated solution, with each electric vehicle equipped with a laminated copper busbar worth an average of 280 yuan, driving a market demand of 2.66 billion yuan in this sector. In the rail transit sector, Laminated Busbar for Rail Traffic, with their high reliability, have achieved mass application in domestic high-speed rail and Southeast Asian infrastructure projects, while Ningbo Zhongtian Technology's related products have improved system efficiency by 31%. In the photovoltaic energy storage and industrial sectors, inverter busbars and laminated inverter busbars have become core components of inverters. Mersen's IGBT busbar protects power devices through a low-inductance design, while DC power busbars demonstrate excellent adaptability in 1500V DC systems.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In terms of the industry chain structure, Integrated Laminated Busbar Cell Contact System manufacturers are accelerating the process of domestic substitution, with industrial clusters forming in the Yangtze River Delta and Pearl River Delta regions. Jiangsu and Guangdong provinces account for more than 60% of the national output value. Companies like Shenzhen Greetech and Luokai have improved yield rates through automated production lines (covering over 75%), and their laminated copper bar products have obtained ISO 16946 certification, gaining widespread recognition in industrial automation and data center fields. Regarding raw materials, the localization rate of electrolytic copper foil and insulating film has steadily increased, effectively controlling production cost fluctuations for Laminated Busbars with Integrated Capacitors. Looking ahead, with the popularization of wide-bandgap semiconductors and the advancement of new power system construction, the application of Laminated 90° angle bus bar will extend to higher voltage and higher frequency scenarios. Industry experts point out that domestic companies are transforming from technology import to independent innovation, with export orders for European energy storage projects and Southeast Asian rail transit markets continuing to grow, further enhancing the position of domestically produced laminated busbars in the global supply chain.