Exciting Developments and Endless Opportunities at CIES2025!
The 15th China International Energy Storage Conference (CIES2025), hosted by the China Chemical and Physical Power Industry Association and supported by over 800 organizations, grandly opened on March 23, 2025, at the Hangzhou International Expo Center. The accompanying exhibition commenced on March 24.
This year’s conference received support from more than 500 industry, academic, and research institutions along with upstream and downstream enterprises, gathering over 1,000 companies and more than 60,000 guests from around the world.
The participating companies include manufacturers, suppliers, distributors, and service providers of energy storage products and solutions, as well as comprehensive energy service companies, grid and power supply companies, power generation groups, installers, and system integrators. In addition, there are planning and design units for energy storage stations, EPC contractors, local energy storage industrial parks, and related entities from wind, solar, and thermal energy sectors. The event also includes energy storage system buyers, investment firms, operational parties, academic and research institutions, securities analysts, and authoritative media.
Over four days, stakeholders from the energy storage industry gathered in beautiful Hangzhou to co-create a new energy storage ecosystem, establishing a high-quality platform for transactions, communication, learning, and sharing.
The CIES exhibition is recognized as one of the most professional events in the domestic energy storage sector and has been an industry leader for 15 consecutive years. It has witnessed the remarkable growth of China’s energy storage industry and aligns with the main and sub-forums of the China International Energy Storage Conference, forming an innovative matrix that covers the entire energy storage industry chain of production, academia, research, and application. Participants explore new technologies and scenarios that lead the future of energy storage, sharing insights and opportunities for industry development, making it a significant barometer for global energy storage technology innovation and international cooperation.
The exhibition focuses on the latest cutting-edge technologies, products, trends, developments, and innovations in business models. Over the past 15 years, it has provided opportunities for communication and collaboration among key players in the energy storage sector, from manufacturers and suppliers to integrators, installers, service providers, project developers, planning and design units, owners, and startups.
This year’s exhibition covers an area of 50,000 square meters, featuring major industry players and elites gathered in four themed pavilions, sponsored by Tongfei Co., Wanjin Energy Storage, XJ Electric, and Youdan Technology. The focus is on global leading technologies and practices in the energy storage field, actively building communication channels between government and enterprises while exploring new pathways for high-quality development in the energy storage industry. The event promotes the deep integration of specialized, sophisticated, and innovative technologies, capital, and services.
Moreover, the exhibition continues to assist exhibitors in expanding brand influence and visibility, actively exploring domestic and international market channels, enhancing the competitiveness and market share of independently controllable products, and accelerating the growth of Chinese energy storage brand enterprises, contributing “energy storage wisdom” and “energy storage solutions” to building a green, efficient, flexible, intelligent, and sustainable modern energy system.
At this year’s exhibition, over 300 leading domestic energy storage brands showcased cutting-edge technologies and innovative applications. These brands represent top-ranking energy storage system integrators, supporting device suppliers, project developers/EPC contractors, testing and certification agencies, and financial service providers from various fields within China’s new energy storage industry, as well as business institutions, overseas enterprises, international business associations, international buyers, and regional representatives from over 20 countries.
On the opening day, the venue buzzed with excitement and business prospects, registering over 60,000 attendees.
The exhibited products and solutions include:
- Integrated Systems: Large-scale energy storage systems, commercial and industrial energy storage systems, and residential energy storage systems.
- System Components: Battery cells and packs, PCS, BMS, EMS, temperature control, and fire protection.
- Energy Storage Batteries: Lithium-ion batteries, flow batteries, lead-acid batteries, lead-carbon batteries, sodium-sulfur batteries, aqueous sodium-ion batteries, new batteries, nickel-hydrogen batteries, hydrogen storage and fuel cells, and supercapacitors.
- System Equipment: Energy storage connectors/wiring harnesses, circuit breakers, fuses, transformers, cables, energy storage containers/cabinets, distribution equipment, control systems, power modules, pumps, fans, and liquid cooling pipelines.
- Physical Energy Storage: Flywheel storage, compressed air storage, gravitational storage, and superconducting storage.
- Thermal Energy Storage: Molten salt storage and thermal (cold) storage.
- Testing and Certification: Energy storage EPC projects, vehicle-to-grid interaction, and virtual power plants.
Additionally, some exhibitors showcased customized production line solutions for energy storage batteries, electric vehicle charging and swapping equipment, energy-saving and integrated energy services, battery recycling and cascading utilization, smart energy Internet, and grid-connected products for renewable energy generation.
Participating companies in the system integration field include Nandu Power, Pylon Technologies, Zhiguang Energy Storage, Singularity Energy, Wolong Energy Storage, CRRC Ningbo, Wanjin Energy Storage, China Electric Power Storage, Dongfang Xuneng, China Mobile Energy, and Beiren Green Energy. In the energy storage battery sector, companies include EVE Energy, BYD, Weilan New Energy, Shengyang Power, and Jianheng Aoneng. In the field of flow battery storage, exhibitors include Dalian Rongke, Weijing Storage, Huaneng Ronghua, Beijing Green Vanadium, Shanxi Guorun, and Xinxing Cast Pipe. Participants in the flywheel storage sector include Shenyang Weikong and Beijing Honghui; in molten salt storage, companies include Green Storage Technology and Xizi Clean Energy. Additionally, in the supercapacitor sector, Jinzhai Times and in compressed air storage, Shan Gu Group are present.
Exhibitors in the PCS/BMS/EMS sectors include Youdan Technology, XJ Electric, XieNeng Technology, Gaote Electronics, Huashu Technology, New Ai Electric, Yuntian Energy, Zhonghua Lantian, and many others.
It’s worth noting that with the rapid increase in the number of new energy vehicles and the continuous improvement of the electricity market, vehicle-to-grid interaction will witness unprecedented development opportunities as an essential component of future smart grids and clean energy systems. More than a dozen car manufacturers, including GAC Toyota, NIO, Faraday Future, Zhongsheng Mercedes-Benz, Zeekr, Volvo, Li Auto, BYD, Leap Motor, Huawei Aito, Tesla, Chery, and Wuling Hongguang participated in this exhibition to explore new ideas, business opportunities, and prospects for vehicle-to-grid interaction.
The development of new products reflects the current state of market competition and the direction of new technologies in the industry. In 2024, with the rapid development of the energy storage industry, the iteration speed of products and technologies across the energy storage supply chain is significantly accelerating. Keeping track of new technology and product developments is crucial, and the release of new energy storage products has always been a highlight of the energy storage conference. CIES2025 will continue to make new product launches a key segment of the conference, setting up three special sessions for new product releases, providing a superb platform for showcasing cutting-edge technologies and products, with over 30 new products making their global debut.
For instance, Zhiguang Energy Storage, an advocate and leader in cascade-type high-voltage large-capacity energy storage technology, showcased its large-capacity cascade high-voltage energy storage technology solution with a single unit capacity ranging from 50MW to 100MW. This technology features grid formation and black start capabilities, with a rapid frequency response that is compatible with virtual synchronous machines and provides both active and reactive support. In grid-connected scenarios, the 100MW-level grid-forming energy storage system can offer virtual inertia, enhance short-circuit capacity, increase system strength, and achieve rapid system responses.
In microgrid scenarios, it can realize black start capability, serving as a backup power supply and uninterruptible power supply (UPS). The 100MW-level 35kV energy storage system demonstrates strong voltage adaptability and fault tolerance in complex application scenarios, promoting deeper application and development of energy storage systems within new power systems.
Shanghai Xixing Technology, a leader in PCS technology, globally launched its 125kW grid-forming commercial and industrial energy storage PCS, enabling seamless switching between grid-connected and off-grid modes. Its unique switching solution reduces overall machine costs by 6%, with a silicon carbide (SiC) maximum efficiency of ≥98.8%.
Pylon Technologies is actively expanding into the large storage market and has entered the long-duration energy storage sector. At this exhibition, it launched a 6.9MWh battery container product characterized by low cost, high energy density, long cycle life, high reliability, and enhanced safety features. Compared to the 5MWh container, this product offers a 15% reduction in comprehensive costs, a 35% increase in space utilization, and a lithium replenishment system achieving over 12,000 long cycles, along with a simpler structure that enhances overall reliability by over 33%. It features a 2-hour fire-resistant system with built-in fire protection, further improving safety.
Another product released by Pylon Technologies, the virtual impedance modulator, intelligently adjusts the output impedance of each battery cluster based on state of charge (SOC) information provided by the battery management system (BMS), achieving precise control over the charging and discharging current of the battery clusters. This innovation enables zero circulating current between battery clusters and actively balances SOC among them, enhancing project internal rate of return (IRR) by over 2.5%, increasing lifecycle depth of discharge (DOD) by more than 8%, while keeping cost increases below 0.5 cents/Wh and operational losses under 0.5%. The current distribution is controllable, supporting a maximum of 48 clusters in parallel, ensuring seamless operation for 4 to 8 hours while elevating battery discharge voltage to 1280V and enabling the PV storage system to use an 800V transformer, thereby reducing equipment investment, footprint, and charging energy consumption.
Additionally, Juneng Technology launched the new thermal management liquid cooling unit, Juneng GSCOOL; Wanjin Energy Storage shared their second-generation Wan Jin Star energy storage product; Jianjie IoT unveiled EMS500; Huashu Technology presented the global debut of their HV3S commercial storage system; Yongtai Shuneng introduced the 125kW/261kWh commercial energy storage system; and Huazhi Energy launched the 2025 Zhihui Energy Storage Treasure commercial energy storage new product.
