Sunwoda's New 684Ah and 588Ah Storage Cells Boost Energy Transition

As global energy transition accelerates, energy storage is evolving from a supportive component to a core pillar in integrating renewables with the grid. According to BloombergNEF and the International Energy Agency (IEA), the worldwide capacity for new energy storage installations is projected to grow at a compound annual rate of 30%-40% through 2030. In this context, storage cells with high capacity, safety, and longevity have become critical for reducing levelized cost of energy and enhancing system integration efficiency.

At the pivotal 2025 International Digital Energy Expo in Shenzhen, which opened on September 18, Sunwoda unveiled its latest 684Ah and 588Ah energy storage cells. These innovations address key industry challenges, offering reliable solutions to advance the sector's development.

The 684Ah cell utilizes advanced stacking technology, achieving a volumetric energy density exceeding 440 Wh/L—among the best in its class. It incorporates a "thermal-electric separation" design and 3D cooling structure to optimize thermal management, significantly improving safety and long-term reliability. With a service life of over 20 years, it meets extended operational needs. The cell is compatible with various container solutions (10-foot, 20-foot, 30-foot), and its high energy density simplifies deployment, reducing lifetime electricity costs by 8% compared to conventional options.

The 588Ah cell employs mature winding processes and low-lithium-loss technology to minimize capacity degradation over time. It delivers up to 10,000 cycles at 70% state of health, ensuring over 20 years of service. With 96.5% energy efficiency, enhanced safety electrolytes, and directed venting channels, it optimizes cost-effectiveness for demanding applications.

Chen Tao, General Manager of Sunwoda's Energy Storage Business Unit, stated, "The launch of the 684Ah and 588Ah cells reflects our commitment to innovation and large-capacity storage technology. Our focus remains on providing safe, high-quality solutions for diverse scenarios."

Sunwoda's product portfolio now spans multiple technical routes and capacities. While the 684Ah and 588Ah cells use different processes (stacking vs. winding), both emphasize longevity, efficiency, and economy, catering to varied storage needs. Moving forward, Sunwoda will continue to enhance innovation and manufacturing, delivering higher density, longer life, and better value to support global sustainability.

These breakthroughs are backed by Sunwoda's nearly three decades of lithium battery expertise. The company has expanded beyond traditional manufacturing to offer integrated green energy solutions, including consumer batteries, EV power systems, and storage. At the expo, Sunwoda also highlighted its battery passport and recycling initiatives, strengthening its digital energy ecosystem.

The battery passport serves as a digital ID, mandating eight categories of sustainability data for EU market access. Leveraging a full-lifecycle data platform, Sunwoda uses AI to cut manual review by 90%, integrates 22 international standards, reduces certification time by 88%, and ensures security via encryption and blockchain.

Battery recycling is key to Sunwoda's circular economy strategy. With hubs in Shenzhen and global bases, the company focuses on recycling (for NMC/LFP systems) and second-life applications, streamlining the full chain from collection to reuse.

Edit by paco