On May 13th, the 18th China International Battery Fair (CIBF2026) officially opened, and Energy Trend went deep into the exhibition floor to explore the event.
Judging from the core products brought by the participating enterprises, the energy storage industry is accelerating its entry into a "high-capacity era." Ultra-high-capacity cells of 588Ah and above have become the absolute strategic focus for various companies, directly driving energy storage systems to leap towards the 6MWh to 8MWh range.
At the same time, technological routes are showing a significant trend toward diversification, and the industrialization pace of sodium-ion batteries has noticeably accelerated. Several enterprises, including Pylontech, Desay Battery, and China Sodium-ion Group, prominently featured their relevant sodium-ion products at this exhibition.
CORNEX NEW ENERGY
At this exhibition, in terms of energy storage products, CORNEX NEW ENERGY showcased its 588Ah large-capacity energy storage-dedicated battery and the M6 energy storage system based on the CTP3.0 platform.
Among these, the 588Ah cell achieves a gravimetric and volumetric energy density of 190Wh/kg and 419Wh/L, respectively, with an energy efficiency of 96.5% and a cycle life exceeding 12,000 cycles.
In terms of integration technology, its CTP3.0 module-less architecture integrates 104 cells into a single unified box. The volumetric density of a single pack reaches 280Wh/L with a rated energy of 195.68kWh, and the production processes have been reduced by 35%.
Built on the aforementioned technologies, the M6 energy storage system adopts a standard 20-foot prefabricated cabin. It boasts a rated energy of 6,250kWh and is equipped with top-discharge thermal management, an active balancing BMS (Battery Management System), and AI O&M (Operations and Maintenance) algorithms to achieve proactive safety warnings.
REPT BATTERO
At the exhibition, REPT BATTERO mainly displayed its self-developed "Wending" batteries within its energy storage business segment, including 588Ah, 392Ah, and 314Ah energy storage cells. Notably, the 588Ah cell is designed specifically for long-duration energy storage, featuring a single-cell capacity of 1.88kWh and an energy density of 420Wh/L. Its energy efficiency under 0.25P and 0.5P operating conditions reaches 96.6% and 95%, respectively.
The 392Ah cell is positioned for all-scenario applications, supporting multi-rate conditions from 0.25P to 1P, and can simultaneously meet the demands of both residential and grid-side applications, with a 0.5P energy efficiency of 95%. Furthermore, the 392Ah cell is fully compatible in size with existing 314Ah production lines and officially entered mass production last year.
Pylontech
Pylontech made a grand appearance with its all-scenario battery solutions, adopting a dual-scenario layout of "energy storage + light motive power," comprehensively demonstrating its overall strength in cells, systems, and scenario-based applications.
Notably, its 601Ah large-capacity energy storage cell achieves an energy density of 426Wh/L, a cycle life exceeding 12,000 cycles, and an energy efficiency of 96.5%. The PyOcean-M9-8000 liquid-cooled containerized energy storage system, built upon this cell, utilizes a pre-wiring and bottom-outlet design. In practical applications, it can reduce on-site foundation construction by approximately 10% and lower the overall investment cost of related power station projects by more than 10%.
Great Power
At the exhibition, Great Power displayed its 648Ah "Fengpeng" large cell, alongside its 180Ah sodium-ion products and the "Qingtian" 520 C&I (commercial and industrial) energy storage product.
Desay Battery
Desay Battery showcased a concentrated array of products, including cells, modules, battery packs, and C&I energy storage systems. In terms of cells, it exhibited self-developed products such as 100Ah, 280Ah, and 314Ah lithium iron phosphate (LFP) cells, as well as a 43Ah sodium-ion battery.
For modules, battery packs, and energy storage systems, it showcased 100Ah lithium battery modules, 314Ah lithium battery modules, 52S battery packs, along with the Lumos 261kWh C&I all-in-one cabinet, the Lumos 417kWh C&I DC cabinet, the high-rate lithium battery cabinet LPC 2.0, stacked split units, rack-mounted integrated units, and the Vita series 6.25MWh liquid-cooled containerized energy storage system.
Shuangdeng Group
At the exhibition, Shuangdeng Group primarily showcased its 314Ah, 588Ah, 601Ah, and 755Ah cell products, as well as the Power Warden 4.0 AI+ 8MWh semi-solid-state energy storage system built upon its 755Ah semi-solid-state cell.
Sunwoda
Sunwoda highlighted a complete energy storage cell matrix at this exhibition, forming a capacity hierarchy that covers various system design requirements.
In addition to the mature 102Ah, 280Ah, and 314Ah energy storage cells that have been long-verified by the market, Sunwoda also launched two flagship cells, the 588Ah and 684Ah, targeting high-capacity demands. These two large-capacity products adopt winding and stacking manufacturing processes, respectively. Notably, the mass production volume of the 684Ah stacked cell had exceeded 2 million units by the end of March 2026.
EVE Energy
EVE Energy mainly exhibited its 628Ah cell product, the Mr. Giant energy storage system, and its 6.9MWh large battery energy storage system.
BYD
BYD's main exhibits at this exhibition were its 2710Ah energy storage-dedicated Blade Battery and its 320Ah/335Ah energy storage cell products. Among them, the capacity of the 2710Ah energy storage-dedicated Blade Battery is more than 300% higher than that of conventional industry batteries.
Ganfeng Lithium
At the exhibition, Ganfeng Lithium primarily displayed its self-developed large-capacity, high-efficiency energy storage cells, including 314Ah, 392Ah, and 588Ah models, as well as its C&I energy storage solutions.
CosMX
CosMX mainly exhibited its 314Ah cell, a new type of energy storage battery pack, and the AC BESS integrated AC energy storage system. It also released a megawatt-level solar-storage-diesel microgrid solution and AIDC (AI Data Center) related products.
Coslight Power
In the fields of large-scale grid-side applications and renewable energy paired with storage, Coslight Power brought its new generation of liquid-cooled power energy storage systems: the "Liquid-Cooled DC Side EnerGalactic-6261" and the "835kWh Liquid-Cooled Energy Storage Cabinet."
Targeting the cost-reduction and efficiency-enhancement needs of industrial parks, commercial buildings, and charging stations, Coslight Power launched its new generation C&I energy storage system, the "POWERECO 60kW/120kWh."
Additionally, it showcased 314Ah, 345Ah, 588Ah, and 720Ah lithium iron phosphate cells, as well as multiple sodium-ion batteries.
China Sodium-ion Group
China Sodium-ion Group mainly exhibited the world's first 588Ah large sodium-ion cell, specifically designed for C&I energy storage, grid-side applications, and AIDC backup power scenarios.
Higee Energy
At this exhibition, Higee Energy primarily showcased its 587Ah and 688Ah cell products.
China Automotive New Energy Battery
China Automotive New Energy Battery mainly exhibited its 314Ah, 592Ah, and 588Ah energy storage cell products. Among these, the 588Ah large-capacity energy storage cell/module boasts a cycle life of 10,000 cycles and has passed international certifications such as UN38.3 and UL9540A, making it suitable for large-scale energy storage and C&I energy storage.
Source：EnergyTrend