BYD’s battery subsidiary, FinDreams Battery, has signed a cooperation agreement with Changsha Fusheng Technology to develop Blade Battery systems for industrial and mining rail locomotives. According to a company announcement, the agreement was signed on September 7 at BYD’s Pingshan headquarters in Shenzhen.
The partnership is aimed at locomotives used in industrial facilities, mines, and railway yards, including shunting and on-site transportation. The agreement states that the new rail-vehicle Blade batteries must meet automotive-grade standards. Under the arrangement, FinDreams Battery will support battery research, development, and manufacturing, while Changsha Fusheng Technology will handle system integration and application development using its battery management systems and electronic control technology.
Changsha Fusheng Technology develops integrated energy systems for equipment operating within defined sites, and its role in the partnership will focus on integrating Blade batteries with the control systems needed for industrial rail operations. The announcement did not disclose the value of the deal, planned battery supply volumes, locomotive specifications, or a timeline for commercial deployment.
The agreement adds to FinDreams Battery’s recent activity in mining and industrial transport. On September 5, the company signed a similar agreement with Zero Carbon Engine Technology Group, with the two sides planning to explore projects in Mongolia, including electric mining trucks.
While rail locomotives are a new application for BYD, the company already has experience in heavy-duty electric vehicles. In June 2026, BYD delivered 100 T31 electric dump trucks, each equipped with a 424 kWh Blade Battery, to construction transport companies in Shenzhen. Its Q3 electric tractor truck also uses Blade Batteries and was shown with the T31 at an April event in Hunan, where BYD secured agreements for 150 new-energy heavy trucks. The Q3 electric tractor is slated to launch at IAA in Germany later this year.
BYD remains China’s second-largest battery supplier. From January to July 2026, it installed 72 GWh of EV batteries domestically for an 18% market share, down 13% from the same period last year. CATL installed 186 GWh in China during the same period for a 46% share, up 22% year over year. Some automakers are seeking to reduce dependence on CATL, including Li Auto, which is shifting toward batteries designed in-house and manufactured by Sunwoda.
Source: CarNewsChina
