Bak Battery Revolutionizes Energy Storage with 688Ah Cell Launch at CIBF 2025

2025-05-27 | Calvin

New Large-Format Cell Delivers 8% System Cost Reduction and Unmatched Performance

Shenzhen, China - At the 17th China International Battery Fair (CIBF 2025), Bak Battery made waves in the energy storage industry with the debut of its groundbreaking 688Ah large-format energy storage cell, setting new benchmarks for energy density, cost efficiency, and safety in utility-scale storage applications.

With energy storage transitioning from "scale expansion" to "high-quality development," Bak Battery's 688Ah cell represents a significant leap forward in large-capacity battery technology, offering system-level energy density exceeding 435Wh/L.

Technical Specifications at a Glance:

• Capacity: 688Ah
• System Energy: 6.9MWh (20' standard container)
• Cycle Life: >12,000 cycles
• Calendar Life: 20+ years (matching PV plant lifespan)
• Energy Density: >435Wh/L

Transformative Economic Advantages: System-Level Cost Savings

The 688Ah cell delivers substantial operational efficiencies across multiple dimensions:

• 8% reduction in overall system costs
• 20% fewer components compared to standard 20' container systems
• 20% smaller footprint for equivalent energy capacity

Uncompromising Safety Performance: Industry-Leading Safety Standards

Bak Battery's 688Ah cell meets rigorous safety requirements with exceptional thermal stability:

• Passes all standard abuse tests (overcharge, short circuit, thermal runaway, nail penetration)
• No fire or explosion under extreme conditions
• Excellent high-temperature stability

Breakthrough Technological Innovations

Structural Advancements

• Proprietary wound stacking structure for manufacturing efficiency
• Reduced impedance and improved thermal management
• Uniform temperature distribution for enhanced safety

Material Science Breakthroughs

• High-stability, high-density lithium iron phosphate (LFP) cathode
• Long-cycle single-particle graphite anode
• Proprietary high-stability, long-cycle high-temperature electrolyte
• Functional additives for optimal performance balance

"As energy storage becomes the core component of new power systems, we're committed to driving the industry forward through continuous innovation," said a Bak Battery spokesperson. "Our 688Ah cell addresses the growing market demand for large-format storage solutions while delivering unprecedented economic and safety benefits."

Powering the Energy Transition

With global energy systems undergoing profound transformation, Bak Battery's 688Ah large-format cell provides system integrators with a high-performance solution that supports the sustainable development of the energy storage industry. The company remains dedicated to technological innovation that meets the evolving needs of utility-scale storage applications.