CORNEX Launches Next-Gen 688Ah Energy Storage Battery Cell

CORNEX has successfully rolled out the first batch of its next-generation 688Ah energy storage (ES) battery cells, developed in collaboration with CRRC Zhuzhou Locomotive. This milestone highlights the deep expertise of both companies in energy storage and marks a significant step forward in advancing the industry into the "double-six" era—where individual battery cells exceed 600Ah and energy storage systems surpass 6MWh.

Setting New Benchmarks in Performance

The CORNEX 688Ah ES battery cell is engineered to meet the growing demands of the "double-six" era, delivering groundbreaking advancements in energy density, intrinsic safety, efficiency, and cost control.

1. High Energy Density

Designed with same-side tabs and a convex plate structure, the battery maximizes space utilization, allowing for higher energy output in a compact footprint. It incorporates high-density LFP materials and an optimized stacking process, achieving:

• Gravimetric energy density: ~200Wh/kg
• Volumetric energy density: >430Wh/L (8% increase over the previous generation)

2. Industry-Leading Safety Standards

Safety remains paramount with the 688Ah ES battery cell, which integrates:

• Highly infiltrative electrolytes & double-sided ceramic separators to minimize side reactions and enhance thermal stability.
• Over 50 CCDs & 3,000+ monitoring points on fully automated, digitalized, and intelligent production lines.
• Rigorous safety tests, including needle penetration and thermal runaway resistance, exceeding national safety standards.

3. Unmatched Economic Returns

With a 2.2 kWh capacity per cell, a 10,000-cycle lifespan, and an energy conversion efficiency of 95%, this battery is ideal for industrial, commercial, and large-scale energy storage applications. A 20-foot container system equipped with these cells achieves:

• 6.9MWh system capacity (up from 5MWh)
• 20% reduction in floor space for the same-scale system
• Lower total cost of ownership & higher ROI for power plant operators

Driving the Future of Energy Storage

CORNEX continues to push the boundaries of battery performance, safety, and cost-effectiveness, pioneering large-capacity battery technologies to accelerate the global energy transition. In 2024, the company has made multiple breakthroughs in cycle life, energy efficiency, and system reliability—and the 688Ah ES battery, a joint achievement with CRRC Zhuzhou Locomotive, will play a crucial role in realizing large-scale, cost-efficient energy storage solutions.

With this powerful innovation, CORNEX is set to make a lasting impact on the global energy landscape, driving sustainability and transformation in energy storage.

Edit by paco