Desay Battery has taken part in the 2026 edition of the Smarter E Europe, showcasing its full portfolio of solutions spanning battery cells, systems, safety technologies and manufacturing services, launching its static immersion technology and proactive safety management system, while also unveiling a series of new cell and system products.
On display at the company’s booth was its full lineup of energy storage cells, including 100 Ah, 314 Ah and 587 Ah lithium-ion (LFP) batteries, as well as a 43 Ah sodium-ion cell. The 587 Ah high-capacity LFP cell is made for utility-scale storage plants, directly addressing the demand for lower costs and higher efficiency. Making its European debut, the 30 Ah-class solid-liquid state battery boasts an energy density exceeding 420 Wh/kg. First introduced in China in April this year, the cell has successfully passed rigorous nail penetration and 300 °C hot plate tests, positioning it as a next-generation technology solution.
The static immersion technology demonstrated at the show departs from conventional indirect liquid or air cooling. By physically isolating battery cells from the external environment, it fundamentally blocks thermal runaway propagation pathways. In the event of thermal runaway, the insulating liquid rapidly dissipates heat and cuts off oxygen contact, reducing accident risks to an absolute minimum. In addition, the multi-dimensional proactive safety management system integrates temperature-pressure sensors embedded inside the cells with millisecond-level multi-parameter monitoring, intelligent early warning and active suppression. The system can provide 30-day advance warning of thermal runaway risks, marking a decisive shift from passive protection to active defence.
At the exhibition, TÜV Rheinland recognized the company for its 5 MWh containerized energy storage system, encompassing a comprehensive evaluation across multiple dimensions, including product technical reliability, safety performance, production and delivery capability, financial health, market reputation and full-lifecycle operation and maintenance capability, providing complete compliance assurance for the company’s energy storage products to access global markets.
For the first time, the company also introduced its global OEM/ODM manufacturing service system to the European market. Under the “Service Platform Going Global” strategy, it exports not only products but also comprehensive delivery capabilities covering entire factory design, customized production line deployment, full-process system setup and localized mass production, effectively offering European customers a complete turnkey solution for energy storage manufacturing and operation, representing an upgrade from simple product trade to the systematic export of capabilities.
Since 2025, overseas project deployment has continued to accelerate. Cumulative installations of commercial and industrial energy storage projects in Bulgaria have exceeded 16 MWh and, in February this year, a new 2 MW/4.8 MWh project in Sliven was officially connected to the grid. In addition, a 200 MWh grid-scale frequency regulation project in partnership with Finland’s Lehto Group has entered the delivery phase.
